Next Article in Journal
Real-Time Probabilistic Flood Forecasting Using Multiple Machine Learning Methods
Next Article in Special Issue
Using the Freshwater Health Index to Assess Hydropower Development Scenarios in the Sesan, Srepok and Sekong River Basin
Previous Article in Journal
Trends and Challenges in Irrigation Scheduling in the Semi-Arid Area of Spain
Article

Influence of Local Habitat and Climatic Factors on the Distribution of Fish Species in the Tonle Sap Lake

1
Laboratoire Evolution & Diversité Biologique, UMR5174 EDB CNRS-Université Paul Sabatier-ENFA, F-31062 Toulouse, France
2
Centre for Biodiversity Conservation, Royal University of Phnom Penh, Russian Confederation Blvd, Phnom Penh 12000, Cambodia
3
Wonders of the Mekong Project, #186, Preah Norodom Blvd., P.O. Box 582, Phnom Penh 12000, Cambodia
4
Department of Biology, University of Nevada, 1664 N. Virginia Street, Reno, NV 89557, USA
5
Inland Fisheries Research and Development Institute, Fisheries Administration, #186, Preah Norodom Blvd., P.O. Box 582, Phnom Penh 12000, Cambodia
*
Author to whom correspondence should be addressed.
Water 2020, 12(3), 786; https://doi.org/10.3390/w12030786
Received: 14 February 2020 / Revised: 27 February 2020 / Accepted: 3 March 2020 / Published: 12 March 2020
Tonle Sap Lake (TSL) is a highly productive system and hosts a high fish diversity and is of paramount importance for sustaining protein supply for over 15 million Cambodians. Nevertheless, the ecology and factors influencing the spatial distribution of many fishes within the lake remain poorly understood. Using commercial fishing lot catch data from 1994/1995 to 1999/2000, fishing seasons and environmental data (land cover and bioclimatic variables), we describe spatial distribution of the eight most commercially important fish species, and investigate the effects of environmental factors on their distributions in the TSL. We found a strong variability in fish biomass across areas and between species. Specifically, Channa micropeltes was most abundant in the southern and northern sections of the TSL. Channa striata and Trichopodus microlepis were more common in the northern part of the TSL. Cyclocheilos enoplos, Barbonymus gonionotus, Pangasianodon hypophthalmus, and Gymnostomus spp. were abundant in the southern areas of the TSL while Phalacronotus spp. were abundant in few areas in both the north and the south. Flooded forest positively explained the variation in the biomass of P. hypophthalmus, C. striata, C. enopolos, and Phalacronotus spp. Likewise, the lake’s open water positively affects the biomass of P. hypophthalmus, C. enopolos, and Phalacronotus spp., while the agricultural field negatively impacts Gymnostomus spp. biomass distribution. We also found that some areas consistently hosted high fish biomass (e.g., lot 2, Kampong Thom; lot 6, Pursat; lot 2, Battambang, etc.). We, therefore, suggest that fisheries management and conservation planning focus on those areas, considering those areas significance as core fish habitat and important for catching fish. View Full-Text
Keywords: species distribution; land cover change; climatic variable; generalized linear model; floodplain fisheries species distribution; land cover change; climatic variable; generalized linear model; floodplain fisheries
Show Figures

Figure 1

MDPI and ACS Style

Chan, B.; Brosse, S.; Hogan, Z.S.; Ngor, P.B.; Lek, S. Influence of Local Habitat and Climatic Factors on the Distribution of Fish Species in the Tonle Sap Lake. Water 2020, 12, 786. https://doi.org/10.3390/w12030786

AMA Style

Chan B, Brosse S, Hogan ZS, Ngor PB, Lek S. Influence of Local Habitat and Climatic Factors on the Distribution of Fish Species in the Tonle Sap Lake. Water. 2020; 12(3):786. https://doi.org/10.3390/w12030786

Chicago/Turabian Style

Chan, Bunyeth, Sébastien Brosse, Zeb S. Hogan, Peng B. Ngor, and Sovan Lek. 2020. "Influence of Local Habitat and Climatic Factors on the Distribution of Fish Species in the Tonle Sap Lake" Water 12, no. 3: 786. https://doi.org/10.3390/w12030786

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop