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| Publications of Leslie J. Digby :chronological alphabetical combined listing:
%% Book Sections/Chapters
@misc{fds303334,
Author = {Digby, LJ},
Title = {Cooperative Breeding},
Booktitle = {International Encyclopedia of Primatology},
Publisher = {Wiley Blackwell},
Editor = {Fuentes, A},
Year = {2015},
Month = {December},
Key = {fds303334}
}
@misc{fds300077,
Author = {Digby, LJ},
Title = {Activity and ranging patterns in common marmosets
(Callithrix jacchus): implications for reproductive
strategies.},
Pages = {175-185},
Booktitle = {Adaptive Radiations of Neotropical Primates},
Publisher = {Springer Science & Business Media},
Editor = {Norconk, M and Rosenberger, A and Garber, P},
Year = {2011},
Month = {June},
ISBN = {9781441987709},
Abstract = {Lorini, M.L. and Persson, V.G. 1994. Status of field
research on Leontopithecus caissara: the Black-Faced Lion
Tamarin Project. Neotropical Primates, 2(suppl.): 52–55.
Mace, G. and Stuart, S. 1994. Draft IUCN Red List
categories, Version 2.2.},
Key = {fds300077}
}
@misc{fds300080,
Author = {Digby, LJ and Ferrari, SF and Saltzman, W},
Title = {The role of competition in cooperatively breeding
species},
Pages = {91-107},
Booktitle = {Primates in Perspective},
Publisher = {Oxford University Press, USA},
Editor = {Campbell, C and Fuentes, A and MacKnight, KC and Panger, M and Bearder,
S},
Year = {2011},
ISBN = {9780195390438},
Key = {fds300080}
}
@misc{fds52271,
Author = {L. Digby and W. Saltzman},
Title = {Balancing cooperation and competition in callitrichid
primates: examining the relative risk of infanticide across
species},
Booktitle = {The Smallest Anthropoids: The Marmoset/Callimico
Radiation},
Publisher = {Springer Verlag},
Editor = {SM Ford and LM Porter and LC Davis},
Year = {2009},
Month = {November},
ISBN = {978-1-4419-0292-4},
Abstract = {At least seven cases of infanticide by females other than
the mother have been observed in wild groups of common
marmosets (Callithrix jacchus), with several more cases
described for captive groups. Infanticide by females other
than the mother has not, however, been documented for wild
groups of other callitrichine species. Why might such overt
aggression toward infants occur in one species and not
others? In the common marmoset, a variety of social,
reproductive and ecological characteristics – including
short inter- birth intervals (and the resulting potential
for overlapping of pregnancies and births), habitat
saturation, small home ranges, and low cost of infant care
(including decreased travel costs and short dependency
periods compared to other callitrichines) – may contribute
to an increased likelihood of two breeding females being
present in a group, which in turn gives rise to the
potential for competition between breeding females and
ultimately to infanticide. These conditions are less common
in wild groups of most other callitrichines species. All
callitrichines balance the need for cooperative care of
young with the reproductive competition that results from
limited reproductive opportunities; however ecological and
social conditions appear to tip the balance toward
infanticide more frequently in common marmosets than in
other callitrichine species.},
Key = {fds52271}
}
@misc{fds153453,
Author = {Abbott, D.H. and Digby, L.J. and Saltzman, W.},
Title = {Reproductive skew in female common marmosets: contributions
of infanticide and subordinate self restraint.},
Booktitle = {Reproductive Skew in Vertebrates: Proximate and Ultimate
Causes},
Publisher = {Cambridge University Press},
Editor = {Hagar, R. and Jones, C.},
Year = {2009},
Month = {September},
ISBN = {978-0-521-86409-1},
Key = {fds153453}
}
@misc{fds300079,
Author = {Digby, LJ and Saltzman, W},
Title = {Balancing cooperation and competition in callitrichine
primates: examining the relative risk of infanticide across
species.},
Pages = {135-154},
Booktitle = {The Smallest Anthropoids The Marmoset/Callimico
Radiation},
Publisher = {Springer Science & Business Media},
Editor = {Ford, S and Porter, L and Davis, L},
Year = {2009},
Month = {August},
ISBN = {9781441902931},
Abstract = {Here is a comprehensive examination of the newly recognized
callimico/marmoset clade, which includes the smallest
anthropoid primates on earth.},
Key = {fds300079}
}
@misc{fds291868,
Author = {Abbott, DH and Digby, L and Saltzman, W},
Title = {Reproductive skew in female common marmosets:
Contributionsof infanticide and subordinate
self-restraint},
Pages = {337-368},
Booktitle = {Reproductive Skew in Vertebrates: Proximate and Ultimate
Causes},
Publisher = {Cambridge University Press},
Year = {2009},
Month = {January},
ISBN = {9780521864091},
url = {http://dx.doi.org/10.1017/CBO9780511641954.014},
Abstract = {The common marmoset (Callithrix jacchus) is a cooperatively
breeding monkey that exhibits high reproductive skew among
females. At the proximate level, this high skew is
maintained, for the most part, by reproductive selfrestraint
in subordinates, involving specialized behavioral and
neuroendocrine responses to the presence of a dominant
female. When subordinates terminate this self-restraint,
however, dominant females frequently control subordinates’
reproductive attempts by killing their infants. Based on
data collected over 20 years from both the field and the
laboratory, we propose that such infanticide constitutes not
only a proximate mechanism limiting subordinate females’
reproductive success, but also an ultimate mechanism
favoring selection for reproductive self-restraint in
subordinate females. Our hypothesis is consistent with both
the commitment model of reproductive skew (Hamilton 2004),
in terms of pre-conception restraint, and the discriminate
infanticide model (Hager & Johnstone 2004), in terms of
infanticide as a mechanism driving subordinate
self-restraint. Parallel, long-term field and laboratory
studies of common marmosets provide powerful
interdisciplinary approaches enabling investigation of
mechanisms regulating female reproductive skew at a
proximate level, while providing novel insight into
potential ultimate causation. Introduction Among primates,
moderate female reproductive skew, manifest as high
reproductive success among a limited number of adult females
in a social group, is associated with social dominance in
many species (Abbott et al. 2003). Extreme monopoly of
reproduction by only one or two females, however, is
restricted to most, but not all, members of a single primate
subfamily, the Callitrichinae (the marmosets and tamarins).
