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Papers by Ozcan Ozen

Research paper thumbnail of Assessing Age-0 Year-Class Strength of Fast-Growing Largemouth Bass in a Tropical Reservoir

North American Journal of Fisheries Management, 2005

... a & Richard L. Noble a pages 163-170. ... [Taylor & Francis Online], [CSA] View all r... more ... a & Richard L. Noble a pages 163-170. ... [Taylor & Francis Online], [CSA] View all references). These and other studies have led to a standardization of procedures for indexing adult largemouth bass abundance by traditional boat electrofisher (Noble 200224. Noble, RL 2002. ...

Research paper thumbnail of Relationship Between Largemouth Bass Recruitment and Water Level Dynamics in a Puerto Rico Reservoir

Lake and Reservoir Management, 2005

... Ozcan Ozen1 Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC... more ... Ozcan Ozen1 Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC 27695-7617, USA oozen@yahoo.com Richard L. Noble Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC 27695-7617, USA Abstract ...

Research paper thumbnail of Microbiological Quality of Seafood in the Dardanelles, Turkey

Pakistan Journal of Biological Sciences, 2006

... for Scientific Information Microbiological Quality of Seafood in the Dardanelles, Turkey Fatm... more ... for Scientific Information Microbiological Quality of Seafood in the Dardanelles, Turkey Fatma Arik Colakoglu, Ozcan Ozen and Fikret Cakir Faculty ... contamination in plant sanitation, in waters and various food products, including seafood (El-Zanfaly and Shaban, 1991; Shapton ...

Research paper thumbnail of Spatial and temporal variation of Palaemon adspersus, Palaemon elegans, and Crangon crangon (Decapoda: Caridea) in the southern Black Sea

Estuarine, Coastal and Shelf Science, 2008

In order to characterize the seasonal, bathymetric, and spatial distribution of the species, Pala... more In order to characterize the seasonal, bathymetric, and spatial distribution of the species, Palaemon adspersus, Palaemon elegans, and Crangon crangon, shrimps were sampled with a beam trawl in four stations at depths between 1 and 30 m from February 2002 to January 2004 on the Sinop Peninsula coasts of the southern Black Sea. One-way analysis of similarity (ANOSIM) results demonstrated that the caridean composition was significantly different (p < 0.001) between seasons and between sampling areas. No significant relationship of the caridean composition was evident between depth zones ranging from 1 to 30 m. These three carideans occurred together in 28.5% of the sampling occasions. Different seasonal migration pattern was evident for all the three species. Palaemon adspersus migrated inshore during relatively higher water temperatures, whereas C. crangon density decreased in the shallow waters during the same period, and P. elegans population was mostly observed at depth zones of 5-10 m and was only observed in the 30 m depth zone in winter. The abiotic factors that characterize the coexistence of these three carideans were primarily determined by the habitat types and bottom structures.

Research paper thumbnail of A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20,... more E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Sayı/Issue (3-4): 413 – 418 ... © Ege University Press ISSN 1300 - 1590 http://jfas.ege.edu .tr/ ... A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

Research paper thumbnail of Temporary Timing of Reproductive Traits with Respect to Environmental Variables in Turkish Crayfish in Yenice Reservoir

This study was carried out to determine the relationships between physicochemical parameters and ... more This study was carried out to determine the relationships between physicochemical parameters and morphometric and reproduction features of the crayfishes (Astacus leptodactylus) in Yenice Central Irrigation Pond. Results of MDS analysis revealed that the relationships between physicochemical parameters and morphometric features and reproduction features in crayfishes could be explained at different rates. Reproduction features such as fecundity and sperm production, were within a close relationship with temperature, magnesium, conductivity, dissolved oxygen, and the abdomen weight, carapace weight, abdominal width, carapace width, abdomen length, carapace length from morphometric features were within a close relationship especially with dissolved oxygen, magnesium, calcium, and temperature. These relationships could play an important role while considering the selection of maternal females for cultural environments and for the management of productive population, and for the selecti...

