Naslov
Evaluation of the Dragonfly (Odonata) Number by Method of Minimum Squares

Autori
Bogdanović, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Limnological Reports. Vol.33. Proceedings / Horvatić, Janja - Osijek : Grafika Osijek, 2000, 507-514

Skup
33rd Conference of International Association for Danube Research

Mjesto i datum
Osijek, Hrvatska, 03.09.2000. - 09.09.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pond; season dynamics; dragonfly; biodiversitiy
(pond; season dynamics; dragonfly; biodiversity)

Sažetak
A quantitative and qualitative analysis of the dragonfly's fauna at the Miljačka Pond near the village of Nard was made in June, July, August and September of the year 1998. A total number of 1220 dragonflies were collected. They belonged to 9 species, 8 genuses, 6 families and 2 suborders of the order Odonata. The nine species present 13,23% of the total number of species in Croatia. The following methods were used: the method of collecting by a net, the method of taking photographs, and the method of strolling and observing. The species Sympetrum sanguineum had the greatest abundance at a single observation as well as the greatest frequency of encounter (qualitative structure). The number of species was stable from sunrise to sunset, and according to the quantitative structure, they were more abundant during the afternoon. Nine of the explored species of dragonflies at the Miljačka Pond were the result of diversity of microbiotops and their arrangement, in which different species find optimal conditions of living, and therefore the most agreeable habitat. In biologically optimal conditions it can be expected that the observed data are symetrically arranged in linear relation t=c and that they increase to the t=c point and decrease thereafter. Using the method of minimmum squares and by applying the function-model we have shown that the movements of the measured values in time (season dynamics) can be anticipated.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA