REMZİYE SERAP ERGENE, Cemil AYMAK, AŞKIN HASAN UÇAR, YASEMİN KAÇAR

2005 Üreme sezonunda Alata Kumsalı’na (Mersin) yuva yapan chelonia mydas ve caretta caretta populasyonlarının araştırılması

Bu çalışmada, Mersin ilinde bulunan ve I. Derece Doğal Sit Alanı olarak ilan edilmiş Alata Bahçe Kültürleri Araştırma Enstitüsü’nün sınırları içinde yer alan ve yaklaşık uzunluğu 3 km olan Alata Kumsalı’na 2005 üreme sezonunda yuva yapan Chelonia mydas ve Caretta caretta populasyonları incelenmiştir. 2005 üreme sezonunda Alata Kumsalı’ndaki 90 C. mydas çıkışından 20 tanesi (% 22,22) yuva ile sonuçlanırken, 62 C. caretta çıkışından ise 26 tanesi (% 41,94) yuva ile sonuçlanmıştır. Kumsalda C. mydas için yuva yoğunluğu 6,67 yuva/km çıkarken, C. caretta için yuva yoğunluğu 8,67 yuva/km olarak bulunmuştur. 14 C. mydas yuvasının ortalama kuluçka süresi 50,57 (min 48 - maks. 55) gün olarak saptanırken, 12 C. caretta yuvasının ortalama kuluçka süresi 46 (min. 37 - maks. 52) gün olarak hesaplanmıştır. Yumurta verisi açısından güvenilir olan C. mydas’a ait 18 normal yuvadaki yavru başarı oranı % 87,45 bulunurken, denize ulaşan yavru başarı oranı % 82,66 çıkmıştır. Yumurta sayısı açısından güvenilir olan C.caretta’ya ait 23 normal yuvadaki yavru başarı oranı % 79,34 çıkarken, denize ulaşan yavru başarı oranı % 66,48 bulunmuştur. Türkiye’deki üreme kumsallarından biri olan Alata Kumsalı 4 bölüme (A1, A2, A3 ve A4) ayrılarak incelenmiştir. 2005 üreme sezonunda Alata Kumsalı’nda her iki türe ait olan yuvalardaki toplam yumurta sayısı ve denize ulaşan yavru sayısı bölümlere ve denize olan uzaklığa göre değerlendirilirken SPSS 11,5 istatistik programından Oneway ANOVA testi kullanılmıştır. Türler karşılaştırılırken Independent T testi kullanılmıştır.

Anahtar Kelimeler:

Caretta caretta, yumurtadan çıkmak, yuva yapmak, populasyon, Türkiye, Chelonia mydas, Mersin

The Research on the population of Chelonia mydas and Caretta caretta nesting on Alata Beach (Mersin) in 2005 nesting season

In this study, the population of Chelonia mydas and Caretta caretta nesting on Alata Beach (Mersin) has been investigated for the 2005 nesting season. Alata Beach is 3 km long and is located inside the borders of Alata Horticultural Research Institute which is one of the 1st. degree natural sites. In this nesting season 20 (22.22 %) of 90 emergences of C. mydas and 26 (41.94 %) of 62 emergences of C. caretta resulted in nests. In Alata Beach, the density rank of nests for C. mydas was found as 6.67 nests/km and for C. caretta as 8.67 nests/km While the average incubation period of 14 C. mydas nests was estimated as 50.57 days (min. 48 - max. 55), the average incubation period of 12 C. caretta nests was estimated as 46 days (min. 37 - max. 52). The hatching success rate was determined as 87.45 % and the success rate of hatchlings reached the sea was determined as 82.66 % for 18 normal C. mydas nests which were reliable in terms of egg data. The hatching success rate was determined as 79.34 % and the success rate of hatchlings reached the sea was determined as 66.48 % for 23 normal C. caretta nests which were reliable in terms of egg data. Alata beach, one of the nesting areas in Turkiye, was examined by dividing into 4 sectors (A1, A2, A3 and A4). In 2005 nesting season, in Alata Beach the total number of eggs and the number of hatchlings reached the sea were examined according to the sectors and the distance of nests from the sea by using SPSS 11.5 statistical program, Oneway ANOVA. Independent T test was used while the two species were compared.

Keywords:

Caretta caretta, hatching, nesting, populations, Turkey, Chelonia mydas, Mersin,

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Aymak, C. 2004. Biological properties of marine turtles (Caretta caretta ve Chelonia mydas) on Alata beach, MSc Thesis. Mersin University, Mersin, 73 pp. (in Turkish).
Aymak, C., S. Ergene Gözükara, Y. Kaska. 2005. Reproductive ecology of Caretta caretta and Chelonia mydas during 2002 and 2003 nesting seasons in Alata, Mersin, Turkey. The Second Mediterranean Conference on Marine Turtles Book of Abstracts 10, 4-7 May 2005, Kemer, Antalya.
Baran, İ., M. Kasparek. 1989. Marine turtles Turkey, status survey 1988 and recommendation for conservation and management: Prepared by WWF, Hedielberg, 123 pp.
Broderick, A. C., F. Glen, B. J. Godley, G. C. Hays. 2002. Estimating the number of green and loggerhead turtles nesting annually in the Mediterranean, Oryx, 36 (3) 227-235.
Canbolat, A. F. 2004. A review of sea turtle nesting activity along the Mediterranean coast of Turkey, Biological Conservation, 116: 81-91.
Ergene, S., C. Aymak, Y. Kaska. 2006. Survey on the sea turtle (Caretta caretta ve Chelonia mydas) populations on the Alata beach (Mersin), (in Turkish). Proceedings of the First National Conference on Marine Turtles, 82-90, 4-5 Aralık 2003, Istanbul, WWF-Turkiye.
Groombridge, B. 1988. Marine turtle conservation in the Eastern Mediterranean field. survey in Northern Cyprus, find report, WWF Project 3852, Cambridge, UK.
Groombridge, B., 1990. Marine Turtle in the Mediterranean; Distribution, Population Status, Conservation. A Report to the Council of Europe, World Conservation Monitoring Centre, Cambridge, UK,
IUCN. 2010. IUCN Red List of Threatened Species Version 2010.1._____www.iucnredlist.org>. Downloaded on 14 May 2010.
Kasparek, M., B. J. Godley, A. C. Broderick. 2001. Nesting of the green turtle, Chelonia mydas, in the Mediterranean: A review of status and conservation needs, Zoology in the Middle East, 24: 45-74.
Lutz, P. L., J. A. Musick 1997. The biology of sea turtles. CRC Press, New York,432 pp.
Marquez, M. R. 1990. Sea turtles of the world. FAO species catalogue No: 125 Vol: 11.
Oruç, A., O. Türkozan, S. H. Durmuş. 2003. Following the marine turtles, The nesting beaches of marine turtles, (in Turkish). The Evaluation Report 2003, WWF – Turkey, Istanbul, Turkiye (ISBN: 975-92433-3-4).
Türkozan, O., E. Taşkavak, Ç. Ilgaz. 2003. A review of the biology of the loggerhead turtle, Caretta caretta, at five major nesting beaches on the south-western Mediterranean coast of Turkey, British Herpetological Journal, 13: 27-33.
Türkozan, O., Y. Kaska. 2010. Turkey. In Casale, P and Margaritoulis D. (Eds) Sea Turtles in the Mediterranean: distribution, threats and conservation priorities, 257-293 pp. IUCN/SSC Marine Turtle Specialist Group, Gland, Switzerland, 294 pp. (ISBN:978-2-8317- 1240-6).