Improving the aerial line transect method
Line Transect Methods for Plant Surveys
... This method may also be used to estimate cv ( n E ) ...robust method of estimating variance, without having to assume independence between Pˆ E and Pˆ N ...in line transect sampling, the lines ...
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Design and analysis of line transect surveys for primates
... the line. We outline the standard method, emphasizing the assumptions underlying the ...standard line transect sampling cannot deliver reliable abundance ...
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Influence of transect length and downed woody debris abundance on precision of the line-intersect sampling method
... varying transect lengths) would impact estimates and their uncertainty, a model is in- ...selected transect are likely to display autocorrelation because of the fixed characteristics of the downed woody ...
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The point count transect method for estimates of biodiversity on coral reefs: improving the sampling of rare species
... time-efficient method of collecting ecological data on coral reefs. This method will be particularly effective for examining questions such depth- diversity gradients, where the amount of survey time is ...
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Double-observer line transect methods : levels of independence
... The methods used in the SCANS surveys were designed to break up the dependence between the two observers, by ensuring that they are not simultaneously searching the same patch of sea. A ‘tracker’ scans with high-powered ...
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Double observer line transect methods : levels of independence
... The methods used in the SCANS surveys were designed to break up the dependence between the two observers, by ensuring that they are not simultaneously searching the same patch of sea. A ‘tracker’ scans with high-powered ...
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The effect of animal movement on line transect estimates of abundance
... Abstract Line transect sampling is a distance sampling method for estimating the abundance of wild animal ...this method is that all animals are detected at their initial ...the ...
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Kernel Estimation in Line Transect Sampling for Parametric Model
... Line transect sampling is a common method used in ecology for sampling the sample ...kernel method to propose new estimator of the propose population ...estimation method is used due to ...
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Methods for investigating measurement error in cetacean line transect surveys
... There may be qualitative differences in the way that the human eye perceives distance to fixed, continuously- visible targets of constant size such as floats, and transient cues such as a whale’s blow or body. Similarly, ...
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Some Improvements in Kernel Estimation Using Line Transect Sampling
... a method to choose a reference density in bandwidth calculation for kernel estimator using line transect ...The method based on testing the shoulder condition, if the shoulder condition seems ...
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Line-transect distance sampling compared with fixed-width strip-transect counts for assessing tomtit (Petroica macrocephala) population trends
... after aerial 1080-poisoning for control of the brushtail possum (Trichosurus ...36 transect lines in each of two forests (one prefed with non-toxic bait and one not ...the transect lines, most likely ...
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Line transect sampling of primates : can animal-to-observer distance methods work?
... single transect, which formed the shape of a square ...Kelker method to compare densities between years and resorted to comparing encounter rates of primate groups per kilometre ...Kelker method ...
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Using hidden Markov models to deal with availability bias on line transect surveys
... for line transect surveys of animals that are stochastically unavailable for detection while within detection ...parametric method of dealing with availability bias when estimates of availability ...
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Accommodating availability bias on line transect surveys using hidden Markov models
... existing line transect methods are ...existing line transect method estimators can be “corrected” using estimates of the proportion of time animals are ...generally-applicable ...
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Line transect sampling of primates : can animal to observer distance methods work?
... Line Transect Sampling of Primates: Can Animal-to-Observer Distance Methods Work? Stephen ...Abstract Line transect sampling is widely used for estimating abundance of primate ...of ...
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Methods for estimating sperm whale abundance from passive acoustic line transect surveys
... • At worst, you can specify γ and λ - and then you’re down to the method of Section 3. 3. Cue-counting approach (NOTE: notation in this section is a bit inconsistent with that above.) A cue-counting approach ...
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Review of potential line transect methodologies for estimating abundance of dolphin stocks in the eastern tropical Pacific
... Both methods in the United Kingdom use a two-phase method for analysing digital data generated. The first phase requires a review of all material, with 10% or 20% of all material subjected to a random blind audit, ...
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Small-boat surveys for coastal dolphins: line-transect surveys of Hector’s dolphins (Cephalorhynchus hectori)
... Conventional line-transect estimates can be biased as a result of responsive movement of the target species and animals on or near the trackline being missed by observers (Buckland et ...a method ...
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Semi-automatic extraction of line features from aerial photographs
... Some weak sides of this developed method and soft- ware are also found out. Especially on big scale ae- rial photographs, the obstacles on the features, as trees, cars and shadows, effects the extraction of the ...
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Line matching based on planar homography for stereo aerial images
... this method can only handle with more than three images not stereo ...cross-correlation method to match edges from linear array images (Zhang , 2005) with the help of the local geometric and photometric ...
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