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Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia

There has been a recent increase in the occurrence and proliferation of alien fish species in rivers, lakes, and reservoirs of Malaysia, posing a significant risk to native biodiversity. This increase has been largely caused by the unmanaged aquaculture and aquarium pet trade. At present, very littl...

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Main Authors: Vythalingam, Lavanya Malini, Raghavan, Rajeev, Hossain, M. A. Motalib, Bhassu, Subha
Format: Article
Published: Wiley 2022
Subjects:
QH426 Genetics
SD Forestry
Online Access:http://eprints.um.edu.my/33740/
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spelling my.um.eprints.337402022-04-28T05:25:54Z http://eprints.um.edu.my/33740/ Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia Vythalingam, Lavanya Malini Raghavan, Rajeev Hossain, M. A. Motalib Bhassu, Subha QH426 Genetics SD Forestry There has been a recent increase in the occurrence and proliferation of alien fish species in rivers, lakes, and reservoirs of Malaysia, posing a significant risk to native biodiversity. This increase has been largely caused by the unmanaged aquaculture and aquarium pet trade. At present, very little information is available on the diversity and distribution of alien fish species in freshwater ecosystems of Malaysia, as well as their current and future threats. Using the MaxEnt model, the potential habitat suitability and future invasion ranges of six alien fish species (Cichla ocellaris, Clarias gariepinus, Oreochromis mossambicus, Oreochromis niloticus, Poecilia reticulata, and Pterygoplichthys pardalis) in Peninsular and East Malaysia (Borneo) were determined. All six alien fish species investigated, have high potential to invade eight states in Peninsular Malaysia (Johor, Kelantan, Malacca, Negeri Sembilan, Pahang, Perak, Selangor, and Terengganu), and much of East Malaysia. The results also indicate that alien fish are likely to invade the majority of the 444 protected areas in the country, particularly those located in Sabah and Sarawak, which are known for their high fish diversity and endemism. Minimum temperature of the coldest month (Bio 6) and isothermality (Bio 3) significantly influence potential invasion habitats for all six alien fish species in Malaysia. The country's hot and humid climate makes it ideal for the survival and proliferation of alien species except for P. pardalis. These findings will help conservation planners and managers in identifying areas of high concern for alien freshwater fish species in Malaysia, and to pre-emptively mitigate and manage their future invasion. Wiley 2022-01 Article PeerReviewed Vythalingam, Lavanya Malini and Raghavan, Rajeev and Hossain, M. A. Motalib and Bhassu, Subha (2022) Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia. Aquatic Conservation-Marine And Freshwater Ecosystems, 32 (1). pp. 157-170. ISSN 1052-7613, DOI https://doi.org/10.1002/aqc.3729 <https://doi.org/10.1002/aqc.3729>. 10.1002/aqc.3729
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QH426 Genetics
SD Forestry
spellingShingle QH426 Genetics
SD Forestry
Vythalingam, Lavanya Malini
Raghavan, Rajeev
Hossain, M. A. Motalib
Bhassu, Subha
Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
description There has been a recent increase in the occurrence and proliferation of alien fish species in rivers, lakes, and reservoirs of Malaysia, posing a significant risk to native biodiversity. This increase has been largely caused by the unmanaged aquaculture and aquarium pet trade. At present, very little information is available on the diversity and distribution of alien fish species in freshwater ecosystems of Malaysia, as well as their current and future threats. Using the MaxEnt model, the potential habitat suitability and future invasion ranges of six alien fish species (Cichla ocellaris, Clarias gariepinus, Oreochromis mossambicus, Oreochromis niloticus, Poecilia reticulata, and Pterygoplichthys pardalis) in Peninsular and East Malaysia (Borneo) were determined. All six alien fish species investigated, have high potential to invade eight states in Peninsular Malaysia (Johor, Kelantan, Malacca, Negeri Sembilan, Pahang, Perak, Selangor, and Terengganu), and much of East Malaysia. The results also indicate that alien fish are likely to invade the majority of the 444 protected areas in the country, particularly those located in Sabah and Sarawak, which are known for their high fish diversity and endemism. Minimum temperature of the coldest month (Bio 6) and isothermality (Bio 3) significantly influence potential invasion habitats for all six alien fish species in Malaysia. The country's hot and humid climate makes it ideal for the survival and proliferation of alien species except for P. pardalis. These findings will help conservation planners and managers in identifying areas of high concern for alien freshwater fish species in Malaysia, and to pre-emptively mitigate and manage their future invasion.
format Article
author Vythalingam, Lavanya Malini
Raghavan, Rajeev
Hossain, M. A. Motalib
Bhassu, Subha
author_facet Vythalingam, Lavanya Malini
Raghavan, Rajeev
Hossain, M. A. Motalib
Bhassu, Subha
author_sort Vythalingam, Lavanya Malini
title Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
title_short Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
title_full Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
title_fullStr Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
title_full_unstemmed Predicting aquatic invasions in a megadiverse region: Maximum-entropy-based modelling of six alien fish species in Malaysia
title_sort predicting aquatic invasions in a megadiverse region: maximum-entropy-based modelling of six alien fish species in malaysia
publisher Wiley
publishDate 2022
url http://eprints.um.edu.my/33740/
_version_ 1735409585680809984
score 13.211869

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