Search results for "reviirit"
showing 7 items of 7 documents
Fighting performance as a predictor of mating success in male black grouse
2010
As a consequence of certain conflicting evolutionary interests of males and females, the sexes have taken on different reproductive roles. In many species, where females invest more in the production of offspring, males compete for the opportunities to reproduce and females attempt to choose the highest quality males to sire their offspring. Males of different species signal their quality in a variety of ways, including physical cues such as color signals or exaggerated secondary sexual characters, behavioral signals and acquisition of a dominance status through aggression towards other males. In the lekking black grouse only a few males manage to copulate and active fighting is required fo…
Spatial Memory Drives Foraging Strategies of Wolves, but in Highly Individual Ways
2022
The ability of wild animals to navigate and survive in complex and dynamic environments depends on their ability to store relevant information and place it in a spatial context. Despite the centrality of spatial memory, and given our increasing ability to observe animal movements in the wild, it is perhaps surprising how difficult it is to demonstrate spatial memory empirically. We present a cognitive analysis of movements of several wolves (Canis lupus) in Finland during a summer period of intensive hunting and den-centered pup-rearing. We tracked several wolves in the field by visiting nearly all GPS locations outside the den, allowing us to identify the species, location and timing of ne…
Identifying territories using presence-only citizen science data : An application to the Finnish wolf population
2022
Citizens, community groups and local institutions participate in voluntary biological monitoring of population status and trends by providing species data e.g. for regulations and conservation. Sophisticated statistical methods are required to unlock the potential of such data in the assessment of wildlife populations. We develop a statistical modelling framework for identifying territories based on presence-only citizen science data. The framework can be used to jointly estimate the number of active animal territories and their locations in time. Our approach is based on a data generating model which consists of a dynamic submodel for the appearance/removal of territories and an observatio…
The extent and causes of interspecific reproductive interactions in damselflies
2015
The evolutionary ecology of space use and its conservation consequences
2007
López-Sepulcre tutki väitöskirjassaan ekologis-evolutiivisia vuorovaikutussilmukoita yksilön ominaisuuksien ja populaatiotason ilmiöiden välillä. Ekologis-evolutiivisen vuorovaikutussilmukan käsite kuvastaa ekologisen demografian ja evoluutiobiologian välistä riippuvuussuhdetta. Silmukassa yksilöiden perinnöllisesti ohjatut käyttäytymis- ja elinkiertopiirteet heijastuvat populaation dynamiikkaan. Populaation dynamiikan muuttuminen suosii tiettyjä genotyyppejä toisten kustannuksella.Reviiri- ja dispersaalikäyttäytyminen ovat López- Sepulcren keskeisimmät tutkimuskohteet. Väitöksen ensimmäisessä osassa López-Sepulcre havaitsi, että demografiset prosessit kohtelevat reviirin omistajia ja revii…