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Study on carnivorous fish of Sri Lanka

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Channa orientalis also known as the Ceylon snakehead is the only pelvic-fin less snakehead in Sri Lanka.

 

by Ifham Nizam

A team of ichthyologists in their latest study on carnivorous fish of Sri Lanka points out that Channa orientalis also known as the Ceylon snakehead, is the only pelvic-fin less snakehead in Sri Lanka.

Snakeheads are one of the main carnivorous groups of freshwater fish in Sri Lanka. They belong to the family Channidae and the genus Channa. There are six species of Channa in Sri Lanka, two of which are endemic. The two endemic species are Channa ara and Channa orientalis. Channa orientalis also known as the Ceylon snakehead is the only pelvic-fin less snakehead in Sri Lanka.

The latest study on the genetic diversity and morphological stasis in the Ceylon Snakehead found that the taxonomic identity and the type locality of this species were not certain.

Scientist Hiranya Sudasinghe told The Island yesterday: “We show that C. orientalis is composed of two geographically and genetically distinct lineages but which show remarkable morphological similarity between the two lineages. The recognition of two distinct genetic lineages is important because, when it comes to conservation management of this species, these two lineages could be recognised as two Evolutionary Significant Units that would deserve separate conservation attention.”

“We argue that the type locality of C. orientalis is south-western Sri Lanka, to which the species is endemic. Channa orientalis is distinguished from other species of Channa by the absence of pelvic fins, adult colouration in life, dorsal- and anal-fin ray counts, number of vertebrae, and scale counts,” the team pointed out.

This species feeds like a ciclids, experts point out.

The team of scientists comprises of Hiranya Sudasinghe of Evolutionary Ecology and Systematics Lab, Department of Molecular Biology and Biotechnology, University of Peradeniya, Peradeniya, Sri Lanka/ Postgraduate Institute of Science, University of Peradeniya, Peradeniya, SriLanka, R.H.Tharindu Ranasinghe of Butterfly Conservation Society of Sri Lanka, Rohan Pethiyagoda of  Ichthyology Section, Australian Museum, 1 William Street, Sydney, NSW 2010, Australia, Madhava Meegaskumbura of  Guangxi Key Laboratory of Forest Ecology & Conservation, College of Forestry, Guangxi University, Nanning, People’s Republic of China and Ralf Britz Senckenberg Naturhistorische Sammlungen Dresden, Museum für Tierkunde, Königsbrücker Landstrasse 159, 01109 Dresden, Germany

As the type species of the genus Channa, the identity of the pelvic-finless snakehead Channa orientalis Bloch is important to channid systematics. Although this name has been attached to a Sri Lankan species for the past 160 years, its vaguely specified type locality, ‘India Orientali’, has long cast doubt as to its origin.

Based on a collection across its range in the island and analysis of the cytochrome c oxidase subunit 1 (cox1) barcoding gene, scientists show that the Sri Lankan pelvic-finless Channa is composed of two geographically discrete lineages separated by an uncorrected pairwise cox1 genetic distance of 6.9–8.1%.

The minimum genetic distance between these two lineages and other species of the Gachua group of Channa is 5.1%. Despite their genetic divergence, the two lineages exhibit remarkable morphological stasis: they are indistinguishable from each other in external morphology.

 



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SJB alleges Prez under SLPP pressure to give up power to dissolve Parliament

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By Shamindra Ferdinando

Samagi Jana Balavegaya (SJB) lawmaker Nalin Bandara Jayamaha yesterday alleged that President Ranil Wickremesinghe was under tremendous pressure from the Sri Lanka Podujana Peramuna (SLPP) to give up power to dissolve Parliament, two and a half years after the parliamentary election.

Kurunegala District MP Jayamaha said that the SLPP wanted the provision, pertaining to dissolution of Parliament in the 19A, included in the 22nd Amendment, at the committee stage.

In terms of the 19th Amendment enacted in 2015, the President couldn’t dissolve Parliament until the completion of four and a half years of the term of a government. The last parliamentary poll was conducted in August 2020.

Having overwhelmingly voted for UNP leader Wickremesinghe at the Presidential contest on July 20 to complete the remainder of President Gotabaya Rajapaksa’s term, the SLPP was now seeking full control, lawmaker Bandara asserted.

The SJB official, however, acknowledged that their party, too, had been divided on the issue, with those who backed Dullas Alahapperuma, at the Presidential contest, opposing the move.

Wickremesinghe received 133 votes. Of the 145 SLPP votes, except for its rebel group, the rest voted for Wickremesinghe.

