Microdistribution and structural-functionsl characteristics of some species of caddisflies in the Kedrovaya River (South Primorye, Russia)

 

Kocharina, S.

Academy of Sciences, Laboratory of Freshwater Hydrobiology, Vladivostok, Russia

 

 

Abstract

             

Microdistribution and structural-functional characteristics of some species of caddisflies in the Kedrovaya River (South Primorye, Russia). The present study deals with important aspects of biology and ecology of some species of caddisflies, inhabiting the Kedrovaya River. Quantitative samples were collected from April 1993 to July 1994.  Data on biodiversity, density and biomass  of caddisflies larvae on the section "riffle-pool" are given. The horisontal and vertical distribution for water stages of three species of net-spinning caddisflies Stenopsyche marmorata, Arctopsyche palpata and Hydropsyche orientalis in spring period was studied. The relationship between their distributional patterns and the abiotic factors, including depth, velocity current, temperature and character of substrata were elucidated.   Production, energy expenditure and energy balance for populations of net-spinning caddisflies were obtained.