A comparison of paternity data and relative testes size as measures of level of sperm competition in the<scp>H</scp>ominoidea

Baker, R. Robin; Shackelford, Todd K.

doi:10.1002/ajpa.23360

Cited by 12 publications

(27 citation statements)

References 96 publications

(226 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The procedures and equations used here to calculate sperm competition level from paternity data were developed, described, and discussed by Baker and Shackelford (). Only a summary of the main features is provided here.…”

Section: Methodsmentioning

confidence: 99%

“…None of the values of OMP % for individual studies or study‐groups presented in Table can be considered representative of whole species or even whole subpopulations for two reasons: (1) in most cases the primary data are based on small samples from local subpopulations and (2) none of the primary samples involved structured sampling designed to yield data representative of a wider population. We have discussed this issue previously (Baker & Shackelford, ) and there employed such corrective procedures as possible whenever these could lead to a reduction in sampling bias.…”

Section: Methodsmentioning

confidence: 99%

“…The hypothesis to be tested for the Cercopithecoidea in this article is the same as that tested previously for the Hominoidea (Baker & Shackelford, ). It is that paternity data, as processed here, can provide a measure of sperm competition that is at least as useful as relative testes size.…”

Section: Introductionmentioning

confidence: 94%

“…Recently, we argued (Baker & Shackelford, ) that a third source of information, paternity data, may generate more than just a proxy measure of sperm competition level. We developed a procedure and formulae that allowed the direct calculation of sperm competition level in terms of males per conception (i.e., the number of males that have sperm present in a female's ampulla at conception).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Paternity data and relative testes size as measures of level of sperm competition in the Cercopithecoidea

Baker

Shackelford

2018

American J Primatol

Self Cite

View full text Add to dashboard Cite

Historically, the empirical study of the role of sperm competition in the evolution of sexual traits has been problematic through an enforced reliance on indirect proxy measures. Recently, however, a procedure was developed that uses paternity data to measure sperm competition level directly in terms of males/conception (i.e., the number of males that have sperm present in a female's ampulla at conception). When tested on apes and humans (Hominoidea) this measure proved not only to correlate significantly with the traditionally used measure of relative testes size but also to offer a number of advantages. Here we provide a second test of the procedure, this time using paternity data for the Old World monkeys (Cercopithecoidea). We calculate sperm competition levels (males/conception) for 17 species of wild and free-ranging cercopithecoids and then analyze the data against measures of relative testes size.Calculated sperm competition levels correlate strongly with relative testes size both with and without phylogenetic control at both the species and generic levels. The signal-to-noise ratios inherent in both the past measure of relative testes size and the new measure of sperm competition level from paternity data are discussed. We conclude that although both measures are appropriate for the future study of the role of sperm competition in the evolution of sexual traits, when paternity data are available they provide the more direct and meaningful analytical tool. Not least, they potentially allow a first empirical analysis of the role of sperm competition in the evolution of relative testes size that could then be compared with the wealth of theoretical analyses that already exist.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Paternity data and relative testes size as measures of level of sperm competition in the Cercopithecoidea

Baker

Shackelford

2018

American J Primatol

Self Cite

View full text Add to dashboard Cite

show abstract

“…Baker and Shackelford () reviewed published primate genetic field studies to produce independent support for the use of testes size as a proxy measure for sperm competition while also advancing a more accurate formula derived directly from paternity data. Nunn and Samson () examined sleep characteristics of primates in the Phylogeny of Sleep database, finding that humans sleep considerably less than expected given their phylogeny and social and environmental ecologies.…”

Section: New Discoveries From Old Datamentioning

confidence: 99%

Biological Anthropology in 2018: Grounded in Theory, Questioning Contexts, Embracing Innovation

Martin

2019

American Anthropologist

View full text Add to dashboard Cite

Biological anthropology in 2018 encapsulated what past scholars envisioned for its future: a multidisciplinary approach to understanding human and nonhuman primate evolution and diversity using the most innovative techniques and rigorous standards available. This year also built on a tradition of introspection about what biological anthropology encompasses and by whom and how it is conducted. This review highlights research and movements in the field that reflect both of these pursuits. Studies drew on evolutionary theory to generate novel insights into human and nonhuman primate biology, behavior, and organization. Studies on hominin evolution and human biology have upended previous understandings by revealing more dynamic and context-dependent processes in our ancestry and phenotypic expressions. Across subdisciplines, biological anthropologists have advanced the use of new technologies and analytical techniques and begun to promote open, transparent, and reproducible science among a more diverse community of researchers. [year in review, evolutionary anthropology, context and variation, emerging technologies, transparent methods, researcher diversity] RESUMEN La biología antropológica en 2018 encapsuló lo que investigadores anteriores imaginaron para su futuro:una aproximación multidisciplinaria para entender la evolución de primates humanos y no humanos y diversidad utilizando las técnicas más innovadoras y los estándares rigurosos disponibles. Este año también desarrolló sobre una tradición de introspección acerca de lo que la antropología biológica abarca y por quién y cómo es llevada a cabo. Esta revisión resalta la investigación y los movimientos en el campo que reflejan estas búsquedas. Los estudios se basaron en la teoría evolucionaria para generar nuevos conocimientos en la biología de primates humanos y no humanos, comportamiento y organización. Los estudios sobre la evolución de los homíninos y la biología humana han cambiado drásticamente entendimientos previos al revelar procesos más dinámicos y dependientes del contexto en nuestra ascendencia y expresiones fenotípicas. A través de las subdisciplinas, los antropólogos biológicos han avanzado el uso de nuevas tecnologías y técnicas analíticas y empezado a promover una ciencia abierta, transparente y reproducible entre una comunidad más diversa de investigadores. [año en revisión, antropología evolucionaria, contexto y variación, tecnologías emergentes, métodos transparentes, diversidad de investigadores] T he history of biological anthropology has been underscored by attempts to properly situate the field in relation to other natural sciences and the discipline of anthropology as a whole (e.g., Calcagno

show abstract

Hominoidea Morphology

MacLatchy¹,

Orlikoff²,

Cosman³

2021

Encyclopedia of Animal Cognition and Behavior

View full text Add to dashboard Cite

A comparison of paternity data and relative testes size as measures of level of sperm competition in theHominoidea

Abstract: This alternative measure based on paternity data has a number of advantages. Not only is it a potentially direct measure of the level of sperm competition but it also allows the roles of frequency and intensity to be studied separately when of interest.

Cited by 12 publications

References 96 publications

Paternity data and relative testes size as measures of level of sperm competition in the Cercopithecoidea

Paternity data and relative testes size as measures of level of sperm competition in the Cercopithecoidea

Biological Anthropology in 2018: Grounded in Theory, Questioning Contexts, Embracing Innovation

Hominoidea Morphology

Contact Info

Product

Resources

About