کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8972214 1104381 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Male territoriality mediates density and sex ratio effects on oviposition in the zebrafish, Danio rerio
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Male territoriality mediates density and sex ratio effects on oviposition in the zebrafish, Danio rerio
چکیده انگلیسی
Skew in the operational sex ratio of a population can have important consequences for mating competition and typically results in differential mating success. Population density can also influence mating behaviour and may interact with the operational sex ratio. We investigated the effects of both density and operational sex ratio on male territoriality and female oviposition in the zebrafish. We manipulated the sex bias in favour of either males or females at two density levels and measured the impact on females of aggression and courtship behaviour by territorial males in terms of egg production. Total egg production increased as a function of the number of females in each of the four treatments. However, mean per capita egg production was lower at high densities. We propose that this effect was due to increased aggression at high densities by territorial males towards rivals, which interrupted female spawning attempts. At high densities, territorial males maintained high rates of aggression regardless of sex bias, but courtship rates were significantly lower in male-biased treatments. We further propose that this response, whereby males constrain courtship in the presence of potential rivals, may be adaptive in the context of sperm competition avoidance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Behaviour - Volume 69, Issue 6, June 2005, Pages 1317-1323
نویسندگان
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