Environmental factors influencing the reproduction of an estuarine penaeid population and implications for management

J.A. Crisp; N.R. Loneragan; J.R. Tweedley; F.M.L. D’Souza; B. Poh

doi:10.1111/fme.12278

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Environmental factors influencing the reproduction of an estuarine penaeid population and implications for management

Journal article

Peer reviewed

Environmental factors influencing the reproduction of an estuarine penaeid population and implications for management

J.A. Crisp, N.R. Loneragan, J.R. Tweedley, F.M.L. D’Souza and B. Poh

Fisheries Management and Ecology, Vol.25(3), pp.203-219

2018

DOI: https://doi.org/10.1111/fme.12278

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Abstract

This study determined environmental factors influencing the reproductive dynamics of a recreationally fished penaeid Metapenaeus dalli Racek in the Swan–Canning Estuary, south-western Australia, during a restocking programme. Prawns were collected from nearshore (<2 m deep) and offshore waters (>2 m deep) every lunar month from October 2013 to March 2016. Reproduction occurred between November and March, when water temperature was >17°C, salinity >25 and stratification (bottom–surface salinity) <3. Densities of gravid M. dalli were highest in November of each year when 0+ females matured (19 mm; ~56% asymptotic length) and were highest in the Lower Canning Estuary. Individual fecundity ranged from 34,000 (18.1 mm carapace length [CL]) to 132,000 ova (27.1 mm CL). Egg production peaked in December/January and differed among years, being greatest in 2015/2016. These results suggest that closing fishing between November and December would protect breeding aggregations of M. dalli in inshore waters.

Details

Title: Environmental factors influencing the reproduction of an estuarine penaeid population and implications for management
Authors/Creators: J.A. Crisp (Author/Creator) - Murdoch University
N.R. Loneragan (Author/Creator) - Murdoch University
J.R. Tweedley (Author/Creator) - Murdoch University
F.M.L. D’Souza (Author/Creator) - Murdoch University
B. Poh (Author/Creator) - Murdoch University
Publication Details: Fisheries Management and Ecology, Vol.25(3), pp.203-219
Publisher: Blackwell Publishing Ltd
Identifiers: 991005543462707891
Copyright: © 2018 John Wiley & Sons Ltd
Murdoch Affiliation: School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Industry collaboration; Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.659 Decapoda
Web Of Science research areas: Fisheries
ESI research areas: Plant & Animal Science