Porth Ymchwil

Professor Julia Patricia Gordon Jones

Athro

Aelodaeth

Dolenni cyswllt

ORCID: 0000-0002-5199-3335
51 - 100 o blith 138Maint y tudalen: 50
Trefnu yn ôl: Primeiro autor
  1. Cyhoeddwyd

    Mind the gap: the use of research in protected area management in Madagascar

    Rafidimanantsoa, H. P., Poudyal, M., Ramamonjisoa, B. S. & Jones, J. P. G., Rhag 2018, Yn: Madagascar Conservation and Development. 13, 1, t. 15-24

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  2. Cyhoeddwyd

    What role should randomized control trials play in providing the evidence base for conservation?

    Pynegar, E. L., Gibbons, J. M., Asquith, N. M. & Jones, J. P. G., Maw 2021, Yn: Oryx. 55, 2, t. 235-244

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  3. Cyhoeddwyd

    The effectiveness of Payments for Ecosystem Services at delivering improvements in water quality: lessons for experiments at the landscape scale

    Pynegar, E. L., Jones, J. P. G., Gibbons, J. M. & Asquith, N. M., 23 Hyd 2018, Yn: PeerJ. 6, e5753.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  4. Cyhoeddwyd

    Human well-being impacts of terrestrial protected areas

    Pullin, A. S., Bangpan, M., Dalrymple, S., Dickson, K., Haddaway, N. R., Healey, J. R., Hauari, H., Hockley, N., Jones, J. P. G., Knight, T., Vigurs, C. & Oliver, S., 28 Hyd 2013, Yn: Environmental Evidence. 2, t. article 19

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  5. Cyhoeddwyd

    Household economy, forest dependency & opportunity costs of conservation in eastern rainforests of Madagascar

    Poudyal, M., Rakotonarivo, O. S., Razafimanahaka, J. H., Hockley, N. & Jones, J. P. G., 23 Hyd 2018, Yn: Scientific data. 5, 180225.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  6. Cyhoeddwyd

    Nature’s contribution to poverty alleviation, human wellbeing and the SDGs

    Poudyal, M., Kraft, F., Wells, G., Das, A., Attiwilli, S., Schreckenberg, K., Lele, S., Daw, T., Torres-Vitolas, C., Setty, S., Adams, H., Ahmad, S., Ryan, C., Fisher, J., Robinson, B., Jones, J. P. G., Homewood, K., Bluwstein, J., Keane, A., Macamo, C. & Mugi, L. M., 22 Chwef 2024, Yn: Scientific data. 11, 1, t. 229 229.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  7. Cyhoeddwyd

    Who bears the cost of forest conservation?

    Poudyal, M., Jones, J. P. G., Rakotonarivo, O. S., Hockley, N., Gibbons, J. M., Mandimbiniaina, R., Rasoamanana, A., Andrianantenaina, N. S. & Ramamonjisoa, B. S., 5 Gorff 2018, Yn: PeerJ. 6, e5106.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  8. Cyhoeddwyd

    Can REDD+ social safeguards reach the ‘right’ people? Lessons from Madagascar

    Poudyal, M., Ramamonjisoa, B. S., Hockley, N., Rakotonarivo, O. S., Gibbons, J. M., Mandimbiniaina, R., Rasoamanana, A. & Jones, J. P. G., Maw 2016, Yn: Global Environmental Change. 37, t. 31-42

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  9. Cyhoeddwyd

    TESSA: A toolkit for rapid assessment of ecosystem services at sites of biodiversity conservation importance

    Peh, K. S.-H., Balmford, A., Bradbury, R. B., Brown, C., Butchart, S. H. M., Hughes, F. M. R., Stattersfield, A., Thomas, D. H. L., Walpole, M., Bayliss, J., Gowing, D., Jones, J. P. G., Lewis, S. L., Mulligan, M., Pandeya, B., Stratford, C., Thompson, J. R., Turner, K., Vira, B., Willcock, S. & Birch, J. C., Medi 2013, Yn: Ecosystem Services. 5, t. 51-57

