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- W1978959952 abstract "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." @default.
- W1978959952 created "2016-06-24" @default.
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- W1978959952 date "2012-10-04" @default.
- W1978959952 modified "2023-10-02" @default.
- W1978959952 title "Body Size Correlates with Fertilization Success but not Gonad Size in Grass Goby Territorial Males" @default.
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- W1978959952 doi "https://doi.org/10.1371/journal.pone.0046711" @default.
- W1978959952 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3464255" @default.
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