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Researchers discover new variant of Sri Lankan aquarium fish

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by Ifham Nizam

A new variant of a popular Sri Lankan aquarium fish has been discovered by local and foreign researchers.

The freshwater fish, genus Rasbora, (commonly called ‘dandiya’) is one of the most diverse groups of freshwater fishes in tropical Asia.

In Sri Lanka, previous studies have shown that there are five species (Rasbora dandia, R. microcephalus, R. wilpita, R. naggsi, and R. armitagei) of which the last three are endemic to the island. This diversity is remarkable when compared with peninsular India, which is about 25 times the size of Sri Lanka but contain only four species of Rasbora.

Biologists earlier believed there were only five varieties of the popular aquarium fish endemic to Sri Lanka. However, with the discovery of the sixth species, Rasbora has gained a new reputation among Sri Lankan freshwater fish breeders, hobbyists and harvesters.

The researchers carried out multiple analysis using “finer geographic sampling and greater sample sizes”, thereby corroborating the validity of six species of Rasbora (scientifically called as ‘Cyprinidae’) in Sri Lanka.

The team of researchers have combed a sampling of 90 sites across Sri Lanka to identify the new species. The team consisting of Hiranya Sudasinghe of Evolutionary Ecology and Systematics Lab, Department of Molecular Biology and Biotechnology, University of Peradeniya, Rohan Pethiyagoda of Ichthyology Section, Australian Museum, Sydney, NSW, Australia, Ranasinghe Hettiarachchige Tharindu Ranasinghe of Butterfly Conservation Society of Sri Lanka, Malwana, Rajeev Raghavan of Department of Fisheries Resource Management, Kerala University of Fisheries and Ocean Studies (KUFOS), Kochi, India, Neelesh Dahanukar of Indian Institute of Science Education and Research (IISER), Pune, India and Madhava Meegaskumbura of Guangxi Key Laboratory of Forest Ecology & Conservation, College of Forestry, Guangxi University, Nanning, China.

Sudasinghe told The Sunday Island that more extensive sampling of Rasbora in India, and analysis based on multiple markers may reveal “a more complex phylogenetic topology” (diversity).

“The Sri Lankan diversification derives from a common ancestor which arrived from India during a sea-level low-stand in the mid-Miocene (15.1 Ma [95% HPD: 11.5–19.8 Ma]), when the present-day island was sub aerially connected to the Indian subcontinent by a broad isthmus”, he added.

Rasbora is generally believed to have arrived in the island from the Indian sub-continent centuries ago when Sri Lanka stood geographically merged with India.  In the latest study, researchers confirm this belief.

“Our analysis suggest that Sri Lankan Rasbora derive from a Mid Miocene, India to Sri Lanka dispersal”, he noted, and added that Sri Lankan Rasbora diversity is higher than that of the Indian peninsula.

The Sri Lankan diversity of Rasbora provides an opportunity to understand the evolutionary and phylogenetic relationships of freshwater fishes in the island. Understanding the bio geography, phylogenetic and the evolutionary relationships of species are pivotal in formulating effective assessments of the conservation status of species as well as to draw up species conservation management plans.

However, such studies are still at very early stages when it comes to the freshwater fishes in Sri Lanka.

The first-ever molecular phylogeny of Sri Lankan Rasbora and reassess the taxonomic identities of the five species of Sri Lankan Rasbora based on an island-wide survey. In this study, based on molecular, morphological and statistical analyses using finer geographic sampling, validate the five putative species of Rasbora previously recognized in Sri Lanka.

In addition, a new species of Rasbora was discovered from eastern Sri Lanka. This new species was named Rasbora adisi. The species name “adisi” means mysterious or enigmatic in Sinhala: an allusion to the cryptic nature of this species.

The new species is found in eastern basins in Sri Lanka such as Gal Oya, Menik River and Kumbukkan River and show the closest resemblance to Rasbora naggsi. However, the new species is different from R. naggsi by a combination of morphological characters in addition to been genetically distinct.

 



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Landslide Early Warnings issued to the Districts of Badulla, Kandy, Matale, Monaragala and Nuwara Eliya

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The Landslide Early Warning Center of the the National Building Research Organaisation [NBRO] has issued landslide early warnings to the districts of Badulla, Kandy, Matale, Monaragala and Nuwara Eliya for a period of 24 hours effective from 1200 noon today [07th January].

Accordingly,
LEVEL III RED landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Udadumbara in the Kandy district, and Nildandahinna and Walapane in the Nuwara Eliya district.

LEVEL II AMBER landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Kandaketiya in the Badulla district, Wilgamuwa in the Matale district, and Mathurata and Hanguranketha in the Nuwara Eliya district.

