Invasive mammalian carnivores contribute disproportionately to declines in global biodiversity. In California, nonnative red foxes (Vulpes vulpes) have significantly impacted endangered ground-nesting birds and native canids. These foxes derive primarily from captive-reared animals associated with the fur-farming industry. Over the past five decades, the cumulative area occupied by nonnative re...

-In 1995 we deployed 800 simulated nests equipped with nest mortality timers to assess temporal patterns of predation of duck nests in the Canadian prairies. Timers recorded 470 predation events (70% of 672 depredated nests). Predation was nonrandom throughout the day, with a peak occurring between 00:00 and 06:00. Coyote (Canis latrans) and red fox (Vulpes vulpes) depredated nests at similar t...

In a cross-sectional study (1992-1994) on wild and domestic carnivores infected with E. granulosus and E. multilocularis in plain and mountaineous areas of Ardabile province, 130 intestinal specimens of dogs, red fox(Vulpes vulpes), wolves (Canis bupus), jackals (Canis aureus), wild and domestic cats (Felis chaou) were collected and examined for Echinococcus species. The percentage of E. granul...

Vitamins A and E are known as nutrients involved in metabolic processes facilitating the adaptation of animals. The metabolism these vitamins is closely related to lipid metabolism, which has seasonal variations animals inhabiting northern latitudes. aim this study was investigate concentrations retinol (vitamin A) α-tocopherol E) cold season (October February) tissues Canidae species that have...