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
Show full item record
193
views
0
downloads
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.
Mnemiopsis leidyi, Beroe cf ovata, Marmara Sea, Population dynamics, Predation
https://hdl.handle.net/11511/79042
Graduate School of Marine Sciences, Book / Book chapter

Suggestions

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....
Summer ichthyoplankton, food supply of fish larvae and impact of invasive ctenophores on the nutrition of fish larvae in the Black Sea during 2000 and 2001
Gordina, AD; Zagorodnyaya, JA; Kıdeyş, Ahmet Erkan; Bat, L; Satilmis, HH (2005-06-01)
Qualitative composition and abundance of both ichdryoplankton and small forms of zooplankton were evaluated by field studies in the northern (the Crimea near Sevastopol) and Southern (Sinop region and TEEZ) Black Sea during the summers 2000 and 2001. A tendency of increasing the species richness, abundance of fish eggs and larvae as well as zooplankton (which is the food for fish larvae) was observed over a period of Mnemiopsis leidyi and Beroe ovata co-existence. The eggs and larvae of the Mediterranean mi...
Study of Copepod Species from the Western Black Seain the Cruise r/v Knorr during May June 2001
Selifonova, Janet P; Shmeleva, Alexandra A; Kıdeyş, Ahmet Erkan (Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2008-01-01)
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.
Vertical distribution of marine cyanobacteria Synechococcus spp. in the Black, Marmara, Aegean, and eastern Mediterranean seas
Uysal, Zahit (2006-01-01)
The vertical distributions of the unicellular cyanobacteria Synechococcus were studied in several highly contrasting seas: the Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea. Cell abundances varied significantly on both vertical and horizontal scales in all physically and spatially discrete water masses. Epifluorescence microscope cell counts from all seas clearly showed that majority of the population remains suspended in the surface-mixed layer and decreases gradually towards the base of the...
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.
METU IIS - Integrated Information Service open@metu.edu.tr