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  10. Cyhoeddwyd

    Biodiversity conservation as a promising frontier for behavioural science

    Nielsen, K. S., Marteau, T. M., Bauer, J. M., Bradbury, R. B., Broad, S., Burgess, G., Burgman, M. A., Byerly, H., Clayton, S., Espelosin, D., Ferraro, P. J., Fisher, B., Garnett, E. E., Jones, J. P. G., Otieno, M., Polasky, S., Ricketts, T. H., Trevelyan, R., van der Linden, S., Verissimo, D. & Balmford, A., Mai 2021, Yn: Nature Human Behaviour. 5, 5, t. 550-556

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Making Robust Policy Decisions Using Global Biodiversity Indicators

    Nicholson, E., Collen, B., Barausse, A., Blanchard, J. L., Costelloe, B. T., Sullivan, K. M. E., Underwood, F. M., Burn, R. W., Fritz, S., Jones, J. P. G., McRae, L., Possingham, H. P. & Milner-Gulland, E. J., 18 Gorff 2012, Yn: PLoS ONE. 7, 7, e41128.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  12. Cyhoeddwyd

    Spatial patterns of carbon, biodiversity, deforestation threat, and REDD+ projects in Indonesia

    Murray, J. P., Grenyer, R., Wunder, S., Raes, N. & Jones, J. P. G., 10 Ebr 2015, Yn: Conservation Biology. 29, 5, t. 1434-1445

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  13. Cyhoeddwyd

    Organic carbon stocks in all pools following land cover change in the rainforest of Madagascar.

    Mieja , R., Andriamananjara, A., Razafimbelo, T., Hewson, J., Andrisoa, R., Jones, J. P. G., van Meerveld, I., Cameron, A., Ranaivoson, N., Ramifehiarivo, N., Ramboatiana, N., Razafinarivo, R., Ramananantoandro, T., Rasolohery, A., Razafimanantsoa, M., Jourdan, C., Saint-André, L., Rajoelison, G. & Razakamanarivo, H., 2018, Soil Management and Climate Change: Effects on Organic Carbon, Nitrogen Dynamics, and Greenhouse Gas Emissions. Muñoz, M. & Zornoza, R. (gol.). Academic Press, Elsevier, t. 25-37 12 t.

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

  14. Cyhoeddwyd

    Sustainability: root targets in consensus

    Maxwell, S. & Jones, J. P. G., 23 Hyd 2014, Yn: Nature. 514, 7523, t. 434-434

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  15. Cyhoeddwyd

    Being smart about SMART environmental targets

    Maxwell, S. L., Milner-Gulland, E. J., Jones, J. P. G., Knight, A. T., Bunnefeld, N., Nuno, A., Bal, P., Earle, S., Watson, J. E. M. & Rhodes, J. R., 6 Maw 2015, Yn: Science. 347, 6226, t. 1075-1076

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  16. Cyhoeddwyd

    Global no net loss of natural ecosystems

    Maron, M., Simmonds, J. S., Watson, J. E. M., Sonter, L. J., Bennun, L., Griffiths, V. F., Quétier, F., von Hase, A., Edwards, S., Rainey, H., Bull, J. W., Savy, C. E., Victurine, R., Kiesecker, J., Puydarrieux, P., Stevens, T., Cozannet, N. & Jones, J. P. G., Ion 2020, Yn: Nature Ecology and Evolution. 4, 1, t. 46-49 33.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  17. Cyhoeddwyd

    Nature positive must incorporate, not undermine, the mitigation hierarchy

    Maron, M., Quétier, F., Sarmiento, M., ten Kate, K., Evans, M. C., Bull, J. W., Jones, J. P. G., zu Ermgassen, S. O. S. E., Milner-Gulland, E. J., Brownlie, S., Treweek, J. & von Hase, A., 21 Medi 2023, Yn: Nature Ecology and Evolution.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  18. Cyhoeddwyd

    Evidence of anticipatory forest use behaviours under policy introduction: a systematic map protocol

    Llopis, J. C., Haddaway, N. R., Omirbek, N., Simmons, B. A., Garrett, R. & Jones, J. P. G., 2023, Yn: Environmental Evidence. 12, 1, t. 20 1 t., 20.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  19. Cyhoeddwyd

    To what extent do potential conservation donors value community-aspects of conservation projects in low income countries?

