Self-grading of larval pike-perch (Sander lucioperca), triggered by positive phototaxis |
| |
| Institution: | 1. Gesellschaft für Marine Aquakultur, Hafentörn 3, 25761 Büsum, Germany;2. Institute of Animal Breeding and Husbandry, Marine Aquaculture, Christian-Albrechts-University, Kiel, Germany;1. Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, 313001, China;2. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, China;3. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China;1. Faculty of Marine Science and Technology, University of Hormozgan, P.O. Box 3995, Bandar Abbas, Iran;2. Department of Modern Technologies, Mangrove Forests Research Center, University of Hormozgan, Bandar Abbas, Iran;3. Iranian Fisheries Science Research Institute, Shrimp Research Center, Agricultural Research Education and Extension Organization (AREEO), Bushehr, Iran;4. Department of Chemistry, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;5. Fisheries Department, Natural Resources Faculty, University of Kurdistan, Zip Code: 66177-15175, P.O. Box 416, Sanandaj, Kurdistan, Iran;1. Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Departamento de Aquicultura, Laboratório de Camarões Marinhos, Servidão dos Coroas, 503, Barra da Lagoa, Florianópolis, SC, CEP 88061-600, Brazil;2. Instituto Federal Catarinense Campus de Araquari, Rodovia BR 280, km 27, Araquari, SC, CEP 89245-000, Brazil;1. School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia;2. Future Fisheries Veterinary Services Pty Ltd, East Ballina, NSW 2478, Australia;3. South Australian Research and Development Institute (SARDI), West Beach, SA 5024, Australia;4. Marine Innovation Southern Australia (MISA), West Beach, SA 5024, Australia |
| |
| 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. |
| |
| Keywords: | pike perch pikeperch RAS cannibalism sight eye development |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
