Camera trap data are biased when an animal passes through a camera’s field of view but is not recorded. Cameras that operate using passive infrared sensors rely on their ability to detect thermal energy from the surface of an object. Optimal camera deployment consequently depends on the relationship between a sensor array and an animal. Here, we describe a general, experimental approach to evaluate detection errors that arise...

Gambusia quadruncus n. sp., the llanos mosquitofish, is described from east‐central México. The region inhabited by the species represents a hotspot of diversity of Gambusia , and G. quadruncus sometimes coexists with at least three congeners. The species differs from its closest relative, Gambusia affinis , in several characteristics with plausible effects on reproductive isolation, e.g . body size, body and fin morphology, m...

We investigated the effect of the thalassinid mud shrimp Upogebia pugettensis on organic matter and nutrient cycling on Idaho Flat, an intertidal flat in the Yaquina River estuary, Oregon. Field studies were conducted to measure carbon and nitrogen remineralization rates and benthic fluxes relative to shrimp population density. Organic carbon remineralization rates estimated from incubations increased with burrow density. Simi...