An investigation on some population parametres of European pilchard (Sardina pilchardus Walbaum 1792) in the Dardanelles
Ahmet Adem Tekinay, Pinar Akyüz, Derya Güroy, Ebru Gülçin Kahyaoglu, Mustafa Alpaslan
Çanakkale 18 Mart University, Fisheries Faculty, 17100 Çanakkale, TURKEY
Abstract
In this study, the length-weight relationship, condition factor (CF), gonadosomatic index (GSI) and meat yield of 363 European pilchard (Sardina pilchardus Walbaum, 1792) sampled from Dardanelles were studied between September 2001 and April 2002. The length-weight relationship was calculated as W = 0.0172L 2.68; R2 = 0.71. Mean condition factor of males and females varied between 0.66-0.87% and 0.68-0.86%, while mean GSI values were 0.34-4.83% and 0.47-5.95%, respectively, Percentage meat yield of males and females were varied as 64.21-75.56 and 64.20-81.50, respectively.
Keywords: European pilchard, gonadosomatic index (GSI), condition factor, length-weight relationship, meat yield, Dardanelles.
Oil and detergent pollution of sea water in Dardanelles in 2001 – 2002
Kasim Cemal Güven, Kartal Çetintürk, Mustafa Alpaslan, Ahmet Adem Tekinay
Istanbul University, Institute of Marine Sciences and Management, Vefa, Istanbul, TURKEY
18 March University, Faculty of Fisheries, Çanakkale, TURKEY
Abstract
Pollution by oil and detergent was investigated in sea water of Dardanelles in this work. The highest pollution in surface water was found for oil 232.241 µg/L in Gelibolu and 15.38 µg/L in Kilitbahir and for detergent 62.05 µg/L in Gelibolu, 105.8 11 µg/L in Lapseki and 44.38 µg/L in Kilitbahir. The pollution level was high near seawage point of Çanakkale as 226.27 µg/L for oil and 148.56 µg/L for detergent. The pollution was found higher in 10 m depth than in surface water.
Keywords: Oil, detergent, pollution, Dardanelles
The Benthic macroinvertebrate fauna of Sarıkum Lake and spring waters (Sinop)
Mehmet Akbulut, Mehmet Öztürk, Meral Öztürk
University of Ondokuz Mayis, Sinop Fisheries Faculty, Department of Basic Science, Sinop, TURKEY
University of Celal Bayar, Faculty of Science-Arts, Department of Biology, Manisa, TURKEY
Abstract
In this study, the community composition of benthic macroinvertebrate fauna from Sarikum Lake and spring waters were investigated monthly between June 1995 and May 1996. Physico-chemical parameters of the sampling stations were measured. The fauna were represented with 26 species belonging to 6 systematic groups (Gastropoda, Bivalvia, Insecta (larvae), Crustacea, Polychaete and Turbellaria classis). Insecta was found as predominant in respect to species diversity. The species belonging to Mollusca and Crustacea classis were in minority. In general, most of the species in SarIkum Lake were eurythopic organisms of eutrophic lakes.
Keywords: Sariıkum Lake (Sinop), spring water, benthic macroinvertebrate fauna
Degradation of LAS in distilled, tap and sea water
Hüseyin Koç, Kasim C. Güven, Tuncay Gezgin
Istanbul University, Institute of Marine Sciences and Management, Vefa, 34470, Istanbul, TURKEY
Abstract
The degradation of LAS was investigated in distilled, tap and sea water. The analysis of LAS in HPLC showed that the number and size of peaks decreased during the test. Degradation began the first day and continued rapidly. LAS degraded in 20 days 84.8% in distilled water, in 14 days 84.8% in tap water and in 14 days 93.2% in sea water. The number of peaks were diminished and their areas reduced on HPLC chromatograms of LAS during the tests. The degradation of LAS was ranked as sea water > tap water > distilled water.
Keywords: LAS, degradation, distilled, tap, sea water.
Geomorphology of Hereke-Körfez area and its relation to the submarine morphology of the centre basin of the Gulf of Izmit
A. Evren Erginal, T. Ahmet Ertek
Istanbul University, Faculty of Literature Department of Geography, Laleli, Istanbul,TURKEY
Abstract
The present study is an attempt to interpret the geomorphology of the Hereke-Körfez area and the submarine morphology of the Gulf of Izmit. Geomorphological investigations have been carried out on the E-W trending normal fault, Hereke-Körfez fault, which constitutes the northern segment of North Anatolian Fault (NAF). Along this 10 km-long zone, the morphological features of this area have been considered according to the neotectonic features within and around the stream basins. Fault facettas, stream captures, deep dissection in young valleys, hanging valleys, en-echelon erosional surfaces, convexity and slope breaks in thalweg profiles indicate the youth phase in fluvvial geomorphological evolution. Active submarine landslides in front of the submarine deltas and the en-echelon erosional surface located at – 40 m to – 160 m imply the active tectonic in the Gulf of Izmit. The morphometric features of erosional surfaces indicate a collapse of about 190 m in the gulf. This result is supported by the deep valley form in the depression. It is concluded that this buried valley has been deepened by the en-echelon faultings. The aluvvial cones developed along the Hereke-Körfez Fault. That there is no marine terrace in this zone appears to be related to the sediment input from north by the creeks, which covered the marine terraces probably. These terraces might have later been deepened by en-echelon faultings. Thus, the deep drill holes are needed to find out the vertical cross-section of these young deposits. This will also reveal if the en-echelon erosional surfaces have been deformed by the activity of NAF. Consequently, the hinterland morphology of the Gulf of Izmit could well be used as a reliable criteria to assess the morpho-tectonic features in this coastal area.
Keywords: North Anatolian Fault, Izmit Bay, neotectonic movements, fluvial geomorphology
Geomorphology of Hereke-Körfez area and its relation to the submarine morphology of the centre basin of the Gulf of Izmit
A. Evren Erginal, T. Ahmet Ertek
Degradation of LAS in distilled, tap and sea water
Hüseyin Koç, Kasim C. Güven, Tuncay Gezgin
The benthic macroinvertebrate fauna of Sarikum Lake and Spring Waters (Sinop)
Mehmet Akbulut, Mehmet Oztürk, Meral Öztürk
Oil and detergent pollution of sea water in Dardanelles in 2001 – 2002
Kasim Cemal Güven, Kartal Çetintürk, Mustafa Alpaslan, Ahmet Adem Tekinay
An investigation on some population parametres of European pilchard (Sardina pilchardus Walbaum 1792) in the Dardanelles
Ahmet Adem Tekinay, Pinar Akyüz, Derya Güroy, Ebru Gülçin Kahyaoglu, Mustafa Alpaslan
