news
Study identifies distinct frog species not belonging to generic ‘hourglass’ classification
by Ifham Nizam
A study on the abnormalities and polymorphisms of amphibians found within and outside the Horton Plains National Park has identified a distinct frog species that does not belong to its generic “hourglass frog” classification.
The study was conducted by graduate research assistant Praneeth Silva of Sri Jayewardenepura University’s Department of Zoology under the supervision of Prof. W. A. D. Mahaulpatha, senior lecturer and head, Department of Zoology.
“Our study on amphibian abnormalities and causes found that Taruga eques species is faced with bigger threats in both localities in comparison to other amphibian species”, Silva told The Sunday Island.
Within and outside regions of the Sri Lankan Plains, habitat modifications due to human activities were the main threat on Taruga eques. The study also found that natural predators were the main cause for formation of amphibian abnormalities found within the Plains.
The study revealed a novel pattern polymorphism of Taruga eques in that a variety of the species without the hourglass was identified within and outside the Plains, indicating that the common name Taruga eques cannot be broadly classified as an “hour-glass frog”. At the end of the study, new six dorsal colour variations and five dorsal pigment patterns of Taruga eques could be newly introduced to the science.
Amphibian body colouration and pigment patterns play a vital role for their survival in the environment. Polymorp-hism (happening together in the same habitat of two or more distinct species results in rarest of them getting mutated to be like the main species) has probably led Taruga eques to be seen as hourglass tree frog though in reality the situation is likely to be rather different.
Silva said that a total of 694 amphibians belonging to four families and 11 species were recorded in five lentic water bodies which were studied. Five hundred and eleven (511) individuals were examined inside the Plains and 183 outside the region. Of the 511 individuals, only 4.5 percent of the amphibians had abnormalities. Of the 183 individuals examined outside the Plains, 80.87 percent had abnormalities.
Of the 511 inspected amphibians within the Plains, 0.59 percent suffered from ectromelia and four percent had cysts. Of the 183 amphibians examined outside the Plains, 80.33 percent had cysts and 0.55 percent had femoral projections. Cysts accounted for most of the abnormalities in both environments. Most of the infections (60 percent) recorded in the amphibians inside the Plains were mild. In contrast 77.55 percent of the infections recorded in the amphibians outside the Plains were moderate.
A research associate attached to the University of Indonesia Research Centre for Climate Change Thasun Amarasinghe said that not only hourglass tree frogs but almost all amphibians in Sri Lanka are under threat.
“They are called hourglass tree frogs as they have a colour pattern like an hour glass mark on their dorsum (back). They are highland species, and are very sensitive to temperature and humidity so in addition to habitat loss and forest fragmentation, there will be a future threat to them due to climate change”, he warned.
The major conclusion of the study was the natural selection results in the ‘polymorphisms’ to face the threat of predation. Moreover, colour and pattern polymorphisms manifest due to strong selection by visually oriented predators and the polymorphisms are highly valuable for the species to ensure their survival in the environment, while helping them to avoid abnormalities.
(Pix courtesy Praneeth Silva)
Author
- News Advertiesment
See Kapruka’s top selling online shopping categories such as Toys, Grocery, Flowers, Birthday Cakes, Fruits, Chocolates, Clothing and Electronics. Also see Kapruka’s unique online services such as Money Remittence,News, Courier/Delivery, Food Delivery and over 700 top brands. Also get products from Amazon & Ebay via Kapruka Gloabal Shop into Sri Lanka.
Author
-
sdfsdf sdf sf sf sdf sf sdf
Author
PCoI on Easter Sunday attacks:
By Shamindra Ferdinando
Attorney General Dappula de Livera, PC is not bound by recommendations made by the Presidential Commission of Inquiry (P CoI) into the 2019 Easter Sunday carnage, or presidential directives in that regard, according to authoritative sources.
They said that the AG couldn’t under any circumstances initiate legal proceedings until he had received the full PCoI report.
President Gotabaya Rajapaksa received the PCoI report on Feb 1. The President’s Office delivered a set of PCoI reports to Speaker Mahinda Yapa Abeywardena on Feb 23, a day after the report was presented to the cabinet of ministers. The Island raised the matter with relevant authorities in the wake of a section of the media reporting the PCoI recommending punitive measures against former President Maithripala Sirisena, Defence Secretary Hemasiri Fernando, IGP Pujitha Jayasundera, Chief of State Intelligence Senior DIG Nilantha Jayawardena, Chief of National Intelligence retired DIG Sisira Mendis and All Ceylon Makkal Congress (ACMC) leader and Samagi Jana Balavegaya MP Rishad Bathiudeen et al over the Easter Sunday carnage.
Sources pointed out that due to the inordinate delay in sharing the PCoI report with the AG, the department hadn’t been able to take preliminary measures required to initiate the proceedings. Sources said that a team of officers would take at least six weeks or more to examine the report before tangible measures could be taken.