These species, especially the well-studied common marmoset
(Callithrix jacchus), present an opportunity to integrate
both proximate and ultimate explanations of reproductive
strategies in order to better understand the evolution and
mechanisms of reproductive skew.},
Doi = {10.1017/CBO9780511641954.014},
Key = {fds291868}
}
@misc{fds44364,
Author = {L.J. Digby and S.F. Ferrari and W. Saltzman},
Title = {Callitrichines: the role of competition in cooperatively
breeding species.},
Booktitle = {Primates in Perspective},
Publisher = {Oxford University Press},
Editor = {K.C. MacKinnon and M. Panger and S. Bearder and C. Campbell and A.
Fuentes},
Year = {2006},
Month = {February},
Key = {fds44364}
}
@misc{fds300078,
Author = {Digby, LJ},
Title = {Infanticide by female mammals: implications for the
evolution of social systems},
Pages = {423-446},
Booktitle = {Infanticide by Males and Its Implications},
Publisher = {Cambridge University Press},
Editor = {C. van Schaik and C. Janson},
Year = {2000},
Month = {November},
ISBN = {9780521774987},
Abstract = {Infanticide by males and its implications Male primates,
carnivores and rodents sometimes kill infants that they did
not sire. Infanticide by males is a relatively common
phenomenon in these groups, but tends to be rare in any
given species.},
Key = {fds300078}
}
%% Papers Published
@article{fds291879,
Author = {Saltzman, W and Digby, LJ and Abbott, DH},
Title = {Reproductive skew in female common marmosets: what can
proximate mechanisms tell us about ultimate
causes?},
Journal = {Proceedings. Biological sciences},
Volume = {276},
Number = {1656},
Pages = {389-399},
Year = {2009},
Month = {February},
ISSN = {0962-8452},
url = {http://dx.doi.org/10.1098/rspb.2008.1374},
Abstract = {Common marmosets are cooperatively breeding monkeys that
exhibit high reproductive skew: most subordinate females
fail to reproduce, while others attempt to breed but produce
very few surviving infants. An extensive dataset on the
mechanisms limiting reproduction in laboratory-housed and
free living subordinate females provides unique insights
into the causes of reproductive skew. Non-breeding adult
females undergo suppression of ovulation and inhibition of
sexual behaviour; however, they receive little or no
aggression or mating interference by dominants and do not
exhibit behavioural or physiological signs of stress.
Breeding subordinate females receive comparable amounts of
aggression to non-breeding females but are able to conceive,
gestate and lactate normally. In groups containing two
breeding females,however, both dominant and subordinate
breeders kill one another's infants. These findings suggest
that preconception reproductive suppression is not imposed
on subordinate females by dominants, at a proximate level,
but is instead self-imposed by most subordinates, consistent
with restraint models of reproductive skew. In contrast to
restraint models, however, this self-suppression probably
evolved not in response to the threat of eviction by
dominant females but in response to the threat of
infanticide. Thus,reproductive skew in this species appears
to be generated predominantly by subordinate self-restraint,
in a proximate sense, but ultimately by dominant control
over subordinates' reproductive attempts.},
Doi = {10.1098/rspb.2008.1374},
Key = {fds291879}
}
@article{fds291880,
Author = {Digby, L and McLean Stevens and A},
Title = {Maintenance of female dominance in blue-eyed black lemurs
(Eulemur macaco flavifrons) and gray bamboo lemurs
(Hapalemur griseus griseus) under semi-free-ranging and
captive conditions.},
Journal = {Zoo biology},
Volume = {26},
Number = {5},
Pages = {345-361},
Year = {2007},
Month = {September},
ISSN = {0733-3188},
url = {http://dx.doi.org/10.1002/zoo.20140},
Abstract = {Several species of Malagasy prosimians are characterized by
female dominance, an unusual trait among mammals. We compare
the extent to which female dominance is displayed and the
mechanisms that are used to maintain dominance in the
frugivorous blue-eyed black lemurs (Eulemur macaco
flavifrons) and the folivorous gray bamboo lemurs (Hapalemur
griseus griseus) housed at the Duke Lemur Center. All
dominant-submissive interactions were recorded during 448 hr
of focal animal observations. Both species of lemurs
exhibited clear patterns of female dominance. However, the
two species used aggressive dominance (defined as
aggression+submission) and social dominance (defined as
submission in the absence of aggression) to different
extents in maintaining hierarchies within each group. The
adult female blue-eyed black lemurs used aggressive
dominance (e.g., chase, cuff, bite) in more of their
dominance interactions (66%) than did the adult female gray
bamboo lemurs (40%). In both species, rates of aggressive
dominance interactions were higher during feeding versus
nonfeeding periods and while in smaller outdoor runs versus
larger natural habitat enclosures, but the differences were
not significant. Overall blue-eyed black lemurs exhibit a
more aggressive form of female dominance compared to the
gray bamboo lemur. Zoo Biol 26:345-361, 2007. (c) 2007
Wiley-Liss, Inc.},
Doi = {10.1002/zoo.20140},
Key = {fds291880}
}
@article{fds291878,
Author = {Digby, LJ and Kahlenberg, SM},
