Respiration rates of Beroe ovata in the Black Sea

Svetlichny, LS
Abolmasova, G
Hubareva, ES
Finenko, GA
Kıdeyş, Ahmet Erkan
Metabolic rates of the ctenophore Beroe ovata within the length range from 0.4 mm (newly hatched larvae) to 60 mm were investigated. At 20degreesC the respiration rates (Q, mug O-2 ind.(-1) h(-1)) of individuals with wet weights (W, mg) less than or greater than 100 mg changed according to the equations Q=0.093W(0.62) and Q=0.016W(0.99), respectively. The weight-specific respiration rate of the juvenile ctenophores with wet body weights of 0.021-100 mg diminished approximately 20-fold (from 0.35 to 0.017 mug O-2 mg(-1) h(-1), respectively), but did not change within the range from 100 to 30,000 mg. The difference in the slope of the regression lines seems to be attributable to the ontogenetic changes in B. ovata metabolism. For the tested temperature range of 10-28degreesC, the mean Q(10) coefficient was equal to 2.17+/-0.5. The basal metabolism of B. ovata narcotised by chloral hydrate was 4.5+/-0.9 times lower than total metabolism. Such a metabolic range is considered to be characteristic of aquatic invertebrates with high levels of locomotory activity.


Composition of eggs and larvae of fish and macrogelatinious zooplankton in Sinop Region (The Central Black Sea) during 2002
Satilmis, Hasan Huseyin; Bat, Levent; Ozdemir, Zekiye Birinci; Ustun, Funda; Sahin, Fatih; Kıdeyş, Ahmet Erkan; Erdem, Yakup (2006-01-01)
This study was carried out in order to determine abundance and distribution of macrogelatinous organisms (Aurelia aurita, Pleurobranchia pileus, Mnemiopsis leidyi ve Beroe ovata) with respect to fish egg and larvae in Sinop region in 2002. Three stations were selected this region and plankton tows were made both verticallly and horizontally. In study the ctenophores M. leidyi between January and September, and B. ovata between August and December period were appeared. The cnidarian Aurelia aurita and the ct...
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Ifrij, IH; Ögel, Zümrüt Begüm (Springer Science and Business Media LLC, 2002-07-01)
Extracellular proteases produced by Scytalidium thermophilum, grown on microcrystalline cellulose, were most active at pH 6.5-8 and 37-45 degreesC when incubated for 60 min. Highest protease activity was at day 3 where endoglucanase activity was low. Protease activity measurements with and without the protease inhibitors, p-chloromercuribenzoate, PMSF, antipain, E-64, EDTA and pepstatin A, suggest production of thiol-containing serine protease and serine proteases. Endoglucanase and Avicel-adsorbable endogl...
Detailed chromosome measurements and karyotype asymmetry of some Vicia (Fabaceae) taxa from Turkey
MARTİN, ESRA; Yildiz, Hatice Kubra; KAHRAMAN, AHMET; Binzat, Okan Kaan; EROĞLU, HALİL ERHAN (2018-01-01)
This study examined the detailed chromosome measurements and karyotype asymmetries of seven taxa in the genus Vicia. The taxa are V. articulata, V. cassubica, V. villosa subsp. villosa in sect. Cracca, V. noeana var. noeana, V. sativa subsp. sativa, V. peregrina in sect. Vicia and V. caesarea in sect. Ervum. V. cassubica, V. noeana var. noeana, V. sativa subsp. sativa, V. caesarea have 2n = 12 chromosomes. V. articulata, V. villosa subsp. villosa, V. peregrina have 2n = 14 chromosomes in somatic cells. Tota...
Chemical composition, respiration and feeding rates of the new alien ctenophore, Beroe ovata, in the Black Sea
Finenko, GA; Anninsky, BE; Romanova, ZA; Abolmasova, GI; Kıdeyş, Ahmet Erkan (2001-05-01)
Maximum daily rations of the ctenophore Beroe ovata Brugiere and predatory impacts on the Mnemiopsis leidyi A. Agassiz population were estimated via digestion time, prey biomass and predator and prey density in Sevastopol Bay and adjacent water regions. Digestion times ranged from 0.5 to 5.2 h and depended on the prey/predator weight ratio. Overall, the mean daily ration was 45% of B. ovata wet weight. Preliminary conclusions are given on the B. ovata population as an effective control of the M. leidyi popu...
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The effect of salt stress (100 mM and 200 mM NaCl) on antioxidant responses in shoots and roots of 14-day-old lentil (Lens culinaris M.) seedlings was investigated. Salt stress caused a significant decrease in length, wet-dry weight and an increase in proline content of both shoot and root tissues. In leaf tissues, high salinity treatment resulted in a 4.4 fold increase in H2O2 content which was accompanied by a significant level of lipid peroxidation and an increase in electrolyte leakage. Root tissues wer...
Citation Formats
L. Svetlichny, G. Abolmasova, E. Hubareva, G. Finenko, L. BAT, and A. E. Kıdeyş, “Respiration rates of Beroe ovata in the Black Sea,” MARINE BIOLOGY, pp. 585–593, 2004, Accessed: 00, 2020. [Online]. Available: