Papers by servet dogdu
Journal of the Black Sea/Mediterranean Environment, 2017
This study is performed to classify fish species based on morphometric measurements between main ... more This study is performed to classify fish species based on morphometric measurements between main points (fins, head and mouth) on fish image. Three species of Triglidae Family (Aspitrigla cuculus, Chelidonichthys lastoviza and Chelidonichthys lucernus) which has very similar in appearance of shape, color and the fin type are used for the classification. In the first stage, dataset was collected using images of fish species, and then morphometric features were extracted from the fish images using 13 landmarks. Deep Belief Networks is used as a classifier by combining with 3-fold cross validation method. Consequently, 3 fish-species of Triglidae family are separated with a high accuracy rate of 97.61%.
Occurrence of the Red Sea goatfish Parupeneus forsskali (Fourmanoir & Guézé, 1976) (Perciformes: Mullidae) from Iskenderun Bay, Northeastern Mediterranean
Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=30
On 15 March 2015, a... more Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=30
On 15 March 2015, a single specimen of Parupeneus forsskali (Fourmanoir & Guézé, 1976) was captured by a trammel net at a depth of 30 m from Iskenderun Bay. The occurrence of the Red Sea goatfish P. forsskali was reported for the first time in the Iskenderun Bay and the first captured data for the Turkish marine waters.
Threatened brill species in marine waters of Turkey: Scopthalmus rhombus (Linnaeus, 1758) (Scopthalmidae
Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=29
Scopthalmus rhombus... more Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=29
Scopthalmus rhombus is rarely occurred and restricted to marine and estuarine sites in the eastern Marmara Sea and western Black Sea coast of Turkey. S. rhombus is occasionally caught in low numbers and continuously decreased in abundance due to overfishing and habitat degradations. This species should be considered to be threatened for Turkish marine waters. This species might also be recorded in the IUCN Red List of Threatened Species as Near Threatened (NT).
First record of the Indo-Pacific soldier bream Argyrops filamentosus (Valenciennes, 1830) from the Mediterranean Sea.
First record of greenback horse mackerel, Trachurus declivis (Jenyns, 1841) in the Mediterranean Sea
Microsatellite loci for Black Sea turbot Scophthalmus maeoticus
Link: http://nesciences.com/abstract_info.php?page=info&paperID=63
Several microsatellite loci w... more Link: http://nesciences.com/abstract_info.php?page=info&paperID=63
Several microsatellite loci were tried for Scophthalmus maeoticus by using microsatellite primers which have been developed and reported to date for turbot Scophthalmus maximus (Linnaeus, 1758) to understand if they are appropriate usage for S. maeoticus. We noticed the development and characterization of polymorphic microsatellite markers for S. maeoticus. Only five of these microsatellite loci were successfully amplified with new developed PCR conditions and used for routine analysis of stock identification of S. maeoticus.
Environmental DNA for Detection of Endangered Grouper Species (Epinephelus spp.)
Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=125
Marine ecosystems ... more Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=125
Marine ecosystems nestle species or populations known to be threatened due to human overexploitation. Reliable detection and monitoring of threatened organisms is crucial for data-driven conservation actions. Furthermore, misidentification of species represents a major problem. Here, we investigate the potential of using metabarcoding of environmental DNA (eDNA) obtained directly from seawater samples to detect endangered grouper species (Epinephelus spp.). Cytochrome c oxidase subunit I (COI) fragment of mtDNA was used to detect groupers species in the Mediterranean Coasts. We conducted eDNA sampling at sites by underwater diving across the range of the Grouper species habitats in Northeastern Mediterranean (Antalya-Kas Region and Iskenderun Bay). eDNA was isolated from 2 liter seawater samples which were vacuum-filtered onto 0.45-mm membrane filters. Filters were then folded inwards, placed in 2 ml tubes and stored at -20 oC until DNA extraction, which took place within 24 hours. DNA was extracted from the water sample filters using the DNeasy Blood and Tissue Kit (Qiagen, USA). Manufacturer’s protocols were used during all steps. PCR amplification of eDNA samples were done using selective primers of COI region of mitochondrial DNA, and next-generation DNA sequencing of PCR application was conducted. For the successfully obtained COI sequences, maximum matching rates were revealed as 80% for Epinephelus marginatus, 78,95% for Epinephelus aeneus, 73,48% for Epinephelus costae, 63,45% for Epinephelus caninus, 60,12% for Mycteroperca rubra and 57,12% for Hyporthodus haifensis. Despite the methodological challenges inherent in eDNA analysis, the results demonstrated that eDNA method may be proved to step towards a new beginning to detect and monitor endangered grouper species.
