Urban stormwater ponds in Singapore: potential pathways for spread of alien freshwater fishes

Kwik, Jeffrey T. B.; Kho, Zi Yi; Quek, B. S.; Tan, Heok Hui

doi:10.3391/bir.2013.2.3.11

Cited by 16 publications

(9 citation statements)

References 20 publications

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“…Whilst we cannot exclude that some existing cost data may have not been captured by the InvaCost database, this taxonomic discrepancy should be discussed. Singapore has a history of freshwater species introductions (Yeo and Chia 2010;Ng et al 2010;Liew et al 2012;Ng and Yeo 2012;Kwik et al 2013;Ng et al 2015Ng et al , 2016a. Accidental releases/escapes aside, key drivers of intentional releases can often be cultural (e.g.…”

Section: Discussionmentioning

confidence: 99%

Biological invasions in Singapore and Southeast Asia: data gaps fail to mask potentially massive economic costs

Haubrock¹,

Cuthbert²,

Yeo³

et al. 2021

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The impacts of invasive alien species are well-known and are categorised as a leading contributor to biodiversity loss globally. However, relatively little is known about the monetary costs incurred from invasions on national economies, hampering management responses. In this study, we used published data to describe the economic cost of invasions in Southeast Asia, with a focus on Singapore – a biodiversity-rich, tropical island city state with small size, high human density and high trade volume, three factors likely to increase invasions. In this country, as well as in others in Southeast Asia, cost data were scarce, with recorded costs available for only a small fraction of the species known to be invasive. Yet, the overall available economic costs to Singapore were estimated to be ~ US$ 1.72 billion in total since 1975 (after accounting for inflation), which is approximately one tenth of the total cost recorded in all of Southeast Asia (US$ 16.9 billion). These costs, in Singapore and Southeast Asia, were mostly linked to insects in the family Culicidae (principally Aedes spp.) and associated with damage, resource loss, healthcare and control-related spending. Projections for 11 additional species known to be invasive in Singapore, but with recorded costs only from abroad, amounted to an additional US$ 893.13 million, showing the potential huge gap between recorded and actual costs (cost records remain missing for over 90% of invasive species). No costs within the database for Singapore – or for other Southeast Asian countries – were exclusively associated with proactive management, highlighting that a shortage of reporting on the costs of invasions is mirrored by a lack of investment in management. Moreover, invasion cost entries in Singapore were under-reported relative to import levels, but total costs exceeded expectations, based on land area and population size, and to a greater extent than in other Southeast Asian countries. Therefore, the evaluation and reporting of economic costs of invasions need to be improved in this region to provide efficient data-based support for mitigation and management of their impacts.

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Section: Discussionmentioning

confidence: 99%

Biological invasions in Singapore and Southeast Asia: data gaps fail to mask potentially massive economic costs

Haubrock¹,

Cuthbert²,

Yeo³

et al. 2021

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“…In addition, the Mayan cichlid, Mayaheros urophthalmus, (and hybrids of this species), which is endemic to the Atlantic slope of Central America, has been traded as an aquarium fish worldwide (Nico et al 2007). It has been documented in some parts of Southeast Asia, including Singapore, Sulawesi in Indonesia, around Manila Bay in the Philippines and the lowermost Chao Phraya River basin in Thailand (Nico et al 2007;Herder et al 2012;Kwik et al 2013;Ordoñez et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Food habits of three non-native cichlid fishes in the lowermost Chao Phraya River basin, Thailand

Tomojiri

Musikasinthorn

Iwata

2019

Journal of Freshwater Ecology

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The food habits of three non-native cichlid fishes, Mayan cichlid (Mayaheros urophthalmus), Mozambique tilapia (Oreochromis mossambicus) and Nile tilapia (O. niloticus), in the lowermost Chao Phraya River basin, Thailand, was examined by stomach contents analysis. The index of preponderance, an index of the importance of prey items, was calculated from two relative metrics of prey quantity: percent frequency and percent volume. The index of niche breadth and the overlap coefficient were calculated to compare the breadth of food habits among the size classes and species groups. The M. urophthalmus mainly preyed on fish scales, detritus and aquatic invertebrates (molluscs and crustaceans). The O. mossambicus and O. niloticus fed mostly on detritus. The diets of the latter two species overlapped almost completely; however, green filamentous algae mixed with detritus was observed in the diet of the O. niloticus only. The observation that fish scales were a predominant food source in the stomach of M. urophthalmus (high importance value 45.48%) was specific to this study area.

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“…Studies that carried out multivariate analyses and/or statistical modelling to describe relationships between diversity metrics and environmental factors made up 42.5% ( n = 17) of these 40 papers (Figure 5b). Besides these, there were another nine papers that focused on the feeding habits of birds in urban areas (Murray et al, 2018; Varner et al, 2014), introduced fish species presence (Kwik et al, 2013), and wetland plant species composition change (Hettiarachchi, Morrison, et al, 2014b).…”

Section: Resultsmentioning

confidence: 99%

“…There was a limited number of studies ( n = 4) on problem or nuisance species (Kwik et al, 2013, 2020; Reis et al, 2018; Sareein et al, 2019). Urban stormwater ponds in Singapore were found to be populated with tolerant, non‐native fish species that were considered to potentially endanger native fish species if they spread to natural sites (Kwik et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

A review of current knowledge and research priorities for conservation of lentic biodiversity in tropical wet and monsoonal urban landscapes

et al. 2022

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1. Urban expansion is a major threat to diversity, especially in rapidly developing tropical countries where urban areas are growing at great pace and protection is limited.2. We conducted a systematic review of published research on the ecology of lentic habitats in tropical urban areas. The review focused on understanding: (1) how much is currently known about the biodiversity of these habitats; (2) whether this knowledge is biased towards certain taxonomic groups and/or geographic areas;(3) what is known about the factors influencing their diversity; and (4) which ecosystem services urban lentic habitats provide. The review aimed to establish whether existing knowledge is sufficient to help guide conservation and provide evidence to policy makers of the importance of conserving tropical urban wetlands.3. We found 64 papers that addressed questions about the diversity and/or distribution of lentic ecosystems within tropical urban areas. Papers came from 15 countries, although almost half (45%) were from India; relatively few countries from Southeast Asia, tropical Africa, or South America were represented in the literature.

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Urban stormwater ponds in Singapore: potential pathways for spread of alien freshwater fishes

Cited by 16 publications

References 20 publications

Biological invasions in Singapore and Southeast Asia: data gaps fail to mask potentially massive economic costs

Biological invasions in Singapore and Southeast Asia: data gaps fail to mask potentially massive economic costs

Food habits of three non-native cichlid fishes in the lowermost Chao Phraya River basin, Thailand

A review of current knowledge and research priorities for conservation of lentic biodiversity in tropical wet and monsoonal urban landscapes

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