The effects of gonadotropin-releasing hormone analog on yellowtail kingfish Seriola lalandi (Valenciennes, 1833) spawning and egg quality
| Autor: | Glen W. Irvine, A. King, Alvin N. Setiawan, Jane E. Symonds, Simon Muncaster, S. Pether, P. M. Lokman |
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| Rok vydání: | 2016 |
| Předmět: |
Parentage
0301 basic medicine media_common.quotation_subject Population Zoology Broodstock Aquatic Science Biology lcsh:Aquaculture. Fisheries. Angling Induction 03 medical and health sciences GnRHa food Captive breeding education media_common lcsh:SH1-691 education.field_of_study Seriola lalandi Reproduction Seriola 04 agricultural and veterinary sciences biology.organism_classification food.food Fishery 030104 developmental biology 040102 fisheries 0401 agriculture forestry and fisheries Hormone analog Animal Science and Zoology Inbreeding Egg quality |
| Zdroj: | Aquaculture Reports, Vol 4, Iss C, Pp 1-9 (2016) |
| ISSN: | 2352-5134 |
| DOI: | 10.1016/j.aqrep.2016.05.001 |
| Popis: | Communal spawning behaviour in marine aquaculture species often results in a few individuals contributing disproportionate amounts of gametes. This can lead to a reduction in genetic variability and increases the risk of inbreeding among successive generations. Therefore, long term sustainability of captive breeding programmes for such species partly depends upon maintaining a sufficiently high proportion of parents contributing high quality gametes during spawning. The current study was conducted to evaluate if the use of slow-release gonadotropin-releasing hormone analog (GnRHa) implants could increase the number of females spawning high quality gametes, and thus increase genetic variation in a captive population of yellowtail kingfish Seriola lalandi (Valenciennes, 1833). Broodstock fish received implants with or without 500 μg of GnRHa during the spawning season. GnRHa treatment was associated with a higher proportion of females contributing to spawning. However, compared to eggs from non-GnRHa-treated broodstock, GnRHa significantly decreased the floating rate, fertilisation rate, number of viable eggs and egg oil globule diameter. Overall, the use of slow-release GnRHa implants is a useful tool to increase parental contribution to spawning, but this benefit must be carefully balanced against lower egg quality. |
| Databáze: | OpenAIRE |
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