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Effect of hook and bait type on catch per unit effort in the Aegean Sea demersal longline fishery

Year 2021, Volume 38, Issue 2, 181 - 188, 15.06.2021
https://doi.org/10.12714/egejfas.38.2.07

Abstract



This study aimed to determine the impact of hook and bait type on the catch composition and catch per unit effort. Effects of hook and bait types on catch composition, catch per unit effort (CPUE), length and weight distributions in demersal longline fishery were determined by experimental surveys on demersal longline sets in the Aegean Sea. A total of 12 samplings corresponding to 4800 hook fishing effort were performed between April 2014 and September 2014. Two bait types; sardine (Sardina pilchardus) and grooved razor shell (Solen marginatus) and two hook types; J-hook and C-hook were tested. CPUE values were calculated for each species and assessed between different hook-bait combinations. 
A total of 623 individuals were captured belonging to 3 families and 9 species. It was found that more than 60% of total catch was captured by grooved razor shell and more than 50% of the total catch was caught with J type hook. J hook was found to be close to significant (p=0.06) and grooved razor shell was found significant (p=0.02) for CPUE. The effect of bait type was found to be more significant than that of hook type for CPUE and length distribution. Hook-bait combination differed according to species and C hook baited with sardine was determined to be the best combination for Sparus aurata as the most targeted fish in the study area. Discard ratio was calculated to be 34% in terms of weight and 42.5% in terms of total number of individuals for pooled data. The condition value (K) of the species ranged from 1.05 to 1.68 and differed according to bait type. 
Most of the high commercial value species caught with any hook-bait combination experimented within this study are larger than minimum fishing length according to minimum landing size regulations of Turkish fishery and maturity studies.


References

  • Akyol, O. (2003). Retained and trash fish catches of beach-seining in the Aegean coast of Turkey. Turk Journal of Veterinary and Animal Sciences, 27, 1111-1117.
  • Akyol, O., Kınacıgil, H. T. & Şevik, R. (2007). Longline fishery and length-weight relationships for selected fish species in Gökova Bay (Aegean Sea, Turkey). International Journal of Natural and Engineering Sciences, 1, 1-4.
  • Amorim, S., Santos, M., Coelho, R. & Fernandez-Carvalho, J. (2015). Effects of 17/0 circle hooks and bait on fish catches in a southern Atlantic swordfish longline fishery. Aquatic Conservation: Marine and Freshwater Ecosystems, 25(4), 518-533, DOI: 10.1002/aqc.2443
  • Anonymous (2016). 4/1 Numaralı Ticari Amaçlı Su Ürünleri Avcılığının Düzenlenmesi Hakkında Tebliğ [Notification 4/1 on recreational fisheries.] Gıda, Tarım ve Hayvancılık Bakanlığından. [Ministry of Food, Agriculture and Livestock.] Tebliğ No: 2016/35 [Notification No. 2016/35]
  • Anonymous (2017). 2017 Su Ürünleri İstatistikleri [Fisheries Statistics in 2017]. https://www.tuik.gov.tr (accessed date: 12 Sept. 2017).
  • Aydın, İ., Gökçe, G. & Metin, C. (2008). The effects of netting twine on discard rates of commercial red mullet gillnets in Izmir Bay. Turkish Journal of Fisheries and Aquatic Sciences, 8, 373-376.
  • Aydın, I. (2011). Is natural bait type a stochastic process for size and condition of fishes in the recreational fishery of Ιzmir Bay? Mediterranean Marine Science, 12(2), 390-400. DOI: 10.12681/mms.39
  • Aydın, C. M. & Bolat, Y. (2014). The selectivity of different hook size in the bottom longline which used for catching white seabream (Diplodus sargus L., 1758) in Finike Bay. Journal of Fisheries Sciences, 8, 186-193. DOI: 10.3153/jfscom.201423
  • Çekiç, M. & Başusta, N. (2004). Effect on the species selectivity of different bait and hook size in longline in Iskenderun Bay, Eastern Mediterranean Sea. Ege Journal of Fisheries and Aquatic Sciences, 21, 73-77.
  • Coelho, R., Santos, M. N. & Amorim, S. (2012). Effects of hook and bait on targeted and bycatch fishes in an equatorial Atlantic pelagic longline fishery. Bulletin of Marine Science, 88(3), 449-467. DOI: 10.5343/bms.2011.1064
  • Dulcic, J. & Kraljevic, M. (1996). Weight-length relationships for 40 fish species in the eastern Adriatic (Croatian waters). Fisheries Research, 28, 243-251. DOI: 10.1016/0165-7836(96)00513-9
  • Erdem, M. & Akyol, O. (2005). A preliminary study on longlining of swordfish (Xiphias gladius L., 1758) in Fethiye Region (Mediterranean). Ege Journal of Fisheries and Aquatic Sciences, 22, 201-204.
  • FAO (1993). Longline fishing. J.P. George (ed.) Fao training series, no:22 42 pp. FAO Fisheries Department, Rome.
  • Fernandez-Carvalho, J., Coelho, R., Santos, M. N. & Amorim, S. (2015). Effects of hook and bait in a tropical northeast Atlantic pelagic long line fishery: part II- target, by-catch, and discard fish. Fisheries Research, 164, 312-321. DOI: 10.1016/j.fishres.2014.11.009
  • Foster, D. G., Epperly, S. P., Shah, A. K. & Watson, J. W. (2012). Evaluation of hook and bait type on the catch rates in the western North Atlantic Ocean pelagic longline fishery. Bulletin of Marine Science, 88, 529–545. DOI: 10.5343/bms.2011.1081
  • Froese, R. & Pauly, D. (Ed.) (2018). Fish Base. World Wide Web electronic publication. www.fishbase.org, (06/2018).
  • Gilman, E., Zollet, E., Beverly, S., Nakano, H., Davis, K., Shiode, D., Dalzell, P. & Kinan, I. (2006). Reducing sea turtle by-catch in pelagic longline fisheries. Fish and Fisheries, 7(1), 2–23. DOI: 10.1111/j.1467-2979.2006.00196.x
  • Gilman, E., Clarke, S., Brothers, N., Alfaro-Shigueto, J., Mandelman, J., Mangel, J., Peterson, S., Piovano, S., Thomson, N., Dalzell, P., Donoso, M., Goren, M. & Werner, T. (2008). Shark interactions in pelagic longline fisheries. Marine Policy, 32(1), 1–18. DOI: 10.1016/j.marpol.2007.05.001
  • Gökçe, G. & Metin, C. (2007). Landed and discarded catches from commercial prawn trammel net fishery. Journal of Applied Ichthyology, 23, 543-546. DOI: 10.1111/j.1439-0426.2007.00832.x
  • Güçlüsoy, H., Öndes, F. & Tosunoğlu, Z. (2020). The catch characteristics of a set longline fishery in the Foça Special Environmental Protection Area, Turkey. Acta Ichthyology Piscatoria, 50 (3), 247–255. DOI: 10.3750/AIEP/02809
  • Gülşahin, A. & Soykan, O. (2017). Catch composition, length-weight relationship and discard ratios of commercial longline fishery in the Eastern Mediterranean. Cahiers de Biologie Marine, 58, 1-7. DOI: 10.21411/CBM.A.B3268672
