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Titolo:
Use of artificial substrates to enhance production of freshwater herbivorous fish in pond culture
Autore:
Keshavanath, P; Gangadhar, B; Ramesh, TJ; van Rooij, JM; Beveridge, MCM; Baird, DJ; Verdegem, MCJ; van Dam, AA;
Indirizzi:
Wageningen Univ, Dept Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, Netherlands Wageningen Univ Wageningen Netherlands NL-6700 AH ageningen, Netherlands Univ Agr Sci Mangalore, Coll Fisheries, Mangalore 575002, Karnataka, IndiaUniv Agr Sci Mangalore Mangalore Karnataka India 575002 Karnataka, India Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland Univ StirlingStirling Scotland FK9 4LA ture, Stirling FK9 4LA, Scotland
Titolo Testata:
AQUACULTURE RESEARCH
fascicolo: 3, volume: 32, anno: 2001,
pagine: 189 - 197
SICI:
1355-557X(200103)32:3<189:UOASTE>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERIPHYTON; PHYTOPLANKTON;
Keywords:
periphyton; pond culture; Tor khudree (Sykes); artificial substrates; herbivorous fish;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: van Dam, AA Wageningen Univ, Dept Anim Sci, Fish Culture & Fisheries Grp, POB 338, NL-6700 AH Wageningen, Netherlands Wageningen Univ POB 338 Wageningen Netherlands NL-6700 AH nds
Citazione:
P. Keshavanath et al., "Use of artificial substrates to enhance production of freshwater herbivorous fish in pond culture", AQUAC RES, 32(3), 2001, pp. 189-197

Abstract

Two trials were concrete tanks to assess the potential of using artificialsubstrates to enhance fish production in ponds. Three substrate types weretested: bamboo poles, PVC pipes and sugarcane bagasse bundles, In one trial, periphyton was grown on the substrates in the absence of fish. In the second trial, masheer (Tol khudree Sykes) fingerlings were stocked at three densities, Results showed a significant effect of substrate type on fish growth (P less than or equal to0.001) and on net fish production (P less than or equal to0.05), with best growth in the tanks using the bamboo substrate. In the bagasse treatment, 100% fish mortality occurred, Highest extrapolated periphyton-based gross fish yield (i.e. without feed inputs) was 450 kg ha(-1) 90 d(-1) with PVC and 491 kg ha(-1) 90 d(-1) with bamboo substrate. The best periphyton growth occurred on bamboo, followed by bagasse and PVC,Without fish, mean periphyton biomass during the culture period was 0.56-1.20 mg cm(-2) on bamboo [ash-free dry matter (DM)I, against 0.09-0.36 mg cm(-2) on PVC and 0.20-0.59 mg cm(-2) on bagasse, No clear effect of fish density or water depth on periphyton biomass could be seen. Only on bamboo, fish density seemed to have a negative effect on periphyton ash-free dry matter and a positive effect on pigment content (chlorophyll-a and phaeophytin), Periphyton from bamboo had a lower ash content (35-47% of DM) than from PVC (54-55% of DM) or bagasse (51-58% of DM), It is concluded that substratetype has a strong effect on periphyton productivity and composition, and on fish productivity. Good fish production was achieved without feed inputs. More research is needed to study the economic viability of periphyton-based systems in the context of Indian aquaculture.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 15:16:18