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3 results for “Brownie model”
Data from: Accounting for tagging-to-harvest mortality in a Brownie tag-recovery model by incorporating radio-telemetry data
The Brownie tag-recovery model is useful for estimating harvest rates but assumes all tagged individuals survive to the first hunting season; otherwise, mortality between time of tagging and the hunting season will cause the Brownie estimator to be negatively biased. Alternatively, fitting animals with radio transmitters can be used to accurately estimate harvest rate but may be more costly. We developed a joint model to estimate harvest and annual survival rates that combines known-fate data from animals fitted with transmitters to estimate the probability of surviving the period from capture to the first hunting season, and data from reward-tagged animals in a Brownie tag-recovery model. We evaluated bias and precision of the joint estimator, and how to optimally allocate effort between animals fitted with radio transmitters and inexpensive ear tags or leg bands. Tagging-to-harvest survival rates from >20 individuals with radio transmitters combined with 50–100 reward tags resulted in an unbiased and precise estimator of harvest rates. In addition, the joint model can test whether transmitters affect an individual's probability of being harvested. We illustrate application of the model using data from wild turkey, Meleagris gallapavo, to estimate harvest rates, and data from white-tailed deer, Odocoileus virginianus, to evaluate whether the presence of a visible radio transmitter is related to the probability of a deer being harvested. The joint known-fate tag-recovery model eliminates the requirement to capture and mark animals immediately prior to the hunting season to obtain accurate and precise estimates of harvest rate. In addition, the joint model can assess whether marking animals with radio transmitters affects the individual's probability of being harvested, caused by hunter selectivity or changes in a marked animal's behavior.
Data from: Accounting for tagging-to-harvest mortality in a Brownie tag-recovery model by incorporating radio-telemetry data
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Brownie Camera - Six-20 Model D.
Ionad Oidhreachta Leitir Mealláin (Heritage Centre) A lot of interest was shown in cultural and heritage exhibitions held in recent years of the private collection of the local historian John Bhaba Jeaic Ó Confhaola. As a result the committee decided to find a permanent centre to exhibit the rich heritage of the area. The Brownie was a long-running popular series of simple and inexpensive cameras made by Eastman Kodak. The first production of this camera, from 1946 until 1953 was available with a plain matte enamel faceplate, a metal or plastic winding knob and a metal or plastic shutter release button. From 1953-57 the camera changed to a horizontally striped design faceplate, plastic winding knob, and a plastic shutter release button. In additon, 2-pin flash contacts and a triangular spring back catch were added. There is no admission charge, but a donation is welcome Source: Objaverse 1.0 / Sketchfab
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