Effects of manures and pelleted feeds on survival,growth, and yield of Penaeus stylirostris and Penaeus vannamei in Panama |
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| Affiliation: | 1. Fisheries and Aquaculture Centre, Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 49, Hobart, TAS 7001, Australia;2. CSIRO Food Nutrition and Bio-based Products, Oceans & Atmosphere, GPO Box 1538, Hobart, TAS 7001, Australia;3. Central Science Laboratory, University of Tasmania, Bag 74, Hobart, TAS 7001, Australia;4. Department of Molecular and Cell Biology, James Cook University, Townsville, QLD 4811, Australia;1. School of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, Scotland, UK;2. Institute of Marine Research, Matre 5984, Norway;3. Department of Biology, Norwegian University of Science and Technology, Trondheim 7491, Norway;1. Institute of Aquaculture, School of Natural Sciences, University of Stirling, Stirling FK9 4LA, UK;2. The Royal (Dick) School of Veterinary Studies, Easter Bush Campus, Midlothian, Edinburgh EH25 9RG, Scotland, UK;3. BioMar Ltd., North Shore Road, Grangemouth FK3 8UL, UK;4. Landcatch Natural Selection Ltd., Stirling University Innovation Park, Stirling FK9 4NF, UK;1. LIVE EA4243, University of New Caledonia, 98851 Noumea Cedex, New Caledonia;2. IFREMER, Délégation de Nouvelle-Calédonie, BP 2059, 98846 Noumea Cedex, New Caledonia;3. RIA3, Research Institute for Aquaculture No. 3, 33 Dang Tat, Nha Trang, Viet Nam |
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| Abstract: | Brackishwater ponds on the Pacific coast of Panama were stocked at 5/m2 with wild-caught postlarval shrimp (0.05 g). Species composition at stocking was 56% Panaeus vannamei, 33% P. stylirostris and 11% P. occidentalis. Experimental treatments were: chicken manure (4500 kg/ha dry weight), cow manure (4500 kg/ha), 25% protein pelleted feed (790 kg/ha) and control (which received no nutrient input). Water was exchanged 5–10% daily throughout the 120-day production period during the 1982 rainy season. Average shrimp yields at harvest, by treatment, were: chicken manure, 262 kg/ha; cow manure, 218 kg/ha; feed, 386 kg/ha; and the control, 160 kg/ha. Average survival for each treatment was 50%, 76%, 58% and 77%, respectively. All P. occidentalis died during the production period. Survival was not significantly different among treatments (P > 0.05). Average weights or shrimp at harvest were 8.72g, 7.32 g, 12.07 g, and 5.98 g, respectively, for the treatments. Manures and feed significantly increased yield over the control (P < 0.002). Feed significantly increased yield over that of the manures (P < 0.0001), while yield for manures did not differ (P > 0.05). A partial budget analysis indicated that a net income for the feed treatment was higher than for chicken manure or cow manure treatments. |
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