Reproductive Biology of Spiny Dogfish Squalus acanthias, in the North Aegean Sea

Yıl 2013, Cilt: 13 Sayı: 1, - , 01.02.2013

C. Cigdem Yigin Ali Ismen

https://doi.org/10.4194/1303-2712-v13_1_20

Öz

A total number of 620 Squalus acanthias was sampled from the bottom trawl catches in the North Aegean Sea, Saros Bay from February 2005 to September 2008. The overall F/M ratio was 1.26:1. Females ranged from 17.1 cm to 117.5 cm in total length (TL) and males from 20.8 cm to 121.6 cm. Females showed positive allometric growth (b>3) while males indicated negative allometric growth (b<3). There were statistically significant differences in the relationship for total mass versus TL, and liver mass versus TL between males and females. The smallest sexually mature female was 54.5 cm in TL, while the smallest sexually mature male was 52 cm in TL. Mean length at 50% maturity was estimated at 56.4 cm for females and 52.8 cm for males. The diameter of the yolky oocytes ranged between 0.5 mm and 46 mm, while the mass ranged between 0.01 and 36.24 g. Hepatosomatic index (HSI) and gonadosomatic index (GSI) significanly increased with size in both males and females. While the ranges of HSI and GSI values for males ranged between 1.93-14.09% and 0.01-34.35%, those for females ranged between 1.63-17.17% and 0.01-96.50%, respectively. HSI reached the highest values in both sub-adult and adult specimens, reflecting the role of the liver in the gonadal production.

Anahtar Kelimeler

Elasmobranchii, Saros Bay, maturity, reproductive cycle. Kuzey Ege Denizi’ndeki Mahmuzlu Camgöz (Squalus acanthias)’ün Üreme Biyolojisi

Reproductive Biology of Spiny Dogfish Squalus acanthias, in the North Aegean Sea

Öz

Kuzey Ege Denizi, Saros Körfezi’nde, Şubat 2005-Eylül 2008 tarihleri arasında, dip trolü ile toplam 620 adet Squalus acanthias örneklenmiştir. Örneklerin tümünde cinsiyet oranları 1.26:1’dir. Dişilerin toplam boyları 17,1’den 117,5 cm’e, erkeklerin ise 20,8’den 121,6 cm’e değişim göstermiştir. Dişiler pozitif allometrik büyüme (b>3), erkekler negatif allometrik büyüme göstermiştir (b<3). Erkekler ve dişiler arasında, toplam boy-toplam ağırlık ve karaciğer ağırlığı-toplam boy ilişkileri istatistiksel olarak önemli derecede bulunmuştur. Cinsi olgunluğa erişen en küçük dişi 54,5 cm toplam boya sahipken, cinsi olgunluğa erişen en küçük erkek 52 cm toplam boydadır. Bireylerin %50’de ulaştığı ilk cinsi olgunluk boyu dişilerde 56,4 cm iken, erkeklerde 52,8 cm’dir. Oositlerin ağırlıkları 0,01 ile 36,24 g arasında değişim gösterirken, çapları 0,5 mm ve 46 mm arasında olduğu belirlenmiştir. Hepatosomatik indeks (HSI) ve gonadosomatik indeks (GSI) değerleri, hem dişi hem erkeklerin boyları ile önemli derecede artış göstermiştir. HSI ve GSI değerleri sırasıyla, erkeklerde 1,93-14,09% ve 0,0134,35% arasında değişirken, dişilerde 1,63-17,17% ve 0,01-96,50% arasında değişim göstermiştir. Karaciğerin üreme dönemine etkisinden dolayı, HSI değerleri hem yetişmekte olan hem de yetişkin bireylerde en yüksek değerine ulaşmıştır.

Anahtar Kelimeler

Kıkırdaklı balıklar, Saros Körfezi, olgunluk, üreme zamanı.

