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Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea

Year 2013, Volume: 19 Issue: 1, 95 - 110, 01.04.2013

Abstract

Abstract A total of 636 specimens of the greater weever, Trachinus draco, was collected monthly by bottom trawlers in the Eastern Black Sea. In order to identify some biological features of this species in the Black Sea, reproductive characteristics and growth parameters such as sex ratio, maturity stage, length at first maturity, spawning time, reproduction period, age, length-weight relationship, and condition factor were recorded. The female:male ratio was 1:1.04 (x2: 0.27, x20.05,1=3.84; P>0.05). Mean condition factors of females and males were 0.99055 and 0.95625, respectively. Taking into consideration of gonadosomatic index (GSI) and egg diameter, reproduction occurred in July and August. The age at first maturity was 1 year and the first reproduction length was 12.01 cm for females. The average diameter of mature egg was 0.91 ± 0.265 mm. Growth parameters of the von Bertalanffy equation were for females and males as follows: L∞ = 32.62 cm, K = 0.18 y-1, to = −1.74 year, and W∞ = 232.54 g, and L∞ = 29.31 cm, K = 0.17 y-1, to = −2.28 year, and W∞ = 232.54 g, respectively. The growth performance index (Ф) was 2.29, 2.17 and 2.36 for females, males and all specimens, respectively. The maximum age was 6 years for females and 5 years for males.

References

  • Abdallah, M. (2002) Length-weight relationship of fishes caught by trawl off
  • Alexandria, Egypt. Naga ICLARM Q. 25 (1): 19-20. Ak, O. (2009) Fish egg and larvae distribution with egg production and distribution of economic demersal fishes whiting (Merlangius merlangus euxinus Nordmann, 1840) and red mullet (Mullus barbatus ponticus, Ess. 1927) in Trabzon coast. Ph.D. Thesis. Ataturk University, Department of Aquaculture,
  • Erzurum, 151 pp. (in Turkish). Ak, O., Kutlu S., Aydın, İ. (2009) Length-weight relationship of fishes caught
Year 2013, Volume: 19 Issue: 1, 95 - 110, 01.04.2013

Abstract

References

  • Abdallah, M. (2002) Length-weight relationship of fishes caught by trawl off
  • Alexandria, Egypt. Naga ICLARM Q. 25 (1): 19-20. Ak, O. (2009) Fish egg and larvae distribution with egg production and distribution of economic demersal fishes whiting (Merlangius merlangus euxinus Nordmann, 1840) and red mullet (Mullus barbatus ponticus, Ess. 1927) in Trabzon coast. Ph.D. Thesis. Ataturk University, Department of Aquaculture,
  • Erzurum, 151 pp. (in Turkish). Ak, O., Kutlu S., Aydın, İ. (2009) Length-weight relationship of fishes caught
There are 3 citations in total.

Details

Primary Language English
Journal Section Articles
Authors

Orhan Ak This is me

Yasar Genç This is me

Publication Date April 1, 2013
Published in Issue Year 2013 Volume: 19 Issue: 1

Cite

APA Ak, O. ., & Genç, Y. . (2013). Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea. Journal of Black Sea / Mediterranean Environment, 19(1), 95-110.
AMA Ak O, Genç Y. Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea. Journal of Black Sea / Mediterranean Environment. April 2013;19(1):95-110.
Chicago Ak, Orhan, and Yasar Genç. “Growth and Reproduction of the Greater Weever (Trachinus Draco L., 1758) Along the Eastern Coast of the Black Sea”. Journal of Black Sea / Mediterranean Environment 19, no. 1 (April 2013): 95-110.
EndNote Ak O, Genç Y (April 1, 2013) Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea. Journal of Black Sea / Mediterranean Environment 19 1 95–110.
IEEE O. . Ak and Y. . Genç, “Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea”, Journal of Black Sea / Mediterranean Environment, vol. 19, no. 1, pp. 95–110, 2013.
ISNAD Ak, Orhan - Genç, Yasar. “Growth and Reproduction of the Greater Weever (Trachinus Draco L., 1758) Along the Eastern Coast of the Black Sea”. Journal of Black Sea / Mediterranean Environment 19/1 (April 2013), 95-110.
JAMA Ak O, Genç Y. Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea. Journal of Black Sea / Mediterranean Environment. 2013;19:95–110.
MLA Ak, Orhan and Yasar Genç. “Growth and Reproduction of the Greater Weever (Trachinus Draco L., 1758) Along the Eastern Coast of the Black Sea”. Journal of Black Sea / Mediterranean Environment, vol. 19, no. 1, 2013, pp. 95-110.
Vancouver Ak O, Genç Y. Growth and reproduction of the greater weever (Trachinus draco L., 1758) along the eastern coast of the Black Sea. Journal of Black Sea / Mediterranean Environment. 2013;19(1):95-110.