Note4Students
From UPSC perspective, the following things are important :
Prelims level: Litoria mira
Mains level: NA
A species of frog lives in the rainforests of New Guinea that appears to be made from chocolate — just like the magical sweets popular in the wizarding world of J K Rowling’s Harry Potter.
Litoria mira
- The cocoa-colored frogs have turned out to be a new species — and an addition to our knowledge of the animal kingdom.
- It has a well-known relative — the common green tree frog of Australia called Litoria cerulean.
- Litoria Mira can be distinguished from all other Litoria by its unique combination of moderately large size, webbing on hand, relatively short and robust limbs, and a small violet patch of skin on the edge of its eyes.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Blackbuck
Mains level: Not Much
Odisha’s blackbuck population has doubled in the last six years, according to figures from the latest population census.
Blackbucks in Odisha
- Blackbucks are found only in the Ganjam district in the southern part of the state, which is where the census was carried out.
- It is known in Odisha and Ganjam as Krushnasara Mruga.
- The people of Ganjam believe the sighting of a blackbuck in a paddy field is a harbinger of luck for them.
- It used to be sighted in the Balukhand-Konark Wildlife Sanctuary in Puri district till 2012-13, but now has vanished from the area.
- The blackbuck is a Schedule-1 animal according to the Wild Life (Protection) Act, 1972 (amended in 1992) and is considered as ‘Vulnerable’ according to the Red Data Book.
Reasons for their rise
- Improvement of habitats, the protection given by the local people and forest staff were some of the reasons for the increase of the population.
- The people of Ganjam had been enthusiastically protecting the animal like the Bishnois of western Rajasthan and the Vala Rajputs of Saurashtra.
Answer this PYQ:
Q.With reference to ‘Eco-Sensitive Zones’, which of the following statements is/are correct?
- Eco-Sensitive Zones are the areas that are declared under the Wildlife (Protection) Act, 1972.
- The purpose of the declaration of Eco-Sensitive Zones is to prohibit all kinds of human activities, in those zones except agriculture.
Select the correct answer using the code given below:
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Back2Basics: Wildlife (Protection) Act, 1972
- WPA provides for the protection of the country’s wild animals, birds, and plant species, in order to ensure environmental and ecological security.
- It provides for the protection of a listed species of animals, birds, and plants, and also for the establishment of a network of ecologically important protected areas in the country.
- It provides for various types of protected areas such as Wildlife Sanctuaries, National Parks, etc.
- There are six schedules provided in the WPA for the protection of wildlife species which can be concisely summarized as under:
| Schedule I: |
These species need rigorous protection and therefore, the harshest penalties for violation of the law are for species under this Schedule. |
| Schedule II: |
Animals under this list are accorded high protection. They cannot be hunted except under threat to human life. |
| Schedule III & IV: |
This list is for species that are not endangered. This includes protected species but the penalty for any violation is less compared to the first two schedules. |
| Schedule V: |
This schedule contains animals which can be hunted. |
| Schedule VI: |
This list contains plants that are forbidden from cultivation. |
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Red-eared slider
Mains level: Paper 3- Native Indian turtles face threat from red-eared slider
About red-eared slider
- The red-eared slider (Trachemys scripta elegans) derives its name from red stripes around the part where its ears would be and from its ability to slide quickly off any surface into the water.
- Native to the U.S. and northern Mexico, this turtle is an extremely popular pet due to its small size, easy maintenance, and relatively low cost.
Reports about threat
- Between August 2018 and June 2019, a team of herpetologists from NGO Help Earth published the finding in ‘Reptiles & Amphibians’, journal of the U.S.-based International Reptile Conservation Foundation in August 2020.
- But the alarm was raised experts from Mizoram University’s Department of Zoology published another report in the same journal in April this year.
How is it a threat?
- They grow fast and virtually leaves nothing for the native species to eat.
- People who keep it as pets become sensitive about turtle conservation but endanger the local ecosystem, probably unknowingly, by releasing them in natural water bodies after they outgrow an aquarium, tank or pool at home.
- Much like the Burmese python that went to the U.S. as a pet to damage the South Florida Everglades ecosystem, the red-eared slider has already affected States such as Karnataka and Gujarat, where it has been found in 33 natural water bodies.
- Preventing this invasive species from overtaking the Brahmaputra and other river ecosystems in the Northeast is crucial because the Northeast is home to more than 72% of the turtle and tortoise species in the country, all of them very rare.
