Introduction to aquaculture
No hay miniatura disponible
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
Descripción
Man, while he ‘domesticated’ many animals and plants, left the fish out - the carps and the trouts are relatively very recent attempts. The neglect of fish was perhaps mainly owing to man's unfamiliarity with the watery environment; what is under water is not easily seen as well. Man could commune with his terrestrial cohabitants and make them his pets and beasts of burden. He could watch his land live-stock and easily recognize a sick cow or chicken. Even when an attempt is made to learn how th e fish performed he could not comprehend it easily. The air he breathes is so thin, same as that for the cow and the chicken, whereas the water used for breathing by fish is so heavy and contains so little of oxygen, that man could not feel the “pains” of the fish to extract the life giving gas, which looms as it were as the perennial risk of the denizens of water.