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Research Article
Spawning of South Caspian Kutum (Rutilus frisii kutum) in Most Migratory River of South Caspian Sea

M. Yousefian and H. Mosavi

Asian Journal of Animal and Veterinary Advances, 2008, 3(6), 437-442.

Abstract

The objective of this study was to study the status and the normative of reproduction of Caspian Kutum (Rutilus frisii kutum). The artificial reproduction in four rivers has investigated and the reproduction normative of this fish was compared. Based on the data of 2002, in total, about 30000 female and male have caught (ratio: 1 female to 2.4 male) and 4000 kg eggs have used for incubation in hatchery. The temperature in spawning time was in the range of 5-21°C but mostly 11°C, which is good for propagation. The number of dried eggs was 320 g-1. The fertilization rate is a good criterion for determination of eggs and sperm quality. The range of fertilization rate in four investigated river was 75 to 92% and it was significantly different (p<0.05). The hatchability in the rivers was very high but in those with high turbidity (colloid material) was low, due to damage the eggs during river incubation. The larvae reared in earthen pond riches of phytoplankton and zooplankton.

ASCI-ID: 13-118

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