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New regression formula to estimate the whole population for recapture‐addicted small mammals
Author(s) -
Tanaka Ryo,
Kanamori Masaomi
Publication year - 1967
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02514916
Subject(s) - vole , mark and recapture , statistics , population , variance (accounting) , census , microtus , regression , biology , trap (plumbing) , mathematics , econometrics , ecology , demography , geography , sociology , meteorology , business , accounting
Summary We have devised a census formula of curvilinear regression suitable for capture‐recapture data of recapture‐addicted populations of the Japanese field vole ( Microtus montebelli ) obtained under a grid‐plan with single‐catch traps in order to estimate the whole population. The equation is founded on the assumption that the trappable population on the initial day is increased in way of an exponential curve until it reaches to the whole during one trapping period. The effect of trap‐preoccupation by marked and multiple collisions is considered in the formula. As a result of its application to field data of the vole, it has turned out that the equation is required for the data gained under the trapping plan with trap spacing 10m, but not for those under the plan with spacing 5m, to estimate the whole. A convenient method of analysis of the formula is offered here, but we have been yet unable to introduce assymptotic variance of estimates.