Turkish Marine Research Foundation TUDAV

İstanbul, Turkey

Turkish Marine Research Foundation TUDAV

İstanbul, Turkey
Time filter
Source Type

Fontaine M.C.,University of Notre Dame | Fontaine M.C.,University Paris - Sud | Fontaine M.C.,French National Center for Scientific Research | Fontaine M.C.,Agro ParisTech | And 27 more authors.
Molecular Ecology | Year: 2014

Despite no obvious barriers to gene flow in the marine realm, environmental variation and ecological specializations can lead to genetic differentiation in highly mobile predators. Here, we investigated the genetic structure of the harbour porpoise over the entire species distribution range in western Palearctic waters. Combined analyses of 10 microsatellite loci and a 5085 base-pair portion of the mitochondrial genome revealed the existence of three ecotypes, equally divergent at the mitochondrial genome, distributed in the Black Sea (BS), the European continental shelf waters, and a previously overlooked ecotype in the upwelling zones of Iberia and Mauritania. Historical demographic inferences using approximate Bayesian computation (ABC) suggest that these ecotypes diverged during the last glacial maximum (c. 23-19 kilo-years ago, kyrbp). ABC supports the hypothesis that the BS and upwelling ecotypes share a more recent common ancestor (c. 14 kyrbp) than either does with the European continental shelf ecotype (c. 28 kyrbp), suggesting they probably descended from the extinct populations that once inhabited the Mediterranean during the glacial and post-glacial period. We showed that the two Atlantic ecotypes established a narrow admixture zone in the Bay of Biscay during the last millennium, with highly asymmetric gene flow. This study highlights the impacts that climate change may have on the distribution and speciation process in pelagic predators and shows that allopatric divergence can occur in these highly mobile species and be a source of genetic diversity. © 2014 John Wiley & Sons Ltd.

Guven K.C.,Turkish Marine Research Foundation TUDAV | Coban B.,Bülent Ecevit University | Ozkirimli S.,Istanbul University | Erdugan H.,18 Mart University | Sezik E.,Gazi University
Fresenius Environmental Bulletin | Year: 2013

This paper describes isolation and indentification of HHCP (Galaxolide®) as pollutant in red alga Laurencia pyramidalis Bory de Saint-Vincent ex Kützing (Syn. Laurencia obtusa var. pyramidata Bory ex J. Agardh) collected from Igneada (Black Sea coast) by GC/MS analysis. It was previously found as a pollutant in Danube River which consequently contaminates the Black Sea. It was suggested that this is a contamination of alga because it was not found in the same species collected from Assos (Çanakkale). This is the first record of HHCP contamination in algae. © by PSP.

Guven K.C.,Turkish Marine Research Foundation TUDAV | Coban B.,Bülent Ecevit University
Fresenius Environmental Bulletin | Year: 2012

In this work, we are reporting on the oil pollution in sea water and sediments of the Turkish coast, as well as the oil input calculated from Bosphorus undercurrent water into the Black Sea, between 2004-2007. The highest oil levels were found at the western part stations in the surface water at Terkos station (4), and in the sediments at Zonguldak station (13, 14). We suggest that the high pollution level is probably due to the pollution from Danube River, intensive ship traffic for the stations 1-6, the illegal discharge of ballast water from returning tankers, and also high tanker traffic for the stations 10-20 at the western part of the Turkish Black Sea. On the other hand, high pollution at the eastern coast is correlated with inputs from the neighboring petroleum loading stations. The calculated input of oil from undercurrent of Bosphorus was (in tons): 10422.0 (2004), 5153.10 (2005), 9385.10 (2006), and 6162.50 (2007), respectively. The oil input from the undercurrent of the Bosphorus to the Black Sea includes sewage of Istanbul and cities of the Sea of Marmara but also the pollution from Mediterranean/Aegean Sea. © by PSP.

