caa a22 4500 467902534 CHVBK 20180406152822.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s10661-006-1490-x doi (NATIONALLICENCE)springer-10.1007/s10661-006-1490-x Kalikhman I. Yigal Allon Kinneret Limnological Laboratory, Israel Oceanographic and Limnological Research Ltd, Tel-Shikmona, 31080, Haifa, Israel aut Patchy Distribution Fields: Sampling Distance Unit of an Interleaved Survey and Reconstruction Adequacy [Elektronische Daten] [I. Kalikhman] A mathematical model was used to examine the effects of choosing various units of sampling distance of an interleaved (two-pass) acoustic survey on the adequacy of reconstructing patchy distribution fields. The model simulates fish or plankton patches (or gaps) of different shapes and spatial orientations, and an interleaved survey by parallel or zigzag transects, along which a unit of sampling distance is set. The efficiency of a survey is determined by the adequacy of a reconstructed field to that originally generated, which is evaluated by calculating their correlations (r). Regarding immovable fields, the experiments conducted indicate that a patchy field can be reconstructed properly (r 2 > 0.70) if the distance between transects D < (1.5-2.0)R and the unit of sampling distance d < (1.5- 2.0)R p. As, for regular surveys d < (1.0-1.5)R p, it may be concluded that interleaved surveys are more efficient than regular ones because of the factor studied. In regard to movable fields, a comparison of the results of interleaved surveys with those of regular surveys directly indicates that the former may ensure a more adequate field reconstruction than the latter do. This fact confirms the previous conclusion that an interleaved survey is expedient in cases where there is no preference regarding the position of a vessel for further work. Springer Science + Business Media, Inc., 2006 adequacy nationallicence interleaved survey nationallicence mathematical simulation nationallicence patch nationallicence reconstruction nationallicence sampling distance unit nationallicence Environmental Monitoring and Assessment Kluwer Academic Publishers 118/1-3(2006-07-01), 147-163 0167-6369 118:1-3<147 2006 118 10661 https://doi.org/10.1007/s10661-006-1490-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-1490-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kalikhman I. Yigal Allon Kinneret Limnological Laboratory, Israel Oceanographic and Limnological Research Ltd, Tel-Shikmona, 31080, Haifa, Israel aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 118/1-3(2006-07-01), 147-163 0167-6369 118:1-3<147 2006 118 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 399047867 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer