Does water temperature determine year class strength in New Zealand snapper (Pagrus auratus, Sparidae)?
Article first published online: 5 OCT 2007
Volume 2, Issue 2, pages 65–72, June 1993
How to Cite
FRANCIS, M. P. (1993), Does water temperature determine year class strength in New Zealand snapper (Pagrus auratus, Sparidae)?. Fisheries Oceanography, 2: 65–72. doi: 10.1111/j.1365-2419.1993.tb00121.x
- Issue published online: 5 OCT 2007
- Article first published online: 5 OCT 2007
- Received for publication 19 October, 1992 Accepted for publication 10 December, 1992
- Pagrus auratus;
- year class strength
The abundance of 1+ snapper (Pagrus auratus) was estimated by trawl surveys and was found to vary 17-fold over 7 years. There was a strong positive correlation between year class strength and autumn (April-June) sea surface temperature during the 0+ year, with the latter explaining 94% of the variability in year class strength. The underlying mechanism is unknown, but three hypotheses relating snapper growth and survival to temperature are discussed. The strengths of the 1991 and 1992 year classes are predicted to be below average and extremely weak, respectively.