Some Population Parameters of Picked Dogfish (Squalus acanthias L. 1758) Incidentally Captured in Commercial Fisheries in Southern Black Sea Shores and a First Record of Angular Roughshark (Oxynotus centrina, L. 1758) for Black Sea

Abstract

The study, which aimed to determine some population parameters of picked dogfish (Squalus acanthias L. 1758) distributed in the Black Sea, was carried out in the five fishing seasons (between 2016 and 2023 years). The sharks draw attention as a bycatch for all fishing gear used in the Black Sea. In the study, total length (cm), weight (g) and sex (female/male) data were obtained from the sharks captured with all fishing gears (demersal trawl, midwater trawl, gillnets purse seine, turbot gillnets, trammel nets and bottom) used in commercial fishing activities in the Black Sea of Türkiye. A total of 576 specimens were collected all fishing gears during the sampling period. Length-weight relationship (LWR) was founded as W=0.0097L2.8521 (R2 =0.9854) for all the picked dogfish. Also, mean total length 48.9±0.707 cm respectively. In addition, the first record of the angular roughshark (Oxynotus centrina, L. 1758) species was given for the Black Sea coasts, which originated in the western Atlantic, was seen in the Mediterranean, Aegean Sea and the Marmara Sea of Türkiye. The shark, which was accidentally caught with a purse seine net, measured as 33.5 cm in total length and weighed 585 g.

Keywords

• Shark
• By-catch
• Fishing gears
• Population characteristics
• Black Sea

Ethical Statement

For this type of study, formal consent is not required.

Thanks

We would like to thank the commercial fishermen (small-scale fishery and large-scale fishery) in the Black Sea coasts of Türkiye for their contributions to the collection of fish samples and their support in the field studies.

References

1. Anonymous. (1988). Commercial description of the Black Sea. Head Department of Navigation and Oceanography of the Ministry of. Defence of USSR, Moscow, 139 p.
2. Anonymous. (2020). Regulating Commercial Fisheries in Sea and Inland Waters 5/1 of Number Notification. General Directorate of Fisheries and Aquaculture of Türkiye, Ankara.
3. Aydemir-Çil, E., Birinci-Özdemir, Z., & Özdemir, S. (2023). First find of the starfish, Asterias rubens Linnaeus, 1758, off the Anatolian coast of the Black Sea (Sinop). Marine Biological Journal, 8(3), 97-101. https://doi.org/10.21072/mbj.2023.08.3.07
4. Aydın, M., & Gül, M. (2021). Presence of the Pacific oyster (Crassostrea gigas Thunberg, 1793) in the Black Sea. Journal of Anatolian Environmental and Animal Sciences, 6(1), 14-17. https://doi.org/10.35229/jaes.800160
5. Bargione, G., Donato, F., La Mesa, M., Mazzoldi, C., Riginella, E., Vasapollo, C., Virgili, M., & Lucchetti, A. (2019). Life-history traits of the spiny dogfish Squalus acanthias in the Adriatic Sea. Scientific Reports, 9, 14317. https://doi.org/10.1038/s41598-019-50883-w
6. Barría, C., Navarro, J., Coll, M., Fernancez-Arcaya, U., & Sáez-Liante, R. (2015). Morphological parameters of abundant and threatened Chondrichthyans of the northwestern Mediterranean Sea. Journal of Applied Ichthyology, 31(1), 114-119. https://doi.org/10.1111/jai.12499
7. Bat, L., Şahin, F., Satılmış, H. H., Üstün, F., Özdemir, Z. B., Kıdeyş, A. E., & Shulman, G. E. (2007). The changed ecosystem of the Black Sea and its impact on anchovy fisheries. Journal of FisheriesSciences.com, 1(4), 191-227. https://doi.org/10.3153/jfscom.2007024
8. Bat, L., Sezgin, M., Satılmış, H. H., Şahin, F., Üstün, F., Birinci-Özdemir, Z., & Baki, O. G. (2011). Biological diversity of the Turkish Black Sea coast. Turkish Journal of Fisheries and Aquatic Sciences, 11(4), 683-692. https://doi.org/10.4194/1303-2712-v11_4_04

