Where and when animals forage depends on the spatio-temporal distribution catchability of their prey. In dynamic environments, can repeatedly target areas that provide predictable availability prey or may search for ephemeral conditions high availability. However, how foraging behaviour is initiated in response to static versus environmental difficult study, since both data sources are often la...

Bird nest selection in forests can be influenced by the composition of key structural elements and resources. This has important consequences terms species population dynamics since it determine reproduction success. Here, we assessed Common raven nest-site reproductive success, how these might determined foraging behavior habitat structure. A previously documented breeding that exerts high pre...

Changes to sampling gears or vessels can influence the catchability detectability of fish, leading biased trends in abundance. Despite widespread use underwater video cameras index fish abundance and rapid advances technology, few studies have focused on calibrating data from different used surveys. We describe a side-by-side calibration study ( N = 143 paired videos) undertaken 2014 account fo...

Abstract Participatory decision tools enable stakeholders to reconcile conflicting natural resources management objectives. Fisheries targeting highly productive species can have profound impacts on co-occurring bycatch with low fecundity and other life history traits that make them vulnerable anthropogenic sources of mortality. This study developed a tool for integrated data-limited data-rich ...

Abstract Context Habitat loss and alteration affect wildlife populations worldwide. Bush encroachment alters landscapes threatens arid semi-arid grasslands, but its effects on predator–prey relationships carnivore community ecology are not well understood. Predation strategies of large predators, for example high-speed pursuits versus ambush from short distances, likely to be affected different...

Detectability, the probability of encountering a species at a sampling site, is often overlooked in fisheries research despite its potential to obscure inferences on habitat use and lead to biased estimates of abundance. We used occupancy models to explore factors affecting detectability and occupancy ( ), the probability that a species inhabits a site, for three fishes frequently captured in C...

Harvest may have myriad effects on target species, including a change in population size structure. To assess whether shifts occurred among managed coastal species of shark (superorder Selachimorpha), we examined the structure 12 caught during nearly five-decade-long fishery-independent survey conducted Onslow Bay, North Carolina, using standardized longline gear. We evaluated trends mean fork ...

Abstract Blue marlin (Makaira nigricans) and sailfish (Istiophorus platypterus) are ecologically important predators valuable species throughout the world’s recreational, commercial, subsistence fisheries. Comparing multi-species vertical habitat use can inform ecological uncertainties such as inter-species competition, well relative vulnerabilities to fishing activities. In this study, we iden...