The delayed mortality of discarded sea bream (Sparus aurata Linnaeus, 1758) in trawl simulation: an experimental appraisal
Abstract
This study aims to bring to light behavioral impairment and the delayed mortality of discards below legal catch rate in a simulated trawl operation. Behavioral impairment of 126 fish in the aftermath of trawling operation was tested in two different methods through observing their reflexes. In the first method, all the fish in the tank was compared with the control groups on account of their responds to different stimulants, while in the second method, reflex measurement was individually carried out. Reflexes from these two processes were taken as the extent of behavioral impairment and a relation with delayed mortality was established. A considerable number of fatalities among those returning to the water came about within 24 hours. There was a proportional connection between behavioral impairment and delayed mortality. However high the behavioral impairment might be, the mortality rate remained at a certain proportion. A considerable number of fish survived under confined medium in the laboratory tanks.
Keywords
Kaynakça
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Ayrıntılar
Birincil Dil
İngilizce
Konular
-
Bölüm
Araştırma Makalesi
Yazarlar
Aydın Demirci
*
Iskenderun Technical University, Marine Sciences and Technology Faculty, Department of Marine Technologies
0000-0002-7168-9904
Türkiye
Emrah Şimşek
Iskenderun Technical University, Marine Sciences and Technology Faculty, Department of Marine Technologies
0000-0001-7066-2534
Türkiye
Yayımlanma Tarihi
15 Eylül 2018
Gönderilme Tarihi
21 Şubat 2018
Kabul Tarihi
4 Nisan 2018
Yayımlandığı Sayı
Yıl 2018 Cilt: 35 Sayı: 3
Cited By
Barotrauma treatment performance of fish release devices and its effects on fishing operations
Ege Journal of Fisheries and Aquatic Sciences
https://doi.org/10.12714/egejfas.2019.36.2.06