Ecological studies on a Chaoborus larvae population in a tropical reservoir (Socuy reservoir, Venezuela)

Abstract:

Population density, diurnal vertical distribution and secondary production of limnetic Chaoborus larvae were studied during the dry and the rainy season. Population density was high (3,667-24,220 individuals/m2) and showed maximum values during the dry season. Larvae cycle was about 48 days. The highest percentage of biomass and production was due to older instars. These trends and values observed are similar to those reported for tropical eutrophic lakes. Also a vertical segregation of larvae in the water column was observed with early instars located nearer to the surface than older instars. While the mean depth of early instars was related to light, older instars position was associated to light, oxygen and food.

Año de publicación:

1996

Keywords:

Fuente:

scopus