9. Bilecenoğlu, M., & Öztürk, B. (2018). Possible intrusion of Lagocephalus sceleratus (Gmelin, 1789) to the Turkish Black Sea coast. Journal of the Black Sea / Mediterranean Environment, 24(3), 272-276.
10. Bilecenoğlu, M., Kaya, M., Cihangir, B., & Çiçek, E. (2014). An updated checklist of the marine fishes of Turkey. Turkish Journal of Zoology, 38(6), 901-929. https://doi.org/10.3906/zoo-1405-60
11. Bilecenoğlu, M., Yokeş, M. B., & Aydın, M. (2023). First record of Sebastes schlegelii Hilgendorf, 1880, along the Turkish Black Sea coast – New addition to the alien species inventory. Turkish Journal of Maritime and Marine Sciences, 9(2), 119-128. https://doi.org/10.52998/trjmms.1358814
12. Birinci-Özdemir, Z. (2022). Seasonal occurrence and distribution of gelatinous macrozooplankton of the Sinop Peninsula in the Southern Black Sea. Cahiers de Biologie Marine, 63, 39-49. https://doi.org/10.21411/CBM.A.E62EBB18
13. Bök, T. D., Göktürk, D., Kahraman, A. E., Alicli, T. Z., Acun, T., & Ateş, C. (2011). Length-weight relationships of 34 fish species from the Sea of Marmara, Turkey. Journal of Animal and Veterinary Advances, 10(23), 3037-3042. https://doi.org/10.3923/javaa.2011.3037.3042
14. Bonfil, R. (1994). Overview of world elasmobranch fisheries (No. 341). Food & Agriculture Organization. FAO Fisheries Technical Paper, No: 341, 119p.
15. Bradai, M. N., Saidi, B., & Enajjar, S. (2018). Overview on Mediterranean Shark’s Fisheries: Impact on the Biodiversity.In M. Türkoğlu, U. Önal & A. Ismen (Eds.), Marine ecology - Biotic and abiotic interactions. InTech. https://doi.org/10.5772/intechopen.74923
16. Bradai, M. N., Saidi, B., & Enajjar, S. (2012). Elasmobranchs of the Mediterranean and Black Sea: Status, Ecology and Biology – Bibliographic Analysis. Studies and Reviews, General Fisheries Commission for the Mediterranean, No: 91. Rome: FAO.
17. Cabbar, K., & Yığın, Ç. (2021). Length–weight relationships of Elasmobranch species from Gökçeada Island in the Northern Aegean Sea. Thalassas, 37(2), 497-504. https://doi.org/10.1007/s41208-021-00350-z
18. Cavanagh, R. D., & Gibson, C. (2007). Overview of the Conservation Status of Cartilaginous Fishes (Chondrichthyans) in the Mediterranean Sea. IUCN, Gland, Switzerland and Malaga, Spain. vi + 42 p.
19. Coll, M., Navarro, J., & Palomera, I. (2013). Ecological role, fishing impact, and management options for the recovery of a Mediterranean endemic skate by means of food web models. Biological Conservation, 157, 108-120. https://doi.org/10.1016/j.biocon.2012.06.029
20. Compagno, L. J. V. (1984). FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fisheries Synopsis, Series No. 125, Volume 4, Part 1. FAO.
21. Compagno, L. J. V. (1990). Alternative life-history styles of cartilaginous fishes in time and space. Environmental Biology of Fishes, 28(1-4), 33-75. https://doi.org/10.1007/BF00751027
22. Compagno, L. J. V., Didier, D. A., & Burgess, G. H. (2005). Classification of Chondrichthyan fish. In S. L. Fowler, R. D. Cavanagh, M. Camhi, G. H. Burgess, S. V. Fordham, C. A. Simpfendorfer & J. A. Musick (Eds.), Sharks, Rays and Chimaeras: The Status of the Chondrichthyan Fishes (pp. 4-11). Status Survey, IUCN, Gland.
23. Cortes, E. (2000). Life history patterns and correlations in sharks. Reviews in Fisheries Science, 8(4), 299-344. https://doi.org/10.1080/10408340308951115
24. Coull, K. A., Jermyn, A. S., Newton, A. W., Henderson G. I., & Hall, W. B. (1989). Length/weight relationships for 88 species of fish encountered in the North Atlantic. Vol 43. Scottish fisheries research report. Department of Agriculture and Fisheries for Scotland.
25. Dağtekin, M., Genç, Y., Kasapoğlu, N., Erik, G., Misir, D. S., İlhan, S., Ok, M., Altuntaş, C., Özsandıkçı, U., Büyükdeveci, F., Kaya, T., Cebeci, A., Saltan, A. N., Haşimoğlu, A., & Firidin, Ş. (2022). Length-weight relationships of 28 fish species caught from demersal trawl survey in the Middle Black Sea, Turkey. Turkish Journal of Zoology, 46, 67-73. https://doi.org/10.3906/zoo-2109-21
26. Daskalov, G., & Rätz, H. -J. (Eds) (2011). Scientific, Technical and Economic Committee for Fisheries (STECF) - Opinion by written procedure - Assessment of Black Sea Stocks (STECF-OWP-11-06). EUR 25020 EN. Luxembourg (Luxembourg): Publications Office of the European Union; 2011. JRC67414.
27. Demirhan, S. A., & Seyhan, K. (2007). Life history of picked dogfish, Squalus acanthias (L. 1758), in the southern Black Sea. Fisheries Research, 85(1-2), 210-216. https://doi.org/10.1016/j.fishres.2007.02.009
28. Dragičević, B., Dulčić, J., & Capapé, C. (2009). Capture of a rare shark, Oxynotus centrina (Chondrichthyes: Oxynotidae) in the eastern Adriatic Sea. Journal of Applied Ichthyology, 25(1), 56-59. https://doi.org/10.1111/j.1439-0426.2009.01265.x
29. Dulvy, N. K., Fowler, S. L., Musick, J. A., Cavanagh, R. D., Kyne, P. M., Harrison, L. R., Carlson, J. K., Davidson, L. N. K., Fordham, S. V., Francis, M. P., Pollock, C. M., Simpfendorfer, C. A., Burgess, G. H., Carpenter, K. E., Compagno, L. J. V., Ebert, D. A., Gibson, C., Heupel, M. R., Livingstone, S. R., Sanciangco, J. C., Stevens, J. D., Valenti, S., & White, W. T. (2014). Extinction risk and conservation of the world’s sharks and rays. eLife, 3, e00590. https://doi.org/10.7554/eLife.00590
30. Dutta, S., Maity, A., Chanda, A., Akhand, A., & Hazra, S. (2012). Length weight relationship of four commercially important marine fishes of Northern Bay of Bengal, West Bengal, India. Journal of Applied Environmental Biological Sciences, 2, 52-58.
31. Düzgünes, E., Okumuş, I., Feyzioglu, M., & Sivri, N. (2005). Population parameters of spiny dogfish, Squalus acanthias from the Turkish Black Sea coast and its commercial exploitation in Turkey. In N. Başusta, Ç. Keskin, F. Serena & B. Seret (Eds.), The Proceedings of the International Workshop on Mediterranean Cartilaginous Fish with Emphasis on Southern and Eastern Mediterranean (pp. 1-9). TÜDAV.
32. Ebert, D. A., White, W. T., Goldman, K. J., Compagno, L. J. V., Daly-Engel, T. S., & Ward, R. D. (2010). Resurrection and redescription of Squalus suckleyi (Girard, 1854) from the North Pacific, with comments on the Squalus acanthias subgroup (Squaliformes: Squalidae). Zootaxa, 2612, 22-40. https://doi.org/10.11646/zootaxa.2612.1.2
33. FAO. (2020). FAO Yearbook. Fishery and Aquaculture Statistics 2018. https://doi.org/10.4060/cb1213t
34. Filiz, H., & Bilge, G. (2004). Length–weight relationships of 24 fish species from the North Aegean Sea, Turkey. Journal of Applied Ichthyology, 20(5), 431-432. https://doi.org/10.1111/j.1439-0426.2004.00582.x
35. Filiz, H., & Mater, S. (2002). A preliminary study on length–weight relationships for seven elasmobranch species from North Aegean Sea, Turkey. E.U. Journal of Fisheries and. Aquatic Science, 19, 401-409.
