Biometrical distribution of sharks in a low Elasmobranches-diversified shelf, the eastern Mediterranean Sea

Erhan MUTLU, Mehmet Cengiz DEVAL, Claudia MIGLIETTA, İsmet SAYGU, Ilaria de MEO

Abstract

Spatiotemporal distribution of sharks collected by the Otter trawl in 2009-2001 and 2014-2015 was studied for their biometrical characteristics, and fish assemblage and ecology in shelf-slope of Antalya Gulf. Four species was found only on the shelf, two species from middle shelf to shelf break and three species from shelf edge to shelf break. Scyliorhinus canicula was the most dominant and the most frequently occurred species during 2009-2010 and then occurrence of Scyliorhinus canicula decreased. The rarest species were Etmopterus spinax and Oxynotus centrina. Annual average abundance was above 800 ind/km2 in 2010-2011 and below 50 ind/km2 in 2014-2015. Species richness decreased from winter to spring. Abundance ranged from 5 ind/km2 in June to 964 ind/km2 in August. Sallower zone inhabited lower number of species than the deeper zone. Abundance increased from shallower to the deeper waters. The species had a positive allometric or isometric growth. Unimodal species peaked at 75-100 m and at 300 m. Ubiquitous species had a bimodal distribution. The species were discriminated from the deeper water to the shallower water. The species-environment relation was correlated positively by the bottom depths, followed negatively by Secchi disk depth, and water salinity and positively by near-bottom chl-a and finest bioseston.

Keywords

Elasmobranches, sharks, density distribution, biometry, ecology, eastern Mediterranean Sea

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References

Abella, A. J., & Serena, F. (2005). Comparison of Elasmobranch catches from research trawl surveys and commercial landings at Port of Viareggio, Italy, in the last decade. Journal of Northwest Atlantic Fishery Science 35, 345–356. doi:10.2960/J.v35.m526.

Akyol, O., Ünal, V., & Capapé, C. (2015). Occurrence and Biological Observations on Angel Shark Squatina squatina (Chondrichthyes: Squatinidae) from the Turkish Waters (Eastern Mediterranean). Turkish Journal of Fisheries and Aquatic Science 15, 925-929. doi:10.4194/1303-2712-v15_4_17

Alkusairy H., & Saad A. (2018). Species composition, diversity and length frequency of by-catch sharks from the Syrian Coast. International Journal of Research Studies in Zoology 48(1), 11-21. doi:10.20431/2454-941X.0401003.

Aranha, A., Menezes, G., & Pinho, M. R. (2009). Biological aspects of the velvet belly lantern shark, Etmopterus spinax (Linnaeus, 1758) off the Azores, North East Atlantic. Marine Biology Research, 5(3), 257-267. doi:10.1080/17451000802433175

Barausse, A., Correale, V., Curkovic, A., Finotto, L., Riginella, E., Visentin, E., & Mazzoldi, C. (2014). The role of fisheries and the environment in driving the decline of elasmobranchs in the northern Adriatic Sea. ICES Journal of Marine Science 71(7), 1593–1603. doi:10.1093/icesjms/fst222.

Barría, C., Coll, M., & Navarro, J. (2015). Unravelling the ecological role and trophic relationships of uncommon and threatened elasmobranchs in the western Mediterranean Sea. Marine Ecology Progress Series 539, 225-240. doi:10.3354/meps11494.

Bengil, F., Bengil, E. G. T., Mavruk, S., Hera, O., Karaman, O. D., & Ozaydin, O. (2018). Feeding Ecology of Four Demersal Shark Species (Etmopterus spinax, Galeus melastomus, Scyliorhinus canicula and Squalus blainville) from the Eastern Aegean Sea. Turkish Journal of Fisheries and Aquatic Science 19(6), 475-484. doi:10.4194/1303-2712-v19_6_03.

Bertrand, J., Sola, G.de., Papaconstantinou, L., Relini, C., & Souplet, G. A. (2000). Contribution on the distribution of elasmobranchs in the Mediterranean (from the MEDITS surveys). Biologia Marina Mediterranea 7(1), 385–399.

Bilge, G., Filiz, H., & Tarkan, A. N. (2010). Length-weight relationship of velvet belly lantern shark Etmopterus spinax (Linnaeus, 1758) in Sıgacık Bay (Aegean Sea). Journal of Fisheries and Aquatic Sciences 25(1), 1-8. (in Turkish).

