Simulation Study of Estimators for the Line Transect Sampling Method

Primates of the Kilimi Area, Northwest Sierra Leone

“…Standardized methods of estimating wildlife num bers [e.g., Gates, 1969;Lamprey, 1964;Robinette et a!., 1974;Rodgers and Sale, 1976] could not be readily adapted to a census of arboreal forest primates. As a result, and taking into consideration the small size of the inland remnant forests where arboreal primates were reported, a decision was made to return over and over again to the limited number of forests where pri mates might be found until we could confidently esti mate the size of their populations.…”

Population biology of the black-tailed jackrabbit (Lepus californicus) in northern Utah

“…Equations for estimating population density based on observed flushing distances--specifically those of King (cf. Leopold, 1933:151) , Hayne (1949) , Gates et al (1968), and Gates (1969), are of the form D = n/2LW (Gates et al,…”

“…In the 1970 report, the Gates' (1969) census method was applied to the transect data pooled rather than to the individual transect data. periods (cf.…”

Population dynamics, movement, and home range of black-tailed jackrabbits (Lepus californicus) in Curlew Valley, northern Utah. Progress report, July 1, 1973--June 30, 1974

“…Since flushing behavior of j ackrabbits changes with density and between spring and fall, the absolute number of rabbits seen on the transects cannot be used as an index to density. Instead, we have utilized the flushing angles and distances and an equation derived by Gates (1969) to correct the transect results for observed changes in flushing behavior (Stoddart 1972 Transect results over the years of study (Table 1 and Fig. 1) show a slow, continuous decline in density from an index of 61 in fall 1963 to 21 in fall 1967.…”

“…·The situation got worse. Though the jackrabbit has a greater potential rate of increase, coyotes were essentially able to keep pace with them during density increase because of the rabbits reduced rate of growth in 1969-1971. By 1972 the coyote/rabbit ratio had increased to a point where coyote predation was again adding to adult and juvenile mortality rates and the population actually decreased over the breeding season these two years (Fig.…”