Results 21 to 30 of about 83,949 (294)
Echolocation detections and digital video surveys provide reliable estimates of the relative density of harbour porpoises [PDF]
, 2016 Acknowledgements We would like to thank Erik Rexstad and Rob Williams for useful reviews of this manuscript. The collection of visual and acoustic data was funded by the UK Department of Energy & Climate Change, the Scottish Government, Collaborative ...
Beth E. Scott +10 more
core +2 more sources
How many fish? Comparison of two underwater visual sampling methods for monitoring fish communities [PDF]
PeerJ, 2018 Background Underwater visual surveys (UVSs) for monitoring fish communities are preferred over fishing surveys in certain habitats, such as rocky or coral reefs and seagrass beds and are the standard monitoring tool in many cases, especially in protected
Zoi Thanopoulou +5 more
doaj +2 more sources
Wildlife Society Bulletin, 2014 Population assessment is a primary component of ungulate management, but managers are continuously under pressure to reduce survey cost. Another concern in aerial surveys is accounting for undetected animals (i.e., visibility bias).
Wibke Peters +7 more
doaj +1 more source
Status Review of Guinayangan Quezon Mangrove Forest: An Assessment of Species Diversity and Habitat Analysis [PDF]
E3S Web of ConferencesThis study was conducted to determine the status of the Mangrove Walk located in Brgy. Calimpak, Guinayangan, Quezon. Three main procedures were undertaken: species identification; habitat analysis using percent crown cover, regeneration per m², and ...
Escobal Charisse Angelique M. +1 more
doaj +1 more source
Long-term population trends of introduced mammals on an tropical island
Global Ecology and Conservation, 2023 The introduction of species in areas with no top-down control is a recipe for ecosystem catastrophe. Theory predicts that introduced species in areas that lack predators may experience rapid growth and subsequently crash or stabilize around the carrying ...
Júlio Haji +5 more
doaj +1 more source
A Unimodal Model for Double Observer Distance Sampling Surveys. [PDF]
PLoS ONE, 2015 Distance sampling is a widely used method to estimate animal population size. Most distance sampling models utilize a monotonically decreasing detection function such as a half-normal.
Earl F Becker, Aaron M Christ
doaj +1 more source
Evaluation of a hydrographic technique to measure on-farm water storage volumes [PDF]
, 2005 Digital terrain models of on-farm water storages are required to assist in accurately measuring the on-farm water balance and water use efficiency components including storage capacity, inflow, seepage, evaporation and discharge volumes.
Clark +10 more
core +1 more source
CityScapeLab Berlin: A Research Platform for Untangling Urbanization Effects on Biodiversity [PDF]
, 2020 Urban biodiversity conservation requires an understanding of how urbanization modulates biodiversity patterns and the associated ecosystem services. While important advances have been made in the conceptual development of urban biodiversity research over
Buchholz, Sascha +4 more
core +1 more source
Zoologia (Curitiba), 2013 Line-transect surveys are commonly used for sampling large mammals, but estimates of the effort needed to reliably surveying low-diversity assemblages of mammals are scarce.
Ítalo Mourthé
doaj +3 more sources
European Journal of Entomology, 2018 The outcome of assessments of the biodiversity of a taxonomic group often depend on the sampling method. The choice of an adequate method is especially important for biomonitoring purposes.
Raja I. HUSSAIN +5 more
doaj +1 more source