New Zealand Journal of Marine and Freshwater Research abstracts
Age, growth, and movements of giant bullies (Gobiomorphus gobioides) in
the Kakanui River estuary, South Island, New Zealand
D. J. JELLYMAN
P. M. SAGAR
G. J. GLOVA
J. R. E. SYKES
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 8602
Christchurch, New Zealand
email: d.jellyman@niwa.cri.nz
Abstract The giant bully,
Gobiomorphus gobioides
(Valenciennes),
is widespread throughout New Zealand, but remains one of
our least known freshwater fish. During a study of seasonal fish abundance and
movements in the Kakanui River estuary, South Island, New Zealand, giant
bullies captured mainly in fyke nets were measured and tagged. Growth rates and
movements were calculated for the 19 fish recaptured. Growth rates corresponded
with mean growth rates back-calculated from otoliths--scales were considered to
overestimate age, and no age classes were evident from length-frequency
distributions. Seasonal changes in condition were associated with spawning
during spring-summer.
Keywords giant bully; Gobiomorphus gobioides;
movements; condition; growth; tagging; recaptures
M99044
Received 23 July 1999; accepted 7 February 2000
PDF file of entire paper: medium quality (547K); (scanned from paper original: notes about this process)
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