Cannizzaro, L., Rizzo, P., Levi, D., & Gancitano, S. (1995). Age determination and growth of Squalus blainvillei (Risso, 1826). Fisheries Research 23, 113-125. doi:10.1016/0165-7836(94)00333-R.

Capapé, C., Mnasri-Sioudi, N., Kamel-Moutalibi, O. E., Boumaïza. M., Ben Amor. M. M., & Reynaud, C. (2014). Production, Maturity, Reproductive Cycle and Fecundity of Small_Spotted Catshark, Scyliorhinus canicula (Chondrichthyes: Scyliorhinidae) from the Northern Coast of Tunisia (Central Mediterranean). Journal of Ichthyology 54(1), 111–126. doi:10.1134/S0032945214010020.

Capapé, C., Reynaud, C., Vergne, Y., & Quignard, J.-P. (2008). Biological observations on the smallspotted catshark Scyliorhinus canicula (Chondrichthyes: Scyliorhinidae) off the Languedocian coast (southern France, northern Mediterranean). Pan-American Journal of Aquatic Sciences 3(3), 282-289.

Cartes, J. E., Fanelli, E., Lloris, D., & Matallanas, J. (2013). Effect of environmental variations on sharks and other top predators in the deep Mediterranean Sea over the last 60 years. Climate Research 55, 239–251. doi:10.3354/cr01137.

Cau, A. (2008). Relazione finale: Valutazione Risorse Demersali −Gruppo Nazionali Demersali −G.R.U.N.D. −GSA 11 − Mari circostanti la Sardegna. Ministero delle Politiche Agricole Alimentari e Forestali.

Coelho, R., & Erzini, K. (2010). Depth distribution of the velvet belly, Etmopterus spinax, in relation to growth and reproductive cycle: The case study of a deep-water lantern shark with a wide-ranging critical habitat. Marine Biology Research 6, 4, 381-389. doi:10.1080/17451000802644706.

Coll, M., Piroddi, C., Steenbeek, J., Kaschner, K., Lasram, L. B. R., Aguzzi, J., Ballesteros, E., Bianchi, C. N., Corbera, J., Dailianis, T., Danovaro, R., Estrada, E., Froglia, C., Galil, B., Gasol, J. M., Gertwagen, R., Gil, J., Guilhaumon, F., Kesner-Reyes, K., Kitsos, M. S., Koukouras, A., Lampadariou, N., Laxamana, E., Lopez-Fe, C. M., De la C., Lotze, H. K., Martin, D., Mouillot, D., Oro, D., Raicevich, S., Rius-Barile, J., Saiz-Salinas, J.I., Vicente, C.S., Somot, S., Templado, J., Turon, X., Vafidis, D., Villanueva, R., & Voultsiadou, E. (2010). The Biodiversity of the Mediterranean Sea: Estimates, Patterns, and Threats. PLoS ONE 5(8), e11842. doi:10.1371/journal.pone.0011842.

Corsini, M., & Zava B. (2007). Recent capture of Squatina oculata and Squatina aculeata from Sodecanese Islands (SE Aegean Sea, eastern Mediterranean). Biologia Marina Mediterranea 14(2), 352-353.

Costa, M. E., Erzini, K., & Borges, T. C. (2005). Reproductive biology of the blackmouth catshark, Galeus melastomus (Chondrichthyes: Scyliorhinidae) off the south coast of Portugal. Journal of the Marine Biological Association of the United Kingdom 85, 1173-1183. doi:10.1017/S0025315405012270.

D’Onghia, G., Matarrese, A., Tursi, A., & Sio, L. (1995). Observations on the depth distribution pattern of the small-spotted catshark in the North Aegean Sea. Journal of Fish Biology 47, 421–426. doi:10.1111/j.1095-8649.1995.tb01911.x

Damalas, D., & Vassilopoulou, V. (2011). Chondrichthyan by-catch and discards in the demersal trawl fishery of the central Aegean Sea (Eastern Mediterranean). Fisheries Research 108, 142–152. doi:10.1016/j.fishres.2010.12.012.

Darna, S. A., Bendiab, A. A. T., Mouffok, S., Belmahi, A.-E., & Bouderbala, M. (2018). Observation on distribution, biology, growth, diet and feeding strategy of blackmouth catshark Galeus melastomus (Rafinesque, 1810) (Chondrichthyes Scyliorhinidae) in Western Algerian coast. Biodiversity Journal 9(4), 357–368. doi:10.31396/Biodiv.Jour.2018.9.4.357.368.

de Meo, I., Miglietta, C., Mutlu, E., Deval, M. C., Balaban, C., & Olguner, M. T. (2018). Ecological distribution of demersal fish species in space and time on the shelf of Antalya Gulf, Turkey. Marine Biodiversity 48, 2105–2118. doi:10.1007/s12526-017-0739-7.

