Distribution of Dwarf Crocodile (Osteolaemus Tetraspis Cope, 1861) Populations on the Outskirts of the Ebo Forest: Implications for Conservation

Authors

  • Agbor James Ayamba Department of Forestry and Wildlife, University of Buea, Cameroon
  • Tsiaze Kuete Thomas Ajemalebu Self Help, Kumba, South West Region, Cameroon
  • Harrison Nnoko Ajebe Ajemalebu Self Help, Kumba, South West Region, Cameroon
  • Ndjounguep Juscar Ajemalebu Self Help, Kumba, South West Region, Cameroon
  • Prossie Manual Venceslas Ajemalebu Self Help, Kumba, South West Region, Cameroon

DOI:

https://doi.org/10.47672/ajes.1768
Abstract views: 117
PDF downloads: 22

Keywords:

Distribution, Dwarf Crocodile, Ebo Forest, Implications Conservation

Abstract

Purpose: The study was carried out in three riparian areas of the Ebo forest (Iboti, Lognanga and Ndokmem-North zones) to determine the distribution and status of dwarf crocodiles, and environmental factors influencing their distributions.  

Materials and Methods: Survey on the various listed sites were carried out during the months of April, May and June 2023. The Qgis software was used to produce the distribution map of dwarf crocodiles in the periphery of the Ebo forest from the coordinates recorded at 11 water points using a GPS and 37 fishermen/ hunters were interview.

Findings: The species were classified according to their status defined according to the IUCN red list protocol. The study showed that of the 11 water points studied, 6 were home to dwarf crocodiles, representing a proportion of 54.54%. Although we did not observed dwarf crocodiles in the watercourses in the Iboti zone, their presence is more established in the Lognanga zone (60%) than in the Ndokmem-north zone (40%). The average density of dwarf crocodiles in the periphery of the Ebo forest is around 0.50 crocodiles/km of riverbank covered. This implies that the population of dwarf crocodiles is decreasing and there is high need to increase conservation efforts to protect it from disappearing within the Ebo forest area.

Implications to Theory, Practice and Policy: To guarantee the survival and viability of crocodiles in the periphery of the Ebo forest, it is necessary to opt for organic agriculture, monitoring the quality of rivers and water bodies and regular ecological monitoring of crocodiles.

Downloads

Download data is not yet available.

References

Alden, PC, Etes, RD, Schilter, D. & Mcbride,B.(2001) Photoguide of African animals, Paris, 895-898.

Brown CJ, Stander P., Meyer-Rust R. & Mayes S. (2004). Results of a Crocodile Crocodylus niloticus survey in the river systems of north-east Namibia during August 2004. IUCN/SSC Crocodile Specialist Group Newsletter. IUCN, Gland, Switzerland, 23 (3) 18-21 p.

Dember S.(1990). FAO assistance in crocodile management efforts. Unasylva, FAO, Rome, 161 (41) 21-25.

Djeukam R.2012. Cameroonian wildlife legislation as a tool for protecting animal species threatened with extinction in Cameroon. p 19.

FuistingP. 2015. In-situ and ex-situ crocodile conservation under special consideration of release projects. - State examination thesis, University of Cologne, 1-133.

Gardenfors, U., Hilton-Taylor, C., Mace, G. and Rodríguez, JP. (2001). The application of IUCN Red List Criteria at regional levels. Conservation Biology 15, 1206–1212 p.

Gonwou NL and LeBreton M.2004. Inventory of Reptiles of UFA11-02: Conservation and potential effects of forestry activities. Unpublished report to WCS Cameroon, p 24.

Ihlow F, Bonker R, Hartmann T, Geissler P, Behler N, Rodder D. 2015. Habitat suitability, coverage by protected areas and population connectivity for the Siamese crocodile Crocodylus siamensis Schneider, 1801. Aquatic Conservation: Marine and Freshwater Ecosystems. 25:544–554. DOI: 10.1002/aqc.2473, Available online at wileyonlinelibrary.com

IUCN(2003). Guidelines for the Application, at the Regional Level, of the IUCN Red List Criteria. IUCN Species Survival Commission. Version 3.0, IUCN, Gland, Switzerland and Cambridge, United Kingdom. 26 p.

IUCN(2006). Specialist Group Newsletter. IUCN, Gland, Switzerland, 22 p.

KPERA NGAfrican crocodiles, between poaching and protection. http//www.natura-sciences.com/crocodiles-du-nil-afrique453.html. Consulted theApril 1, 2023

Lamarque, F., Anderson, J., Fergusson, R., Lagrange, M., Osei-Owusu, Y. & Bakker, L.,2009, Human-Wildlife conflict in Africa, Causes, consequences and management strategies, FAO Forestry Paper 157, 98 pp.

