Zobrazeno 1 - 10
of 44
pro vyhledávání: '"David G. Hankin"'
Publikováno v:
California Agriculture, Vol 58, Iss 4, Pp 186-189 (2004)
Dungeness crab support a valuable commercial fishery in California, yet in recent decades the fishery has intensified significantly, with most crab landed during the first 6 weeks of the 7-month season. This study of fishermen's operating costs and
Externí odkaz:
https://doaj.org/article/0bacb4962cd3475bba67a55299c9abcd
Publikováno v:
Transactions of the American Fisheries Society. 146:1245-1261
Steelhead Oncorhynchus mykiss exhibit substantial life history variation throughout their range, but the “half-pounder” life history is limited to several rivers in northern California and southern Oregon. Half-pounders first return to freshwater
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f40cdf1408f953da11fbbf7cc31feae3
https://doi.org/10.1080/00028487.2017.1356372
https://doi.org/10.1080/00028487.2017.1356372
Publikováno v:
Sampling Theory
Many ecological research and resource monitoring programs must deliver good estimates of both current resource status and long-term trend. The simple two-occasion context frames the trade-offs in design of surveys to achieve these objectives. If the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e2a21d8cc14edb768a0922463efa62b
https://doi.org/10.1093/oso/9780198815792.003.0013
https://doi.org/10.1093/oso/9780198815792.003.0013
Publikováno v:
Sampling Theory ISBN: 0198815794
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e8f46020590e22f79951039de640b7a
https://doi.org/10.1093/oso/9780198815792.005.0001
https://doi.org/10.1093/oso/9780198815792.005.0001
Publikováno v:
Sampling Theory
This chapter presents a formal quantitative treatment of material covered conceptually in Chapter 2, all with respect to equal probability with replacement (SWR) and without replacement selection simple random sampling, (SRS) of samples of size n fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa857f0a1d6dba8c39e8d09373099487
https://doi.org/10.1093/oso/9780198815792.003.0003
https://doi.org/10.1093/oso/9780198815792.003.0003
Attention is restricted to two-phase or double sampling. A large first-phase sample is used to generate a very good estimate of the mean or total of an auxiliary variable, x, which is relatively cheap to measure. Then, a second-phase sample is select
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f18a21a4663ea985206e3b22f193dd
https://doi.org/10.1093/oso/9780198815792.003.0010
https://doi.org/10.1093/oso/9780198815792.003.0010
The abundance of rare species of plants and animals may often prove difficult to estimate due to the isolated patchy distribution of individuals. Adaptive sampling may prove more effective than other sampling strategies for such species. In adaptive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acd3541f9eb170d4a383e5aec5531e10
https://doi.org/10.1093/oso/9780198815792.003.0011
https://doi.org/10.1093/oso/9780198815792.003.0011
Publikováno v:
Sampling Theory
In many ecological and natural resource settings, there may be a high degree of spatial structure or pattern to the distribution of target variable values across the landscape. For example, the number of trees per hectare killed by a bark beetle infe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19c2780a62a70b42059ef5e32cb76858
https://doi.org/10.1093/oso/9780198815792.003.0012
https://doi.org/10.1093/oso/9780198815792.003.0012
In many contexts it is difficult or impossible to select a simple random sample. For example, the number of units in the finite population, N, may not be known in advance, or it may not be feasible to assign labels to all units in the population and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f7ee7e00fd167b7fbb2e983f5fc7bd3
https://doi.org/10.1093/oso/9780198815792.003.0004
https://doi.org/10.1093/oso/9780198815792.003.0004
Publikováno v:
Sampling Theory
Inexpensive and/or readily available auxiliary variable, x, values may often be available at little or no cost. If these variables are highly correlated with the target variable, y, then use of ratio or regression estimators may greatly reduce sampli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bde5ee60955feed7f271c8c6f85721b3
https://doi.org/10.1093/oso/9780198815792.003.0007
https://doi.org/10.1093/oso/9780198815792.003.0007