Tielmann, M., Schulz, Carsten and Meyer, S. (2016) Self-grading of larval pike-perch (Sander lucioperca), triggered by positive phototaxis. Aquacultural Engineering, 72-73 . pp. 13-19. DOI 10.1016/j.aquaeng.2016.03.001.

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Abstract

The phototactic behavior of pike-perch (Sander lucioperca) larvae from 1 to 50 days post hatch (dph) was evaluated using a channel system with 0 and 700 lx light treatment. The findings of this work show larval pike-perch to be highly positive phototactic during its larval stage with a peak of positive phototactic behavior between 10 and 22 dph. After 22 dph positive phototaxis decreased and pike-perch increasingly preferred the lower light treatment. In a second experiment observed positive phototaxis was used to evaluate the effectiveness of a light triggered self-grading mechanism for pike-perch larvae at 16, 22, 28 and 34 dph. The use of larvae's positive phototaxis for a gentle self-grading was successful at 16 and 22 dph and decreased the length variability between 14 and 18% at 16 dph and between 18 and 28% at 22 dph. Whereas the grading at 28 and 34 dph led to an insufficient reduction in length heterogeneity. As a result the light triggered self-grading has the potential to be implemented in future rearing protocols and to be applied on pike-perch between 16 to 22 dph. Furthermore, it is suggested to consider a light triggered self-grading mechanism within upcoming tank designs for the rearing of larval pike-perch. (C) 2016 Elsevier B.V. All rights reserved.

Document Type:	Article
Additional Information:	Times Cited: 0 Tielmann, Moritz Schulz, Carsten Meyer, Stefan
Keywords:	pike perch, pikeperch, RAS, cannibalism, sight, eye development
Research affiliation:	Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence OceanRep > The Future Ocean - Cluster of Excellence > FO-R04 Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	Elsevier
Projects:	Future Ocean
Date Deposited:	30 Jan 2017 10:31
Last Modified:	23 Sep 2019 19:11
URI:	https://oceanrep.geomar.de/id/eprint/35711

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