LeBreton, M. Chirio, L. & Foguekem, D.(2003). Reptiles of Takamanda Forest Reserve, Cameroon. Smithsonian Institution Press 8 pp 83 - 94.

Madden2004. Creating Coexistence between Humans and Wildlife: Global Perspectives on Local Efforts to Address Human-Wildlife Conflict. Human Dimensions of Wildlife. 9:247-257

Mahmoud, MI, Campbell, MJ, Sloan, S., Alamgir, M., Laurance, WF,2019. Land-cover change threatens tropical forests and biodiversity in the Littoral Region, Cameroon. Oryx 1–10.https://doi.org/10.1017/S0030605318000881.

Makongo NDF. 2013. Characterization of the fishing of the dwarf crocodile Osteolaemus tetraspis in the district of Yabassi. Fisheries engineering dissertation. Institute of Fisheries Sciences in Yabassi, University of Douala, 35 p.

MINADER.(2012). Annual activity report. Departmental Delegation/MINADER, Cameroon, Yabassi, 4-6p.

MINEPIA(Minister of Livestock, Fisheries and Animal Industries). 2000. Order No. 0002 /MINEPIA of August 1, 2000 Setting the modalities for the protection of fishery resources in Cameroon.

MINFOF(Ministry of Forests and Wildlife). 2006. Classification of endangered species into classes A, B and C.

Morgan, B.J., Wild, C., Ekobo, A.,2003. Newly discovered gorilla population in the Ebo Forest, Littoral Province, Cameroon. Int. J. Primatol. 24, 1129–1137. https://doi.org/10.1023/A:1026288531361.

Morrison K., Victurine R. & Mishra C.,2009. Lessons learned opportunities and innovations in Human Wildlife conflict compensation and insurance schemes. WCS TransLinks Program.

Navarro-oath CJ(2003). Abundance, habitat use and conservation of the American crocodiles in Sinalao. Crocodile Specialist Group Newsletter 22 (2) 22-23 p.

Osborn FV & Anstey S. 2002. Elephant/human conflict and community development around the Niassa Reserve, Mozambique. Consultancy for WWF/SARPO by the Mid-Zambezi Elephant Project. Harare, Zimbabwe.

Rakotondrazafy, AM Ny A.,2010, Summary report on Crocodylus niloticus studies in Madagascar (Year 2008-2009), To assist Madagascar in the implementation of the action plan for the management of crocodiles, Ministry of the Environment, Forests and Tourism , Department of Animal Biology, Faculty of Sciences, University of Antananarivo, 30 pp.

Ross JP(1998). Status Survey and Conservation Action Plan-Crocodiles. IUCN Species Survival Commission, Gland. 69 p.

Santiapillai C. & de Silva M.(2001). Status, distribution and conservation of crocodiles in Sri Lanka. Biological Conservation 97, 305-318 p.

Tchamba MN,1996. History and present status of the human/elephant conflict in the Waza-Logone region, Cameroon, West Africa. Biological Conservation 75:35–41.

Thorbjarnarson J. & Eaton M.(2004) Preliminary examination of crocodile bushmeat issues in the republic of Congo and Gabon. in Crocodiles: Proceedings of the 17th Working Meeting of the IUCNSSC Crocodile Specialist Group. Gland, Switzerland IUCN.

Tiogue et al.,2016. Socio - technical - economic characterization of artisanal fishing of the African Dwarf crocodile Osteolaemus tetraspis (Cope, 1861) in the district of Yabassi, Littoral Cameroon.

Vanga AF.2011. Evolution of fishing at Lake Ayamé since the expulsion of non-national fishermen (Côte d'Ivoire). Tropicultura, 20(1):8-13 p.

Weladji RB, Tchamba NM. (2003). Conflict between people and protected areas within the Benoue Wildlife Conservation Area, North Cameroon. Oryx, 37: 72-79 p.

Wild, C.(2000). Report on the Status of Crocodilians in the Cameroon Forest Zone. In 'Crocodiles': Proceedings of the 15th working meeting of the Crocodile Specialist Group of the Species Survival Commission of IUCN, Varadero, Cuba, 17-20 January 2000. World Conservation Union, Gland, Switzerland.

WWFRegional Office for Africa–Yaoundé hub, Yaoundé, pp. 34.

Downloads

Published

2024-02-09

How to Cite

Ayamba, A. J. ., Thomas, T. K. ., Ajebe, H. N. ., Juscar, N. ., & Venceslas, P. M. . (2024). Distribution of Dwarf Crocodile (Osteolaemus Tetraspis Cope, 1861) Populations on the Outskirts of the Ebo Forest: Implications for Conservation. American Journal of Environment Studies, 7(1), 1 - 14. https://doi.org/10.47672/ajes.1768

Issue

Section

Articles