Natural Resources

Aquaculture and Behavior by Felicity Huntingford, Malcolm Jobling, Sunil Kadri

By Felicity Huntingford, Malcolm Jobling, Sunil Kadri

Sleek aquaculture is confronted with a couple of demanding situations, together with public quandary approximately environmental affects and the welfare of farmed fish. A basic figuring out of fish biology is principal to discovering how you can meet those demanding situations and is additionally crucial for holding the industry's sustainability.

Furthermore, the behaviour of fish less than tradition events has lengthy been overlooked regardless of heavy advertisement losses which could outcome from fish under pressure and for this reason disease-prone, because of undesirable husbandry techniques.

This very important ebook summarises the present figuring out of the behavioural biology of farmed species and illustrates how this is utilized to enhance aquaculture practice.

Informative and interesting, Aquaculture & Behavior brings the reader up to date with significant concerns concerning aquaculture. every person from fish farmers to higher point scholars will locate this ebook a worthwhile and sensible source. Libraries in universities and examine institutions the place animal habit, aquaculture, veterinary and organic sciences are studied and taught must have copies of this paintings on their shelves.

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Such results indicate that responses to noxious stimuli are not just reflexes, but include changes in behavioural priorities. 2. A summary of some commonly-used indicators of fish welfare, with comments on what they might potentially tell us about welfare, according to the three different ways in which this is commonly defined. g. relating to brain reward and punishment systems) may reflect what fish feel Distress responses are natural acts, so not necessarily indicative of poor welfare Wild fish tend not to perform stereotypies, so these are unnatural and indicative of poor welfare By definition, inability to perform a full natural behavioural repertoire indicates poor welfare Spontaneous, natural choices by fish can indicate events and circumstances that promote/impair their welfare Altered patterns of gene expression are natural, so are not in themselves indicative of poor welfare Production of stress hormones is natural, so acutely elevated cortisol is not in itself indicative of poor welfare.

Perform interspecific hybridization (Le Francois et al. 2010). Hybridization has been carried out on all major groups of fish farmed for human consumption and some hybrids are the choice for commercial culture. Examples include a hybrid between Thai (Clarias macrocephalus) and African catfish (Clarias gariepinus), which combines the better eating qualities of the Thai catfish with the more rapid growth of the African species, and the sunshine bass, a hybrid cross between female white bass (Morone chrysops) and male striped bass (M.

2010). Fish farms must compete with other users for finite water supplies, especially in arid regions or where most of the fresh water comes from groundwater resources. Some water sources that receive agricultural, industrial or domestic discharges may not be suitable for use in fish farming or must be subjected to prior treatment to remove physical, chemical and biological hazards. Fish production systems produce wastes to an extent depending upon the type of production and the degree to which the units are open to surrounding waters.

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