Seasonal, interannual and spatial variability in the reproductive dynamics of Penaeus merguiensis

T.D. van der Velde; W.N. Venables; P.J. Crocos; S. Edgar; F. Evans; P.C. Rothlisberg

doi:10.3354/meps13540

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Seasonal, interannual and spatial variability in the reproductive dynamics of Penaeus merguiensis

Journal article

Peer reviewed

Seasonal, interannual and spatial variability in the reproductive dynamics of Penaeus merguiensis

T.D. van der Velde, W.N. Venables, P.J. Crocos, S. Edgar, F. Evans and P.C. Rothlisberg

Marine Ecology Progress Series, Vol.658, pp.117-133

2021

DOI: https://doi.org/10.3354/meps13540

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Abstract

Penaeid prawns (shrimp) are short-lived and fecund, with a complicated life cycle that includes offshore spawning followed by a coastal or estuarine postlarval and juvenile phase. Factors affecting survival during the early life-history stages, and during movement between these stages, will affect variability in recruitment to the nursery ground, the offshore subadult and adult population, and, ultimately, catch. The inability to predict recruitment, and ultimately commercial offshore catch, has been complicated by an incomplete understanding of these factors. The reproductive dynamics of Penaeus (Fenneropenaeus) merguiensis were investigated by simultaneous adult and larval sampling on 66 lunar-monthly surveys from March 1986 to March 1992 in Albatross Bay, northeastern Gulf of Carpentaria, Australia. Egg production was seasonal, with the highest production from 6-mo-old newly recruited spawners, and another peak from 12mo-old spawners. Larval abundance (no. m-2) followed the same seasonal pattern as the abundance of eggs. However, interannual variation in egg and larval abundance was large, and there was a weak correlation between monthly egg and larval abundance. Larval abundance appeared to be further influenced by fluctuations in chlorophyll a concentration, a measure of food availability. There was evidence of a match/mismatch relationship between larval abundance and episodic chlorophyll increases. While there was no direct spawner (egg production)-fishery recruit relationship in P. merguiensis over the 6-yr study, there was a strong relationship between total larval abundance in spring and the size of the commercial catch 3 to 6 mo later. Therefore, factors affecting larval survival, including food availability, have significant implications for fishery production.

Details

Title: Seasonal, interannual and spatial variability in the reproductive dynamics of Penaeus merguiensis
Authors/Creators: T.D. van der Velde (Author/Creator) - CSIRO Oceans and Atmosphere
W.N. Venables (Author/Creator) - Commonwealth Scientific and Industrial Research Organisation
P.J. Crocos (Author/Creator) - Stanthorpe Queensland 4380, Australia
S. Edgar (Author/Creator) - CSIRO Oceans and Atmosphere
F. Evans (Author/Creator) - Murdoch University
P.C. Rothlisberg (Author/Creator) - CSIRO Oceans and Atmosphere
Publication Details: Marine Ecology Progress Series, Vol.658, pp.117-133
Publisher: Inter-Research
Identifiers: 991005546335507891
Murdoch Affiliation: Separation Science and Metabolomics Laboratory
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.659 Decapoda
Web Of Science research areas: Ecology; Marine & Freshwater Biology; Oceanography
ESI research areas: Environment/Ecology