Way forward
- Although the red-eared slider is traded legally, the time has come for the government to come up with regulations against keeping invasive as pets.
- There is a need to create awareness among pet traders for maintaining a database of red-eared slider buyers.
- They can be contacted to hand over the turtles to the repository insulated from any wetland or natural water body.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: IUCN status of white-bellied heron
Mains level: Paper 3- White-bellied heron spotted
About the bird
- The white-bellied heron is categorised as ‘critically endangered’ in International Union for Conservation of Nature (IUCN) Red Data Book.
- It is listed in Schedule IV in the Wildlife Protection Act, 1972.
- It is one of the rarest birds in the world and is found only in Bhutan, Myanmar and the Namdapha Tiger Reserve in Arunachal Pradesh.
- It had also been recorded in the adjacent Kamlang Tiger Reserve in Lohit district in camera trap images.
Significance of recent sighting
- The recent sighting at a height of 1,200 metres above sea level is a first at such a higher elevation in India.
- The presence of nesting sites within this area is a positive sign for the future habitat as the breeding season of the white-bellied heron starts in February and lasts till June.
- It is great news that the critically endangered bird is establishing new habitat beyond its traditional range.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Species of bats
Mains level: Paper 3- Disk-footed bat recorded for first time in India
About the species
- A team of scientists from the Zoological Survey of India (ZSI) and a few European natural history museums stumbled upon very specialised small bat with “disk-like pads in the thumb and bright orange colouration”.
- The flattened skull and sticky pads enabled the bats to roost inside cramped spaces, clinging to smooth surfaces such as bamboo internodes.
- The disk-footed bat was also found to be genetically very different from all other known bats bearing disk-like pads.
Significance
- Meghalaya has yielded India’s first bamboo-dwelling bat with sticky disks, taking the species count of the flying mammal in the country to 130.
- The disk-footed bat has raised Meghalaya’s bat count to 66, the most for any State in India.
- It has also helped add a genus and species to the bat fauna of India.
- There are a couple of other bamboo-dwelling bats in India.
- But the extent of adaptation for bamboo habitat in this species is not seen in the others.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Great Indian Bustard
Mains level: Wildlife conservation efforts
The recent shooting of two Great Indian Bustards (GIBs) in Pakistan’s Cholistan desert has left wildlife activists in Rajasthan shocked and outraged.
Great Indian Bustards
- The GIB is one of the heaviest flying birds and can weigh up to 15 kg which grows up to one metre in height.
- In July 2011, the bird was categorised as “critically endangered” by the International Union for Conservation of Nature (IUCN).
- It is considered the flagship grassland species, representing the health of the grassland ecology.
- For a long, conservationists have been demanding to secure this population, warning that the bird might get extinct in the coming decades.
- It would become the first mega species to disappear from India after Cheetah in recent times.
- Till the 1980s, about 1,500-2,000 Great Indian Bustards were spread throughout the western half of India, spanning eleven states.
- However, with rampant hunting and declining grasslands, their population dwindled.
Why in news?
- The GIB, which is the state bird of Rajasthan, is considered India’s most critically endangered bird.
- It is one of the most critically threatened species in India, with less than 150 birds left in the wild.
Try this PYQ:
Q.Which one of the following groups of animals belongs to the category of endangered species?
(a) Great Indian Bustard, Musk Deer, Red Panda, Asiatic Wild Ass
(b) Kashmir Stag, Cheetah, Blue Bull, Great Indian Bustard.
(c) Snow Leopard, Swamp Deer, Rhesus Monkey, Saras (Crane)
(d) Lion Tailed Macaque, Blue Bull, Hanuman Langur, Cheetah
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Indian Rhino Vision 2020
Mains level: Not Much
The ambitious Indian Rhino Vision 2020 (IRV 2020) came to a close with the release of two rhinos — an adult male and a female — in Assam’s Manas National Park transported from Pobitora Wildlife Sanctuary about 185 km east.
Try this PYQ:
Q.Recently there was a proposal to translocate some of the lions from their natural habitat in Gujarat to which one of the following sites?
(a) Corbett National Park
(b) Kuno Palpur Wildlife Sanctuary
(c) Mudumalai Wildlife Sanctuary
(d) Sariska National Park
What is IRV 2020?
- In 2005, conservationists, alongside the Bodoland Territorial Council and the Government of Assam, came together to develop a long-term strategy to manage the species.
