| multiple data sources improve dna-based mark-recapture population estimates of grizzly bears. | a fundamental challenge to estimating population size with mark-recapture methods is heterogeneous capture probabilities and subsequent bias of population estimates. confronting this problem usually requires substantial sampling effort that can be difficult to achieve for some species, such as carnivores. we developed a methodology that uses two data sources to deal with heterogeneity and applied this to dna mark-recapture data from grizzly bears (ursus arctos). we improved population estimates ... | 2008 | 18488618 |
| sarcocystis caninum and sarcocystis svanai n. spp. (apicomplexa: sarcocystidae) associated with severe myositis and hepatitis in the domestic dog (canis familiaris). | there are several reports of sarcocystis sarcocysts in muscles of dogs, but these species have not been named. additionally, there are two reports of sarcocystis neurona in dogs. here, we propose two new names, sarcocystis caninum, and sarcocystis svanai for sarcocysts associated with clinical muscular sarcocystosis in four domestic dogs (canis familiaris), one each from montana and colorado in the usa, and two from british columbia, canada. only the sarcocyst stage was identified. most of the s ... | 2016 | 25256157 |
| bet-hedging applications for conservation. | one of the early tenets of conservation biology is that population viability is enhanced by maintaining multiple populations of a species. the strength of this tenet is justified by principles of bet-hedging. management strategies that reduce variance in population size will also reduce risk of extinction. asynchrony in population fluctuations in independent populations reduces variance in the aggregate of populations whereas environmental correlation among areas increases the risk that all popu ... | 2002 | 12177536 |
| trade-offs and efficiencies in optimal budget-constrained multispecies corridor networks. | conservation biologists recognize that a system of isolated protected areas will be necessary but insufficient to meet biodiversity objectives. current approaches to connecting core conservation areas through corridors consider optimal corridor placement based on a single optimization goal: commonly, maximizing the movement for a target species across a network of protected areas. we show that designing corridors for single species based on purely ecological criteria leads to extremely expensive ... | 2017 | 27677418 |