Sexual dimorphism of fish
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Ray finned fish are an ancient and diverse class, with the widest degree of sexual dimorphism of any Animal class. Fairbairn notes that. Sexual dimorphism has been Permanently dimorphic or dichromatic fish are always extensively studied both theoretically and comparatively. different in colour.
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Key words: Sexual size dimorphism; life history strategies; sperm competition. smaller, fish show all possible types of sexual dimorphism ranging from dwarf.
Description:The size range of boarfish in the Northeast Atlantic is dominated by specimens of 10—17 cm total length, exhibiting a dimorphic distribution, where larger individuals are exclusively females White et al. In species with asymptotic growth after maturation, like most fishes, this dimorphism arises as a consequence of differences in maturation pattern, growth pattern, asymptotic size, or longevity between sexes Stamps, It is widely distributed from Norway to Senegal, including the Mediterranean, Azores, Canaries, Madeira, and Great Meteor Seamount, can occur in dense shoals, and is primarily found on the shelf and along the shelf edge within a depth range of 40— m Holgersen, ; Tidd and Warnes, ; O'Donnell et al. For all samples, total length L was measured to the nearest millimetre below. They also contribute to the diet of certain fish species Morato et al. The submodels were then compared by likelihood ratio tests using the Akaike Information Criterion AIC , where the models were compared in a hierarchical manner by comparison with the most complex model, following the procedure of Ogle Whether predation mortality differs between sexes is unknown, but since females and males co-occur in shoals throughout the season EDF, pers.