Observation on feeding habits of fish in ponds receiving green and animal manures in Wuxi, China
No hay miniatura disponible
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
Descripción
Fish yields and ratios of naturally occurring stable carbon isotopes, 13C: 12C (reported as ä C) from 1 mu (670 m2) and 5 mu (3330 m2) ponds were measured. The ponds received daily inputs of green and animal manures as the sole organic inputs. Fish yields exceeding 40 kg/ha per day were attained in both the small and large ponds. ä C data indicated a strong contribution of the fresh fluid pig manure to growth of the two filter-feeding species, silver and bighead carp. Two grass-eating species, g rass carp and Wuchang fish (Megalobrama amblyscephola), had significantly different ä C values, indicating partially separate food sources for each of these two species.