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    Distribution and population dynamics of Aurelia aurita (Cnidaria; Scyphozoa) in the southern Black Sea
    (North-Western Journal of Zoology, 2009) Bat, Levent; Satılmış, Hasan Hüseyin; Birinci-Özdemir, Zekiye; Şahin, Fatih; Üstün, Funda
    The distribution, abundance, biomass and population dynamics of the jelly fish, Aurelia aurita were determined during 2001-2003 in the southern Black Sea (Sinop Region). Aurelia aurita was collected by hand net from inshore and with vertical and with horizontal net hauls from offshore. Volume (wet weight) to length (disc diameter) relation was calculated to be WW= 0.1988 L 2.4406 (R= 0.9525, N= 1162) during October 2001-December 2003 in handling samples; WW= 0.2773 L 2.1282 (R= 0.9351, N= 351) during May 2002-December 2003 in vertical and horizontal net ha uls, respectively. In March 200 3, maximal abundance and biomass of Aurelia aurita were 20 ind.m -2 and 2130 ml.m -2 at station A, respectively. In horizontal tows, maximum abundance and biomass was found in November 2003 (10.63 ind.100m -3 ) at station A and in April 2003 (291 ml.100m -3 ) at station C. Abundance and biomass of A. aurita was detected to increase in autumn and from early to late spring. The highest biomass of A. aurita was observed in March, July and December of 2002 and March and April of 2003. Biomass and abundance was not found to be significantly different between stations A, B and C at Sinop region in the southern Black Sea (p>0.05). Difference of the size and weight relationships was not found among different mont hs in 2002 and 2003 in shallow and hauls sampling (p>0.05). In survey, the difference in diameter groups was found significant (p<0.05) among months of 2002 and 2003.