Distribution, habitat utilisation and conservation status of the freshwater crab, Somanniathelphusa zanklon Ng & Dudgeon, 1992 (Crustacea: Brachyura: Gecarcinucidae) endemic to Hong Kong

Main Article Content

David J. Stanton
http://orcid.org/0000-0002-1461-325X
Michael R. Leven
http://orcid.org/0000-0002-8125-818X

Abstract

Somanniathelphusa zanklon Ng & Dudgeon, 1992 is a tropical freshwater crab currently considered endemic to Hong Kong.  The present study shows that S. zanklon has been found in a variety of lotic and lentic habitats, mostly lowland, slow moving streams and marshes.  The species is more widely distributed than previously known, and potentially occurs outside Hong Kong.  However, its habitat is under threat from development and channelization of watercourses.  The life cycle of the crab requires both slow moving streams and marshes for adults and adjacent terrestrial habitats for brooding females, highlighting the need for integrated conservation of lowland streams and their riparian corridors.  It is hoped that understanding of the species habitat requirements will encourage others to further explore lowland watercourses in the Pearl River Delta and aid in habitat conservation.

 

Article Details

How to Cite
[1]
Stanton, D.J. and Leven, M.R. 2016. Distribution, habitat utilisation and conservation status of the freshwater crab, Somanniathelphusa zanklon Ng & Dudgeon, 1992 (Crustacea: Brachyura: Gecarcinucidae) endemic to Hong Kong. Journal of Threatened Taxa. 8, 3 (Mar. 2016), 8564–8574. DOI:https://doi.org/10.11609/jott.2070.8.3.8564-8574.
Section
Communications
Author Biographies

David J. Stanton, AEC Ltd., 127 Commercial Centre, Palm Springs, Yuen Long, Hong Kong

David J. Stanton is a professional ecologist and director at AEC Ltd. based in Hong Kong.  Authors conduct surveys for a wide range of faunal groups and input into a range of large scale Environmental Impact Assessments and Strategic Planning Studies in Hong Kong and Asia.

 

Michael R. Leven, AEC Ltd., 127 Commercial Centre, Palm Springs, Yuen Long, Hong Kong

Michael. R. Leven is a professional ecologist and director at AEC Ltd. based in Hong Kong.  Authors conduct surveys for a wide range of faunal groups and input into a range of large scale Environmental Impact Assessments and Strategic Planning Studies in Hong Kong and Asia.

 

References

Carey, G.J., M.L. Chalmers, D.A. Diskin, P.R. Kennerley, M.R. Leven, R.W. Lewthwaite, D.S. Melville, M. Turnbull & L. Young (2001). The Avifauna of Hong Kong. Hong Kong Bird Watching Society, Hong Kong, 563pp.

Cheung, L.K., H. Lui & C. So (2010). Rivers Reviving Sham Pui River. Green Power, Hong Kong.

Cumberlidge, N., P.K.L. Ng, D.C.J. Yeo, C. Magalhães, M.R. Campos, F. Alvarez, T. Naruse, S.R. Daniels, L.J. Esser, F.Y.K. Attipoe, F.L. Clotilde-Ba, W. Darwall, A. Mcivor, B. Collen & M. Ram (2009). Freshwater crabs and the biodiversity crisis: importance, threats, status, and conservation challenges. Biological Conservation 142(8): 1665–1673; http://dx.doi.org/10.1016/j.biocon.2009.02.038

Drainage Services Department (2014). Agreement No LD 01/2012 Eco-hydraulics Study on Green Channels - Stage 1. Working Paper No.3. Updating of Classification and Prioritization of Hydraulic Resistance and Ecological Value for Existing Green Channels (Final). Document No. 305299/03/05/E.

Dudgeon, D. & E.W.C. Chan (1996). Ecological Study of Freshwater Wetland Habitats in Hong Kong. Report to Agriculture & Fisheries Department, Hong Kong Government.

Dudgeon, D. & C.P.S. Cheung (1990). Selection of gastropod prey by a tropical freshwater crab. Journal of Zoology, London 220: 147–155.

Dudgeon, D. & R. Corlett (1994). Hills and Streams, an Ecology of Hong Kong. Hong Kong University Press, Hong Kong, 234pp.

Dudgeon, D. & R. Corlett (2004). The Ecology and Biodiversity of Hong Kong. Friends of the Country Parks, Hong Kong, 336pp.

Environmental Protection Department (2014). River Water Quality in Hong Kong in 2014. Environmental Protection Department, The Government of the Hong Kong Special Administrative Region.

Environmental Resources Management (2009). 2008 Update of Terrestrial Habitat Mapping and Ranking based on Conservation Value. Report to Sustainable Development Division.

Esser, L. & N. Cumberlidge (2008). Somanniathelphusa zanklon. The IUCN Red List of Threatened Species 2008: e.T134062A3888493. Downloaded on 12 March 2016 http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T134062A3888493.en

Fellowes, J.R, M.W.N. Lau, D. Dudgeon, G.T. Reels, G.W.I. Ades, G.J. Carey, B.P.L. Chan, R.C. Kendrick, K.S. Lee, M.R. Leven, K.D.P.

Wilson & Y.T. Yu (2002). Wild animals to watch: Terrestrial and freshwater fauna of conservation concern in Hong Kong. Memoirs Hong Kong Natural History Society 25: 123­–160.

Hill, R.D. (2011). Environmental Change in Hong Kong - the last 60 Years. Memoirs of the Hong Kong Natural History Society 27: 5–63.

Hong Kong Birdwatching Society (2013). Hong Kong Headline Indicators for Biodiversity and Conservation – 2012 Report. Hong Kong Birdwatching Society, Hong Kong.

Hyder-Mott Connell (2007). Agreement No. CE 25/2001 Hong Kong 2030: Planning Vision and Strategy Strategic Environmental Assessment. Hyder Consulting Limited and Mott Connell Limited, Hong Kong.

Meinhardt (2012). Drainage Improvement Works at Ngong Ping. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

Mott MacDonald (2010). Agreement No. CE 45/2008 (CE) Liantang / Heung Yuen Wai Boundary Control Point and Associated Works. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

Ng, P.K.L. & D. Dudgeon (1992). The Potamidae and Parathelphusidae (Crustacea : Decapoda : Brachyura) of Hong Kong. Invertebrate Taxonomy 6: 741–768.

Ove Arup and Partners Ltd. (2002). Agreement No. CE 29/2001 Outlying Islands Sewerage Stage 1 Phase 1 Ngong Ping Sewage Treatment Works and Sewerage Investigation, Design and Construction. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

Ove Arup and Partners Ltd. (2007). North-east New Territories Landfill Extension. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

Ove Arup and Partners Ltd. (2009). Hong Kong - Zhuhai - Macau Bridge. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

Ove Arup and Partners Ltd. (2013a). Lok Ma Chau Loop Development. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.

­­

Ove Arup and Partners Ltd. (2013b). Northeast New Territories New Development Areas. Environmental Impact Assessment Report to Hong Kong S.A.R. Government.