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Showing 1 to 8 of 8 for “"mark-resight"”.
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Breeding success, prey use, and mark-resight estimation of burrowing owls nesting on black-tailed prairie dog towns: plague affects a non-susceptible raptor
… nest density, and breeding success, and used mark-resight methods for owl population estimation. Prairie dogs experience high mortality from plague, and their colonies are periodically extirpated by outbreaks. Plague does not make owls sick, but they may be affected as unmaintained burrows …
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Evaluation of Barriers to Black-Tailed Prairie Dog (Cynomys ludovicianus) Colony Expansion, Bad River Ranches, South Dakota
… two methods of prairie dog density estimation, mark-recapture and mark-resight. Our estimates of prairie dog density (25.60 – 36.43 prairie dogs per hectare [~ 10 – 15 per acre]) were within the range reported in published studies for the species using mark-recapture or mark-resight approaches. …
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Monarch Butterfly (Danaus plexippus) Tree Preference and Intersite Movement at California Overwintering Sites
… at three California overwintering sites using a mark-resight study design. We found that a large proportion of the monarchs at a site moved among (into and out of) monitored sites, both while the population size increased in October and November, and while the population appeared to exhibit an …
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Population Status and Trends of the Ringed Sawback (Graptemys oculifera) in The Pearl River Drainage of Mississippi and Louisiana
… Population density estimates produced by two mark-resight models (Schnabel and NOREMARK) varied, where estimates were highest in the main-stem of the Pearl River below the Ross Barnett Reservoir and were lowest in tributaries and the West Pearl River Navigation Canal. Contrasting with previous …
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Estimating abundance, density, and occupancy of lion, leopard and serval in the Niokolo Koba National Park in Senegal
… and leopards, and non-spatial (MR) and spatial mark resight (SMR) methods for lions. Lions selected optimal sites with both high tree density and prey activity; leopards occupied areas with high tree density but with less prey activity; and servals selected habitats with more dense canopy cover …
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The Impact of Habitat Alteration on the Population Dynamics of a Declining Woodland Bird in the Mount Lofty Ranges
… drooping sheoak (Allocasuarina verticillata). A mark-resight study determined that S. guttata populations were affected by seasonal resource fluctuations. Stagonopleura guttata encounters were strongly correlated with seed abundance and S. guttata densities reflected seed biomasses. To further …
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Potential for resource competition between the boodie (Bettongia lesueur) and mala (Lagorchestes hirsutus) in the fenced Matuwa reserve, central Western Australia
… Spatially explicit capture recapture (SECR) and mark-resight models estimated a population size of over 110 individuals. With refined scat collection methods, DNA-based sampling will be an effective and valuable method for monitoring mala. This is a significant outcome because current methods …
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Population dynamics of Virginia's hunted black bear (Ursus americanus) population
… = 0.972, subadults = 0.917). Estimates using the mark-dead recoveries data showed survival rates of 0.840 for adult females (0.714 for 2-year-olds) and 0.769 for adult males (0.335 for 2-year-olds). We observed 34 mortalities of radio-collared bears for which hunting mortality accounted for 85%. …