Investigation on the effects of age and time of stripping on spermatocrit and duration of sperm motility in Oncorhynchus mykiss

Document Type : Research Paper

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Abstract

The effects of three male age groups (2, 3 and 4 years old) and spawning season on total duration of sperm motility and spermatocrit in November, December, January and February were studied. We found the highest amount of spermatocrit in 2 super(+) year males, in November (31.50 plus or minus 1.61) and the lowest amount of spermatocrit in the same age group was in February (25.11 plus or minus 0.9). The highest amount of spermatocrit in 3 years old fishes was spotted in November (21.42 plus or minus 0.7), but at this age, there were no significant difference between the level of spermatocrit in January and February. In 4 years old fishes, the highest spermatocrit value was seen in November (25.11 plus or minus 0.77) and the lowest spermatocrit was in February (18.20 plus or minus 0.20), but again with no significant difference between the amount of spermatocrit in January and February. In 2 years males, the highest duration of sperm motility was in January (27.7 plus or minus 1) and Fe.....
Iranian Scientific Fisheries Journal
Volume 17, Issue 2
January and February 2008
Pages 103-112

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