Seasonal shifts within juvenile recruit sex ratio of Pampas mice (Akodon azarae)
Sex ratio (SR) variation of Akodon azarae juvenile recruits was analysed during 1985–86 on a Pampean grassland in central Argentina. Rodents were intensively live‐trapped on a 0.81 ha grid. The SR (proportion of males) of the overall population did not differ significantly from evenness (0.49). In c...
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1992
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| LEADER | 07107caa a22006017a 4500 | ||
|---|---|---|---|
| 001 | PAPER-19256 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250313143651.0 | ||
| 008 | 190411s1992 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0027039199 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Zuleta, G.A. | |
| 245 | 1 | 0 | |a Seasonal shifts within juvenile recruit sex ratio of Pampas mice (Akodon azarae) |
| 260 | |c 1992 | ||
| 270 | 1 | 0 | |m Zuleta, G.A.; Departamento de Biologia, Universidad de Buenos Aires, Ciudad Universitaria, Area Ecologia, Pab. II, 4d̀ p, Buenos Aires, 1428, Argentina |
| 504 | |a Charnov, E.L., (1982), pp. 1-355. , The theory of sex allocation. Monogr. Popul. Biol. No. 18; Crespo, J.A., Ecologia de una comunidad de roedores silvestres en el Partido de Rojas, Provincia de Buenos Aires (1966) Revta Mus. argent. Cienc. nat. “Bernardino Rivadavia” Inst. nac. Invest. Cienc. nat. (Ecol.), 1, pp. 79-134 | ||
| 504 | |a Crow, J.F., Kimura, M., (1970) An introduction to population genetics theory, , New York:, Harper & Row | ||
| 504 | |a Dalby, P.L., Biology of pampa rodents, Balcarce Area, Argentina (1975) Pubis Mus. Mich. St. Univ. Biol. Ser., 5, pp. 149-271 | ||
| 504 | |a De Villafañe, G., Reproducción y crecimiento de Akodon azarae azarae (Fisher, 1829) (1981) Hist. Nat., Mendoza, 1, pp. 193-204 | ||
| 504 | |a Fisher, R.A., (1930) The genetical theory of natural selection, , Oxford:, Clarendon Press | ||
| 504 | |a Hansson, L., Vole sex ratios: the importance of mating systems and maternal condition (1987) Oikos, 49, pp. 161-164 | ||
| 504 | |a Kalela, O., Seasonal trends in the sex ratio of the grey‐sided vole, Clethrionomys rufocanus (Sund.) (1971) Annls zool. fenn., 8, pp. 452-455 | ||
| 504 | |a Kaufman, D.W., Kaufman, G.A., Sex ratio in natural populations of Peromyscus leucopus (1982) Journal of Mammalogy, 63, pp. 655-658 | ||
| 504 | |a Krebs, C.J., Demographic changes in fluctuating populations of Microtus californicus (1966) Ecological Monographs, 36, pp. 239-273 | ||
| 504 | |a Lidicker, W.Z., Jr., Regulation of numbers in an island population of the California vole, a problem in community dynamics (1973) Ecological Monographs, 43, pp. 271-302 | ||
| 504 | |a Maynard Smith, J., Evolution and the theory of games (1976) Am. Scient., 64, pp. 41-45 | ||
| 504 | |a Maynard Smith, J., A new theory of sexual investment Behav (1980) Ecol. Sociobiol., 7, pp. 247-251 | ||
| 504 | |a McClure, P.A., Sex‐biased litter reduction in food‐restricted wood rats (Neotoma floridana) (1981) Science, N.Y., 211, pp. 1058-1060 | ||
| 504 | |a McShea, W.J., Madison, D.M., Sex ratio shifts within litters of meadow voles (Microtus pennsylvanicus) (1986) Behav. Ecol. Sociobiol., 18, pp. 431-436 | ||
| 504 | |a Myers, J.H., Krebs, C.J., Sex ratio in open and enclosed vole populations: demographic implications (1971) Am. Nat., 105, pp. 324-344 | ||
| 504 | |a Pearson, O.P., La estructura por edades y la dinámica reproductiva en una población de ratones de campo, Akodon azarae (1967) Physis, B. Aires, 27, pp. 53-58 | ||
