Details

Autor(en) / Beteiligte

• Russell, D. J.
• McDougall, A. J.

Titel

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

Ist Teil von

• New Zealand journal of marine and freshwater research, 2008-06, Vol.42 (2), p.219-232

Ort / Verlag

Taylor & Francis Group

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Lutjanus argentimacuiatus is an Indo-Pacific species that inhabits riverine, coastal and offshore reef habitats. An investigation of the reproductive biology of Lutjanus argentimacuiatus 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 (Lm 50 ) 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 argentimacuiatus were highly fecund with estimates of up to 4 × 10 6 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 lamer, mature fish.