- Their vision was ambitious; to build a 3,000-strong wild population of Greater one-horned rhinos by 2020, spread across seven sites in the state of Assam.
- Thus the “Indian Rhino Vision 2020” (IRV2020) was born.
Success of the IRV
- Designed in 2005, the IRV2020 is believed to have achieved its target of attaining a population of 3,000 rhinos in Assam.
- But the plan to spread the Rhinoceros unicornis across four protected areas beyond Kaziranga National Park, Orang National Park and Pobitora could not materialise.
- Assam had at least five rhino-bearing areas till the 1980s.
- Manas, in focus for the near-extinction of the pygmy hog, lost the World Heritage Site tag it received in 1985 along with Kaziranga from the UNESCO.
- The translocated rhinos helped Manas National Park get back its World Heritage Site status in 2011.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Nacaduba sinhala ramaswamii Sadasivan
Mains level: NA
The discovery of the species Nacaduba sinhala ramaswamii Sadasivan in the Agasthyamalais in the Western Ghats a decade ago has now found a place in the Journal of Threatened Taxa.
William Shakespeare’s words hold true! Really “Whats in a name!”
Nacaduba sinhala ramaswamii Sadasivan
- The new taxon of Lycaenid butterflies belonging to the Nacaduba genus had been first sighted by a team of Bombay Natural History Society.
- Line Blues are small butterflies belonging to the subfamily Lycaenidae and their distribution ranges from India and Sri Lanka to the whole of southeastern Asia, Australia and Samoa.
- It is the first time that a butterfly species was discovered by an all-Indian research team from the Western Ghats.
Try this PYQ from CSP 2020:
Q.With reference to India’s Biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are
(a) Birds
(b) Primates
(c) Reptiles
(d) Amphibians
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Red algae
Mains level: Seaweeds and their significance
Two new species of seaweed have been discovered by a group of marine biologists from the Central University of Punjab, Bathinda.
What are the species?
- Named Hypnea indica (after India) and Hypnea bullata (because of the blisterlike marks on its body – bullate), the seaweeds are part of the genus Hypnea or red seaweeds.
- They grow in the intertidal regions of the coast, namely the area that is submerged during the high tide and exposed during low tides.
Do you know?
Red Algae have great ecological importance. They form a vital part of the food chain and are also involved in producing about 40 to 60 per cent of the total global oxygen for both terrestrial habitat and other aquatic habitats.
Details of the genus
- The genus Hypnea consists of calcareous, erect, branched red seaweeds.
- While Hypnea indica was discovered Kanyakumari in Tamil Nadu, and Somnath Pathan and Sivrajpur in Gujarat, Hypnea bullata was discovered from Kanyakumari and Diu island of Daman and Diu.
- There are 61 species of which 10 were reported in India.
Significance for the food industry
- Species of Hypnea contain the biomolecule carrageenan, which is widely used in the food industry.
- As the two species have been found on the west and south-east coasts of India, it suggests good prospects for their cultivation which can be put to good use economically.
- The extensive calcareous deposit on the body that has been observed also provides room for thought.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Himalayan Serow
Mains level: Not Much
A Himalayan mammal, somewhere between a goat and an antelope, has been confirmed as the newest creature to be spotted in Assam.
Himalayan Serow
- Himalayan Serow resembles a cross between a goat, a donkey, a cow, and a pig.
- They are herbivores and are typically found at altitudes between 2,000 metres and 4,000 metres (6,500 to 13,000 feet).
- They are known to be found in the eastern, central, and western Himalayas, but not in the Trans Himalayan region.
- They are medium-sized mammal with a large head, thick neck, short limbs, long, mule-like ears, and a coat of dark hair.
- There are several species of Serow s, and all of them are found in Asia.
Try this PYQ:
Q. With reference to India’s biodiversity, Ceylon frogmouth, Coppersmith Barbet, Gray-chinned mini yet and White-throated redstart are–
(a) Birds
(b) Primates
(c) Reptiles
(d) Amphibians
Its’ conservation status
- According to the IUCN, Himalayan Serow s have experienced significant declines in population size, range size and habitat in the last decade, and this is expected to continue due to intensive human impact.
- Previously assessed as ‘near threatened’, the Himalayan Serow is now been categorised as ‘vulnerable’ in the IUCN Red List of Threatened Species.
- It is listed under Schedule I of The Wildlife Protection Act, 1972, which provides absolute protection.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Giant Leatherback Turtle
Mains level: Not Much
Proposals for tourism and port development in the Andaman and Nicobar (A&N) Islands has left conservationists worried over the fate of some of the most important nesting populations of the Giant Leatherback turtle.
