Collins New Naturalist Library. H. Hewer R.

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СКАЧАТЬ 14-day-old grey seal pup, Ghaoidmeal, Inner Hebrides

       20. Grey seal pup in typical early moult, Scroby Sands, Norfolk (J. Woolston)

       Grey seal bull moulter, Ramsey Island

       21. Two grey seal bulls contesting territory, North Rona

       Grey seals in copulation, Farne Islands (J. C. Coulson)

22. Branded grey seal cow, Farne Islands (J. C. Coulson)

       Grey seals hauled-out on West Hoyle Bank, Cheshire (J. C Gittins)

       23. Common seal cow and pup, the Wash (W. N. Bonner)

       Two common seals (heads), the Wash (W. N. Bonner)

       24. Common seals hauled-out on sandbank, the Wash (W. Vaughan)

       Common seal bull ‘salmon-leaping’, Mousa, Shetland

FIGURES

1. External features of seal and sea-lion

2. Limb-bones of seal and fur-seal

3. Skulls of seals (grey and common) and of sea-lion

4. Side view of pinnipede body

5. Bradycardia in seal, porpoise and manatee

6. Kidneys and posterior vena cava in seals

7. World distribution of the grey seal

8. The origin of the three populations of grey seals

9. Distribution of grey seals in British waters – recorded sightings

10. Distribution of grey seals in British waters – breeding areas

11. External differences between grey and common seals and between bull and cow grey seals

12. Jaws and teeth in grey and common seals

       13. Growth and maturation of the os penis

       14. The os penis index

       15. Distribution by age of cow and bull grey seals

       16. The male genitalia of the grey seal

       17. Growth and maturation of the testis in the grey seal

       18. Variations during the year in adult testicular weights in the grey seal

       19. The female genitalia of the grey seal (adult)

       20. The female genitalia of the grey seal at birth

       21. Foetal growth rate in the grey seal

       22. Counts of grey seals on West Hoyle Bank and on the Farne Islands

       23. Counts of grey seals on West Hoyle Bank, 1951–56 and 1966–70

       24. Early stages in territory formation on Shillay

       25. Daily pupping rates for Ramsey Island, North Rona, Staple Island and Brownsman

       26. Daily pupping rates in neighbouring rookeries

       27. Breeding sites on Ramsey Island

       28. Breeding sites on Eilean nan Ron and Ghaoidmeal

       29. Breeding sites on Shillay

       30. Breeding sites on North Rona

       31. The Outer Farne Islands

       32. Breeding sites on the Farne Islands

       33. Different types of social arrangements in different groups of grey seals

       34. The grey seal pup in the first four weeks

       35. Bull territories on Shillay

       36. Types of marker used on grey seal pups

       37. Recoveries of young marked grey seals

       38. Growth rates in grey seal pups

       39. World distribution of common seals

       40. Distribution of common seals in British waters – recorded sightings

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