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Early development and the point of no return in pikeperch (Sander lucioperca L.) larvae

Authors
  • Xu, Zhengchao1
  • Li, Caijuan1
  • Ling, Qufei1
  • Gaughan, Sarah2
  • Wang, Guocheng1
  • Han, Xiaofei1
  • 1 Soochow University, School of Biology and Basic Medical Sciences, Suzhou, 215123, China , Suzhou (China)
  • 2 University of Nebraska at Omaha, Department of Biology & School of Interdisciplinary Informatics, Omaha, NE, 68182-0040, USA , Omaha (United States)
Type
Published Article
Journal
Chinese Journal of Oceanology and Limnology
Publisher
Science Press
Publication Date
Dec 01, 2016
Volume
35
Issue
6
Pages
1493–1500
Identifiers
DOI: 10.1007/s00343-017-6042-4
Source
Springer Nature
Keywords
License
Yellow

Abstract

The objectives of the present study were to evaluate the yolk-sac and oil globule absorption and point of no return (PNR) of pikeperch (Sander lucioperca L.) larvae. Artificial propagation of pikeperch was performed at (15±2)°C. Yolk-sac absorption, oil globule absorption, larval growth and the first initial feeding rate were observed to analyze the early growth and to determine the PNR of pikeperch larvae. The total length of newly hatched (0 day after hatching, DAH) pikeperch larvae was (4.25±0.22) mm and the volume of the yolk-sac and the oil globule was (0.30±0.12) mm3 and (5.14±2.28) 10-2 mm3 respectively. The yolk-sac and the oil globule were exhausted at 11 DAH and 14 DAH, respectively. Pikeperch larvae began feeding at 8 DAH with an initial feeding rate about 10.0%. From 9 to 14 DAH, the initial feeding rate increased rapidly, and reached its highest (about 82.7%) at 14 DAH. It declined thereafter, 48.9% at 15 DAH and 35.6% at 16 DAH, thus the pikeperch larvae reached PNR by 15–16 DAH. The appropriate first feeding time for the pikeperch larvae is 11–12 DAH, when the initial feeding rate is higher than half of the maximum initial feeding rate.

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