Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea

DEMİRHAN, SEFA AYHAN; BAŞUSTA, NURİ; SEYHAN, KADİR

Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea

Sefa Ayhan DEMİRHAN, (Mustafa Kemal Üniversitesi, Su Ürünleri Fakültesi, Hatay, Türkiye)

Kadir SEYHAN, (Mustafa Kemal Üniversitesi, Su Ürünleri Fakültesi, Hatay, Türkiye)

Nuri BAŞUSTA (Fırat Üniversitesi, Su Ürünleri Fakültesi, Elazığ, Türkiye)

Ekoloji

1 1

Yıl: 2007 Cilt: 16 Sayı: 62 Sayfa Aralığı: 1 - 8 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022

Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea

Öz:

Bu çalışmada mahmuzlu camgöz (Squalus acanthias) ve vatoz (Raja clavata) türlerinin besin kompozisyonu ve aralarındaki besinsel rekabet araştırılmıştır. Bölgede, mahmuzlu camgöz ve vatozun besininin genel olarak kabuklulardan ve balıklardan oluştuğu tespit edilmiştir. Mahmuzlu camgözün beslenme stratejisinde ana kriter besinin bulunabilirliğidir. Kış mevsiminde ortamda yoğun olarak bulunan hamsi, mahmuzlu camgözün bu dönemdeki ana besinidir. Bu durum, mahmuzlu camgözün besin kompozisyonunu ve diyet genişliğini etkilediği gibi, dolayı olarak vatozun besin komposisyonu ile olan diyet benzerliği ve rekabetini de etkilemektedir. Çalışmada bu iki türün besin benzerliği indeksi %38 olarak bulunmuştur. Ayrıca vatozun besin kompozisyonu üzerinde mahmuzlu camgözün besin örtüşme değeri 1,38 olarak bulunmuştur. Bunun yanında daha dar bir diyete sahip olan mahmuzlu camgözün besin kompozisyonu üzerinde vatozun besin örtüşme değeri 0,36 olarak bulunmuþtur. Sonuç olarak, R. clavata kış mevsiminde hamsi ve mezgit ile, yılın kalan döneminde yengeç, kayabalığı türleri, diğer demersal balık türleri ve mezgitle beslenirken, mahmuzlu camgöz beslenme konusunda seçici davranmamakta ve ortamda bulunan her besin maddesini tüketebilmektedir.

Anahtar Kelime: Raja clavata beslenme tercihleri gıda bileşimi Squalus acanthias biyolojik rekabet benzerlik indeksi Karadeniz av mevsimsel değişimler

Konular: Çevre Mühendisliği

Güneydoğu Karadeniz' de Mahmuzlu Camgöz (Squalus acanthias) ile vatoz (Raja clavata) arasındaki besinsel rekabet

Öz:

The food composition and dietary overlap between the spiny dogfish (Squalus acanthias) and thornback ray (Raja clavata) were studied in the Eastern Black Sea. It was found that the food of S. acanthias and R. clavata in the area studied consisted of mainly fish and crustaceans. The availability of prey was found to be the main criterion in the spiny dogfish feeding strategy. In winter, anchovy were the dominant prey for S. acanthias. This reflects that there is a high availability of these prey in the region. The availability of prey items affected the diet composition, the values of diet breadth, the prey similarity and the dietary overlap of the thornback ray and spiny dogfish. The study has shown that the prey similarity index of these species was 38%. The diet of R. clavata was significantly overlapped by the diet of S. acanthias (1.38). However, S. acanthias was observed to have a more unique diet and was insignificantly overlapped by R. clavata (0.36). The overall results indicate that the spiny dogfish is an indiscriminate predator preying upon those species that are most abundant and available in the area and season, and that R. clavata also feed mainly on anchovy and whiting in the winter but shift to crab and Gobius sp., a demersal species common in the area, together with whiting for the rest of the year.

