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.
References
- Alverson, D.L., Freeberg, M.H., Murawski, S.A. & Pope, J.G. (1994). A global assessment of fisheries bycatch and discards. Fisheries Technical Paper, 339.
- Anonymous, (2002). The State of World Fisheries and Aquaculture. Rome: FAO.
- Anonymous, (2016). Republic of Turkey Ministry of Food, Agriculture and Livestock, Notification of regulating commercial fishery (Notification no: 2016/35). (In Turkish)
- Beitinger, T.L. (1990). Behavioural reactions for the assessment of stress in fishes. Journal of Great Lakes Research, 16, 495-528. DOI: 10.1016/S0380-1330(90)71443-8
- Benoît, H.P., Hurlbut, T., Chassé, J. & Jonsen, I.D. (2012). Estimating fishery-scale rates of discard mortality using conditional reasoning. Fisheries Research, 125, 318-330. DOI: 10.1016/j.fishres.2011.12.004
- Benoît, H.P., Plante, S., Kroiz, M. & Hurlbut, T. (2013). A comparative analysis of marine fish species susceptibilities to discard mortality: effects of environmental factors, individual traits, and phylogeny. ICES Journal of Marine Science, 70(1), 99-113. DOI: 10.1093/icesjms/fss132
- Chopin, F.S. & Arimoto, T. (1995). The condition of fish escaping from fishing gears – a review. Fisheries Research, 21, 315-327. DOI: 10.1016/0165-7836(94)00301-C
- Davis, M.W. & Olla, B.L. (2002). Mortality of Lingcod Towed in a Net as Related to Fish Length, Seawater Temperature, and Air Exposure: A Laboratory Bycatch Study. North American. Journal of Fisheries Management, 22, 1095-1104. DOI: 10.1577/1548-8675(2002)022<1095:MOLTIA>2.0.CO;2
- Davis, M.W. & Ottomar, M.L. (2006). Wounding and reflex impairment may be predictors for mortality in discarded or escaped fish. Fisheries Research, 82, 1-6. DOI: 10.1016/j.fishres.2006.09.004
- Davis, M.W. & Parker, S.J. (2004). Fish size and exposure to air: potential effects on behavioural impairment and mortality rates in discarded sablefish. North American. Journal of Fisheries Management, 24, 518-524. DOI: 10.1577/M03-030.1
- Davis, M.W. (2002). Key principles for understanding fish bycatch discard mortality. Canadian Journal of Fisheries and Aquatic Sciences, 59, 1834-1843. DOI: 10.1139/f02-139
- Davis, M.W. (2005). Behaviour impairment in captured and released sablefish: ecological consequences and possible substitute measures for delayed discard mortality. Journal of Fish Biology, 66, 254-265. DOI: 10.1111/j.0022-1112.2005.00602.x
- Davis, M.W. (2007). Simulated fishing experiments for predicting delayed mortality rates using reflex impairment in restrained fish. Journal of Marine Science, 64, 1535-1542.
- Davis, M.W. (2009). Fish stress and mortality can be predicted using reflex impairment. Fish and Fisheries, 11, 1-11. DOI: 10.1111/j.1467-2979.2009.00331.x
- Demirci, A., Demirci, S. & Şimşek, E. 2012. Trol Balıkçılığında Iskartanın Yaşama İhtimali. Balıkçılık ve Akuatik Bilimler Sempozyumu Özet Kitapçığı, 61.
- Kelleher, K. (2005). Discards in the world’s marine fisheries. FAO Fisheries Technical Paper, 470, 131.
- Saygu, İ. & Deval, M.C. (2014). The Post-Release Survival of Two Skate Species Discarded by Bottom Trawl Fisheries in Antalya Bay, Eastern Mediterranean. Turkish Journal of Fisheries and Aquatic Science, 14, 1-2.
- Schreck, C.B., Olla, B.L. & Davis, M.W. (1997). Behavioural responses to stress, In Fish Stress and Health in Aquaculture. New York. Cambridge University Press, 145-170.
- Şimşek, E. 2012. Trol Balıkçılığında Iskartanın Yaşama İhtimali. Mustafa Kemal Üniversitesi. Fen Bilimleri Enstitüsü Su Ürünleri Anabilim Dalı Yükseklisans Tezi. 28 pp.
- Şimşek, E. & Demirci A. 2016. Analysis of Factors Affecting Life Fate of Groupers after Fishing Operations. Natural and Engineering Sciences, 1(3), 40.
Deneysel yaklaşımla trol simülasyonunda ıskarta edilen çipurada (Sparus aurata Linnaeus, 1758) gecikmiş ölüm
Abstract
Bu çalışmanın amacı sanal bir trol operasyonu gerçekleştirerek yasal
yakalama boyunun altında olan ıskartaların davranış bozukluğu ile gecikmiş ölüm
oranı arasındaki ilişkiyi açıklamaktır. Deneysel trol çekimleri sonrasında 120
balığın davranış bozukluğu, farklı uyarıcılara karşı reflekslerin gözlemi
yoluyla iki farklı metotla test edilmiştir. İlk metotta gözlem tüm balıkların
farklı uyarıcılara karşı reflekslerin gözlemi toplu halde kontrol grupları ile
karşılaştırılırken ikinci metotta refleks testleri bireysel olarak yapılmıştır.
