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Biology of the annular seabream, Diplodus annularis (Sparidae), in coastal waters of the Canary Islands

Biology of the annular seabream, Diplodus annularis (Sparidae), in coastal waters of the Canary... The biology of the Canary Islands annular seabream Diplodus annularis (Linnaeus 1758) was studied from samples collected between January and December 1998. Fish ranged from 82 to 209 mm total length in size and from 8.7 to 137.1 g in weight. The mean length showed an increase with increasing water depth. Males showed a negative allometric growth and females isometric growth. The species was characterized by protandric hermaphroditism. The overall sex ratio was unbalanced in favour of males (1 : 0.79). The reproductive season extended from January to May, with a peak in spawning activity in March–April. Males reached maturity at a smaller length (103 mm, 1‐year‐old) than females (128 mm, 2‐year‐old). Fish aged 0–6 years were found. The von Bertalanffy growth parameters for all individuals were: L∞=247.9 mm, k=0.268 years–1, and t0=–0.879 years. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

Biology of the annular seabream, Diplodus annularis (Sparidae), in coastal waters of the Canary Islands

Journal of Applied Ichthyology , Volume 17 (3) – Jun 15, 2001

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References (21)

Publisher
Wiley
Copyright
Copyright © 2001 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0175-8659
eISSN
1439-0426
DOI
10.1111/j.1439-0426.2001.00292.x
Publisher site
See Article on Publisher Site

Abstract

The biology of the Canary Islands annular seabream Diplodus annularis (Linnaeus 1758) was studied from samples collected between January and December 1998. Fish ranged from 82 to 209 mm total length in size and from 8.7 to 137.1 g in weight. The mean length showed an increase with increasing water depth. Males showed a negative allometric growth and females isometric growth. The species was characterized by protandric hermaphroditism. The overall sex ratio was unbalanced in favour of males (1 : 0.79). The reproductive season extended from January to May, with a peak in spawning activity in March–April. Males reached maturity at a smaller length (103 mm, 1‐year‐old) than females (128 mm, 2‐year‐old). Fish aged 0–6 years were found. The von Bertalanffy growth parameters for all individuals were: L∞=247.9 mm, k=0.268 years–1, and t0=–0.879 years.

Journal

Journal of Applied IchthyologyWiley

Published: Jun 15, 2001

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