Kaynakça

• Altuğ, G., Aktan-Turan, Y., Oral, M., Topaloğlu, B., Dede, A., Keskin, Ç., İşinibilir, M., Çiftçi, P.S. and Tonay, A.M. 2007. Kuzey Ege ve Güney Marmara Denizi biyolojik çeşitliliğinin fiziksel, kimyasal ve biyolojik verilerle değerlendirilmesi. The Scientific and Technological Research Council of Turkey, TÜBİTAK Project Number: 105Y039, 143 pp.
• Avsar, D. 2001. Age, growth, reproduction and feeding of the spurdog (Squalus acanthias Linnaeus, 1758) in the South-eastern Black Sea. Estuarine, Coastal and Shelf Science, 52: 269-278. doi: 10.1006/ecss.2000.0749.
• Bilecenoglu, M., Taskavak, E., Mater, S. and Kaya, M. 200 Checklist of the marine fishes of Turkey. Zootaxa, 113: 1-194. Braccini, J.M., Gillanders, B.M. and Walker, T.I. 2006. Determining reproductive parameters for population assessments of chondrichthyan species with asynchronous ovulation and parturition: piked spurdog (Squalus megalops) as a case study. Marine and Freshwater Research, 57(1): 105-119.
• Capapé, C., Diatta, Y., Diop, M., Guélorget, O., Vergne, Y. and Quignard, J.P. 2006. The reproductive biology of the milk shark, Rhizoprionodon acutus (Rüppell, 1837) (Chondrichthyes: Carcharhinidae) from the coast of Senegal (Eastern Tropical Atlantic). Acta Adriatica 47: 111-126. Udc: 597.33: 591.16 (261-15). Capapé, C. and Reynaud, C. 2011. Maturity, reproductive cycle and fecundity of the spiny dogfish Squalus acanthias (Chondrichthyes: Squalidae) off the Languedocian coast (southern France, northern Mediterranean). Journal of the Marine Biological Association of the United Kingdom, 91(8): 162716 doi:10.1017/S0025315411000270.
• Carrier, J.C., Musick, J.A. and Heithaus, M.R. 2010. Sharks and Their Relatives II-Biodiversity, Adaptive Physiology and Conservation. CRC Press, Boca Raton, 713 pp.
• Chatzispyrou, A. and Megalofonou, P. 2005. Sexual maturity, fecundity and embryonic development of the spiny dogfish, Squalus acanthias, in the eastern Mediterranean Sea. Journal of the Marine Biological Association of the United Kingdom, 85: 1155-1161. doi: 1017/S0025315405012233.
• Collenot, G. 1969. Etude biométrique de la croissance relative des ptérygopodes chez la rousette Scyliorhinus canicula L. Cahiers de Biologie Marine, 10: 309-329.
• 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 I. Hexanchiformes to Lamniformes. FAO Fisheries Synopsis (125), 4(1): 111-113.
• Cortès, E. 2002. Incorporation of uncertainty into demographic modelling: application to shark populations and their conservation. Conservation Biology, 16: 1048-1062. doi: 10.1046/j.1523172002.00423.x.
• Demirhan, S.A. and Seyhan, K. 2006. Seasonality of reproduction and embryonic growth of spiny dogfish (Squalus acanthias L., 1758) in the eastern Black Sea. Turkish Journal of Zoology, 30: 433-443.
• Demirhan, S.A. and Seyhan, K. 2007. Life history of spiny dogfish, Squalus acanthias (L. 1758) in the southern Black Sea. Fisheries Research, 85: 210-216. doi: 1016/j.fishres.2007.02.009.
• Düzgüneş, E., Okumus, I., Feyzioglu, M. and Sivri, N. 200 Population parameters of spiny dogfish, Squalus acanthias from the Turkish Black Sea Coast and its commercial exploitation in Turkey. In: N. Basusta, Ç. Keskin, F. Serena, B. Seret, (Eds.), the Proceedings of the International Workshop on Mediterranean Cartilaginous Fish with Emphasis on Southern and Eastern Mediterranean. Istanbul: 1-9. Filiz, H. and Mater, S. 2002. A preliminary study on length–weight relationships for seven elasmobranch species from North Aegean Sea, Turkey. E.U. Journal of Fisheries Aquatic Sciences, 19: 401–409.
