R. M. Sadler

The Ecology of Reproduction in Wild and Domestic Mammals (eBook, PDF)

• Format: PDF

Produktbeschreibung

49 about six months ... to well over a year. If there is only one part of the year that is favourable, such as spring and early summer in the temperate climates, then each species must make an evolutionary choice, so to speak, as to which parts of the reproductive cycle - conception, gestation, lactation or weanin- must be protected and which can come in less favourable times of the year. The rhesus and langur monkeys of northern India give birth during the time of year when temperatures are hottest and wells and tanks are often dry. However, gestation and the later months oflactation come during the monsoon season when food and water are abundant. In contrast the east African baboons give birth at the beginning of the small rains, and gestation and the late part of lactation occur during the six months dry season. Whether any pattern of relationship will be found to hold true for other species of primates is still not clear. It may be that a wide variety of patterns have evolved depending on the lengths of gestation and lactation and the particular ecological complex in which each species or even subspecies lives' (pages 503, 504).

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Produktdetails

• Verlag: Springer Netherlands
• Seitenzahl: 336
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9789401165273
• Artikelnr.: 44063601

Inhaltsangabe

One Puberty.- 1. Ecological factors in the attainment of puberty: Introduction.- 2. The effects of light on the onset of puberty.- 3. The effects of temperature on the onset of puberty.- 4. The effects of nutrition on the onset of puberty.- 5. The effects of 'density' and social factors on the onset of puberty.- 6. Delayed puberty.- 7. Miscellaneous factors in the attainment of puberty.- Two The Breeding Season.- 8. Ecological factors and the breeding season: Introduction.- 9. The effects of light on the breeding season.- 10. The effects of temperature on the breeding season.- 11. The effects of rainfall and nutrition on the breeding season.- 12. The effects of minor ecological factors on the breeding season.- Three Pregnancy.- 13. The effects of temperature on pregnancy.- 14. The effects of nutrition on pregnancy.- 15. The variation in litter size.- 16. Delayed implantation.- Four Parturition, Lactation, and Immediate Post-Natal Survival of Young.- 17. The effects of weather from parturition to weaning.- 18. The effects of nutrition from parturition to weaning.- 19. The role of predation in survival to weaning.- 20. The effects of miscellaneous factors from parturition to weaning.- Five 'Density' and Social Factors in Breeding, Pregnancy and Survival to Weaning.- 21. Social factors in adult reproduction: Introduction.- 22. Social factors in adult reproduction in natural populations.- 23. Social factors in adult reproduction in experimental populations.- 24. The relevance of observations from experimental populations to natural populations with regard to the role of social factors in adult reproduction.- Six Human Interference.- 25. The role of humans in the ecology of breeding in mammals.- Taxonomic Index.- General Index.