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Available Book Titles in Datacenter |
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Robin L. Welcomme. The inland waters of Africa, Rome:FAO, 1972. |
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Robin L. Welcomme. Some general and theoretical considerations on the fish production of African rivers. CIFA Occasional Paper no. 3. Anonymous. Anonymous. Rome:FAO. 3:AL, 1974. FIRI Lib. 1. AL 639.21(6) WEL. |
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Robin L. Welcomme. Symposium on river and floodplain fisheries in Africa. Bujumbura, Burundi, 21-23 November, 1977 ; review and experince papers, Rome:FAO, 1978. |
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Robin L. Welcomme. Fishery management in large rivers, 1979. |
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Robin L. Welcomme. River fisheries, Rome:FAO, 1985. |
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R. L. Welcomme. International introductions of inland aquatic species. FAO Technical Paper No. 294. Anonymous. Anonymous. Rome:FAO. 639.2.04WEL, 1988. FAO Technical Paper No. 294. 639.2.04 WEL. |
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R. L. Welcome. The biological effects of climatic Chanoes on some fishes in the Lake Victoria. A thesis submitted for the degree of Doctor of philosophy at Makerere University College. University of East Africa. Anonymous. Anonymous. 1966. Some effects of climatic change on the biology of fish inhabiting a small stream and a series of lagoons are considered.Rainfall is the principal climatic variable , and the stream undergoes a sequence of floods and droughts corresponding to seasonal changes in intensity.less annual fluctuation is shown by the lagoons which have arisen from longer term variations in rainfall.Characteristic species of fish are found each in habitat.In the stream thses are mainly migratory and appear only at times of spate but in lagoons more permanent populations exist.The number of species inhabiting any lagoon and the size and maturation length of individual fish,are proportional to the degree of isolation. |
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The andromous fish breed only during the rains and experiments indicate that the later stages of ripening take place during migration in the river.Adults are generally absent from the stream at other times but the young are found in the upstream swamps where they grow and later migrate to the lake at a size characteristic of each species.Inhabitants of the lagoon breed continuosly,but an increase in intensity occurs at least for one species during wet months. |
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Little change in diet takes place when fish migrate and they generally feed throughout the breeding period.The condition factor of fish from the river alters at the length at which juveniles move to the adult habitat;there is no such alteration in the lagoon fish |
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The principal biolgical effect of short term climatic change is the migration and brreding of anadromous fish during spate.The longer term climatic changes have created new environment which have stimulated the increase of the introduced species Tilapia leucosticta. Populations in this species and Haplochromic nubilus show stunting which is related to the degree of isolation of the lagoon from the lake. FIRRI LIBRARY. PHD. PHD 551.5(676)WEL. |
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Paul S. Welch. Limnology. McGraw-Hill Publications in the Zoological Sciences. Anonymous. Anonymous. New York ; London:McGraw Hill Book Company, Inc. 556.55 WEL, 1935. FIRI LIB. 1. |
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Paul S. Welch. Limnological methods, Philadelphia:The Blakiston Company, 1948. |
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Paul S. Welch. Limnological methods, Philadelphia, Toronto:The Blakiston Company, 1955. |
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Weis and Erich. The new Schoffler-Weils compact German & English dictionary, London:George G: Harrap & co LTD, 1968. |
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Wegoye J and Kaidhiwa M. Economic viability of the fishing enterprises to improve the income condition of artsanal fishermen., Jinja:NARO/ FIRRI, 2002. |
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Nigel Webb and Roger Blackmore. Statistics for biologists, Cambridge:Cambridge University Press, 1985. |
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Weatherley A.H. Growth and ecology of fish populations, London:Academic press, 1972. |
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Weatherley A.H. Growth and ecology of fish populations, London;New York:Academic press, 1972. |
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A. H. Weatheley and H. S. Gill. The biology of fish growth, London;Orlando:Academic Press, 1987. |
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kenneth E. F. Watt. Systems analysis in ecoogy, New York ; London:Academic Press, 1966. |