• Filiz, H. and Bilge, G. 2004. Length-weight relationships of 24 fish species from the North Aegean Sea, Turkey. Short communication, Journal of Applied Ichthyology, 20: 431-432. doi: 10.1111/j.1439-0426. 20000582.x.
• Fischer, W., Bauchot, M.L., Schneider, M. 1987. Fiches FAO d’identification des espèces pour les besoins de la pêche (Revision 1). Méditerranée et mer Noire. Zone de pêche, Vertèbres, FAO, Rome, 37(II): 76115
• Ford, E. 1921. A contribution to our knowledge of the life histories of the dogfishes landed at Plymouth. Journal of the Marine Biological Association of the United Kingdom, 12: 577-643.
• Hammond, T.R. and Ellis, J.R. 2005. Bayesian assessment of North-east Atlantic spurdog using a stock production model, with prior for intrinsic population growth rate set by demographic methods. Journal of Northwest Atlantic Fishery Science, 35: 299-308. doi:2960/J.v35.m486.
• Hanchet, S. 1988. Reproductive biology of Squalus acanthias from the east coast, South Island, New Zealand. New Zealand Journal of Marine and Freshwater Research, 22: 537-5 doi: 1080/00288330.1988.9516324.
• He, J.X. and Stewart, D.J. 2001. Age and size at first reproduction of fishes: predictive models based on growth trajectories. Ecology, 82: 784-792.
• Henderson, C.A., Flannery, K. and Dunne, J. 2002. Growth and reproduction in spiny dogfish Squalus acanthias L. (Elasmobranchii: Squalidae), from the west coast of Ireland. Sarsia, 87: 350-3 doi: 1080/0036482021000155805.
• Henderson, C.A., McIlwain, J.L., Al-Oufi, H.S. and AmbuAli, A. 2006. Reproductive biology of the milk shark Rhizoprionodon acutus and the bigeye houndshark Iago omanenis in the coastal waters of Oman. Journal of Fish Biology, 68: 1662-1678. doi: 10.1111/j.1095862006.01011.x.
• Holden, M.J. and Raitt, D.F.S. 1974. Manual of fisheries science. Part: 2: methods of resource investigation and their application. FAO Fisheries Technical Report, 115: Rev. 1., Rome, 214 pp.
• Ismen, A. 2003. Age, growth, reproduction and food of common stingray (Dasyatis pastinaca L., 1758) in
• Iskenderun Bay, the eastern Mediterranean. Fisheries Research, 60: 169-1 doi: 1016/S01657836(02)00058-9.
• Ismen, A., Yigin, C.C., Altinagac, U. and Ayaz, A. 2009. Length-weight relationships for ten shark species from Saros Bay (North Aegean Sea). Journal of Applied Ichthyology, 25(1): 109doi: 1111/j.1439-0426.2009.01263.x.
• Jones, T.S. and Ugland, K.I. 2001. Reproduction of female spiny dogfish, Squalus acanthias, in the Oslofjord. Fishery Bulletin, 99: 685-690.
• Kabasakal, H. and Kabasakal, E. 2004. Sharks captured by commercial fishing vessels off the coast of Turkey in the northern Aegean Sea. Annales, Series Historia Naturalis, 14(2): 171-178.
• Ketchen, K.S. 1972. Size of maturity, fecundity, and embryonic growth of the spiny dogfish (Squalus acanthias) in British Columbia waters. Journal of the Fisheries Research Board of Canada, 39: 1717-1723. King, M. 1995. Fisheries Biology, Assessment and Management. Fishing New Books, London, 342 pp.