| 504 | |a Pyke, D.A., Thompson, J.N., Statistical analysis of survival and removal rate experiments (1986) Ecology, 67, pp. 240-245 | ||
| 504 | |a Trivers, R.L., Willard, D.E., Natural selection of parental ability to vary the sex ratio of offspring (1973) Science, N.Y., 179, pp. 90-92 | ||
| 504 | |a Werren, J.H., Charnov, E.L., Facultative sex ratios and population dynamics (1978) Nature, Lond., 272, pp. 349-350 | ||
| 504 | |a Williams, G.C., The question of adaptive sex ratio in outcrossed vertebrates (1979) Proc. R. Soc. (B), 205, pp. 567-580 | ||
| 504 | |a Wright, S.L., Crawford, C.B., Anderson, J.L., Allocation of reproductive effort in Mus domesticus: responses of offspring sex ratio and quality to social density and food availability (1988) Behav. Ecol. Sociobiol., 23, pp. 357-365 | ||
| 504 | |a Zuleta, G.A., (1989), Estrategias de historia de vida en el raton del pastizal pampeano, Akodon azarae. PhD thesis, Buenos Aires University; Zuleta, G.A., Kravetz, F.O., Busch, M., Percich, R.E., Dinámica poblacional del ratón del pastizal pampeano (Akodon azarae), en encosistemas agrarios de Argentina (1988) Revta chil. Hist. nat., 61, pp. 231-244 | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a Sex ratio (SR) variation of Akodon azarae juvenile recruits was analysed during 1985–86 on a Pampean grassland in central Argentina. Rodents were intensively live‐trapped on a 0.81 ha grid. The SR (proportion of males) of the overall population did not differ significantly from evenness (0.49). In contrast, juvenile recruits (0.5–2.0 months of age) showed SR fluctuations according to their time of birth. SR was strongly female‐biased among spring and autumn juveniles (0.13 and 0.33, respectively), while males were predominant (0.72) among the summer juveniles. Social and demographic implications of these results are discussed in the framework of current SR theory. Spring female recruits should be selected for summer reproduction and autumn female recruits for winter survival and spring reproduction. The overwintered population was characterized by 1:1 SR and an age structure composed of males older than females. Most of these males had been recruited as juveniles during the summer. They also made up most of the resident male population in the spring. A selective allocation of energy by the mothers among their offspring is the mechanism proposed to explain the seasonal changes in SR, as pregnant females which gave birth to the summer recruits were in better physical condition than the mothers of both spring and autumn recruits. These results are consistent with the predictions of Werren & Charnov (1978), based on temporal overproduction of one or the other sex according to differential changes in the life‐history expectations for both sexes. Copyright © 1992, Wiley Blackwell. All rights reserved |l eng | |
| 593 | |a Departamento de Biologia, Universidad de Buenos Aires, Ciudad Universitaria, Area Ecologia, Pab. II, 4d̀ p, Buenos Aires, 1428, Argentina | ||
| 651 | 4 | |a ARGENTINA, PAMPAS | |
| 690 | 1 | 0 | |a PAMPAS MOUSE |
| 690 | 1 | 0 | |a RECRUITMENT |
| 690 | 1 | 0 | |a SEX RATIO |
| 690 | 1 | 0 | |a AKODON AZARAE |
| 700 | 1 | |a Bilenca, David Norberto | |
| 773 | 0 | |d 1992 |g v. 227 |h pp. 397-404 |k n. 3 |p J. Zool. |x 09528369 |w (AR-BaUEN)CENRE-5898 |t Journal of Zoology | |
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