AUTHORIZED INCIDENTAL TAKE. As a part of the CCAA, specific authorization of incidental take from covered activities described in this CCAA is provided in the EOS permit issued by the Service, if the spotted frog is listed. Authorization for incidental take under the EOS permit is limited to the covered lands described in Section III and covered activities described in Section IV of this CCAA. Authorized take associated with this CCAA would be up to 12 adult or juvenile frogs and up to 8,400 tadpoles over the 20-year term of the EOS permit as described above. Impacts of taking The Service estimates that the following total amount of “take” of Oregon spotted frogs in the form of mortality over the 20 year period of this CCAA will be 12 adult/juvenile spotted frogs and 8,400 tadpoles. Based on information gathered through mark-recapture and egg mass surveys since 2012, the population of frogs in the Old Mill District consists of approximately 100 breeding adults and 945 juveniles. Our estimated amount of take represents 1.1 percent (i.e., 12/1045) of the current adult/juvenile population of frogs in the vicinity of the Old Mill. Oregon spotted frogs occur throughout the Upper Deschutes River sub-basin. Population estimates conducted in 2012 indicated that there is a minimum breeding adult population of 3,530 frogs in the Upper Deschutes River sub-basin (USFWS 2013). A loss of up to 2 adults in one year due to vegetation work at the Casting Pond represents 2 percent of the estimated adult population at the Old Mill District and only 0.057 percent of the estimated adult population in the Upper Deschutes sub-basin. Authorizing this level of take will not adversely affect the population of frogs that occur in the vicinity of the Old Mill District because the majority of the population resides in the LSA xxxxx, which will be unaffected by management actions that result in take. The Service estimates that 50 egg masses are deposited by the Old Mill spotted frog population of 100 individuals. Assuming that that each egg mass is comprised of 600 eggs with an embryonic survival rate of 70 percent, there are approximately 21,000 tadpoles (30,000 x 0.7) following the breeding season. As stated above, we assume that 420 tadpoles could be stranded each year in bioswales. The loss of 420 tadpoles annually due to undetected breeding occurring in bioswales within the Old Mill District represents two percent of the current tadpole population. However, if breeding is detected in bioswales in the future,...
AUTHORIZED INCIDENTAL TAKE. Take of xxxxxx may occur incidental to engaging in covered activities on enrolled lands, even when these actions are performed in compliance with the CCAA conservation measures. Potential take includes, but is not limited to:
AUTHORIZED INCIDENTAL TAKE. As described above, the island marble butterfly is not currently known to be present in the vast majority of the area covered by the CCAA Emphasis Areas on San Xxxx Island and Xxxxx Island, with the exception being American Camp within San Xxxx Island National Historic Park. We anticipate, however, that island marble butterfly populations will be established naturally or purposefully in the CCAA Emphasis Areas during the term of the proposed Permit. Incidental take is therefore reasonably certain to occur, and for the purposes of this analysis, the WDFW and the USFWS are considering a reasonable but conservatively large area (i.e., CCAA Emphasis Areas) to be occupied at least once during the next 15 years. Take of island marble butterflies is expected to occur incidental to engaging in covered activities on enrolled lands, even when these actions are performed in compliance with the CCAA conservation measures. Incidental take that is reasonably likely to occur includes, but is not limited to: Spot-spray herbicide applications that will harm an unknown number of island marble butterflies (eggs and larvae) associated with up to 10 acres of established habitat strips and blocks. This area was calculated by assuming full enrollment within the CCAA Emphasis Areas (8,798 acres) and 50 square feet of created habitat per acre enrolled. Mowing and fence construction and maintenance that will harm an unknown number of island marble butterflies (mostly eggs and larvae) associated with up to 50 acres at the periphery of established habitat strips and blocks. This area was calculated by assuming a 10-foot buffer on either side of a 4-foot wide habitat strip. Such an area would be five times larger than the strip itself, so 10 acres multiplied by 5 equals 50 acres. Foot traffic that will harm an unknown number of island marble butterflies (mostly eggs and larvae) in up to 60 acres in and around established habitat strips and blocks. Road use and road maintenance that will harm an unknown number of island marble butterflies (all life stages) associated with driveways, agricultural roads, and main roads. Habitat maintenance and management, mowing, grazing, ranching, agriculture, herbicide use, recreation and recreation management, and foot traffic that will harm an unknown number of island marble butterflies (all life stages) associated with up to 8,798 acres of enrolled acres of open, primarily treeless landscape.
