9/27/2023 0 Comments Mississippi kite behaviorIn der vorliegenden Studie wurde auf mehreren räumlichen Ebenen die Ressourcenwahl einer hochmobilen Greifvogelart, der Mississippiweihe ( Ictinia mississippiensis) mittels eines Distance sampling Ansatzes untersucht. Sie zu erlangen kann für Arten schwierig sein, die hochmobil sind oder große Home Ranges haben. Der Naturschutz benötigt zur Entwicklung effektiver Managementstrategien für prioritäre Arten aber räumlich genaue Informationen zur Habitatnutzung. Ebenso können Arten Affinitäten für ganz spezifische Bereiche innerhalb ihrer weiteren Verbreitung zeigen. Wild lebende Tiere nutzen und wählen Habitate nach verschiedenen Maßstäben, was gelegentlich zu gegensätzlichen Interpretationen der Bedeutung von verschiedenen Habitateigenschaften, die auf unterschiedlichen Skalen analysiert wurden, führt. Skalenabhängige Ressourcenwahl und Raumnutzung von Mississippiweihen ( Ictinia mississippiensis ) in einem heterogenen Buschökosystem. Avoidance of riparian forest is atypical for Mississippi Kite, but might be explained in this system as avoidance of areas occupied by nest predators of kites, especially Great Horned Owl ( Bubo virginianus). Both observed density and predicted occurrence suggested riparian avoidance. Broad-scale selection also favored uplands farther away from riparian forest cover. At a broader scale (~ 200 ha), kites avoided oil pads but selected grass cover. At a fine scale (~ 13 ha), kites selected small, upland forest patches but avoided grass cover and riparian forest. Resource selection in Mississippi Kite was driven by both fine and broad-scale vegetation characteristics. Dominant cover in these landscapes is a mix of grasses, forbs, and expansive stands of a dwarf oak tree ( Quercus havardii) generally < 1 m in height. We compared land cover of kite detection points to randomly located points at fine and broad spatial scales in a portion of the species’ breeding range in the southern Great Plains, USA. In this study, we used a distance sampling approach to estimate multi-scale resource selection for a highly mobile raptor, Mississippi Kite ( Ictinia mississippiensis), based on data collected from line transect surveys combined with plotting tools in a geographic information system. This information can be difficult to obtain for species that are highly mobile or occupy large home ranges. Conservationists need spatially explicit information on habitat use to develop effective management strategies for priority species. Species can also exhibit affinities that are unique to portions within their larger distribution. Wildlife use and select habitat at multiple scales, sometimes leading to conflicting interpretations of the importance of various habitat features analyzed at different scales.
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