Research paper thumbnail of Çanakkale Boğazi ve Civarinda Yakalanan İstavrit Baliğinin Bazi Biyolojik Özellikleri

Some biological parameters of horse mackerel Trachurus trachurus (L., 1758) caught from the Darda... more Some biological parameters of horse mackerel Trachurus trachurus (L., 1758) caught from the Dardanelles. Growth parameters and gonadosomatic index (GSI) (%) of 459 horse mackerel Trachurus trachurus (L. 1758) were studied in Dardanelles between September 2001 and August 2002. The age composition of the sampled population varied between 0 and 3, where the 0-age group contained the highest number of

Research paper thumbnail of A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

EU Journal of …, 2003

E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Say... more E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Sayı/Issue (3-4): 413 – 418 ... © Ege University Press ISSN 1300 - 1590 http://jfas.ege.edu .tr/ ... A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

Research paper thumbnail of First record of Gobius couchi Miller & El-Tawil, 1974 from the Aegean Sea (Pisces: Gobiidae)

Http Dx Doi Org 10 1080 09397140 2009 10638354, Feb 28, 2013

Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protubera... more Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protuberant nostril (Fig. 4, right), postmental scales distinctly enlarged (Fig. 4 left), belly scales larger than dorsal scales, no preanal pores present, rostral scale reaching the nostril but first upper labial not, toes cylindrical in shape and two cloacal tubercle rows present. Its described range is the Arabian Peninsula, along the western and southern coasts of the Arabian Gulf including Bahrain and central Oman (LEVITON et al. 1992), so this record ...

Research paper thumbnail of Temporal Variations of the Demersal Fish Community in the Shallow Waters of Çanakkale Strait, North Aegean Sea, during the Course of a Mucilage Event

Turkish Journal of Fisheries and Aquatic Sciences

The main aim of this study was to determine the mucilage event effect on the temporal variations ... more The main aim of this study was to determine the mucilage event effect on the temporal variations of the shallow water demersal fish community in the Çanakkale Strait. Sixty-one different demersal fish species were collected with a beach seine between September 2006 and August 2009. Mucilage event was observed between September 2007 and July 2008 (mucilage period) in the shallow waters of Çanakkale Strait. Species abundance and richness decreased in winter and increased in spring and in summer and was related to water temperature variations. Demersal fish species composition was significantly different between seasons but these differences were mainly related to water temperature variations. For the same seasons in different years (pre-mucilage, during mucilage, and post-mucilage), no differences of fish abundance and species richness were evident. In conclusion, the fish community data from our shallow water samplings during the course of a mucilage event does not suggest any signif...

Research paper thumbnail of Feeding Habits of the Marbled Goby, Pomatoschistus Marmoratus (Actinopterygii: Perciformes: Gobiidae), in the Çanakkale Strait, Northern Aegean Sea, Turkey

Acta Ichthyologica Et Piscatoria

Pomatoschistus marmoratus (Risso, 1810) is a small demersal fish and one of the dominant species ... more Pomatoschistus marmoratus (Risso, 1810) is a small demersal fish and one of the dominant species inhabiting shallow waters of the Mediterranean. Information, however, on their feeding habits are still scarce. In this study, the stomach contents of P. marmoratus were investigated in order to determine feeding habits according to seasons and sizes. The fish were collected monthly from 3 stations between October 2008 and August 2009, using a beach seine, from the shallow waters of the Çanakkale Strait, Turkey. A total of 383 P. marmoratus, ranging from 13 to 69 mm TL, were analysed. The most important prey items in the stomach contents were copepods and amphipods. The numerical abundance of each food item in the stomach contents varied significantly with season. The diet of juvenile P. marmoratus consisted mainly of copepods. The occurrence of largest prey items such as amphipods and bivalves appeared relatively higher in adults. However, no significant differences were found between t...

