The Eel: Biology and Management of Anguillid Eels - Brossura

Tesch, F.

Brossura

ISBN 10: 9400957637 ISBN 13: 9789400957633

Casa editrice: Springer Nature, 2011

Riassunto

by Dr P .H. Greenwood British Museum (Natural History), London Dr Tesch's wide ranging account of anguillid eels impinges on the interests of many biologists; it is not simply a specialized tome narrowly aimed at ichthyologists and fishery scientists, rather it provides a source of primary reference and a comprehensive sununary of informa­ tion that is not likely to be superseded for a long time. It is significant that the bibliography includes references to learned journals concerned with physiology, pharmacology, taxonomy, genetics, zoology, endo­ crinology, botany, ecology and environmental interactions. Such is the breadth of interest in the Anguillidae. Few fish species have been subjected to as detailed review as Dr Tesch gives for the (wo Atlantic species of Anguilla. An equally comprehensive resume of research into the fourteen, rather less well-studied Indo­ Pacific species gives balance and reciprocal illumination to several biological problems posed by these similar but quite distinctive species.

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Contenuti:

1. Body Structure and Functions.- 1.1 Skeleton.- 1.1.1 Skull.- 1.1.2 Pectoral girdle.- 1.1.3 Vertebral column.- 1.1.4 Fins.- 1.2 Skin and musculature.- 1.2.1 Structure and function of the skin.- 1.2.2 Scales.- 1.2.3 Pigmentation.- 1.2.4 Teeth.- 1.2.5 Musculature.- 1.3 Respiratory organs and swimbladder.- 1.4 Feeding and organs of digestion.- 1.4.1 The gastrointestinal tract.- 1.4.2 Pancreas.- 1.4.3 Liver and gall bladder.- 1.5 Circulation of the blood.- 1.5.1 Cardiovascular system.- 1.5.2 Blood.- 1.6 Urinogenital system.- 1.6.1 The kidneys.- 1.6.2 The gonads.- 1.7 The endocrine system.- 1.7.1 The pituitary gland.- 1.7.2 The thyroid gland.- 1.7.3 The urohypophysis.- 1.7.4 The interrenal tissue (adrenocortical homologue).- 1.7.5 Ultimobranchial bodies.- 1.7.6 Corpuscles of Stannius.- 1.7.7 Thymus gland.- 1.7.8 The kidney.- 1.8 Nervous system and sense organs.- 1.8.1 The brain.- 1.8.2 Eye.- 1.8.3 Olfaction.- 1.8.4 Hearing and the lateral line sense organs.- 2. Eel Species, their Developmental Stages and their Distribution.- 2.1 The European and American eels A. anguilla and A. rostrata.- 2.1.1 Spawning grounds and larval forms.- 2.1.2 Continental distribution.- 2.2 Indo-Pacific species.- 2.2.1 The south-east African region: A. marmorata, A. nebulosa labiata, A. mossambica and A. bicolor.- 2.2.2 The temperate north Pacific zone: The Japanese eels A. japonica and A. marmorata.- 2.2.3 The south-east Pacific species from the temperate zone: A. australis and A. dieffenbachi.- 2.2.4 The tropical eels A. celebesensis, A. megastoma, A. interioris, A. ancestralis, A. nebulosa, A. marmorata, A. reinhardti, A. borneensis, A. bicolor, A. obscura.- 2.3 Zoogeographical relationships.- 3. Post-Larval Ecology and Behaviour.- 3.1 The glass eel and elvers : their migration on the Continental shelf and into freshwaters.- 3.1.1 Migration in the sea.- 3.1.2 The movement into freshwater.- 3.1.3 Human intervention.- 3.2 Migration of pigmented young eels.- 3.2.1 Dependence on environmental factors.- 3.2.2 Human involvement in the ascent of young eels.- 3.3 The ‘Yellow eel’ stage to the ‘Silver eel’ stage.- 3.3.1 Feeding.- The period of activity and food intake—Seasonal variations in diet—Choice of food and body size—Choice of food and head width—The dependence of diet on food availability—Choice of food.- 3.3.2 Age and growth.- Methodological problems—Differences in growth between males and females and the age and length at which migration begins—Head width and growth—Differences in growth due to environmental factors—Interspecific differences in growth—Theoretical pattern of growth—Length and weight.- 3.3.3 Location, habitat and behaviour patterns.- Refuge in tubes and hollows, and contact with members of the same species—Water depth—Survival in air—Localization and homing.- 3.4 Silver eel migration.- 3.4.1 Seasonal variation.- 3.4.2 Variations in the time of day, and the influence of light.- 3.4.3 Correlation with lunar phases.- 3.4.4 Hydrological and meteorological factors.- Low pressure areas—Water level and currents in rivers—Tidal currents—Wind and currents—Temperature and depth—Salinity.- 3.4.5 In subterranean waters.- 3.4.6 In the sea, with special reference to the Baltic.- 3.4.7 Behaviour and speed.- 4. Fishing Yields.- 4.1 The development of eel fisheries.- 4.2 Annual and regional fluctuations in yield.- 4.2.1 Variations over the whole North Sea region.- 4.2.2 The effect of differing proportions of males and females on variations in catch size along the southern coast of the Baltic and in inland waters.- 4.2.3 The relationship between the west wind and glass eel invasions.- 4.2.4 The influence of seasonal temperature levels.- 4.2.5 Catch variations in Canada.- 4.3 Variation in catch size throughout the year.- 4.4 Population density and catch sizes from an economic and ecological viewpoint.- 4.4.1 Regional differences.- 4.4.2 The eel in competition with other fishes and with crustaceans.- 4.4.3 Improving yields by stocking.- 4.4.4 Summary of yield and stocking success.- 5. Fishing Methods.- 5.1 Eel traps.- 5.1.1 Eel baskets.- 5.1.2 Fyke nets.- 5.1.3 Pound nets.- 5.2 Stow nets.- 5.2.1 Staked stow nets.- 5.2.2 Anchored stow nets.- 5.2.3 Otterboard stow net.- 5.3 Permanent eel traps.- 5.3.1 Eel weirs in rivers.- 5.3.2 Eel traps in streams and rivers.- 5.4 Seines and trawls.- 5.5 Angling and line fishing.- 5.6 Lift nets, spears and other equipment.- 5.7 The use of electricity.- 5.8 Combination with light.- 6. Eel Culture and Live Storage.- 6.1 Eel farming in Japan.- 6.1.1 The importance of eel farming.- 6.1.2 Pond systems and yields.- 6.1.3 Rearing techniques.- 6.1.4 Feeding.- 6.1.5 Profit and expenditure.- 6.2 Experiments on eel farming in Europe.- 6.3 Live storage.- 7. Diseases, Parasites and Injuries.- 7.1 Virus and bacterial diseases.- 7.1.1 Cauliflower disease.- 7.1.2 Fresh-and saltwater eel diseases Freshwater eel disease—Saltwater eel disease.- 7.2 Infestation by fungi, protozoa and metazoa.- 7.3 Teratological and other defects.- 8. Trade and Processing.- 8.1 International trade.- 8.2 Prices.- 8.3 Quality.- References.

Su questa edizione

• Editore: Springer Nature
• Data di pubblicazione: 2011
• ISBN 10: 9400957637
• ISBN 13: 9789400957633
• Rilegatura: Copertina flessibile
• Numero di pagine: 452