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Dr Sian Griffiths
- Siarad Cymraeg
Timau a rolau for Sian Griffiths
Darllenydd; Amgylchiadau Lliniarol y Gadeirydd. (Addysgu ac Ysgolheictod)
Ysgol y Biowyddorau
Trosolwg
Cadeirydd, Grŵp Amgylchiadau Esgusodol Israddedig
Rwy'n croesawu ymholiadau gan fyfyrwyr neu staff am Amgylchiadau Esgusodol neu Darfu ar Astudiaethau. Rwy'n darparu arweiniad ar y cymorth sydd ar gael pan fydd anawsterau'n codi, ac i esbonio'r goblygiadau ar gyfer astudiaethau academaidd. Mae manylion llawn polisïau'r Brifysgol ar gael yma: EC ac IoS.
Trosolwg ymchwil
Mae fy ymchwil yn canolbwyntio ar y themâu canlynol mewn ecoleg dyfrol, sy'n cysylltu ymchwil sylfaenol â phroblemau ymarferol a wynebir gan fiolegwyr a rheolwyr cadwraeth. Mae'r gwaith yn defnyddio amrywiaeth o offer ymddygiadol ac ecolegol ac yn ymchwilio i'r rhyngweithio rhwng ymddygiad unigol a phrosesau poblogaeth sy'n hanfodol ar gyfer deall a gwarchod bioamrywiaeth naturiol.
- Ecoleg ymddygiadol ac esblygiad addysg pysgod
- Canlyniadau newid hinsawdd i ymddygiad pysgod ac ecoleg afonydd
- Ansawdd yr ecosystem a dosbarthiad pysgod mewn afonydd
Mae pob thema yn cael ei ehangu o dan 'Ymchwil' uchod ac amlygir gwaith cydweithredol gydag amrywiol asiantaethau.
Cyhoeddiad
2021
- Muhawenimana, V. et al. 2021. Temperature surpasses the effects of velocity and turbulence on swimming performance of two invasive non-native fish species. Royal Society Open Science 8 (2) 201516. (10.1098/rsos.201516)
2020
- Thomas, J. R. et al. 2020. Crayfish plague affects juvenile survival and adult behaviour of invasive signal crayfish. Parasitology 147 (6), pp.706-714. (10.1017/S0031182020000165)
2019
- Thomas, J. R. et al. 2019. Terrestrial emigration behaviour of two invasive crayfish species. Behavioural Processes 167 103917. (10.1016/j.beproc.2019.103917)
2018
- Thomas, J. R. et al. 2018. Terrestrial dispersal of invasive signal crayfish during vulnerable life stages. Behavioural Processes 157 , pp.204-207. (10.1016/j.beproc.2018.09.014)
- Parry, E. et al. 2018. The effects of flow on Atlantic salmon (Salmo salar) redd distribution in a UK chalk stream between 1980 and 2015. Ecology of Freshwater Fish 27 (1), pp.128-137. (10.1111/eff.12330)
2017
- Fernandes, W. P. A. et al., 2017. Relatedness and body size influence territorial behaviour in Salmo salar juveniles in the wild. Fisheries Management and Ecology 24 (4), pp.347-351. (10.1111/fme.12234)
2016
- Thomas, J. R. et al. 2016. The impact of streetlights on an aquatic invasive species: artificial light at night alters signal crayfish behaviour. Applied Animal Behaviour Science 176 , pp.143-149. (10.1016/j.applanim.2015.11.020)
- Thomas, S. M. , Griffiths, S. W. and Ormerod, S. J. 2016. Beyond cool: adapting upland streams for climate change using riparian woodlands. Global Change Biology 22 (1), pp.310-324. (10.1111/gcb.13103)
2015
- Fernandes, W. P. A. et al., 2015. Does relatedness influence migratory timing and behaviour in Atlantic salmon smolts?. Animal Behaviour 106 , pp.191-199. (10.1016/j.anbehav.2015.06.006)
- Newman, R. C. et al. 2015. Using novel methodologies to examine the impact of artificial light at night on the cortisol stress response in dispersing Atlantic salmon (Salmo salarL.) fry. Conservation Physiology 3 (1) cov051. (10.1093/conphys/cov051)
- Thomas, S. M. , Griffiths, S. W. and Ormerod, S. J. 2015. Adapting streams for climate change using riparian broadleaf trees and its consequences for stream salmonids. Freshwater Biology 60 (1), pp.64-77. (10.1111/fwb.12467)
- Fernandes, W. P. A. et al., 2015. The role of density and relatedness in wild juvenile Atlantic salmon growth. Journal of Zoology 295 (1), pp.56-64. (10.1111/jzo.12188)
2014
- Griffiths, S. W. et al. 2014. Sexual segregation in monomorphic minnows. Animal Behaviour 88 , pp.7-12. (10.1016/j.anbehav.2013.11.014)
2012
- Burnard, D. et al., 2012. Chemically-mediated sexual display postures in pre-ovulatory female topmouth gudgeon, Pseudorasbora parva. Behaviour 149 (9), pp.1003-1018. (10.1163/1568539X-00003024)
2010
