Secondary sex characteristics in a fish
CHAPTER SECONDARY SEXUAL CHARACTERS OF FISHES, AMPHIBIANS, AND REPTILES.
18 Feb Secondary sexual characteristics are features that appear at sexual maturity and distinguish the two sexes of a species. Studies of secondary.
Secondary sex characteristics are features that indicate genetic fitness to the opposite sex, but and the desire for that characteristic in the other sex. Male birds and fish of many species have brighter coloration or other external ornaments.
Description:With the European salmon, according to Mr. As in the case of the Callionymus, the males whilst young resemble the adult females in colour and structure. No doubt with the bright green kinds which live in the midst of vegetation, this colour serves to conceal them; and in N. The size of the drumming muscle of males was similar among wild and farmed cod, but farmed females had smaller muscles than their wild counterparts. In an undamaged fin, the longest fin ray is the second fin ray counting in a dorsal to ventral direction, and this was the case with almost no exception in the present study. These secondary sexual characteristics are not used in reproduction, but are apparent in most sexually dimorphic species - species having two forms that are determined by their sex. Hence be is satisfied that one of the uses of the rattle is to bring the sexes together.