With the AG scheduled to retire on May 24, 2021, even if the AG Department received the P CoI it would be quite a tough task to initiate proceedings ahead of retirement, sources said. However, in terms of the 20th Amendment to the Constitution enacted in last October, both the AG and the IGP could receive extensions beyond 60 at the President’s discretion.
Dappula de Livera received an Acting appointment as the AG a week after the Easter Sunday carnage whereas his predecessor Jayantha Jayasuriya, PC, was elevated to Chief Justice.
Responding to another query, sources said that the Attorney General two weeks ago requested Secretary to the President for a copy of the P CoI. However, the AG was yet to receive one, sources said. In spite of the AG not receiving a P CoI copy, the AG had instructed the IGP to obtain a copy of the report when he requested the police to complete investigations into the Easter Sunday carnage. The AG issued specific instructions after having examined police files pertaining to the investigations.
The IGP, too, hadn’t received a copy so far though some sections of the report were in the public domain.
Agriculture Minister Mahindananda Aluthgamage displayed at a live political programme on Derana a copy of the P CoI report he received at the cabinet meeting earlier in the day.
Sources said that the Attorney General’s Department couldn’t decide on a course of action in respect of the Easter carnage on the basis of a section of the report. In terms of the Commission of Inquiry Act (Section 24), the AG enjoyed significant powers/authority in respect of investigations; sources said adding that the Department urgently required both the P CoI report and police investigations report. The Attorney General’s Department has raised the delay in receiving a P CoI report amidst the Catholic Church attacking the government over the same issue.
Sources said that ministerial committee appointed to study the P CoI report couldn’t decide on how to proceed with the recommendations and the matter was entirely in the hands of the AG. Sources pointed out that the delay on the part of the government to release the report had received the attention of sections of the international media, including the New York Times. Public Security Minister retired Rear Admiral Sarath Weerasekera having met Malcolm Cardinal Ranjith at the Bishop’s House on Dec 8, 2020 said that the AG would get a copy of the P CoI report once the President received it. Minister Weerasekera said that the CID had handed over the relevant files after having completed investigations into eight blasts. Referring to the Parliamentary Select Committee (PSC) report on the Easter Sunday carnage, the former Navy Chief of Staff said that all such documents would have to be brought to one place and considered before initiating legal proceedings. Acknowledging that there could be delays, lawmaker Weerasekera said that on the instructions of the Attorney General a 12-member team of lawyers was working on the case. The minister vowed to expose the mastermind behind the Easter Sunday attacks. Investigations continued while some of those wanted were overseas, the minister said.
The minister acknowledged that the Attorney General couldn’t proceed without the P CoI report. Minister Weerasekera reiterated that once the President received the P CoI report, it would be sent to the Attorney General. The minister said that there were documents two to three feet high that needed scrutiny. The minister assured comprehensive investigation. The minister said that investigations pertaining to eight blasts had been completed and the reports handed over to the AG. However, the Attorney General had found shortcomings in those investigations.
Author
By Saman Indrajith
The Presidential Commission of Inquiry on the Easter Sunday bombings had failed to identify the mastermind of , the JVP said yesterday.
Addressing the media at the party headquarters in Pelawatte, JVP Propaganda Secretary MP Vijitha Herath said that the PCoI report had levelled accusations against former President Maithripala Sirisena, former IGP and head of intelligence for their dereliction of duty, shirking of responsibilities and not taking action to prevent the attacks and negligence. There were reference to the causes of the terror attacks and actions to be taken to avoid such attacks and the influence of extremist organisations. “However, there is no mention of the mastermind of the attacks, the handlers of the attackers and those whose interests the carnage served. It is also not mentioned whether there has been any foreign or local organisation behind those attacks. As per the PCoI report the attack took place as a result of culmination of extremism.
“According to the PCoI the extremist activities were a result of the prevailing political situation then. The entire nation was waiting to see who was responsible and who masterminded those attacks. The PCoI has failed to identify the true culprits responsible for the terror attacks. The report says that the leader of the suicide cadres killed himself in the attacks and it was a puzzle. That means those who are actually responsible for the attacks are still at large. The report does not provide exact details of the sources of the attacks. The PCoI had sittings for one year and five months. It summoned various persons and got their statements but it has failed to shed any light on the terror attacks. Everybody knows that the top leaders of the government and heads of security and intelligence establishments failed in their duties. Ranil Wickremesinghe was the second in command and he too is bound by the responsibility but the PCoI report fails to identify him as one of the persons against whom legal action should be instituted. The PCoI has treated Wickremesinghe and former President Maithripala Sirisena differently. We are not telling that this report is a total failure but we cannot accept this as a complete report. The PCoI handed over its report to the President on Feb 1. After 23 days it was sent to Parliament. Now, a copy of the report is there in the parliamentary library for the perusal of MPs.”
Herath said that the PCoI did not have powers to take punitive action. “It only has powers to name those responsible and recommend action to be taken against those named.
