caa a22 4500 606228152 CHVBK 20210128101202.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10641-014-0287-y doi (NATIONALLICENCE)springer-10.1007/s10641-014-0287-y Divergent skull morphology between trophic separated lacustrine forms of Dolly Varden charr from Lake Kronotskoe, Kamchatka, Russia [Elektronische Daten] [E. Saltykova, G. Markevich, K. Kuzishchin] Trophic morphology divergence between two forms of Dolly Varden Salvelinus malma from Lake Kronotskoe (Kamchatka Peninsula, Russia): Salvelinus albus (omnivorous form) and Salvelinus schmidti (benthivorous form) was studied using the skull bone's qualitative and measurable attributes. The strongest morphological differences between these two charr forms were associated with the jaw bone structures (i.e. premaxilla, maxilla, angulo-articular and dentary bones). There was an abrupt shift in bone structures with increasing body length in both morphs. S. albus of body length less than 350mm had wider dentary, maxilla and angulo-articular bones than individuals of similar sized S. schmidti. In contrast, large (>350mm) individuals of S. albus had narrower bone structures than individuals of S. schmidti. This divergent pattern of the bone structures in the jaws is closely linked with their different trophic niches measured by the contence of stable isotope (δ 13C, δ 15N) values in the tissues. S. albus have a narrow, long jaw bones and a terminal mouth and occupy an omnivorous niche with clear ontogenetic niche-shifts (i.e. benthivore and piscivore) by increasing in size. In contrast, S. schmidti have short jaw bones and a low mouth; also S. schmidti is exclusively benthivores through their entire ontogeny. These trophic traits indicate clear divergence between two lacustrine forms, which occupy different trophic niches but, at the same time, are not completely reproductively isolated. Springer Science+Business Media Dordrecht, 2014 Salvelinus malma nationallicence Skull bone's morphology nationallicence Trophic specialization nationallicence Sympatric populations nationallicence Saltykova E. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut Markevich G. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut Kuzishchin K. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 559-570 0378-1909 98:2<559 2015 98 10641 https://doi.org/10.1007/s10641-014-0287-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0287-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saltykova E. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Markevich G. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Kuzishchin K. Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119991, Moscow, Russia aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/2(2015-02-01), 559-570 0378-1909 98:2<559 2015 98 10641