Filters: Tags: Ecosystems (X) > Categories: Project (X) > partyWithName: Erik Osnas (X)
3 results (23ms)|
Filters
Date Range
Extensions Types Contacts
Categories Tag Types Tag Schemes |
From 1995 to 1999, a subset of nest plots were searched twice by field crews to estimate nest detection probability by mark-recapture methods. Over the five years, 30 plots were searched twice and over 2700 unique nests were found. From these data, nest detection probability is estimated using a Huggins-type mark recapture model where individual-level covariate effects of nest and observer attributes were estimated. These estimates are then used to predict nest detection rates in other years based on covariates of nests and observers. Nest detection rates are then applied to annual plot search to estimate nest populations for each species in the sampled area.
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
In 2019 a pilot study was conducted to determine the feasibility of using distance sampling to estimate density and population size of goose and eider nests on the Yukon-Kuskokwim Delta (YKD). Distance sampling (Buckland et al. 2001) is a common and well-understood method to estimate wildlife population size or density, especially for sparse and hard-to-detect populations. A main advantage of distance sampling is that it accounts for imperfect detection and gives precise estimates for a given level of effort relative to other methods. The objectives for the pilot project in 2019 was to (1) determine if distance sampling is feasible on the YKD, (2) determine what aspects of the field protocol need to be changed or...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
BIOLOGICAL CLASSIFICATION,
BIOLOGICAL CLASSIFICATION,
In 1957, Henry (Hank) Hansen and Jim King identified important habitat for molting geese in an area now referred to as the Teshekpuk Lake Special Area (TLSA) in northern Alaska. Located within the larger National Petroleum Reserve-Alaska (NPR-AK), the importance of this habitat was reaffirmed by the Secretary of Interior in 1977 with the designation of the TLSA. In 1976, the Waterfowl Department of U.S. Fish and Wildlife Service (USFWS) Migratory Bird Management-Alaska (MBM-AK) began conducting aerial goose surveys within an area of the TLSA that they designated as the Traditional Survey Area. These surveys continued through 1978, after which there was a three-year hiatus. Surveys began again in 1982 and continued...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ALPINE/TUNDRA,
ANIMALS/VERTEBRATES,
ARCTIC TUNDRA,
BIOLOGICAL CLASSIFICATION,
BIOLOGICAL RECORDS,
|
|