Research paper thumbnail of Age, growth and otolith morphometry of Capoeta angorae (Cyprinidae) collected from Menzelet Reservoir and Fırnız Stream (Turkey)

Age, growth rates and otolith morphometry of Capoeta angorae, collected by using electro shocker,... more Age, growth rates and otolith morphometry of Capoeta angorae, collected by using electro shocker, were determined from the Fırnız Stream and Menzelet Reservoir between August 2011 and November 2012. A total of 175 otoliths were obtained from C. angorae that ranged between 7.5 and 27.0 cm L were used in the analysis. The overall male : female ratio (M : F = 1.52 : 1.00) was biased in favour of males. Student’s t-test revealed significant differences between sexes, regarding total length (P < 0.05). The length–weight relationships were calculated as W = 0.0128L2.8703 (R2= 0.975) for females, W = 0.0103L2.9462 (R2 = 0.969) for males and W = 0.0097L2.9629 (R2 = 0.978) for all specimens. Otolith length (OL), width (OW) and radius (OR) were ranged between 1.67 – 3.45 mm, 1.39 – 2.82 mm and 0.89 – 1.70 mm, respectively. The von Bertalanffy growth models were L∞ = 27.55 cm (L), K = 0.465 (year-1), t0 = -0.539 (year), females; L∞ = 22.84 cm (L), K = 0.772 (year-1), t0 = -0.71 (year) males...

Research paper thumbnail of First record of Gobius couchi (Pisces: Gobiidae) from the Aegean Sea

Zoology in the Middle East

Research paper thumbnail of Feeding habits and diet overlap of juveniles of 2 sparids, Diplodus puntazzo (Walbaum, 1792) and Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817), from the North Aegean Sea of Turkey

Turkish Journal of Zoology

The stomach contents of juvenile sharpsnout sea bream, Diplodus puntazzo, and juvenile two-banded... more The stomach contents of juvenile sharpsnout sea bream, Diplodus puntazzo, and juvenile two-banded sea bream, Diplodus vulgaris, were investigated in order to determine feeding habits and diet overlap among them. Fish were collected from October 2008 to August 2009 using a beach seine net from the Çanakkale coasts of Turkey. A total of 129 juvenile D. puntazzo (ranging from 13 mm to 77 mm total length) and 951 D. vulgaris (ranging from 15 mm to 97 mm total length) were collected during the sampling periods in the study area. The stomach content analyses showed that the diet of both species mainly comprised copepods and amphipods. In addition, algae were found in the stomach contents. No significant differences were found between the feeding habits of juvenile D. vulgaris and D. puntazzo (ANOSIM; global R statistic = –0.0158; P > 0.05). An important overlap in the diet calculated using the Schoener index was recorded as 0.75 for D. puntazzo and D. vulgaris. Consequently, there was ...

Research paper thumbnail of Çanakkale İlindeki Su Ürünleri Tüketim Davranişlarinin Değerlendirilmesi

The evaluation of fish consumption in Çanakkale. Fish products are an important diet in human con... more The evaluation of fish consumption in Çanakkale. Fish products are an important diet in human consumption because of its animal protein source. In spite of the increasing population and the problems in balanced diet, fish products are not enough consumed in our country. In this study, in order to determine fish consumption habit a public survey was carried out on

Research paper thumbnail of bathymetric distribution, seasonal growth and mortality of the deep-water rose shrimp Parapenaeus longirostris (Decapoda: Penaeidae) in an unexploited stocks in Saros Bay, Aegean Sea

