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Type: Journal article
Title: The spawning dynamics of snapper (Chrysophrys auratus)in northern Spencer Gulf, South Australia
Author: Saunders, R.
Fowler, A.
Gillanders, B.
Citation: New Zealand Journal of Marine and Freshwater Research, 2012; 46(4):491-510
Publisher: SIR Publishing
Issue Date: 2012
ISSN: 0028-8330
Statement of
Richard J. Saunders, Anthony J. Fowler and Bronwyn M. Gllanders
Abstract: This study investigated the inter-and intra-annual variation in the spawning dynamics of snapper (Chrysophrys auratus). Reproductive samples from northern Spencer Gulf, South Australia were collected over three seasons (2005/06, 2006/07 and 2007/08) and were analysed macro and microscopically. Spawning activity was determined by calculating estimates of spawning fraction and batch fecundities. The onset of spawning occurred in November but varied between years and corresponded with times when water temperature was between 18º C and 20º C. The length of the spawning season also differed between years. In each year the peak spawning activity occurred during December when fish spawned almost daily. Spawning frequency and relative batch size did not differ between the first two spawning seasons but, in the third season, batch size was considerably greater and spawning fractionally lower. These results are contrasted with a known recruitment of 0+ over the three years of the study.
Keywords: Chrysophrys auratus; recruitment; Pagrus; Sparidae; spawning; Spencer Gulf
Rights: © 2012 The Royal Society of New Zealand
RMID: 0020123548
DOI: 10.1080/00288330.2012.709522
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute publications

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