The paper describes the general ichthyopathological state and new mycosis and oncological diseases of parenchyme organs in anchovy kilka (liver, spleen, testicles).

It is investigated biofouling buoys within Makhachkala seaport. Seasonal dynamics of development of community, structure species and trophic structure is revealed. It is established vertical zonality in distribution of fouling.

The article presents the results of the study of oribatid mites of coastal ecosystems and of islands of the north-west part of the Caspian Sea: species composition, distribution data and analysis of life forms of oribatid mites.

The results of study of the spiders fauna of Daghestan on 2011 were summed up at most in the work. The annotated lost of species was cited according to the world catalogue of Norman Platnik [1]. By the present time the composition of species of studied district includes 311 species, from which 59 species are cited as new for Daghestan, and 2 species (Drassodes arc-hibensis Ponomarev & Alieva, 2008, Drassodes dagestanus Ponomarev & Alieva, 2008) are described as new for science. The indicated specimen earlier as sp. are identified to species – the species Nurscia albosignata Simon, 1874, earlier was identified as Nurscia sp. [8], the species Clubiona alpicola Kulczynski, 1881, earlier was identified as Clubiona sp.[8], and the species Clubiona brevipes Blackwall, 1841, earlier was identified as Clubiona sp.[8]. The mistaken definition is corrected – the species Pirata hurkai Buchar, 1966, earlier identified as Pirata knorri (Scopoli, 1763).

The article discusses the soiling of the shelf waters by different pollutants (oil-pollution, heavy metals, pesticides).

The processes of free radical oxidation are shown to be activated at the expense of antioxidants depletion if tympanism of young sterlet is developing. At the same time the level of phospholipids decreases, the content of mono- and diacylglycerols increases considerably, and the processes of lipolysis are activated with simultaneous rising of the lisophosphatidylcholine and sphingomyelin levels and decreasing in phosphatidylserine.

During 2000-2007 studying of specific structure macrozoobenthos and its quantitative distribution on islands of Apsheron and Baku archipelagoes of Caspian Sea has been spent. The got results have been compared with the results of analyses carried out in the same area of the sea between 1967-1986 years, and as a result, increasing in quantity and bio weight of bottom fauna has been observed. Number of macroorganisms has increased in 20 times, and a biomass - in 15 times. The oil maintenance in waters for the first 20 years has decreased with in 1,2-2 times, for the next 20 years quantity of oil has decreased in limits from 10 to 300 times. Considering the above-stated, it is possible to come to conclusion about absence now appreciable negative consequences for sea ecosystem and bioresources of Caspian Sea from working out of oil and gas deposits.

The article examines the features of the seasonal activity of dragonflies within different altitudinal belts of the Central Caucasus. We have identified the duration of flight activity of adult dragonflies and the dependence of distributional pattern of this group on temperature and air humidity. We have also made the analysis of the distribution of species on phenological groups.

They Are Analysed material of the examination influence of the people surplus moistening and flooding landscape Stavropoliskiy edge.

The analysis of the materials by a complex hygienic estimation of the environment of the Republic of Dagestan showed that: – as a whole in the Republic of Dagestan the adverse potential of the atmospheric self-cleaning and the level of the atmospheric air pollution with a dust, sulphur dioxide, carbon monoxide and nitrogen dioxide is observed. 

By means of use of morphological, histochemical, histoenzymatic methods there has been studied features of acetate gastric ulcer morphogenesis of 40 rats under chronic enteral organophosphorus pesticide (FOC) – chlorophos injection. For the first time structural and metabolic basics of distortion of mucous membrane regeneration in ulcer area in continuous enteral toxic factor exposure and dose dependence of acute gastric ulcer chronicity are identified.

Seed storage experiment was carried out for 28 alpine species in Northwest Caucasus. We tested seed germiability for fresh collected seeds, winter storage on soil surface and soil burial treatment (1, 2, 3 and 5 years). Most of the species showed higher germiability after one winter storage on soil surface. Germiability of burial seeds decreased from one to five year sto-rage. Only two species (Leontodon hispidus, Senecio aurantiacus) germinated after 5 years burial in soils.

Reservoirs of Seaside lowland of Dagestan have huge value for life of republic owing to high fisheconomycal and recreational value. Intensive pollution of reservoirs of Seaside lowland of Dagestan has led to that once developed on these water objects the fisheconomy is now in decline.

The environmental monitoring of air in the Republic of Dagestan has been made, priority pollutants and critical areas of human impacts have been identified.

The presented article considers the questions physico-mechanical characteristic soil recent alluvial sediments Volga-Akhtuba floodland in connection with designing and construction different industrial object, and first of all,oil-and-gas of the infrastructure.

The material of the examination of the natural settling the population are Analysed on territory Stavropoliskom edge and with provision for climatic conditions.

In work are considered questions to transformations, migration and accumulations material, energy in development of ground external, rather then internal relationships, to reduction of adequacy and timeliness of the answer (the reactions) of ground on external influences, to reduction soil buffer arid ground. It is installed that change hidromorphic conditions on arid zone, either as any sharp change to intensities of the influence on ground climatic and antropogenic factor, brings about sharp to reinforcement деградации soil. This is confirmed by analysis of the different layers pole structured dark alkaline soil at rein-forcement aridization, as well as in model experience at estimation of toughness relationship water by method derivatograph and composition humus join (the method IKS) at modeling of the change degree hidromorphic ground.

In the article results of comparative estimation of soil biological activity indicators on the basis of studying intensity of vegetative organic and cellulose decomposition and also oxygen consumption in zone of shrubby thickets and open steppe of West Caspian are given. Rates of vegetative organic decomposition in soils of experience sites have made 5,23 and 5,67 mg·g-1·24 h-1 and didn't differ on sites. Intensity of cellulose decomposition in open site was above and has made 6,02 mg·g-1·24 h-1 against 4,16 mg·g-1·24 h-1 in soil of site with shrubby thickets. The estimation of intensity soil oxygen consumption hasn't shown an essential difference on sites.