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Titolo:
Optimization of stocking ratios of two Indian major carps, rohu (Labeo rohita Ham.) and catla (Catla catla Ham.) in a periphyton-based aquaculture system
Autore:
Azim, ME; Wahab, MA; van Dam, AA; Beveridge, MCM; Huisman, EA; Verdegem, MCJ;
Indirizzi:
Univ Wageningen & Res Ctr, Wageningen Inst Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, Netherlands Univ Wageningen & Res Ctr Wageningen Netherlands NL-6700 AH Netherlands Bangladesh Agr Univ, Dept Fisheries Management, Mymensingh 2202, Bangladesh Bangladesh Agr Univ Mymensingh Bangladesh 2202 mensingh 2202, Bangladesh Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland Univ StirlingStirling Scotland FK9 4LA ture, Stirling FK9 4LA, Scotland
Titolo Testata:
AQUACULTURE
fascicolo: 1-2, volume: 203, anno: 2001,
pagine: 33 - 49
SICI:
0044-8486(20011126)203:1-2<33:OOSROT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Keywords:
periphyton; stocking ration; polyculture; Labeo rohita; Catla catla;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Azim, ME Univ Wageningen & Res Ctr, Wageningen Inst Anim Sci, Fish Culture& Fisheries Grp, POB 338, NL-6700 AH Wageningen, Netherlands Univ Wageningen & Res Ctr POB 338 Wageningen Netherlands NL-6700 AH
Citazione:
M.E. Azim et al., "Optimization of stocking ratios of two Indian major carps, rohu (Labeo rohita Ham.) and catla (Catla catla Ham.) in a periphyton-based aquaculture system", AQUACULTURE, 203(1-2), 2001, pp. 33-49

Abstract

Production of combinations of rohu (Labeo rohita) and catla (Catla catla) from periphyton-based aquaculture system was compared using 12 ponds and six stocking ratios: 100% rohu alone (treatment 100R), 80% rohu plus 20% catla. (80R/20C), 60% rohu plus 40% catla (60R/40C), 40% rohu plus 60% catla (40R/60C), 20% rohu plus 80% catla (20R/80C) and 100% catla alone (100C). Ponds (75 m(2), depth 1.5 in) were stocked at a rate of 15 000 fingerlings ha(-1). Bamboo poles (mean length = 2.0 m; mean diameter 5.5 cm; 9 poles m(-2)) used as periphyton substrates were planted vertically into the pond bottoms and ponds were fertilized fortnightly with cow manure, urea and triple super phosphate (TSP) at rates of 4500, 150 and 150 kg ha(-1), respectively. Phytoplankton biomass decreased with increasing catla biomass whereas periphyton biomass decreased with increasing biomass of rohu. Ash content of periphyton increased with increasing number of catla and decreasing number ofrohu. Growth of catla was dependent (P less than or equal to 0.05) on stocking density but that of rohu was independent (P > 0.05) of stocking density, possibly because of the reliance of the latter on periphyton for food. Highest fish yield was recorded in treatment 60R/40C (586 kg ha(-1)), followed by treatments 40R/60C (459 kg ha(-1)), 80R/20C (439 kg ha(-1)), 20R/80C and 100R (both 225 kg ha(-1)),and 100C (146 kg ha(-1)), respectively, over the 70-day period. A stocking ratio of 60% rohu and 40% catla appears appropriate for periphyton-based production systems of Indian major carps, although the ratio is likely to be influenced by both stocking density and food supply. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 16:16:32