Common Dolphin, Delphinus delphis (Cetacean: Dolphinidae) Stranding off Sinop Peninsula in the Black Sea

Yıl 2018, Cilt: 28 Sayı: 2, 209 - 214, 29.06.2018

Hünkar Avni Duyar Sabri Bilgin

https://doi.org/10.29133/yyutbd.411834

Cited By: 2

Öz

The
present study summarizes information on the stranding common dolphin, Delphinus delphis, off the Sinop
peninsula and also describes information on the weight-length relationships of
the common dolphin in the center Black Sea, Turkey for the first time. During the research period, a total of 10 D. delphis were examined as stranding
off Sinop Peninsula. It was determined that a lot of water birds species (Great cormorant) were seen as died on
the sea coast during the dolphin survey. The death reasons of the common
dolphin were drowned after the catching the nets and it is also suspected that
death reason of common dolphins is water pollution. The length weight relationship
(WLRs) of D. delphis determined as
Log (W) = 2.2898 L - 2.6501, r²
= 0.9959 (n = 7). It is important that standing
levels of Cetaceans living in the Black Sea in terms of protection efforts. It
is also important to investigate the causes of death. Focusing on these topics
in subsequent studies will be important for the protection of endangered (Phocoena phocoena and Tursiops truncatus) and vulnerable (D. delphis) cetaceans in the Black Sea.

Anahtar Kelimeler

Cetaceans, Common dolphin, Delphinus delphis, Stranding, Black Sea

Karadeniz Sinop Yarımadasında Karaya Vuran Tırtak Türü (Delphinus delphis) Yunuslar

Öz

Bu çalışmada, Sinop yarımadası civarında karaya vuran
tırtak türü (Delphinus delphis) ve bu
türün boy-ağırlık ilişkisini orta Karadeniz’de ilk kez özetlemektedir. Çalışma
süresince 10 adet yunus bireyi karaya vurmuş olarak tespit edilmiş ve
incelenmiştir. Çalışma süresinde ölü yunusların yanında çok sayıda ölü su kuşu (Great cormorant) da tespit edilmiştir.
Karaya vuran yunusların ölüm nedeninin balıkçı ağlarına dolanıp boğularak
öldükleri düşünülmektedir. Ayrıca su kirliliğinin de ölümler üzerine etkili
olabileceğinden şüphelenilmiştir. İncelenen yunusların boy ağırlık ilişkisi Log
(W) = 2,2898 L – 2,6501, r²
= 0,9959 (n = 7) şeklinde hesaplanmıştır. Karadeniz’de Cetacea türlerinin
korunması önlemleri açısından karaya vuran miktarının ve ölüm sebeplerinin
bilinmesi önemlidir. Bu kapsamda tehlike altında (Phocoena phocoena ve Tursiops truncatus) ve hassas (D. delphis) kategorisindeki yunus
türleri üzerine daha fazla çalışma odaklanmalıdır.

Anahtar Kelimeler

Delphinus delphis, Cetacea, Tırtak, Karaya vurmak, Karadeniz

Kaynakça

• Anonymous, (2018). https://www.mmapl.ucsc.edu/basic-response/gender-id/cetaceans. (Accessed April 5, 2018).
• Birkun Jr., A. A. (2002). Interactions between cetaceans and fisheries in the Black Sea. In: G. Notarbartolo di Sciara (Ed.), Cetaceans of the Mediterranean and Black Seas: state of knowledge and conservation strategies. A report to the ACCOBAMS Secretariat, Monaco. Section 10, 11p.
• Birkun Jr., A.A. (2008). Delphinus delphis ssp. ponticus. The IUCN Red List of Threatened Species 2008: e.T133729A3875256.
• Gihr M., Pilleri, G. (1979). Interspecific body length-body weight ration and body weight-brain weight ratio in Cetacea. Investigations on Cetacea, 10: 245-253.
• Gol’din P.E. (2005). Body proportions of harbour porpoise Phocoena phocoena (Cetacea, Phocoenidae) in the Sea of Azov and the Black Sea. Vestnik zoologii, 39: 59 – 65.
• Kastelein R.A., van Battum R. (1990). The relationship between body weight and morphological measurements in Harbour porpoise (Phocoena phocoena) from the North Sea. Aquatic Mammals, 16: 48-52.
• Öztürk B. (1996). Whales and Dolphins, Introduction of Cetology. Anahtar Kitaplarý Yayinevi, Istanbul. 136p.(in Turkish).
• Öztürk B., Öztürk A.A., Dede A. (1999). Cetacean bycatch in the western coast of the Turkish Black Sea in 1993-1997. in: P.G.H. Evans, J. Cruz and J. A. Raga (Eds.), Proc. 13th Annual Conf. European Cetacean Society, Velencia, Spain. 134pp.
• Öztürk B., Aktan Y., Topaloğlu B., Keskin Ç., Öztürk A.A., Dede A., Türkozan O. (2003). Marine life of Turkey in the Aegean and Mediterranean Seas. Turkish Marin Research Foundation (TUDAV) Ofis press: Istanbul.
• Radu G., Nicolaev S., Anton E., Maximov V., Radu E. (2003). Preliminary data about the impact of fishing gears on the dolphins from the Black Sea Romanian waters. In: Workshop on demersal Resources in the Black Sea and Azov Sea (B. Öztürk ed), pp. 115- 129. Turkish Marin Research Foundation (TUDAV) Ofis press: Istanbul.