Journal
FISHERIES MANAGEMENT AND ECOLOGY
Volume 17, Issue 3, Pages 231-239Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2400.2009.00712.x
Keywords
otolith; Rachycentridae; spawner biomass per recruit; sportfishing; VBGF; yield per recruit
Categories
Funding
- CSIRO Division of Marine and Atmospheric Research
Ask authors/readers for more resources
P>Age and growth of Rachycentron canadum (L.) was studied in northern and eastern Australia to provide data for a preliminary assessment of the stock and to explore possible fisheries management strategies using minimum legal lengths. Fish collected from commercial and recreational fisheries ranged in size and weight from 125 to 1633 mm fork length (FL) and 0.031 to 55 kg respectively. Annual growth increments in sectioned otoliths formed by November-December. Estimated ages ranged from 0 to 7 yr for both genders. Longevity was estimated to be at least 13 yr. Von Bertalanffy growth function parameters were L(infinity) = 1160 mm FL, K = 0.63 yr-1 and t(0) = -0.21 yr-1. Rachycentron canadum reach 600 mm FL in their first year and over 1000 mm FL in 3 years. Natural and total mortalities were estimated at 0.35 yr-1 and 0.85 yr-1, respectively. Populations of R. canadum may be vulnerable to growth overfishing under the current minimum legal length of 750 mm total length (TL) in Queensland waters. An increase in minimum legal length to 850 mm TL is recommended.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available