A list of our research publications

  1. Bishop, A. M., Onoufriou, J., Moss, S., Pomeroy, P. P., and Twiss, S. D. (2016). Cannibalism by a male grey seal (Halichoerus grypus) in the North Sea. Aquatic Mammals, 42(2), 137-143. dx.doi.org/ 10.1578/ AM.42.2.2016.137
  2. Bishop, A. M., Pomeroy, P., & Twiss, S. D. (2015). Variability in individual rates of aggression in wild gray seals: Fine-scale analysis reveals importance of social and spatial stability. Behavioral Ecology and Sociobiology, 69(10), 1663-1675. doi:http://dx.doi.org/10.1007/s00265-015-1978-x
  3. Bishop, A., Pomeroy, P., and Twiss, S.D. (2015). Breeding male grey seals exhibit similar activity budgets across varying exposures to human activity. Marine Ecology Progress Series, 527:247-259. doi:10.3354/meps11254
  4. Bishop, A. M., Denton, P., Pomeroy, P. P., and Twiss, S.D. (2015). Good vibrations by the beach boys: magnitude of substrate vibrations is a reliable indicator of male grey seal size. Animal Behaviour, 100:74-82. doi:10.1016/j.anbehav.2014.11.008 
  5. Stewart, J. E., Pomeroy, P. P., Duck, C. D. and Twiss, S. D. (2014). Finescale ecological niche modeling provides evidence that lactating gray seals (Halichoerus grypus) prefer access to fresh water in order to drink. Marine Mammal Science. doi: 10.1111/mms.12126.
  6. Bishop, A. M., Lidstone-Scott, R., Pomeroy, P. and Twiss, S. D. (2013). Body slap: An innovative aggressive display by breeding male gray seals (Halichoerus grypus). Marine Mammal Science, 30(2): 579-593. doi: 10.1111/mms.12059.
  7. Hiby, A.R., Paterson, W.D., Redman, P., Watkins, J., Twiss, S.D. and Pomeroy, P.P. (2013). Analysis of photo-id data allowing for missed matches and individuals identified from opposite sidesMethods in Ecology and Evolution, 4: 252-259. doi: 10.1111/2041-210x.12008.
  8. Twiss S.D., Cairns C., Culloch R.M., Richards S.A. and Pomeroy, P.P. (2012). Variation in female grey seal (Halichoerus grypus) reproductive performance correlates to proactive-reactive behavioural types. PLoS ONE7(11): e49598. doi:10.1371/journal.pone.0049598.
  9. Culloch, R.M., Pomeroy, P., Lidstone-Scott, R., Bourne, L. and Twiss, S.D. (2012). Observations from video footage of red fox (Vulpes vulpes) activity within a grey seal (Halichoerus grypus) breeding colony on the UK mainland. Aquatic Mammals38(1): 81-85, doi: 10.1578/AM.38.1.2012.81.
  10. Twiss, S.D., Culloch, R. and Pomeroy, P.P. (2011). An in-field experimental test of pinniped behavioral types. Marine Mammal Science28(3): e280–e294. doi: 10.1111/j.1748-7692.2011.00523.x.
  11. Twiss, S.D. and Franklin, J. (2010). Individually consistent behavioural patterns in wild, breeding male grey seals (Halichoerus grypus). Aquatic Mammals36: 234-238, doi:10.1578/AM.36.3.2010.234.
  12. Ruddell, S.J.S., Twiss, S.D. and Pomeroy, P.P. (2007). Measuring opportunity for sociality: quantifying social stability in a colonially breeding phocid.  Animal Behaviour74(5): 1357-1368, doi: 10.1016/j.anbehav.2007.01.024.
  13. Twiss, S.D., Thomas, C.J., Poland, V.F., Graves, J.A. and Pomeroy, P.P. (2006). The impact of climatic variation on the opportunity for sexual selection. Biology Letters, 3(1): 12-15. doi: 10.1098/rsbl.2006.0559.
  14. Twiss, S.D., Pomeroy, P.P., Graves, J.A. and Poland, V.F. (2006). Finding fathers: spatio-temporal analysis of paternity assignment in grey seals (Halichoerus grypus). Molecular Ecology15: 1939-1953. doi: 10.1111/j.1365-294X.2006.02927.
  15. Pomeroy, P., Smout, S., Twiss, S., Moss, S. and King, R. (2009). Evidence of delayed recruitment at UK grey seal breeding colonies.  Journal of Northwest Atlantic Fisheries Organisation42: 125–133.
  16. Poland, V.F., Pomeroy, P.P., Twiss, S.D. and Graves, J.A. (2008). Fine-scale study finds limited evidence of kin clustering in a gray seal colony. Marine Mammal Science24(2): 371-387. doi: 10.1111/j.1748-7692.2008.00191.x.
  17. Pomeroy, P.P., Redman, P.R., Ruddell, S.J.S.,  Duck, C.D. and Twiss, S.D. (2005). Breeding site choice fails to explain interannual associations of female grey seals. Behavioural Ecology and Sociobiology57: 546-556. doi: 10.1007/s00265-004-0882-6.
  18. Bean, K., Amos, W., Pomeroy, P.P., Twiss, S.D., Coulson, T.N. and Boyd, I.L. (2004). Patterns of parental relatedness and pup survival in the grey seal (Halichoerus grypus). Molecular Ecology, 13: 2365-2370. doi: 10.1111/j.1365-294X.2004.02199.x.
  19. Twiss, S.D., Duck, C. and Pomeroy, P.P. (2003). Grey seal (Halichoerus grypus) pup mortality not explained by local breeding density on North Rona, Scotland. Journal of Zoology259: 83-91. doi: 10.1017/S0952836902003035.
