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Titolo:
Partial nutrient budgets for semi-intensive shrimp farms in Honduras
Autore:
Teichert-Coddington, DR; Martinez, D; Ramirez, E;
Indirizzi:
Auburn Univ, Alabama Agr Expt Stn, Dept Fisheries & Allied Aquacultures, Auburn, AL 36849 USA Auburn Univ Auburn AL USA 36849 Allied Aquacultures, Auburn, AL 36849 USA Lab Calidad Agua, La Lujosa, Choluteca, Honduras Lab Calidad Agua La Lujosa Choluteca Honduras ujosa, Choluteca, Honduras
Titolo Testata:
AQUACULTURE
fascicolo: 1-2, volume: 190, anno: 2000,
pagine: 139 - 154
SICI:
0044-8486(20001025)190:1-2<139:PNBFSS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHANNEL CATFISH; PONDS; HARVEST;
Keywords:
nutrient budgets; shrimp farms; Honduras;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Teichert-Coddington, DR Auburn Univ, Alabama Agr Expt Stn, Dept Fisheries & Allied Aquacultures, 203 Swingle Hall, Auburn, AL 36849 USA Auburn Univ 203 Swingle Hall Auburn AL USA 36849 A
Citazione:
D.R. Teichert-Coddington et al., "Partial nutrient budgets for semi-intensive shrimp farms in Honduras", AQUACULTURE, 190(1-2), 2000, pp. 139-154

Abstract

Shrimp farms in Latin America typically have relatively low stocking ratesand are managed without aeration. Nutrient budgets for these farms have not been well established, intake and discharge from 21 ponds on six shrimp farms located on estuaries or embayments of the Gulf of Fonseca in Honduras were characterized during rainy and dry seasons; Mean shrimp stocking rate,yield, and feed conversion ratio (FCR) for these ponds were 8.2/m(2), 633 kg/ha, and 2.74, respectively. Mean intake values of soluble reactive phosphate (SRP)I dissolved inorganic nitrogen (DIN), total nitrogen (TN), total phosphorus (TP) and BOD5 were significantly higher in estuaries than in embayments during both seasons. Water exchange produced a mean net discharge of TN, TP, BOD5, chlorophyll a, COD, total alkalinity and salinity, and a mean net intake of DIN; mean SRP was practically equal in discharge and intake water. Each kilogram of feed nitrogen and phosphorus applied to ponds resulted in 0.21 kg of net nitrogen discharge and 0.16 kg of net phosphorus discharge by water exchange. Use of inorganic fertilizers promoted net discharge of phosphorus and nitrogen. Net nitrogen discharge by water exchange significantly increased as nitrogen input by feed increased (P < 0.01). Pondsgained nitrogen primarily from intake water (63%) and feed (36%), and nitrogen was lost primarily from water exchange (72%) and harvested shrimp (14%). Ponds gained phosphorus mostly from intake water (51%) and feed (47%), and phosphorus was lost primarily from water exchange (56%) and harvested shrimp (9%). About 7% of input nitrogen and almost a third (31%) of input phosphorus were not accounted for in measured losses, and presumably were fixed or metabolized in ponds. Mean conversion of feed nitrogen and phosphorus to shrimp flesh averaged 41% and 20%, respectively. Each kilogram of shrimpproduction resulted in 16.8 g of net nitrogen loss and 2.3 g of net phosphorus loss by water exchange. (C) 2000 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 19/01/20 alle ore 20:19:49