![]() Student’s T-test for two variables confirmed the highest activity of golden jackal during the night (73.Published. To analyze daily/night/twilight activity and circadian rhythm, photos/videos were sorted by date and time in to 3 categories: day, night and twilight (Figure 4). The largest number of individuals, 5 individuals on the same photo/video clip, was recorded in 0.30% of events. ![]() In 94.64% of all events, only one individual was recorded. Without distinguishing individuals from each other, altogether, 359 individuals were recorded. After the removal of the triplicates, 336 events of golden jackal photos or video clips were confirmed (Table 1). The golden jackal was recorded on 437 (8.8% from all photos with recorded animal or humans Figure 3) photos or video clips. This is probably due to land unavailability caused by floods which impacts the pattern of space use of animals.Īs part of this research, in the period from 2012 to 2015, five camera traps had been set and were afterwards periodically relocated to the places where the occurrence of golden jackals was expected. ![]() ![]() If compared to other areas in Croatia, the territorial density of the jackal packs estimated by the acoustic method in the area of NP Lonjsko Polje was slightly smaller. The minimum density of territorial packs per 10 km2 was calculated as a ratio of the number of packs and the total area of response of jackals and ranged from 0.65 to 0.75 packs per 10 km2. By the use of the Q GIS function “Dissolve” in the Geoprocessing tools the total effective area of the response of the packs was calculated and it ranged from 186.30 to 214.50 km2. For the pack number estimation Point Cluster and Heatmap analysis in Q GIS 3.4. Outside of this radius human ear is not able to hear the sound of golden jackals howling. For the calculation of the packs territory, around each recorded GPS location, the circle of 1.8 and 2 km radius was created. From each calling station a recorded group yip-howl was broadcasted, and the GPS locations where the jackal’s response was heard, were recorded. Using the acoustic (playback) method, we confirmed the existence of 14 territorial packs in Lonjsko polje NP (Figure 1). Small rodents, insects, birds and bird eggs, are highly represented in the diet of golden jackals.ĭuring the research period from 2012 to 2015, the minimum number and minimum density of golden jackal territorial packs were estimated in the area of Lonjsko polje NP by acoustic and camera trap methods. Except insects, which make a significant proportion of fauna of this area, and mammal species related to aquatic and terrestrial habitats, more than 70% of all bird species recorded in Croatia inhabit NP Lonjsko polje. Lonjsko Polje NP is located in the alluvial plain of the central Sava river basin, with mosaics of different habitats typical for flooded areas such as flooded forests, marshes, swamps, meadows and agricultural lands. Today, territorial packs in this area are widespread and confirmed. Only 15 years ago, the appearance of the golden jackal in the Lonjsko polje Nature Park (NP) was sporadic. The rapid dispersion of golden jackal, as well as the increase of population density, indicates a high degree of ability of this species to adjust to different habitat conditions. Golden jackal ( Canis aureus Linné, 1758) belongs to the family Canidae, which is characterized by opportunism and life in a pack. Šver, "Research of golden jackal ( Canis aureus) in the Nature park Lonjsko polje by acoustic and camera traps methods Research of golden jackal ( Canis aureus) in the Nature park Lonjsko polje by acoustic and camera traps methods Gužvica G, Petković M, Augustinović M, Šver L. 'Research of golden jackal ( Canis aureus) in the Nature park Lonjsko polje by acoustic and camera traps methods "Research of golden jackal ( Canis aureus) in the Nature park Lonjsko polje by acoustic and camera traps methods Gužvica, Goran, Monika Petković, Marko Augustinović i Lidija Šver. Gužvica, G., Petković, M., Augustinović, M.
0 Comments
Leave a Reply. |