36. Finucci, B., Chartrain, E., De Bruyne, G., Derrick, D., Ducrocq, M., Williams, A. B., & VanderWright, W. J. (2021). Oxynotus centrina. The IUCN Red List of Threatened Species 2021: e.T63141A124462573. Retrieved on September 25, 2023, from https://doi.org/10.2305/IUCN.UK.2021-2.RLTS.T63141A124462573.en
37. Fordham, S., Fowler, Coelho, R. P., Goldman, K., & Francis, M. P. (2016). Squalus acanthias. The IUCN Red List of Threatened Species 2016: e.T91209505A2898271. Retrieved on September 25, 2023, https://doi.org/10.2305/IUCN.UK.2016-1.RLTS.T91209505A2898271.en
38. Froese, R., & Pauly, D. (2023a). FishBase. World Wide Web electronic publication. Retrieved on December 24, 2022, from https://www.fishbase.se/summary/Squalus-acanthias.html
39. Froese, R., & Pauly, D. (2023b). FishBase. World Wide Web electronic publication. Retrieved on June 6, 2023, from https://www.fishbase.se/summary/Oxynotus-centrina
40. 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. https://doi.org/10.3750/AIP2011.41.4.01
41. İşmen, A., Yığın, C. C., Altınağac, U., Ayaz, A. (2009) Length-weight relationships for ten shark species from Saros Bay (North Aegean Sea). Journal of Applied Ichthyology, 25(1), 109-112. https://doi.org/10.1111/j.1439-0426.2009.01263.x
42. Kabasakal, H. (2009). Observations on a rare shark, Oxynotus centrina (Chondrichthyes: Oxynotidae), in the Sea of Marmara (north-western Turkey). Pan-American Journal of Aquatic Sciences, 4(4), 609-612.
43. Kabasakal, H., & Özbek, E.Ö. (2022). Length-weight relation of the angular rough shark, Oxynotus centrina (Linnaeus, 1758) in the Mediterranean Sea. Natural and Engineering Sciences, 7(2), 97-107. https://doi.org/10.28978/nesciences.1159204
44. Karadurmuş, U. (2022). Length–weight relationship and condition factor of sixteen demersal fish species from the southern part of the Marmara Sea, Turkey. Journal of Ichthyology, 62(4), 543-551. https://doi.org/10.1134/S0032945222040105
45. Kasapoğlu, N., & Düzgüneş, E. (2013). Length-weight relationships of marine species caught by five gears from the Black Sea. Mediterranean Marine Science, 15(1), 95-100. https://doi.org/10.12681/mms.463
46. Maximov, V., Nicolaev, S. Radu, G., & Staicu, I. (2008). Estimation of growing parameters for main demersal fish species in the Romanian Marine Area. Recherches Marines, 37, 289-304.
47. Maximov, V., Patras, E., Oprea, L., Radu, G., & Zaharia, T. (2010). The analysis of the evolution of fishing and the biological characteristics of the main species from the Romanian Pontic Basin, between 2000 and 2008. Journal of Environmental Protection and Ecology, 3, 999-1007.
48. Myers, R. A., & Worm, B. (2005). Extinction, survival or recovery of large predatory fishes. Philosophical Transactions of the Royal Society B: Biological Sciences, 360(1453), 13-20. https://doi.org/10.1098/rstb.2004.1573
49. O’Driscoll, R. L., & Bagley, N. W. (2004). Trawl survey of middle depth species in the Southland and Sub-Antarctic areas, November-December 2003 (TAN0317). New Zealand Fisheries Assessment Report 2004/49.
50. Özdemir, S., Özsandıkçı, U., Büyükdeveci, F., & Erdem Y. (2021). Seasonal variations in the length-weight relationships of the thornback ray Raja clavata L., 1758. (Chondrichthyes: Rajidae) from the Turkish Black Sea coast. Acta Zoologica Bulgarica, 73(3), 417-423.
51. Pallaoro, A., Jardas, I., & Santic, M. (2005). Weight-length relationships for 11 Chondrichthyan species in the eastern Adriatic Sea. Cybium, 29(1), 93-96.
52. Pauly, D. (1984). Fish population dynamics in tropical waters: A manual for use with programmable calculators. ICLARM Studies and Reviews, Manila, 8, 1-325.
