Vol.21 – 2015

Endogenic loliolide, phenylethylamine and exogeniccompounds in marine algae

Kasım Cemal Güven, Burak Coban, Sumru Özkırımlı, Huseyin Erdugan, Ekrem Sezik

Turkish Marine Research Foundation (TUDAV),Beykoz, Istanbul, TURKEY
Faculty of Science and Letters,Department of Chemistry, Bulent Ecevit University, 67100, Zonguldak, TURKEY
Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Istanbul University, Istanbul, TURKEY and Faculty of Pharmacy, University of Yeniyuzyil, Istanbul, TURKEY
Department of Biology, Faculty of Science, 18 Mart University, Çanakkale, TURKEY
Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, TURKEY

Abstract

Endogenic compound loliolide in marine algae Laurencia obtusa var. pyramidata, Chondria capillaris, Ceramium rubrum, Cystaseira barbata, Ulva rigida, and Ulva intestinalis and phenylethylamine in Chondria capillaris were found. Exogenic compounds were mainly petroleum components and phthalate derivatives. These findings are reported for the first time for the examined algae. These algae are eaten in some eastern Asian countries but its human consumption is not recommended because they potentially absorb many pollutants from the aquatic environment.

Keywords: Algae, loliolide, phenylethylamine, exogenic, GC-MS

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Spatio-temporal patterns of abundance, biomass and length-weight relationships of Dasyatis species (Pisces: Dasyatidae) in the Gulf of Antalya, Turkey (Levantine Sea)

Elif Özgür Özbek, Mine Çardak, Turhan Kebapçioğlu

Turkish Marine Research Foundation (TUDAV), P.O. Box: 10, Beykoz, Istanbul, TURKEY
Faculty of Fisheries, Çanakkale Onsekiz Mart University, 17100, Çanakkale, TURKEY
Faculty of Fisheries, Akdeniz University, 07058, Antalya, TURKEY

Abstract

The present paper reports the abundance and biomass of Dasyatis centroura (Mitchill, 1815), D. marmorata (Steindachner, 1892), D. pastinaca (Linnaeus, 1758), and D. tortonesei Capapé, 1975 at various depth levels and seasons in the Gulf of Antalya, and total length-weight (TL-W), disc length–weight (DL-W) and disc width weight (DW-W) relationship of 391 individuals of D. pastinaca, 21 individuals of D. marmorata, and five individuals of D. centroura, caught in trawling surveys. A total of 116 hauls were carried out, between August 2009 and April 2010 seasonally in the Gulf of Antalya, at six stations and six depth levels (25, 50, 75, 100, 150, 200 m) using a commercial bottom trawl. Dasyatis species were sampled from 65 hauls and the frequency of occurrence was 56.03% for D. pastinaca, 11.21% for D. marmorata, 2.59% for D. centroura and 0.86% for D. tortonesei. The overall mean abundance and biomass was 55.32 ind./km² and 107.53 kg/km² for D. pastinaca; 2.54 ind./km² and 2.56 kg/km² for D. marmorata, 0.50 ind./km² and 25.97 kg/km² for D. centroura and 0.25 ind./km² and 1.34 kg/km² for D. tortonesei. The general TL-W, DL-W and DW-W were described by the equations: W = 0.023*TL^2.76 ; W = 0.0999*DL^2.74 and W = 0.037*DW^2.97 for D. pastinaca; W = 0.002*TL^3.23; W = 0.034*DL^3.02 and W = 0.0045*DW^3.59 for D. marmorata; and W = 0.00001*TL^4.04; W = 1.481*DL^2.16 and W= 0.141*DW^2.59 for D.centroura.

Keywords: Stingray, Dasyatis, seasonal trawl survey, Antalya, Mediterranean Sea

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