  • Kelleher, K. (2005). Discards in the world’s marine fisheries. An update. FAO Fisheries Technical Paper # 470. FAO: Rome. 131 pp.
  • Lewison, R. L., Freeman, S. A. & Crowder, L. B. (2004). Quantifying the effects of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles. Ecology Letters, 7(3), 221–231. DOI: 10.1111/j.1461-0248.2004.00573.x
  • Lilliefors, H. W. (1969). On the Kolmogorov–Smirnov test for the exponential distribution with mean unknown. Journal of the American Statistical Association, 64, 387–389. DOI: 10.1080/01621459.1969.10500983
  • Maktay, C. B. (2012). Effect on catching efficency of different natural bait in Longline fisheries. Master’s Thesis, Science Institute of Ege University, İzmir, Turkey. 38 pp.
  • Metin, G., Ilkyaz, A. T., Soykan, O. & Kınacıgıl, H. T. (2011). Biological characteristics of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the central Aegean Sea. Turkish Journal of Zoology, 35, 307-315. DOI: 10.3906/zoo-0904-4
  • Moutopoulos, D. K. & Stergiou, K. I. (2002). Length-weight and length-length relationships of fish species from the Aegean Sea (Greece). Journal of Applied Ichthyology, 18, 200-203. DOI: 10.1046/j.1439-0426.2002.00281.x
  • Odabaşı, O. B. (2013). Investigation of bycatch composition in longline fisheries in Çanakkale Region. Master’s Thesis, Science Institute of Onsekiz Mart University, Çanakkale, Turkey.
  • Özdemir, S., Ayaz, A., Gurbet, R. & Erdem, Y. (2006). Catch efficiency of bottom long-line used with different hook size and different type bait at dawn and daytime. Anadolu University Journal of Science and Technology, 7, 405-411.
  • Özgül, A., Ulaş, A., Lök, A., Düzbastılar, F. O. & Metin, C. (2015). A comparison of alternative circle hook (Kahle Hook) and J style hook performance in experimental pelagic longline fishery in Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 15, 19-27.DOI : 10.4194/1303-2712-v15_1_03
  • Özyurt, C. E., Sarıhan, E. & Akar, M. (2003). The possibilities of using longline at pike-perch (Sander lucioperca, Bogustkaya & Naseka, 1996) fishing at Seyhan Dam Lake. E.U. Journal of Fisheries & Aquatic Sciences, 20, 43-50.
  • R Core Team (2017). R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria, http://www.R-project.org/
  • Santos, M. N., Coelho, R., Fernandez-Carvalho, J. & Amorim, S. (2012). Effects of hook and bait on sea turtle catches in an Equatorial Atlantic pelagic longline fishery. Bulletin of Marine Science, 88(3), 683–701. DOI: 10.5343/bms.2011.1065
  • Santos, M. N., Coelho, R., Fernandez-Carvalho, J. & Amorim, S. (2013). Effects of 17/0circle hooks and bait on sea turtles bycatch in a Southern Atlantic swordfish longline fishery. Aquatic Conservation: Marine and Freshwater Ecosystems, 23(5), 732–744. DOI: 10.1002/aqc.2324
  • Sistiaga, M., Herrmann, B., Rindahl, L. & Tatone, I. (2018). Effect of bait type and bait size on catch efficiency in the European Hake Merluccius merluccius Longline Fishery. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science, 10(1), 12-23. DOI: 10.1002/mcf2.10007
  • Soykan, C. U., Moore, J. E., Zydelis, R., Crowder, L. B., Safina, C. & Lewison, R. L. (2008). Why study bycatch? An introduction to the theme section on fisheries bycatch. Endangered Species Research, 5, 91–102. DOI: 10.3354/esr00175
  • Soykan, O., İlkyaz, A. T., Metin, G. & Kınacıgil, H. T. (2015). Growth and reproduction of Boops boops, Dentex macrophthalmus, Diplodus vulgaris, and Pagellus acarne (Actinopterygii: Perciformes: Sparidae) from East-Central Aegean Sea, Turkey. Acta Ichthyologica et Piscatoria, 45(1), 39–55. DOI: 10.3750/AIP2015.45.1.05
  • Soykan, O., Aydın, İ. & Kınacıgil, H. T. (2016). A preliminary study on the potential use of an alternative bait for demersal longline fishery; Sepietta sp. Ege Journal of Fisheries and Aquatic Sciences, 33, 163-167. DOI: 10.12714/egejfas.2016.33.2.11
  • Tesch, F. W. (1971). Age and growth. p. 98-130. In: Methods for assesment of fish production in fresh waters. W.E. Ricker (Ed). Blackwell Scientific Publications, Oxford.
  • Ulaş, A. & Düzbastılar, O. F. (2001). Comparison of catch efficiency of different longlines, E.U. Journal of Fisheries & Aquatic Sciences, 18, 175-186.
  • Watson, J. W., Epperly, S. P., Shah, A. K. & Foster, D. G. (2005). Fishing methods to reduce sea turtle mortality associated with pelagic longlines. Canadian Journal of Fisheries and Aquatic Sciences, 62, 965–981. DOI:10.1139/F05-004.

