Yazar "Katagan, T." seçeneğine göre listele

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    Alien species on the coasts of Turkey
    (Natl Centre Marine Research, 2005) Cinar, M. E.; Bilecenoglu, M.; Ozturk, B.; Katagan, T.; Aysel, V.
    The compilation of data on alien species reported from the Turkish coasts yielded a total of 263 species belonging to II systematic groups, of which Mollusca had the highest number of species (85 species), followed by Crustacea (51), fishes (43) and phytobenthos (39). The Black Sea is represented by a total of 20 alien species, the Sea of Marmara by 48 species, the Aegean Sea by 98 species and the Levantine Sea by 202 species. The majority of aliens found in the Black Sea and the Sea of Marmara were transported via shipping, whereas the Levantine coast is extensively subjected to Lessepsian migration. Benthic habitats (soft and hard substrata) comprise 76% of the total alien species and the pelagic environment is inhabited by thirty-nine species. Almost 50% of aliens collected from the Turkish coasts were found only at 0-10 m depth. Eight species occur at depths deeper than 100 m. The impacts of aliens on the benthic and pelagic ecosytems are presented.
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    An updated review of alien species on the coasts of Turkey
    (Natl Centre Marine Research, 2011) Cinar, M. E.; Bilecenoglu, M.; Ozturk, B.; Katagan, T.; Yokes, M. B.; Aysel, V.; Dagli, E.
    This 2010 review of alien species along the coasts of Turkey represents a total of 400 alien species belonging to 14 systematic groups. The present paper also reports the first findings of Vanderhorstia mertensi in the Aegean Sea (Gokova Bay), Chama adspersa in the Sea of Marmara and Mya arenaria in the Aegean Sea. A total of 124 new alien species was determined within the last 5 years. Mollusca had the highest number of species (105 species), followed by Polychaeta (75 species), Crustacea (64 species) and Pisces (58 species). The highest number of alien species (330 species) were encountered on the Levantine coast of Turkey, followed by the Aegean Sea (165 species), Sea of Marmara (69 species) and Black Sea (20 species). The Suez Canal (66% of the total number of alien species) is the main vector for species introductions to the coasts of Turkey, followed by the shipmediated transport (30%). The majority of species (306 species, 76% of total number of species) have become established in the area, while 59 species are classified as casual (15%), 23 species as questionable (6%) and 13 species as cryptogenic (3%). One new alien species was introduced to the coasts of Turkey every 4 weeks between 199:1 and 2010. The majority of aliens were found on soft substratum (198 species) in shallow waters (0-10 m) (319 species). Some species such as Caulerpa racemosa, Amphistegina lobifera, Amphisorus hemprichii, Rhopilema nomadica, Mnemiopsis leidyi, Hydroides spp., Ficopomatus enigmaticus, Charybdis longicollis, Rapana venosa, Asterias rubens, Siganus spp. and Lagocephalus sceleratus show a highly invasive character, and have great impacts both on the prevailing ecosystems and humans.
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    Decapod crustaceans on the Gokceada (Imbros) island continental shelf (north-eastern Aegean Sea)
    (Natl Centre Marine Research, 2006) Ates, A. S.; Katagan, T.; Kocatas, A.; Sezgin, M.
    The present composition of decapod crustaceans found at the sublittoral depths (5-104 m) off the coast of the island of Gokceada (north-eastern Aegean Sea) is presented. A total of 28 species (11 caridean shrimps, 1 thalassinid ghost crab, 7 anomurans and 9 brachyuran crabs) and 277 specimens were recorded. The caridean shrimp, Athanas nitescens had the highest abundance with a dominance value of 20.94% in samples. The dominant group is caridean, represented by a total of 11 species and an occurrence frequency of 39.29%.
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    Expanding distribution and occurence of the Indo-Pacific Stomatopod, Erugosquilla massavensis (Kossmann, 1880) on the Aegean coast of Turkey
    (Natl Centre Marine Research, 2008) Ozcan, T.; Ates, A. S.; Katagan, T.
