Renison Ruwa


• Kenya Country Coordinator of the EU-INCO Macrobenthos of East African Mangrove Ecosystems (1996 – 2000)

• Chairman, Board of Governors Kilifi Township Secondary School. 1997 - 2005

• Member of National Environment Council (2001 – 2003 and 2005-2008)

• Team Leader, Global International Water Assessment (GIWA) Somali Coastal Current Sub-region Task Team (2001 – 2005)

• Kenya National Coordinator and Focal Point of the GEF South West Indian Ocean Fisheries Project (SWIOFP) (2002 – Todate)

• Member of Moi University Council (2003– 2009)

• Member of the National Land Policy Review (2004 – 2005)

• Member of Fisheries Policy Taskforce (2004 – 2005)

• Chairman of the Ecosystem Approach in Fisheries (EAF) Regional Task Group of the Agulhas and Somali Currents Large Marine Ecosystems (ASCLME) (2009- 2013)

• Member of the Task Force for the Study on Sustainable Utilization of Kenyan Marine Fisheries Resources (2009- 2011)

• Member of UN Group of Experts DOALOS UN Headquarters New York, US (established pursuant to the UN General Assembly resolution 64/71, paragraph 180) on the “Regular Process for Global reporting and assessment of the State of the Marine Environment, including socioeconomic aspects” (May 2010- To date)

• Member of ASCLME Regional Group of National Advisors on Policy and Governance Task on Marine resources in the Western Indian Ocean Region (August 2010- 2013)
• Ecologist
• PhD University of Florence (Italy)

• MSc. University of Nairobi

• BSc. (Hons Upper Second Class) University of Nairobi
• Reef Ecology: Ecology of sandy shores, Rocky shores, Mangrove swamps and shallow water reefs

• Aquaculture and Fisheries

• Integrated Coastal Zone Management and Ecosystem Approach to Fisheries
• Ruwa, R.K. and W.H. Brakel (1981). Tidal periodicity and size related variation in the zonation of the gastropod Nerita plicata on an East African rocky shore.Kenya Journal of Science and Technology (Series B) 2: 61 - 67.

• Ruwa, R.K.(1982). Marine botanical resources of Kenya coast. pp. 223-232 In: Proceedings of the workshop of the Kenya Marine and Fisheries Research Institute on Aquatic Resources of Kenya, Mombasa, Kenya, July 13-19, 1981. Published by KMFRI and KNAAS, Nairobi. Published by KMFRI and KNAAS, Nairobi.490p

• Ruwa, R.K.(1983). Field demonstration of a tidal component in the rhythmic vertical migrations of Grapsus maculatus (Brachyura: Grapsidae) on a rocky shore in Kenya. Kenya Journal of Science and Technology (series B) 4: 49 - 52.

• Ruwa, R.K. (1984). Invertebrate faunal zonation on rocky shores around Mombasa, Kenya. Kenya Journal of science and Technology (series B) 5: 49 -65.

• Ruwa, R.K.(1984). The commercial Cypraea (mollusca: Gastropoda) of Kenya: Their zoogeography and the implications to conservation. POST (Kenya) IX (1 - 3): 33 - 40.

• Ruwa, R.K. (1985). Human habitations along the Kenyan shoreline and their impacts on the marine environment. POST (Kenya) Vol X (2 - 3): 23 - 25.

• Ruwa, R.K. and P. Polk (1986). Additional information on mangrove distribution in Kenya: Some observation and remarks Kenya Journal of Sciences (series B) 7: 41 - 45.

• Ruwa, R.K and Jaccarini, V. (1986). The dynamic zonation of the Nerita plicata Linnaeus, N. undata and N. textiles Dillwyn (Prosobranchia, Neritacea) populations on a rocky shore in Kenya. Marine Biology 92, 425 - 430.