What is the news?
- There is concern that at least three key nesting beaches — two on Little Andaman Island and one on Great Nicobar Island — are under threat due to mega “development” plans announced in recent months.
- These include NITI Aayog’s ambitious tourism vision for Little Andaman and the proposal for a mega-shipment port at Galathea Bay on Great Nicobar Island.
Giant Leatherback Turtle
IUCN status: Vulnerable
- The largest of the seven species of sea turtles on the planet and also the most long-ranging, Leatherbacks are found in all oceans except the Arctic and the Antarctic.
- Within the Indian Ocean, they nest only in Indonesia, Sri Lanka and the A&N Islands.
- They are also listed in Schedule I of India’s Wildlife Protection Act, 1972, according it the highest legal protection.
- The population in A&N Islands is among the most important colonies of the Leatherback globally.
About Galathea Bay
- The Galathea Bay is adjacent to Galathea National Park in Great Nicobar Island.
- It was earlier proposed as a wildlife sanctuary in 1997 for the protection of turtles and was also the site of a long-term monitoring programme.
- The monitoring was stopped after the tsunami devastation of 2004, but it provided the first systematic evidence of numbers and importance of these beaches.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Mandarin Duck, Dibru Saikhowa NP
Mains level: Not Much
A rare Mandarin duck was observed floating in the Maguri-Motapung beel (or wetland) in Assam’s Tinsukia district for over a week is spectacular.
Mandarin duck
IUCN status: Least Concerned
- Considered the most beautiful duck in the world, the Mandarin duck, or the (Aix galericulata) was first identified by Swedish botanist, physician and zoologist Carl Linnaeus in 1758.
- The eBird website, a platform that documents birds world over, describes it as a “small-exotic looking bird” native to East Asia.
- It’s very beautiful, with majestic colours and can be spotted from a distance.
Its habitat and breeding
- The migratory duck breeds in Russia, Korea, Japan and northeastern parts of China. It now has established populations in Western Europe and America too.
- In 2018, when a Mandarin duck was spotted in a pond in New York City’s Central Park, it created a flutter among local residents.
- It was recorded in 1902 in Dibru River in the Rongagora area in Tinsukia.
About Maguri beel
- The Maguri Motapung wetland is an Important Bird Area as declared by the Bombay Natural History Society.
- It is located close to the Dibru Saikhowa National Park in Upper Assam.
- The entire ecosystem is very important as it is home to at least 304 bird species, including a number of endemic ones like Black-breasted parrotbill and Marsh babbler.
- In May 2020, the beel was adversely affected by a blowout and fire at an Oil India Limited-owned gas well.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Portulaca Laljii
Mains level: NA
Botanists have discovered a new species of wild Sun Rose from the Eastern Ghats in India.
Try this PYQ from CSP 2018:
Q.Why is a plant called Prosopis juliflora often mentioned in the news?
(a) Its extract is widely used in cosmetics.
(b) It tends to reduce the biodiversity in the area in which it grows
(c) Its extract is used in the pesticides.
(d) None of the above
Portulaca Laljii
- The new species named Portulaca laljii was discovered from the Prakasam district of Andhra Pradesh.
- It has unique features such as a tuberous root, no hair in its leaf axils, a reddish-pink flower, prolate-shaped fruits, and copper brown seeds without luster.
- Portulaca Laljii has been named to honor the contribution of Lal Ji Singh, an eminent botanist of the Botanical Survey of India.
- The species has been placed under the ‘Data Deficient’ category of the IUCN List of Threatened Species because very little information is available about the population of the species.
Morphological features
- These morphological features distinguish the species from other species of the genus Portulaca.
- The flowers, which are reddish-pink in color, are very minute, at about 0.5mm.
- The plant was found growing in rocky crevices at an altitude of about 1,800 meters above mean sea level, very close to the ground, at about less than 10 cm.
- The plants belonging genus Portulaca are classified in the category Sun Rose because they flower in bright sunshine.
- The genus was described by Linnaeus in 1753 as a type genus of the flowering plant family Portulacaceae.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Himalayan trillium
Mains level: Not Much
The Himalayan trillium (Trillium govanianum), a common herb of the Himalayas was declared ‘endangered’ by the International Union for Conservation of Nature (IUCN) last week.
