Author:
Bruce Barry D.,Condie Scott A.,Sutton Caroline A.
Abstract
Small numbers of blue grenadier,
Macruronus novaezelandiae, larvae were found in coastal
waters off eastern Victoria and southern New South Wales in August 1993. This
is the first record of larval blue grenadier from mainland Australian waters.
It is considerably further north than previous records of larvae and remote
from the single known spawning ground off western Tasmania. Larvae were aged
between 17 and 36 days and were largely confined to an inshore northward
flowing water mass. Back calculated spawning dates indicated that larvae from
eastern Victoria/southern NSW were spawned earlier than larvae collected
during the same period off western and southern Tasmania. Otolith increment
widths were significantly wider in larvae caught in eastern
Victoria/southern NSW suggesting that they experienced faster growth and
development conditions than the Tasmanian larvae. Three-dimensional modelling
of circulation and particle advection suggested that the source of eastern
Victoria/southern NSW larvae was most likely eastern Bass Strait. These
data suggest that there is a second, albeit limited, spawning area for blue
grenadier in south-eastern Australia.
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography
Cited by
17 articles.
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