Title of article :
Occurrence of tropical fishes in temperate southeastern Australia: Role of the East Australian Current
Author/Authors :
D.J. Booth، نويسنده , , W.F. Figueira، نويسنده , , M.A. Gregson، نويسنده , , L. Brown، نويسنده , , G. Beretta، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
Dispersal of larval propagules is the major mechanism facilitating connectivity of marine populations. However, only a fraction of larvae
settle in suitable habitat. For coral reef fishes, many larvae are advected away from coral reefs, often despite strong behavioural mechanisms
(including swimming), and some may travel long distances away from the tropics. Here we document the occurrence of tropical reef fishes along
the southeast coast of Australia between 2003 and 2005 and evaluate the role of the East Australian Current (EAC) in driving this pattern. In total
we observed 47 species of tropical fishes from 11 families during the summer recruitment season (January to May) at locations spanning most of
the length of the New South Wales coast (28 Se37.5 S latitude, w1700 km from the southern end of the Great Barrier Reef). Southern
locations tended to have reduced richness and density relative to northern ones. In general, the southward extent of distribution of the most
commonly observed species was well explained by their planktonic larval durations. Recruitment events tended to be much more episodic in
Merimbula (37 S) than Sydney (34 S), but there was little evidence for interannual similarity in the spatial patterns of recruitment of individual
species with exception of the numerical dominance of Abudefduf vaigiensis and Abudefduf sexfasciatus (Pomacentridae) at the Sydney location
and of Chaetodon auriga and Chaetodon flavirostris (Chaetodontidae) at the Merimbula location. Despite strong evidence for the role of the
EAC in the transport of these species at a coastal scale, we found little evidence that individual recruitment events were correlated with local
increases in water temperature that would be associated with EAC ingress.
Keywords :
damselfish , Marine , East Australian Current , Australia , Transport processes , tropical fish , 149 Ee155 E] , New South Wales , butterflyfish
Journal title :
Estuarine, Coastal and Shelf Science
Journal title :
Estuarine, Coastal and Shelf Science