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. doi:10.7554/eLife.00590.

Ergüden, D., Ayas, D., Gürlek, M., Karan, S., & Turan, C. (2019). First documented smoothback angelshark Squatina oculata Bonaparte, 1840 from the North-Eastern Mediterranean Sea, Turkey. Cahiers de Biologie Marine 60, 189-194. doi:10.21411/CBM.A.23607FF9

Evagelopoulos, A., Batjakas, I., & Koutsoubas, D. (2017). Length–weight relationships of 9 commercial fish species from the North Aegean Sea. Acta Adriatica 58(1), 187–192. doi:10.32582/aa.58.1.15.

Filiz, H. (2019). Year-Round Aggregation of Sandbar Shark, Carcharhinus plumbeus (Nardo, 1827), in Boncuk Cove in the southern Aegean Sea, Turkey (Carcharhiniformes: Carcharhinidae). Zoology in the Middle East 65(1), 35-39. doi:10.1080/09397140.2018.1540148.

Filiz, H., & Bilge, G. (2004). Length–weight relationships of 24 fish species from the North Aegean Sea, Turkey. Journal of Applied Ichthyology 20, 431–432. doi:10.1111/j.1439-0426.2004.00582.x.

Filiz, H., & Mater, S. (2002). A preliminary study on length-weight relationship for seven elasmobranch species from North Aegean Sea, Turkey. Ege Journal of Fisheries and Aquatic Sciences 19, 401-409.

Filiz, H., Yapıcı, S., & Bilge, G. (2018). Chondrichthyan fishes in catch composition of the bottom trawl fishery on the coast of Didim, Turkey. Journal of Black Sea/Mediterranean Environment 24(1), 28-37.

Follesa, M. C., Marongiu, M. F., Zupa, W., Bellodi, A., Cau, A., Cannas, R., Colloca, F., Djurovic, M., Isajlovic, I., Jadaud, A., Manfredi, C., Mulas, A., Peristeraki P., Porcu C., Ramirez-Amaro S., Jiménez F.S., Serena F., Sion L., Thasitis I., Cau A., & Carbonara P. (2019). Spatial variability of Chondrichthyes in the northern Mediterranean. Scientia Marina 83, 81-100. doi:10.3989/scimar.04998.23A.

Fortibuoni, T., Borme, D., Franceschini, G., Giovanardi, O., & Raicevich, S. (2016). Common, rare or extirpated? Shifting baselines for common angelshark, Squatina squatina (Elasmobranchii: Squatinidae), in the Northern Adriatic Sea (Mediterranean Sea). Hydrobiologia 772, 247–259. doi:10.1007/s10750-016-2671-4.

Galván-Magaña, F., Castillo-Geniz, J. L., Hoyos-Padilla, M., Ketchum, J., Klimley, A. P., Ramírez-Amaro, S., Torres-Rojas, Y. E., & Tovar-Ávila, J. (2019). Shark ecology, the role of the apex predator and current conservation status. Advances in Marine Biology 83, 61–114. doi:10.1016/bs.amb.2019.08.005.

Garofalo, G., Gristina, M., Fiorentino, F., Fulgosi, F. C., Norrito, G., & Sinacori, G. (2003). Distributional pattern of rays (Pisces, Rajidae) in the Strait of Sicily in relation to fishing pressure. Hydrobiologia 503, 245-250. doi:10.1023/B:HYDR.0000008487.25578.d4

Garuti A, & Mutlu, E. (2021). Spatiotemporal and ecological distribution of megistobentic non-crustacean invertebrates in an ultra-oligotrophic gulf, the eastern Mediterranean Sea. Journal of Marine Systems 224, 103644. https://doi.org/10.1016/j.jmarsys.2021.

Giovos, I., Arculeo, M., Doumpas, N., Katsada, D., Maximiadi, M., Mitsou, Е., Paravas, V., Aga-Spyridopoulou, R. N., Stoilas, V.-O., Tiralongo, F., Tsamadias, I. Е., Vecchioni, L., & Moutopoulos, D. K. (2020). Assessing multiple sources of data to detect illegal fishing, trade and mislabelling of elasmobranchs in Greek markets. Marine Policy 112, 103730. doi:10.1016/j.marpol.2019.103730.

