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

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 (&...

Full description

Saved in:
Bibliographic Details
Published inFisheries management and ecology Vol. 25; no. 3; pp. 203 - 219
Main Authors Crisp, J. A., Loneragan, N. R., Tweedley, J. R., D’Souza, F. M. L., Poh, B.
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.06.2018
Subjects
aquaculture‐based enhancement
Brackishwater environment
Breeding
Carapace
Density stratification
Dynamics
Ecological aggregations
Egg production
Environmental factors
Environmental impact
Environmental management
Estuaries
Estuarine dynamics
Estuarine environments
Fecundity
Females
fishery
Fishing
Freshwater crustaceans
Marine crustaceans
Metapenaeus dalli
Ova
Penaeidae
Prawns
Processing fishery products
Reproduction
Restocking
Salinity
Salinity effects
shrimp/prawn
Stratification
Surface salinity
Water temperature
Swan-Canning Estuary
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:0969-997X
1365-2400
DOI:10.1111/fme.12278