New Zealand Journal of Marine and Freshwater Research abstracts
Seasonal changes in ovarian activity of New Zealand turbot
(Colistium nudipinnis) and brill (C. guntheri)
C. W. POORTENAAR+
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 109 695, Newmarket
Auckland, New Zealand
email: c.poortenaar@niwa.cri.nz
R. W. HICKMAN
M. J. TAIT
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 14 901, Kilbirnie
Wellington, New Zealand
F. M. GIAMBARTOLOMEI
University of Auckland
Leigh Marine Laboratory
P. O. Box 349
Warkworth, New Zealand
Abstract Seasonal changes in ovarian activity were
investigated in New Zealand turbot Colistium nudipinnis (Waite 1910) and
brill Colistium guntheri (Hutton 1873), collected by commercial trawlers
along the west coast of the South Island of New Zealand. Both species
demonstrated group synchronous oocyte development, with a capacity for multiple
ovulations within a reproductive season. During a 17-h trawl survey, ovulated
turbot were caught between 1500 and 2030 h, indicating a daily spawning rhythm.
The turbot and brill spawning seasons were prolonged (late autumn to mid
summer). A protracted spawning season confers some advantages in aquaculture.
Keywords turbot; brill; New Zealand; oocyte development;
reproduction; aquaculture
New Zealand Journal of Marine and Freshwater Research, 2001, Vol. 35:
521-529
0028-8330/01/3503-0521 $7.00 (c) The Royal Society of New Zealand
2001
PDF file of entire paper: medium quality (1104K); (scanned from paper original: notes about this process)
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