REMOTE SENSING OF OIL FILMS ON THE SEA SURFACE

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

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A COMPARATIVE STUDY ON WATER COLUMN AND BOTTOM FEEDING HABIT OF TANK REARED BROOK TROUT (SALVELINUS FONTINALIS)

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

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AN EPIZOOTIOLOGICAL STUDY ON MOTHOCYA EPIMERICA COSTA, 1851 (FLABELLIFERA: CYMOTHOIDAE) INFESTATIONS IN SAND SMELT, ATHERINA BOYERI RISSO, 1810 (PERCIFORMES: ATHERINIDAE) FOUND IN THE SINOP COASTS OF THE BLACK SEA

An Epizootiological study on Mothocya epimerica Costa, 1851 (Flabellifera: Cymothoidae) infestations in Sand Smelt, Atherina boyeri Risso, 1810 (Perciformes: Atherinidae) found in the Sinop Coasts of the Black Sea

Ahmet Özer

University of Ondokuzmayis, Sinop Fisheries Faculty, 57000, Sinop, TURKEY

Abstract

In this study, a parasitic isopod, Mothocya epimerica (Flabellifera: Cymothoidae) is reported on the Sand Smelt, Atherina boyeri, from a small stream in the Sinop coast of the Black Sea. A total of 320 fish were investigated throughout the study period. All specimens of M. epimerica were found in the branchial cavities of Atherina boyeri. Infestation prevalence determined was 5% in overall samples, while it was 21.3% in April, the only month in which infestation recorded. Male fish were found to have higher infestation level than female fish. A slight increase in the infestation prevalence was also recorded as the size of fish increased.

KeywordsMothocya epimericaAtherina boyeri, Turkey

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OIL AND DETERGENT POLLUTION ON COASTAL AREAS OF DARDANELLES IN 1996-1997

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

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Vol.8 – 2002 – No.3

Infrared Studies on Phyllophora nervosa Agar and Comparison with Various Agars and Carrageenans
Murside Sur, Kasim Cemal Güven

Check-List of the Crustacea Fauna of the Bosphorus
Neslihan Balkis, Serhat Albayrak, Hüsamettin Balkis

New record of the heterotrophic Ebridian microflagellate Hermesinium adriaticum Zach. in the eutrophic Izmir Bay (Aegean Sea, Turkey)
Nihayet Bizsel, Sükran Cirik

The Bosphorus: Factors contributing to marine casualties
Necmettin Akten

Toxicity and identification of LAS in tissue of rainbow trout (Oncorhynchus mykiss)
Hüseyin Koç, Kasım Cemal Güven

Vol.8 – 2002 – No.2

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

Vol.8 – 2002 – No.1

Oil and detergent pollution on coastal areas of Dardanelles in 1996-1997
Kasim Cemal Güven, Rüstü Ilgar

An epizootiological study on Mothocya epimerica Costa, 1851 (Flabellifera: Cymothoidae) infestations in Sand Smelt, Atherina boyeri Risso, 1810 (Perciformes: Atherinidae) found in the Sinop Coasts of the Black Sea
Ahmet Özer

A comparative study on water column and bottom feeding habit of tank reared brook trout (Salvelinus fontinalis)
Ibrahim Okumus, Nadir Basçinar

Remote sensing of oil films on the sea surface
Gökhan Kara

The Black Sea one decade after the Bucharest Convention an overview of the international activities in the Black Sea Region
B. Gül Göktepe