Incubation of Fishes
The released egg is protected by a fairly tough chorion or egg case. Within this the cytoplasm and yolk are […]
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fishes
Fecundity and Egg Size of Fishes
It is not at all clear why some species have evolved a strategy of producing many small eggs, and others
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Maturation of Fishes
Vertebrates of both sexes possess a germinal epithelium consisting of germ and somatic cells. The gonads are mesodermal in origin
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Food Capture by Fishes
According to Karel Liem (1980) most of the enormous variety and range of foods eaten by fishes is obtained through
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Digestive Enzymes of Fishes
Like other animals, fish possess an array of digestive enymes by which large macromolecular nutrients are broken down into smaller
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Foods and Characteristic Adaptations of Fishes
The vast majority of living fishes are predatory. Of some 1100 species of extant elasmobranchs, only 13 (1.2%) – the
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The Digestive Tracts of Fishes
The digestive tract of fishes is divided into four regions: the foregut (esophagus and stomach, if present), mid-gut, hindgut, and
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Teeth of Fishes
Living Agnathan fishes possess conical, rasping tooth-like structures made of keratin, the same structural protein found in human hair and
Food Choices of Fish
But optimal foraging strategies may not remain identical throughout an organism’s lifespan and many species exhibit a trophic ontogeny or
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The Osmotic Problem of Fishes
Different fishes live in waters from almost distilled purity, to hypersaline ponds where they have difficulty keeping below the surface.
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