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
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 population and on the dynamics and structure of the planktonic community as a whole.


Physiological characteristics of the ctenophore Beroe ovata in Caspian Sea water
Kıdeyş, Ahmet Erkan; Anninsky, BE; Shiganova, TA; Roohi, A; Tabari, MR; Youseffyan, M; Rostamian, MT; Rostami, H; Negarestan, H (2004-01-01)
Riparian countries of the Caspian Sea have been evaluating the pros and cons of the predatory ctenophore Beroe ovata as a control agent against the invasive ctenophore Mnemiopsis leidyi, which has enormous adverse impacts on the fishery resources as well as on the biodiversity in this once fertile sea. To assess the viability of B. ovata establishment in the Caspian Sea, the survival and some physiological characteristics (feeding, respiration, reproduction and growth) of the predatory ctenophore were studi...
Invasive ctenophore Mnemiopsis leidyi in the Caspian Sea: feeding, respiration, reproduction and predatory impact on the zooplankton community
Finenko, Galina A.; Kıdeyş, Ahmet Erkan; Anninsky, Boris E.; Shiganova, Tamara A.; Roohi, Abolghaseem; Tabari, Mojgan R.; Rostami, Hosseinali; Bagheri, Siamak (2006-01-01)
The impact of the invasive ctenophore Mnemiopsis leidyi on the zooplankton community of the Caspian Sea was quantified according to food consumption and other major physiological activities (i.e. respiration and reproduction), coupled with field data on population structure. The adverse effects of M. leidyi on the zooplankton community during the first years of the invasion were tremendous for the Caspian Sea compared to other regions affected by this ctenophore. The impact was highest in summer, due to hig...
Regional peculiarities of community-wide trophic cascades in strongly degraded Black Sea food web
Oguz, Temel; Salihoğlu, Barış; Moncheva, Snejana; Abaza, Valeria (2012-04-01)
The community-wide trophic cascade due to collapsed fish stocks and population outburst of invasive predators after the early 1990s resulted in different pelagic and benthic food web structures in the Black Sea. The northeastern region assumed their most simplified forms characterized by increasing mesozooplankton and polychaete biomass. The ecological degradation is more severe in the northwestern part, whereas the southern basin maintains an anchovy fishery under relatively weak gelatinous predation.
Length-weight relationships of 28 fish species caught from demersal trawl survey in the Middle Black Sea, Turkey
Dagtekin, Murat; Genc, Yasar; Kasapoglu, Nazli; Erik, Gokhan; Misir, Devrim Selim; Ilhan, Salih; Ok, Meltem; Altuntas, Cemil; ÖZSANDIKÇI, UĞUR; Buyukdeveci, Ferhat; Kaya, Tugba; Cebeci, Ayse; Saltan, Asiye Nur; Hasimoglu, Atila; Firidin, Sirin; Ozdemir, Muhammed Dogan (2022-01-01)
This study provides updated the length-weight relationships and Fulton's condition factor of 28 fish species belonging to 23 families from the Black Sea. Samples were collected along the depths between 0-100 meters by demersal trawl surveys conducted seasonally from May 2017 to September 2019. A total of 83,885 specimens were collected. The length-weight relationships and Fulton's condition factor, minimum, maximum and mean lengths, total weights, descriptive statistics, and growth type were provided for al...
Climatic warming and accompanying changes in the ecological regime of the Black Sea during 1990s
Oguz, T; Cokacar, T; Malanotte-Rizzoli, P; Ducklow, HW (2003-09-27)
[1] The Black Sea ecosystem is shown to experience abrupt shifts in its all trophic levels from primary producers to apex predators in 1995 - 1996. It arises as a manifestation of concurrent changes in its physical climate introduced by intensive warming of its surface waters as well as abrupt increases in the mean sea level and the net annual mean fresh water flux. The warming is evident in the annual-mean sea surface temperature ( SST) data by a continuous rise at a rate of similar to0.25 degreesC per yea...
Citation Formats
G. Finenko, B. Anninsky, Z. Romanova, G. Abolmasova, and A. E. Kıdeyş, “Chemical composition, respiration and feeding rates of the new alien ctenophore, Beroe ovata, in the Black Sea,” HYDROBIOLOGIA, pp. 177–186, 2001, Accessed: 00, 2020. [Online]. Available: