Feeding habits of asp aspius aspius larvae (cyprinidae) in lake maroz, poland

Abstract

Feeding development of asp Aspius aspius larvae was studied during rearing in Lake Maroz (north Poland) illuminated cages. The initial rearing occurred under controlled conditions in a hatchery. After four and half weeks, reared fish (total length 14.8 mm) were transported to cages maintained in a lake. The initial stocking density was about 8 830 fish per cage. All experiments were replicated three times. Fish were fed Zooplankton collected during night with a light placed over the cages. During the seven weeks rearing period in lake cages survival was relatively high (over 72%). The observed feeding development pattern was as follow: rotifers, nauplii, copepodites, adult Copepoda, then adult Cladocera. The largest asp larvae also ate imago forms of insects. © 1998 Taylor & Francis Group, LLC.