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Abstract

The changes of the biophysical characteristics of light-emission in ontogenesis of ctenophore Beroe ovata Mayer, 1912 -recent introducer to the Black Sea has been researched. It is established, that bioluminescent amplitude of larvae was eight times higher, and energy of light-emission seven times more, than similar parameters of the bioluminescence in eggs of ctenophores. Amplitude and energy of light-emission of quite recently caught ctenophore (in control) were some orders more than similar parameters in ctenophores after spawning.The maximum bioluminescent amplitude values were observed in the group of ctenophores with eggs-laying. It was registered a significant increase of light-emission characteristics of ctenophores with increasing body. Substantiated conclusion, that distinctions in the bioluminescence parameters of ctenophores in ontogenesis can be caused by ontogenetic features of their biochemical structure and quantity involved in bioluminescent reaction photocytes.

A review of mechanically stimulated bioluminescence of marine plankton and its applications

“…Results showed the bioluminescence capacities of these organisms to be highly varied based on abiotic factors and intrinsic characteristics of the individual. Light emitted by M. leidyi and Beroe ovata, for example, can vary based on their diet (Mashukova and Tokarev, 2013), their developmental stage and size (Tokarev et al, 2012), the metabolism of the individual, environmental parameters such as temperature (Nikolaevich and Vladimirovna, 2016), and whether or not they are in the process of regeneration . It is not known if those parameters affect the flash kinetics of other phyla in the same manner, warranting further research.…”

“…A wide variety of methods have been used in controlled laboratory environments for applying shear in MSL measurements, including Couette flow, pipe flow, microfluidic constriction, microfluidic obstruction, Svet, orbital shaker, various stirring apparatuses, acoustic pressure, applying a vacuum, and using a needle probe. The Svet is a photometer system using water flow to stimulate bioluminescence within a cuvette, differing in sizes based on the organisms being tested (Tokarev et al, 2012;Nikolaevich and Vladimirovna, 2016). Light is collected via a photomultiplier tube (PMT) that sits 1 cm away from the cuvette (Mashukova et al, 2023).…”

“…Euphausia superba, the bioluminescent krill serving as the keystone species of Antarctic food webs with an estimated global biomass of 215 million tons (Cavan et al, 2019), has been found migrating toward the South Pole. Zooplankton body size, which often correlates to bioluminescence intensity (Biggley et al, 1969;Herring, 2007;Tokarev et al, 2012), has been found to decrease with increasing water temperature (Ratnarajah et al, 2023). This will most likely impact the FF-MSL of large bioluminescent organisms, e.g., scyphozoans, siphonophores, ctenophores, and planktonic annelids.…”

“…Thus, significant variation exists across a developmental gradient and can likely be found in other species of bioluminescent zooplankton that are not direct developers. For the invasive ctenophore Mnemiopsis leidyi, bioluminescence not only varies throughout its development, from 5.00×10 8 photons/s for eggs to 5.00×10 10 photons/s for adults (Tokarev et al, 2012), but also based on its diet and water column temperature (Mashukova and Tokarev, 2013;Nikolaevich and Vladimirovna, 2016).…”