• Koob, T.J. and Callard, I.P. 1999. Reproductive endocrinology of female elasmobranchs: lessons from the little skate (Raja erinacea) and spiny dogfish (Squalus acanthias). Journal of Experimental Zoology, 284: 557-574. doi: 10.1002/(SICI)1097010X(19991001).
• Kousteni, V. and Megalogonou, P. 2011. Reproductive biology and embryonic development of Squalus blainvillei in the eastern Mediterranean Sea. Scientia Marina, 75(2): 237-2 doi: 103989/scimar.2011.75n2237.
• Last, P.R. and Stevens, J.D. 1994. Sharks and rays of Australia. CSIRO, Australia. 513 pp.
• Lucifora, L.O., Menni, R.C. and Escalante, A.H. 2002. Reproductive ecology and abundance of the sand tiger shark, Carcharias taurus, from the southwestern Atlantic. ICES Journal of Marine Science, 59: 5535 doi: 10.1006/jmsc.2002.1183.
• Lucifora, L.O., Menni, R.C. and Escalante, A.H. 2005. Reproduction, abundance and feeding habits of the broadnose sevengill shark Notorhynchus cepedianus in north Patagonia. Marine Ecology Progress Series, 289: 237-244.
• Marques da Silva, H. and Ross, M.R. 1993. Reproductive strategies of spiny dogfish, Squalus acanthias, in the NW Atlantic. ICES: C.M. G(51): 18 p.
• McFarlane, G.A. and King, J.R. 2003. Migration patterns of spiny dogfish (Squalus acanthias) in the North Pacific Ocean. Fishery Bulletin, 100: 358-367.
• Nammack, M.F., Musick, J.A. and Colvocoresses, T.A. 19 Life history of the spiny dogfish off the northeastern United States. Transactions of the American Fisheries Society, 114: 367-376. doi: 1577/1548-8659(1985)114<367:lhosdo>2.0. CO;2. Orlov, A.M., Kulish, E.F., Mukhametov, I.N. and Shubin, O.A. 2011. Age and Growth of Spiny Dogfish Squalus acanthias (Squalidae, Chondrichthyes) in Pacific Waters off the Kuril Islands. Journal of Ichthyology, 51(1): 42-55. doi: 1134/S0032945210061049.
• Pawson, M.G. and Ellis, J.R. 2005. Stock identity of elasmobranchs in the northeast Atlantic in relation to assessment and management. Journal of Northwest Atlantic Fisheries Science, 35: 173-193. doi: 2960/J.v35.m480.
• Saunders, M.F. and McFarlane, G.A. 1993. Age and length at maturity of the female spiny dogfish Squalus acanthias in the Strait of Georgia, British Columbia, Canada. Environmental Biology of Fishes, 38: 49-57. doi: 1007/BF00842903.
• Stenberg, C. 2005. Life history of the piked dogfish (Squalus acanthias L.) in Swedish waters. Journal of Northwest Atlantic Fishery Science, 35: 155-164. doi:2960/J.v35.m525.
• Tanaka, S., Shiobara, Y., Hioki, S., Abe, H., Nishi, G., Yano, K. and Suzuki, K. 1990. The Reproductive Biology of the Frilled Shark, Chlamydoselachus anguineus, from Suruga Bay, Japan. Japanese Journal of Ichthyology, 37(3): 273-290.
• Tribuzio, C.A., Kruse, G.H. and Fujioka, J.T. 2010. Age and growth of spiny dogfish (Squalus acanthias) in the Gulf of Alaska: analysis of alternative growth models. Fishery Bulletin, 108: 119–135.
• Wourms, J.P. 1977. Reproduction and development in chondrichthyan fishes. American Zoology, 17: 3794 doi: 10.1093/icb/17.2.379.
• Yigin, C.C. and Ismen, A. 2012. Age, growth and reproduction of the common stingray, Dasyatis pastinaca from the North Aegean Sea. Marine Biology Research, 8: 644-6 doi: 1080/17451000.2012.659667.
• Zar, J.H. 1999. Biostatistical Analysis, 4th edition, Upper Saddle River, NJ: Prentice Hall, New Jersey, 662 pp.