Demography of a population of moina micrnra KURZ (crustacea: cladocera) in a temporary pond, Peninsula of Paraguana, Venezuela

Abstract:

A population of M. micriira KURZ from a shallow, muddy and temporary pond, located in Peninsula of Paraguana, western Venezuela, was studied from filling to drying phase. Population density, age structure, fecundity, and length of females, were determined. This population showed a low population density (<50ind/l), a low and density-dependent fecundity (mean eggs/adults = 1.3; mean clutch size = 2.1 eggs + embryos), and low juveniles to adults ratio (0.71). No significant correlation was detected between mean clutch size and mean body length of ovigerous females. Our results suggest effects of food limitations, and fish prédation on demographic parameters of this population. Still, in unfavourable conditions, some demographics features associated to opportunistic species were evident.

Año de publicación:

1997

Keywords:

• Afoina
• population
• Tropical ponds
• Temporary pond
• Demography
• fecundity

Fuente:

scopus