Salinity management for the eight experimental populations
was as follows: "Stock" dilutions (151 L) of ambient seawater with fresh water to obtain desired salinities (1, 2, 3, and 4) were made daily and allowed to sit for 24 h with aeration in the holding tank (temperature equilibration) before daily water changes.
For each experimental population
, the model was run for 45 years with values of annual F ranging from 0.
109) In practice, the FWS always designates an experimental population
as nonessential, affording them the least protection under the ESA.
Wolves in Idaho were managed as a non-essential, experimental population
Only one population (E25) showed an important change in the effective number of alleles among the experimental populations
We then test these predictions in the field by manipulating the magnitude of initial size variation in experimental populations
of the generalist grasshopper, Melanoplus femurrubrum.
We further conducted preliminary association study in an experimental population
Park staff monitor two populations of the cactus and are working to establish an experimental population
in Big Bend.
2) A small experimental population
was also established, temporarily, on the moon in 1968.
To establish an experimental population
under section 10(j), the population must be "wholly separate geographically" from any already existing wolves within the experimental area.
We examined this possibility by plotting the mean values for each of these traits (adjusted for female size variation) against the cumulative population density (the summed density of each experimental population
until the sample date; Fig.
They would bring in wolves from Canada, and these would be given the bureaucratic label of "Non-Essential Experimental Population
In an experimental population
, healthy individuals were mostly from resistant families and none became diseased in the 3rd year (Alexander and Antonovics, 1995).
The wolves of Yellowstone are an experimental population
introduced from Canadian stock, and their numbers have increased greatly in the past ten years.
The Farm Bureau argued that it was illegal for USFWS to mix an experimental population
of wolves with a native population, which could not be shot under any circumstances, because the two were afforded different protections under the law.