Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/44248
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Comparison of deterministic growth models fitted to length-at-age data of the piked spurdog (Squalus megalops) in south-eastern Australia |
Author: | Braccini, J. Gillanders, B. Walker, T. Tovar-Avila, J. |
Citation: | Marine and Freshwater Research, 2007; 58(1):24-33 |
Publisher: | C S I R O Publishing |
Issue Date: | 2007 |
ISSN: | 1323-1650 1448-6059 |
Statement of Responsibility: | J. Matías Braccini, Bronwyn M. Gillanders, Terence I. Walker and Javier Tovar-Avila |
Abstract: | Age and growth estimates of Squalus megalops were derived from the first dorsal fin spine of 452 sharks, ranging from 274 to 622mm total length. Age bias plots and indices of precision indicated that the ageing method was precise and unbiased. Edge analysis of the enameled surface of whole spines and similarities in the banding pattern deposited in the enameled surface of spines and in spine sections supported the hypothesis of annual band formation. Multiple versions of two growth models were fitted to length-at-age data, from which a two-phase von Bertalanffy model produced the best fit. For males, the change in growth rate corresponded with size-at-maturity, whereas for females, the change was slightly before size-at-maturity. Regardless of the growth model used, growth rate of females (0.034 to 0.098 years−1) was very low, making S. megalops highly susceptible to overexploitation by fisheries. |
Keywords: | age AIC Gompertz Squalidae von Bertalanffy |
Description: | © CSIRO 2007 |
DOI: | 10.1071/MF06064 |
Published version: | http://dx.doi.org/10.1071/mf06064 |
Appears in Collections: | Aurora harvest 6 Earth and Environmental Sciences publications Environment Institute Leaders publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.