CATCHABILITY, MORPHOMETRIC RELATIONSHIPS AND CHEMICAL COMPOSITION OF THE EXOTIC CRAYFISH Procambarus clarkii OF THE RIVER NILE AND ITS POSSIBILITY FOR EXPLOITATION IN EGYPT | ||
| Journal of Animal and Poultry Production | ||
| Article 4, Volume 25, Issue 2, February 2000, Pages 787-799 PDF (605.78 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2000.258595 | ||
| Author | ||
| A. A. Tharwat, | ||
| Department of Animal Production, Faculty of Agriculture, Cairo University, Giza, Egypt. | ||
| Abstract | ||
| The exotic crayfish Procambarus clarkii has been successfully inhabited the river Nile in Egypt and its economic importance is becoming more apparent. Up till now, P. clarkii is unexploited in Egypt, so it is not subject to catch by the fishermen in the river Nile. Therefore, the present work was carried out on the catch efficiency of P. clarkii as catch per unit effort by the designed traps and to determine the seasonality of its relative abundance during the year. Morphometric relationships of body length and body weight with the abdominal length, carapace length, abdominal weight and skeleton and wastes weight were studied. The average of dress-out percentage (abdominal muscle %) was 15.5 + 1.06 and 19.0 + 1.04 for males and females, respectively. The chemical composition of both inedible parts (skeleton and wastes) and unmarketable crayfish were determined and evaluated to produce the crayfish meal. This study aims to manage the wild stock in the river Nile using traps and exploitation the yield in two directions; the edible part dressed-out for human consumption and the inedible part for processing crayfish meal as a source for animal diets. | ||
| Keywords | ||
| Crayfish; catchability; traps; relative abundance; morphometry; fishmeal; river Nile | ||
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