LEVEL I YELLOW landslide early warnings have been issued to the divisional secretaries divisions and surrounding areas of Meegahakiwula, Lunugala, Welimada, Passara, Badulla and Hali_Ela in the Badulla district, Doluwa in the Kandy district,Ambanganga Korale in the Matale district, and Bibile in the Monaragala district

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Prez seeks Harsha’s help to address CC’s concerns over appointment of AG

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Chairman of the Committee on Public Finance (CoPF), MP Dr. Harsha de Silva, told Parliament yesterday that President Anura Kumara Dissanayake had personally telephoned him in response to a letter highlighting the prolonged delay in appointing an Auditor General, a vacancy that has remained unfilled since 07 December.

Addressing the House, Dr. de Silva said the President had contacted him following the letter he sent, in his capacity as CoPF Chairman, regarding the urgent need to appoint the constitutionally mandated head of the National Audit Office. During the conversation, the President had sought his intervention to inform the Constitutional Council (CC) about approving the names already forwarded by the President for consideration.

Dr. de Silva said the President had inquired whether he could convey the matter to the Constitutional Council after their discussion. He stressed that both the President and the CC must act in cooperation and in strict accordance with the Constitution, warning that institutional deadlock should not undermine constitutional governance.

He also raised concerns over the Speaker’s decision to prevent the letter he sent to the President from being shared with members of the Constitutional Council, stating that this had been done without any valid basis. Dr. de Silva subsequently tabled the letter in Parliament.

Last week, Dr. de Silva formally urged President Dissanayake to immediately fill the Auditor General’s post, warning that the continued vacancy was disrupting key constitutional functions. In his letter, dated 22 December, he pointed out that the absence of an Auditor General undermines Articles 148 and 154 of the Constitution, which vest Parliament with control over public finance.

He said that the vacancy has severely hampered the work of oversight bodies such as the Committee on Public Accounts (COPA) and the Committee on Public Enterprises (COPE), particularly at a time when the country is grappling with a major flood disaster.

As Chair of the Committee responsible for overseeing the National Audit Office, Dr. de Silva stressed that a swift appointment was essential to safeguard transparency, accountability and financial oversight.

In a separate public statement, he warned that Sri Lanka was operating without its constitutionally mandated Chief Auditor at a critical juncture. In a six-point appeal to the President, Dr. de Silva emphasised that an Auditor General must be appointed urgently in the context of ongoing disaster response and reconstruction efforts.

“Given the large number of transactions taking place now with Cyclone Ditwah reconstruction and the yet-to-be-legally-established Rebuilding Sri Lanka Fund, an Auditor General must be appointed urgently,” he said in a post on X.

By Saman Indrajith

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Govt. exploring possibility of converting EPF benefits into private sector pensions

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The NPP government was exploring the feasibility of introducing a regular pension, or annuity scheme, for Employees’ Provident Fund (EPF) contributors, Deputy Minister of Labour Mahinda Jayasinghe told Parliament yesterday.

Responding to a question raised by NPP Kalutara District MP Oshani Umanga in the House, Jayasinghe said the government was examining whether EPF benefits, which are currently paid as a lump sum at retirement, could instead be converted into a system that provides regular payments throughout a retiree’s lifetime.

“We are looking at whether it is possible to provide a pension,” Jayasinghe said, stressing that there was no immediate plan to abolish the existing lump-sum payment. “But we are paying greater attention to whether a regular payment can be provided throughout their retired life.”

Jayasinghe noted that the EPF was established as a social security mechanism for private sector employees after retirement and warned that receiving the entire fund in a single installment could place retirees at financial risk, particularly as life expectancy increases.

He also cautioned that interim withdrawals from the EPF undermined its long-term sustainability. “Even the interim payments that are given from time to time undermine the ability to give security at the time of retirement,” he said, distinguishing the EPF from the Employees’ Trust Fund, which provides more frequent interim benefits.

Addressing concerns over early withdrawals, the Deputy Minister explained that contributors have been allowed to withdraw up to 30 percent of their EPF balance since 2015, with a further 20 percent permitted after 10 years, subject to specific conditions and documentary proof.

Of 744 applications received for such withdrawals, 702 had been approved, he said.

The proposed shift towards an annuity-based system comes amid broader concerns over Sri Lanka’s ageing population and pressures on retirement financing. While state sector employees receive pensions funded by taxpayers, including EPF contributors, the EPF itself has been facing growing strain as it is also used to finance budget deficits.

Jayasinghe said the government’s focus was to formulate a mechanism that would ensure long-term income security for private sector employees, placing them on a footing closer to a pension scheme rather than a one-time retirement payout.

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