BACKGROUND More than 30 different lineages of amphibians, reptiles, birds, and
mammals have independently invaded oceans ecosystems. Prominent examples include …

Otters are highly charismatic and popular animals of very considerable concern to
conservationists worldwide. Written by the pre-eminent authority in the field, this book builds …

1. Longitudinal records of prey selection by 10 adult female sea otters on the Monterey
Peninsula, California, from 1983 to 1990 demonstrate extreme inter-individual variation in …

Dietary diversity often varies inversely with prey resource abundance. This pattern, although
typically measured at the population level, is usually assumed to also characterize the …

The conservation and management of sea otters has benefited from a dedicated research
effort over the past 60 years enabling this species to recover from a few thousand in the …

Detailed postmortem examination of southern sea otters (Enhydra lutris nereis) found along
the California (USA) coast has provided an exceptional opportunity to understand factors …

Large body size, carnivory, and endothermic costs lead to exceptionally high caloric
demands in many mammalian predators. The potential impact on prey resources may be …

Ecological surprises, substantial and unanticipated changes in the abundance of one or
more species that result from previously unsuspected processes, are a common outcome of …

Measurements of body size and mass are fundamental to pinniped population management
and research. Manual measurements tend to be accurate but are invasive and logistically …

This study reports an experimental confirmation of the terminal investment hypothesis, a
longstanding theoretical idea that animals should increase their reproductive effort as they …