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1 Vol. 19, No. 4 Acta Theriologica Sinica Nov., Ξ 3 (,, ) : ( Cricetulus t riton), 3 : (OF) ( IF) (OEF) ; OFIF OEF ( P < 0101), ( P < 0105 P < 0101) ;, OFIF OEF, 3 : ; ; ; ; : Q49115 : A : (1999) ( ),,, [1 ], [2,3 ] ;, [3 ] ( Cricet ul us t riton), [46 ], (, Flank gland),,,, (, Flank gland marking),, (, 1997) 3, Ξ : ( ), (STZ ) 3, 1997, :,, ,,, : : , :

2 4 : ; 100 g 15 m 2, (14L : 10D), 17 : 009 : 00), 23 2, 45 cm 30 cm 25 cm,,, ; Lux, 0112 Lux : (1) (6 ) ; (2) (6 ) ; (3) : (5 ) : 1 kg 60 mg : 1 cm 1 cm,, ; 75 %2 % ( ) :, ( ) 2170 mm 2126 mm 0122 mm, Medical Adhesive Silicone Type A (Dow Corn2 ing, Mildland, M I. Co. ), 17- estradiol benzoate (Sigma Chemical Co., St. Louis, MO. ) ; 10 mm, 215 mm, 5 mm ;, 24 h ;, 48, 113, r/ min, - 20 [7 ] 3 H - Amersham Organon, pg/ ml, 8164 %1318 %, Beckman L S Cantoni [8 ], 6 mm h, 1 ml ;, ;, - 20 ;,, 1/ 16 HP5890 II ( Hewlett Pachard 5890 II), BP20 ( Polythylene glycol, 25 m 0122 mm 25m), ( 25 cm/ s), 100 kpa, , l, 0175 s, 1 min, 2

3 264 19, 1 80, 8 / min 160, 2 4 / min 220, 20 min 2 (OF) ( IF) (OEF), ( P < 0101) ( 1), ( P < 0101),,, ( 2) [2 ],, ( Mesocricet us aurat us),, ; ( Meriones unguiculates), [3 ] Estradiol (pg/ ml) Body weight (g) 1 Table 1 Circulating levels of estradiol in ovariectomized, intact and ovariectomized plus estradiol treatment female ratlike hamsters ( gx SD) + Ovariectomized plus estradiol Ovariectomized females Intact females treatment females Sample size = P < 0101, ANOVA Indicates significant differences among three groups, using one way ANOVA test 2 Table 2 Differences in sizes of flank glands of ovariectomized, intact and ovariectomized plus estradiol treatment female ratlike hamsters ( gx SD) Sample size Weight (mg) Sizes of flank gland Length (mm) Width (mm) Thickness (mm) Ovariectomized females Intact females Females ovariectomized plus estradiol treatment = P < = P < 0101 ANOVA Indicate significant differences among three groups, using one way ANOVA test, (, 10 min ) ; (,

4 4 : (A) ( B) + (C) Fig11 Comparison of gas chromatograms obtained from the flank gland secretions of ovariectomized (A) intact (B) and ovariectomized plus estradiol treatment female ratlike hamsters ( Cricet ulus t riton) min ) ( 1), [9 ] (, 1997) 3,, [10 ] ; [11 ],,,,, [1 ] Muller2Schwarze D. Scent gland in mammals and their functions. In : Eisenberg J F, Kleiman D G eds. Advances in the Study of Mammalian Behavior [ C ]. Special Publications No. 7, The American Society of Mammologist,

5 [ 2 ] Ebling F J. Hormonal control of mammalian skin glands. In : Muller2Schwarze D, Mozell M M editors. Chemical Signals in Vertebrates [ C]. New York and London : Plenum Press, [ 3 ] Brown R E. The rodents. II. Suborder Myomorpha. In : Brown R E, Macdonald D W eds. Social odours in mam2 mals [ C]. Oxford : Oxford University Press, [ 4 ].. :,. [ C]. :, [ 5 ],,.,. :,. [ C]. :, [ 6 ]. [J ]., 1987, 7 (3) : [7 ],,.,, [J ]., 1980, 11 (3) : [8 ] Cantoni D, Favre L, Tencalla F T. Intra2and Interindividual variation in flank gland secretions of free2ranging shrews ( Croci dura russula) [J ]. J Chem Ecol, 1996, 22 (9) : [ 9 ] Muller2Schwarze D. Molecules in mammalian communication. In : Maruani J ed Molecules, Physics, Chemistry and Biology [ C]. Kluwer Academic Publishers, : [ 10 ] Gawienowski A M. Chemical attractants of the rat preputial gland. In : Muller2Schwarze D, Mozell M M editors. Chemical Signals in Vertebrates [ C]. New York and London : Plenum Press, [ 11 ] Novotny M. Chemical studies of the primer mouse pheromones. In : Muller2Schwarze D, Silverstein R M eds. Chemical Signals : Vertebrates and Aquatic Invertebrates [ C]. New York : Plenum Press, A PREL IMINARY STUDY OF EFFECTS OF ESTRADIOL ON FLANK GLANDS IN RATL IKE HAMSTERS ( CRIC ETUL US TRI TON) ZHAN G Jianxu WAN G Zuwang ZHAN G Zhibin ( Instit ute of Zoology, the Chinese Academy of Sciences, Beijing, , China) Abstract : The effects of estradiol on the size and secretion chemistry of flank glands in fe2 male ratlike hamsters ( Cricet ul us t riton) were st udied. By surgical procedure and hormone replacement, t hree groups of hamsters being different in reproductive stat us were formed, which were ovariectomized (OF), intact ( IF ) and overiectomized plus est radiol capsules fe2 males (O EF). From OF to O EF, blood levels of est radiol determined by radioimmunoassay was getting higher ( P < 0101), while the weight, length, width and thickness of flank glands were getting less ( P < 0105 or P < 0101) by groups. Gas chromatograp hy was used to measure t he differences in flank gland secretions among t hree groups of hamsters. It was found t hat t here were qualitative and quantitative changes among chemical compounds of flank gland secretions of t hree groups. Some compounds have a decrease in quantity f rom OF to OEF, and less and less compounds were detected from OF to OEF. The results evidenced that estradiol can inhibit both size and secretion activity of flank glands. Key words : Ratlike hamster ( Cricet ul us t riton ) ; Est radiol ; Flank gland ; Morp hology ; Chemist ry

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