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SRAC# 422

Capturing, Handling, Transporting, Injecting and Holding Brood Fish

R.W. Rottmann, J.V. Shireman and F.A. Chapman


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The physical injury and physiological stress of capturing, handling, transporting, injecting and holding brood fish can have a greater detrimental effect on spawning success than almost any other factor. Fish must be handled carefully and optimum water conditions must be maintained to minimize stress. The importance of proper handling and water quality cannot be overemphasized. Female brood fish ready for spawning are in a particularly delicate condition. When female fish are stressed or injured, they may undergo rapid physiological changes that can result in the breakdown (resorption) of the eggs in the ovary. Fluctuations in temperature and low dissolved oxygen can hasten the resorption of eggs. Sub-optimum conditions, while not immediately lethal, may stress brood fish, resulting in delayed mortality or failure to spawn.
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