• Okemwa, E. Ruwa, R.K. and Polk P. (1986). The autecology of the edible oyster Crassostrea cucullata Born 1778: Size related vertical. Kenya Journal of Science (series B) 7: 9 - 14

• Oyieke, H.A. and Ruwa, R.K. (1987). Non-encrusting macro- algal zonation on rocky cliffs around Mombasa, Kenya. Kenya Journal of Sciences (series B) 8 (1 - 2): 77 - 96.

• Ruwa, R.K. (1988). Towards improving shellfish production through appropriate techniques in the culture of the edible oyster Crassostrea cuculata Born. pp 66 –74. In J.R. Mainoya (Ed). Proceedings of the UNESCO/UTAFITI Workshop on the ecology and bioproductivity of Marine Coastal Waters of Eastern Africa. University of Dar-es-Salaam, Tanzania. 18 - 20 January, 1988.. Published by University of Dar es Salaam. 186p

• Ruwa, R.K. and Jaccarini V. (1988). Nocturnal feeding migrations of Nerita plicata, N. undata and N. textiles (prosobranchia: Neritacea) on the rocky shores at Mkomani, Mombasa, Kenya. Marine Biology 99: 229 - 234.

• Ruwa, R.K.(1989). Macrofaunal composition and zonation on sandy beaches at Gazi, Kanamai and Malindi Bay, Kenya. Kenya Journal of Sciences (series B) 10 (1 - 2): 31 - 45.

• Ruwa, R.K. (1990). The effects of habitat complexities created by mangroves on macrofaunal composition in brackishwater intertidal zones at the Kenyan coast. Discovery and Innovation 2(1):49-55.

• Ruwa, R.K.(1990). Growth of Crassostrea cucullata Born (Bivalvia) at different levels in the intertidal zone. Aquaculture 88: 303-312.

• Ruwa, R.K.(1992). Mangrove Wetlands in Kenya.pp 65 –78. In: S.A. Crafter, S.G. Njuguna and G.W. Howard (Eds) 'Wetlands of Kenya: Proceedings of the KWWG Seminar on Wetlands of Kenya, National Museums of Kenya, Nairobi, Kenya. 3 - 5 July, 1991.IUCN 1992. Samara Publishing Ltd, Tresaith, Dyfed, UK. 183pp.

• Ruwa, R.K.(1993). Zonation and distribution of creek and fringe mangrove in the semi-arid Kenya Coast. In: H. Leith and A.Al Massoum (Eds) towards Rational Use of High Salinity Tolerance Plants and Ecosystems. Kluwer Academic Publishers Dordrecht TVS - 1: 97-105.

• Ruwa, R.K. (1993). Mangroves of Kenya. In: E.S. Diop, C.d. Field and M. Vannucci (Eds). Proceedings of Workshop on Conservation and Sustainable Utilization of mangrove forests in Latin America and Africa Regions, Dakar Senegal, 20 - 22 January 1993. ITTO/ISME Project PD 114/90 (F) ITTO SRS No. 13(2) 23 - 24pp.

• Ruwa, R.K., (1993). Les mangroves du Kenya. In: E.S. Diop (Ed). Rapport Sur conservation et utilization rationaelle des forest de mangrove de L'Afrique. ITTO/ISME Project PD 114/90 Mangrove Ecosystem Technical Reports Vol. 3: 230 - 247.

• Vannini M., Innocenti and R.K. Ruwa(1993). Family group structure in mysids, commensals of hermit crabs (Crustacea), Tropical zoology 6: 189-205.

• Ruwa, R.K and Polk, P. (1994). Patterns of spat settlement of the tropical oyster Crassostrea cucullata (Born 1978) and the barnacle, Balanus amphitrite Darwin (1854) in mangrove creek. Tropical zoology 7 (1) 121 - 130.

• Vannini, M. and Ruwa, R.K.(1994). Vertical migrations of the tree crab, Sesarma leptosoma (Decapoda, Grapsidae) Marine Biology 118: 271-278.

