RESUMEN
A modified trap for quantitative estimations of bloodsucking insects is described. It is shown, that this trap has a number of advantages. Technical description, recommendations on constructing and exploitation are provided.
Asunto(s)
Dípteros , Entomología/instrumentación , Animales , Bovinos/parasitología , Diseño de Equipo , Densidad de PoblaciónRESUMEN
Mechanisms of effect of some morphophysiological parameters of cattle (age, colour, weight, skin area, intensity of defensive movements) on the attacking and attaching activity of tabanid flies were studied. Investigations were carried out in the south of Pskov Province in small herds by the method of simultaneous recording of attacking and attaching tabanids on all animals of the herd. It was established that differences in the attaching activity of Haematopota, Tabanus and Hybomitra flies depend mainly on the parameters affecting the efficiency of their attacks and connected with the age of animals, intensity of defensive movements and the host's skin area. The former correlates with the age of cows negatively while the latter positively. Therefore, more tabanids attach themselves to old animals than to young ones. For Chysops flies the main factor determining their intensity of attachment is the intensity of attacking. When attacking the Chrysops flies show preference to animals of dark colour independent of their age. It is shown that the increase in the attacking intensity results in the decrease of its efficiency and therefore reduces the probability of attachment for each individual.
Asunto(s)
Enfermedades de los Bovinos/parasitología , Dípteros/fisiología , Infestaciones Ectoparasitarias/veterinaria , Envejecimiento , Animales , Conducta Animal , Superficie Corporal/veterinaria , Bovinos , Enfermedades de los Bovinos/etiología , Infestaciones Ectoparasitarias/etiología , Infestaciones Ectoparasitarias/parasitología , Conducta Alimentaria/fisiología , Femenino , Color del Cabello , Federación de Rusia , Especificidad de la EspecieRESUMEN
The specific composition and the nature of domination of bloodsucking mosquitoes from the Charskaya hollow were studied. The abundance dynamics of attacking females was registered by means of Berezantzev's bell. Data were obtained on the hatching sites of mosquitoes and peculiarities of seasonal adaptation of some species in connection with the availability of various landscapes with different microclimatic conditions.