Sex-ratio variation in Soay sheep

Behavioral Ecology and Sociobiology

Volumn 53, Issue 1, 2002, Pages 25-30

  Lindström, Jan ^a,e   Coulson, Tim ^a   Kruuk, Loeske ^b   Forchhammer, Mads C ^a,c   Coltman, Dave W ^b,d   Clutton Brock, Tim ^a  

^a UNIVERSITY OF CAMBRIDGE   (United Kingdom)

^b UNIVERSITY OF EDINBURGH   (United Kingdom)

^c UNIVERSITY OF COPENHAGEN   (Denmark)

^d UNIVERSITY OF SHEFFIELD   (United Kingdom)

^e UNIVERSITY OF GLASGOW   (United Kingdom)

Author keywords

Maternal effects; Ovis aries; Sexual size dimorphism; St Kilda; Trivers Willard hypothesis

Indexed keywords

ECOLOGICAL MODELING; SEX RATIO; SEXUAL DIMORPHISM; SHEEP;

UNITED KINGDOM;

DRYAS IULIA; LAMB; OVIS ARIES;

EID: 0037672724     PISSN: 03405443     EISSN: None     Source Type: Journal    
DOI: 10.1007/s00265-002-0545-4     Document Type: Article

References (37)

1. Birgersson B (1998) Adaptive adjustment of the sex ratio: more data and considerations from a fallow deer population. Behav Ecol 9:404-408
2. Boyd JM, Jewell PA (1974) The Soay sheep and their environment: a synthesis. In: Jewell PA, Milner G, Morton Boyd J (eds) Island survivors. Athlone Press, London, pp 360-373
3. Clutton-Brock TH (1985) Birth sex ratios and reproductive success of sons and daughters. In: Greenwood PJ, Harvey PH, Slatkin M (eds) Evolution: essays in honor of John Maynard Smith. Cambridge University Press, Cambridge, pp 221-235
4. Clutton-Brock TH, Iason GR (1986) Sex ratio variation in mammals. Q Rev Biol 61:339-374
5. Clutton-Brock TH, Guinness FE, Albon SD (1982) Red deer: behaviour and ecology of two sexes. University of Chicago Press, Chicago
6. Clutton-Brock TH, Albon SD, Guinness FE (1984) Maternal dominance, breeding success and birth sex ratios in red deer. Nature 308:358-359
7. Clutton-Brock TH, Albon SD, Guinness FE (1986) Great expectations: dominance, breeding success and offspring sex ratios in red deer. Anim Behav 34:460-471
8. Clutton-Brock TH, Price OF, Albon SD, Jewell PA (1991) Persistent instability and population regulation in Soay sheep. J Anim Ecol 60:593-608
9. Clutton-Brock TH, Price OF, Albon SD, Jewell PA (1992) Early development and population fluctuations in Soay sheep. J Anim Ecol 61:381-396
10. Clutton-Brock TH, Stevenson IR, Marrow P, MacColl AD, Houston AI, McNamara JM (1996) Population fluctuations, reproductive costs and life-history tactics in female Soay sheep. J Anim Ecol 65:675-689
11. Clutton-Brock TH, Illius AW, Wilson K, Grenfell BT, MacColl ADC, Albon SD (1997) Stability and instability in ungulate populations: an empirical analysis. Am Nat 149:195-219
12. Cockburn A, Legge S, Double MC (2002) Sex ratios in birds and mammals: can the hypotheses be disentangled? In: Hardy ICW (ed) Sex ratios. Concepts and research methods. Cambridge University Press, Cambridge, pp 266-286
13. Coltman DW, Bancroft DR, Robertson A, Smith JA, Clutton-Brock TH, Pemberton JM (1999a) Male reproductive success in a promiscuous mammal: behavioural estimates compared with genetic paternity. Mol Ecol 8:1199-1209
14. Coltman DW, Smith JA, Bancroft DR, Pilkington J, Pemberton JM (1999b) Density-dependent variation in lifetime breeding success and natural and sexual selection in Soay rams. Am Nat 154:730-746