Guven K.C.,Turkish Marine Research Foundation TUDAV | Coban B.,Bülent Ecevit University | Erdugan H.,18 Mart University
Asian Journal of Chemistry | Year: 2014

In this paper, the exogenic and endogenic compounds in three red algae Gracilaria bursa-pastoris, Phyllophora crispa and Laurencia obtusa var. pyramidata were reported. Exogenic compounds detected are oil components and other pollutants such as, saturated and unsaturated aliphatic, cyclic and aromatic hydrocarbons, BHT, nonyl phenol and halogenated compounds as hexachloroethane and 4-chlorophenol. Endogenic compounds were fatty acids and its esters, eicosane, squalene, phytol. The algae can be used for monitoring of the sea pollution. © 2014, Chemical Publishing Co. All rights reserved.

Tonay A.M.,Istanbul University | Tonay A.M.,Turkish Marine Research Foundation TUDAV | Bilgin S.,Recep Tayyip Erdoğan University | Dede A.,Istanbul University | And 6 more authors.
Hystrix | Year: 2012

Three anomalously white harbour porpoises (Phocoena phocoena) were reported in Turkish Seas. One of them was bycaught on 19 June 2011 in bottom gill nets off the eastern coast of the Turkish Black Sea. The second one was observed four times in May and early June 2012 in the Istanbul Strait. The last one was stranded alive on 7 July 2012 in the Istanbul Strait. Records (published and unpublished) of anomalously white harbour porpoises in the world were reviewed. In total, 34 records were found from the world seas: the Black Sea, North Sea, Baltic Sea, North Atlantic Ocean and North Eastern Pacific Ocean. According to these records, three patterns of pigmentation were suggested. Figures S1 (video), S2, S3, S4, S5, S6, S7, S8 and S9 are available as supplemental material on the Journal web site. © 2013 Associazione Teriologica Italiana.

Dede A.,Istanbul University | Dede A.,Turkish Marine Research Foundation TUDAV | Tonay A.M.,Istanbul University | Tonay A.M.,Turkish Marine Research Foundation TUDAV
Journal of Environmental Protection and Ecology | Year: 2010

Cetacean sighting data were collected on a research cruise carried out in autumn season (27.10-02.11.2007) in the western Black Sea between Istanbul (Turkey) and Constanta (Romania) and vice versa. This research cruise was conducted with a 32-m research vessel R/V YUNUS-S in the international waters. Average speed of the vessel was 10 nautical miles/h. At each sighting of cetaceans, species, numbers of animals, location (coordinates), time, behaviour of animals were recorded. During the survey, totally 417 nm was covered and 33 h of effort was made. The aim of the preliminary study was understanding the size and distribution of dolphin population in the western Black Sea. During the study, totally 16 sightings (91 individuals) of three species; common dolphin (Delphinus delphis), bottlenose dolphin (Tursiops truncatus) and harbour porpoise (Phocoena phocoena) were recorded. Number of individuals and number of sightings are 61 common dolphins in eight, 29 bottlenose dolphin in seven, and a harbour porpoise in one observation. The overall encounter rate was 3.83 sightings/lOOnmiles. Common dolphin was the most often observed species (50%), followed by the bottlenose dolphin (44%), and harbour porpoise (6%).

Dede A.,Istanbul University | Dede A.,Turkish Marine Research Foundation TUDAV | Salman A.,Ege University | Tonay A.M.,Istanbul University | Tonay A.M.,Turkish Marine Research Foundation TUDAV
Journal of the Marine Biological Association of the United Kingdom | Year: 2015

Stomach contents of six striped dolphins taken as by-catch in the swordfish fishery in the eastern Mediterranean Sea off the Turkish coast were examined. In total, 29 taxa were identified to species or family and 1777 individual food items (1394 bony fishes, 289 cephalopods, 94 crustaceans) were counted. Diaphus spp. and Ceratoscopelus maderensis were the most remarkable ones, as they accounted for 70.45% of the total number of fishes. Onychoteuthis banksii, on the other hand, was the only cephalopod species found in all stomach content analyses and represented 38.06% of the total number of cephalopods. Bony fish species: Myctophum punctatum, Notoscopelus elongatus, Electrona risso, Sudis hyalina, Moridae sp., Phycidae sp., Sternoptychidae sp. and cephalopods: Pterygioteuthis giardi and Chtenopteryx sicula were reported the first time in the stomach contents of striped dolphin in the Mediterranean Sea. Copyright © Marine Biological Association of the United Kingdom 2015