Ege Denizi dip paragat balıkçılığında iğne ve yem tipinin birim çabada av miktarına etkisi

Year 2021, Volume 38, Issue 2, 181 - 188, 15.06.2021
https://doi.org/10.12714/egejfas.38.2.07

Abstract



Bu çalışmada iğne ve yem türlerinin, avlanan balık av kompozisyonu ve birim çabada av miktarı (BÇAM) üzerindeki etkisinin belirlenmesi amaçlanmıştır. İğne ve yem türlerinin av miktarına, birim çabada av miktarına (BÇAM), boy ve ağırlık dağılımlarına etkisi, Ege Denizi’nde kullanılan deneysel dip paragatları ile saptanmıştır. Toplam 12 adet tekrar ile 4800 adet iğne kullanılarak Nisan 2014 ve Eylül 2014 ayları arasında örnekleme yapılmıştır. İki yem tipi olarak Sardalya (Sardina pilchardus) ve Sülünez (Solen marginatus) ve iki iğne tipi olarak J-iğne ve C-iğne test edilmiştir. BÇAM her tür için ve farklı iğne-yem tiplerine göre hesaplanmıştır. 
3 aileye ait farklı 9 türden 623 adet balık yakalanmıştır. Toplam avın %60’ından fazlasının sülünez ve %50’den fazlasının J tipi iğne ile yakalandığı bulunmuştur. BÇAM için J tipi iğne ile avcılık istatistiksel olarak önemli değere yakın (p=0.06) ve sülünez ile avcılık istatistiksel olarak önemli (p=0.02) bulunmuştur. Yem türünün BÇAM ve balık boyutu üzerindeki etkisi, iğne türünden daha önemli bulunmuştur. İğne-yem kombinasyonu türlere göre farklılık göstermektedir ve sardalya ile yemlenen C tipi iğne, çalışma alanında en çok hedeflenen balık olan Sparus aurata için en iyi kombinasyon olarak belirlenmiştir. Toplanan veriler için ıskarta oranı ağırlığa göre % 34.0 toplam tür sayısı açısından% 42.5 olarak hesaplanmıştır. Türlerin kondüsyon değeri (K) 1.05 ile 1.68 arasında değişmekte ve yem türüne göre farklılık göstermektedir. Bu çalışmada kullanılan iğne-yem kombinasyonu ile yakalanmış yüksek ticari değeri bulunan türlerin çoğu, yasal avlanma boyu ve cinsi olgunluk çalışmalarına göre, minimum avlanma boyundan büyüktür.


