Comparative characteristic of feeding of three species of cottoidei in the littoral of southern Baikal (Cape Berezovyi)

Structure features and structural transformations of the maxillary bones in the Baikal cottoid fish

“…The measurements show that the consistent elongation of the jaw and reduction of the mouth protrusion in the studied species is followed by an appropriate change in mouth shape and the ratio of its morphological structures (Taliev, 1955;Sideleva and Mekhanikova, 1990;Sideleva, 2003;Tolmacheva, 2008;2010). The power load, which changed during evolution, is the main factor that affects the morphogenesis of the bone tissue (Wolff, 1892).…”

“…Three species of the family Cottidae, Paracottus knerii, Leocottus kesslerii and Batrachocottus baicalensis (Taliev, 1955;Sideleva, 2003), inhabit the littoral zone (from the water edge up to the depths of 250-300 m). The study of dietary habits within this biotopical group revealed two main trends of trophic adaptation, allowing these species to coexist in a single biotope: zoophagy and zoophagy + ichthyophagy (Taliev, 1955;Sideleva and Mekhanikova, 1990;Sideleva, 2003;Dzyuba, 2004;Miyasaka et al, 2006;Tolmacheva, 2008). Each species formed its morphofunctional features in the structure of the anterior digestive system as a result of adaptation to a specific trophic behavior (Taliev, 1955;Yabe, 1985;Sideleva and Mekhanikova, 1990;Sideleva, 2003;Tolmacheva, 2010).…”

“…The study of dietary habits within this biotopical group revealed two main trends of trophic adaptation, allowing these species to coexist in a single biotope: zoophagy and zoophagy + ichthyophagy (Taliev, 1955;Sideleva and Mekhanikova, 1990;Sideleva, 2003;Dzyuba, 2004;Miyasaka et al, 2006;Tolmacheva, 2008). Each species formed its morphofunctional features in the structure of the anterior digestive system as a result of adaptation to a specific trophic behavior (Taliev, 1955;Yabe, 1985;Sideleva and Mekhanikova, 1990;Sideleva, 2003;Tolmacheva, 2010). As any change in the function and structure of the system is followed, above all, by certain changes in its separate parts, it is relevant to apply the detailed approach to study latent regularities of these structural transformations in the closely related species of fish.…”

On morphological and ecological evidence of adaptive differentiation among stony cliff littoral Baikal gastropods

“…As a rule, freshwater, shell-breaking molluscivores (such as crabs, crayfish, prawns and fishes) prefer thinner-shelled prey (Covich 2010). Gastropods account for only~6% of the food particles of grayling and three species of sculpins (Cottoidei) dwelling in the littoral of Berezovy Cape (one of the sampling sites); these fish mainly consume benthic amphipods (Maximova 2007;Tolmacheva 2008) as well as most of the Baikal endemic Cottoidei fishes (Sideleva and Mekhanikova 1990). Gastropods prevailed (84% of gut contents) in the diet of the cyprinid Rutilus rutilus during summer fattening in the inshore and wave-cut zones at Berezovy Cape (Maximova 2007).…”

Visualization and Testing of Motion Bone Fish Jaw Apparatus Using a Generalised Structural Module

“…6), что соответствует полученным ранее эмпирическим данным для этого вида Cottoidei, которые составляют в среднем 41-45 % длины неврокраниума [25]. Ранее было показано, что высота ротового отверстия является лимитирующим фактором при размерной избирательности жертв из потенциального диапазона [26,27]. Согласно полученным исследованиям параметры ротового аппарата определяются не только его линейными размерами, а также общей геометрической конструкцией висцерального отдела и взаимодействием его костных элементов.…”