  20. Twiss , S.D., Wright,  N.C., Dunstone, N., Redman, P., Moss, S. and Pomeroy, P.P. (2002). Behavioral evidence of thermal stress from over-heating in UK breeding gray seals. Marine Mammal Science18(2): 455-468. doi: 10.1111/j.1748-7692.2002.tb01048.x.
  21. Twiss, S.D., Thomas, C.J. and Pomeroy, P.P. (2001). Topographic spatial characterisation of grey seal Halichoerus grypus breeding habitat at a seal’s perceptual spatial grain. Ecography, 24: 257-266. doi: 10.1034/j.1600-0587.2001.240303.x.
  22. Redman, P., Pomeroy, P.P. and Twiss, S.D. (2001).  Grey seal maternal attendance patterns are affected by water availability on North Rona, Scotland. Canadian Journal of Zoology, 79: 1073-1079. doi: 10.1139/z01-081.
  23. Pomeroy, P.P., Worthington-Wilmer, J., Amos, W. and Twiss, S.D. (2001). Reproductive performance links to fine scale spatial patterns of female grey seal relatedness. Proceedings of the Royal Society of London, B, 268: 711-717. doi: 10.1098/rspb.2000.1422.
  24. Twiss, S.D., Caudron, A., Pomeroy, P.P., Thomas, C.J. and Mills, J.P. (2000a). Fine scale topographical correlates of behavioural investment in offspring by female grey seals, Halichoerus grypusAnimal Behaviour, 59(2): 327-338. doi: 10.1006/anbe.1999.1320.
  25. Twiss, S.D., Pomeroy, P.P., Thomas, C.J. and Mills, J.P. (2000b). Remote estimation of grey seal length, width and body mass from aerial photography – comparison between breeding colonies. Photogrammetric Engineering and Remote Sensing66(7): 859-866.
  26. Pomeroy, P.P., Twiss, S.D. and Duck, C.D. (2000a)Expansion of a grey seal (Halichoerus grypus) breeding colony: change in pupping site use at the Isle of May, Scotland. Journal of Zoology, 250: 1-12. doi: 10.1111/j.1469-7998.2000.tb00573.x.
  27. Pomeroy, P.P., Twiss, S.D. and Redman, P. (2000b). Philopatry, site fidelity and local kin associations within grey seal breeding colonies. Ethology, 106: 899-919. doi: 10.1046/j.1439-0310.2000.00610.x.
  28. Worthington-Wilmer, J., Overall, A.J., Pomeroy, P.P., Twiss, S.D. and Amos, W. (2000). Patterns of paternal relatedness in British grey seal colonies. Molecular Ecology9: 283-292. doi: 10.1046/j.1365-294x.2000.00872.x.
  29. Twiss, S.D. and Thomas, C.J. (1999)Fine scale topographical influences on Environmental Potential for Polygamy (EPP) and male reproductive success in grey seals. Pp. 191-195. In: European Research on Cetaceans-13. Eds. P.G.H. Evans, J.A. Raga, and J. Cruz. European Cetacean Society, Valencia, Spain. 484pp.
  30. Worthington-Wilmer, J., Allen, P.J., Pomeroy, P.P., Twiss, S.D. and Amos, W. (1999). Where have all the fathers gone? An extensive microsatellite analysis of paternity in the grey seal (Halichoerus grypus). Molecular Ecology, 8(9): 1417-1429. doi: 10.1046/j.1365-294x.1999.00705.x.
  31. Twiss, S.D., Anderson, S.S. and Monaghan, P. (1998).Limited intra-specific variation in male grey seal (Halichoerus grypus) dominance relationships in relation to variation in male mating success and female availability. Journal of Zoology, 246: 259-267. doi: 10.1111/j.1469-7998.1998.tb00156.x.
  32. Mills, J.P., Newton, I. and Twiss, S.D. (1997). Photogrammetry from archived digital imagery for seal monitoring. The Photogrammetric Record, 15(89): 715-724. doi: 10.1111/0031-868X.00080.
  33. Amos, B., Twiss, S., Pomeroy, P. and Anderson, S. (1995). Evidence for mate fidelity in the gray seal. Science, 268:1897-1899. doi: 10.1126/science.268.5219.1897.
  34. Allen, P.J., Amos, W.A., Pomeroy, P.P. and Twiss, S.D. (1995)Microsatellite variation in grey seals (Halichoerus grypus) shows evidence of genetic differentiation between two British breeding colonies. Molecular Ecology, 4: 653-662. doi: 10.1111/j.1365-294X.1995.tb00266.x.
  35. Twiss, S.D., Pomeroy, P.P. and Anderson, S.S. (1994)Dispersion and site fidelity of breeding male grey seals (Halichoerus grypus) on North Rona, Scotland. Journal of Zoology, 233: 683-693. doi: 10.1111/j.1469-7998.1994.tb05374.x.
  36. Pomeroy, P.P., Anderson, S.S., Twiss, S.D. and McConnell, B.J. (1994)Dispersion and site fidelity of breeding female grey seals (Halichoerus grypus) on North Rona, Scotland. Journal of Zoology, 233: 429-447. doi: 10.1111/j.1469-7998.1994.tb05275.x.
  37. Amos, B., Twiss, S., Pomeroy, P. and Anderson, S. (1993).Male mating success and paternity in the grey seal, Halichoerus grypus: a study using DNA fingerprinting. Proceedings of the Royal Society of London, B., 252: 199-207. doi: 10.1098/rspb.1993.0066.



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