    Lewis, A., Young, R. P., Gibbons, J. & Jones, J. P. G., 16 Chwef 2018, Yn: PLoS ONE. 13, 2, e0192935.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  20. Cyhoeddwyd

    Modelling the effect of individual strategic behaviour on community-level outcomes of conservation interventions

    Keane, A., Jones, J. P. G. & Milner-Gulland, E. J., Rhag 2012, Yn: Environmental Conservation. 39, 4, t. 305-315

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  21. Cyhoeddwyd

    Evidence for the effects of environmental engagement and education on knowledge of wildlife laws in Madagascar.

    Keane, A., Ramarolahy, A. A., Jones, J. P. G. & Milner-Gulland, E. J., 1 Chwef 2011, Yn: Conservation Letters. 4, 1, t. 55-63

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Encounter data in resource management and ecology: pitfalls and possibilities

    Keane, A., Jones, J. P. G. & Milner-Gulland, E. J., Hyd 2011, Yn: Journal of Applied Ecology. 48, 5, t. 1164-1173

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  23. Cyhoeddwyd

    The sleeping policeman: understanding issues of enforcement and compliance in conservation.

    Keane, A., Jones, J. P. G., Edwards-Jones, G. & Milner-Gulland, E. J., 1 Ebr 2008, Yn: Animal Conservation. 11, 2, t. 75-82

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  24. Cyhoeddwyd

    Stocks and flows of natural and human-derived capital in ecosystem services

    Jones, L., Norton, L., Austin, Z., Browne, A. L., Donovan, D., Emmett, B. A., Grabowski, Z. J., Howard, D. C., Jones, J. P. G., Kenter, J. O., Manley, W., Morris, C., Robinson, D. A., Short, C., Siriwardena, G. M., Stevens, C. J., Storkey, J., Waters, R. D. & Willis, G. F., 29 Rhag 2015, Yn: Land Use Policy. 52, t. 151–162

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  25. Cyhoeddwyd

    Getting what you pay for: the challenge of measuring success in conservation

    Jones, J. P. G., Meh 2012, Yn: Animal Conservation. 15, 3, t. 227-228

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  26. Cyhoeddwyd

    The why, what, and how of global biodiversity indicators beyond the 2010 target.

    Jones, J. P. G., Collen, B., Atkinson, G., Baxter, P. W., Bubb, P., Illian, J. B., Katzner, T. E., Keane, A., Loh, J., McDonald-Madden, E., Nicholson, E., Pereira, H. M., Possingham, H. P., Pullin, A. S., Rodrigues, A. S., Ruiz-Gutierrez, V., Sommerville, M. & Milner-Gulland, E. J., 17 Tach 2010, Yn: Conservation Biology.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  27. Cyhoeddwyd

    Net Gain: Seeking better outcomes for local people when mitigating biodiversity loss from development

    Jones, J. P. G., Bull, J. W., Roe, D., Baker, J., Griffiths, V. F., Starkey, M., Sonter, L. J. & Milner-Gulland, E., 25 Hyd 2019, Yn: One Earth. 1, 2, t. 195-201

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  28. Cyhoeddwyd

    Population regulation and demography in a harvested freshwater crayfish from Madagascar.

    Jones, J. P. G. & Coulson, T., 1 Maw 2006, Yn: Oikos. 112, 3, t. 602-611

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  29. Cyhoeddwyd

    Monitoring species abundance and distribution at the landscape scale.

    Jones, J. P. G., 7 Ion 2011, Yn: Journal of Applied Ecology. 48, 1, t. 9-13

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  30. Cyhoeddwyd

    The economic importance of freshwater crayfish harvesting in Madagascar and the potential of community-based conservation to improve management.

    Jones, J. P. G., Andriahajaina, F. B., Ranambinintsoa, E. H., Hockley, N. J. & Ravoahangimalala, O., 1 Ebr 2006, Yn: Oryx. 40, 2, t. 168-175

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  31. Cyhoeddwyd

    A multidisciplinary approach to assessing the sustainability of freshwater crayfish harvesting in Madagascar.

    Jones, J. P. G., Andriahajaina, F. B., Hockley, N. J., Balmford, A. & Ravoahangimalala, O., 1 Rhag 2005, Yn: Conservation Biology. 19, 6, t. 1863-1871

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  32. Cyhoeddwyd

    The ecology and conservation status of Madagascar's endemic freshwater crayfish (Parastacidae; Astacoides).

    Jones, J. P. G., Andriahajaina, F. B., Hockley, N. J., Crandall, K. A. & Ravoahangimalala, O. R., 1 Medi 2007, Yn: Freshwater Biology. 52, 9, t. 1820-1833

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  33. Cyhoeddwyd

    The perfect invader: a parthenogenic crayfish poses a new threat to Madagascar's freshwater biodiversity.

    Jones, J. P. G., Rasamy, J. R., Harvey, A., Toon, A., Oidtmann, B., Randrianarison, M. H., Raminosoa, N. & Ravoahangimalala, O. R., 1 Meh 2009, Yn: Biological Invasions. 11, 6, t. 1475-1482

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  34. Cyhoeddwyd

    An unprecedented opportunity for biodiversity conservation? Hopes and fears surrounding international payments for ecosystem services.

    Jones, J. P. G. & Gardner, T., 1 Ion 2008, Yn: Oryx. 42, 1, t. 17

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  35. Cyhoeddwyd

    Nature documentaries and saving nature: reflections on the new Netflix series Our Planet

    Jones, J. P. G., Thomas-Walters, L., Rust, N. A. & Verissimo, D., Rhag 2019, Yn: People and Nature. 1, 4, t. 420-425

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  36. Cyhoeddwyd

    Testing the use of interviews as a tool for monitoring trends in the harvesting of wild species

    Jones, J. P. G., Andriamarovololona, M. M., Hockley, N., Gibbons, J. M. & Milner-Gulland, E. J., 28 Meh 2008, Yn: Journal of Applied Ecology. 45, 4, t. 1205-1212

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  37. Cyhoeddwyd

    Last chance for Madagascar’s biodiversity

    Jones, J. P. G., Ratsimbazafy, J., Ratsifandrihamanana, A. N., Watson, J. E. M., Andrianandrasana, H. T., Cabeza, M., Cinner, J. E., Goodman, S. M., Hawkins, F., Mittermeier, R. A., Rabearisoa, A. L., Rakotonarivo, O. S., Razafimanahaka, J. H., Razafimpahanana, A. R., Wilmé, L. & Wright, P. C., 29 Ebr 2019, Yn: Nature Sustainability . 2, 5, t. 350-352

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  38. Cyhoeddwyd

    Madagascar: Crime threatens biodiversity

    Jones, J. P. G., Ratsimbazafy, J., Ratsifandrihamanana, A. N., Watson, J. E. M., Andrianandrasana, H. T., Cabeza, M., Cinner, J. E., Goodman, S. M., Hawkins, F., Mittermeier, R. A., Rabearisoa, A. L., Rakotonarivo, O. S., Razafimanahaka, J. H., Razafimpahanana, A. R., Wilmé, L. & Wright, P. C., 22 Chwef 2019, Yn: Science. 363, 6429, t. 825-825

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Llythyr › adolygiad gan gymheiriaid

  39. Cyhoeddwyd

    The importance of taboos and social norms to conservation in Madagascar.

    Jones, J. P. G., Andriamarovololona, M. M. & Hockley, N., 1 Awst 2008, Yn: Conservation Biology. 22, 4, t. 976-986

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  40. Cyhoeddwyd

    Forest carbon offsets are failing

    Jones, J. P. G. & Lewis, S. L., 25 Awst 2023, Yn: Science. 381, 6660, t. 830-831 2 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  41. E-gyhoeddi cyn argraffu

    Scandal in the voluntary carbon market must not impede tropical forest conservation

    Jones, J. P. G., 3 Meh 2024, (E-gyhoeddi cyn argraffu) Yn: Nature Ecology and Evolution.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  42. E-gyhoeddi cyn argraffu

    The causal revolution in biodiversity conservation

    Jones, J. P. G. & Shreedhar, G., 24 Mai 2024, (E-gyhoeddi cyn argraffu) Yn: Nature Human Behaviour.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  43. Cyhoeddwyd

    The potential of native species aquaculture to achieve conservation objectives: freshwater crayfish in Madagascar

    Jones, J. P. G., Hockley, N. J. & Andriahajaina, F. B., 1 Rhag 2007, Yn: International Journal of Biodiversity Science and Management. 3, 4, t. 217-222

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  44. Cyhoeddwyd

    Human migration to the forest frontier: implications for land use change and conservation management

    Jones, J. P. G., Mandimbiniaina, R., Kelly, R., Ranjatson, P., Rakotojoelina, B., Schreckenberg, K. & Poudyal, M., Meh 2018, Yn: Geo: Geography and Environment. 5, 1, e00050.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  45. Cyhoeddwyd

    The scale of the biodiversity crisis laid bare

    Jones, J. P. G., 4 Tach 2024, Yn: Nature. 635, t. 31-33

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Adolygiad Llyfr/Ffilm/Erthygl › adolygiad gan gymheiriaid

  46. Cyhoeddwyd

    Forest Conservation in Madagascar: Past, Present, and Future

    Jones, J. P. G., Rakotonarivo, O. S. & Razafimanahaka, J. H., 15 Tach 2022, The New Natural History of Madagascar. Goodman, S. M. (gol.). Princeton University Press

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod

  47. Cyhoeddwyd

    Analysis of Patterns of Bushmeat Consumption Reveals Extensive Exploitation of Protected Species in Eastern Madagascar

    Jenkins, R., Keane, A., Rakotoarivelo, A. R., Rakotomboavonjy, V., Randrianandrianina, F. H., Razafimanahaka, H. J., Ralaiarimalala, S. R. & Jones, J. P. G., 14 Rhag 2011, Yn: PLoS ONE. 6, 12, t. e27570

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  48. E-gyhoeddi cyn argraffu

    Improving compliance around protected areas through fair administration of rules

    Ibbett, H., Dorward, L., Jones, J. P. G., Kohi, E. M., Dwiyahreni, A. A., Sankeni, S., Prayitno, K., Mchomvu, J., Kaduma, J. F., Saputra, A. W., Agustin, I. Y., Trywidiarini, T., Mawenya, R., Supriatna, J. & St. John, F. A. V., 17 Gorff 2024, (E-gyhoeddi cyn argraffu) Yn: Conservation Biology.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  49. Cyhoeddwyd

    Topic sensitivity still affects honest responding, even when specialized questioning techniques are used

    Ibbett, H., Dorward, L., Jones, J. P. G., Kohi, E. M., Sankeni, S., Kaduma, J., Mchomvu, J., Mawenya, R. & St. John, F. A. V., Meh 2023, Yn: Conservation Science and Practice. 5, 6, e12927.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

  50. Cyhoeddwyd

    Asking sensitive questions in conservation using Randomised Response Techniques

    Ibbett, H., Jones, J. P. G. & St John, F. A. V., 1 Awst 2021, Yn: Biological Conservation. 260, 109191.

    Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

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