Download or read book cologie ichtyologie zoologie et protection des v g taux au Sahel written by and published by . This book was released on 2007 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Chilwa written by M. Kalk and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leonard C. Beadle In contrast to the more sta bie oceans, inland waters are, on the geological time scale, short-lived and are subject to great fluctuations in chemical composition and physical features. Very few lakes and rivers have existed continuously for more than a million years, and the life of the majority is to be measured in thousands or less. Earth movements, erosion and long-term climatic changes in the past have caused many of them to appear and disappear. No wonder then that most freshwater organism are especially adapted to great changes and many even to temporary extinction of their environment. Recent studies of residual sediments from existing and extinct lakes in tropical Africa have told us much about their age and the past history of their faunas and floras, from which we may deduce something about the climate and the conditions in the water in the past. The forces that have formed and moulded the African Great Lakes have been catastrophic in their violence and effects. They are not yet finished, but the present rate of change is, in human terms, too slow for direct observation of the ecological effects. The large man-made lakes are providing very good opportunities for studying the chemi cal and biological consequences of the initial filling but, once filled, they are artificially protected against major fluctuations.
Download or read book South African Red Data Book written by Paul Harvey Skelton and published by . This book was released on 1987 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Status of Fisheries and Fish Stocks of the Four Largest African Reservoirs written by R. C. M. Crul and published by Food & Agriculture Org.. This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Checklist of the Parasites of Fishes of the Philippines written by James Richard Arthur and published by Food & Agriculture Org.. This book was released on 1997 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This checklist summarizes information on the parasites of Philippine fishes contained in the world literature dating from the earliest known record (de Blainville 1822) to the end of 1996. Information is presented in the form of parasite-host and host-parasite lists. Included are 201 named species of parasites, distributed among the higher taxa as follows: Apicomplexta - 1, Ciliophora - 16, Mastigophora - 2, Microspora - 1, Myxozoa - 9, Trematoda - 90, Monogenea - 22, Cestoda - 6, Nematoda - 20, Acanthocephala - 5, Mollusca - 1, Branchiura - 2, Copepoda - 21 and Isopoda - 5. Also included are many records of parasites not identified to species level. Parasites have been reported from 172 of the more than 2030 species of marine and freshwater fish occurring in Philippine waters, and from another 17 species of freshwater aquarium fish examined in the Philippines but not found in natural waters. The Parasite-Host List is organized on a taxonomic basis and provides information for each parasite species on the environment (fresh water, brackish water, marine), the location (site of infection) in or on its host(s), the species of host(s) infected, the known geographic distribution (by island) in the Philippines, and the published sources for each host and locality record. The Host-Parasite List is organized according to the taxonomy of the hosts, and includes for each host, the English language and local (typically Tagalog) common names, environment (fresh water, brackish water, marine), status in the Philippines (native or exotic), and information on the known Philippine distribution of the parasites. Both lists are accompanied by remarks and footnotes, as warranted, giving specific information on points of systematics, nomenclature, possible misidentifications, introductions, pathogenicity, etc. Citations are included for all references and a supplementary list of references contains other literature on Philippine fish parasites. Parasite and host indices are included. The following new taxonomic combinations are made: Prosorhynchoides philippinorum (Velasquez, 1959) n. comb., for Bucephaloides philippinorum Velasquez, 1959; Prosorhynchoides sibi (Yamaguti, 1940) n. comb., for Bucephaloides sibi (Yamaguti, 1940); Genolinea awa (Yamaguti, 1965) n. comb., for Pseudobunocotyla awa Yamaguti, 1965; and Procamallanus (Spirocamallanus) philippinensis (Velasquez, 1980) n. comb., for Spirocamallanus philippinensis Velasquez, 1980.
Download or read book Endemic Fish Diversity of Western Ghats written by A. G. Ponniah and published by . This book was released on 2000 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the Workshop on Germplasm Inventory and Genebanking of Freshwater Fishes, held at Central Marine Fisheries Research Institute, Cochin, India in 1998; organized by National Bureau of Fish Genetic Resources.
Download or read book Mala i Cichlids in Their Natural Habitat written by Ad Konings and published by . This book was released on 2007 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of River Systems written by Bryan R. Davies and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of the ecology of running waters has come a long way during the past few years. From being a largely descriptive subject, with a few under tones concerned with such things as fisheries, pollution or control of blackflies, it has evolved into a discipline with hypotheses, such as the River Continuum Concept (Vannote et a/. 1980), and even a book suggesting that it offers opportunity for the testing of ecological theory (Barnes & Minshall 1983). However, perusal of the literature reveals that, although some of the very early studies were concerned with large rivers (references in Hynes 1970), the great mass of the work that has been done on running water has been on streams and small rivers, and information on larger rivers is either on such limited topics as fisheries or plankton, scattered among the journals, or not available to the general limnologist. The only exceptions are a few books in this series of publications, such as those on the Nile (Rz6ska 1976), the Volga (Morduckai Boltovskoi 1979) and the Amazon {Sioli 1984), and the recent compendium by Whitton (1984) on European rivers, among which there are a few that rate as large.
Download or read book Fishes of Laos written by Maurice Kottelat and published by . This book was released on 2001 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dr Axelrod s Mini atlas of Freshwater Aquarium Fishes written by Herbert R. Axelrod and published by TFH Publications. This book was released on 1987 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlas of freshwater fishes and aquarium fishes.
Download or read book Introduced Species in Fisheries and Aquaculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org. This book was released on 2006-11-30 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Contains guidelines, codes of practice, international instruments, publications and considerations that will facilitate responsible use and control of introduced species. A main feature is the Database on Introductions of Aquatic Species (DIAS) that contains over 5,000 records of international introductions of aquatic species."--Container.
Download or read book The Fishes of Zimbabwe written by Graham Bell-Cross and published by . This book was released on 1988 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Guide to the Freshwater Fishes of New Guinea written by Gerald R. Allen and published by . This book was released on 1991 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cichlid Fishes written by M.H. Keenleyside and published by Springer Science & Business Media. This book was released on 1991-05-31 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cichlid fishes are an important group, being widely used in scientific research and as popular fish with aquarists. This group contains mainly small species which adjust quickly to captivity, exhibiting a readiness to breed and long periods of parental care for the young. This books comprehensive volume describes the current knowledge on the behaviour and ecology of the cichlid fishes.
Download or read book Fish Diseases and Disorders Non infectious disorders written by John F. Leatherland and published by Oxford University Press, USA. This book was released on 1998 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book follows on from the first volume, on protozoan and metazoan infections, of a three-volume series. It focuses largely on finfish and considers non-infectious disorder of development, growth and physiology of wild and captive species. Various sections address topics such as tumourigenesis, stress physiology and the effects of stressors on particular processes, and the effect of environmental factors (including toxic substances) on fish health. The economic implications of non-infectious disorders in intensive aquaculture are of particular importance, and a chapter is devoted specifically to this. The final chapter describes evaluation methods for the assessment of disorders at the individual, population and community level. The book is indispensable for zoologists, veterinary scientists and those concerned with fisheries and aquaculture.
Download or read book UCN red list of threatened animals 1994 written by Brian Groombridge and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains the following lists - threatened species; extinct species; threatened genera; threatened and extinct subspecies; commercially threatened.
Download or read book Tilapia written by John Dominic Balarin and published by . This book was released on 1979 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
