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Spatio-temporal variability in reproductive ecology of sand flathead, Platycephalus bassensis, in three Tasmanian inshore habitats: potential implications for management

Citation

Bani, A and Moltschaniwskyj, NA, Spatio-temporal variability in reproductive ecology of sand flathead, Platycephalus bassensis, in three Tasmanian inshore habitats: potential implications for management, Journal of Applied Ichthyology, 24, (5) pp. 555-561. ISSN 0175-8659 (2008) [Refereed Article]


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The definitive published version is available online at: http://interscience.wiley.com

Official URL: http://interscience.wiley.com

DOI: doi:10.1111/j.1439-0426.2008.01076.x

Abstract

Temporal and spatial variability in gonad development, duration of spawning period, and size ⁄ age at maturity were investigated in sand flathead, Platycephalus bassensis. A 3-year study (20012003) revealed that variation in gonad weight with somatic weight was a function of an interaction between season and study location (Coles Bay, Georges Bay, and Tamar River estuary). Highest gonad weight was recorded in Coles Bay in early summer, which in comparison to Georges Bay, was approximately 50% higher and occurred 3 months later. Tamar River mature individuals were reproductively inactive during the spawning season. The proportion of mature individuals at different stages of maturity differed significantly among the three locations across all times. Coles Bay individuals were reproductively active from October to March, while in Georges Bay females with hydrated oocytes were seen in September but were absent from the population by November. Interannual variation in initiation and duration of spawning activity was evident in each location. Apart from male size at maturity, for both sexes the size and age at maturity (L50) was higher in Georges Bay compared to Coles Bay. The results emphasize the necessity of temporal and spatial management based on population differences in reproductive ecology.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Population Ecology
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Coastal and Estuarine Land Management
UTAS Author:Bani, A (Mr Ali Bani)
UTAS Author:Moltschaniwskyj, NA (Associate Professor Natalie Moltschaniwskyj)
ID Code:53303
Year Published:2008
Web of Science® Times Cited:6
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2008-11-24
Last Modified:2014-12-18
Downloads:2 View Download Statistics

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