Preliminary studies on the culture of Atya crassa in outdoor and indoor tanks
A. crassa of sizes ranging 7.05~c 0.13g to 8.5~c 0.05g were purchased from fishermen around the Jebba Lake. They were transported in open jerry cans in a cold van for about two hours. The indoor tanks measured 3m x 2m x 1.5m while the out door tanks were 2m x 2m x 1.5m. The indoor tanks were stocked 17 prawns per tank while the outdoor tanks were stocked 10 prawns per tank. The experimental diets were formulated with crude protein levels 30%, 35% and 40%. The ingredients used were fishmeal, palm kernel cake, guinea corn, starch, calcium carbonate and these were fortified with premixes. Each diet was assigned to two tanks each indoors and outdoors. They were fed twice daily (9hrs and 19hrs) for 184 days. Positive growth was observed in both indoor and outdoor tanks. There was no significant difference in the growth of prawns fed outdoor (P>0.05). There was significant difference in the growth parameters of prawns fed the varying diets indoors. The percentage survival of prawns was higher outdoors and there was no significant difference (P>0.05) in the survival recorded in the three treatments. There was significant difference (P<0.05) in the survival of prawns in indoor tanks. The carcass composition of A. crassa fed the three diets show crude protein lower at harvest than the prawns stocked initially. Percentage lipid, ash and fibre of the harvested prawns were higher than at initial stocking. A. crassa is cultivable in freshwater and it should be reared with 30% crude protein diet in outdoor systems. Attempts should be made in the larval rearing of the species.
| Main Authors: | , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2010
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| Subjects: | Aquaculture, Atya crassa, Nigeria, Jebba L., freshwater environment, Feeding experiments, Experimental culture, Feed efficiency, Nutritional requirements, Shrimp culture, |
| Online Access: | http://hdl.handle.net/1834/38138 |
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