Title = {Female dominance in blue-eyed black lemurs(Eulemur macaco
flavifrons).},
Journal = {Primates; journal of primatology},
Volume = {43},
Number = {3},
Pages = {191-199},
Year = {2002},
Month = {July},
ISSN = {0032-8332},
url = {http://www.ncbi.nlm.nih.gov/pubmed/12145400},
Abstract = {Female dominance is unusual among mammals and has been
described in detail for only a handful of species. Here we
present data on the frequency and outcome of dominance
interactions in seven semi-free ranging and captive groups
of blue-eyed black lemurs (Eulemur macaco flavifrons) housed
at the Duke University Primate Center. We collected over 260
hours of focal data during which all occurrences of
dominant-subordinate interactions were recorded. We
collected data outside the typical breeding and birthing
seasons for this species, thus eliminating possible
confounding factors and increased aggression associated with
these periods. We found that females were dominant over
males in all seven groups, with females winning 99% of all
dominance interactions. E. m. flavifrons used aggressive
dominance (e.g. chase, cuff, bite) in 81% of all
interactions, with the remainder of interactions being
decided using social dominance (e.g. deference in the form
of supplants or cowers). Older females were dominant over
younger females in two out of three multi-female groups (in
each case, younger females were daughters), and younger
males (sons of the dominant female) received less aggression
from females than did older males (n = 2 groups). Caging and
group size appear to play a minimal role in the expression
of female dominance. While confirmation must await further
observations on free-ranging groups of E. m. flavifrons, our
data strongly suggest that this subspecies can be
characterized as female dominant.},
Doi = {10.1007/bf02629647},
Key = {fds291878}
}
@article{fds291881,
Author = {Nievergelt, CM and Digby, LJ and Ramakrishnan, U and Woodruff,
DS},
Title = {Genetic analysis of group composition and breeding system in
a wild common marmoset (Callithrix jacchus)
population},
Journal = {International Journal of Primatology},
Volume = {21},
Number = {1},
Pages = {1-20},
Year = {2000},
Month = {January},
url = {http://dx.doi.org/10.1023/A:1005411227810},
Abstract = {We established pedigree relations in three wild common
marmoset social groups for which observational data were
available, together with genotypes of some individuals from
neighboring groups. Relatedness of 40 individuals were based
on 11 microsatellite loci amplified from nDNA obtained
noninvasively from plucked hair. The wild marmosets were
only half as variable as a captive population characterized
previously: 2-6 alleles/locus; H(o) = 0.41 and H(E) = 0.35.
Parentage exclusion probabilities were 61.8% for an
offspring and one alleged parent and 90.7% for an offspring
with one confirmed and one alleged parent. Each group (n =
5-14 individuals) had two breeding females and ≥2 adult
males. Within each group the infants and reproductively
inactive adults were closely related to at least the
breeding females; the latter were related to each other as
closely as mother/infant pairs or sisters. Relatedness of
adult males was lower, indicating recent intergroup
dispersal. Genetic data confirm Callithrix jacchus live in
relatively stable extended family groups of closely related
individuals. Matings occurred preferentially among the least
related adults and most infants were fathered by the
dominant male. The genetic data are consistent with
polygynmonandry as are the field observations. Callithrix
have variable mating systems, ranging from monogamy to
polyandry to polygyny within social groups plus extragroup
copulations; our data provide no evidence for polyandry and
are inconclusive with respect to extragroup paternity.
Nevertheless, noninvasive multilocus genotyping methods will
resolve these questions when longer-term studies of entire
populations are undertaken.},
Doi = {10.1023/A:1005411227810},
Key = {fds291881}
}
@article{fds291877,
Author = {Archie, EA and Digby, LJ},
Title = {Juvenile dominance in Eulemur macaco flavifrons: the
influence of sex and maternal rank.},
Journal = {Folia primatologica; international journal of
primatology},
Volume = {70},
Number = {5},
Pages = {277-281},
Year = {1999},
Month = {September},
ISSN = {0015-5713},
url = {http://www.ncbi.nlm.nih.gov/pubmed/10567834},
Doi = {10.1159/000021708},
Key = {fds291877}
}
@article{fds291890,
Author = {Digby, LJ},
Title = {Sexual behavior and extragroup copulations in a wild
population of common marmosets (Callithrix
jacchus).},
Journal = {Folia primatologica; international journal of
primatology},
Volume = {70},
Number = {3},
Pages = {136-145},
Year = {1999},
Month = {January},
ISSN = {0015-5713},
url = {http://www.ncbi.nlm.nih.gov/pubmed/10394062},
Abstract = {Sexual behavior and mating patterns are described for 3
free-ranging groups of common marmosets living in a coastal
forest in northeastern Brazil. Each group contained 2
breeding females. Within groups, sexual behavior was
generally restricted to breeding females and a single
behaviorally dominant male. Of 101 mounts and copulations,
24 involved pairings of individuals from 2 different groups.
Extragroup sexual behavior was performed by both breeding
and nonbreeding group members, and 65% of all adults mounted
or copulated with an extragroup individual at least once.
Sexual behavior occurred throughout the female reproductive
cycle but was significantly more frequent during an 11-day
'conception period'. Thus, while female marmosets show no
physical signs of estrus, both males and females likely do
have some information about the timing of ovulation. Mating
patterns in this population included both polygyny and
monogamy and varied between groups and over
time.},
Doi = {10.1159/000021686},
Key = {fds291890}
}
@article{fds291891,
Author = {Digby, LJ},
Title = {Targeting aggression in blue-eyed black lemurs (Eulemur
macaco flavifrons)},
Journal = {Primates},
Volume = {40},
Number = {4},
Pages = {613-617},
Publisher = {Springer Nature},
Year = {1999},
Month = {January},
url = {http://dx.doi.org/10.1007/BF02574836},
Doi = {10.1007/BF02574836},
Key = {fds291891}
}
@article{fds291889,
Author = {Digby, LJ and Barreto, CE},
Title = {Vertebrate predation in common marmosets},
Journal = {Neotropical Primates},
Volume = {6},
Number = {4},
Pages = {124-126},
Year = {1998},
Key = {fds291889}
}
@article{fds291887,
Author = {Ferrari, SF and Digby, LJ},
Title = {Wild Callithrix groups: stable extended families?},
Journal = {American Journal of Primatology},
Volume = {38},
Number = {1},
Pages = {19-27},
Year = {1996},
url = {http://dx.doi.org/10.1002/(sici)1098-2345(1996)38:1<19::aid-ajp3>3.0.co;2-w},
Abstract = {Data from field studies of three Callithrix species, C.
flaviceps, C. intermedia, and C. jacchus, are considered in
an attempt to characterize group dynamics in this genus. The
three groups considered in detail contrast significantly in
many behavioral (mating system, ranging behavior, activity
patterns) and ecological (zoogeography, habitat, diet)
variables. Despite this, all three groups are highly similar
in a number of characteristics, including relatively large
size, high reproductive output, and low rates of migration.
The evidence suggests that Callithrix groups may frequently
encompass three generations and are characterized by a high
degree of both stability and relatedness between group
members. © 1996 Wiley-Liss, Inc.},
Doi = {10.1002/(sici)1098-2345(1996)38:1<19::aid-ajp3>3.0.co;2-w},
Key = {fds291887}
}
@article{fds291888,
Author = {Digby, LJ and Ferrari, SF and Castro, AAJF},
Title = {Preliminary records of common marmosets in the Parque
Nacional de Sete Cidades, Piauí, Brazil},
Journal = {Neotropical Primates},
Volume = {4},
Number = {2},
Pages = {53-55},
Year = {1996},
Key = {fds291888}
}
@article{fds291885,
Author = {Digby, LJ},
Title = {Social organization in a wild population of Callithrix
jacchus: II. Intragroup social behavior},
Journal = {Primates},
Volume = {36},
Number = {3},
Pages = {361-375},
Publisher = {Springer Nature},
Year = {1995},
Month = {July},
ISSN = {0032-8332},
url = {http://dx.doi.org/10.1007/BF02382859},
Abstract = {The social behavior of the common marmoset has been well
studied in captivity, but little is known about the social
dynamics of this species in its natural habitat. Social
relationships were studied in three polygynous groups of
common marmosets, Callithrix jacchus, in northeastern
Brazil. Breeding adults appeared to be the center of social
life and were the most frequent grooming partners or nearest
neighbors for most adult group members. The observations of
unidirectional agonistic interactions suggest that breeding
adults were also dominant over all other group members, but
that neither sex was dominant over the other. The dynamics
of within-group social relationships are likely to be
important determinants in the reproductive strategies
employed by marmoset females. © 1995 Japan Monkey
Centre.},
Doi = {10.1007/BF02382859},
Key = {fds291885}
}
@article{fds291886,
Author = {Digby, L},
Title = {Infant care, infanticide, and female reproductive strategies
in polygynous groups of common marmosets (Callithrix
jacchus)},
Journal = {Behavioral Ecology and Sociobiology},
Volume = {37},
Number = {1},
Pages = {51-61},
Publisher = {Springer Nature},
Year = {1995},
Month = {January},
url = {http://dx.doi.org/10.1007/BF00173899},
Abstract = {Reproduction in marmoset and tamarin groups is typically
restricted to a single dominant female, but it is unclear
why subordinate females tolerate delayed reproduction. The
presence of two breeding females in free-ranging groups of
common marmosets (Callithrix jacchus) presented a unique
opportunity to examine differences in the reproductive
strategies of dominant and subordinate females. Three groups
were monitored for 12–18 months at a forest reserve in
northeastern Brazil. Data on infant care were collected
during two consecutive all-day follows every 10 days until
the infants were 2 months old. Carrying patterns for infants
born to dominant females were similar to those observed in
groups containing a single breeding female. All group
members over 5 months of age participated in infant care,
and dominant females allowed some group members to carry
their infants from the 1 st day of life. In contrast,
subordinate females were protective of their offspring and
were their sole caretakers for at least a week following
birth. One infant born to a subordinate was killed in an
attack involving the dominant female. Overall, dominant
females gave birth to more infants and had higher infant
survival than did subordinate breeding females. subordinate
females were successful in rearing young only when the
timing of births was such that they did not overlap with the
dependency period of infants born to the dominant female.
These patterns suggest that subordinate females may face
resource competition, especially over access to helpers. In
times of severe competition, subordinate females that delay
reproduction may be avoiding a wasted reproductive effort.
© 1995, Springer-Verlag. All rights reserved.},
Doi = {10.1007/BF00173899},
Key = {fds291886}
}
@article{fds291884,
Author = {Digby, LJ and Ferrari, SF},
Title = {Multiple breeding females in free-ranging groups of
Callithrix jacchus},
Journal = {International Journal of Primatology},
Volume = {15},
Number = {3},
Pages = {389-397},
Publisher = {Springer Nature},
Year = {1994},
Month = {June},
ISSN = {0164-0291},
url = {http://dx.doi.org/10.1007/BF02696100},
Abstract = {We present observations on the breeding patterns in a
free-ranging population of common marmosets, Callithrix
jacchus We found evidence of the simultaneous presence of
two reproductively active females in all three monitored
groups. We recorded at least one full reproductive cycle
(conception-birth) for two females in each group, but other
adult females did not breed. An overview of data from other
callitrichid field studies indicates that the observed
pattern may be an additional characteristic of the
flexibility of the social organization of common marmosets.
Comparisons with data from other sites where callithrix has
been studied indicate that the presence of a second breeding
female in a group may be related to high population density,
though the underlying mechanisms remain unclear. © 1994
Plenum Publishing Corporation.},
Doi = {10.1007/BF02696100},
Key = {fds291884}
}
@article{fds291883,
Author = {Tardif, S and Hyde, K and Digby, L},
Title = {. Evidence for suppression of ovulation in singly-housed
female common marmosets (Callithrix jacchus)},
Journal = {Laboratory Primate Newsletter},
Volume = {33},
Number = {2},
Pages = {1-4},
Year = {1994},
Key = {fds291883}
}
@article{fds291882,
Author = {Digby, LJ and Barreto, CE},
Title = {Social organization in a wild population of Callithrix
jacchus. I. Group composition and dynamics.},
Journal = {Folia primatologica; international journal of
primatology},
Volume = {61},
Number = {3},
Pages = {123-134},
Year = {1993},
Month = {January},
url = {http://dx.doi.org/10.1159/000156739},
Abstract = {Data are presented on group dynamics in a wild population of
the common marmoset, Callithrix jacchus, in northeastern
Brazil. Three marked and habituated groups were observed,
and composition noted, for at least 5 days a month over
12-18 consecutive months. Group sizes ranged from 5 to 15
individuals, and changes in group composition were the
result of births, immigrations, and disappearances. No
immigrations into the main study groups were observed
throughout the study period. None of the three known
emigrants was known to join an established or incipient
group for up to 10 weeks after their departure. One group
contained only breeding individuals and their offspring.
Observations of recruitment and loss in the other two groups
suggest that they, too, were extended family groups. The
group dynamics described in studies of other populations of
Callithrix suggest that extended family groups, or at least
groups consisting of breeding individuals and their close
relatives, may be characteristic of those
populations.},
Doi = {10.1159/000156739},
Key = {fds291882}
}
%% Book Reviews
@article{fds300081,
Author = {DIGBY, L},
Title = {MARMOSETS AND TAMARINS - SYSTEMATICS, BEHAVIOR AND ECOLOGY -
RYLANDS,AB},
Journal = {ANIMAL BEHAVIOUR},
Volume = {49},
Number = {2},
Pages = {560-561},
Publisher = {ACADEMIC PRESS (LONDON) LTD},
Year = {1995},
Month = {February},
ISSN = {0003-3472},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995QH12300040&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds300081}
}
%% Other
@misc{fds300076,
Author = {Digby, LJ},
Title = {Social Organization and Reproductive Strategies in a Wild
Population of Common Marmosets (Callithrix
jacchus).},
Series = {Ph.D. Thesis, University of California, Davis},
Publisher = {Michigan: University Microfilms International},
Editor = {Rodman, P},
Year = {1994},
Key = {fds300076}
}
%% Papers Presented/Symposia/Abstracts
@article{fds291869,
Author = {Schneider-Crease, IA and Schopler, R and Digby,
LJ},
Title = {Cross-species parasite patterns: Pinworm prevalence in
captive lemurs.},
Journal = {AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY},
Volume = {150},
Pages = {243-244},
Publisher = {WILEY-BLACKWELL},
Year = {2013},
Month = {January},
ISSN = {0002-9483},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000318043202266&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291869}
}
@article{fds221762,
Author = {Scheider-Crease, I and Schopler, R and Digby,
L},
Title = {. Patterns of gastrointestinal parasite infection in
lemurs.},
Journal = {American Journal of Physical Anthropology},
Volume = {150},
Number = {S56},
Pages = {243-244},
Year = {2013},
Key = {fds221762}
}
@article{fds221763,
Author = {Pendleton, Z and Digby, L},
Title = {Behavioral thermoregulation in lemurs: the role of 3D use of
the forest..},
Journal = {Abstracts of the International Primatological
Society},
Year = {2012},
Key = {fds221763}
}
@article{fds300082,
Author = {Digby, L and King, L},
Title = {Social learning in the ring-tailed lemur},
Journal = {AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY},
Volume = {144},
Number = {supp 52},
Pages = {126-126},
Publisher = {WILEY-BLACKWELL},
Year = {2011},
Month = {January},
ISSN = {0002-9483},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000288034000209&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Abstract = {http://physanth.org/annual-meeting/2011/21502_AAPA-2011-Abstract.pdf},
Key = {fds300082}
}
@article{fds167023,
Author = {L.J. Digby},
Title = {A new technique for calculating 3D and 4D home range
volumes: an update},
Journal = {American Journal of Primatology},
Volume = {71 (supplement)},
Pages = {72},
Year = {2009},
Month = {September},
Abstract = {Home range use is a key element in any field study of
primate ecology. Yet traditional techniques call for a
simple two-dimensional area of range use, even for those
arboreal species that exist in a three-dimensional habitat.