İki metotta da davranış bozukluğunun derecesi olarak alınan refleksler ile
gecikmiş ölüm arasında bir ilişki bulunmuştur. Denize canlı dönen bireylerdeki
ölümlerin önemli bir kısmı yaklaşık 24 saat sonra gerçekleşmektedir. Davranış
bozukluğu ile gecikmiş ölüm arasında doğrusal ilişki bulunmuştur fakat davranış
bozukluğu ne kadar yüksek olursa olsun ölüm belli bir oranda kalmaktadır.
Canlıların önemli bir kısmı laboratuvar ortamındaki kısıtlanan tanklarda
canlığını sürdürmüştür.
References
- Alverson, D.L., Freeberg, M.H., Murawski, S.A. & Pope, J.G. (1994). A global assessment of fisheries bycatch and discards. Fisheries Technical Paper, 339.
- Anonymous, (2002). The State of World Fisheries and Aquaculture. Rome: FAO.
- Anonymous, (2016). Republic of Turkey Ministry of Food, Agriculture and Livestock, Notification of regulating commercial fishery (Notification no: 2016/35). (In Turkish)
- Beitinger, T.L. (1990). Behavioural reactions for the assessment of stress in fishes. Journal of Great Lakes Research, 16, 495-528. DOI: 10.1016/S0380-1330(90)71443-8
- Benoît, H.P., Hurlbut, T., Chassé, J. & Jonsen, I.D. (2012). Estimating fishery-scale rates of discard mortality using conditional reasoning. Fisheries Research, 125, 318-330. DOI: 10.1016/j.fishres.2011.12.004
- Benoît, H.P., Plante, S., Kroiz, M. & Hurlbut, T. (2013). A comparative analysis of marine fish species susceptibilities to discard mortality: effects of environmental factors, individual traits, and phylogeny. ICES Journal of Marine Science, 70(1), 99-113. DOI: 10.1093/icesjms/fss132
- Chopin, F.S. & Arimoto, T. (1995). The condition of fish escaping from fishing gears – a review. Fisheries Research, 21, 315-327. DOI: 10.1016/0165-7836(94)00301-C
- Davis, M.W. & Olla, B.L. (2002). Mortality of Lingcod Towed in a Net as Related to Fish Length, Seawater Temperature, and Air Exposure: A Laboratory Bycatch Study. North American. Journal of Fisheries Management, 22, 1095-1104. DOI: 10.1577/1548-8675(2002)022<1095:MOLTIA>2.0.CO;2
- Davis, M.W. & Ottomar, M.L. (2006). Wounding and reflex impairment may be predictors for mortality in discarded or escaped fish. Fisheries Research, 82, 1-6. DOI: 10.1016/j.fishres.2006.09.004
- Davis, M.W. & Parker, S.J. (2004). Fish size and exposure to air: potential effects on behavioural impairment and mortality rates in discarded sablefish. North American. Journal of Fisheries Management, 24, 518-524. DOI: 10.1577/M03-030.1
- Davis, M.W. (2002). Key principles for understanding fish bycatch discard mortality. Canadian Journal of Fisheries and Aquatic Sciences, 59, 1834-1843. DOI: 10.1139/f02-139
- Davis, M.W. (2005). Behaviour impairment in captured and released sablefish: ecological consequences and possible substitute measures for delayed discard mortality. Journal of Fish Biology, 66, 254-265. DOI: 10.1111/j.0022-1112.2005.00602.x
- Davis, M.W. (2007). Simulated fishing experiments for predicting delayed mortality rates using reflex impairment in restrained fish. Journal of Marine Science, 64, 1535-1542.
- Davis, M.W. (2009). Fish stress and mortality can be predicted using reflex impairment. Fish and Fisheries, 11, 1-11. DOI: 10.1111/j.1467-2979.2009.00331.x
- Demirci, A., Demirci, S. & Şimşek, E. 2012. Trol Balıkçılığında Iskartanın Yaşama İhtimali. Balıkçılık ve Akuatik Bilimler Sempozyumu Özet Kitapçığı, 61.
- Kelleher, K. (2005). Discards in the world’s marine fisheries. FAO Fisheries Technical Paper, 470, 131.
- Saygu, İ. & Deval, M.C. (2014). The Post-Release Survival of Two Skate Species Discarded by Bottom Trawl Fisheries in Antalya Bay, Eastern Mediterranean. Turkish Journal of Fisheries and Aquatic Science, 14, 1-2.
- Schreck, C.B., Olla, B.L. & Davis, M.W. (1997). Behavioural responses to stress, In Fish Stress and Health in Aquaculture. New York. Cambridge University Press, 145-170.
- Şimşek, E. 2012. Trol Balıkçılığında Iskartanın Yaşama İhtimali. Mustafa Kemal Üniversitesi. Fen Bilimleri Enstitüsü Su Ürünleri Anabilim Dalı Yükseklisans Tezi. 28 pp.
- Şimşek, E. & Demirci A. 2016. Analysis of Factors Affecting Life Fate of Groupers after Fishing Operations. Natural and Engineering Sciences, 1(3), 40.
Details
| Primary Language | English |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | September 15, 2018 |
| Submission Date | February 21, 2018 |
| Published in Issue | Year 2018Volume: 35 Issue: 3 |