![]() ![]() Variation in Baiting Intensity Among CO2- Baited Traps Used to Collect Hematophagous Arthropods Bait-station indices should not be conducted near research sites that employ similar bait when both produce a tangible reward for the animals. Bears may have become habituated to the bait on trap lines and incorporated it as a regular food source. We found that population trends inferred from bait-station visits in areas that also were trapped with bait were biased high and that bias increased over time. We modeled probability of bait stations being visited by bears on trapped and untrapped lines to estimate the effect baited trapping had on visitation rates. Because the same baits were used for both trapping and bait station lines, we hypothesized that visitation rates of bears to bait stations established in proximity to baited trap lines would differ from rates at bait stations that were not associated with baited trap lines. Baited bear trapping also took place in the sanctuary during those years, and some trap lines coincided with bait-station lines. In the Pisgah Bear Sanctuary, bait-station surveys were conducted in most years from 1983 to 2000 to follow trends over time in the black bear (Ursus americanus) population. Indices of relative abundance allow managers and researchers to examine changes in population size over time or compare relative population sizes in different areas. The Silphidae and Histeridae were more abundant in the maple forest, whereas the Hydrophilidae and Ptilidae were more abundant in the fir forest.Įffects of trapping with bait on bait-station indices to black bear abundanceīrongo, L.L. Strong differences in species assemblages were also observed between the southern maple and fir forest sites. For the beetles caught in the meat- baited traps (majority of captures), decreases in abundance and species richness were observed from south to north along the fir forest transect, with evidence of decreasing specific diversity as measured by the Shannon index of diversity. All Histeridae, Hydrophilidae, Scarabaeidae, and Silphidae were identified to species to examine specific diversity variation among sites. Meat- baited pitfall traps caught nearly 15 times as many beetles as dung- baited traps. A total of 8,511 beetles were caught and identified to family level, 95.7% of which belonged to families with known coprophilous or necrophagous behavior. Beetle abundance was estimated using a sampling design comprising replicated pitfall traps baited with red deer meat or dung in each site. We studied selected assemblages of coprophilous and necrophagous beetles in Quebec along a 115-km north-south transect in three balsam fir (Abies balsamea (L.) Miller) forest sites and in a fourth forest site dominated by sugar maple (Acer saccharum Marshall), close to the southern fir site. The presence and abundance of beetles exploiting such resources are influenced by various ecological factors including climate and forest cover vegetation. Vertebrate dung and carrion are rich and strongly attractive resources for numerous beetles that are often closely linked to them. This study provides an inventory of the arboreal and ground ant fauna contributing to the knowledge and conservation of Amazonian ant fauna.Selected beetle assemblages captured in pitfall traps baited with deer dung or meat in balsam fir and sugar maple forests of central Quebec.īrousseau, Pierre-Marc Cloutier, Conrad Hébert, Christian Also, the composition of the ant assemblages was different between these habitats (with only 20% occurring in both) indicating that complementary methods which include arboreal and terrestrial ants are indicated for efficient inventory. As expected, the abundance and richness of ants was higher on the ground than in the understory. Two hundred and three (203) species distributed among 23 genera and eight subfamilies were sampled, wherein 34 species had not yet been reported in the literature for Mato Grosso State. Moreover, we compared the composition of the ground dwelling and vegetation foraging ants. This paper aimed to list the ant species collected both on the ground and in the vegetation of the Parque Estadual do Cristalino, an important protected site in the center of the southern Amazon. However, the majority of inventories have concentrated on ground-dwelling ant fauna disregarding arboreal fauna. Ants are ecologically dominant and have been used as valuable bio-indicators of environmental change or disturbance being used in monitoring inventories. ![]()
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