A comparative study of litter size and sex composition in a large dataset of callitrichine monkeys

Autor: Monika Burns, Suzette D. Tardif, Sara Sullivan, Peter Galbusera, David Haig, Dominic Wormell, Sheila Wojciechowski, Jacqui Hooper, Simon Eyre, Miranda Stevenson, Amanda Embury, Arun Idoe, Mark Warneke, Judith M. Burkart, Agustín López Goya, Marcos Peromingo Quesada, Dakota E. McCoy, Jennifer Mickelberg, Jennifer Kotler, Brett M. Frye
Přispěvatelé: University of Zurich, McCoy, Dakota E
Rok vydání: 2019
Předmět:
10207 Department of Anthropology
0106 biological sciences
Litter (animal)
Evolution
sibling competition
Longevity
Zoology
Leontopithecus chrysomelas
010603 evolutionary biology
01 natural sciences
Article
Species Specificity
Behavior and Systematics
callitrichine
Animals
Laboratory
biology.animal
Animals
0501 psychology and cognitive sciences
Leontopithecus chrysopygus
Sex Ratio
050102 behavioral science & comparative psychology
Leontopithecus rosalia
Ecology
Evolution
Behavior and Systematics
Ecology
birth sex ratio
studbook
biology
Callimico goeldii
300 Social sciences
sociology & anthropology
Reproduction
05 social sciences
biology.organism_classification
Callithrix
Saguinus oedipus
1105 Ecology
Evolution
Behavior and Systematics
Callitrichinae
Animals
Zoo
Animal Science and Zoology
1103 Animal Science and Zoology
litter size
Sex ratio
Zdroj: Am J Primatol
ISSN: 1098-2345
0275-2565
DOI: 10.1002/ajp.23038
Popis: In many birds and mammals, the size and sex composition of litters can have important downstream effects for individual offspring. Primates are model organisms for questions of cooperation and conflict, but the factors shaping interactions among same-age siblings have been less-studied in primates because most species bear single young. However, callitrichines (marmosets, tamarins, and lion tamarins) frequently bear litters of two or more, thereby providing the opportunity to ask whether variation in the size and sex composition of litters affects development, survival, and reproduction. To investigate these questions, we compiled a large dataset of 9 species of callitrichines (n= 27,080 individuals; Callithrix geoffroyi, Callithrix jacchus, Cebuella pygmaea, Saguinus imperator, Saguinus oedipus, Leontopithecus chrysomelas, Leontopithecus chrysopygus, Leontopithecus rosalia, and Callimico goeldii) from zoo and laboratory populations spanning 80 years (1938 to 2018). Through this comparative approach, we found several lines of evidence that litter size and sex composition may impact fitness. Singletons have higher survivorship than litter-born peers and they significantly outperform litter-born individuals on two measures of reproductive performance. Further, for some species, individuals born in a mixed-sex litter outperform isosexually-born individuals (i.e., those born in all-male or all-female litters), suggesting that same-sex competition may limit reproductive performance. We also document several interesting demographic trends. All but one species (Cebuella pygmaea) has a male-biased birth sex ratio (BSR) with higher survivorship from birth to sexual maturity among females (although this was significant in only two species). Isosexual litters occurred at the expected frequency (with one exception: Cebuella pygmaea), unlike other animals, where isosexual litters are typically over-represented. Taken together, our results indicate a modest negative effect of same-age sibling competition on reproductive output in captive callitrichines. This study also serves to illustrate the value of zoo and laboratory records for biological inquiry.
Databáze: OpenAIRE
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