caa a22 4500 445296070 CHVBK 20180317142542.0 cr unu---uuuuu 170323e20100401xx s 000 0 eng 10.1134/S0032945210030070 doi (NATIONALLICENCE)springer-10.1134/S0032945210030070 Behavioral differentiation of underyearlings of the Black Sea salmon Salmo trutta labrax [Elektronische Daten] Rheoreaction in the year preceding smoltification [D. Pavlov, V. Kostin, V. Ponomareva] Hatchery rearing underyearlings of the Black Sea salmon Salmo trutta labrax at the age of five-six months (nine-ten months before the beginning of smoltification) divide into two spatial groups—bottom group and pelagic group. This is caused by lack of territory (bottom area): the minority of fish are bottom-dwelling—such fish are territorial, they extrude the majority of individuals to the water column. It is determined experimentally that the bottom-dwelling fish belonging to the bottom group, in comparison with the fish of pelagic group, are characterized by higher critical flow velocities and lower locomotor activity in the rheogradient. Part of individuals with the static type of rheoreaction among them is higher. The fish from the pelagic group do not have such resource as individual territory. This fact modifies the probability of manifestation of resident and migrant behavior after starvation (during ten days). The individuals from the pelagic group demonstrate the behavior characteristic of future migrants (downstream movement) to a higher degree. The individuals from the bottom group, in comparison with pelagic fish, demonstrate, to a great degree, behavior typical for future residents (upstream movement). Pleiades Publishing, Ltd., 2010 the Black Sea salmon nationallicence rheoreaction nationallicence underyearlings nationallicence differentiation nationallicence smolts nationallicence parr nationallicence groups nationallicence Pavlov D. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut Kostin V. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut Ponomareva V. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut Journal of Ichthyology SP MAIK Nauka/Interperiodica 50/3(2010-04-01), 270-280 0032-9452 50:3<270 2010 50 11489 https://doi.org/10.1134/S0032945210030070 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0032945210030070 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pavlov D. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut NATIONALLICENCE 700 1- Kostin V. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut NATIONALLICENCE 700 1- Ponomareva V. Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, 119071, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Ichthyology SP MAIK Nauka/Interperiodica 50/3(2010-04-01), 270-280 0032-9452 50:3<270 2010 50 11489 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer