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![]() Παράθεση:
Variations caused by normal shifts in melanophores in Bettas are shown in Figure 3. These might be divided into a light, or quiescent, phase and a dark, or excited, phase. Certain patterns are normally associated with these phases. Usually, both sexes show longitudinal striping, the stripes being formed by alternating regions of dense and sparse dark pigment cells. 'When the fish are in certain physiological states they may darken somewhat, through expansion of pigment in other cells, until they appear uniformly colored. In display condition, males become very dark, almost black and appear to lose any sign of a striped or banded pattern. ..females in this condition usually show a series of alternating transverse light and dark bands which have been associated with a submissive condition as when they are ready to spawn. On rare occasions the transverse banding is shown by males, especially if they have been bested in a fight. Lucas G.A., 1968. A study of variation in the Siamese Fighting Fish, Betta splendens, with emphasis on color mutants and the problem of sex determination. PhD Dissertation, Iowa State University. http://lib.dr.iastate.edu/cgi/viewco...88&context=rtd Οπότε, αν το ψάρι δε διαθέτει μελανοφόρα, τότε δε θα είναι ορατές οι γραμμές. |
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