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Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management


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Tracey, SR ORCID: 0000-0002-6735-5899, Lyle, JM and Haddon, M 2007 , 'Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management' , Fisheries Research, vol. 84, no. 3 , pp. 358-367 , doi: 10.1016/j.fishres.2006.11.025.

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This paper profiles the reproductive biology of and investigates the resilience of Tasmanian striped trumpeter under different levels of fishing pressure and size at entry to the fishery using per-recruit analysis. The spawning season around Tasmania occurs in the austral spring, with peak spawning activity in September and October. Size at 50% maturity was estimated at 543 mm fork length (FL) for females (estimated age = 6.8 years) and 529 mm FL for males (estimated age = 6.2 years). Striped trumpeter is a multiple spawner with batch fecundity estimates ranging from 205,054 for a 2 kg fish (540 mm FL) to 2,351,029 for a 9.5 kg fish (800 mm FL). At the current minimum legal size limit of 450 mm total length (equivalent to approximately 425 mm FL), yield-per-recruit was estimated to be close to maximum, and spawning biomass-per-recruit (SPR) ranged from 35 to 52% of virgin stock, depending on the mortality estimates used. Although these SPR are at a level considered sustainable, this methodology does not incorporate temporal variability, specifically recruitment variability. Therefore, conservative management measures are recommended until a dynamic model is applied to the striped trumpeter population.

Item Type: Article
Authors/Creators:Tracey, SR and Lyle, JM and Haddon, M
Keywords: Fecundity estimation; Spawner biomass-per-recruit; Yield-per-recruit
Journal or Publication Title: Fisheries Research
ISSN: 0165-7836
DOI / ID Number: 10.1016/j.fishres.2006.11.025
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