Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Comparative feeding behaviour of Penaeus kerathurus (Forskål, 1775) (Crustacea, Penaeidae) and Palaemon serratus (Pennant, 1777) (Crustacea, Palaemonidae) during larval development.

Abstract

Some aspects of the larval feeding behaviour of two autochthonous species of shrimp, P. kerathurus and Palaemon serratus were studied. For P. kerathurus, feeding rates on Chlorella sp. and Isochrysis galbana were determined at 3 different concentrations during the protozoeal stage, and on Artemia franciscana at 4 different densities during the mysis stage. The selectivity between Brachionus plicatilis and A. franciscana nauplii was tested experimentally and the Ivlev selectivity index was calculated at the mysis stage. For Palaemon serratus Zoea III, V and VII, feeding rates on newly hatched A. franciscana nauplii, on metanauplii enriched during 24 h in Protein Selco, and on starved metanauplii were determined. The Ivlev selectivity index was also calculated. P. kerathurus and Palaemon serratus larvae had a negative selectivity for B. plicatilis. It is suggested that the optimal density of A. franciscana for the mysis stage of P. kerathurus is around 10 nauplii mL-1. It was shown that the use of enrichment products leading to a very high lipid content of the prey may reduce their consumption rate.