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Extremely low number of records off Turkish coast from 1950’s to date confirmed the rarity of Cetorhinus maximus in Turkish waters. A specific scientific monitoring program accompanied by zooplankton surveys should be implemented as soon as possible to figure out the seasonal movements of C. maximus in the mentioned region to answer the question whether the occurrence of basking sharks in Turkish waters exhibits a seasonality and site fidelity or not? © 2013, University of Primorska. All rights reserved. Source


One hundred and fifty specimens of Hexanchus griseus (Bonnaterre, 1788) were caught by commercial fishing vessels in the seas of Turkey, between 16 July 1967 and 4 February 2013. Regarding the number of captured specimens per marine areas, the highest number of captures was recorded in the Sea of Marmara (90 specimens; 60%), followed by the Aegean (41 specimens; 27.3%), Mediterranean (15 specimens; 10%) and Black (3 specimens; 2%) seas. A single stranded individual was also recorded in the Çanakkale Strait. Regarding the number of recorded specimens it is obvious that the Sixgill Shark Data Bank of Turkey holds a significant number of H. griseus specimens caught in the eastern Mediterranean Sea, both reported in historical and contemporary studies. The sex ratio of the examined specimens of H. griseus is 1:2.61 in favour of females. Analysis of the fishing gear used for 72 of 150 examined sixgill sharks indicates that the most common fishing gear used to catch H. griseus is purse-seine, followed by several types of bottom fishing gear. Total length of the recorded specimens ranged between 50 and > 650 cm TL for both sexes; however, catches were dominated by two size groups, 250-350 cm and 350-450 cm TL, respectively. © 2013, University of Primorska. All rights reserved. Source


Kabasakal H.,Ichthyological Research Society
Marine Biodiversity Records | Year: 2011

A female great white shark, Carcharodon carcharias, was caught by a tuna hand-liner in the Bosphorus Strait, in late March 1968. Its total length was estimated to be 551 cm and precaudal length 433 cm. Carcharodon carcharias now seems to be extinct from the Sea of Marmara due to the decline of tuna populations in the Marmaric waters. Copyright © Marine Biological Association of the United Kingdom 2011. Source


Kabasakal H.,Ichthyological Research Society
Mediterranean Marine Science | Year: 2010

During the last 58 years only 12 angular rough sharks have been recorded in Turkish waters. Rare captures of the species in the area indicate a need for immediate action to be taken for the conservation of O. centrina. To protect the habitat of O. centrina, strict regulations should be implemented regarding diving in the localities where angular rough sharks occur regularly. Protecting the habitat of the angular rough shark is an urgent need before subjecting O. centrina to 100% protection in the seas of Turkey. Source


Status of the bramble shark, Echinorhinus brucus (Bonnaterre,1788), in the seas of Turkey has always been a point of debate until early 2000’s. With the addition of 7 recent records from the seas of Turkey, which constitues the 22.5 percent of the historical and contemporary records of the bramble shark from entire Mediterranean Sea, 31 individuals of E. brucus have been recorded from the entire region, and the record no. 7 of the present study is probably the most recently captured bramble shark, to date. Since 5 of the 7 recent records of E. brucus have been reported from the Sea of Marmara, special attention of research should be focused to this small inland sea to figure out whether this species has a localized population in this region or not. © 2014 University of Primorska. All rights reserved. Source

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