References

  • Akyol, O. (2003). Retained and trash fish catches of beach-seining in the Aegean coast of Turkey. Turk Journal of Veterinary and Animal Sciences, 27, 1111-1117.
  • Akyol, O., Kınacıgil, H. T. & Şevik, R. (2007). Longline fishery and length-weight relationships for selected fish species in Gökova Bay (Aegean Sea, Turkey). International Journal of Natural and Engineering Sciences, 1, 1-4.
  • Amorim, S., Santos, M., Coelho, R. & Fernandez-Carvalho, J. (2015). Effects of 17/0 circle hooks and bait on fish catches in a southern Atlantic swordfish longline fishery. Aquatic Conservation: Marine and Freshwater Ecosystems, 25(4), 518-533, DOI: 10.1002/aqc.2443
  • Anonymous (2016). 4/1 Numaralı Ticari Amaçlı Su Ürünleri Avcılığının Düzenlenmesi Hakkında Tebliğ [Notification 4/1 on recreational fisheries.] Gıda, Tarım ve Hayvancılık Bakanlığından. [Ministry of Food, Agriculture and Livestock.] Tebliğ No: 2016/35 [Notification No. 2016/35]
  • Anonymous (2017). 2017 Su Ürünleri İstatistikleri [Fisheries Statistics in 2017]. https://www.tuik.gov.tr (accessed date: 12 Sept. 2017).
  • Aydın, İ., Gökçe, G. & Metin, C. (2008). The effects of netting twine on discard rates of commercial red mullet gillnets in Izmir Bay. Turkish Journal of Fisheries and Aquatic Sciences, 8, 373-376.
  • Aydın, I. (2011). Is natural bait type a stochastic process for size and condition of fishes in the recreational fishery of Ιzmir Bay? Mediterranean Marine Science, 12(2), 390-400. DOI: 10.12681/mms.39
  • Aydın, C. M. & Bolat, Y. (2014). The selectivity of different hook size in the bottom longline which used for catching white seabream (Diplodus sargus L., 1758) in Finike Bay. Journal of Fisheries Sciences, 8, 186-193. DOI: 10.3153/jfscom.201423
  • Çekiç, M. & Başusta, N. (2004). Effect on the species selectivity of different bait and hook size in longline in Iskenderun Bay, Eastern Mediterranean Sea. Ege Journal of Fisheries and Aquatic Sciences, 21, 73-77.
  • Coelho, R., Santos, M. N. & Amorim, S. (2012). Effects of hook and bait on targeted and bycatch fishes in an equatorial Atlantic pelagic longline fishery. Bulletin of Marine Science, 88(3), 449-467. DOI: 10.5343/bms.2011.1064
  • Dulcic, J. & Kraljevic, M. (1996). Weight-length relationships for 40 fish species in the eastern Adriatic (Croatian waters). Fisheries Research, 28, 243-251. DOI: 10.1016/0165-7836(96)00513-9
  • Erdem, M. & Akyol, O. (2005). A preliminary study on longlining of swordfish (Xiphias gladius L., 1758) in Fethiye Region (Mediterranean). Ege Journal of Fisheries and Aquatic Sciences, 22, 201-204.
  • FAO (1993). Longline fishing. J.P. George (ed.) Fao training series, no:22 42 pp. FAO Fisheries Department, Rome.
  • Fernandez-Carvalho, J., Coelho, R., Santos, M. N. & Amorim, S. (2015). Effects of hook and bait in a tropical northeast Atlantic pelagic long line fishery: part II- target, by-catch, and discard fish. Fisheries Research, 164, 312-321. DOI: 10.1016/j.fishres.2014.11.009
  • Foster, D. G., Epperly, S. P., Shah, A. K. & Watson, J. W. (2012). Evaluation of hook and bait type on the catch rates in the western North Atlantic Ocean pelagic longline fishery. Bulletin of Marine Science, 88, 529–545. DOI: 10.5343/bms.2011.1081
  • Froese, R. & Pauly, D. (Ed.) (2018). Fish Base. World Wide Web electronic publication. www.fishbase.org, (06/2018).
