Cargando…
Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males
In fish species with alternative male mating tactics, sperm competition typically occurs when small males that are unsuccessful in direct contests steal fertilization opportunities from large dominant males. In the grass goby Zosterisessor ophiocephalus, large territorial males defend and court fema...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2012
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3464255/ https://www.ncbi.nlm.nih.gov/pubmed/23056415 http://dx.doi.org/10.1371/journal.pone.0046711 |
_version_ | 1782245394924699648 |
---|---|
author | Pujolar, Jose Martin Locatello, Lisa Zane, Lorenzo Mazzoldi, Carlotta |
author_facet | Pujolar, Jose Martin Locatello, Lisa Zane, Lorenzo Mazzoldi, Carlotta |
author_sort | Pujolar, Jose Martin |
collection | PubMed |
description | In fish species with alternative male mating tactics, sperm competition typically occurs when small males that are unsuccessful in direct contests steal fertilization opportunities from large dominant males. In the grass goby Zosterisessor ophiocephalus, large territorial males defend and court females from nest sites, while small sneaker males obtain matings by sneaking into nests. Parentage assignment of 688 eggs from 8 different nests sampled in the 2003–2004 breeding season revealed a high level of sperm competition. Fertilization success of territorial males was very high but in all nests sneakers also contributed to the progeny. In territorial males, fertilization success correlated positively with male body size. Gonadal investment was explored in a sample of 126 grass gobies collected during the period 1995–1996 in the same area (61 territorial males and 65 sneakers). Correlation between body weight and testis weight was positive and significant for sneaker males, while correlation was virtually equal to zero in territorial males. That body size in territorial males is correlated with fertilization success but not gonad size suggests that males allocate much more energy into growth and relatively little into sperm production once the needed size to become territorial is attained. The increased paternity of larger territorial males might be due to a more effective defense of the nest in comparison with smaller territorial males. |
format | Online Article Text |
id | pubmed-3464255 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-34642552012-10-10 Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males Pujolar, Jose Martin Locatello, Lisa Zane, Lorenzo Mazzoldi, Carlotta PLoS One Research Article In fish species with alternative male mating tactics, sperm competition typically occurs when small males that are unsuccessful in direct contests steal fertilization opportunities from large dominant males. In the grass goby Zosterisessor ophiocephalus, large territorial males defend and court females from nest sites, while small sneaker males obtain matings by sneaking into nests. Parentage assignment of 688 eggs from 8 different nests sampled in the 2003–2004 breeding season revealed a high level of sperm competition. Fertilization success of territorial males was very high but in all nests sneakers also contributed to the progeny. In territorial males, fertilization success correlated positively with male body size. Gonadal investment was explored in a sample of 126 grass gobies collected during the period 1995–1996 in the same area (61 territorial males and 65 sneakers). Correlation between body weight and testis weight was positive and significant for sneaker males, while correlation was virtually equal to zero in territorial males. That body size in territorial males is correlated with fertilization success but not gonad size suggests that males allocate much more energy into growth and relatively little into sperm production once the needed size to become territorial is attained. The increased paternity of larger territorial males might be due to a more effective defense of the nest in comparison with smaller territorial males. Public Library of Science 2012-10-04 /pmc/articles/PMC3464255/ /pubmed/23056415 http://dx.doi.org/10.1371/journal.pone.0046711 Text en © 2012 Pujolar et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Pujolar, Jose Martin Locatello, Lisa Zane, Lorenzo Mazzoldi, Carlotta Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title | Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title_full | Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title_fullStr | Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title_full_unstemmed | Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title_short | Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males |
title_sort | body size correlates with fertilization success but not gonad size in grass goby territorial males |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3464255/ https://www.ncbi.nlm.nih.gov/pubmed/23056415 http://dx.doi.org/10.1371/journal.pone.0046711 |
work_keys_str_mv | AT pujolarjosemartin bodysizecorrelateswithfertilizationsuccessbutnotgonadsizeingrassgobyterritorialmales AT locatellolisa bodysizecorrelateswithfertilizationsuccessbutnotgonadsizeingrassgobyterritorialmales AT zanelorenzo bodysizecorrelateswithfertilizationsuccessbutnotgonadsizeingrassgobyterritorialmales AT mazzoldicarlotta bodysizecorrelateswithfertilizationsuccessbutnotgonadsizeingrassgobyterritorialmales |