• Ruwa, R.K.(1994). Halophytic Coastal marsh vegetation in East Africa. In: V.R. Squires & A.T. Ayoub (Eds). Halophytes as a resource for livestock and for rehabilitation of degraded lands. P.201-210. Dordrecht: Kluwer Academic Publishers.

• Vannini, M., Ruwa, R.K and Innocenti, G. (1994). Notes on the behaviour of Heteromysis harpax a commensal mysid living in hermit crab shells. Ethology, Ecology and Evolution (special issue) 3: 137 - 142.

• Ruwa, R.K. and E.N. Okemwa (1995). Integrated coastal area management: A case study of the Bamburi area in Kenya, East Africa. ACP - EU Fisheries Report (Brussels) 1: 83 - 88.

• Vannini, M. S. Cannicci and R.K. Ruwa(1995). Effects of light intensity on vertical migrations of the tree crabs, Sesarma leptosoma Hilgendorf (Decapoda, Grapsidae). Journal of Experimental Marine Biology and Ecology 185: 181 - 189.

• Cannicci, S., Ritossa, S., Ruwa R.K and Vannini, M. (1996). Tree fidelity and hole-fidelity in the tree crab Sesarma leptosoma (Decapoda, Grapsidae) J. Exp. Mar. Biol. Ecol. 196: 299 - 311.

• Cannicci, S., Ruwa, R.K., Ritossa, S. and Vannini, M. (1996). Branch - fidelity in the tree crab Sesarma leptosoma (Decapods, Grapsidae). J. Zool. Lond. 238, 795 - 801.

• Okemwa, E and Ruwa, R.K.(1996). Integrated coastal zone mangement initiatives and progress in Kenya. Tropical Coasts 2(1): 3 - 5.

• Ruwa, R.K. (1996). Intertidal wetlands. In: East African Ecosystems and their conservation, edited by T.R. McCalanahan and T.P. Young, Oxford University press. 101 - 180pp.

• Okemwa, E.N., Ruwa, R.K. and Mwandotto B.A.J. (1997). Integrated coastal zone management in Kenya: Initial experiences and progress. Ocean and coastal management 37(3): 319 - 347.

• Ruwa, R.K.(1997). Aquatic resource management in the Western Indian Ocean African region. 23 - 25pp In: J.H. Annala (ed.) Fisheries and Aquaculture research planning needs for Africa and West Asia. ICLARM Conf. Proc. 50, 80p.

• Ruwa, R.K.(1997). Zonation of crabs that burrow or bury in the mangrove vegetation soils on the east coast of Kenya. 316 - 332pg. In: B. Kjerfve, L.D deLacerda and E.S. Diop (eds.) Mangrove Ecosystem studies in Latin America and Africa. UNESCO, Paris, 349p.

• Vannini, M., A. Oluoch and Ruwa, R.K(1997). Tree climbing mangrove decapods of Kenyan mangroves 325p. In: B. Kjerfve, L.D. deLacerda and E.S. Diop (eds.) Mangrove Ecosystem studies in Latin America and Africa. UNESCO, Paris 349p.

• Vannini, M., Ruwa, R.K. and S.Cannicci (1997). Effect of microclimatic factors and tide on vertical migrations of the tree crab Sesarma leptosoma Hilgendorf (Decapoda, Grapsidae) . Marine Biology 130(1):101-108.

• Cannicci, S., Ruwa,R.K.,Giuggioli,M.and Vannini,M. (1998). Predatory activity and spatial strategies of Epixanthus dentatus (Decapoda: Ozidae), an ambush predator among mangroves. Journal of Crustacean Biology 18(1):57-63

• Ruwa, R.K.(1998). Coastal marine resources management as an issue of integrated coastal zone management in the Western Indian Ocean Africa region. Bulletin du CERESCOR (Conakry, Guinea) 12 (1998): 68 - 77.

