01926nab a2200313 a 4500 AR-ReUNN 20260702003100.0 260630s2007 ag |||||||||||||||||spa spa eng Pizzolon, Lino 147666 Quirós, Rolando 147667 Productividad primaria en un estanque de cría de peces (31° 12´ S; 57° 55´ W) / Lino Pizzolon, Rolando Quiros 2007 18 páginas Disponible en estante de INICNE Primary productivity in a fish pond (31° 12´ S; 57° 55´ W) Gross and net primary productivity, respiration and related parameters were estimated in an experimental fish pond where silverside (Basilichthys bonariensis) were bred, using the oxygen light-dark bottle method. The results obtained showed a positive correlation (r = 0.83, p < 0.005) with temperature. The chlorophyll a concentration, the number of phytoplankton cells and the Secchi disk showed no correlation with primary productivity. The mean gross primary productivity on sunny days was 2022 g C m -2 day -1 in the deepest zone, with a 47% variation. For the whole pond the results was 538.7 kgC ha-1 year -1 considering a correction for statistical average of sunny days. The respiration/gross primary relation was 0.50 for the whole pond. With comparative purposes the primary productivity was estimated with the simplified method of daily curves and by the method of oxygen changes in open waters Peces de Agua Dulce 6471 Estanques Piscicolas 63005 Productividad 9641 Argentina 4258 Freshwater Fish 117439 Inland Waters 117440 Breeding 147041 Biological Production 147105 Ecosur 0325-108X v. 11 n. 21-22 (1984) 234603 ART (INICN)39234 234804 234804 234804 AR-ReUNN spa AR-ReUNN aacr2