Yazar "Önen M." seçeneğine göre listele
Listeleniyor 1 - 9 / 9
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Additions to the knowledge of alien molluscs of the aegean sea with three new records: Crepidula fornicata (Linnaeus, 1758), Anadara natalensis (Krauss, 1848) and Arcuatula senhousia (Benson in Cantor, 1842) [Crepidula fornicata (Linnaeus, 1758), Anadara natalensis (Krauss, 1848) ve Arcuatula senhousia (Benson in Cantor, 1842): Yeni Kayi{dotless}t Üç Tür ile Ege Denizi Yabanci{dotless} Mollusk Bilgilerine Katki{dotless}lar](Central Fisheries Research Inst, 2014) Dogan A.; Öztürk B.; Bakir B.B.; Önen M.Within the frame of surveys conducted in Izmir Bay (Aegean Sea) in November 2008, April 2009 and April-May 2012, three alien molluscs (Crepidula fornicata, Anadara natalensis and Arcuatula senhousia) have been recorded. Of the identified species, A. senhousia is new record for the Aegean Sea and the Turkish mollusc fauna, A. natalensis is new record for the Aegean Sea fauna, and the calyptraeid gastropod C. fornicata is new report for the Turkish mollusc fauna. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.Öğe Dacrydium hyalinum (Monterosato, 1875) and Musculus discors (Linnaeus, 1767): Two new Mytilidae (Bivalvia) species for the Turkish mollusc fauna(2007) Önen M.; Dogan A.The Bivalvia (Mollusca) fauna was studied from benthic samples collected from 101 stations from various biotopes in the Turkish Aegean Sea in 2000. Two species, namely Dacrydium hyalinum (Monterosato, 1875) and Musculus discors (Linnaeus, 1767), new to the Turkish Bivalvia fauna are reported. Notes on the morphological and ecological features of these species are provided. © Tübitak.Öğe Faunal assemblages of the mussel Mytilus galloprovincialis in and around Alsancak Harbour (Izmir Bay, eastern Mediterranean) with special emphasis on alien species(2008) Çinar M.E.; Katagan T.; Koçak F.; Öztürk B.; Ergen Z.; Kocatas A.; Önen M.; Kirkim F.; Bakir K.; Kurt G.; Dagli E.; Açik S.; Dogan A.; Özcan T.The faunal assemblages of the mussel Mytilus galloprovincialis were examined seasonally at four stations located in and around Alsancak Harbour between January and September 2004. A total of 155 species belonging to 14 systematic groups were found in the assemblages, of which Polychaeta had the highest number of species and individuals. The assemblages were mainly composed of species tolerant to pollution. The number of individuals (maximum 209,000 ind m- 2) and biomass (maximum 24,563 g m- 2) of the assemblage were generally higher at the stations located in the harbours, whereas the station not located in the harbours had the highest number of species and diversity index values (maximum 4.19). The mussel faunal assemblages differed mainly according to seasons and locations (ANOSIM test), but seasonal samples collected at each station constituted separate groups in the MDS plot, which are moderately correlated with a combination of environmental variables such as temperature, the concentrations of total nitrogen and phosphate phosphorus (?r = 0.46, BIOENV test). The environmental conditions at each station, the structure of substratum to which the mussel was attached and the biotic interactions among the associated faunal components seemed to be main factors influencing the faunal assemblages of the mussel in the area. The combined effect of season and location significantly changed the community parameters such as the number of species and individuals, and the values of diversity, evenness and biomass (two-way ANOVA test). The factors significantly influencing these community parameters were the algae biomass on mussels, total nitrogen and dissolved oxygen concentrations. The density of the mussel was negatively correlated with the diversity and evenness values of samples. The mussel community included ten alien species: Pseudonereis anomala, Polydora cornuta, Streblospio gynobranchiata, Hydroides dianthus, Hydroides elegans, Maera hamigera, Stenothoe gallensis, Paradella dianae, Anadara demiri and Celleporaria brunnea. These species comprised 31% of the total number of individuals found during this study. H. elegans was the most dominant species among aliens, reaching a maximum density of 110,700 ind m- 2 (spring, at station 3, 63% of the total population) in the area. The total abundance of aliens was positively correlated with that of natives, but the total biomass value of aliens was negatively correlated with that of natives. © 2007 Elsevier B.V. All rights reserved.Öğe Mollusc fauna of Iskenderun Bay with a checklist of the region [Iskenderun körfezi'nin Mollusca faunasi ve bölgenin tür listesi](2012) Bakir B.B.; Öztürk B.; Dogan A.; Önen M.This study was performed to determine the molluscs distributed in Iskenderun Bay (Levantine Sea). For this purpose, the material collected from the area between the years 2005 and 2009, within the framework of different projects, wa s investigated. The investigation of the material taken from various biotopes ranging at depth from 0 to 100 m resulted in identification of 287 mollusc species and 27542 specimens belonging to them. Among the encountered species, Vitreolina cf. perminima (Jeffreys, 1883) is new record for the Turkish molluscan fauna and 18 species are being new records for the Turkish Levantine coast. A checklist of Iskenderun mollusc fauna is given based on the present study and the studies carried out beforehand, and a total of 424 moluscan species are known to be distributed in Iskenderun Bay. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey in cooperation with Japan International Cooperation Agency (JICA), Japan.Öğe A new record of the invasive Red Sea mussel Brachidontes pharaonis (Fischer P., 1870) (Bivalvia: Mytilidae) from the Turkish coasts(Regional Euro-Asian Biological Invasions Centre, 2007) Dogan A.; Önen M.; Öztürk B.A specimen of the invasive mytilid mussel Brachidontes pharaonis (Fischer P., 1870) was collected on 18 April 2007 in Karaburun Peninsula, İzmir. This record represents the northernmost occurrence of the species along the Aegean coast of Turkey. Information on the distribution of the species along the Mediterranean coast of Turkey is provided. © 2007 The Author(s). Journal compilation.Öğe On the occurrence of Rhomboidella prideaux (Leach, 1815) (Mollusca: Bivalvia: Mytilidae) in the eastern Mediterranean(2006) Öztürk B.; Poutiers J.-M.; Önen M.; Dogan A.In a study performed in 2000 on the benthic fauna inhabiting the Turkish coasts of the Aegean Sea, a small less known Mytilidae species, Rhomboidella prideaux (Leach, 1815), which has not been reported from the eastern Mediterranean so far, was found. In the present study, the taxonomic, ecological and distributional aspects of this species, based on the material collected from the Aegean Sea and the eastern coast of Sicily, are provided. © CMS, Inc., 2006.Öğe Polyplacophora (mollusca) from the aegean coast of Turkey(2000) Öztürk B.; Ergen Z.; Önen M.This study has been conducted in order to determine the Polyplacophoran species occurring along the Aegean coasts of Turkey. As a result of collecting carried out in different habitats at 21 selected locations, 11 species were identified: Lepidopleurus cajetanus, L. scabridus, Ischnochiton rissoi, Callochiton septemvalvis euplaeae, Lepidochitona cinerea, L. corrugata, L. monterosatoi, Chiton corallinus, Ch. olivaceus, Acanthochitona crinita, and A. fascicularis. Of these species, Lepidopleurus scabridus is reported for the first time from Turkey, and Chiton corallinus is new for the Aegean fauna of Turkey. © Max Kasparek Verlag, Heidelberg.Öğe Ptenoglossa species (Mollusca: Gastropoda) distributed along the Turkish coast of the Aegean Sea(2008) Öztürk B.; Dogan A.; Bitlis B.; Önen M.This study was performed to determine Ptenoglossa species (Mollusca. Gastropoda) distributed along the Turkish coastline of the Aegean Sea. The examination of samples, taken between 1995 and 2005 from various biotopes and depths up to 300 m, yielded 249 specimens and 130 shells, belonging to 33 ptenoglossate species, of which Monophorus thiriotae Bouchet 1984, Similiphora similior (Bouchet and Guillemot 1978), Cerithiopsis diadema Monterosato 1874, Cerithiopsis jeffreysi Watson 1885, Krachia tiara (Monterosato 1874), Punctiscala cerigothana (Sturani 1896). Melanella boscii (Payraudeau 1826), and Nanobalcis nana (Monterosato 1878) were unrecorded from the Turkish coasts. Furthermore, M. thiriotae and K. tiara are new reports for the eastern Mediterranean Sea and the Aegean Sea fauna, respectively. This study also elucidates ecological characteristics of the species found and their distribution along the Turkish coasts. The photographs of newly reported species for the Turkish mollusc fauna are also given. © Tübitak.Öğe Seasonal dynamics of soft bottom zoobenthic communities in polluted and unpolluted areas of Izmir Bay (Aegean Sea)(E. Schweizerbart'sche Verlagsbuchhandlung, 2005) Dogan A.; Çinar M.E.; Önen M.; Ergen Z.; Katagan T.The polluted and unpolluted parts of Izmir Bay (Aegean Sea) were sampled seasonally in 1995 and 1996 in order to delineate effects of pollution on the spatial-temporal distributions of soft bottom benthic animals. A total of 298 species, represented by 6014 individuals, belonging to 10 major groups were determined, of which Polychaetes accounted for almost 51% of the total number of species (153 species) and 82% of the total number of individuals (4942 specimens). Crustaceans and molluscs were next dominant after the Polychaeta. By utilising the result of the cluster analysis, four main species assemblages were recognised in the area, each containing different dominant species. The heavily polluted inner bay, which was mainly dominated by the opportunistic polychaetes, Capitella capitata, Polydora spp. and Ophiodromus pallidus, reached azoic conditions in summer and autumn. As the results of the present study compare with those of previous studies held in the bay, it can be concluded that pollution in the bay tends to increase and adversely affects distributions of zoobenthic animals particularly in the inner part of Izmir Bay.
