SAMPLING OF WASTE DUMPSITE AT OLD STADIUM ROAD, UYO AND EFFECTS OF FAUNA, FLORA OF THEIR ENVIRONMENT
Introduction
Migration journeys one widespread throughout the animal kingdom (Dingle and Drake, 2007). Most migration occurs for the purpose of food gathering, reproduction or adjustment to temperature and sometimes referred to simply as feeding, breeding and wintering migration respectively (Barton, 2007). Reasons advanced by (Binder et al, 2007) include variability in habitat condition or the changing need of a population itself. According to (Bond, 1996), migration enables fish to take advantage of additional habitat and to avoid adverse conditions. The objective of this work is the review of migratory activities in fishes, it’s important and effect.
In many fishes migration takes place in an annual basis but in others, individuals are involve in certain changes of habitat only at certain developmental stages. Other migration are of diurnal nature, such as vertical or tidal migration of mesopelagic fishes in the deep layer (Barton, 2007), (Lucas and Batley, 1996) reported the movement of inland fish species to substantial distance within water ways for reproduction. Radio tagging studies have reported migration to natal spawning ground to range between 100 km and 300 km (Lucas and Baras, 2001). Migratory habits of fishes may vary with latitude; the three – spine stickle back (Gastrosteus aculeatus) is marine in the cold waters of north but to the south, it becomes predominantly a fresh water dweller (Lagler et al, 1977)
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