First record of the Indo-Pacific striped eel catfish, Plotosus lineatus (Thunberg, 1787) from Turkish marine waters
Three specimens of striped eel catfish, Plotosus lineatus (Thunberg, 1787) were caught by a spear... more Three specimens of striped eel catfish, Plotosus lineatus (Thunberg, 1787) were caught by a spear gun at depths of 20 m on 4 April 2016 from Iskenderun Bay (Çevlik harbour), North-eastern Mediterranean coast of Turkey. With the present study, P. lineatus is the first time reported from Turkish marine waters, in the Iskenderun Bay, the Northeastern Mediterranean and also this is the first Plotosid species recorded from Turkish Seas.
Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=51
2015. First record of the Indian Ocean twospot cardinalfi sh, Cheilodipterus novemstriatus (Actin... more 2015. First record of the Indian Ocean twospot cardinalfi sh, Cheilodipterus novemstriatus (Actinopterygii: Perciformes: Apogonidae), from Turkish marine waters. Acta Ichthyol. Piscat. 45 (3): 319-322.
Occurence of Red Sea Goatfish Parupeneus forsskali (Fourmanoir & Guézé, 1976) from Iskenderun Bay
Proceedings by servet dogdu
Distribution and Abundance Status of Gurnard Species in Turkish Marine Waters
Uploads
Papers by servet dogdu
On 15 March 2015, a single specimen of Parupeneus forsskali (Fourmanoir & Guézé, 1976) was captured by a trammel net at a depth of 30 m from Iskenderun Bay. The occurrence of the Red Sea goatfish P. forsskali was reported for the first time in the Iskenderun Bay and the first captured data for the Turkish marine waters.
Scopthalmus rhombus is rarely occurred and restricted to marine and estuarine sites in the eastern Marmara Sea and western Black Sea coast of Turkey. S. rhombus is occasionally caught in low numbers and continuously decreased in abundance due to overfishing and habitat degradations. This species should be considered to be threatened for Turkish marine waters. This species might also be recorded in the IUCN Red List of Threatened Species as Near Threatened (NT).
Several microsatellite loci were tried for Scophthalmus maeoticus by using microsatellite primers which have been developed and reported to date for turbot Scophthalmus maximus (Linnaeus, 1758) to understand if they are appropriate usage for S. maeoticus. We noticed the development and characterization of polymorphic microsatellite markers for S. maeoticus. Only five of these microsatellite loci were successfully amplified with new developed PCR conditions and used for routine analysis of stock identification of S. maeoticus.
Marine ecosystems nestle species or populations known to be threatened due to human overexploitation. Reliable detection and monitoring of threatened organisms is crucial for data-driven conservation actions. Furthermore, misidentification of species represents a major problem. Here, we investigate the potential of using metabarcoding of environmental DNA (eDNA) obtained directly from seawater samples to detect endangered grouper species (Epinephelus spp.). Cytochrome c oxidase subunit I (COI) fragment of mtDNA was used to detect groupers species in the Mediterranean Coasts. We conducted eDNA sampling at sites by underwater diving across the range of the Grouper species habitats in Northeastern Mediterranean (Antalya-Kas Region and Iskenderun Bay). eDNA was isolated from 2 liter seawater samples which were vacuum-filtered onto 0.45-mm membrane filters. Filters were then folded inwards, placed in 2 ml tubes and stored at -20 oC until DNA extraction, which took place within 24 hours. DNA was extracted from the water sample filters using the DNeasy Blood and Tissue Kit (Qiagen, USA). Manufacturer’s protocols were used during all steps. PCR amplification of eDNA samples were done using selective primers of COI region of mitochondrial DNA, and next-generation DNA sequencing of PCR application was conducted. For the successfully obtained COI sequences, maximum matching rates were revealed as 80% for Epinephelus marginatus, 78,95% for Epinephelus aeneus, 73,48% for Epinephelus costae, 63,45% for Epinephelus caninus, 60,12% for Mycteroperca rubra and 57,12% for Hyporthodus haifensis. Despite the methodological challenges inherent in eDNA analysis, the results demonstrated that eDNA method may be proved to step towards a new beginning to detect and monitor endangered grouper species.
Full text link: http://nesciences.com/abstract_info.php?page=info&paperID=51
Proceedings by servet dogdu