REPRODUCTION CHARACTERISTICS AND GROWTH RATE OF CTENOPHORE BEROE OVATA LARVAE IN THE CASPIAN AND BLACK SEA WATERS
Keywords:
Beroe ovata, hatching success, survival, growth rateAbstract
Reproduction characteristics, survival and growth rate of ctenophore Beroe ovata larvae were studied in the Caspian and the Black Sea water at salinity about 12 and 18 ‰ accordingly. Both larvae placed in the Caspian water with and without acclimation showed the lower values of reproduction indices as compared with those in the Black Sea water. Nevertheless, adult Beroe ovata could reproduce in the Caspian water even placed there without any salinity acclimation and some share of eggs (about 10 – 15 % of total number of the laid eggs) developed into larvae. In the Black Sea water the hatching success was much higher and was equal to 83 – 87 %. Beroe larvae grew in the Caspian Sea water though their growth rate was rather slow and survival was not as high as in the Black Sea.
References
Dumont H. J. Ecocide in the Caspian // Nature. – 1995. – 377. – P. 673 – 674.
Finenko G. A., Anninsky B. E, Abolmasova G. I. et al. Functional role of the ctenophore invaders Mnemiopsis leidyi Agassiz and Beroe ovata Mayer in inshore planktonic communities / Shulman G. E., Öztürk B., Kideys A., Finenko G. A., Bat L. Trophic relationships and food supply of heterotrophic animals in the pelagic ecosystem of the Black Sea. – Istanbul, Turkey: Commission on the protection of the Black Sea against pollution, 2009. – P. 161 – 221.
Finenko G. A., Anninsky B. E, Romanova Z. A. et al. Chemical composition, respiration and feeding rates of the new alien ctenophore, Beroe ovata, in the Black Sea // Hydrobiologia. – 2001. – 451. – P. 177 – 186.
Finenko G. A., Kideys A. E., Anninsky B. E. et al. Invasive ctenophore Mnemiopsis leidyi in the Caspian Sea: feeding, respiration, reproduction and impact on zooplankton community // Mar. Ecol. Prog. Ser. – 2006. – 314. – P. 171 – 185.
Finenko G. A., Romanova Z. A., Abolmasova G. I. et al. Population dynamics, ingestion, growth and reproduction rates of the invader Beroe ovata and its impact on plankton community in Sevastopol Bay, the Black Sea // J. Plankton Res. – 2003. – 25. – P. − 539 – 549.
Opportunistic settlers and the problem of the ctenophore Mnemiopsis leidyi invasion in the Black Sea. – London: GESAMP Rep. and Studies, IMO, 1997. – N 58 – 84 pp.
Ivanov P .I., Kamakim A. M., Ushivtzev V. B. et al. Invasion of Caspian Sea by the comb jellyfish Mnemiopsis leidyi (Ctenophora) // Biol. Invasions. – 2000. – 2. – P. 255 – 258.
Kideys A. E. Recent dramatic changes in the Black Sea ecosystem: The reason for the sharp decline in Turkish anchovy fisheries // J. Mar. Sys. – 1994. – 5. – P. 171 – 181.
Kideys A. E., Jafarov F. M. Kuliyev Z., Zarbalieva T. Monitoring Mnemiopsis in the Caspian waters of Azerbaijan // A report prepared for the Caspian Environment Programme. Baku, Azerbaijan. – Final Report, August 2001. – 46 p.
Kideys A. E., Finenko G. A., Anninsky B. E. et al. Physiological characteristics of the ctenophore Beroe ovata in Caspian Sea water // Mar. Ecol. Prog. Ser. – 2004. – 266. – P. 111 – 121.
Kideys A., Finenko G., Arashkevich A. et al. Propagation experiments with Beroe ovata in the Caspian Sea water in autumn 2002 // A report prepared for Caspian Environment Program, Baku, Azerbaijan. – 2002. – Final Report, October 2002. http://www.caspianenvironment.org/mnemiopsis/mnemmenu9.htm.
Kideys A. E., Moghim M. Distribution of the alien ctenophore Mnemiopsis leidyi in the Caspian Sea in August 2001 // Mar. Biol. – 2003. – 142. – P. 163 – 171.
Kovalev A. V., Gubanova A. D., Kideys A. E. et al. Long-term changes in the biomass and composition of fodder zooplankton in coastal regions of the Black Sea during the period 1957 – 1996 / Ivanov, L.I. & Oguz T. Ecosystem Modeling as a Management Tool for the Black Sea. – Klüwer Acad. Publ. Dordrecht/Boston/London, 1998. – P. 209 – 219.
Shiganova T. A., Kamakin A. M., Zhukova O. P. et al. The invader into the Caspian Sea ctenophore Mnemiopsis and its initial effect on the pelagic ecosystem // Oceanology. 2001. – 41. – P. 517 – 524 (in Russian).
Shiganova T. A., Sapoznikov V. V., Musaeva E. I. et al. Factors that determine pattern of distribution and abundance Mnemiopsis leidyi in the Northern Caspian // Oceanology. - 2003. – 43. – P. 716 – 733 (in Russian).
Svetlichny L. S., Abolmasova G. I., Hubareva E. S. et al. Respiration rates of Beroe ovata in the Black Sea // Mar. Biol. – 2004. – 145. – P. 585 ─ 593.
Vinogradov M. E., Sapoznikov V., Shushkina E. A. The Black Sea ecosystem. – M.: Nauka, 1992. – 112 p. (in Russian).
