Variability of Mnemiopsis leidyi A. Agassiz (Ctenophora: Lobata) bioluminescence in relation to regeneration

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Mashukova O. V., Tokarev Yu. N. Variability of Mnemiopsis leidyi A. Agassiz (Ctenophora: Lobata) bioluminescence in relation to regeneration. Marine Biological Journal, 2016, vol. 1, no. 1, pp. 36-42.

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Our previous works have been shown the light-emission of Mnemiopsis leidyi A. Agassiz, 1865 and Beroe ovata Mayer, 1912 is species-specific and variability of bioluminescence parameters (amplitude, energy and also light-emission duration) depending on temperature, food supply and other factors. Revealing of M. leidyi light-emission variability during their regeneration after impactof predaceous organism B. ovata was the aim of our investigations. Definition of ctenophores bioluminescence characteristics was carry out on the laboratory complex “Light”. The ctenophore bioluminescence was investigated by method  of mechanical and chemical stimulation. The ctenophores, which were seriously injured but preserved their statocyst intact, went on actively moving but the characteristics of their light-emission lessened to minimal – 17.08·108 quantum·s−1·cm2 and 1.37 s under chemical stimulation, and 14.85·108 quantum·s1·cm2 and 1.25 s under the mechanical impact, respectively. Having completed regeneration and restored the body weight to the initial, the ctenophores maximally increased light emission – to (332.33 ± 16.61·108) quantum·s1·cm−2 under the chemical stimulation and to (219.45 ± 10.97·108) quantum·s1·cm2 under the mechanical excitation. Assumptions of the factors having an impact on M. leidyi regeneration intensity and their luminescence variability of throughout this process are made. Consequently, the possibility of bioluminescence applying for species ecology specification is shown.


O. V. Mashukova

Yu. N. Tokarev


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