To describe the growth, mortality and distribution pattern of the deep-water rose shrimp, Parapen... more To describe the growth, mortality and distribution pattern of the deep-water rose shrimp, Parapenaeus longirostris in an unexploited resource, 301 trawl surveys were conducted between 20 and 465 m water depths from February 2005 to September 2008 in Saros Bay, Aegean Sea. Bathymetrical biomass distribution of the deep-water rose shrimp shown a clear tendency towards the deeper waters with highest biomass estimations exceeding 50 kg h-1 obtained in water depths between 201 and 300 m. Von Bertalanffy Growth (VBG) parameters were estimated from monthly Carapace Length (CL) frequency distribution data using three different methods: ELEFAN, PROJMAT and SLCA. For the data of this study, the seasonal VBG parameters obtained from ELEFAN was considered to best describe the growth pattern and were estimated as L∞ = 34.7 mm, K = 1.05 year-1, to = -0.95 year, WP = 0.87 (i.e., November) and C = 0.47 for females and as L∞ = 27.0 mm, K = 1.49 year-1, to = -0.88 year, WP = 0.35 (i.e., May), C =...

Research paper thumbnail of Age and Growth of Capoeta Erhani (Actinopterygii: Cypriniformes: Cyprinidae) From the Menzelet Reservoir, Turkey

Acta Ichthyologica Et Piscatoria, 2014

Research paper thumbnail of First record of Gobius couchi Miller & El-Tawil, 1974 from the Aegean Sea (Pisces: Gobiidae)

Zoology in the Middle East, 2009

Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protubera... more Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protuberant nostril (Fig. 4, right), postmental scales distinctly enlarged (Fig. 4 left), belly scales larger than dorsal scales, no preanal pores present, rostral scale reaching the nostril but first upper labial not, toes cylindrical in shape and two cloacal tubercle rows present. Its described range is the Arabian Peninsula, along the western and southern coasts of the Arabian Gulf including Bahrain and central Oman (LEVITON et al. 1992), so this record ...

Research paper thumbnail of Growth and hatching of annular seabream, Diplodus annularis, from Turkey determined from otolith microstructure

Journal of the Marine Biological Association of the United Kingdom, 2014

Otolith microstructure analysis was used to determine daily growth rate and hatching periods of y... more Otolith microstructure analysis was used to determine daily growth rate and hatching periods of young of the year (YOY) annular seabream, Diplodus annularis, collected by using beach seine from Ç anakkale shallow waters between January and December 2007. Total length of the YOY D. annularis was between 20 and 85 mm and the daily ages ranged between 27 and 205 d. Somatic growth rate, estimated by fitting a linear regression to the age -length data set, was calculated as 0.369 mm d 21 . Seasonal changes in the growth rate of the YOY D. annularis have been found to be 0.381, 0.369, 0.357 and 0.308 mm d 21 for individuals that hatched in spring, summer, autumn and winter, respectively. Analysis of covariance indicated that there were no significant differences (P . 0.05) in the growth rates between the seasons. Hatching period of the YOY D. annularis was estimated to occur between March and September, with relatively higher hatching frequency in June.

Research paper thumbnail of Growth, mortality and hatch-date distributions of striped sea bream Lithognathus mormyrus inhabiting the Çanakkale Strait, Turkey

Journal of the Marine Biological Association of the United Kingdom, 2014

This paper studies age, growth and hatch date distributions of young of the year striped sea brea... more This paper studies age, growth and hatch date distributions of young of the year striped sea bream Lithognathus mormyrus from Canakkale near shores by using a beach seine during September 2006-December 2007. Using otolith microstructure analysis, a total of 416 specimens ranging from 20 to 103 mm L T were aged and found to be between 30 and 307 days old. Average growth rates were estimated to 0.325 mm d 21 . The juvenile instantaneous mortality coefficient was found to be 0.0219, which corresponds to a daily mortality of 2.16%. The hatching period of the striped sea bream was determined to occur between April and January, with relatively higher hatching frequency in August. 2008) Ageing seabreams: a comparative study between scales and otoliths. Fisheries Research 89, 37-48.

Research paper thumbnail of Assessing Age-0 Year-Class Strength of Fast-Growing Largemouth Bass in a Tropical Reservoir

North American Journal of Fisheries Management, 2005

... a & Richard L. Noble a pages 163-170. ... [Taylor & Francis Online], [CSA] View all r... more ... a & Richard L. Noble a pages 163-170. ... [Taylor & Francis Online], [CSA] View all references). These and other studies have led to a standardization of procedures for indexing adult largemouth bass abundance by traditional boat electrofisher (Noble 200224. Noble, RL 2002. ...

Research paper thumbnail of Relationship Between Largemouth Bass Recruitment and Water Level Dynamics in a Puerto Rico Reservoir

Lake and Reservoir Management, 2005

... Ozcan Ozen1 Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC... more ... Ozcan Ozen1 Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC 27695-7617, USA oozen@yahoo.com Richard L. Noble Department of Zoology North Carolina State University Campus Box 7617 Raleigh, NC 27695-7617, USA Abstract ...

Research paper thumbnail of Microbiological Quality of Seafood in the Dardanelles, Turkey

Pakistan Journal of Biological Sciences, 2006

... for Scientific Information Microbiological Quality of Seafood in the Dardanelles, Turkey Fatm... more ... for Scientific Information Microbiological Quality of Seafood in the Dardanelles, Turkey Fatma Arik Colakoglu, Ozcan Ozen and Fikret Cakir Faculty ... contamination in plant sanitation, in waters and various food products, including seafood (El-Zanfaly and Shaban, 1991; Shapton ...

Research paper thumbnail of Spatial and temporal variation of Palaemon adspersus, Palaemon elegans, and Crangon crangon (Decapoda: Caridea) in the southern Black Sea

Estuarine, Coastal and Shelf Science, 2008

In order to characterize the seasonal, bathymetric, and spatial distribution of the species, Pala... more In order to characterize the seasonal, bathymetric, and spatial distribution of the species, Palaemon adspersus, Palaemon elegans, and Crangon crangon, shrimps were sampled with a beam trawl in four stations at depths between 1 and 30 m from February 2002 to January 2004 on the Sinop Peninsula coasts of the southern Black Sea. One-way analysis of similarity (ANOSIM) results demonstrated that the caridean composition was significantly different (p < 0.001) between seasons and between sampling areas. No significant relationship of the caridean composition was evident between depth zones ranging from 1 to 30 m. These three carideans occurred together in 28.5% of the sampling occasions. Different seasonal migration pattern was evident for all the three species. Palaemon adspersus migrated inshore during relatively higher water temperatures, whereas C. crangon density decreased in the shallow waters during the same period, and P. elegans population was mostly observed at depth zones of 5-10 m and was only observed in the 30 m depth zone in winter. The abiotic factors that characterize the coexistence of these three carideans were primarily determined by the habitat types and bottom structures.

Research paper thumbnail of A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20,... more E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Sayı/Issue (3-4): 413 – 418 ... © Ege University Press ISSN 1300 - 1590 http://jfas.ege.edu .tr/ ... A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

Research paper thumbnail of Temporary Timing of Reproductive Traits with Respect to Environmental Variables in Turkish Crayfish in Yenice Reservoir

This study was carried out to determine the relationships between physicochemical parameters and ... more This study was carried out to determine the relationships between physicochemical parameters and morphometric and reproduction features of the crayfishes (Astacus leptodactylus) in Yenice Central Irrigation Pond. Results of MDS analysis revealed that the relationships between physicochemical parameters and morphometric features and reproduction features in crayfishes could be explained at different rates. Reproduction features such as fecundity and sperm production, were within a close relationship with temperature, magnesium, conductivity, dissolved oxygen, and the abdomen weight, carapace weight, abdominal width, carapace width, abdomen length, carapace length from morphometric features were within a close relationship especially with dissolved oxygen, magnesium, calcium, and temperature. These relationships could play an important role while considering the selection of maternal females for cultural environments and for the management of productive population, and for the selecti...

Research paper thumbnail of Çanakkale Boğazi ve Civarinda Yakalanan İstavrit Baliğinin Bazi Biyolojik Özellikleri

Some biological parameters of horse mackerel Trachurus trachurus (L., 1758) caught from the Darda... more Some biological parameters of horse mackerel Trachurus trachurus (L., 1758) caught from the Dardanelles. Growth parameters and gonadosomatic index (GSI) (%) of 459 horse mackerel Trachurus trachurus (L. 1758) were studied in Dardanelles between September 2001 and August 2002. The age composition of the sampled population varied between 0 and 3, where the 0-age group contained the highest number of

Research paper thumbnail of A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

EU Journal of …, 2003

E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Say... more E.Ü. Su Ürünleri Dergisi 2003 EU Journal of Fisheries & Aquatic Sciences 2003 Cilt/Volume 20, Sayı/Issue (3-4): 413 – 418 ... © Ege University Press ISSN 1300 - 1590 http://jfas.ege.edu .tr/ ... A Comparative Analysis of Istanbul Fish Market Records Between 1998 and 2001

Research paper thumbnail of First record of Gobius couchi Miller & El-Tawil, 1974 from the Aegean Sea (Pisces: Gobiidae)

Http Dx Doi Org 10 1080 09397140 2009 10638354, Feb 28, 2013

Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protubera... more Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protuberant nostril (Fig. 4, right), postmental scales distinctly enlarged (Fig. 4 left), belly scales larger than dorsal scales, no preanal pores present, rostral scale reaching the nostril but first upper labial not, toes cylindrical in shape and two cloacal tubercle rows present. Its described range is the Arabian Peninsula, along the western and southern coasts of the Arabian Gulf including Bahrain and central Oman (LEVITON et al. 1992), so this record ...

Research paper thumbnail of Temporal Variations of the Demersal Fish Community in the Shallow Waters of Çanakkale Strait, North Aegean Sea, during the Course of a Mucilage Event

Turkish Journal of Fisheries and Aquatic Sciences

The main aim of this study was to determine the mucilage event effect on the temporal variations ... more The main aim of this study was to determine the mucilage event effect on the temporal variations of the shallow water demersal fish community in the Çanakkale Strait. Sixty-one different demersal fish species were collected with a beach seine between September 2006 and August 2009. Mucilage event was observed between September 2007 and July 2008 (mucilage period) in the shallow waters of Çanakkale Strait. Species abundance and richness decreased in winter and increased in spring and in summer and was related to water temperature variations. Demersal fish species composition was significantly different between seasons but these differences were mainly related to water temperature variations. For the same seasons in different years (pre-mucilage, during mucilage, and post-mucilage), no differences of fish abundance and species richness were evident. In conclusion, the fish community data from our shallow water samplings during the course of a mucilage event does not suggest any signif...

Research paper thumbnail of Feeding Habits of the Marbled Goby, Pomatoschistus Marmoratus (Actinopterygii: Perciformes: Gobiidae), in the Çanakkale Strait, Northern Aegean Sea, Turkey

Acta Ichthyologica Et Piscatoria

Pomatoschistus marmoratus (Risso, 1810) is a small demersal fish and one of the dominant species ... more Pomatoschistus marmoratus (Risso, 1810) is a small demersal fish and one of the dominant species inhabiting shallow waters of the Mediterranean. Information, however, on their feeding habits are still scarce. In this study, the stomach contents of P. marmoratus were investigated in order to determine feeding habits according to seasons and sizes. The fish were collected monthly from 3 stations between October 2008 and August 2009, using a beach seine, from the shallow waters of the Çanakkale Strait, Turkey. A total of 383 P. marmoratus, ranging from 13 to 69 mm TL, were analysed. The most important prey items in the stomach contents were copepods and amphipods. The numerical abundance of each food item in the stomach contents varied significantly with season. The diet of juvenile P. marmoratus consisted mainly of copepods. The occurrence of largest prey items such as amphipods and bivalves appeared relatively higher in adults. However, no significant differences were found between t...

