ISSN:
1365-2109
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract. A device for self-separating newly metamorphosed post-larvae prawns from larval culture tanks was designed based on the rheotactic activity exhibited by freshwater prawns after metamorphosis into post-larvae. The performance and effectiveness of the post-larvae selector were evaluated under (a) 24-h periods, (b) four water flows and (c) at two tank depths. A high migratory response (90% confidence level) during the dark period with a water flow range of approximately 11 pm was found. Thus the device has shown to be highly efficient in separating post-larvae in mixed population tanks. The avoidance of excessive handling stress, and the continuous automatic removal of post-larvae immediately following metamorphosis into juveniles are two of the most important advantages of this design as compared to other separation devices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2109.1985.tb00076.x
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