Responding to another question, the former UNPer said that some interested parties thwarted SLPP founder Basil Rajapaksa from leaving the country, soon after President Gotabaya Rajapaksa abandoned the President’s House. That appeared to have backfired, MP Bandara said, alleging Basil Rajapaksa seemed to be running the show.

Asked whether more members of the SJB would soon switch their allegiance to President Wickremesinghe, MP Bandara said that he couldn’t predict what the individual members were likely to do. However, the SJB, the second largest group in Parliament wouldn’t join the government, MP Bandara said.

Of the 54 elected and appointed SJB members, so far two – Manusha Nanayakkara and Harin Fernando – have accepted ministerial portfolios. SJB National List MP Diana Gamage, earlier pledged her support to the SLPP.

Lawmaker Bandara said that the SLPP seemed to be quite confident of regaining full political authority, regardless of the recent setbacks suffered. The former Law and Order Deputy Minister said that the SLPP was bent on pursuing its strategy, though the President, elected by the party, fled the country.

The SJB MP said that the move to create an environment, conducive for crossovers for the personal benefit of lawmakers, should be condemned. The provisions, pertaining to the appointment of the Cabinet-of-Ministers, under the proposed 22 Amendment, in case the party with the largest block of seats reached a consensus with other parties, were meant to appoint a jumbo sized Cabinet, the MP said. The SJB official questioned the rationale in giving Parliament the authority to decide on the number of Cabinet ministers and non-Cabinet members, in case of a National Government.

Lawmaker Bandara said that President Wickremesinghe and the SLPP were yet to come up with tangible action plan to address political or economic issues. The MP warned, what he called the Wickremesinghe-Rajapaksa government, that the public here, and the international community, couldn’t be deceived by calling itself a National Government.

The SJB spokesperson said that they wouldn’t contribute, or facilitate, the Wickremesinghe-Rajapaksa ploy by accepting ministerial portfolios. “We won’t legitimize the government project. How can the SLPP still be acceptable, after the public rejected Gotabaya Rajapaksa, elected by them,” MP Bandara said, adding the SLPP seemed to have conveniently forgotten that the public rejected the ministers, along with their highly overrated President.

The outspoken MP said that it would be a grave mistake, on the SLPP’s part, if its leadership believed the unprecedented crisis, caused by them, could be resolved by getting rid of President Gotabaya Rajapaksa.

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22 A: Karu J, too, makes some suggestions

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Chairman of the National Movement for Social Justice, Karu Jayasuriya, said that fears expressed by members of Parliament, and others, over the provisions, pertaining to the appointment of Cabinet of Ministers, were not unfounded.

The former Speaker said that he was also concerned about allegations that the proposed 22 A could be abused and exploited to appoint a jumbo Cabinet.

Jayasuriya suggested that political parties, represented in Parliament, and other interested parties should address whatever concerns raised as regards the 22 Amendment.

The yahapalana Speaker said that the success of the whole process would depend on the readiness of all those involved in the new constitution making endeavor to address issues at hand. The accusation that a particular provision (47 [4]) could be used to violate the restriction of cabinet ministers to 30 and no-cabinet members to 40 couldn’t be ignored, Jayasuriya said.

Jayasuriya said that those who represented the parliament should inquire into criticism over the Speaker receiving an opportunity to nominate three civil society members to the 10-member Constitutional Council in consultation with the Prime Minister and the Opposition Leader. The former Gampaha District MP recalled that in terms of the 19 Amendment, the Prime Minister and the Opposition Leader used to nominate the civil society members. Jayasuriya said that whatever knotty issues could be tackled at the committee stage (SF)

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“Govt workers, too, were involved in fuel hoarding”

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It had become obvious that some government workers, too, were involved in hoarding fuel and selling it in the black market, D.V Shantha Silva, joint Secretary the Sri Lanka Petroleum Private Tanker Owners’ Association (SLPPTOA) said yesterday, addressing the media.

He said that the introduction of the national fuel pass system is successful and the majority of fuel stations followed the system.

“Some gas stations still try to manipulate the system but it won’t be easy,” he said.

There is no congestion in gas stations and SLPPTOA members are happy with the process, he said.

“However, there is a drop in orders from gas stations. In the last few months, before the QR system, one tanker load was only enough for a few hours. But now gas stations pump fuel for days with one shipment,” he said.

Silva said that many people tried to blame three-wheeler drivers for hoarding fuel. However, there were other actors involved in the racket, among them were government officials.

“Before the QR system we saw a large number of people at gas stations each morning accessing fuel using various passes. Now that doesn’t happen and there is no congestion,” he said. (RK)

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