Papers by Hasan Huseyin Atar
Towards to Marine Informatics Network: A Case Study from Turkish Black Sea Coast within Upgrade Black Sea Scene Project
DNA barcoding commercially important fish species of Turkey
Molecular Ecology Resources, 2013
DNA barcoding was used in the identification of 89 commercially important freshwater and marine f... more DNA barcoding was used in the identification of 89 commercially important freshwater and marine fish species found in Turkish ichthyofauna. A total of 1765 DNA barcodes using a 654-bp-long fragment of the mitochondrial cytochrome c oxidase subunit I gene were generated for 89 commercially important freshwater and marine fish species found in Turkish ichthyofauna. These species belong to 70 genera, 40 families and 19 orders from class Actinopterygii, and all were associated with a distinct DNA barcode. Nine and 12 of the COI barcode clusters represent the first species records submitted to the BOLD and GenBank databases, respectively. All COI barcodes (except sequences of first species records) were matched with reference sequences of expected species, according to morphological identification. Average nucleotide frequencies of the data set were calculated as T = 29.7%, C = 28.2%, A = 23.6% and G = 18.6%. Average pairwise genetic distance among individuals were estimated as 0.32%, 9.62%, 17,90% and 22.40% for conspecific, congeneric, confamilial and within order, respectively. Kimura 2-parameter genetic distance values were found to increase with taxonomic level. For most of the species analysed in our data set, there is a barcoding gap, and an overlap in the barcoding gap exists for only two genera. Neighbour-joining trees were drawn based on DNA barcodes and all the specimens clustered in agreement with their taxonomic classification at species level. Results of this study supported DNA barcoding as an efficient molecular tool for a better monitoring, conservation and management of fisheries.
Biotechnology & Biotechnological Equipment, 2009
The sex reversion technique in fish is widespread in many countries. The development of these tec... more The sex reversion technique in fish is widespread in many countries. The development of these techniques is desirable because rainbow trout males reach their gonad maturity earlier compared to the females. A feeding trial was conducted to examine the supplemental effects of three hormones-17α-Methyltestosteron, 11β-hydroxyandrostenedione, 17α-Ethynyltestosterone on sex reversal and growth performance of rainbow trout. Control groups were fed with commercial diets for rainbow trout without hormones. These sex reversed functional males were reared for brood stock until they attained sexual maturity. Thereafter, normal rainbow trout eggs were fertilized with the sperms taken from sex reversed males for producing all-female populations. Also sex reversal ratio and growth performance were determined in hormone-treated groups. Examination of the results showed that 17α-Methyltestosterone was the most effective hormone treatment. The highest sex reversal ratio with 86.67±6.67% was observed in group treated with 3 mg/kg 17α-Methyltestosterone for 60 days. 11βhydroxyandrostenedione and 17α-Ethynyltestosterone released lower rates and produced quite equal results. Also highest intersex ratio of 46.67±6.67% was recorded in group treated with 30 mg/kg 17α-Ethynyltestosterone for 40 days but the rate was below 20% nearly in all other groups. Even though 17α-Ethynyltestosterone seemed the best, the individuals with unaltered sex were observed in range of 33.33±6.67% in group fed with 3 mg/kg 17α-Methyltestosterone for 30 days. It is very likely that the phenomenon is due to the short feeding period.
Determination of bycatch and discard catch rates on trawl fishing in Mersin-Anamur fishing ground
International journal of food, agriculture and …, 2010
This study was carried out at Anamur district of Mersin province using trawl net to determine mar... more This study was carried out at Anamur district of Mersin province using trawl net to determine marketable and discarded part of the catch of species. Catch samples were taken during September 2004 and April 2005 at fortnight intervals. Totally 923.17 kg species were caught during the ...
Seafood consumption and health
Türk Si̇lahlı Kuvvetleri̇, Koruyucu Heki̇mli̇k …, 2009
This paper discusses the relationship between a healthy life and seafood consumption. Fish and se... more This paper discusses the relationship between a healthy life and seafood consumption. Fish and seafood have been promoted as healthy eating options by health organizations in many countries all over the world. Seafoods are rich in important fatty acids, proteins, vitamins ...
