Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı 2

Determınatıon of Tthe Stranded Cetacean Specıes ın the Sea of Marmara
This is the first study which is conducted periodically around sandy beaches of the Sea of Marmara. The aim of the study is investigation and determination of stranding Cetacean species by seasonal field surveys. In addition to this it is also targeted to create stranding networks to reach all the stranding individuals excluding field periods. Thus, it could be possible to reach all Cetaceans lost their lives and expose the reason of death for planning precautions to protect Cetaceans. It is also aimed examining the contents of their stomach to determine the nutritional status and diet.
This study was carried out between June 2012 and November 2013 seasonally. Throughout the study predetermined 492 km of shores were scanned and evaluated that twenty four denouncement, four information from newspapers and social web sites news and four with fieldwork about stranded Cetacean species.
From the stranded Cetaceans in the shores of the Sea of Marmara, twelve bottlenoses (Tursiops truncatus), ten common dolphins (Delphinus delphis), eight harbour porpoises (Phocoena phocoena), one striped dolphin (Stenella coeruleoalba), one Risso’s dolphin (Grampus griseus), a total of 32 dolphins were found.
Risso’s dolphin (Grampus griseus) stranded to the Sea of Marmara for the first time from the stranding dolphins. It was also observed that 2 harbour porpoises stranded to the South of the Marmara Sea’s shores for the first time. Apart from these, in January it was recorded a striped dolphin stranded to Silivri which is known as a rarely found species in the Sea of Marmara.
During the stomach content study, has been reached 13 stomachs of 32 animals and 6 of them determined to be empty. 19 stomachs of 32 animals hasn’t been researched because of their corruption. Stomach content studies made by stomach examples of 2 bottlenose dolphins and 5 common dolphins. From the bottlenose dolphins stomachs Trachurus sp. and Squalus blainvillei were found in the stomach contents. The shark species Squalus blainvillei, known as the longnose spurdog, was found in a bottlenose dolphins stomach for the first time.
During the examination of common dolphins stomach contents Trachurus sp. (Horse mackerel), Spicara simaris (Picarel), Sprattus sprattus (Sprat), Merlangius merlangus euxinus (Whiting), Lampanyctus crocodilus (Jewel lanternfish), Pomatomus saltatrix (bluefish), Anthias anthias (seaperch), Scomber scombrus (Mackerel) and Pagellus acarne (Seabream) were found. Seabream and Seaperch were not reported in stomach contents of common dolphin before.
To conclude, there is a need for further detailed continual investigations for the monitoring and protecting of Cetacean species in the Sea of Marmara. In addition to this to protect the Cetaceans and all other species and to provide prevention marine pollution and sustainable fisheries detailed studies should be done. As a result of all these suggestions; That have been seen the necessity of Cetacean action plan implement for the sustainable studies and to take the necessary measures in the Sea of Marmara.
As a result, there is a need for further detailed progressive investigations for the monitoring and protecting of Cetacean species in the Sea of Marmara. In addition, avoiding marine pollution and providing sustainable fisheries are necessary for the protection of the Cetaceans and their inhabiting marine ecosystem. As a result of all these suggestions; implementation of Cetacean Action Plan for the stranded cetaceans and special area of conservation of cetaceans (SACs) should be done.