IKBFU's Vestnik

2011 Issue №07

The influence of environmental factors on the main parameters of woodcock (Scolopax rusticola L.) roding in the Kaliningrad region

Abstract

This article analyses the 2009—2010 data on woodcock roding. The authors assess the impact of meteorological conditions, light level, food availability, and other factors on the duration and intensity of woodcock roding in the Kaliningrad region. A direct correlation was established between the duration of daylight hours and the basic parameters of woodcock roding. Other
environmental factors may also affect woodcock roding.

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The comparative characteristics of Blackbird nest materials from natural and anthropogenic landscapes of the Kaliningrad region

Abstract

This paper offers a comparative characteristic of the blackbird nest materials of natural (n = 35) and antropogenic (n = 35) landscapes of the Kaliningrad region. The study did not reveal any considerable differences in the nest material composition in natural and antropogenic habitats. Most significant differences were identified in nest carcass materials. They are more diverse in
urban habitats; most frequent materials are phloem, bark, wood, grass shoots, flower buds, fruits, and antropogenic materials. The share of antropogenic materials on urban territories is 8,9 times higher than that in woodlands (t = 4,59, p < 0,001). The composition of nest lining is not that diverse. In woodlands, it consists predominantly of twigs and mosses.

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Some features of Corncrake's ecology in the conditions of modern agriculture

Abstract

This paper considers the dynamics of acoustical activity and the impact of hay harvesting and cattle grazing on the nesting of Corncrake Crex crex on three plots in the Ryazan, Vladimir, and Novgorod regions. Peak acoustic activity is achieved in June. The survival of nests and broods of up to 5-day old nestlings depends on the time span of hay harvesting (from 3 up to 68 %).
In total, from 48 to 88 % of nests and broods survived annually with the exception of 1999 on hay meadows. The survival rate of nests in pastures reached 86—91 %.

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The preadaptive abilities of birds to inhabit urban environments

Abstract

Anthropogenic environment, affecting various aspects of birds’ lives, triggers adaptive reactions to changeable conditions. These reactions develop on the basis of preadaptations that create prerequisites for new adaptations. The species that have adaptive abilities can adjust to urban environments. Anthropogenic landscapes are mainly inhabited by species with considerable
ecological flexibility, which ensures adaptations to new and changing conditions. Birds preserve their adaptive potential and, under certain conditions, are able to demonstrate latent adaptive effect.

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The history of bird studies in the Upper Kama area (the Komi-Permyak district and adjacent territory)

Abstract

There are few faunistic works on the region under consideration. Most sources offer scraps of information on individual groups of animals dating back to the end of the 19th — mid-20th century. E. Hoffman and L. P. Sabaneev's expedition reports are one of the first accessible sources. Valuable data are available in publications by F. A. Teplouhov, S. A. Reztsov, N. D. Mitrofanov,
P. V. Plessky, S. L. Ushkov, A. I. Dushin, P. G. Yefremov, А. Н. Formozov and S. A. Kuklin, Ye. М.Vorontsov, G. N. Simkin, S. P. Chashchin, M. I. Yeremchenko. The targeted exploration of the Upper Kama area began at the end of the 20th century.

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New data on the chironomid (Diptera: Chironomidae) fauna in the water bodies of the Kaliningrad region

Abstract

The authors analyse the chironomid fauna of four water bodies in city of Kaliningrad: Lakes Penkovoe, Pond Isakovsky, Pond Shkolny and the Karasevka pond system. The article describes the species diversity, quantity characteristics, and seasonal dynamics of chronomid population and gives an assessment of water quality on the basis of the species diversity data obtained.

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An analysis of exisitng research on the entomofauna of the Kaliningrad region

Abstract

This article estimates the number of insect species on the territory of the Kaliningrad region by order. The authors estimate the number of species at 9—13,1 thousand. The article addresses the development of regional entomofauna and entomology studies. The current level of research on biodiversity in the region is considered as insufficient.

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The endocrine function organization in flatworms

Abstract

This article focuses on the endocrine function in flatworms. It is implemented with the help of two groups of hormones. Several centres of neurosecretory cell localisation were discovered in the nervous system of flatworms. The hormonal signal is transmitted with the help of adenylate cyclase system, which is peculiar to vertebrates. Endogenous steroids – sex steroids and glycocorticoids
— were detected in some flatworm species. These data suggest that flatworms have an endocrine system, whose structural organization is similar to that of vertebrates and higher invertebrates.

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