Abstract
Abstract Standard seabird offshore sampling techniques (Tasker et al., 1984; Webb, Durinck, 1992) assume that line transect of 300 m width is basically used for counting birds sitting on the water surface, whereas “snapshot” method is used for counting flying birds at strongly fixed intervals of time. All the birds counted using the above mentioned combination of methods are used for further calculations of seabird densities at some fixed intervals of time. There are several applications developed in Europe by the leading teams of marine ornithologists for calculation of average densities of seabirds recorded using the transect sampling method. Usually those are specific routines working within the environment of the most popular database management systems. Such a simplified approach often does not ensure a completely automatic process of data analysis and requires much additional effort of operators (recording ships position at selected intervals of time, multiple repetition of certain procedures while ...
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