- Andreou, D. et al. 2010. Influence of host reproductive state on Sphaerothecum destruens prevalence and infection level. Parasitology 138 (1), pp.26-34. (10.1017/S0031182010000983)
- Milinski, M. et al., 2010. Costly major histocompatibility complex signals produced only by reproductively active males, but not females, must be validated by a 'maleness signal' in three-spind sticklebacks. Proceedings of the Royal Society B-Biological Sciences 277 (1680), pp.391-398. (10.1098/rspb.2009.1501)
- Orpwood, J. E. , Armstrong, J. D. and Griffiths, S. W. 2010. Interactions between riparian shading and food supply: a seasonal comparison of effects on time budgets, space use and growth in Atlantic salmon Salmo salar. Journal of Fish Biology 77 (8), pp.1835-1849. (10.1111/j.1095-8649.2010.02760.x)
- Williams, K. L. et al. 2010. Deposition of Atlantic salmon Salmo salar carcasses in a Scottish upland catchment. Journal of Fish Biology 77 (4), pp.927-934. (10.1111/j.1095-8649.2010.02725.x)
2009
- Williams, K. L. et al., 2009. Response of juvenile Atlantic salmon, Salmo salar, to the introduction of salmon carcasses in upland streams. Fisheries Management and Ecology 16 (4), pp.290-297. (10.1111/j.1365-2400.2009.00673.x)
2008
- Burnard, D. , Gozlan, R. E. and Griffiths, S. W. 2008. The role of pheromones in freshwater fishes. Journal of Fish Biology 73 (1), pp.1-16. (10.1111/j.1095-8649.2008.01872.x)
- Orpwood, J. E. et al. 2008. Minnows and the selfish herd: effects of predation risk on shoaling behaviour are dependent on habitat complexity. Animal Behaviour 76 (1), pp.143-152. (10.1016/j.anbehav.2008.01.016)
- Stradmeyer, L. et al., 2008. Competition between brown trout and Atlantic salmon parr over pool refuges during rapid dewatering. Journal of Fish Biology 72 (4), pp.848-860. (10.1111/j.1095-8649.2007.01767.x)
2007
- Griffiths, S. W. et al. 2007. Familiarity-biased patterns of association shift with time among European minnows. Journal of Fish Biology 71 (6), pp.1602-1612. (10.1111/j.1095-8649.2007.01626.x)
- Jager, I. et al., 2007. Individual MHC class I and MHC class IIB diversities are associated with male and female reproductive traits in the three-spined stickleback. Journal of Evolutionary Biology 20 (5), pp.2005-2015. (10.1111/j.1420-9101.2007.01366.x)
2006
- Orpwood, J. E. , Griffiths, S. W. and Armstrong, J. D. 2006. Effects of food availability on temporal activity patterns and growth of Atlantic salmon. Journal of Animal Ecology 75 (3), pp.677. (10.1111/j.1365-2656.2006.01088.x)
2005
- Hojesjo, J. , Armstrong, J. D. and Griffiths, S. W. 2005. Sneaky feeding by salmon in sympatry with dominant brown trout. Animal Behaviour 69 (5), pp.1037-1041. (10.1016/j.anbehav.2004.09.007)
- Milinski, M. et al., 2005. Mate choice decisions of stickleback females predictably modified by MHC peptide ligands. Proceedings of the National Academy of Sciences of the USA , pp.4414-4418. (10.1073/pnas.0408264102)
2004
- Griffiths, S. W. et al. 2004. Coping with divided attention: the advantage of familiarity. Proceedings of the Royal Society London , pp.695-699. (10.1098/rspb.2003.2648)
- Griffiths, S. W. , Collen, P. and Armstrong, J. D. 2004. Competition for shelter among over-wintering signal crayfish and juvenile Atlantic salmon. Journal of Fish Biology 65 (2), pp.436-447. (10.1111/j.0022-1112.2004.00460.x)
2003
- Griffiths, S. W. , Armstrong, J. D. and Metcalfe, N. B. 2003. The cost of aggregation: juvenile salmon avoid sharing winter refuges with siblings. Behavioral Ecology , pp.602-606. (10.1093/beheco/arg050)
- Griffiths, S. W. 2003. Learned recognition of conspecifics by fishes. Fish and Fisheries 4 (3), pp.256-268. (10.1046/j.1467-2979.2003.00129.x)
- Harwood, A. J. et al., 2003. The relative influence of prior residency and dominance on the early feeding behaviour of juvenile Atlantic salmon. Animal Behaviour 65 (6), pp.1141-1149. (10.1006/anbe.2003.2125)
- Harwood, A. J. et al., 2003. Does dominance status correlate with growth in wild stream-dwelling Atlantic salmon (Salmo salar)?. Behavioral Ecology 14 (6), pp.902-908. (10.1093/beheco/arg080)
- Orpwood, J. E. , Griffiths, S. W. and Armstrong, J. D. 2003. Effects of body size on sympatric shelter use in over-wintering juvenile salmonids. Journal of Fish Biology 63 (Supp 1), pp.166-173. (10.1111/j.1095-8649.2003.00206.x)
2002
- Griffiths, S. W. and Armstrong, J. D. 2002. Kin-biased territory overlap and food sharing among Atlantic salmon juveniles. Journal of Animal Ecology , pp.480-486. (10.1046/j.1365-2656.2002.00614.x)
- Griffiths, S. W. and Armstrong, J. D. 2002. Rearing conditions influence refuge use among over-wintering Atlantic salmon juveniles. Journal of Fish Biology 60 (2), pp.363-369. (10.1006/jfbi.2001.1846)
- Harwood, A. J. et al., 2002. Sympatric association influences within-species dominance relations among juvenile Atlantic salmon and brown trout. Animal Behaviour 64 (1), pp.85-95. (10.1006/anbe.2002.3039)
- Harwood, A. J. et al., 2002. Intra- and inter-specific competition for winter concealment habitat in juvenile salmonids. Canadian Journal of Fisheries and Aquatic Sciences 59 (9), pp.1515-1523. (10.1139/f02-119)
2001
- Griffiths, S. W. and Armstrong, J. D. 2001. The benefits of genetic diversity outweigh those of kin association in a territorial animal. Proceedings of the Royal Society B: Biological Sciences 268 (1473), pp.1293-1296. (10.1098/rspb.2001.1660)
- Armstrong, J. D. and Griffiths, S. W. 2001. Density-dependent refuge use among over-wintering wild Atlantic salmon juveniles. Journal of Fish Biology 58 (6), pp.1524-1530. (10.1006/jfbi.2001.1554)
- Harwood, A. J. et al., 2001. Spatial and temporal effects of interspecific competition between Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in winter. Canadian Journal of Fisheries and Aquatic Sciences 58 (6), pp.1133-1140. (10.1139/cjfas-58-6-1133)
2000
- Griffiths, S. W. and Armstrong, J. 2000. Differential responses of kin and nonkin salmon to patterns of water flow: does recirculation influence aggression?. Animal Behaviour 59 (5), pp.1019-1023. (10.1006/anbe.2000.1393)
1999
- Griffiths, S. W. and Magurran, A. E. 1999. Schooling decisions in guppies ( Poecilia reticulata ) are based on familiarity rather than kin recognition by phenotype matching. Behavioral Ecology and Sociobiology 45 (6), pp.437-443. (10.1007/s002650050582)
1998
- Griffiths, S. and Magurran, A. 1998. Sex and schooling behaviour in the Trinidadian guppy. Animal Behaviour 56 (3), pp.689-693. (10.1006/anbe.1998.0767)
- Garner, P. et al., 1998. Use of shallow marginal habitat by Phoxinus phoxinus: a trade-off between temperature and food?. Journal of Fish Biology 52 (3), pp.600-609. (10.1111/j.1095-8649.1998.tb02020.x)
1997
- Griffiths, S. 1997. Preferences for familiar fish do not vary with predation risk in the European minnow. Journal of Fish Biology 51 (3), pp.489-495. (10.1111/j.1095-8649.1997.tb01506.x)
- Griffiths, S. W. and Magurran, A. E. 1997. Familiarity in schooling fish: how long does it take to acquire?. Animal Behaviour 53 (5), pp.945-949. (10.1006/anbe.1996.0315)
- Griffiths, S. W. and Magurran, A. E. 1997. Schooling preferences for familiar fish vary with group size in a wild guppy population. Proceedings of the Royal Society B: Biological Sciences 264 (1381), pp.547-551. (10.1098/rspb.1997.0078)
1996
- Griffiths, S. W. 1996. Sex differences in the trade-off between feeding and mating in the guppy. Journal of Fish Biology 48 (5), pp.891-898. (10.1111/j.1095-8649.1996.tb01484.x)
Articles
- Muhawenimana, V. et al. 2021. Temperature surpasses the effects of velocity and turbulence on swimming performance of two invasive non-native fish species. Royal Society Open Science 8 (2) 201516. (10.1098/rsos.201516)
- Thomas, J. R. et al. 2020. Crayfish plague affects juvenile survival and adult behaviour of invasive signal crayfish. Parasitology 147 (6), pp.706-714. (10.1017/S0031182020000165)
- Thomas, J. R. et al. 2019. Terrestrial emigration behaviour of two invasive crayfish species. Behavioural Processes 167 103917. (10.1016/j.beproc.2019.103917)
- Thomas, J. R. et al. 2018. Terrestrial dispersal of invasive signal crayfish during vulnerable life stages. Behavioural Processes 157 , pp.204-207. (10.1016/j.beproc.2018.09.014)
- Parry, E. et al. 2018. The effects of flow on Atlantic salmon (Salmo salar) redd distribution in a UK chalk stream between 1980 and 2015. Ecology of Freshwater Fish 27 (1), pp.128-137. (10.1111/eff.12330)
- Fernandes, W. P. A. et al., 2017. Relatedness and body size influence territorial behaviour in Salmo salar juveniles in the wild. Fisheries Management and Ecology 24 (4), pp.347-351. (10.1111/fme.12234)
- Thomas, J. R. et al. 2016. The impact of streetlights on an aquatic invasive species: artificial light at night alters signal crayfish behaviour. Applied Animal Behaviour Science 176 , pp.143-149. (10.1016/j.applanim.2015.11.020)
- Thomas, S. M. , Griffiths, S. W. and Ormerod, S. J. 2016. Beyond cool: adapting upland streams for climate change using riparian woodlands. Global Change Biology 22 (1), pp.310-324. (10.1111/gcb.13103)
- Fernandes, W. P. A. et al., 2015. Does relatedness influence migratory timing and behaviour in Atlantic salmon smolts?. Animal Behaviour 106 , pp.191-199. (10.1016/j.anbehav.2015.06.006)
- Newman, R. C. et al. 2015. Using novel methodologies to examine the impact of artificial light at night on the cortisol stress response in dispersing Atlantic salmon (Salmo salarL.) fry. Conservation Physiology 3 (1) cov051. (10.1093/conphys/cov051)
- Thomas, S. M. , Griffiths, S. W. and Ormerod, S. J. 2015. Adapting streams for climate change using riparian broadleaf trees and its consequences for stream salmonids. Freshwater Biology 60 (1), pp.64-77. (10.1111/fwb.12467)
- Fernandes, W. P. A. et al., 2015. The role of density and relatedness in wild juvenile Atlantic salmon growth. Journal of Zoology 295 (1), pp.56-64. (10.1111/jzo.12188)
- Griffiths, S. W. et al. 2014. Sexual segregation in monomorphic minnows. Animal Behaviour 88 , pp.7-12. (10.1016/j.anbehav.2013.11.014)
- Burnard, D. et al., 2012. Chemically-mediated sexual display postures in pre-ovulatory female topmouth gudgeon, Pseudorasbora parva. Behaviour 149 (9), pp.1003-1018. (10.1163/1568539X-00003024)
- Andreou, D. et al. 2010. Influence of host reproductive state on Sphaerothecum destruens prevalence and infection level. Parasitology 138 (1), pp.26-34. (10.1017/S0031182010000983)
- Milinski, M. et al., 2010. Costly major histocompatibility complex signals produced only by reproductively active males, but not females, must be validated by a 'maleness signal' in three-spind sticklebacks. Proceedings of the Royal Society B-Biological Sciences 277 (1680), pp.391-398. (10.1098/rspb.2009.1501)
- Orpwood, J. E. , Armstrong, J. D. and Griffiths, S. W. 2010. Interactions between riparian shading and food supply: a seasonal comparison of effects on time budgets, space use and growth in Atlantic salmon Salmo salar. Journal of Fish Biology 77 (8), pp.1835-1849. (10.1111/j.1095-8649.2010.02760.x)
- Williams, K. L. et al. 2010. Deposition of Atlantic salmon Salmo salar carcasses in a Scottish upland catchment. Journal of Fish Biology 77 (4), pp.927-934. (10.1111/j.1095-8649.2010.02725.x)
- Williams, K. L. et al., 2009. Response of juvenile Atlantic salmon, Salmo salar, to the introduction of salmon carcasses in upland streams. Fisheries Management and Ecology 16 (4), pp.290-297. (10.1111/j.1365-2400.2009.00673.x)
- Burnard, D. , Gozlan, R. E. and Griffiths, S. W. 2008. The role of pheromones in freshwater fishes. Journal of Fish Biology 73 (1), pp.1-16. (10.1111/j.1095-8649.2008.01872.x)
- Orpwood, J. E. et al. 2008. Minnows and the selfish herd: effects of predation risk on shoaling behaviour are dependent on habitat complexity. Animal Behaviour 76 (1), pp.143-152. (10.1016/j.anbehav.2008.01.016)
- Stradmeyer, L. et al., 2008. Competition between brown trout and Atlantic salmon parr over pool refuges during rapid dewatering. Journal of Fish Biology 72 (4), pp.848-860. (10.1111/j.1095-8649.2007.01767.x)
- Griffiths, S. W. et al. 2007. Familiarity-biased patterns of association shift with time among European minnows. Journal of Fish Biology 71 (6), pp.1602-1612. (10.1111/j.1095-8649.2007.01626.x)
- Jager, I. et al., 2007. Individual MHC class I and MHC class IIB diversities are associated with male and female reproductive traits in the three-spined stickleback. Journal of Evolutionary Biology 20 (5), pp.2005-2015. (10.1111/j.1420-9101.2007.01366.x)
- Orpwood, J. E. , Griffiths, S. W. and Armstrong, J. D. 2006. Effects of food availability on temporal activity patterns and growth of Atlantic salmon. Journal of Animal Ecology 75 (3), pp.677. (10.1111/j.1365-2656.2006.01088.x)
- Hojesjo, J. , Armstrong, J. D. and Griffiths, S. W. 2005. Sneaky feeding by salmon in sympatry with dominant brown trout. Animal Behaviour 69 (5), pp.1037-1041. (10.1016/j.anbehav.2004.09.007)
- Milinski, M. et al., 2005. Mate choice decisions of stickleback females predictably modified by MHC peptide ligands. Proceedings of the National Academy of Sciences of the USA , pp.4414-4418. (10.1073/pnas.0408264102)
- Griffiths, S. W. et al. 2004. Coping with divided attention: the advantage of familiarity. Proceedings of the Royal Society London , pp.695-699. (10.1098/rspb.2003.2648)
- Griffiths, S. W. , Collen, P. and Armstrong, J. D. 2004. Competition for shelter among over-wintering signal crayfish and juvenile Atlantic salmon. Journal of Fish Biology 65 (2), pp.436-447. (10.1111/j.0022-1112.2004.00460.x)
- Griffiths, S. W. , Armstrong, J. D. and Metcalfe, N. B. 2003. The cost of aggregation: juvenile salmon avoid sharing winter refuges with siblings. Behavioral Ecology , pp.602-606. (10.1093/beheco/arg050)
- Griffiths, S. W. 2003. Learned recognition of conspecifics by fishes. Fish and Fisheries 4 (3), pp.256-268. (10.1046/j.1467-2979.2003.00129.x)
- Harwood, A. J. et al., 2003. The relative influence of prior residency and dominance on the early feeding behaviour of juvenile Atlantic salmon. Animal Behaviour 65 (6), pp.1141-1149. (10.1006/anbe.2003.2125)
- Harwood, A. J. et al., 2003. Does dominance status correlate with growth in wild stream-dwelling Atlantic salmon (Salmo salar)?. Behavioral Ecology 14 (6), pp.902-908. (10.1093/beheco/arg080)
- Orpwood, J. E. , Griffiths, S. W. and Armstrong, J. D. 2003. Effects of body size on sympatric shelter use in over-wintering juvenile salmonids. Journal of Fish Biology 63 (Supp 1), pp.166-173. (10.1111/j.1095-8649.2003.00206.x)
- Griffiths, S. W. and Armstrong, J. D. 2002. Kin-biased territory overlap and food sharing among Atlantic salmon juveniles. Journal of Animal Ecology , pp.480-486. (10.1046/j.1365-2656.2002.00614.x)
- Griffiths, S. W. and Armstrong, J. D. 2002. Rearing conditions influence refuge use among over-wintering Atlantic salmon juveniles. Journal of Fish Biology 60 (2), pp.363-369. (10.1006/jfbi.2001.1846)
- Harwood, A. J. et al., 2002. Sympatric association influences within-species dominance relations among juvenile Atlantic salmon and brown trout. Animal Behaviour 64 (1), pp.85-95. (10.1006/anbe.2002.3039)
- Harwood, A. J. et al., 2002. Intra- and inter-specific competition for winter concealment habitat in juvenile salmonids. Canadian Journal of Fisheries and Aquatic Sciences 59 (9), pp.1515-1523. (10.1139/f02-119)
- Griffiths, S. W. and Armstrong, J. D. 2001. The benefits of genetic diversity outweigh those of kin association in a territorial animal. Proceedings of the Royal Society B: Biological Sciences 268 (1473), pp.1293-1296. (10.1098/rspb.2001.1660)
- Armstrong, J. D. and Griffiths, S. W. 2001. Density-dependent refuge use among over-wintering wild Atlantic salmon juveniles. Journal of Fish Biology 58 (6), pp.1524-1530. (10.1006/jfbi.2001.1554)
- Harwood, A. J. et al., 2001. Spatial and temporal effects of interspecific competition between Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in winter. Canadian Journal of Fisheries and Aquatic Sciences 58 (6), pp.1133-1140. (10.1139/cjfas-58-6-1133)
- Griffiths, S. W. and Armstrong, J. 2000. Differential responses of kin and nonkin salmon to patterns of water flow: does recirculation influence aggression?. Animal Behaviour 59 (5), pp.1019-1023. (10.1006/anbe.2000.1393)
- Griffiths, S. W. and Magurran, A. E. 1999. Schooling decisions in guppies ( Poecilia reticulata ) are based on familiarity rather than kin recognition by phenotype matching. Behavioral Ecology and Sociobiology 45 (6), pp.437-443. (10.1007/s002650050582)
- Griffiths, S. and Magurran, A. 1998. Sex and schooling behaviour in the Trinidadian guppy. Animal Behaviour 56 (3), pp.689-693. (10.1006/anbe.1998.0767)
- Garner, P. et al., 1998. Use of shallow marginal habitat by Phoxinus phoxinus: a trade-off between temperature and food?. Journal of Fish Biology 52 (3), pp.600-609. (10.1111/j.1095-8649.1998.tb02020.x)
- Griffiths, S. 1997. Preferences for familiar fish do not vary with predation risk in the European minnow. Journal of Fish Biology 51 (3), pp.489-495. (10.1111/j.1095-8649.1997.tb01506.x)
- Griffiths, S. W. and Magurran, A. E. 1997. Familiarity in schooling fish: how long does it take to acquire?. Animal Behaviour 53 (5), pp.945-949. (10.1006/anbe.1996.0315)
- Griffiths, S. W. and Magurran, A. E. 1997. Schooling preferences for familiar fish vary with group size in a wild guppy population. Proceedings of the Royal Society B: Biological Sciences 264 (1381), pp.547-551. (10.1098/rspb.1997.0078)
- Griffiths, S. W. 1996. Sex differences in the trade-off between feeding and mating in the guppy. Journal of Fish Biology 48 (5), pp.891-898. (10.1111/j.1095-8649.1996.tb01484.x)
Ymchwil
Ecoleg ymddygiadol ac esblygiad addysg pysgod
Mae'r thema ymchwil hon yn mynd i'r afael â chwestiwn allweddol mewn ymddygiad anifeiliaid ac esblygiad bywyd cymdeithasol: sut mae anifeiliaid yn penderfynu pa grŵp i ymuno ag ef. Felly, mae'n cysylltu paramedrau ymddygiadol pwysig ag ecoleg a chadwraeth pysgod gwyllt. Mae gwaith ar y cyd â'r Athro A. Magurran (Prifysgol St Andrews) a Dr John Armstrong (Marine Scotland Science, Freshwater Laboratory, Pitlochry),
Canlyniadau newid hinsawdd i ecoleg salmonid
Mae newid yn yr hinsawdd yn cael effeithiau mawr ar batrymau dosbarthu a chyfansoddiad cymunedol organeddau afonydd ac rydym yn profi sut mae gwella cynefinoedd yn afonydd S. Cymru, er enghraifft, cynnal ac adfer coed llydanddail yn y parth torlannol, yn cynyddu gwytnwch eogiaid yr Iwerydd i newid yn yr hinsawdd. Mae'r gwaith hwn yn gydweithrediad sydd â chysylltiad cryf â diddordebau ymchwil yr Athro Steve Ormerod, aelod arall o'r OnE (Is-adran Ymchwil Organebau a'r Amgylchedd) a Dr. Isabelle Durance (Sefydliad Ymchwil Mannau Cynaliadwy), yn ogystal â chydweithwyr allanol (Cyfoeth Naturiol Cymru, Ymddiriedolaeth Afonydd De Ddwyrain Cymru a'r Game and Wildlife Conservation Trust).
Mae gwaith arall yn y DU yn mabwysiadu dull ymddygiadol, gan archwilio cyllidebau amser eogiaid yr Iwerydd, defnyddio gofod (gan gynnwys ymddygiad cysgodol) a thwf, yn y gwyllt ac mewn nentydd dan do ac artiffisial, i ymchwilio i effeithiau lliniaru cysgodi afonol ar ecoleg eogiaid. Mae ymddygiad cysgodol pysgod yn ddiddordeb parhaus. Mae llawer o bysgod, gan gynnwys eog yr Iwerydd, yn nosol ar dymheredd oer (yn cysgodi mewn cynefinoedd rhyngsefydlog yn ystod golau dydd ac yn dod i'r amlwg i chwilota yn y nos). Mae ffactorau sy'n dylanwadu ar gysgodi, gan gynnwys tymheredd y dŵr, amodau golau (e.e. goleuadau stryd artiffisial) a chystadleuaeth o rywogaethau ymledol yn cael effeithiau pwysig a ragwelir ar oroesi trwy fwyta bwyd, twf ac osgoi ysglyfaethwyr. Mae ymchwil ar effaith goleuadau stryd artiffisial ar ecoleg dyfrol yn cael ei gynnal mewn cydweithrediad â Dr Bill Riley yn CEFAS (Canolfan yr Amgylchedd, Pysgodfeydd a Gwyddoniaeth Dyframaeth), Lowestoft.
Ansawdd yr ecosystem a dosbarthiad pysgod mewn afonydd
Gall y gwasanaethau a ddarperir gan nentydd ac afonydd, gan gynnwys darparu pysgod sy'n werthfawr yn economaidd ac yn ddiwylliannol, gael eu peryglu gan effeithiau newid hinsawdd yn y dyfodol ar argaeledd a thymheredd dŵr, ar y cyd â phwysau anthropogenig eraill fel tynnu dŵr. Mae gwaith a wneir fel rhan o gonsortiwm DURESS (Amrywiaeth mewn Afonydd yr Ucheldir ar gyfer Cynaliadwyedd Gwasanaeth Ecosystemau) yn profi'r rhagdybiaeth bod bioamrywiaeth yn ganolog i ddarparu gwasanaethau ecosystem afonydd yr ucheldir yn gynaliadwy o dan newid defnydd tir a hinsawdd (www.nerc-duress.org). Mae gwaith arall, mewn cydweithrediad â Dr Isabelle Durance (Sefydliad Ymchwil Dŵr) a Dr Hefin Jones (OnE), yn ymchwilio i'r mecanweithiau sy'n cynnal poblogaethau pysgod mewn cyfundrefnau llif amrywiol.