• Hartnoll R.G., S. Cannicci, W.D. Emmerson, S. Fratini, A. Macia, Y. Mgaya, F. Porri, R.K. Ruwa, J.P. Shunula, M.W. Skov and M. Vannini (2002) Geographic trends in mangrove crab abundance in East Africa. Wetlands Ecology and Management 10:203-213.

• Skov, M.W., R.G. Hartnoll, R.K. Ruwa, J.D. Shunula, M. Vannini and S. Cannicci (2005) Marching to a different drummer; Crabs synchronize reproduction to a 14- month lunar-tidal cycles. Ecology 86 (5) 1164-1171.

• Rudy, P. van der Elst, Johan C. Groeneveld, Ana Paula Baloi, Francis Marsac, Kaitira Katonda, Renison K. Ruwa and William R. Lane (2009) Nine nations, one ocean: A benchmark appraisal of the South Western Indian Ocean Project (2008-2012). Ocean and Coastal Management 52:258-267.

• Sigana, D.O.; K.M.Mavuti and R.K. Ruwa(2009) Fish species composition and distribution in Kilifi Creek. In: J. Hoorweg and N. Muthiga (Eds) Advances in Coastal Ecology: People, Processes and Ecosystems in Kenya. African Studies Centre, Africa Studies Collection Vol. 20, pg 15-27. Leiden: Netherlands.

• Kihia,C.M.; J.M. Mathooko, R.K.Ruwa and A.W. Shivoga (2010) Mangrove litter biomass input in a forest impacted by human physical disturbance, Gazi Bay, Kenya. ECOTROPICA 16: 113-123, 2010.

• Kihia, C.M., J.M. Mathooko, R.K. Ruwa& W.A. Shivoga, 2011. Influence of human disturbance on patterns of leaf herbivory at Gazi mangrove forest. African Journal of Aquatic Science 30(3); 1-7.

• Gatune, C., Vanreusel, A., Cnudde, C., Ruwa, R., Bossier, P., De troch, M., 2012. Decomposing mangrove litter supports a microbial biofilm with potential nutritive 4131 value to penaeid shrimp post larvae. J. Exp. Mar. Biol. Ecol. 426-427, 28-38.

• Kihia, C.M., J.M. Mathooko, R.K. Ruwa& W.A. Shivoga, 2012. Leaf herbivore preference in a tropical mangrove forest impacted by human physical disturbance. International Journal of Ecology & Development Vol 12 (2); 52-63.

• Munga, C.N., Mwangi, S., Ong’anda, H., Ruwa, R., Manyala, J., Groeneveld, J.C., Kimani, E., and Vanreusel, A. (2013). Species composition, distribution patterns and population structure of penaeid shrimps in Malindi-Ungwana Bay, Kenya, based on experimental bottom trawl surveys. Fisheries Research 147: 93 – 102.

• Collins K. Ndoro, Boaz Kaunda-Arara, Cosmas N. Munga and RenisonRuwa 2014 Influence of seasonality and bathymetry on decapod crustacean community structure in Malindi-Ungwana Bay, Kenya. Western Indian Ocean Journal of Marine Sciences Vol. 13 No. 1, pp.31-46.

• K. Swaleh, B. Kaunda-Arara, R. Ruwa and R. Raburu 2015 Ecosystem-based assessment of a prawn fisheries in coastal Kenya using indicators. Ecological Indicators 50(2015):233-241.
• Nominated for the title of MAN OF THE YEAR - 2000 by the American
Biographical Institute Inc. International Board of Research for overall accomplishments and contributions to society.

• Awarded a Certificate of Commendation by the UNEP-GIWA Scientific Director for excellent contribution to the Global International Waters Assessment Somali Coastal Current Region and being part of the UNEP-GIWA Network. 2005.

• Awarded a National State Commendation: “Moran of the Burning Spear” (MBS) by the President of Kenya for exemplary contribution to Society, December 2012.

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Renison Ruwa


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