Here, I present a new technique for calculating
three-dimensional (3D) home range “volumes” using
familiar techniques and, where possible, readily available
software. Data were collected on three semi-free ranging
groups (3-6 individuals/per group)housed in a large (11+ ha)
forested enclosure at the Duke Lemur Center in Durham, North
Carolina. Using focal animal sampling and GPS units, we
sampled height as well as latitude and longitude every 5
minutes. Results indicate that the groups had very similar
2D home range areas as calculated by traditional means
[range 1.7-1.9ha]. But, each group differed substantially in
their home range volumes [Lemur: 202,000 c3; Eulemur:
468,000 c3; Varecia: 576,000 c3], reflecting their
differences in height use. We used a “stacked grid”
calculation, but a stacked polygon method is also viable. We
are also working on a 3D version of kernel estimators. With
the miniaturization of GPS collars, allowing for location
24/7, we also hope to acquire four dimensional (4D) home
range volumes (x, y, z and time). Current studies using this
technique include investigating the impact of infants on
home range volumes and variation across years with varying
degrees of rainfall and forest disturbance.},
Key = {fds167023}
}
@article{fds291875,
Author = {Digby, LJ},
Title = {A NEW TECHNIQUE FOR DETERMINING THREE DIMENSIONAL AND FOUR
DIMENSIONAL HOME RANGE VOLUMES: AN UPDATE},
Journal = {AMERICAN JOURNAL OF PRIMATOLOGY},
Volume = {71},
Pages = {72-72},
Publisher = {WILEY-LISS},
Year = {2009},
Month = {August},
ISSN = {0275-2565},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000269369800132&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291875}
}
@article{fds291873,
Author = {Digby, LJ and Haley, M and Schneider, AC and del Valle,
I},
Title = {Sensorimotor intelligence in aye-ayes and other lemurs: A
puzzle box approach},
Journal = {AMERICAN JOURNAL OF PRIMATOLOGY},
Volume = {70},
Number = {supp 1},
Pages = {54-54},
Publisher = {WILEY-LISS},
Year = {2008},
Month = {June},
ISSN = {0275-2565},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000256456800103&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Abstract = {Aye-ayes, Daubentonia madagascariensis, have a larger than
expected encephalization quotient compared to other
prosimians, including a relatively large frontal cortex.
This suggests more complex sensorimotor abilities compared
to other lemurs, but previous tests have been equivocal. We
predicted aye-ayes could solve puzzle boxes if they were
allowed to “learn” to open the boxes via 3 increasingly
complex iterations of a puzzle box. We tested 8 aye-ayes
housed at the Duke Lemur Center using 3 versions of a puzzle
box with: 1) a simple cover that could be pulled off 2) a
single hinged cover and 3) a double-flapped cover. Each box
was baited with a favorite food item. Controls were
introduced only to box 3. Controls were later used as test
subjects. Six of the 8 test subjects were able to solve all
three puzzle box configurations. Only 2 of 5 control
subjects completed box 3, despite high interest. The study
was replicated with Lemur catta and Varecia variegata (n =
19). Only 3 of 12 test subjects and none of the control
subjects successfully completed the most complex box. These
preliminary results suggest a real difference in the
sensorimotor abilities of aye-ayes compared to other lemur
species. Tests are continuing to see if some of these
differences are due to the distinct foraging strategies of
each species.},
Key = {fds291873}
}
@article{fds153455,
Author = {L.J. Digby},
Title = {A new approach to primate home ranges: Using 3D and 4D data
to calculate home range volumes and use},
Journal = {International Journal of Primatology - Abstracts},
Year = {2008},
Abstract = {Home ranges are a key element to most field studies of
primate behaviour and ecology. Home range can be used to
determine the impact of changes in resource availability,
group size, and interspecies competition. As such, accurate
calculation of use of space is essential. While there have
been improvements in how we estimate home range use (e.g.,
least polygons and kernel estimators) all continue to use
only 2D measures. For arboreal species, this leaves out an
entire dimension – height. Here, I describe a new method
for determining 3D home range volumes using three species of
semi-free ranging lemurs housed in a large (11+ ha),
forested enclosure at the Duke Lemur Center. Using focal
animal sampling, the location of the animal was recorded
every five minutes using hand-held GPS units along with the
animal’s height in the trees. All three groups had home
range “areas” of approximately 2 ha (range: 1.7-1.9 ha),
but differed greatly in their use of height (12m – 30m
max. height). The resulting home range “volumes” thus
differed substantially: Lemur: 202,000 c3; Eulemur: 468,000
c3 ; Varecia: 576,000 c3. These calculations were determined
using a “stacked grid” method, but “stacked
polygons” could also be used. Ultimately, these more
complete descriptions of home range use, in conjunction with
