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Reproductive biology of mangrove jack (Lutjanus argentimaculatus) in northeastern Queensland, Australia

Russell, D.J. and McDougall, A.J. (2008) Reproductive biology of mangrove jack (Lutjanus argentimaculatus) in northeastern Queensland, Australia. New Zealand Journal of Marine and Freshwater Research, 42 (2). pp. 219-232.

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Publisher URL: http://www.royalsociety.org.nz/

Abstract

Lutjanus argentimaculatus is an Indo-Pacific species that inhabits riverine, coastal and offshore reef habitats. An investigation of the reproductive biology of Lutjanus argentimaculatus in northeastern Queensland waters (Australia) was undertaken between 1999 and 2002. Individuals in inshore estuarine and freshwater riverine habitats were mostly immature whereas those captured in offshore reef waters were predominantly mature. Males matured at a smaller size than females, with the length-at-50%-maturity (Lm50) for males estimated to be 470.7 mm fork length (FL) and 531.4 mm FL for females. The spawning season in northeastern Queensland was mostly during the austral spring-summer and peaked in December. The presence of ripe female fish and occurrence of postovulatory follicles in histological sections provided evidence that spawning activity was more pronounced during the full and third quarter moon phases. Lutjanus argentimaculatus were highly fecund with estimates of up to 4 x 106 ova per spawning event. Immature fish concentrated in inshore areas where they were targeted by recreational fishers whereas, in offshore areas, commercial fishers caught predominantly larger, mature fish.

Item Type:Article
Corporate Creators:Fisheries
Additional Information:© The Royal Society of New Zealand.
Keywords:Batch fecundity; Great Barrier Reef; Lutjanidae; reproduction; seasonality; sex ratios.
Subjects:Science > Biology > Reproduction
Science > Zoology > Chordates. Vertebrates > Fishes
Aquaculture and Fisheries > Fisheries > Fishery research
Deposited On:23 Nov 2008 23:59
Last Modified:07 Sep 2010 06:57

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