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Final Environmental Impact Statement: Salmon River Corridor, U.S. Forest Service
Final Environmental Impact Statement: Salmon River Corridor, U.S. Forest Service
Final Environmental Impact Statements (ID)
Documents the analysis conducted for the Salmon River Corridor. This corridor involves National Forest System lands within the Sawtooth National Forest. The analysis of the current condition of the Salmon River Corridor has found that existing conditions within the Corridor do not comply with the direction, standards and guidelines of the Sawtooth National Forest Land and Resource Management Plan or the intent of PL92-400 which established the Sawtooth National Recreation Area; The proposed action of this FEIS is to bring management of this corridor into compliance with the FLRMP.
Winter Activity Patterns Of American Martens (Martes Americana): Rejection Of The Hypothesis Of Thermal-Cost Minimization, Gary S. Drew, John A. Bissonette
Winter Activity Patterns Of American Martens (Martes Americana): Rejection Of The Hypothesis Of Thermal-Cost Minimization, Gary S. Drew, John A. Bissonette
Green Canyon Environmental Research Area, Logan Utah
Despite their temperate to subarctic geographic range, American martens (Martes americana) possess a thermally inefficient morphology. The lack of morphological adaptations for reducing thermal costs suggests that marten may use behavioral strategies to optimize thermal budgets. During the winters of 1989-1990 and 1990-1991, we radio-collared and monitored the diel activity of 7 martens. A log-linear model suggested that the presence or absence of light was the only factor associated with marten activity patterns (p < 0.001). A regression of the percentage of active fixes on ambient temperature failed to detect an association (b = -4.45, p = 0.084, n = 12). Contents of marten seats suggested that their activity was consistent with the prey-vulnerability hypothesis. While martens must balance multiple life requisites, their activity patterns suggest that they accept increased thermal costs in order to increase foraging efficiency. However, the nocturnal activity of martens during winter was also consistent with the hypothesis that they may be able to limit their own exposure to predation risk. The nocturnal habits of Newfoundland martens in the winter were consistent with the hypothesis of avoidance of predation risk.