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Length-Frequency Distribution of European Hake, Merluccius merluccius from 1995 to 2016 in the Sea of Marmara

Year 2019, Volume: 2 Issue: 2, 167 - 172, 27.12.2019

Abstract

In this study, European hake (Merluccius merluccius) is one of the most important demersal species of the Sea of Marmara,
has been subjected to estimate variation in length and size distribution based
on obtained data from Sea of Marmara. A total of 174 bottom trawl hauls were
performed in 19 stations representing the entire Sea of Marmara from 1995 to
2016 (July and November 1995, March and October 1996, December 2009, December
2010, February 2011 and August 2016). The estimation of length-weight
relationships (LWRs) and distribution of length frequency was estimated
according to years and sexes. A total of 5453 speciemens were evaluated. Sex
ratio was calculated as 1:1.2 males to females. Overall length-weight relations
were estimated W=0.006L
3.077 (r2=0.97) for females,
W=0.008L
2.97 (r2=0.95) for males. According to the length
frequency results, observed changes were not significant in size distribution
of the samples between 1995 to 1996 and from 2009 to 2011. However, the median
value of the total lengths of the individuals obtained in the 90s is greater
than the values obtained at the end of the 2000s. The size distributions of the
samples obtained in the 1990s are in a wider range than the size range of
samples in 2000s. Especially in 2009 and 2016, it was observed that the size
distribution was very narrow, also very few large-sized individuals were
obtained. 

Supporting Institution

The Scientific and Technological Research Council of Turkey (TUBITAK)

Project Number

115Y107

Thanks

This study is dedicated to Prof. Erdoğan Okuş, who always will be remembered with his great contribution to the Turkish marine sciences. Authors are grateful to Dr. Ayhan Uysal, the crew of R/V ARAR and R/V ALEMDAR II for their help in samplings.

References

  • Anonymus, (2014). Food and Agriculture Organization (FAO) Fisheries and Aquaculture Department. [Accessed on 14 September 2018] http://www.fao.org/fishery/species/2238/en
  • Anonymus, (2018). Turkish Statistical Institute (TUIK) Fishery statistics 2018. Ankara. [Accessed on 14 September 2018] http://www.tuik.gov.tr
  • Anonymus, (2019). Turkish Statistical Institute (TUIK) Fishery statistics 2018. Ankara. [Accessed on 5 December 2019] http://www.tuik.gov.tr
  • Bok T.D., Goktürk S.D., Kahraman A.E., Alicli T.Z., Acun T, Ates C. (2011). Length-weight relationships of 34 fish species from the Sea of Marmara, Turkey. Journal of Animal and Veterinary Advances. B (23): 3037-3042.
  • Ceyhan T., Akyol O., Erdem M. (2009). Length-weight relationships of fishes from Gökova Bay, Turkey (Aegean Sea). Turkish Journal of Zoology 33: 69-72.
  • Çicek E., Avsar D., Yeldan H., Ozutok M. (2006). Length-weight relationships for 31 teleost fishes caught by bottom trawl net in the Babadil Limani Bight (Northeastern Mediterranean. Journal of Applied Ichthyology 22: 290-292.
  • Demirel N., Murat-Dalkara E. (2012). Weight-length relationships of 28 fish species in the Sea of Marmara. Turkish Journal of Zoology 36: 785-791.
  • Froese R., Tsikliras A.C., Stergiou K.I. (2011). Editorial note on weight–length relations of fishes. Acta Ichthyologica et Piscatoria 41 (4): 261–263.
  • Froese R., Pauly D. (eds.) 2018. FishBase. [Version 06/2018] http://www.fishbase.org
  • Froese R., Thorso, J.T., Reyes Jr., R.B. (2014). A Bayesian approach for estimating length‐weight relationships in fishes. Journal of Applied Ichthyology 30 (1): 78-85.
  • Gül, G. and Demirel, N. (2016). Demersal Fishes and Fisheries in the Sea of Marmara In:The Marmara Sea - Marine Biodiversity, Fisheries, Conservation and Governance,
  • Özsoy, E., Çağatay, M.N., Balkıs, N., Balkıs, N., & Öztürk, B. (eds.) Turkish Marine Research Foundation Press, İstanbul, pp.612-629, ISBN 978-975-8825-34-9, 2016.
  • Gözenç S., Kurter A., Mater K.A, Bilecik N., Adatepe F.M., Uysal A., Orhon S., Kıratlı N., Gümüş E., Demirel S., Yüksek A., Orhon V., Çimen N., Yıldırım V., Dilek M., Kamil Y. and Harun K. (1997). Marmara Denizi'nde ekonomik demersal balıkların stok tayini, The Scientific and Technological Research Council of Turkey (TUBITAK-DEBAG). Final Report, Project No: 13/g.
  • Ilkyaz, A.T., G. Metin, O. Soykan and H.T. Kinacigil. (2008). Length-weight relationship of 62 fish species from the Central Aegean Sea, Turkey. Journal of Applied Ichthyology 24: 699-702.
  • Işmen A., Ozen O., Altinagac U., Ozekinci U., Ayaz A. (2007). Weight-length relationships of 63 fish species in Saros Bay, Turkey. Journal of Applied Ichthyology 23:707-708. Kahraman A.E., Yıldız T., Uzer U., Karakulak F.S. (2017). Age composition, growth and mortality of European Hake Merluccius merluccius (Linnaeus, 1758) (Actinopterygii: Merlucciidae) from the Sea of Marmara, Turkey. Acta Zoologica Bulgarica 69 (3): 377-384.
  • Karakulak F.S., Erk H., Bilgin B. (2006). Length–weight relationships for 47 coastal fish species from the northern Aegean Sea, Turkey. Journal of Applied Ichthyology 22: 274-278.
  • Moutopoulos D.K., Ramfos A., Mouka A., Katselis G. (2013). Length-weight relations of 34 fish species caught by small-scale fishery in Korinthiakos Gulf (Central Greece). Acta Ichthyologica et Piscatoria 43 (1): 57-64.
  • Ricker W.E. (1975). Computation and interpretation of biological statistics of fish populations. Bulletin of the Fisheries Research Board of Canada 191. 382 pp.
  • Santos M.N., Gaspar M.B., Vasconcelos P., Monteiro C.C. (2002). Weight-length relationships for 50 selected fish species of the Algarve coast (southern Portugal). Fisheries Research 59 (1-2): 289-295.
  • Torcu-Koç H., Üstün F., Erdoğan Z., Artüz L. (2012). Species composition of benthic fish fauna in the Sea of Marmara, Turkey. Journal of Applied Ichthyology DOI: 10.1111/j.1439-0426.2012.02037x
  • Yazıcı M.F., İşmen A., Altınağaç U., Ayaz, A. (2006). A study on the catch composition and bycatch of shrimp beam trawl in the Sea of Marmara. E.U. Journal of Fisheries & Aquatic Sciences 23 (3-4): 269-275.