15. Côté SD, Festa-Bianchet M (2001) Offspring sex ratio in relation to maternal age and social rank in mountain goats (Oreamnos americanus). Behav Ecol Sociobiol 49:260-265
16. Davidian M, Giltinan DM (1995) Nonlinear models for repeated measurement data. Chapman and Hall, Boca Raton, Fla.
17. Forchhammer MC (2000) Timing of foetal growth spurts can explain sex ratio variation in polygynous mammals. Ecol Lett 3:1-4
18. Forchhammer MC, Clutton-Brock TH, Lindström J, Albon SD (2001) Climate and population density induce long-term cohort variation in a northern ungulate. J Anim Ecol 70:721-729
19. Frank SA (1990) Sex allocation theory for birds and mammals. Annu Rev Ecol Syst 21:13-55
20. Grenfell BT, Wilson K, Finkenstädt BF, Coulson TN, Murray S, Albon SD, Pemberton JM, Clutton-Brock TH, Crawley MJ (1998) Noise and determinism in synchronised sheep dynamics. Nature 394:674-677
21. Grubb PJ (1974) Population dynamics of Soay sheep. In: Jewell PA, Milner G, Morton Boyd J (eds) Island survivors. Athlone Press, London, pp 242-272
22. Hewison AJM, Gaillard J-M (1999) Successful sons or advantaged daughters? The Trivers-Willard model and sex-biased maternal investment in ungulates. Trends Ecol Evol 14:229-234
23. Kent JP (1995) Birth sex ratios in sheep over nine lambing seasons: years 7-9 and the effects of ageing. Behav Ecol Sociobiol 36:101-104
24. Kojola I (1997) Social status and physical condition of mother and sex ratio of offspring in cervids. Appl Anim Behav Sci 51:267-274
25. Kruuk LEB, Clutton-Brock TH, Albon SD, Pemberton JM, Guinness FE (1999) Population density affects sex ratio variation in red deer. Nature 399:459-461
26. Marrow P, McNamara JM, Houston AI, Stevenson IR, Clutton-Brock TH (1996) State-dependent life history evolution in Soya sheep: dynamic modelling of reproductive scheduling. Philos Trans R Soc Lond B 351:17-32
27. Milner JM, Elston DA, Albon SD (1999) Estimating the contributions of population density and climatic fluctuations to interannual variation in survival of Soay sheep. J Anim Ecol 68:1235-1247
28. Mysterud A, Yoccoz NG, Stenseth N-C, Langvatn R (2000) Relationships between sex ratio, climate and density in red deer: the importance of spatial scale. J Anim Ecol 69:959-974
29. Palmer AR (2000) Quasi-replication and the contract of error: lessons from sex ratios, heritabilities and fluctuating asymmetry. Annu Rev Ecol Syst 31:441-480
30. Post E, Forchhammer MC, Stenseth NC, Langvatn R (1999) Extrinsic modification of vertebrate sex ratios by climatic variation. Am Nat 154:194-204
31. Schall R (1991) Estimation in generalized linear models with random effects. Biometrika 78:719-727
32. Skogland T (1986) Sex ratio variation in relation to maternal condition and parental investment in wild reindeer Rangifer t. tarandus. Oikos 46:417-419
33. Sokal RR, Rohlf FJ (1995) Biometry. Freeman, New York
34. Trivers RL, Willard DE (1973) Natural selection of parental ability to vary the sex ratio of offspring. Science 179:90-92
35. Verme LJ (1983) Sex ratio variation in Odocoileus: a critical review. J Wildl Manage 47:573-582
36. Werren JH, Taylor PD (1984) The effects of population recruitment on sex ratio selection. Am Nat 124:143-148
37. West SA, Godfray HCJ (1997) Sex ratio strategies after perturbation of the stable age distribution. J Theor Biol 186:213-221