Mae noddwyr gwaith cyfredol a diweddar yn cynnwys:
- Afonydd Cymru
- Canolfan yr Amgylchedd, Pysgodfeydd a Gwyddoniaeth Dyframaethu
- Christine Baltzer Parks Sefydliad Amgylcheddol
- Coleg Cymraeg Cenedlaethol
- Ecoexplore
- Ymddiriedolaeth Cadwraeth Gêm a Bywyd Gwyllt
- Ysgoloriaethau Sgiliau Economi Gwybodaeth
- Cymrodoriaeth Unigol Marie Curie gan y Comisiwn Ewropeaidd
- Cyngor Ymchwil yr Amgylchedd Naturiol
- Cyfoeth Naturiol Cymru
- Ymddiriedolaeth Afonydd De Ddwyrain Cymru
Aelodau diweddar o'r grŵp ymchwil
Rhidian Thomas
- Goruchwylwyr: Dr Siân Griffiths a'r Athro Jo Cable
- Teitl doethuriaeth: Gwasgariad rhywogaethau dŵr croyw ymledol ym Mhrydain
- Teitl prosiect PhD: Lledaeniad rhywogaethau dŵr croyw ymledol ym Mhrydain
- Cyllid: Coleg Cymraeg Cenedlaethol
Ifan Jâms
- Goruchwylwyr: Drs Siân Griffiths, Isabelle Durance & Hefin Jones
- Teitl doethuriaeth: Effaith argaeledd dŵr lleihaol ar eog a brithyll afonydd Cymru
- Teitl prosiect PhD: Dylanwad sychder ar frithyll ac eog yn afonydd Cymru
- Cyllid: Coleg Cymraeg Cenedlaethol
Rhian Newman
- Goruchwylwyr: Dr Siân Griffiths, yr Athro Steve Ormerod, Dr Rob Thomas a Dr Bill Riley
- Teitl y prosiect: Golau nos artiffisial fel rhwystr i fudo a symud pysgod a physgodfeydd gwerth uchel
- Cyllid: KESS, Ecoexplore a CEFAS
Stephen Thomas
- Goruchwylwyr: Yr Athro Steve Ormerod & Dr Siân Griffiths
- Teitl prosiect PhD: Addasu afonydd i Newid Hinsawdd i gefnogi pysgod a physgodfeydd o werth uchel. Ariannwyd gan KESS, South East Wales Rivers Trust and Environment Agency
- Cyllid: KESS ac Ymddiriedolaeth Afonydd De Ddwyrain Cymru
Cyn-aelodau'r grŵp
Ôl-ddoethurol
Dr Tristan Guttridge
- Dynameg poblogaeth siarcod yn y Bahamas.
- Ariannwyd gan Christine Baltzer Parks Environmental Foundation
Dr Steven Kessel
- Dynameg poblogaeth y siarcod lemon yn y Bahamas (Negaprion brevirostris).
- Ariannwyd gan Christine Baltzer Parks Environmental Foundation
Dr Michele Drès
- Dadansoddiad moleciwlaidd o glystyru gofodol kin-rhagfarnllyd o eog ifanc yr Iwerydd Ariannwyd gan Fenter Ymchwilydd Ifanc Caerdydd
Dr Johan Höjesjö
- Addasiadau cynefin mewn salmonidau, effeithiau cystadleuaeth ryng-benodol Ariennir gan Gymrodoriaeth Unigol Marie Curie
Dr Alfredo Ojanguren
- Canlyniadau ymddygiadol ac ecolegol penderfyniadau eryr mewn pysgod Wedi'i ariannu gan yr NERC (Cyngor Ymchwil yr Amgylchedd Naturiol)
Dr James Orpwood
- Canlyniadau ymddygiadol ac ecolegol penderfyniadau eryr mewn pysgod Wedi'i ariannu gan yr NERC (Cyngor Ymchwil yr Amgylchedd Naturiol)
Myfyrwyr ôl-raddedig
Dr Bart Adriaenssens
- Ymdopi â sylw rhanedig: effeithiau'r amgylchedd cymdeithasol a chorfforol ar berfformiad pysgod. Mewn cydweithrediad â Phrifysgol Gothenburg, Sweden.
Dr Demetra Andreou
- Mynychder, effaith a chylch bywyd clefyd endemig sy'n dod i'r amlwg: yr asiant tebyg i Rosette. Ariannwyd gan CEH.
Dr Claire Bale
- Dylanwad episodau asid ar ecoleg ymddygiadol pysgod dŵr croyw. Ariannwyd gan y NERC
Dr Dean Burnard
- Effaith pheromones rhyw rhywogaethau pysgod estron ar ymddygiad atgenhedlu pysgod brodorol. Ariannwyd gan y NERC
Laura Evans
- Bullheads fel rhywogaethau carreg allweddol ar gyfer gwasanaethau ecosystem afon. Ariannwyd gan KESS ac Afonydd Cymru.