1995-2016 Yılları Arasında Marmara Denizi’nde Berlam Balığının (Merluccius merluccius) Boy Frekans Dağılımı

Year 2019, Volume: 2 Issue: 2, 167 - 172, 27.12.2019

Abstract

Bu çalışma Marmara Denizi’nin en önemli demersal türlerinden biri olan Berlam balığının, (Merluccius merluccius) boy dağılımları ve değişimlerini, boy-ağırlık ilişkilerini belirlemek amacıyla yapılmıştır. Örnekleme; tüm Marmara Denizi’ni temsil eden 19 istasyonda, 1995-2016 seneleri arasında farklı zaman dilimlerinde (Temmuz ve Kasım 1995, Mart ve Ekim 1996, Aralık 2009, Aralık 2010, Şubat 2011 ve Ağustos 2016) gerçekleştirilen 174 adet dip trol örneklemesi ile yapılmıştır. Toplamda 5453 birey incelenerek boy-ağırlık ilişkisi (LWRs) ve boy dağılımı yıllara ve cinsiyete göre değerlendirilmiştir. Cinsiyet oranı 1:1.2 (erkek-dişi) şeklinde belirlenmiştir. Boy-ağırlık ilişkisi dişi bireyler için W=0.006L3.077 (r2=0.97), erkek bireyler için ise W=0.008L2.97 (r2=0.95) olarak hesaplanmıştır. Senelere göre boy dağılımlarındaki değişimlere göre 1995-1996 ve 2009-2011 yılları arasında değişimin anlamlı olmadığı, ancak 90’larda elde edilen bireylerin median değerlerinin 2000’li yılların sonlarına doğru olan bireylerden daha yüksek olduğu görülmüştür. 1990’larda elde edilen bireylerin toplam boy aralıkları 2000’lerdeki bireylerin toplam boy aralıklarından daha geniş bir aralıkta olduğu belirlenmiştir. Özellikle 2009 ve 2016 yıllarında büyüklük dağılımının çok dar olduğu, aynı zamanda çok az sayıda büyük boylu bireyin elde edildiği görülmüştür. LWRs balık biyolojisi araştırmalarının ve balıkçılık yönetimi için gerekli hesaplamaların önemli bir parçasıdır. LWR'ler vücut ağırlığının toplam boydan tahmin edilmesini sağlayabilir ve toplam balık ağırlığı biyokütlenin tahmin edilmesi için gereklidir, bu nedenle avcılığın düzenlenmesine yardımcı olur.

Project Number

115Y107

References

  • Anonymus, (2014). Food and Agriculture Organization (FAO) Fisheries and Aquaculture Department. [Accessed on 14 September 2018] http://www.fao.org/fishery/species/2238/en
  • Anonymus, (2018). Turkish Statistical Institute (TUIK) Fishery statistics 2018. Ankara. [Accessed on 14 September 2018] http://www.tuik.gov.tr
  • Anonymus, (2019). Turkish Statistical Institute (TUIK) Fishery statistics 2018. Ankara. [Accessed on 5 December 2019] http://www.tuik.gov.tr
  • Bok T.D., Goktürk S.D., Kahraman A.E., Alicli T.Z., Acun T, Ates C. (2011). Length-weight relationships of 34 fish species from the Sea of Marmara, Turkey. Journal of Animal and Veterinary Advances. B (23): 3037-3042.
  • Ceyhan T., Akyol O., Erdem M. (2009). Length-weight relationships of fishes from Gökova Bay, Turkey (Aegean Sea). Turkish Journal of Zoology 33: 69-72.
  • Çicek E., Avsar D., Yeldan H., Ozutok M. (2006). Length-weight relationships for 31 teleost fishes caught by bottom trawl net in the Babadil Limani Bight (Northeastern Mediterranean. Journal of Applied Ichthyology 22: 290-292.
  • Demirel N., Murat-Dalkara E. (2012). Weight-length relationships of 28 fish species in the Sea of Marmara. Turkish Journal of Zoology 36: 785-791.
  • Froese R., Tsikliras A.C., Stergiou K.I. (2011). Editorial note on weight–length relations of fishes. Acta Ichthyologica et Piscatoria 41 (4): 261–263.
  • Froese R., Pauly D. (eds.) 2018. FishBase. [Version 06/2018] http://www.fishbase.org
  • Froese R., Thorso, J.T., Reyes Jr., R.B. (2014). A Bayesian approach for estimating length‐weight relationships in fishes. Journal of Applied Ichthyology 30 (1): 78-85.
  • Gül, G. and Demirel, N. (2016). Demersal Fishes and Fisheries in the Sea of Marmara In:The Marmara Sea - Marine Biodiversity, Fisheries, Conservation and Governance,
  • Özsoy, E., Çağatay, M.N., Balkıs, N., Balkıs, N., & Öztürk, B. (eds.) Turkish Marine Research Foundation Press, İstanbul, pp.612-629, ISBN 978-975-8825-34-9, 2016.
  • Gözenç S., Kurter A., Mater K.A, Bilecik N., Adatepe F.M., Uysal A., Orhon S., Kıratlı N., Gümüş E., Demirel S., Yüksek A., Orhon V., Çimen N., Yıldırım V., Dilek M., Kamil Y. and Harun K. (1997). Marmara Denizi'nde ekonomik demersal balıkların stok tayini, The Scientific and Technological Research Council of Turkey (TUBITAK-DEBAG). Final Report, Project No: 13/g.
  • Ilkyaz, A.T., G. Metin, O. Soykan and H.T. Kinacigil. (2008). Length-weight relationship of 62 fish species from the Central Aegean Sea, Turkey. Journal of Applied Ichthyology 24: 699-702.
  • Işmen A., Ozen O., Altinagac U., Ozekinci U., Ayaz A. (2007). Weight-length relationships of 63 fish species in Saros Bay, Turkey. Journal of Applied Ichthyology 23:707-708. Kahraman A.E., Yıldız T., Uzer U., Karakulak F.S. (2017). Age composition, growth and mortality of European Hake Merluccius merluccius (Linnaeus, 1758) (Actinopterygii: Merlucciidae) from the Sea of Marmara, Turkey. Acta Zoologica Bulgarica 69 (3): 377-384.
  • Karakulak F.S., Erk H., Bilgin B. (2006). Length–weight relationships for 47 coastal fish species from the northern Aegean Sea, Turkey. Journal of Applied Ichthyology 22: 274-278.
  • Moutopoulos D.K., Ramfos A., Mouka A., Katselis G. (2013). Length-weight relations of 34 fish species caught by small-scale fishery in Korinthiakos Gulf (Central Greece). Acta Ichthyologica et Piscatoria 43 (1): 57-64.
  • Ricker W.E. (1975). Computation and interpretation of biological statistics of fish populations. Bulletin of the Fisheries Research Board of Canada 191. 382 pp.
  • Santos M.N., Gaspar M.B., Vasconcelos P., Monteiro C.C. (2002). Weight-length relationships for 50 selected fish species of the Algarve coast (southern Portugal). Fisheries Research 59 (1-2): 289-295.
  • Torcu-Koç H., Üstün F., Erdoğan Z., Artüz L. (2012). Species composition of benthic fish fauna in the Sea of Marmara, Turkey. Journal of Applied Ichthyology DOI: 10.1111/j.1439-0426.2012.02037x
  • Yazıcı M.F., İşmen A., Altınağaç U., Ayaz, A. (2006). A study on the catch composition and bycatch of shrimp beam trawl in the Sea of Marmara. E.U. Journal of Fisheries & Aquatic Sciences 23 (3-4): 269-275.
There are 21 citations in total.

Details

Primary Language English
Subjects Structural Biology
Journal Section Research Articles
Authors

Güzin Gül 0000-0001-5888-3211

Ahsen Yüksek 0000-0003-3004-7443

Elif Murat-dalkara 0000-0002-8757-2532

Nazlı Demirel This is me 0000-0003-4542-9276

Project Number 115Y107
Publication Date December 27, 2019
Submission Date October 18, 2019
Published in Issue Year 2019 Volume: 2 Issue: 2

Cite

APA Gül, G., Yüksek, A., Murat-dalkara, E., Demirel, N. (2019). Length-Frequency Distribution of European Hake, Merluccius merluccius from 1995 to 2016 in the Sea of Marmara. Çanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries, 2(2), 167-172.