Research paper thumbnail of Age, growth and otolith morphometry of Capoeta angorae (Cyprinidae) collected from Menzelet Reservoir and Fırnız Stream (Turkey)

Age, growth rates and otolith morphometry of Capoeta angorae, collected by using electro shocker,... more Age, growth rates and otolith morphometry of Capoeta angorae, collected by using electro shocker, were determined from the Fırnız Stream and Menzelet Reservoir between August 2011 and November 2012. A total of 175 otoliths were obtained from C. angorae that ranged between 7.5 and 27.0 cm L were used in the analysis. The overall male : female ratio (M : F = 1.52 : 1.00) was biased in favour of males. Student’s t-test revealed significant differences between sexes, regarding total length (P < 0.05). The length–weight relationships were calculated as W = 0.0128L2.8703 (R2= 0.975) for females, W = 0.0103L2.9462 (R2 = 0.969) for males and W = 0.0097L2.9629 (R2 = 0.978) for all specimens. Otolith length (OL), width (OW) and radius (OR) were ranged between 1.67 – 3.45 mm, 1.39 – 2.82 mm and 0.89 – 1.70 mm, respectively. The von Bertalanffy growth models were L∞ = 27.55 cm (L), K = 0.465 (year-1), t0 = -0.539 (year), females; L∞ = 22.84 cm (L), K = 0.772 (year-1), t0 = -0.71 (year) males...

Research paper thumbnail of First record of Gobius couchi (Pisces: Gobiidae) from the Aegean Sea

Zoology in the Middle East

Research paper thumbnail of Feeding habits and diet overlap of juveniles of 2 sparids, Diplodus puntazzo (Walbaum, 1792) and Diplodus vulgaris (Geoffroy Saint-Hilaire, 1817), from the North Aegean Sea of Turkey

Turkish Journal of Zoology

The stomach contents of juvenile sharpsnout sea bream, Diplodus puntazzo, and juvenile two-banded... more The stomach contents of juvenile sharpsnout sea bream, Diplodus puntazzo, and juvenile two-banded sea bream, Diplodus vulgaris, were investigated in order to determine feeding habits and diet overlap among them. Fish were collected from October 2008 to August 2009 using a beach seine net from the Çanakkale coasts of Turkey. A total of 129 juvenile D. puntazzo (ranging from 13 mm to 77 mm total length) and 951 D. vulgaris (ranging from 15 mm to 97 mm total length) were collected during the sampling periods in the study area. The stomach content analyses showed that the diet of both species mainly comprised copepods and amphipods. In addition, algae were found in the stomach contents. No significant differences were found between the feeding habits of juvenile D. vulgaris and D. puntazzo (ANOSIM; global R statistic = –0.0158; P > 0.05). An important overlap in the diet calculated using the Schoener index was recorded as 0.75 for D. puntazzo and D. vulgaris. Consequently, there was ...

Research paper thumbnail of Çanakkale İlindeki Su Ürünleri Tüketim Davranişlarinin Değerlendirilmesi

The evaluation of fish consumption in Çanakkale. Fish products are an important diet in human con... more The evaluation of fish consumption in Çanakkale. Fish products are an important diet in human consumption because of its animal protein source. In spite of the increasing population and the problems in balanced diet, fish products are not enough consumed in our country. In this study, in order to determine fish consumption habit a public survey was carried out on

Research paper thumbnail of bathymetric distribution, seasonal growth and mortality of the deep-water rose shrimp Parapenaeus longirostris (Decapoda: Penaeidae) in an unexploited stocks in Saros Bay, Aegean Sea