Dr Wendy Fernandes
- Rhyngweithio rhwng nodweddion teuluol, goroesiad yr amgylchedd a strategaethau mudo mewn eog yr Iwerydd. Ariannwyd gan Wessex Water, CEH, CEFAS
Dr Andrew Harwood
- Cystadleuaeth ymhlith eogiaid ifanc yr Iwerydd a Brithyll Brown. Ariannwyd gan yr NERC.
Cors Becky
- Effaith tymheredd ar ddefnyddio lloches mewn eog Iweryddol ifanc. Ariannwyd gan Lea
Dr James Orpwood
- Defnydd o loches ymhlith eog yr Iwerydd sy'n byw yn y nant. Ariannwyd gan Brifysgol Caerdydd
Phoebe Harris
- Effaith golau nos artiffisial ar ecoleg afonydd. Ysgoloriaeth Prifysgol Caerdydd 125.
Dr Lois Richards-Hobbs
- Cadwraeth ddeietegol mewn pysgod: ei ganlyniadau esblygiadol mewn anifeiliaid cymdeithasol ac unig. Ariannwyd gan Sefydliad Waltham
Dr Keith Williams
- Ecoleg eogiaid yr Iwerydd mewn perthynas â loch ucheldirol. Ariannwyd gan Fwrdd Pysgodfeydd Dosbarth Conon and Alness a Phrifysgol Caerdydd
Janine Burnham
- Goruchwylwyr: Drs Siân Griffiths, Isabelle Durance & Dylan Roberts
- Teitl prosiect MRes: Profi effaith adfer cynefinoedd glannau afonol wrth liniaru effeithiau newid hinsawdd ar bysgod brodorol y DU
- Cyllid: KESS ac Ymddiriedolaeth Cadwraeth Gêm a Bywyd Gwyllt
- Ymddiriedolaeth Cadwraeth Gêm a Bywyd Gwyllt
- Effeithiau ecolegol rheoli torlannol
Addysgu
Mae'r rolau yn cynnwys:
Uwch Gymrawd yr Academi Addysg Uwch
Cadeirydd, Grŵp Amgylchiadau Lliniarol Israddedig
Arweinydd Cynllun Gradd, Gwyddorau Biolegol 2017-2023
Arweinydd Asesu ar gyfer Ecosystemau, Cynaliadwyedd a Newid Byd-eang (lefel 6)
Arweinydd ar gyfer Cwrs Maes Bioleg Arfordirol, Sir Benfro (lefel 5)
Rwyf hefyd yn cyfrannu at ystod o addysgu ar lefel meistr ac israddedig, gan gynnwys goruchwylio myfyrwyr prosiect ymchwil israddedig blwyddyn olaf a phrosiectau ymchwil Meistr Integredig (lefelau 6 a 7), a thrwy ddarlithoedd ac ymarferion mewn Amrywiaeth ac Addasu Anifeiliaid, ac Ymennydd ac Ymddygiad (lefel 5) yn ogystal â gweithdai mewn Meistroli Ysgrifennu Gwyddonol (lefel 4).
Ar hyn o bryd rwy'n Arholwr Allanol ar gyfer Prifysgol Glasgow, a chyn hynny i Brifysgol Bryste, Prifysgol Abertawe a Choleg Imperial Llundain.
Arholwr PhD: Perfformiodd 22 o bobl yn y DU a 3 Rhyngwladol hyd at ddiwedd 2024
Bywgraffiad
Astudiais ar gyfer fy ngradd gyntaf ym Mhrifysgol Cymru, Aberystwyth rhwng 1990 a 1993, ac ar gyfer fy MSc ym Mhrifysgol Rhydychen ym 1994. Cwblheais fy PhD ar ymddygiad addysgu pysgod dŵr croyw ym Mhrifysgol St. Andrews ym 1997 lle cefais fy ngoruchwylio gan yr Athro Anne Magurran (http://www.st-andrews.ac.uk/~guppy/). Yn ystod y cyfnod hwn roedd fy ngwaith maes wedi'i leoli yn Trinidad a Tobago, ac yn Labordy Afon CEH, Dorset (http://www.ceh.ac.uk/sections/re/re.html )
Ym 1998 dechreuais weithio fel Cymrawd Ymchwil NERC ym Mhrifysgol Glasgow (http://www.gla.ac.uk/ibls/DEEB/) a'r Gwasanaethau Ymchwil Pysgodfeydd, Labordy Dŵr Croyw, Pitlochry (http://www.marlab.ac.uk/FRS.Web/default.aspx). Ymunais â Phrifysgol Caerdydd yn 2000 pan gefais estyniad i fy nghymrodoriaeth NERC ac fe'm penodwyd ar yr un pryd yn Ddarlithydd mewn ecoleg anifeiliaid. Yn 2007 cefais fy mhenodi'n Uwch Ddarlithydd a Darllenydd yn 2026.