Influence of Male Surgical Ligation Sterilization on the Odor and Individual Preference of Female Brandt s Vole

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1 Acta Theriologica Sinica Vol123, No13 Aug., (,, ) : Y : ; ; ; ; : Q95811 : A : (2003) Influence of Male Surgical Ligation Sterilization on the Odor and Individual Preference of Female Brandt s Vole ZHANGJianjun LIANG Hong ZHANG Zhibin ( State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, the Chinese Academy of Sciences, Beijing, ) Abstract : In Y2shape labyrinth, by using the nesting material of surgical ligation sterilized males and intact males as the odor stimuli, the odor preference of the female Brandt s vole are conducted1 The sterilized and intact males were also shown to the fe2 male vole in the individual preference test1 The results showed that the female voles did not show significant preference either in the odor preference study or in the individual preference study1 The content of testosterone and cortisol in blood serum that were determined by 125 I radioimmunity in surgical sterilized male voles were somewhat higher than that in intact male voles, but it showed no influence on the female preference experiments1 Sterilization is ideal for studying the fertility control for Brandt s vole1 Key words : Brandt s vole ( Microtus brandti) ; Male sterilization ; Odor preference ; Individual preference ; Management of steril2 ization,, ;, ( Microtus brandti ) [6 ] [1 ] [7, ] [2 4 ],,, [5 ] [8,9, ], : ( KSCX2 - SW ; KSCX2 - SW - 103) ; (FS ) : ( ),,. : ; : , E2mail : ioz. ac. cn

2 226 23,,,,, 2 cm,,,,,,,,, 1 111, 2,, ( g) ( g) ( t = 01413, df = 38, P = 2815 cm 1712 cm 1518 cm 01682) ( ),,, 8 m 2, 16 L 8 D, 05 : 00, m 2, 25 1 Y, 70 cm, 60 cm, 14 cm, 20 cm, cm, 3 cm 80 w ;, ; ( 1) ml, 019 % 34 ml 40, 20,, 1 Y Fig11 The sketch map of Y shape labyrinth plane 1. ; 2. ; 3. ; Stimulating origin box ; 2. Preference arm ; 3. Public arm ; 4. Adaptation box : 114, (C 11 H 17 O 3 N 2 Na) 2 g, 1, mgπml 60 mg 10, 100 g 0115 ml

3 3 : 227 :,,, min, Pearson [10, ] Fortier [11 ], ( r = 01710, P = 0100 < , df = 60),, min,,, 2 : (1) ;, : Z = 01561, P = ; Z = 01595, P = (2) Z = 01051, P = ; : Z = 01679, P = (3) 10 Z = 11478, P = ; : Z = 11125, P = , 4 d, 1, 75 %, 08 : : 00 ( ) 115, 20 10,, 4, rπmin 30 min, 115 ml - 20, I (T) 125 I 125 I 2 Fig12 Odor preference of Brandt s female vole ngπml, ngπml % 714 %, 311 % 611 % < 5 % < 10 % Beckman LS 6000 ( r = 01579, P = 0100 < 0105, df = 60) (Pearson ), 116, ( One2sample Kolmogorov2Smirnov test 3) : (1) ( Wilcoxon Signed Z = 11478, P = ; : Z = 11067, P = Ranks Test) (2), t Z = 11172, P = ; : Z = 01632, P ( ), Pearson = (3), ( ) : Z = 11376, P = ; : Z = 01153, a = 0105 P = 01878,

4 I ( 1), ( : t = 01568, df = 23, P = ; : t = 01637, df = 24, P = 01530),,, ( : F = 01003, df = 1, P = 3 Fig13 Individual preference of Brand s female vole ; : F = 21779, df = 1, P = 01111) 1 Table 1 Content of testosterone and cortisol in blood serum of normal male voles and sterilized male voles (ngπdl) Testosterone (ngπml) Cortisol N Mean Normal male Sterilized male Normal male Sterilized male Std1Deviation [14 16 ],, ( Taeniopygia gut2 tata),, [12 ] Ferkin [13 ] ( Microtus, pennsylvanicus),,,, [7,8 ],, : (1),,, ; (2),,, ; (3)

5 3 : 229, ; (4), ( [10 ],,. ) [J ]., 1999, 19 (2) : , Knipling [17,18 ], [19 24 ] Zhan2 g [23 ] ( Cricetulus trition) [14, ] [ J ]. (3) : : : [1 ] Doty R L. Odor2guided behavior in mammals [J ]. Experientia, [18 ] Knipling E F. Use of insects for their own destruction [J ]. Jour2 1986, 42 : nal of Economic Entomology, 1960, 53 (3) : [2 ] Johnston R E. Chemical communication in golden hamster : from be2 [19 ] Caughley G, Pech R, Grice D. Effect of fertility control on a popu2 havior to molecules and neural mechanisms [ A]. In : Dewbury D A ed. Contemporary Issues in Comparative Psychology [ C]. Sunber2 lation, s productivity [J ] Wildlife Research, 1992, 19 : land M A : Sinauer, [20 ] Hone J. Rate of increase and fertility control [J ]. Journal of Ap2 [3 ] Johnston R E. Communication [ A]. In : Siegel H I ed. The Ham2 plied Ecology, 1992, 29 : ster2reproduction and Behavior [ C ]. New York : Plenum Press, [ 21 ] Barlow N D, Kean J M, Briggs C J. Modelling the relative effica cy of culling and sterilization for controlling populations [J ]. Wild2 [4 ] Brown R E. The rodents : Myormorpha [ A ]. In : Brown R E life Research, 1997, 24 : and Macdonald D W eds. Social Odours in Mammals [ C]. Oxford : [ 22 ] Sinclair A R E. Fertility control of mammals pests and the conserva2 Oxford University Press, tion of endangered marsupials [J ]. Reproduction, Fertility and De2 [5 ] velopment, 1997, 9 : [J ]., 1995, 11 (2) : [ 23 ] Zhang Z. Mathematical models of wildlife management by contra2 [6 ] ception [J ]. Ecological Modelling, 2000, 132 : [J ]., 1988, 8 (4) : [24 ] Shi D Z, Wan X, Davis S, Pech R, Zhang Z. Simulation of lethal [7 ],. [J ]., 1998, 44 (2) : [8 ],. [J ]., 1999, 45 (3) : [9 ],,. [J ]., 2002, 48 (1) : [11 ] Fortier G M, Erskine M S, Tamarin R H. Female familiarity influ2 ences odor preferences and plasma estradiol levels in the meadow voles, Microtus Pennsylvanicus [ J ]. Physiology and Behavior, 59 : [12 ] Monaghan P, Metcalfe N B, Houston D C. Male finches selectively pair with fecund females [J ]. London, series B. 1996, 263 : Proceedings of the royal society of [13 ] Ferkin M H, Sorokin E S, Johnston R E, Lee CJ. Attractiveness of scents varies with protein content of the diet in meadow voles [J ]. Animal Behavior, 1997, 53 (1) : [14 ],,,,. -, 1997, 17 [15 ],,,,. - [J ]., 1997, 43 (2) : [16 ],,,,,. [J ]., 2001, 47 (3) : [17 ] Knipling E F. Sterile male method of population control [J ]. Sci2 ence. 1959, 130 : and fertility control in a demographic model for Brandt s vole ( Mi2 crotus brandti) [J ]. Journal of Applied Ecology, 2002, 39 (2) :

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