Gönülal, O. (2017). Length-weight relationships of 16 fish species from deep water of northern Aegean Sea (500-900m). Turkish Journal of Fisheries and Aquatic Science 17, 995-1002. doi:10.4194/1303-2712-v17_5_14

Gouraguine, .A., Hidalgo, M., Moranta, J., Bailey, D. M., Ordines, F., Guijarro, B., Valls, M., Barberá, C., & Mesa, A. De. (2011). Elasmobranch spatial segregation in the western Mediterranean. Scientia Marina 75(4), 653-664. doi:10.3989/scimar.2011.75n4653.

Gravino, F., Dimech, M., & Schembri, P. J. (2010). Feeding habits of the small-spotted catshark Scyliorhınus canicula (l., 1758) in the central Mediterranean. CIESM meeting, Rapp. Comm. int. Mer Médit., 39.

Guijarro, B., Quetglas, A., Moranta, J., Ordines, F., Valls, M., González, N., & Massutí, E. (2012). Inter- and intra-annual trends and status indicators of nektobenthic elasmobranchs off the Balearic Islands (northwestern Mediterranean). Scientia Marina 76(1), 87-96. doi:10.3989/scimar.03432.22A.

Gurbet, R., Akyol, O., Yalcın, E., & Ozaydın, O. (2013). Discards in bottom trawl fishery in the Aegean Sea (Izmir Bay, Turkey). Journal of Applied Ichthyology 29, 1269–1274. doi:10.1111/jai.12243.

Güven, O., Kebapcıoğlu, T., & Deval, M. C. (2012). Length–weight relationships of sharks in Antalya Bay, eastern Mediterranean. Journal of Applied Ichthyology 28, 278–279. doi:10.1111/j.1439-0426.2011.01823.x.

Hemida, F., Seridji, R, Labidi, N., Bensaci, J., & Capapé, C. (2002). Records of Carcharhinus spp. (Chondrichthyes: Carcharhinidae) from off the Algerian coast (southern Mediterranean). Acta Adriatica 43, 83–92.

Holcer, D., & Lazar, B. (2017). New data on the occurrence of the critically endangered common angelshark, Squatina squatina, in the Croatian Adriatic Sea. Natura Croatica 26(2), 313-320. doi:10.20302/NC.2017.26.23

Ismen, A., Yığın, C. C., Altınağaç, U., & Ayaz, A. (2009). Length-weight relationships for ten shark species from Saros Bay (North Aegean Sea). Journal of Applied Ichthyology 25(S1), 109-112. doi:10.1111/j.1439-0426.2009.01263.x.

Ivory, P., Jeal, F., & Nolan C. P. (2004). Age determination, growth and reproduction in the lesser-spotted dogfish, Scyliorhinus canicula (L.). Journal of Northwest Atlantic Fishery Science 35, 89–106. doi:10.2960/J.v35.m504.

Jukic-Peladic, S., Vrgoc, N., Krstulovic-Sifner, S., Piccinetti, C., Piccinetti-Manfrin, G., Marano, G., & Ungaro, N. (2001). Long-term changes in demersal resources of the Adriatic Sea: comparison between trawl surveys carried out in 1948 and 1998. Fisheries Research 53(1), 95–104. doi:10.1016/S0165-7836(00)00232-0.

Kabasakal, H. (2001). Preliminary data on the feeding ecology of some selachians from the north-eastern Aegean Sea. Acta Adriatica 42(2), 15-24.

Kabasakal, H. (2010). Historical and contemporary records of the angular rough shark Oxynotus centrina (Chondrichthyes; Oxynotidae) in Turkish waters. Mediterranean Marine Sciences 11(2), 361-368. . doi:10.12681/mms.84.

Kabasakal, H. (2015). Occurrence of the angular rough shark, Oxynotus centrina (Chondrichthyes: Oxynotidae) in the eastern Mediterranean. Annales, Series Historia Naturalis 25, 1-10.

Kabasakal, H., Karhan, S. Ü., & Sakınan, S. (2017). Review of the distribution of large sharks in the seas of Turkey (Eastern Mediterranean). Cahiers de Biologie Marine 58, 219-228. doi:10.21411/CBM.A.96D9F948.

Kara, A., Saglam, C., Acarli, D., & Cengiz, O. (2018). Length-weight relationships for 48 fish species of the Gediz estuary, in Izmir Bay (Central Aegean Sea, Turkey). Journal of the Marine Biological Association of the United Kingdom 98(4), 879-884. doi:10.1017/S0025315416001879.

Koç, H. T. & Erdoğan, Z. (2018). Length-Weight Relationships, Reproduction, Hepatosomatic Index of The Lesser Spotted Catshark, Scyliorhinus canicula [L.] The Sea of Marmara, Turkey. Journal of Balikesir University Institute of Science and Technology 20(2), 98-108. doi:10.25092/baunfbed.411802.

Kousteni, V., & Megalofonou, P. (2011). Reproductive biology and embryonic development of Squalus blainvillei in the eastern Mediterranean Sea. Scientia Marina 75(2), 237-249. doi:10-3989/scimar.2011.75n2237.

Kousteni, V., Karachle, P. K., & Megalofonou, P. (2017). Diet of the small-spotted catshark Scyliorhinus canicula in the Aegean Sea (eastern Mediterranean). Marine Biology Research 13(2), 161-173. doi:10.1080/17451000.2016.1239019.

Kousteni, V., Karachle, P. K., Megalofonou, P., & Lefkaditou, E. (2018). Cephalopod prey of two demersal sharks caught in the Aegean Sea (eastern Mediterranean). Journal of the Marine Biological Association of the United Kingdom 98(1), 81–88. doi:10.1017/S002531541700159X.

Kousteni, V., Kontopoulou, M., & Megalofonou, P. (2010). Sexual maturity and fecundity of Scyliorhinus canicula (Linnaeus, 1758) in the Aegean Sea. Marine Biology Research 6, 390-398. doi:10.1080/17451000903233771.

Lauria, V., Gristina, M., Attrill, M.J., Fiorentino, F., & Garofalo, G. (2015). Predictive habitat suitability models to aid conservation of elasmobranch diversity in the central Mediterranean Sea. Scientific Reports 5, 13245. doi:10.1038/srep13245 1.

Ligas, A., Bertolini, D., Mancusi, C., Reale, B., Ria, M., Sartor, P., Sbrana, M., Serena, F., Voliani, A., & Ranieri, S. De. (2010). Temporal evolution of landings of elasmobranches in Tuscany (Mediterranean Sea). Biologia Marina Mediterranea 17(1), 220-223.

Mancusi, C., Baino, R., Fortuna, C., De Sola, L., Morey, G., Bradai, M., Kallianotis, A., Soldo, A., Hemida, F., Saad, A., Dimech, M., Peristeraki, P., Bariche, M., Clò, S., De Sabata, E., Castellano, L., Garibaldi, F., Lanteri, L., Tinti, F., Pais, A., Sperone, E., Micarelli, P., Poisson, F., Sion, L., Carlucci, R., Cebrian-Menchero, D., Séret, B., Ferretti, F., El-Far, A., Saygu, I., Shakman, E., Bartoli, A., Guallart, J., Damalas, D., Megalofonou, P., Vacchi, M., Bottaro, M., Notarbartolo Di Sciara, G., Follesa, M., Cannas, R., Kabasakal, H., Zava, B., Cavlan, G., Jung, A., Abudaya, M., Kolitari, J., Barash, A., Joksimovic, A., Marčeta, B., Gonzalez Vilas, L., Tiralongo, F., Giovos, I., Bargnesi, F., Lelli, S., Barone, M., Moro, S., Mazzoldi, C., Charis, C., Abella, A., & Serena, F. (2020). MEDLEM database, a data collection on large Elasmobranchs in the Mediterranean and Black Seas. Mediterranean Marine Science 0, 276-288. doi:10.12681/mms.21148.

Marongiu, M. F., Porcu, C., Bellodi, A., Cannas, R., Carbonara, P., Cau, A., Coluccia, E., Moccia, D., Mulas, A., Pesci, P., & Follesa, M. C. (2020). Abundance, distribution and reproduction of the Data-Deficient species (Squalus blainville) around Sardinia Island (central western Mediterranean Sea) as a contribution to its conservation. Marine and Freshwater Research. doi:10.1071/MF19372.

Marongiu, M. F., Porcu, C., Bellodi, A., Cannas, R., Cau, A., Cuccu, D., Mulas, A., & Follesa, M. C. (2017). Temporal dynamics of demersal chondrichthyan species in the central western Mediterranean Sea: The case study in Sardinia Island. Fisheries Research 193, 81-94. doi:10.1016/j.fishres.2017.04.001.

Marouani, S., Kadri, H., Saidi, B., Morize, E., Bouain, A., & Bradai, M. N. (2012). Age, growth, longevity, natural mortality and maturity of the longnose spurdog, Squalus blainvillei (Chondrichthyes: Squalidae), in the Gulf of Gabès (Central Mediterranean Sea). Cahiers de Biologie Marine 53, 197-204.

McElroy, W. D., Wetherbee, B.M., Mostello, C. S., Lowe, C. G., Crow, G. L., & Wass, R. C. (2006). Food habits and ontogenetic changes in the diet of the sandbar shark, Carcharhinus plumbeus, in Hawaii. Environmental Biology of Fishes 76, 81–92. doi:10.1007/s10641-006-9010-y.

Megalofonou, P., & Damalas, D. (2004). Morphological and biological characteristics of a gravid angular rough shark (Oxynotus centrina) and its embryos from the Eastern Mediterranean Sea. Cybium 28(2), 105-110.

Mnasri, N., Olfa, E. M., Boumaiza, M., Reynaud, C., & Capapé, C. (2012). Food and feeding habits of the small-spotted catshark, Scyliorhinus canicula (Chondrichthyes: Scyliorhinidae) from the northern coast of Tunisia (central Mediterranean). Cahiers de Biologie Marine 53(1), 139-150.

Moranta, J., Quetglas, A., Massutí, E., Guijarro, B., Hidalgo, M., & Diaz, P. (2008). Spatio-temporal variations in deep-sea demersal communities off the Balearic Islands (western Mediterranean). Journal of Marine Systems 71, 346–366. doi:10.1016/j.jmarsys.2007.02.029.

Mulas, A., Bellodi, A., Cannas, R., Carbonara, P., Cau, A.,·Marongiu, M. F., Pesci, P., Porcu, C., & Follesa, M. C. (2019). Resource partitioning among sympatric elasmobranchs in the central‑western Mediterranean continental shelf. Marine Biology 166, 153. doi:10.1007/s00227-019-3607-0.

Mutlu, E., de Meo, I., & Miglietta, C. (2021). Spatio-temporal distribution of pufferfish (Tetraodontidae) along the Turkish coast of the Mediterranean Sea. Mediterranean Marine Science 22(1), 1-19. https://doi.org/10.12681/mms.23481.

Mutlu, E., Deval, M. C., de Meo, I., Saygu, I., & Miglietta, C. (2022). Spatiotemporal density and ecology of batoids (Elasmobranchii) along a Turkish shelf-upper slope of the Mediterranean Sea during years 2009–2015. Thalassas: An International Journal of Marine Sciences. https://doi.org/10.1007/s41208-021-00391-4.

Olaso, I., Velasco, F., Sánchez, F., Serrano, A., Rodríguez-Cabello, C., & Cendrero, O. (2005). Trophic relations of lesser-spotted catshark (Scyliorhinus canicula) and blackmouth catshark (Galeus melastomus) in the Cantabrian Sea. Journal of Northwest Atlantic Fishery Science 35, 481–494. doi:10.2960/J.v35.m494.

Ordines, F., Massutí, E., Moranta, J., Quetglas, A., Guijarro, B., & Fliti, K. (2011). Balearic Islands vs Algeria: two nearby western Mediterranean elasmobranch assemblages with different oceanographic scenarios and fishing histories. Scientia Marina 75(4), 707-717. doi:10.3989/scimar.2011.75n4707.

Özcan, E. İ., & Başusta, N. (2015). Stomach contents of the Lesser Spotted Dogfish, (Scyliorhinus canicula (Linnaeus, 1758)) inhabiting Northeastern Mediterranean. Ege Journal of Fisheries and Aquatic Sciences 32(4), 193-195. doi:10.12714/egejfas.2015.32.4.03.

Özcan, E. I., & Başusta N. (2018a). Preliminary study on age, growth and reproduction of Mustelus mustelus (Elasmobranchii: Carcharhiniformes: Ttriakidae) inhabiting the gulf of Iskenderun, north-eastern Mediterranean Sea. Acta Ichthyologica et Piscatoria 48(1), 27–36. doi:10.3750/AIEP/02295.

Özcan, E. I., & Başusta, N. (2018b). Some population parameters of Scyliorhinus canicula (Linnaeus, 1758) from the northeastern Mediterranean Sea. Journal of Black Sea/Mediterranean Environment 24(1), 51-64.

Öztekin, A., Özekinci, U., & Daban, İ. B. (2016). Length-weight relationships of 26 fish species caught by longline from the Gallipoli peninsula, Turkey (northern Aegean Sea). Cahiers de Biologie Marine 57, 335-342.

Özütemiz, Ş., Kaya, M., & Özaydın, O. (2009). Growth and Feeding Characteristics of Two Sharks Species [Galeus melastomus Rafinesque, 1810 and Squalus blainvillei (Risso, 1826)] from Sığacık Bay (Aegean Sea). Ege Journal of Fisheries and Aquatic Sciences 26(3), 211-217.

Patania, A., & Mutlu, E. (2021). Spatiotemporal and ecological distribution of megabenthic crustaceans on the shelf-shelf break of Antalya Gulf, the eastern Mediterranean Sea. Mediterranean Marine Science 22(3), 446-465. https://doi.org/10.12681/mms.26142.

Pauly, D. (1980) On the interactionships between natural mortality, growth parameters and mean environmental temperature in 175 fish stocks. Conseil Permanent International pour l'Exploration de la Mer 39(3): 175–192.

Porcu, C., Marongiu, M., Follesa, M., Bellodi, A., Mulas, A., Pesci, P., & Cau, A. (2013). Reproductive aspects of the velvet belly lantern shark Etmopterus spinax (Condrichthyes: Etmopteridae), from the central western Mediterranean sea. Notes on gametogenesis and oviducal gland microstructure. Mediterranean Marine Science 15(2), 313-326. doi:10.12681/mms.559.

Poulos, S. E., Drakopoulos, P. G., & Collins, M. B. (1997) Seasonal variability in sea surface oceanographic conditions in the Aegean Sea (Eastern Mediterranean): an overview. Journal of Marine Systems 13(1–4), 225-244. https://doi.org/10.1016/S0924-7963(96)00113-3.

Quigley, D. T. G. (2019). Observations on euryhalinity in the Small-spotted Catshark Sycliorhinus canicula (L.). Porcupine Marine Natural History Society Bulletin 12, 57-62.

Ragonese, S., Nardone, G., Ottonello, D., Gancitano, S., Giusto, G., & Sinacori, G. (2009). Distribution and biology of the Blackmouth catshark Galeus melastomus in the Strait of Sicily (Central Mediterranean Sea). Mediterranean Marine Science 10(1), 55-72. doi:10.12681/mms.122.

Ragonese, S., Vitale, S., Dimech, M., & Mazzola, S. (2013). Abundances of Demersal Sharks and Chimaera from 1994-2009 Scientific Surveys in the Central Mediterranean Sea. PLoS ONE 8(9), e74865. doi:10.1371/journal.pone.0074865.

Ramírez-Amaro, S., Ordines, F., Esteban, A., García, C., Guijarro, B., Salmerón, F., Terrasa, B., & Massutí E. (2020). The diversity of recent trends for chondrichthyans in the Mediterranean reflects fishing exploitation and a potential evolutionary pressure towards early maturation. Scientific Reports 10, 547. doi:10.1038/s41598-019-56818-9.

Saidi, B., Bradai, M. N., & Bouain, A. (2008). Reproductive biology of the smooth-hound shark Mustelus mustelus (L.) in the Gulf of Gabe`s (south-central Mediterranean Sea). Journal of Fish Biology 72, 1343–1354. doi:10.1111/j.1095-8649.2008.01801.x.

Saidi, B., Bradai, M. N., Bouain, A., Guelorget, O., & Capape C. (2005). The reproductive biology of the sandbar shark, Carcharhinus plumbeus (Chondrichthyes: Carcharhinidae), from the Gulf of Gabes (southern Tunisia, central Mediterranean). Acta Adriatica 46(1), 47–62.

Šantić, M., Rađa, B., & Pallaoro, A. (2012). Feeding habits of smallspotted catshark (Scyliorhinus canicula Linnaeus, 1758) from the eastern central Adriatic Sea. Marine Biology Research 8(10), 1003-1011. doi:10.1080/17451000.2012.702912.

Shimazaki, H., & Shinomoto, S. (2007). A method for selecting the bin size of a time histogram. Neural Computation 19, 1503–1527. doi:10.1162/neco.2007.19.6.1503.

