Chapter VI Dispersal by flight Fig VI-4

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Fig VI-4. Decrease rates of three isolated populations in different years

The marked beetles were released for the first time on April 28 (A), July 5 (B) and September 14 (C, females only)
Y-axis: minimum percentage of beetles present in the population x days after first release(probit scale, see Southwood 1978)
X-axis: number of days after first release

= Sns; isolated ditch, clip-winged part of the population (1977)

= SnS; isolated ditch, full-winged part of the population (1977)

=
SpG; pool outside the study area (1969)

=
Zp; isolated pool in the study area

Fig VI-4.	Decrease rates of three isolated populations in different years The marked beetles were released for the first time on April 28 (A), July 5 (B) and September 14 (C, females only) Y-axis: minimum percentage of beetles present in the population x days after first release(probit scale, see Southwood 1978) X-axis: number of days after first release
=	Sns; isolated ditch, clip-winged part of the population (1977)
=	SnS; isolated ditch, full-winged part of the population (1977)
=	SpG; pool outside the study area (1969)
=	Zp; isolated pool in the study area