Yunuslar ile kıyı balıkçılığı arasındaki etkileşim ve azaltılmasında akustik caydırıcı cihaz kullanımı

Emre Namlıtürk; İsmet Balık

doi:10.12714/egejfas.38.1.05

EN TR

Interaction between dolphins and coastal fisheries and using acoustic deterrent in reducing of interaction

Abstract

This study was conducted at the Unye-Ordu coasts of the South-eastern Black Sea, from May 2015 and February 2017, to investigate the frequency of dolphins-bottom gillnet fisheries interactions, the role of using acoustic deterrent in reducing the damage inflicted by the dolphins to the gillnets and to the fish caught in the gillnets. For this purpose, two gillnet sets with similar technical and equipment characteristics were prepared. While one of the groups had acoustic deterrent (active group), the other did not have acoustic deterrent (control group). In the study were used Future Oceans (70 kHz) deterrent. During the study, in only 3 of the 65 fishing trials have determined the interaction of dolphins with gillnets. It was determined that the number of holes in the gillnets caused by the dolphins was 36.3% less in the nets with acoustic deterrent than the control nets. On the other hand, the CPUE value of the whiting was estimated as 2.01 ± 0.23 kg km-1 s-1 in the gillnets with acoustic deterrent and 1.97 ± 0.24 kg km-1 s-1 in the control nets. These results showed that the use of acoustic deterrent does not have a negative effect on the catch of whiting caught in the gillnets.

Keywords

Yunuslar ile kıyı balıkçılığı arasındaki etkileşim ve azaltılmasında akustik caydırıcı cihaz kullanımı

Öz

Bu araştırma, yunusların uzatma ağları ile etkileşim sıklığını, ağlara ve yakalanan balıklara verdiği zararların (depredesyon) azaltılmasında yunus kovucu (akustik cihaz) kullanmanın rolünü araştırmak için Mayıs 2015 - Şubat 2017 tarihleri arasında Güney Doğu Karadeniz’in Ünye-Ordu kıyılarında yürütülmüştür. Bu amaçla, teknik ve donam özellikleri aynı olan iki dip uzatma ağı seti oluşturulmuştur. Gruplardan birincisi yunus kovucuların takıldığı aktif grup, ikincisi yunus kovucu bulunmayan kontrol grubudur. Araştırmada, Future Oceans (70 kHz) marka yunus kovucular kullanılmıştır. Araştırma süresince, toplam 65 avcılık denemesinin sadece 3’ünde yunusların uzatma ağlarıyla etkileşime girdiği tespit edilmiştir. Ağlarla etkileşime giren yunusların sebep olduğu uzatma ağlarındaki delik sayısının, yunus kovucu takılan ağlarda kontrol ağlarına göre %36,3 daha az olduğu belirlenmiştir. Diğer taraftan, mezgit balığı CPUE değeri, yunus kovucu bulunan ağlarda 2,01±0,23 kg km-1 s-1, kontrol ağlarında ise 1,97±0,24 kg km-1 s-1olarak hesaplanmıştır. Bu sonuçlar, uzatma ağlarında yakalanan mezgit balığı miktarı üzerine yunus kovucu kullanımının olumsuz bir etkisinin olmadığını göstermektedir.

Anahtar Kelimeler

Supporting Institution

Ordu Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü

Project Number

TF-1461

Thanks

Bu çalışma, Ordu Üniversitesi Fen Bilimleri Enstitüsü Balıkçılık Tenolojisi Mühendisliği Anabilim Dalı’nda Prof. Dr. İsmet BALIK danışmanlığında Emre NAMLITÜRK tarafından yürütülen Yüksek Lisans Tezi’nden alınmıştır. Çalışma, Ordu Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğünün TF-1461 numaralı projesi ile desteklenmiştir. Desteklerinden dolayı Ordu Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü’ne teşekkür ediyoruz.

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Details

Primary Language

Turkish

Subjects

Fisheries Management

Journal Section

Research Article

Authors

Emre Namlıtürk
0000-0002-3683-9495
Türkiye

İsmet Balık ^*
0000-0003-2168-8572
Türkiye

Publication Date

March 15, 2021

Submission Date

March 28, 2020

Acceptance Date

August 24, 2020

Published in Issue

Year 2021 Volume: 38 Number: 1

DOI

https://doi.org/10.12714/egejfas.38.1.05

IZ

https://izlik.org/JA67AZ43BK

Cite

RIS / Bibtex

APA

Namlıtürk, E., & Balık, İ. (2021). Yunuslar ile kıyı balıkçılığı arasındaki etkileşim ve azaltılmasında akustik caydırıcı cihaz kullanımı. Ege Journal of Fisheries and Aquatic Sciences, 38(1), 43-52. https://doi.org/10.12714/egejfas.38.1.05