The Culture of Sharptooth Catfish, Clarias Gariepinus in Southern Africa PDF Download
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Author: Thomas Hecht
Publisher:
ISBN: 9780798844987
Category : Catfishes
Languages : en
Pages : 133
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Book Description
Author: Thomas Hecht
Publisher:
ISBN: 9780798844987
Category : Catfishes
Languages : en
Pages : 133
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Book Description
Author: Raoul W. Ponzoni
Publisher: WorldFish
ISBN: 9832346681
Category : Clarias gariepinus
Languages : en
Pages : 138
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Book Description
Author:
Publisher: WorldFish
ISBN: 9937239699
Category :
Languages : en
Pages : 193
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Book Description
Author: Pablo Arechavala-Lopez
Publisher: MDPI
ISBN: 3039217100
Category : Science
Languages : en
Pages : 132
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Book Description
Welfare is a multidimensional concept that can be described as the state of an animal as it copes with the environment. Captive environments can impact farmed animals at different levels, especially fishes, considering their highly complex sensory world. Understanding the ethology of a species is therefore essential to address fish welfare, and the interpretation of behavioral responses in specific rearing contexts (aquaculture or experimental contexts) demands knowledge of their underlying physiological, developmental, functional, and evolutionary mechanisms. In natural environments, the stress response has evolved to help animals survive challenging conditions. However, animals are adapted to deal with natural stressors, while anthropogenic stimuli may represent stressors that fishes are unable to cope with. Under such circumstances, stress responses may be maladaptive and cause severe damage to the animal. As welfare in captivity is affected in multiple dimensions, multiple possible indicators can be used to assess the welfare state of individuals. In the past, research on welfare has been largely focusing on health indicators and predominantly based on physiological stress. Ethological indicators, however, also integrate the mental perspective of the individual and have been gradually assuming an important role in welfare research: behavioral responses to stressors are an early response to adverse conditions, easily observable, and demonstrative of emotional states. Many behavioral indicators can be used as non-invasive measurements of welfare in practical contexts such as aquaculture and experimentation. Presently, research in fish welfare is growing in importance and interest because of the growing economic importance of fish farming, the comparative biology opportunities that experimental fishes provide, and the increasing public sensitivity to welfare issues.
Author: Gertjan de Graaf
Publisher: Conran Octopus
ISBN: 9789251039182
Category : Catfish fisheries
Languages : en
Pages : 84
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Book Description
The manual is based on the practical experiences of the authors on the artificial reproduction and pond rearing of the African catfish Clarias gariepinus within FAO field projects in the Central African Republic, the Republic of the Congo, Kenya and Nigeria. The manual is divided into five major sections dealing with: 1) general biology, including natural feeding habits and reproduction; 2) artificial reproduction, including induced propagation without and through hormone injection; 3) fry nursing in earthen ponds, including pond preparation, fertilization, feeding and management; 4) monoculture, including feeding methods; and 5) polyculture with Tilapia. In addition, information is provided concerning the economics of different fingerling and grow-out farming practices in Africa, and concerning diseases and hybridization.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 700
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Book Description
Author: S.S. de Silva
Publisher: Springer Science & Business Media
ISBN: 9780412550300
Category : Science
Languages : en
Pages : 346
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Book Description
Aquaculture is a growing industry. A vital component of the subject is feeding the organisms under cultivation. This book provides a thorough review of the scientific basis and applied aspects of fish nutrition in a user-friendly format. It will be of great use to individuals working or training in the industry, and to fish feed manufacturing personnel.
Author:
Publisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 688
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Book Description
Author: Lukuyu, B.
Publisher: ILRI (aka ILCA and ILRAD)
ISBN: 9291463485
Category :
Languages : en
Pages : 94
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Book Description
Author: Thomas Hecht
Publisher:
ISBN:
Category : Aquaculture
Languages : en
Pages : 72
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Book Description
