New Zealand Journal of Marine and Freshwater Research abstracts
First record of pre-settlement juvenile bluenose, Hyperoglyphe
antarctica, from New Zealand
C. A. J. DUFFY
Department of Conservation
P. O. Box 112
Hamilton, New Zealand
A. L. STEWART
Museum of New Zealand Te Papa Tongarewa
P. O. Box 467
Wellington, New Zealand
R. YARRALL
Hawke's Bay Aquarium
P. O. Box 123
Napier, New Zealand
Abstract Epipelagic juvenile bluenose,
Hyperoglyphe
antarctica (Carmichael 1818), are recorded from New Zealand for the first
time. Two specimens were collected beneath flotsam near Nga Motu/Sugar Loaf
Islands, west coast North Island in September 1996, and at least 20 were found
inside a piece of trawl net drifting east of Cape Kidnappers, east coast North
Island in September 1997. Live specimens between 65 and 87.3 mm standard
length were cryptically coloured and were able to change their body colour from
dark coppery-bronze to blue. Freshly dead specimens lacked the thick mucous
coat found in juveniles of other
Hyperoglyphe species known to associate
with jellyfish. We suggest that
H. antarctica recruitment may be higher
along the lower east coast North Island because of retention of
flotsam-associated juveniles in the East Cape and Wairarapa Eddies, and that
juveniles spawned off south-east Australia may reach New Zealand in the Tasman
Current.
Keywords bluenose; Hyperoglyphe antarctica;
pre-settlement juveniles; drift algae; flotsam; recruitment processes
M99062
Received 1 November 1999; accepted 5 January 2000
PDF file of entire paper: medium quality (1445K); (scanned from paper original: notes about this process)
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