To describe the growth, mortality and distribution pattern of the deep-water rose shrimp, Parapen... more To describe the growth, mortality and distribution pattern of the deep-water rose shrimp, Parapenaeus longirostris in an unexploited resource, 301 trawl surveys were conducted between 20 and 465 m water depths from February 2005 to September 2008 in Saros Bay, Aegean Sea. Bathymetrical biomass distribution of the deep-water rose shrimp shown a clear tendency towards the deeper waters with highest biomass estimations exceeding 50 kg h-1 obtained in water depths between 201 and 300 m. Von Bertalanffy Growth (VBG) parameters were estimated from monthly Carapace Length (CL) frequency distribution data using three different methods: ELEFAN, PROJMAT and SLCA. For the data of this study, the seasonal VBG parameters obtained from ELEFAN was considered to best describe the growth pattern and were estimated as L∞ = 34.7 mm, K = 1.05 year-1, to = -0.95 year, WP = 0.87 (i.e., November) and C = 0.47 for females and as L∞ = 27.0 mm, K = 1.49 year-1, to = -0.88 year, WP = 0.35 (i.e., May), C =...

Research paper thumbnail of Age and Growth of Capoeta Erhani (Actinopterygii: Cypriniformes: Cyprinidae) From the Menzelet Reservoir, Turkey

Acta Ichthyologica Et Piscatoria, 2014

Research paper thumbnail of First record of Gobius couchi Miller & El-Tawil, 1974 from the Aegean Sea (Pisces: Gobiidae)

Zoology in the Middle East, 2009

Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protubera... more Measurements: snout to vent length 54 mm, tail (tip to vent) 39 mm. It had a distinctly protuberant nostril (Fig. 4, right), postmental scales distinctly enlarged (Fig. 4 left), belly scales larger than dorsal scales, no preanal pores present, rostral scale reaching the nostril but first upper labial not, toes cylindrical in shape and two cloacal tubercle rows present. Its described range is the Arabian Peninsula, along the western and southern coasts of the Arabian Gulf including Bahrain and central Oman (LEVITON et al. 1992), so this record ...

Research paper thumbnail of Growth and hatching of annular seabream, Diplodus annularis, from Turkey determined from otolith microstructure

Journal of the Marine Biological Association of the United Kingdom, 2014

Otolith microstructure analysis was used to determine daily growth rate and hatching periods of y... more Otolith microstructure analysis was used to determine daily growth rate and hatching periods of young of the year (YOY) annular seabream, Diplodus annularis, collected by using beach seine from Ç anakkale shallow waters between January and December 2007. Total length of the YOY D. annularis was between 20 and 85 mm and the daily ages ranged between 27 and 205 d. Somatic growth rate, estimated by fitting a linear regression to the age -length data set, was calculated as 0.369 mm d 21 . Seasonal changes in the growth rate of the YOY D. annularis have been found to be 0.381, 0.369, 0.357 and 0.308 mm d 21 for individuals that hatched in spring, summer, autumn and winter, respectively. Analysis of covariance indicated that there were no significant differences (P . 0.05) in the growth rates between the seasons. Hatching period of the YOY D. annularis was estimated to occur between March and September, with relatively higher hatching frequency in June.

Research paper thumbnail of Growth, mortality and hatch-date distributions of striped sea bream Lithognathus mormyrus inhabiting the Çanakkale Strait, Turkey

Journal of the Marine Biological Association of the United Kingdom, 2014

This paper studies age, growth and hatch date distributions of young of the year striped sea brea... more This paper studies age, growth and hatch date distributions of young of the year striped sea bream Lithognathus mormyrus from Canakkale near shores by using a beach seine during September 2006-December 2007. Using otolith microstructure analysis, a total of 416 specimens ranging from 20 to 103 mm L T were aged and found to be between 30 and 307 days old. Average growth rates were estimated to 0.325 mm d 21 . The juvenile instantaneous mortality coefficient was found to be 0.0219, which corresponds to a daily mortality of 2.16%. The hatching period of the striped sea bream was determined to occur between April and January, with relatively higher hatching frequency in August. 2008) Ageing seabreams: a comparative study between scales and otoliths. Fisheries Research 89, 37-48.