new technologies that will allow for 24/7 data collection
(e.g., GPS collars), will allow for the calculation of 4D
(x,y, z coordinates + time) home range use and interactions
and for a more complete understanding of primate home
ranges.},
Key = {fds153455}
}
@article{fds291871,
Author = {Digby, LJ},
Title = {Marmosets: Cooperative breeders or fierce
competitors?},
Journal = {AMERICAN JOURNAL OF PRIMATOLOGY},
Volume = {69},
Number = {Supp 1},
Pages = {124-124},
Publisher = {WILEY-LISS},
Year = {2007},
Month = {June},
ISSN = {0275-2565},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000247093700192&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291871}
}
@article{fds291872,
Author = {Digby, LJ},
Title = {Determining home range "volumes" in primates: why are we
using two-dimensional measures for species that live in a
three-dimensional world?},
Journal = {AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY},
Pages = {100-100},
Publisher = {WILEY-LISS},
Year = {2007},
Month = {January},
ISSN = {0002-9483},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000244656500176&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Abstract = {Measures of home range are an important part of the ecology
of primate species. Changes in resource availability,
competition from sympatric species, and changes in group
size are all impact the use of space by a group. As such,
accurate measures of home range use are important in
understanding the basic ecology of a species. Yet,
traditionally, home range use has been measured as a
two-dimensional area, leaving out the third dimension,
height. This study lays out a method for calculating and
using three-dimensional home ranges using three species of
semi-free ranging lemurs housed in natural habitat
enclosures at the Duke Lemur Center. Using focal animal
sampling, animal location (determined by GPS) and height
estimates were recorded at 5-minute intervals throughout the
day. While home range areas did not vary greatly, height did
vary resulting in homes ranges of distinct volume and shape.
The use of three-dimensional home range volumes will allow
for more accurate determinations of how ecological variables
influence the costs of resource acquisition and protection
from predators in a variety of arboreal species. New
technologies that may enable the remote sensing of animal
movements through the forest will also be
discussed.},
Key = {fds291872}
}
@article{fds291874,
Author = {Digby, LJ and Saltzman, W},
Title = {Is infanticide by females more common in the common marmoset
(Callithrix jacchus)? Implications for how callitrichines
balance cooperation and competition.},
Journal = {AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY},
Pages = {95-95},
Publisher = {WILEY-LISS},
Year = {2005},
Month = {January},
ISSN = {0002-9483},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000227214900132&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291874}
}
@article{fds28305,
Author = {Digby, L.J. and Saltzman, S.F.},
Title = {Is infanticide by females unique to the common marmoset
(Callithrix jacchus)? Implications for how callitrichines
balance cooperation and competition},
Journal = {American Journal of Physical Anthropology},
Volume = {Supplement},
Year = {2005},
Abstract = {The callitrichines are known for their unusual reproductive
system where breeding is typically limited by physiological
suppression or behavioral inhibition to a single breeding
female per group. In those groups where a second female does
breed, the subordinate breeding female may still have
difficulty successfully raising young. At least six
infanticides by females other than the mother have been
observed in wild groups of common marmosets with several
more cases being described for captive groups. But
infanticide has not been documented for other wild groups of
callitrichines. Here we examine the contexts that give rise
to infanticide by females and how they differ across
callitrichines genera. Contexts include the prevalence of
polygynous groups (which in turn may be related to the
presence of an unrelated male), reproductive state of other
females in the group (including overlapping pregnancies and
presence of lactating females) and overall cost of infant
care.},
Key = {fds28305}
}
@article{fds291870,
Author = {Digby, LJ and Stevens, AM},
Title = {A comparison of female dominance in blue-eyed black lemurs
(Eulemur macaco flavifrons) and gray gentle lemurs
(Hapalemur griseus griseus)},
Journal = {AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY},
Pages = {88-88},
Publisher = {WILEY-BLACKWELL},
Year = {2004},
Month = {January},
ISSN = {0002-9483},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000207846400147&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291870}
}
@article{fds28306,
Author = {Digby, L.J. and Stevens, A.M.},
Title = {A comparison of female dominance in blue-eyed black lemurs
(Eulemur macaco flavifrons) and gray bamboo lemurs
(Hapalemur griseus griseus)},
Journal = {American Journal of Primatology, Supplement
38},
Pages = {88},
Year = {2004},
Key = {fds28306}
