Okolelov A. Yu., Shubin A.О.
Dynamics of distribution of 8 wader species
The process of bounding of Passeriformes families is often subjective and arbitrary. Particularly, at the present time, neither the volume of Sylvidae family nor its position in the system of Passeriformes is considered uniformly. In this connection, in taxonomy at the higher level than the species one, the use of a comparative ethological approach becomes topical. At immediate task of the approach is the explicit formulation of ethological diagnosis of a family. This diagnosis may be considered as a description of some behavioral archetype, characterizing one or another taxon of the given range. The paper shows a considerable uniformity of main visual and acoustic sugnaling in species of the genera
Special features of the gut and peritrophic envelope (PE) structure in the cockroach
Ushakova О.О., Saranchova O.L.
The low salinity resistance of competent pelagic larvae in some invertebrate species (Polychaeta, Gastropoda, Echinodermata, and Bryozoa) from the White Sea was studied in laboratory experiments. The flucluations of salinity within a range of 8 to 12%o affect to a great extent the survivorship and matamorphosis of the invertebrate larvae. Two groups of species, whose resistance to salinity differed according to the results obtained and the calculated lethal dose (LD
Kravtsova L.S., Karabanov E.B., Kamaltynov R.M., Mekhanikova I.V., Sitnikova T. Ya., Rozhkova N.A., Slugina Z.V., Izhboldina L.A., Weinberg I.V., Akinshina T.V., Krivonogov S.K., Shcherbakov D. Yu.
The species composition and distribution of macrozoobenthos in the shallow water zone (shoal, depth of 0-20 m) in southern Lake Baikal (Bol'shie Kotly Bay) were investigated. 244 taxa of macroinvertebrates were recorded. Four bottom complexes, differing in the fauna similarity and distribution of vegetation, were distinguished on the basis of physical-geographical features of the area studied. These complexes are as follows: beach, shallow water terrace, underwater slope, and shallow water canyon. The shoal of Lake Baikal is characterized by the high local diversity of the bottom population due to a complex set of environmental factors.
Teslenko V.A., Zhil'tsova L.A.
Previously unknown nymphs of the genus
The population structure and vertical distribution of
The seasonal dynamics of reproduction and reproductive parameters in
Tyurin S.A., Drozdov A.L.
The sperm ultrastucture of the five sea cucumber species belonging to four families and two orders was studied (Dendrochirotida order, Cucumariidae fam. -
Springtail groups dwelling difficulty decomposed fractions of forest litterfall (bark, branches, and cones) and wood differ in the number, species composition, and structure of dominance. The most specific is the collembolan polulation in wood, represented by wood and soil complexes. Some peculiarities of the collembolan communities and trends in their successions are revealed.
Gil'denkov M. Yu.
Keys to identifying 53 species and subspecies of
Paklina N.V., van Orden C.
The investigations in September-October 1998 revealed that a significant part of the kiang