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共检索到555条 ,权限内显示50条;
Data from: Implications of survey effort on estimating demographic parameters of a long-lived marine top predator
- 负责人：
- 关键词：
- Tursiops aduncus
- DOI：
- doi:10.5061/dryad.6381477
- 摘要：
- on the statistical power to estimate demographic parameters is limited. Here, we investigate implications of survey effort on estimating abundance, home range sizes and reproducti
Data from: Hide and seek in vegetation: time-to-detection is an efficient design for estimating detectability and occurrence
- 负责人：
- DOI：
- doi:10.5061/dryad.v2c17
- 摘要：
- , plant height and two measures of abundance (cover and frequency). 3.Estimates of detectability and occupancy under both models were very similar. Rare species
Data from: Territory size decreases minimally with increasing food abundance in stream salmonids: implications for population regulation
- 负责人：
- Grant, James
- 关键词：
- contiguous territories density limitation population density stream salmonids territoriality elastic disc model
- DOI：
- doi:10.5061/dryad.37hh4
- 摘要：
- ve estimates of territory size over a broad range of food abundance are relatively rare because of the difficulty of measuring food abundance in the wild.
Data from: Techniques for estimating the size of low density gopher tortoise populations
- 负责人：
- DOI：
- doi:10.5061/dryad.786r6
- 摘要：
- population estimates are required to aid management and guide policy needed to recover the species. Line transect distance sampling has been adopted as the preferred
Data from: Techniques for estimating the size of low density gopher tortoise populations
- 负责人：
- Stober, Jonathan M.
- 关键词：
- abundance burrows cluster size analysis line transect distance sampling Gopher tortoise population density pseudo-circuit systematic sampling
- DOI：
- doi:10.5061/dryad.786r6.1
- 摘要：
- population estimates are required to aid management and guide policy needed to recover the species. Line transect distance sampling has been adopted as the preferred
Data from: Estimating transient populations of unmarked individuals at a migratory stopover site using generalized N-mixture models
- 负责人：
- DOI：
- doi:10.5061/dryad.bc1k2b3
- 摘要：
- t incorporates temporal trends in immigration and estimates daily abundance of a staging unmarked migratory population. Correct estimation of population sizes
Data from: Integrated population modeling provides the first empirical estimates of vital rates and abundance for polar bears in the Chukchi Sea
- 负责人：
- DOI：
- doi:10.5061/dryad.692jb15
- 摘要：
- densities west of Alaska were 0.0030 bears/km2 (95% CRI = 0.0016–0.0060), similar to 1980s-era density estimates although methodological differences
Data from: A spatially explicit hierarchical model to characterize population viability
- 负责人：
- Campbell, Steven
- 关键词：
- capture-recapture CAR model demography multi-state model population viability analysis recruitment Sonoran desert tortoise spatial autoregressive model survival spatial variation
- DOI：
- doi:10.5061/dryad.v0q5035
- 摘要：
- change (λ), then use estimates of λ (and its uncertainty) to forecast changes in local abundance and produce spatially explicit estimates of viability (probability
Data from: Model-based inference for estimating shifts in species distribution, area occupied and centre of gravity
- 负责人：
- Thorson, James
- DOI：
- doi:10.5061/dryad.r1s8g
- 摘要：
- ), population boundaries and area occupied. Conventional estimators, such as the abundance-weighted average (AWA) estimator for COG, confound range shifts
Data from: Lianas abundance is positively related with the avian acoustic community in tropical dry forests
- 负责人：
- DOI：
- doi:10.5061/dryad.1m90s
- 摘要：
- abundance on birds in dry forests. Here we evaluate the influence of liana abundance on the avian acoustic community in the dry forests of Costa Rica
