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Spatial variation in size at onset of maturity of female southern rock lobster Jasus edwardsii around Tasmania, Australia
Citation
Gardner, C and Frusher, SD and Barrett, NS and Haddon, M and Buxton, CD, Spatial variation in size at onset of maturity of female southern rock lobster Jasus edwardsii around Tasmania, Australia, Scientia Marina, 70, (3) pp. 423-430. ISSN 0214-8358 (2006) [Refereed Article]
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Official URL: http://scientiamarina.revistas.csic.es/index.php/s...
DOI: doi:10.3989/scimar.2006.70n3423
Abstract
The size at onset of maturity (SOM) of female Jasus edwardsii (Hutton, 1875) was estimated at 50 sites around
Tasmania, Australia, based on the presence of ovigerous setae. There was a distinct spatial cline with the largest SOM being
found at northwestern sites and the smallest at southwestern sites. Variation in SOM between sites was substantial and ranged
from 59 mm to 112 mm carapace length. The observed decline in SOM from north to south was the reverse of that described
for the same species at similar latitudes in New Zealand, which suggests that SOM in J. edwardsii is regulated by factors in
addition to temperature. The effect of density on female SOM was investigated by comparing SOM estimates from two
marine reserves with adjacent fished sites; however, there was no evidence of a decline in SOM with increasing density as
predicted. A model of SOM predicted by latitude and longitude is described to facilitate spatial modelling of lobster stocks.
The substantial and predictable spatial variation in SOM implies that management of this fishery would be improved by
incorporating spatial elements, such as regional legal minimum size limits.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | Jasus edwardsii; maturity; rock lobster; reproduction; spatial management |
| Research Division: | Agricultural, Veterinary and Food Sciences |
| Research Group: | Fisheries sciences |
| Research Field: | Aquaculture and fisheries stock assessment |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - wild caught |
| Objective Field: | Fisheries - wild caught not elsewhere classified |
| UTAS Author: | Gardner, C (Professor Caleb Gardner) |
| UTAS Author: | Frusher, SD (Professor Stewart Frusher) |
| UTAS Author: | Barrett, NS (Associate Professor Neville Barrett) |
| UTAS Author: | Haddon, M (Associate Professor Malcolm Haddon) |
| UTAS Author: | Buxton, CD (Professor Colin Buxton) |
| ID Code: | 40945 |
| Year Published: | 2006 |
| Web of Science® Times Cited: | 49 |
| Deposited By: | TAFI - Marine Research Laboratory |
| Deposited On: | 2006-08-01 |
| Last Modified: | 2009-11-10 |
| Downloads: | 890 View Download Statistics |
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