Topcu E.N.,Istanbul University | Topcu E.N.,Turkish Marine Research Foundation TUDAV | Tonay A.M.,Istanbul University | Tonay A.M.,Turkish Marine Research Foundation TUDAV | And 6 more authors.
Marine Environmental Research | Year: 2013

Beach debris abundance was estimated from surveys on 10 beaches of the Turkish Western Black Sea Coast. Debris was collected from 20 m long transects during four different seasons; sorted and categorized by type, usage and origin. Litter density varied from 0.085 to 5.058 items m-2. Debris was mainly composed of unidentifiable small size (2-7 cm) plastic pieces and beverage-related litter such as bottles and bottle caps. About half of the labeled litter was of foreign origin, including 25 different countries, 23% of which are in the Black Sea region.The south-western Black Sea Coast seems to receive foreign litter from two main sources: land-based debris from the neighboring countries and seaborne debris due to international shipping. Standardized methodology and indicators need to be designated all over the Black Sea basin in order to quantify and qualify coastal litter pollution, monitor compliance with MARPOL and develop regionally effective mitigation measures. © 2012 Elsevier Ltd.

Cucknell A.-C.,Marine Conservation Research International | Frantzis A.,Pelagos Cetacean Research Institute | Boisseau O.,Marine Conservation Research International | Romagosa M.,Marine Conservation Research International | And 7 more authors.
Marine Biodiversity Records | Year: 2016

Results are presented from the first systematic visual and acoustic line-transect survey for harbour porpoises in the Thracian Sea, northern Aegean Sea. During the vessel survey, undertaken in summer 2013, porpoises were observed on nine occasions and detected acoustically 16 times, with a total of 21 distinct encounters recorded. Harbour porpoises were encountered in three discrete blocks: north of the Island of Thasos, Greece; south and west of the city of Alexandroupolis, Greece; and in Saros Bay, Turkey. Saros Bay exhibited the highest relative acoustic encounter rate of harbour porpoises, and porpoises were observed visually there on two occasions 14 days apart, in small groups, one of which included a mother-calf pair. A comprehensive review of stranding records is also presented. The three areas identified as harbour porpoise habitat in this study coincide with the highest number of recorded stranded animals. This paper is the first to report free-swimming harbour porpoises in the Aegean Sea since 1993, and the first time ever in Turkish Aegean waters. Now that the presence of harbour porpoises has been documented, international cooperation towards long term monitoring and management measures are urgently required in order to conserve this vulnerable population. © 2016 The Author(s).

Dede A.,Istanbul University | Dede A.,Turkish Marine Research Foundation TUDAV | Ozturk A.A.,Istanbul University | Ozturk A.A.,Turkish Marine Research Foundation TUDAV | And 6 more authors.
Journal of the Marine Biological Association of the United Kingdom | Year: 2014

The Istanbul Strait (Bosphorus) is a part of the Turkish Straits System, connecting the Aegean Sea and the Black Sea. There are three cetacean species in the Strait, namely the harbour porpoise (Phocoena phocoena), the common dolphin (Delphinus delphis), and the bottlenose dolphin (Tursiops truncatus). To monitor the presence of the cetaceans, a fixed stereo passive acoustic monitoring system (A-tag) was deployed in the middle of the Strait from July 2009 to September 2010. In total 26,814 click trains were detected. Presence, direction and inter-click intervals of phonating cetaceans were measured. Most click trains were detected during the night time. Diel presence pattern was prominent in March and April. In spring, the cetaceans were concentrated in one specific direction from the fixed monitoring system. In contrast, they were found in all directions for the rest of the year. Short range sonar (inter-click intervals (ICIs) less than 50 ms) was commonly detected in spring. During the rest of the year ICIs could reach up to 150 ms. All these findings suggest that they were feeding or socializing in spring and mostly travelling in the other seasons. It is well known that pelagic fish such as sprat and bluefish start their migration from the Aegean Sea to the Black Sea in spring. This study suggests that the cetaceans use the middle part of the Strait for feeding on the pelagic fish in spring when the fish migration has just started. © 2013 Marine Biological Association of the United Kingdom .

Loading Turkish Marine Research Foundation TUDAV collaborators
Loading Turkish Marine Research Foundation TUDAV collaborators