Naslov
The role of blood meal in the life of hematophagous horse flies (Diptera: Tabanidae)

Autori
Krčmar, Stjepan ; Marić, Svjetlana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Periodicum biologorum / Banfić, H. i suradnici - Zagreb : Hrvatsko prirodoslovno društvo, 2007

Skup
5th Croatian Congress of Pharmacology and 2nd Congress of Croatian Physiological Society

Mjesto i datum
Osijek, Hrvatska, 19.09.2007. - 22.09.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Diptera; Tabanidae; blood meal

Sažetak
Females of most horse flies species require a blood meal to complete egg development, because many species play an important role in spreading diseases of livestock and other animals. Also, some species are medically important to humans. Mainly, females of horse flies can lay eggs only after taking a blood meal. However, this is not always true. During 1960's the autogeny in horse flies of the genus Chrysops was established for the first time. After this report many research works have been performed on development cycles of Nearctic and Palaearctic species of horse flies. Several authors have found that many species occur autogenously in the first gonotrophic cycle throughout the world. In our research on the material collected from 1995 we have tried to determine whether one from the most abundant species Tabanus bromius L., 1758 and Tabanus sudeticus Zeller, 1842 in Eastern Croatia is autogeneous or anautogeneous. Analysis was performed on the ovarioles in the ovaries of 25 females of the species T.bromius and T.sudeticus. The follicles of the ovarioles of both species were mostly in stage I and II of the maturation, proving that the blood meal is essential for the egg maturation. Based on these results, we can conclude that the T.bromius and T.sudeticus are anautogeneous species in the studied area. The anautogeneous species presumably have some food reserves from the larval stage deposited in terminal oocytes, which do not suffice and mainly require a blood meal for egg maturation. Unfavorable climatic conditions such as low air temperature during spring months (June 1995) also prolong the pupal stage, which causes the consumption of the nutritive substances necessary for the development of the egg follicles. Thus, climatic conditions are the reason for appearance of anautogeneous species of horse flies in the first gonotrophic cycle.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Temeljne medicinske znanosti

POVEZANOST RADA