DNA barcoding commercially important fish species of Turkey
Molecular ecology resources, 2013
DNA barcoding was used in the identification of 89 commercially important freshwater and marine f... more DNA barcoding was used in the identification of 89 commercially important freshwater and marine fish species found in Turkish ichthyofauna. A total of 1765 DNA barcodes using a 654-bp-long fragment of the mitochondrial cytochrome c oxidase subunit I gene were generated for 89 commercially important freshwater and marine fish species found in Turkish ichthyofauna. These species belong to 70 genera, 40 families and 19 orders from class Actinopterygii, and all were associated with a distinct DNA barcode. Nine and 12 of the COI barcode clusters represent the first species records submitted to the BOLD and GenBank databases, respectively. All COI barcodes (except sequences of first species records) were matched with reference sequences of expected species, according to morphological identification. Average nucleotide frequencies of the data set were calculated as T = 29.7%, C = 28.2%, A = 23.6% and G = 18.6%. Average pairwise genetic distance among individuals were estimated as 0.32%, 9....
DNA barcoding commercially important aquatic invertebrates of Turkey
Mitochondrial DNA, 2013
DNA barcoding was used in order to identify aquatic invertebrates sampled from fisheries bycatch ... more DNA barcoding was used in order to identify aquatic invertebrates sampled from fisheries bycatch and discards. A total of 440 unique cytochrome c oxidase sub unit I (COI) barcodes were generated for 22 species from three important phyla (Arthropoda, Cnidaria, and Mollusca). All the species were sequenced and submitted to GenBank and Barcode of Life Database (BOLD) databases using 654 bp-long fragment of mitochondrial COI gene. Two of them (Pontastacus leptodactylus and Rapana bezoar) were first records of the species for the BOLD database and six of them (Carcinus aestuarii, Loligo vulgaris, Melicertus kerathurus, Nephrops norvegicus, Scyllarides latus, and Scyllarus arctus) were first standard (>648 bp) COI barcode records for the GenBank database. COI barcodes were analyzed for nucleotide composition, nucleotide pair frequencies, and Kimura's two-parameter genetic distance. Mean genetic distance among species was found increasing at higher taxonomic levels. Neighbor-joining...
Journal of Biotechnology, 2008
12S rRNA Cytochrome b Cytochrome oxidase II Molecular phylogeny mtDNA Mullidae Mullus barbatus po... more 12S rRNA Cytochrome b Cytochrome oxidase II Molecular phylogeny mtDNA Mullidae Mullus barbatus ponticus a b s t r a c t DNA sequence comparisons of three mitochondrial DNA genes were used to reveal phylogenetic relationships among four species and a sub-species of Mullidae family. This is the first report using mitochondrial DNA sequence data to infer intraspecific relationship among different populations of Mullus barbatus and Mullus surmuletus; phylogenetic relationships between M. barbatus and its sub-species; M. barbatus ponticus. Cytochrome b, 12S ribosomal RNA, and cytochrome oxidase II regions of 242 individuals belonging to species M. barbatus, M. surmuletus, Upeneus moluccensis, Upeneus pori and sub-species M. barbatus ponticus were sequenced and phylogenetic trees were constructed using four different algorithms. The phylogenetic trees constructed support the existing taxonomical data of two mullid genera (Mullus, Upeneus). Molecular data shows no significant difference between same species of different geographical populations. The results suggest that the molecular difference is not large enough between M. barbatus and M. barbatus ponticus to consider them as sub-species.
Status of aquatic plant tissue culture in Turkey
Current Opinion in …, Jan 1, 2011
Biochemical Systematics and Ecology, 2011
Nucleotide divergence in cytochrome c oxidase subunit I (COI) gene of mitochondrial DNA was analy... more Nucleotide divergence in cytochrome c oxidase subunit I (COI) gene of mitochondrial DNA was analyzed to determine interpopulational variation of common octopus (Octopus vulgaris) species sampled along eastern Mediterranean. Nucleotide composition and nucleotide pair frequency analyses of 440 individuals representing 11 populations were investigated. Estimation of evolutionary divergence between sequences was conducted using Tamura-Nei model. Considering 440 individuals, 35 (5%) variable sites and an average variation of 1.9% were found between specimens. Highest divergence was found between Med11 and Med04-Med07 populations; with a genetic distance value of 0.039 (3.9%). Estimation of transition/transversion bias (R) was made under the Tamura-Nei model and resulted as 2.32. Phylogenetic tree was constructed using four methods: neighbor joining (NJ), minimum evolution (ME), maximum likelihood (ML) and unweighted pair-group method of arithmetic average (UPGMA). Results from clustering patterns of the consensus tree, with the sum of branch length ¼ 0.05189, pointed out a correlation between genetic and geographic distance.
Conference Presentations by Hasan Huseyin Atar
20. Su Altı Bilim ve Teknoloji Toplantısı - Urla, Bildiri Özet Kitapçığı
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Papers by Hasan Huseyin Atar
Conference Presentations by Hasan Huseyin Atar