Age and growth of Boops boops (Linnaeus, 1758) in Izmir Bay, Aegean Sea, Turkey. (5th February 2015)

• Record Type: Journal Article
• Authors: Kara, A.; Bayhan, B.
• Is Part Of: Journal of applied ichthyology. Volume 31:Number 4(2015:Aug.)
• Page Start: 620
• Page End: 626
• Publication Date: 2015-02-05
• Subjects: Fishes -- Periodicals; Fish culture -- Periodicals; Fisheries -- Periodicals; Ichthyology -- Periodicals; 597
• DOI: 10.1111/jai.12680
• Languages: English
• ISSNs: 0175-8659

Abstract

<abstract abstract-type="main" id="jai12680-abs-0001"> <title>Summary</title> <p>The present study was conducted to determine the age relationships in lengths and weights of <italic>Boops boops</italic> (Linneaus, 1756) in Izmir Bay, central Aegean Sea. A total of 932 specimens (503 females and 429 males) were caught by gillnet, trammel net and a combination thereof on a monthly sampling basis from November 2008 through October 2009. Total length and weight of sampled fish ranged from 11.3 to 27.9 cm and from 12.2 to 261.7 g, with a mean of 19.6 cm and 82.7 g, respectively. Length‐weight relationships for all individuals were described by the parameters <italic>a </italic>=<italic> </italic>0.0050, <italic>b </italic>=<italic> </italic>3.237 and <italic>r² </italic>= 0.956. The von Bertalanffy growth curve fitted to the lengths‐at‐age provided parameters of <italic>L</italic><sub><italic>∞</italic></sub> = 29.87 cm <italic>k </italic>=<italic> </italic>0.243 and <italic>t</italic><sub><italic>o</italic></sub><italic> </italic>= −0.98 for males and <italic>L</italic><sub><italic>∞</italic></sub> = 30.79 cm, <italic>k </italic>=<italic> </italic>0.239 and <italic>t</italic><sub><italic>o</italic></sub><italic> </italic>= −0.90 for females. Based on otolith readings, age determinations varied from 1 to 5 years. Maximum age was 5 years in age group 2, with 29.84 and 37.97% for males and females, respectively. The overall 1 : 1.17 sex ratio of males to females was significantly biased toward females (P < 0.05). There was no statistical difference in the mean condition factor (P > 0.05), with a value of 1.028 for the entire population. The growth performance index (Φ<sup>'</sup>) was 2.33 and 2.36 for males and females, respectively. Results were similar to other geographical areas, which suggests that a common fisheries management might be possible.</p> </abstract>