Sion, L., D'Onghia, G., Tursi, A, & Mytilineou, C. (2003). First data on distribution and biology of Squalus bainvillei (Risso, 1826) from the Eastern Mediterranean Sea. Journal of Northwest Atlantic Fishery Science 31, 213-219. doi:10.2960/J.v31.a16.

Sisma-Ventura, G., Bialik, O. M., Yam, R., Herut, B., & Silverman, J. (2017). pCO2 variability in the surface waters of the ultra-oligotrophic Levantine Sea: Exploring the air–sea CO2 fluxes in a fast warming region. Marine Chemistry 196, 13-23. http://dx.doi.org/10.1016/j.marchem.2017.06.006.

Soyer, T. (1970). Bionomie benthique du plateau continental de la cote catalane Française. III: Les peuplements de Copepodes Harpacticoides (Crustacea). Vie Et Millieu 21, 377-511.

Stevens, J.D., Bonfil, R., Dulvy, N., & Walker, P. (2000). The effects of fishing on sharks, rays, and chimaeras (chondrichthyans): and the implications for marine ecosystems. ICES Journal of Marine Sciences 57, 476–494. doi:10.1006/jmsc.2000.0724.

Tiralongo, F., Messina, G., & Lombardo, B. (2018). Discards of elasmobranchs in a trammel net fishery targeting cuttlefish, Sepia officinalis Linnaeus, 1758, along the coast of Sicily (central Mediterranean Sea). Regional Studies in Marine Science 20, 60–63. https://doi.org/10.1016/j.rsma.2018.04.002.

Tsimplis, M. N., Zervakis, V., Josey, S. A., Peneva, E. L., Struglia, M. V., Stanev, E. V., Theocharis, A., Lionello, P., Malanotte-Rizzoli, P., Artale, V., Tragou, E., & Oguz, T. (2006). Chapter 4 Changes in the oceanography of the Mediterranean Sea and their link to climate variability. In: Lionello, P., Malanotte-Rizzoli, P., & Boscolo, R. (Eds): Developments in Earth and Environmental Sciences 4, 227-282. https://doi.org/10.1016/S1571-9197(06)80007-8.

Türker, D., Zengin, K., & Tünay, Ö. K. (2018). Length-weigth relationships for nine chondrichthyes fish species from Edremit Bay (North Aegean Sea). Turkish Journal of Fisheries and Aquatic Science 19(1), 71-79. http://doi.org/10.4194/1303-2712-v19_1_09.

Valls, M. A., Ordines, F., & Moranta, J. (2011). Feeding ecology of demersal elasmobranchs from the shelf and slope off the Balearic Sea (western Mediterranean). Scientia Marina 75(4), 633-639. doi:10.3989/scimar.2011.75n4633.

Yağlıoglu, D., Deniz, T., Gurlek, M., Erguden, D., & Turan, C. (2015). Elasmobranch bycatch in a bottom trawl fishery in the Iskenderun Bay, northeastern Mediterranean. Cahiers de Biologie Marine 56, 237-243.

Yemişken, E., Eryılmaz, L., Megalofonou, P., & Yıldız, T. (2019a). Length-weight relationships of nine common demersal Elasmobranch species from the Eastern Mediterranean. Cahiers de Biologie Marine 60, 293-297. doi:10.21411/CBM.A.5F43BEFA.

Yemişken, E., Navarro, J., Forero, M., Megalofonou, P., & Eryilmaz, L. (2019b). Trophic partitioning between abundant demersal sharks coexisting in the North Aegean Sea. Journal of the Marine Biological Association of the United Kingdom 99, 1213–1219. doi:10.1017/S0025315419000110.

Yığın, C. Ç., İşmen, A., & Önal, U. (2016). Occurrence of a rare shark, Oxynotus centrina (Chondrichthyes: Oxynotidae), from Saros Bay, North Aegean Sea, Turkey. Journal of Black Sea/Mediterranean Environment 22(1), 103-109.

Yığın, C.Ç., Işmen, A., Daban, B., Cabbar, K., & Önal, U. (2019). Recent findings of rare sharks, Squatina oculata Bonaparte, 1840 and Squatina squatina (Linnaeus, 1758) from Gökçeada Island, Northern Aegean Sea, Turkey. Journal of Black Sea/Mediterranean Environment 25(3), 305-314.

Zava, B., Fiorentino, F., & Serena, F. (2016). Occurrence of juveniles Squatina oculata Bonaparte, 1840 (Elasmobranchii: Squatinidae) in the Strait of Sicily (Central Mediterranean). Cybium 40(4), 341-343.

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