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CNAA / Theses / 2006 / May /

Beetlesof the superfamily Curculionoidea (Insecta, Coleoptera) from the Republic of Moldova, their biodiversity and importance


Author: Аnton Poiras
Degree:doctor habilitat of biology
Speciality: 03.00.09 - Entomology
Year:2006
Scientific consultants: Ion Toderaş
doctor habilitat, professor, Institute of Zoology
Boris Vereşceaghin
doctor habilitat, professor, Institute of Zoology
Institution:

Status

The thesis was presented on the 4 May, 2006
Approved by NCAA on the 29 June, 2006

Abstract

Adobe PDF document – 0.54 Mb / in romanian
Adobe PDF document – 0.63 Mb / in russian

Thesis

CZU 595.768.23:591.5(478)

Adobe PDF document 2.31 Mb / in russian
290 pages

Keywords

beetles, weevils, fauna, trophical spectrum, zoogeography, rare species, pests, entomophagous, biodiversity and importance

Summary

The work deals with the study of beetles of the superfamily Curculionoidea from the Republic of Moldova, their biodiversity, particularities of distribution in biogeographical interference zone, estimation of faunistic complexes, investigation of biological and ecological particularities of the economically important species and role of weevils in nature and human activities.

As a result of researches carried out during last twenty years it has been found that weevils fauna of the Republic of Moldova consists of 683 species from the following families: Nemonychidae, Anthribidae, Urodontidae, Attelabidae, Rhynchitidae, Apionidae, Nanophyidae, Brachyceridae, Dryophthoridae, Curculionidae, Scolytidae and Platypodidae. Among the revealed taxons 172 species, 20 genera and one family are new for the fauna of investigated region.

For the first time the ecologo-faunistic review of regional weevils is presented, the characteristics of species diversity and trophical spectrum are given, the vital forms are studied, and the soil habitant and hygrophilous complexes are revealed.

The analysis of weevils distribution in biogeographical interference zone (Republic of Moldova) is made. A new data for a number of weevil species are obtained and groups of species conform of area types are divided. It has been established that approximately for 16% of species this territory is only an edge of their distribution. The weevil faunistic complexes of region have been investigated and their characteristic and differentiation is determined.

For the first time the rare and extinct weevil species of investigated region are studied and the rarity categories are indicated. The role of economically important weevil species is characterized, actual and potential plant pests are revealed and their harm potential is estimated. For the first time the polytomic keys for the species identification of some economically important weevil groups are elaborated. Biological particularities of the most dangerous and poorly studied plant pests are investigated, the entomophagous complexes are revealed and their role in the reducing of pest species number is determined. In collaboration with american scientists the introduction of three entomophagous from the Republic of Moldova and West Siberia into the USA (Wisconsin and North Dakota states) for biological control of european weevil Sitona cylindricollis Fahr. has been carried out.

The importance of the regional weevils in nature and human economic activities is characterized. For the first time this insect group, regarding of biodiversity, the functioning of sustainable ecosystems and rational conservation of natural resources, is examined. Practical recommendations for the utilization of the date obtained are given.