  • Gilman, E., Zollet, E., Beverly, S., Nakano, H., Davis, K., Shiode, D., Dalzell, P. & Kinan, I. (2006). Reducing sea turtle by-catch in pelagic longline fisheries. Fish and Fisheries, 7(1), 2–23. DOI: 10.1111/j.1467-2979.2006.00196.x
  • Gilman, E., Clarke, S., Brothers, N., Alfaro-Shigueto, J., Mandelman, J., Mangel, J., Peterson, S., Piovano, S., Thomson, N., Dalzell, P., Donoso, M., Goren, M. & Werner, T. (2008). Shark interactions in pelagic longline fisheries. Marine Policy, 32(1), 1–18. DOI: 10.1016/j.marpol.2007.05.001
  • Gökçe, G. & Metin, C. (2007). Landed and discarded catches from commercial prawn trammel net fishery. Journal of Applied Ichthyology, 23, 543-546. DOI: 10.1111/j.1439-0426.2007.00832.x
  • Güçlüsoy, H., Öndes, F. & Tosunoğlu, Z. (2020). The catch characteristics of a set longline fishery in the Foça Special Environmental Protection Area, Turkey. Acta Ichthyology Piscatoria, 50 (3), 247–255. DOI: 10.3750/AIEP/02809
  • Gülşahin, A. & Soykan, O. (2017). Catch composition, length-weight relationship and discard ratios of commercial longline fishery in the Eastern Mediterranean. Cahiers de Biologie Marine, 58, 1-7. DOI: 10.21411/CBM.A.B3268672
  • Kelleher, K. (2005). Discards in the world’s marine fisheries. An update. FAO Fisheries Technical Paper # 470. FAO: Rome. 131 pp.
  • Lewison, R. L., Freeman, S. A. & Crowder, L. B. (2004). Quantifying the effects of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles. Ecology Letters, 7(3), 221–231. DOI: 10.1111/j.1461-0248.2004.00573.x
  • Lilliefors, H. W. (1969). On the Kolmogorov–Smirnov test for the exponential distribution with mean unknown. Journal of the American Statistical Association, 64, 387–389. DOI: 10.1080/01621459.1969.10500983
  • Maktay, C. B. (2012). Effect on catching efficency of different natural bait in Longline fisheries. Master’s Thesis, Science Institute of Ege University, İzmir, Turkey. 38 pp.
  • Metin, G., Ilkyaz, A. T., Soykan, O. & Kınacıgıl, H. T. (2011). Biological characteristics of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the central Aegean Sea. Turkish Journal of Zoology, 35, 307-315. DOI: 10.3906/zoo-0904-4
  • Moutopoulos, D. K. & Stergiou, K. I. (2002). Length-weight and length-length relationships of fish species from the Aegean Sea (Greece). Journal of Applied Ichthyology, 18, 200-203. DOI: 10.1046/j.1439-0426.2002.00281.x
  • Odabaşı, O. B. (2013). Investigation of bycatch composition in longline fisheries in Çanakkale Region. Master’s Thesis, Science Institute of Onsekiz Mart University, Çanakkale, Turkey.
  • Özdemir, S., Ayaz, A., Gurbet, R. & Erdem, Y. (2006). Catch efficiency of bottom long-line used with different hook size and different type bait at dawn and daytime. Anadolu University Journal of Science and Technology, 7, 405-411.
  • Özgül, A., Ulaş, A., Lök, A., Düzbastılar, F. O. & Metin, C. (2015). A comparison of alternative circle hook (Kahle Hook) and J style hook performance in experimental pelagic longline fishery in Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 15, 19-27.DOI : 10.4194/1303-2712-v15_1_03
  • Özyurt, C. E., Sarıhan, E. & Akar, M. (2003). The possibilities of using longline at pike-perch (Sander lucioperca, Bogustkaya & Naseka, 1996) fishing at Seyhan Dam Lake. E.U. Journal of Fisheries & Aquatic Sciences, 20, 43-50.