    The indo-Pacific mantis shrimp, Erugosquilla massavensis was recently collected from Sigacik Bay, located on the Aegean coast of Turkey. It is the first record of the species along the Aegean coast of Turkey
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    First record of the red shrimp, Aristeus antennatus (Risso, 1816) (Decapoda: Aristeidae) from the Aegean Sea coast of Turkey
    (Natl Centre Marine Research, 2009) Ozcan, T.; Irmak, E.; Ates, A. S.; Katagan, T.
    A female specimen of the deep-water red shrimp, Aristeus antennatus (Risso, 1816) was caught at depths of between 550 m and 670 m during 2005 by trawling off the Marmaris coast. A. antennatus is a species known to inhabit only the Levantine Sea coast of Turkey. This paper is on the first record of the species along the southern Aegean Sea coast of Turkey
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    Likely effects of global climate change on the black SEA benthic ecosystem
    (2010) Sezgin, M.; Bat, L.; Katagan, T.; Ates, A.S.
    Occurrence and distribution of species in the Black sea are primarily determined by seawater temperature and salinity. The most recent predictions suggest that, by 2100, average air temperatures may be between 2 and 4°C higher than at present and seawater temperatures may be as much as 2°C higher than in 2000. The rise of the coastal zone seawater temperature may be higher than the open sea water average. It is expected that a warming of air and seawater temperatures will result in increased diversity of benthic marine life in the Black sea with adverse effects limited mainly to declines in abundance or loss of a small number of native species. Changes to a minority of biotopes might occur in the long-term. Depending on the temperature increase Mediterranisation of the Black sea fauna is in progress and occurs owing to immigration of new species. The aim of this article is discussing the global warming and the range of likely effects on marine benthic species. These effects may be related to changing water temperatures, changing water circulation or changing habitat. At present, to predict or detect the effects of climate change on marine benthic communities are quite difficult. But we can only provide educated guesses about potential changes and the consequences of those changes for the Black sea.
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    LIKELY EFFECTS OF GLOBAL CLIMATE CHANGE ON THE BLACK SEA BENTHIC ECOSYSTEM
    (Scibulcom Ltd, 2010) Sezgin, M.; Bat, L.; Katagan, T.; Ates, A. S.
    Occurrence and distribution of species in the Black sea are primarily determined by seawater temperature and salinity. The most recent predictions suggest that, by 2100, average air temperatures may be between 2 and 4 degrees C higher than at present and seawater temperatures may be as much as 2 degrees C higher than in 2000. The rise of the coastal zone seawater temperature may be higher than the open sea water average. It is expected that a warming of air and seawater temperatures will result in increased diversity of benthic marine life in the Black sea with adverse effects limited mainly to declines in abundance or loss of a small number of native species. Changes to a minority of biotopes might occur in the long-term. Depending on the temperature increase Mediterranisation of the Black sea fauna is in progress and occurs owing to immigration of new species. The aim of this article is discussing the global warming and the range of likely effects on marine benthic species. These effects may be related to changing water temperatures, changing water circulation or changing habitat. At present, to predict or detect the effects of climate change on marine benthic communities are quite difficult. But we can only provide educated guesses about potential changes and the consequences of those changes for the Black sea.
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    New records of Decapod Crustaceans (Decapoda: Pontoniinae and Inachidae) associated with sea anemones in Turkish waters
    (Natl Centre Marine Research, 2013) Duris, Z.; Ates, A. S.; Ozalp, H. B.; Katagan, T.
    Three anemone-associated decapod crustaceans, two shrimp species, Periclimenes amethysteus and P. aegylios (Caridea: Palaemonidae: Pontoniinae), and the crab Inachus phalangium (Brachyura: Inachidae), all collected from the Dardanelles, are reported for the first time from Turkish coasts. Another inachid crab, Macropodia czernjawskii, is also reported for the first time to occur in association with the sea anemone Anemonia viridis. Periclimenes scriptus was the fifth decapod species recorded associated with sea anemones within the framework of the present study, and while this species has already been reported from Turkish waters, this is the first time it is recorded from the Dardanelles (the Turkish Straits System).