Remote sensing of oil films on the sea surface
Gökhan Kara
Maritime Transport and Management Engineering, Engineering Faculty, University of Istanbul, 34850, Avcilar, Istanbul, TURKEY
Abstract
The calculation of the contrast is investigated between clear and oil covered sea surfaces. The problem is to estimate the contribution of these two effects on the total contrast, so that the substance effect can be calculated. Oil film thickness distribution and wave influence to contrast are also studied. It has been shown that there are sufficient contrasts for optical remote sensing of oil film.
Key words: Oil, optic constant, pollution, remote sensing, sea surface

A Comparative Study on Water Column and Bottom Feeding Habit of Tank Reared Brook Trout (Salvelinus fontinalis)
Ibrahim Okumus, Nadir Basçinar
KTO, Faculty of Marine Sciences, Department of Fisheries, 61530 Trabzon, TURKEY
Çanakkale 18 Mart University, Faculty of Fisheries, 17100 Çanakkale, TURKEY
Abstract
Feed consumption, growth rate and feed conversion were compared for brook trout (Salvelinus fontinalis) feeding in the water column or at the tank bottom. The trial that lasted 120 days was conducted in four 300 l fiberglass tanks with two replicates; of 25 fish (mean weight of 45.9 g) in each feeding treatment. Fish fed in the water column exhibited a mean (SD) specific growth rate (SGR) of 0.93 and reached a final mean weight of 138.9 (28.5) g whereas bottom fed fish had a mean SGR of 0.91 and 135.7 (39.2) g body weight. Overall feed conversion ratios (FCR) and condition factors (CF) were assessed as 1.73, 1.22 for the water column and 1.71, 1.25 bottom fed fish. None of these variables showed statistically significant differences between the treatments. Thus, it seems that brook trout may feed both in water column and at bottom in tank culture conditions and this habit could be utilised for reducing feed waste in intensive commercial trout culture.
Key words: Brook trout (Salvelinus fontinalis), feed consumption, food conversion, growth rate, water column or bottom feeding

Oil and detergent pollution on coastal areas of Dardanelles in 1996-1997
Kasim Cemal Güven, Rüstü Ilgar
Institute of Marine Sciences and Management, Istanbul University, Vefa 34470, Istanbul, TURKEY
Abstract
The oil and detergent pollution was determined in coastal waters and sediments in Dardanelles at entrance, Gelibolu and Lapseki; at exit, Çanakkale. The max. level of oil pollution in sea water was 154.76 µg/L at the entrance and 76.30 µ/L at the exit in 1996; 429.54 µg/L and 539.10 µg/L respectively in 1997. In sediments 51.13 µg/g at the entrance and 338.76 µg/L at the exit in 1996 and 369.56 µg/L and 339.56 in 1997. In detergent pollution the max.level was 50.51 µg/L at the entrance and 61.84 at the exit in 1996 and 80.08 µg/L and 61.43 in 1997. The findings indicated that the coastal areas were more polluted than mid-points (shipping route) of Dardanelles and also Sea of Marmara in 1996.
Keywords: Dardanelles, sea water ,sediment, oil, detergent


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