Sterreichs Fischerei
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Sterreichs Fischerei
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Author :
language : de
Publisher:
Release Date : 1994
Sterreichs Fischerei written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Fisheries categories.
Fish Reproduction
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Author : Maria J Rocha
language : en
Publisher: CRC Press
Release Date : 2008-01-01
Fish Reproduction written by Maria J Rocha and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-01 with Science categories.
With the decline in world fish stocks, our knowledge of fish reproduction has become fundamental. Reproduction is an essential commitment to future generation. It is also a continuous development process throughout ontogeny, requiring energetic, ecological, physiological, anatomical, biochemical and endrocrinological adaptations. The first chapters highlight important issues affecting fish normal ways of reproductive development; details would focus on species living in opposite environments, such as tropical and polar fishes; far related, as teleosts and cartilaginous fishes; and finally, fish having different reproductive strategies. Thereafter, since many fishes live in detrimental environments, mainly induced by the continuous input of xenobiotic substances into waterways, the authors found it highly pertinent to include this topic. Herein, the authors fix their attention on the factors and mechanisms that may well affect reproductionrelated hormonal systems as also on known consequences for fish living i
Mittheilungen Des Sterreichischen Fischerei Vereines
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Author : Österreichischer Fischerei-Verein
language : de
Publisher:
Release Date : 1881
Mittheilungen Des Sterreichischen Fischerei Vereines written by Österreichischer Fischerei-Verein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1881 with categories.
F Nfundzwanzig Jahre Sterreichischer Fischerei Verein 1880 1905
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Author : Alfred Günther
language : de
Publisher:
Release Date : 1905
F Nfundzwanzig Jahre Sterreichischer Fischerei Verein 1880 1905 written by Alfred Günther and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1905 with categories.
Sport Fishery Abstracts
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Author :
language : en
Publisher:
Release Date : 1991
Sport Fishery Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Fish culture categories.
Fisheries Review
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Author :
language : en
Publisher:
Release Date : 1990
Fisheries Review written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Fish culture categories.
Ecological Sustainability Of Fish Resources Of Inland Waters Of The Western Balkans
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Author : Vladica Simić
language : en
Publisher: Springer Nature
Release Date : 2023-12-31
Ecological Sustainability Of Fish Resources Of Inland Waters Of The Western Balkans written by Vladica Simić and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-12-31 with Science categories.
This book provides a detailed evaluation of the hydro-ecological characteristics of the Western Balkans, an area characterized by still preserved inland waters and fish resources important for the European continent, as well as the biodiversity of inland waters important for the planet Earth. Freshwater ecosystems cover only 1% of the Earth's surface; however, they are a habitat for about 40% of fish species. At the same time, inland fisheries make less than 12% of the world's global fish catch, with 43% coming from low-income and food-deficient countries (Africa, South America, Southeast Asia). In Europe, the Western Balkans have significant fishing waters and fish resources, including the Middle Danube drainage (Sava, Drina, Velika Morava river systems), large ancient lakes (Skadar/Shkodra, Ohrid, Prespa, Dojran), and the Adriatic basin characterized by endemic and commercially important species. However, in contrast to the high fishing potential in a significant part of the Western Balkans, diverse and specific political, economic, and social factors largely had a negative impact on the state of fish resources. This volume is multidisciplinary and provides a sound knowledge base for scientific and practical fisheries. In addition, it may be a valuable guide for managers and conservationists worldwide to adapt methods and procedures for the ecological sustainability of fish resources under specific local, natural, and socio-economic conditions. Finally, the content is a good reference for natural sciences and agriculture students studying fish, fish resources, and fisheries sciences. It would improve their knowledge and perspectives on the challenges of sustainable use and conservation of inland water resources.
Percid Fishes
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Author : John F. Craig
language : en
Publisher: John Wiley & Sons
Release Date : 2008-04-30
Percid Fishes written by John F. Craig and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-04-30 with Technology & Engineering categories.
The percid fishes (or perch family) comprise many species including the perch, pikeperch, yellow perch, walleye and the darters. These species are of great ecological and economic importance, being important components of the freshwater ecosystem and recreational and commercial fisheries. Percid Fishes covers aspects such as systematics, morphology, biology, ecology, diseases and parasites and the economic importance of percid fisheries. Special emphasis is placed within the book on the complex relationship between this family of fishes and their environment and how they respond to perturbations, especially those induced by humans. The author, John Craig who has a great deal of experience working on these fishes in many of the countries in which they occur, has drawn together an extremely important book which provides a unique, comprehensive and indispensable review of this most significant group of fish.
Conservation Of Endangered Freshwater Fish In Europe
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Author : Arthur Kirchhofer
language : en
Publisher: Birkhäuser
Release Date : 2012-12-06
Conservation Of Endangered Freshwater Fish In Europe written by Arthur Kirchhofer and has been published by Birkhäuser this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Two events have recently improved the prospects of protecting fish and their environment in Switzerland: the acceptance of a new Federal Water Protection Law in the plebiscite of May 17th 1992, and the new Federal Legislation on Fisheries, in force since January 1st 1994. With this legal framework, the possibilities for protection of nature and landscape have now considerably improved in Switzerland. The most important aims of the Federal Law on Water Protection are to safeguard the natural habitats of the native flora and fauna and water as the habitat of aquatic organisms. This includes not only the preservation or restoration of water quality in lakes and rivers, but also, in rivers used for hydroelectricity, irrigation or as industrial or other water supplies, the maintenance of sufficient water to fulfill the minimal requirements for fish. However, good quality water in sufficient quan tities alone is not enough to guarantee the survival of fish. Intact fish habitats comprise various phYsical structures including plenty of hiding places, hunting grounds, reproduction and nursery areas within suitable distances from each other. This third aspect of conservation and restoration of aquatic habitats is a central point in the new Federal Law on Fisheries. Whereas the former versions of this law were more concerned with fishery regulations, the recent legislation defines new areas of responsibility for the federal and the cantonal governments.
Fischereibetrieb Und Fischereirecht In Oesterreich
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Author : Carl Peyrer
language : de
Publisher:
Release Date : 1874
Fischereibetrieb Und Fischereirecht In Oesterreich written by Carl Peyrer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1874 with Fisheries categories.