  • R Core Team (2017). R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria, http://www.R-project.org/
  • Santos, M. N., Coelho, R., Fernandez-Carvalho, J. & Amorim, S. (2012). Effects of hook and bait on sea turtle catches in an Equatorial Atlantic pelagic longline fishery. Bulletin of Marine Science, 88(3), 683–701. DOI: 10.5343/bms.2011.1065
  • Santos, M. N., Coelho, R., Fernandez-Carvalho, J. & Amorim, S. (2013). Effects of 17/0circle hooks and bait on sea turtles bycatch in a Southern Atlantic swordfish longline fishery. Aquatic Conservation: Marine and Freshwater Ecosystems, 23(5), 732–744. DOI: 10.1002/aqc.2324
  • Sistiaga, M., Herrmann, B., Rindahl, L. & Tatone, I. (2018). Effect of bait type and bait size on catch efficiency in the European Hake Merluccius merluccius Longline Fishery. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science, 10(1), 12-23. DOI: 10.1002/mcf2.10007
  • Soykan, C. U., Moore, J. E., Zydelis, R., Crowder, L. B., Safina, C. & Lewison, R. L. (2008). Why study bycatch? An introduction to the theme section on fisheries bycatch. Endangered Species Research, 5, 91–102. DOI: 10.3354/esr00175
  • Soykan, O., İlkyaz, A. T., Metin, G. & Kınacıgil, H. T. (2015). Growth and reproduction of Boops boops, Dentex macrophthalmus, Diplodus vulgaris, and Pagellus acarne (Actinopterygii: Perciformes: Sparidae) from East-Central Aegean Sea, Turkey. Acta Ichthyologica et Piscatoria, 45(1), 39–55. DOI: 10.3750/AIP2015.45.1.05
  • Soykan, O., Aydın, İ. & Kınacıgil, H. T. (2016). A preliminary study on the potential use of an alternative bait for demersal longline fishery; Sepietta sp. Ege Journal of Fisheries and Aquatic Sciences, 33, 163-167. DOI: 10.12714/egejfas.2016.33.2.11
  • Tesch, F. W. (1971). Age and growth. p. 98-130. In: Methods for assesment of fish production in fresh waters. W.E. Ricker (Ed). Blackwell Scientific Publications, Oxford.
  • Ulaş, A. & Düzbastılar, O. F. (2001). Comparison of catch efficiency of different longlines, E.U. Journal of Fisheries & Aquatic Sciences, 18, 175-186.
  • Watson, J. W., Epperly, S. P., Shah, A. K. & Foster, D. G. (2005). Fishing methods to reduce sea turtle mortality associated with pelagic longlines. Canadian Journal of Fisheries and Aquatic Sciences, 62, 965–981. DOI:10.1139/F05-004.

Details

Primary Language English
Subjects Fisheries
Journal Section Articles
Authors

Ozan SOYKAN
EGE ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ
0000-0002-2227-1245
Türkiye


Cemil SAĞLAM (Primary Author)
ORDU ÜNİVERSİTESİ, FATSA DENİZ BİLİMLERİ FAKÜLTESİ
0000-0003-1430-1579
Türkiye


İlker AYDIN
EGE ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ
0000-0003-1752-2780
Türkiye


H. Tuncay KINACIGİL
EGE ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ
0000-0001-5707-1684
Türkiye

Supporting Institution TUBİTAK
Project Number 213O269
Thanks We would like to thank the Scientific and Technological Research Council of Turkey (TÜBİTAK, Project No:213O269) for its financial support.
Publication Date June 15, 2021
Application Date August 13, 2020
Acceptance Date January 25, 2021
Published in Issue Year 2021, Volume 38, Issue 2

Cite

APA Soykan, O. , Sağlam, C. , Aydın, İ. & Kınacıgil, H. T. (2021). Effect of hook and bait type on catch per unit effort in the Aegean Sea demersal longline fishery . Ege Journal of Fisheries and Aquatic Sciences , 38 (2) , 181-188 . DOI: 10.12714/egejfas.38.2.07