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Sperm Morphology in Neotropical Primates.


ABSTRACT: The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: Alouatta caraya, Ateles belzebuth and Ateles chamek of family Atelidae; and Cebus cay (=Sapajus cay) and Cebus nigritus (=Sapajus nigritus) of family Cebidae. After the collection of semen samples, the following parameters were measured on 100 spermatozoa from each specimen: Head Length, Head Width, Acrosome Length, Midpiece Length, Midpiece Width and Tail Length. Considering the available literature on sperm morphometry, we gathered data of 75 individuals, from 20 species, 8 genera and 2 families. These data were superimposed on a phylogeny to infer the possible direction of evolutionary changes. Narrower and shorter spermatozoa seem to be the ancestral form for Cebidae, with a trend toward wider and larger heads in derived groups. The spermatozoa of Atelidae may show an increase in total length and midpiece length. Sperm heads would have become narrower in the more derived groups of Ateles. Sperm length may increase in the more derived species in both families. Our results are discussed in the context of sperm competition and sexual selection.

SUBMITTER: Steinberg ER 

PROVIDER: S-EPMC6827008 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Sperm Morphology in Neotropical Primates.

Steinberg Eliana R ER   Sestelo Adrián J AJ   Ceballos María B MB   Wagner Virginia V   Palermo Ana M AM   Mudry Marta D MD  

Animals : an open access journal from MDPI 20191021 10


The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: <i>Alouatta caraya</i>, <i>Ateles belzebuth</i> and <i>Ateles chamek</i> of family Atelidae; and <i>Cebus cay</i> (=<i>Sapajus cay</i>) and <i>Cebus nigritus</i> (=<i>Sapajus nigritus</i>) of family Cebidae. After the collection of semen samples, the following pa  ...[more]

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