Anahtar Kelime: similarity index Black Sea prey seasonal variation Raja clavata feeding preferences food composition Squalus acanthias biological competition

Konular: Çevre Mühendisliği

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

Aasen O (1961) Pigghaundersokelsene. Fiskets Gang 47, 2, 36-44.
Beamish RJ, Thomson BL, McFarlane GA (1992) Spiny dogfish predation on Chinook and Coho salmon and the potential effects on hatchery-produced salmon. Trans. Am. Fish. Soc. 121, 4, 444-455.
Beretovsky EG (1989) Feeding habits of Raja radiata and Raja fyllae in the Barents and Norwegian Seas. Voprosy Ikhtiologii 29, 6, 994-1002 (in Russian).
Bonham K (1984) Food of the dogfish, Squalus acanthias. Wash. Dept. Fish. Wildl. Serv. Fish Res. Pap. 1, 25-36.
Brewer PG, Murray JW (1973) Carbon, nitrogen and phosphorus in the Black Sea. Deep Sea Research. 20, 803-818.
Ciloglu E, Sahin C, Gozler AM, Verep B (2002) Vertical distribution of Whiting (Merlangius merlangus euxinus, Nordmann, 1840). EgeUniversity, Journal of Fisheries & Aquatic Sciences 19, 3-4, 303-309 (in Turkish).
Connell JH (1983) On the prevalence and relative import ance of interspecific competition: evidence from field experiments. American Naturalist 122, 661-696.
Cortes E (1998) Methods of studying fish feeding: reply. Can. J. Fish. Aquat. Sci. 55, 2708.
Cunha P Calvário J, Marques JC, Ré P (1986) Estudo comparativo dos regimes alimentares de Raja, brachyura Lafont, 1873, Raja clavata Linné, 1758, Raja montagui Fowler, 1910 e Raja naevus Müller and Henlen, 1841 (Pisces: Rajidae) da costa Portuguesa. Arquivos do Museu Bocage Série A III, 8, 137-154.
Demirhan SA (2004) Bio-ecological Characteristics of Spiny Dogfish (Squalus acanthias L. 1758) Southeastern Black Sea. PhD Thesis, Karadeniz Technical University, Trabzon.
Demirhan SA, Engin S, Seyhan K, Akamca E (2005) Some Biological Aspects of Thornback Ray (Raja clavata, L., 1758) in the Southeastern Black Sea. Turkish Journal of Fisheries and Aquatic Sciences 5, 75-83.
Ebert DA, Cowley PD, Compagno LJV (1991) A preliminary investigation of the feeding ecology of skates (Batoidea: Rajidae) off the west coast of Southern Africa. S. Afr. J. Mar. Sci. 10, 71-81.
Ellis JR, Pawson MG, Shackley SE (1996) The comparative feeding ecology of six species of shark and four species of ray (Elasmobranchii) in the North-East Atlantic. J. Mar. Biol. Assoc. U.K. 76, 89-106.
Erdem Y, Ozdemir S, Sumer C (2001) A study of stomach contents of thornback ray (Raja clavata L.). In: Akyurt I, Basusta N (eds.), Proceedings of XI. National Symposium on Fisherres and Aquaculture, 1, 04-06 September 2001, Hatay, 351-359.
Erkoyuncu I, Ozdamar E (1989) Estimation of the age, size and sex composition and growth parameters of anchovy, Engraulis encrasicholus (L.) in the Black Sea. Fish. Res. 7, 241-247.
Genc Y (2002) Some Bio-ecological Characteristics of Mullus barbatus ponticus, Ess. 1927 in the Eastern Black Sea. PhD Thesis, Karadeniz Technical University, Trabzon.
Gokce MA, Basusta N, Tasbozan O, Akamca E (2005) Stomach content analysis in fishes. In: Karatas M (eds), Research Techniques in Fish Biology, Nobel Press, Ýstanbul, 357-376.
Hansson S (1998) Methods of studying fish feeding: a comment. Can. J. Fish. Aquat. Sci. 55, 2706-2707.
Hickley P North R, Muchiri SM, Harper DM (1994) The diet of largemouth bass, Micropterus salmoides, in Lake Naivasha, Kenya. J. of Fish Biol. 44, 607-619.
Holden MJ (1966) The food of the spurdog, Squalus acanthias L. J. Cons. Int. Explor. Mer. 30, 255-266.
Holt RD (2002) Food webs in space: on the interplay of dynamic instability and spatial processes. Ecological Research 17, 261-273.
Hureau JC (1970) Biologie comparée de quelques poissons antarctiques (Nototheniidae). Bull Inst. Océanogr. Monaco 68(1391), 1-244.
Hyslop EJ (1980) Stomach contents analysis - a review of methods and their application. J. Fish Biol. 17, 411-429.
Krebs CJ (1989) Ecological Methodology. Harper and Row Publishers, New York.
MacPherson E (1981) Resource partitioning in a Mediterranean demersal fish community. Mar. Ecol.Prog. Ser. 4, 183-193.
Mater S, Kaya M, Bilecenoglu M (2005) Turkey Marine Fishes-1, Cartilaginous Fishes(Chondrichthyes), Ege University Publication, Izmir.
Morato T, Solà E, Grós MP Menezes G (2003) Diets of thornback ray (Raja clavata) and tope shark (Galeorhinus galeus) in the bottom long line fishery of the Azores, Northeastern Atlantic. Fish Bull. 101,590-602.
Morisita M (1959) Measuring of interspecific association and similarity between communities. Mem. Fac. Sci. Kyushu Univ. Ser. Env. Biol. 3, 65-80.
Quiniou L, Andriamirado GR (1979) Variations du régime alimentaire de trois espèces de raies de la baie de Douarnenez (Raja montagui Fowler, 1919; Raja brachyura Lafont, 1873; Raja clavata L., 1758). Cybium 7, 27-39.
Sale PF, Williams DMcB (1982) Community structure of coral reef fishes: are the patterns more than those expected by chance? American Naturalist 120, 121-127.
Schoener TW (1974) Resources partitioning in ecological communities. Science 185, 27-39.
Siegel V (2000) Krill (Euphausiacea) life history and aspects of popilation dynamics. Can. J. fish Aquat. Sci. 57, 3, 130-150.
Smale MJ, Cowley PD (1992) The feeding ecology of skates (Batoidea: Rajidae) off the Cape south coast, South Africa. S. Afr. J. Mar. Sci. 12, 823-834.
Wallace H, Ramsey JS (1983) Reliability in measuring diet overlap. Can. J. Fish. Aquat. Sci. 40, 347-351.

