Population structure of Thenus orientalis and T. indicus (Decapoda: Scyllaridae) in northeastern Australia

Jones, Clive M. (1993) Population structure of Thenus orientalis and T. indicus (Decapoda: Scyllaridae) in northeastern Australia. Marine Ecology Progress Series, 97. pp. 143-155.

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Abstract

[Extract] Bay lobsters of the genus Thenus are a valuable component of the incidental catch of the penaeid trawl fisheries of northern Australia. The 2 species present, Thenus indicus Leach, 1815 and Thenus orientalis (Lund, 1793), have mutually exclusive distributions. For each species, relative abundance, size and sex composition were measured monthly and related to physical characteristics including temperature, salinity, depth and sediment type. Both species populations were characterised by contagious distributions. Mean density of T. indicus was 1.78 (±0.15) lobsters ha⁻¹, while that of T. orientalis was 2.02(±0.13). In both populations, depth and sediment type were significantly correlated with abundance. T. indicus was most abundant in depths of 10-30 m and where sediments were characterised by a preponderance of find sands and silt. In contrast, T. orientalis was most abundant in 1.00 mm particle size. In both species, mean size varied significantly thorughout the year as a function of growth and recruitment. Male and female T. indicus were equally abundant, while male T. orientalis were significantly more abundant than females.

Item ID: 28384
Item Type: Article (Research - C1)
ISSN: 1616-1599
Keywords: bugs, population dynamics, Thenus, lobster
Date Deposited: 09 Sep 2013 04:19
FoR Codes: 06 BIOLOGICAL SCIENCES > 0608 Zoology > 060808 Invertebrate Biology @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070403 Fisheries Management @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830202 Wild Caught Crustaceans (excl. Rock Lobster and Prawns) @ 100%
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