Some Morphometric Measurements of the Critically Endangered Angular Rough Shark (Oxynotus centrina (Linnaeus, 1758) Caught by Trammel Nets in the Sea of Marmara

Yusuf ŞEN; Uğur ÖZEKİNCİ

doi:https://doi.org/10.7240/jeps.1053889

Article Details

Some Morphometric Measurements of the Critically Endangered Angular Rough Shark (Oxynotus centrina (Linnaeus, 1758) Caught by Trammel Nets in the Sea of Marmara

Authors:

Yusuf ŞEN | Uğur ÖZEKİNCİ

Publisher:

Marmara University

Main Topics:

Astronomy and allied sciences

Journal:

International Journal of Advances in Engineering and Pure Sciences 2022 Vol.34 Issue 1, pp.141-146

Document Type:

Article

Publication Date:

3/2022

Document Language:

English

Document ID (Org No.):

2000473844

Frequency:

Quarterly

eISSN:

2636-8277

DOI:

https://doi.org/10.7240/jeps.1053889

Abstract:

 

Angular rough shark is a rare occurrence and one of the critically endangered species. In this study, angular rough shark caught as bycatch with trammel nets was investigated in the Southern coasts of the Marmara Sea, Turkey. The weight of this species, which was caught in these nets, was measured as 212 gr due to the degradation by parasites. The actual weight before degradation was determined as 2623 gr from the length-weight relationship formulation. Morphometric measurements of the species were performed and compared with previous studies. As a result, the population structure and biology of critically endangered species, such as limited information about angular rough shark as bycatch in fisheries should be investigated. Fishing methods will prevent catching angular rough sharks are improved and their survival should be ensured through appropriate protective measures.

 

Domuz köpek balığı, nadir bulunan ve kritik yok olma tehlikesi altında bir türdür. Bu çalışmada Marmara Denizi’nin güney kıyılarında fanyalı uzatma ağları ile tesadüfi olarak yakalanan domuz köpek balığı incelenmiştir. Ağlara yakalanan türe parazitik canlıların zarar vermesi nedeniyle ağırlığı 212 gr ölçülmüştür. Bozulmadan önceki gerçek ağırlığının ise boy-ağırlık ilişkisi formülasyonuna göre 2623 gr olduğu belirlenmiştir. Türün morfometrik ölçümleri gerçekleştirilerek, önceki çalışmalar ile karşılaştırılmıştır. Sonuç olarak, balıkçılıkta tesadüfi olarak avlanan, hakkında az bilgi bulunan yok olma tehlikesi altındaki domuz köpek balığı gibi türlerin popülasyon yapısı ve biyolojileri araştırılmalıdır. Bu türlerin ağlara yakalanmasının önüne geçecek avlama teknikleri geliştirilerek, uygun koruma önlemleri ile hayatta kalmaları sağlanmalıdır.

Article Details

Some Morphometric Measurements of the Critically Endangered Angular Rough Shark (Oxynotus centrina (Linnaeus, 1758) Caught by Trammel Nets in the Sea of Marmara

Authors: Yusuf ŞEN | Uğur ÖZEKİNCİ

Publisher: Marmara University

Main Topics: Astronomy and allied sciences

Journal: International Journal of Advances in Engineering and Pure Sciences 2022 Vol.34 Issue 1, pp.141-146

Document Type: Article

Publication Date: 3/2022

Document Language: English

Document ID (Org No.): 2000473844

Frequency: Quarterly

eISSN: 2636-8277

DOI: https://doi.org/10.7240/jeps.1053889

Issues

Authors:

Yusuf ŞEN | Uğur ÖZEKİNCİ

Publisher:

Marmara University

Main Topics:

Astronomy and allied sciences

Journal:

International Journal of Advances in Engineering and Pure Sciences 2022 Vol.34 Issue 1, pp.141-146

Document Type:

Article

Publication Date:

3/2022

Document Language:

English

Document ID (Org No.):

2000473844

Frequency:

Quarterly

eISSN:

2636-8277

DOI:

https://doi.org/10.7240/jeps.1053889