APA	DEMİRHAN S, SEYHAN K, BAŞUSTA N (2007). Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. , 1 - 8.
Chicago	DEMİRHAN SEFA AYHAN,SEYHAN KADİR,BAŞUSTA NURİ Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. (2007): 1 - 8.
MLA	DEMİRHAN SEFA AYHAN,SEYHAN KADİR,BAŞUSTA NURİ Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. , 2007, ss.1 - 8.
AMA	DEMİRHAN S,SEYHAN K,BAŞUSTA N Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. . 2007; 1 - 8.
Vancouver	DEMİRHAN S,SEYHAN K,BAŞUSTA N Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. . 2007; 1 - 8.
IEEE	DEMİRHAN S,SEYHAN K,BAŞUSTA N "Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea." , ss.1 - 8, 2007.
ISNAD	DEMİRHAN, SEFA AYHAN vd. "Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea". (2007), 1-8.

APA	DEMİRHAN S, SEYHAN K, BAŞUSTA N (2007). Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. Ekoloji, 16(62), 1 - 8.
Chicago	DEMİRHAN SEFA AYHAN,SEYHAN KADİR,BAŞUSTA NURİ Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. Ekoloji 16, no.62 (2007): 1 - 8.
MLA	DEMİRHAN SEFA AYHAN,SEYHAN KADİR,BAŞUSTA NURİ Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. Ekoloji, vol.16, no.62, 2007, ss.1 - 8.
AMA	DEMİRHAN S,SEYHAN K,BAŞUSTA N Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. Ekoloji. 2007; 16(62): 1 - 8.
Vancouver	DEMİRHAN S,SEYHAN K,BAŞUSTA N Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea. Ekoloji. 2007; 16(62): 1 - 8.
IEEE	DEMİRHAN S,SEYHAN K,BAŞUSTA N "Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea." Ekoloji, 16, ss.1 - 8, 2007.
ISNAD	DEMİRHAN, SEFA AYHAN vd. "Dietary overlap in spiny dogfish (Squalus acanthias) and thornback Ray (Raja clavata) in the Southeastern Black Sea". Ekoloji 16/62 (2007), 1-8.