53. Radu, G., & Maximov, V. (2012). State of the Black Sea spiny dogfish (Squalus acanthias Linnaeus, 1758). GFCM, SAC-SAF Demersal Species, Black Sea Report.
54. Radu, G. (2016). Stock Assessment Form version. GFCM, SAC-SAF Demersal Species, Black Sea Report 64 p. Retrieved on September 25, 2023, from https://gfcmsitestorage.blob.core.windows.net/documents/SAC/SAFs/DemersalSpecies/2016/DGS_GSA_29_2016_BGR_GEO_ROU_RUS_TUR_UKR.pdf
55. Radulescu, V. (2023). Environmental conditions and the fish stocks situation in the Black Sea, between climate change, war, and pollution. Water, 15(1012), 1-22. https://doi.org/10.3390/w15061012
56. Samsun, O., Polat, N., & Gümüş, A. (1995). Orta Karadeniz’de avlanan mahmuzlu camgöz (Squalus acanthias L., 1758)’ün boy–ağırlık ilişkisi. Ege Üniversitesi Su Ürünleri Dergisi, 12(1), 27-36.
57. Serena, F. (2005). Field identification guide to the sharks and rays of the Mediterranean and Black Sea. FAO Species Identification Guide for Fishery Purposes.
58. Silva, J. F., Ellis, J. R., & Ayers, R. A. (2013). Length-weight relationships of marine fish collected from around the British Isles. Science Series Technical Report, CEFAS Lowestoft, No: 150.
59. Stevens, J. D., Bonfil, R., Dulvy, N. K., & Walker, P. A. (2000). The effects of fishing on sharks, rays, and chimaeras (chondrichthyans), and the implications for marine ecosystems. ICES Journal of Marine Science, 57(3), 476-494. https://doi.org/10.1006/jmsc.2000.0724
60. Stevens, J. D., Walker, T. I., Cook, S. F., & Fordham, S. (2005). Threats faced by chondrichthyan fishes. In S. L. Fowler, R. Cavanagh, M. Camhi, G. H. Burgess, G. M. Caillet, S. Fordham, C. A. Simpfendorfer, & J. A. Musick (Eds). Sharks, rays and chimaeras: the status of the Chondrichthyan fishes (pp. 48-57). IUCN Species Survival Commission Shark Specialist Group.
61. Sümer, Ç., Bilgin, S., Bektaş, S., & Satılmış, H. H. (2016). About the record of the black-bellied angler, Lophius budegassa Spinola, 1807, from Sinop coast in the Black Sea, Turkey. Cahiers de Biologie Marine, 57, 167-170.
62. Tserkova, F., Mihneva, V., Pavlova, E., & Penchev, P. (2022). Size and sex structure variations of picked dogfish (Squalus acanthias, Linnaeus, 1758) (Chondrichthyes - Elasmobranchii) in the Western Black Sea. Regional Studies in Marine Science, 52, 102298. https://doi.org/10.1016/j.rsma.2022.102298
63. Üstün, F., & Birinci-Özdemir, Z. (2019). Seasonal distribution of gelatinous macrozooplankton in the Hamsilos Bay, southern Black Sea, Turkey. KSÜ Tarım ve Doğa Dergisi, 22(4), 583-592. https://doi.org/10.18016/ksutarimdoga.vi.511807
64. Wilhelms, I., (2013). Atlas of length-weight relationships of 93 fish and crustacean species from the North Sea and the North-East Atlantic (No. 12). Johann Heinrich von Thünen Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries.
65. Yankova, M., Pavlov, D., Raykov, V., Mihneva, V., & Radu, G., (2011). Length-weight relationships of ten fish species from the Bulgarian Black Sea waters. Turkish Journal of Zoology, 35(2), 265-270. https://doi.org/10.3906/zoo-0912-44
66. Yığın, C. C., & İşmen, A. (2013). Reproductive biology of picked dogfish Squalus acanthias, in the north Aegean Sea. Turkish Journal of Fisheries and Aquatic Sciences, 13(1), 87–94. https://doi.org/10.4194/1303-2712-v13_1_20
67. Zar, J. H. (1996). Biostatistical analysis (3rd ed.). Prentice-Hall.