Population Dynamics, Current Trends and Future Prospects of the Black Goby (Gobius niger) in the Eastern Part of the Black Sea (Turkiye)

Mehmet AYDIN; Uğur KARADURMUŞ

doi:https://doi.org/10.26650/ASE20221074075

Makale detayları

Population Dynamics, Current Trends and Future Prospects of the Black Goby (Gobius niger) in the Eastern Part of the Black Sea (Turkiye)

Yazarlar:

Mehmet AYDIN | Uğur KARADURMUŞ

Yayıncı:

Istanbul University

Ana Başlıklar:

Ekoloji

Dergi:

Aquatic Sciences and Engineering 2022 Vol.37 Issue 3, pp.142-150

Belge Tipi:

Makale

Yayın Tarihi:

6/2022

Belge Dili:

İngilizce

Document ID (Org No.):

2000859727

Sıklık:

Üç Aylık

eISSN:

2602-473X

pISSN:

2602-473X

DOI:

https://doi.org/10.26650/ASE20221074075

Özet:

 

With its adaptation to the Black Sea, the black goby Gobius niger (Linnaeus, 1758) has increased in biological  and  ecological  importance  in  recent  years.  Despite  previous  studies,  up-to-date  information on population status in the Black Sea is still lacking. Specimens were collected monthly from April 2020 to March 2021 from different commercial fishing landings on the Turkish coast of the eastern Black Sea. The total length of sampled individuals (n=630) ranged from 7.20 to 14.0 cm. Males were dominant throughout all size classes and the overall sex ratio was significantly different from the expected ratio of 1:1. The length-weight relationship indicated isometric growth (b=3) for both sexes. Spawning occurred from March to June. The observed maximum age was 4 and both males and females were dominant in age group 3. The black goby appeared to have relatively low growth  rates  (Φ′=1.74)  in  the  Black  Sea,  but  longer  asymptotic  length  (L∞=16.94  cm)  data  were  obtained  in  the  study  area.  The  total  mortality  rate  (Z)  estimated  by  means  of  the  catch  curve  method was 1.43 yr-1 and the fishing mortality (F) was 0.88 yr-1. The estimated exploitation rate (E) was  0.61  yr-1  which  was  higher  than  the  optimum  value  of  0.5.  Updated  biological  parameter  estimates  show  that  black  goby  populations  in  the  Black  Sea  are  now  more  exploited  than  previously  thought.  Additional  studies  are  recommended  to  ensure  sustainable  management  of  black goby populations and national regulations to reduce bycatch.

Makale detayları

Population Dynamics, Current Trends and Future Prospects of the Black Goby (Gobius niger) in the Eastern Part of the Black Sea (Turkiye)

Yazarlar: Mehmet AYDIN | Uğur KARADURMUŞ

Yayıncı: Istanbul University

Ana Başlıklar: Ekoloji

Dergi: Aquatic Sciences and Engineering 2022 Vol.37 Issue 3, pp.142-150

Belge Tipi: Makale

Yayın Tarihi: 6/2022

Belge Dili: İngilizce

Document ID (Org No.): 2000859727

Sıklık: Üç Aylık

eISSN: 2602-473X

pISSN: 2602-473X

DOI: https://doi.org/10.26650/ASE20221074075

Sayı

Yazarlar:

Mehmet AYDIN | Uğur KARADURMUŞ

Yayıncı:

Istanbul University

Ana Başlıklar:

Ekoloji

Dergi:

Aquatic Sciences and Engineering 2022 Vol.37 Issue 3, pp.142-150

Belge Tipi:

Makale

Yayın Tarihi:

6/2022

Belge Dili:

İngilizce

Document ID (Org No.):

2000859727

Sıklık:

Üç Aylık

eISSN:

2602-473X

pISSN:

2602-473X

DOI:

https://doi.org/10.26650/ASE20221074075