}
@article{fds28308,
Author = {Digby, L.J. and Kahlenberg, S.},
Title = {Female dominance in blue-eyed black lemurs (Eulemur macaco
flavifrons) at the Duke University Primate
Center},
Journal = {American Journal of Physical Anthropology},
Volume = {Supplement 28},
Pages = {119},
Year = {1999},
Key = {fds28308}
}
@article{fds28309,
Author = {Digby, L. Merrill and M.Y. and Davis, E.T.},
Title = {Infanticide as an extreme form of female reproductive
competition in primates and social carnivores},
Journal = {American Journal of Physical Anthropology},
Volume = {Supplement 26},
Pages = {77},
Year = {1998},
Key = {fds28309}
}
@article{fds28310,
Author = {Digby, L. and Merrill, M.Y. and Davis, E.T.},
Title = {Infanticide by female mammals. Part I: Primates},
Journal = {American Journal of Primatology},
Volume = {42},
Number = {2},
Pages = {105-106},
Year = {1997},
Key = {fds28310}
}
@article{fds291876,
Author = {Digby, LJ and Barreto, CE},
Title = {Activity and ranging patterns in common marmosets
(Callithrix jacchus) - Implications for reproductive
strategies},
Journal = {ADAPTIVE RADIATIONS OF NEOTROPICAL PRIMATES},
Pages = {173-185},
Booktitle = {Adaptive Radiations of Neotropical Primates},
Publisher = {PLENUM PRESS DIV PLENUM PUBLISHING CORP},
Editor = {Norconk, MA and Rosenberger, AL and Garber, PA},
Year = {1996},
Month = {January},
ISBN = {0-306-45399-1},
url = {http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1996BH52P00010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=47d3190e77e5a3a53558812f597b0b92},
Key = {fds291876}
}
@article{fds28311,
Author = {Digby, L.J. and Barreto, C.E.},
Title = {Female reproductive strategies in polygynous groups of
common marmosets},
Series = {Abstracts-XVIth Congress of the International Primatological
Society & XIXth Conference of the American Society of
Primatologists, Madison, Wisconsin #055},
Year = {1996},
Key = {fds28311}
}
@article{fds28314,
Author = {Abbott, D. H. and Digby, L.J. and French, J.A. and Saltzman,
W.},
Title = {Variation in the Breeding Systems of Marmosets and Tamarins:
Ecology, Phylogeny and Mechanism},
Series = {Abstracts-XVIth Congress of the International Primatological
Society & XIXth Conference of the American Society of
Primatologists, Madison, Wisconsin #054},
Year = {1996},
Key = {fds28314}
}
@article{fds28315,
Author = {Digby, L.J. and Ferrari, S.F. and Castro, A.A.J.F.},
Title = {Preliminary records of common marmosets (Callithrix jacchus)
from Parque Nacional de Sete Cidades, Piauí,
Brazil},
Journal = {. American Journal of Physical Anthropology},
Volume = {Supplement 22},
Pages = {97},
Year = {1996},
Key = {fds28315}
}
@article{fds28316,
Author = {Digby, L.J. and C.E. Barreto},
Title = {Activity and ranging patterns in the common marmoset
(Callithrix jacchus)},
Journal = {American Journal of Primatology},
Volume = {36},
Number = {2},
Pages = {120},
Year = {1995},
Key = {fds28316}
}
@article{fds28317,
Author = {L.J. Digby},
Title = {Infanticide, infant care, and female reproductive strategies
in a wild population of common marmosets},
Journal = {American Journal of Physical Anthropology},
Volume = {Supplement 18},
Pages = {80-81},
Year = {1994},
Key = {fds28317}
}
@article{fds28318,
Author = {L.J. Digby},
Title = {Mating systems and sexual behavior in a wild population of
the common marmoset (Callithrix jacchus)},
Series = {Animal Behavior Society Abstracts, 30th Annual
Meeting},
Pages = {26},
Publisher = {University of California, Davis},
Year = {1993},
Key = {fds28318}
}
@article{fds28319,
Author = {Barreto, C.E. and M.F. Arruda and D.P. Santee and L.
Digby},
Title = {Dados preliminares sobre a marcação de cheiro no sagüi
comum (Callithrix jacchus) e sua relação com o uso de goma
em ambiente natural},
Series = {: I Encontro Cientifico do Programa de Pos-Graduação em
Psicobiologia},
Pages = {13},
Publisher = {Universidade Federal do Rio Grande do Norte,
Brazil},
Year = {1993},
Key = {fds28319}
}
@article{fds28320,
Author = {L.J. Digby},
Title = {Intruders in the wild: intergroup encounters in a natural
population of Callithrix jacchus},
Series = {Abstracts of the XIVth Congress of the International
Primatological Society},
Pages = {293},
Publisher = {Strasbourg, France},
Year = {1992},
Key = {fds28320}
}
@article{fds28321,
Author = {Ferrari, S.F. and L.J. Digby},
Title = {Wild Callithrix groups: stable extended families?},
Series = {Abstracts of the XIVth Congress of the International
Primatological Society},
Pages = {125},
Publisher = {Strasbourg, France},
Year = {1992},
Key = {fds28321}
}
@article{fds28322,
Author = {L.J. Digby},
Title = {An experimental test of dispersal choices in Callithrix
jacchus},
Journal = {American Journal of Primatology},
Volume = {20},
Number = {3},
Pages = {185},
Year = {1990},
Key = {fds28322}
}
@article{fds28323,
Author = {Tardif, S. and K. Hyde and L. Digby},
Title = {Social suppression of ovulation in singly-housed common
marmosets},
Journal = {Biology of Reproduction},
Volume = {42},
Pages = {48},
Year = {1990},
Key = {fds28323}
}
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