Decreased levels of the invasive ctenophore Mnemiopsis in the Marmara Sea in 2001

2004-01-01
İşinibilir Okyar, Melek
Tarkan, Ahmet N
Kıdeyş, Ahmet Erkan
Mnemiopsis leidyi, an endemic ctenophore of the western Atlantic, was first reported in the Marmara Sea in summer 1992, at an average abundance of 27 ind. m−3. We investigated its abundance and distribution together with that of the mesozooplankton (most species are prey organisms of M. leidyi) at eight stations during August 2001, in order to evaluate recent population developments with regard to the impact of its predator, Beroe cf ovata. The abundance of M. leidyi was found to be quite low (range 0.5–8.8 ind. m−3, average 1.62 ind. m−3) compared to 1992. B. cf ovata was, although at very low abundance (0.1–1.1 ind. m−3), only present at stations where M. leidyi occurred. The zooplankton abundance was higher during our investigation than in previous years, which should at least partly be due to a decreased predation impact by M. leidyi.

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Decreased levels of the invasive ctenophore Mnemiopsis in the Marmara Sea in 2001
İŞİNİBİLİR OKYAR, Melek; Tarkan, AN; Kıdeyş, Ahmet Erkan (2004-01-01)
Mnemiopsis leidyi, an endemic ctenophore of the western Atlantic, was first reported in the Marmara Sea in summer 1992, at an average abundance of 27 ind. m(-3). We investigated its abundance and distribution together with that of the mesozooplankton (most species are prey organisms of M. leidyi) at eight stations during August 2001, in order to evaluate recent population developments with regard to the impact of its predator, Beroe cf ovata. The abundance of M. leidyi was found to be quite low (range 0.5-8...
Effect of temperature on clearance rate daily ration and digestiontime of Mnemiopsis leidyi from the southern Caspian Sea
M,, Rowshantabari; Finenko, Ga; Kıdeyş, Ahmet Erkan; Kiabi, B. (University of Guilan, 2012-06-01)
The effect of temperature on the main feeding parameters of Mnemiopsis leidyi from the southern Caspian Sea was studied in 2002. The clearance rates and daily rations were estimated from laboratory experiments in a wide range of temperatures from 12 to 27 ?C for M. leidyi of 12?17 mm in length. Clearance rate values changed from 52.5 to 107.3 ml ind-1 h-1. The coefficient Q10 in temperature 12 - 20 ?C was higher than that in 20 - 27 ?C (3.81 and 1.91, respectively). The specific daily ration changed from 1....
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Results of investigation of copepod fauna in the western Black Sea are obtained in May-June 2001. 49 taxa have been found including 33 taxa that are not of the Black Sea origin. The problem of intensifi cation of process of copepod fauna Mediterranization in the Black Sea basin is discussed.
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Citation Formats
M. İşinibilir Okyar, A. N. Tarkan, and A. E. Kıdeyş, Decreased levels of the invasive ctenophore Mnemiopsis in the Marmara Sea in 2001. 2004, p. 165.