R. R. Borisov

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The cannibalistic behavior during all life history stages of the red king crab Paralithodes camtschaticus (Tilesius, 1815) raised under laboratory conditions was studied. All feeding stages were found to be cannibalistic. The major factors affecting the level of cannibalism were identified, and methods were proposed to reduce cannibalism intensity under(More)
150 Salinity and its fluctuations are major factors hav ing an effect on reproduction and development of hydrobionts in marine, coastal, and estuarine habitats (Anger, 2003). The red king crab is the most valuable crab species, with the bulk of its commercial catches coming from the North Pacific and, since the late 20th century, also from the North(More)
The effects of illuminance and the location of substrate relative to the water and bottom surfaces on the settlement process in red king crab glaucothoe was studied for the first time. Studies were conducted in the laboratory under natural illumination conditions; propylene fibers were used as a substrate. During the first half of the stage, glaucothoe swam(More)
The feeding dynamics of the larvae (zoea III, IV) and juveniles (stages 1–3) of the red king crab Paralithodes camtschaticus was studied. The duration of the zoea III and IV stages of the molting cycle was determined; the premolting stage was found to be the longest stage (about 60%). It was determined that apolysis and formation of new morphological(More)
In the giant freshwater prawn Macrobrachium rosenbergii (De Man), lecithotrofic feeding was discovered at the zoea I stage, and facultative lecithotrofic feeding was found at the zoea II stage. Cases of the completion of the first two stages without feeding were detected. However, a delay in feeding at the zoea II stage caused the inhibition of the growth(More)
Setae on the mouthparts of juvenile and adult red king crabs, Paralithodes camtschaticus (Tilesius, 1815), were studied. A total of seven types of setae have been differentiated; their distribution over the mouthparts was determined. It was established that setules and denticles on the surface of setae show a tendency to shorten and/or disappear as the body(More)
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