Fishery
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Browsing Fishery by Author "East African Marine Fisheries Research Organization, Zanzibar"
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Item The sea we fish in(1959) Morgans, J.F.C; East African Marine Fisheries Research Organization, ZanzibarMost of us realize that different forms of country such as savannah, swamp and forest, harbour different animals and that they move about or,perhaps, change their behaviour 3S their climate changes during the year. The same is true for fishes in the sea. Fishermen know that some sorts inhabit coral reefs, where as others are typically found over sandy bottoms and yet others in open water. But so far as the sea is concerned, little is known of the seasonal changes in the underwater climate off East Africa and of the effects of these changes on the fishes.Item Sharks of the western Indian Ocean I - Loxodon macrorhinus M.& H.(1959) Wheeler, J.F.G.; East African Marine Fisheries Research Organization, ZanzibarThis paper is the first of a series intended to assist in the identification of the sharks of the East African coast, where many different species are caught but very little is known about them.Item Sharks of the Western Indian Ocean I —Loxodon Macrorhinus M. & H.(1959) Wheeler, J.F.G.; East African Marine Fisheries Research Organization, ZanzibarThis paper is the first of a series intended to assist in the identification of the sharks of the East African coast, where many different species are caught but very little is known about them. There are some easily recognised forms like the tiger shark, the man-eater and the hammerheads, but the majority are "typical" sharks possessing few distinguishing characters. The difficulties of identification are many. It is seldom possible to make direct comparison between fresh specimens of a variable species or even of specimens of similar appearance which are actually of different species. Far less are there chances of comparing one's own material with the types or with specimens whose descriptions have been published. The literature is scanty to say the least, and the original works are hard to come by. Most of the recorded descriptions are based on single specimens, and as changes in proportion occur with growth these descriptions are often misleading, those of adults not being necessarily applicable to juveniles and vice versa. The size reached at sexual maturity is taken as a general rule to be about the full stature of the species. But growth in the sea is not limited by all the factors that control the size of land animals, and there is, as far as I know, no proof of the cessation of grow thafter maturity.Item Sharks of the Western Indian Ocean-II Triaenodon Obesus (Ruppell)(1960) Wheeler, J.F.G.; East African Marine Fisheries Research Organization, ZanzibarTriaellodoll obesus was first described by Riippell in 1835 (as Carcharias obesus) from specimens up to 3+ ft. in length (1,070 mm.) that he collected at Djetta on the Red Sea. It has since been recorded at a number of localities in the tropical Indian and Pacific Oceans, those of former including the Seychelles (Playfair, 1867), Madagascar (Sauvage, 1891), India (Day, 1889) and the Chagos Archipelago (Wheeler and Ommanney, 1953), but, curiously enough, it has not been observed until recently in Zanzibar or among the fishes of East Africa (Playfair and Gunther, 1866. Copley, 1952), nor does it range to the south far enough to be included among the fishes of southern Africa (Barnard, 1927, Smith, 1949).