Try this MCQ:
Q.Recently, there was a growing awareness in our country about the importance of Himalayan nettle (Girardinia diversifolia) because it is found to be a sustainable source of-
(a) Anti-malarial drug
(b) Bio-diesel
(c) Pulp for paper industry
(d) Textile fibre
Himalayan trillium
- In recent years, the plant has become one of the most traded commercial plants of the Himalayan region, due to its high medicinal quality.
- It is found in temperate and sub-alpine zones of the Himalayas, at an altitude from 2,400-4,000 metres above sea level.
- Their existence has also been traced across India, Bhutan, Nepal, China, Afghanistan and Pakistan.
- In India, it is found in four states only- Himachal Pradesh, Jammu and Kashmir, Sikkim, and Uttarakhand.
- Often called Nagchatri, in local areas this herb grows to a height of 15-20 cm.
Various applications
- It has been used in traditional medicine to cure diseases like dysentery, wounds, skin boils, inflammation, sepsis, as well as menstrual and sexual disorders.
- Recent experiments have shown that the rhizome of the herb is a source of steroidal saponins and can be used as an anti-cancer and anti-ageing agent.
- This increased its market value and has now become an easy target for poachers.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Indian Bison (Gaur)
Mains level: Man-animal conflict
A gaur (Indian bison) strayed into a residential area in Pune city and allegedly died while being captured. This has depicted another ugly face of the man-animal conflicts.
Try this PYQ:
Q.Which one of the following groups of animals belongs to the category of endangered species?
(a) Great Indian Bustard, Musk Deer, Red Panda, Asiatic Wild Ass
(b) Kashmir Stag, Cheetah, Blue Bull, Great Indian Bustard.
(c) Snow Leopard, Swamp Deer, Rhesus Monkey, Saras (Crane)
(d) Lion Tailed Macaque, Blue Bull, Hanuman Langur, Cheetah
Gaur/ Indian Bison
- The Indian bison are also known as Gaur, is native to South and Southeast Asia and has been listed as Vulnerable on the IUCN Red List since 1986.
- The global population has been estimated at maximum 21,000 mature individuals by 2016.
- It declined by more than 70% during the last three generations, and is extinct in Sri Lanka and probably also in Bangladesh.
- Populations in well-protected areas are stable and increasing.
- The Western Ghats and their outflanking hills in southern India constitute one of the most extensive extant strongholds of gaur, in particular in the Wayanad – Nagarhole – Mudumalai – Bandipur complex.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Himalayan Serow
Mains level: NA
A Himalayan Serow has been sighted for the first time in the Himalayan cold desert region.
Try this MCQ:
Q.In which one of the following State, the Rupi Bhaba Wildlife Sanctuary is located?
(a) Himachal Pradesh
(b) Manipur
(c) Meghalaya
(d) Uttarakhand
Himalayan Serow
- Himalayan Serow resembles a cross between a goat, a donkey, a cow, and a pig.
- They are herbivores and are typically found at altitudes between 2,000 metres and 4,000 metres (6,500 to 13,000 feet).
- They are known to be found in eastern, central, and western Himalayas, but not in the Trans Himalayan region.
- They are a medium-sized mammal with a large head, thick neck, short limbs, long, mule-like ears, and a coat of dark hair.
- There are several species of Serow s, and all of them are found in Asia.
Its’ conservation status
- According to the IUCN, Himalayan Serow s have experienced significant declines in population size, range size and habitat in the last decade, and this is expected to continue due to intensive human impact.
- Previously assessed as ‘near threatened’, the Himalayan Serow is now been categorised as ‘vulnerable’ in the IUCN Red List of Threatened Species.
- It is listed under Schedule I of The Wildlife Protection Act, 1972, which provides absolute protection.
What is so unusual this time?
- The animal was spotted by locals and wildlife officials at a riverside rocky wall near Hurling village in Spiti, Himachal Pradesh.
- This is the first recorded human sighting of the Serow in Himachal Pradesh.
- Serow s are generally not found at this altitude, and never before has a Serow been seen in the Himalayan cold desert.
- Wildlife officials believe this particular animal may have strayed into the Spiti valley from the Rupi Bhaba Wildlife Sanctuary in adjoining Kinnaur.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Myristica Swamp Treefrog
Mains level: Western Ghats and its biodiversity richness
Myristica swamp treefrog, a rare arboreal (living on trees) species endemic to the Western Ghats has been recorded for the first time in Kerala’s Thrissur district.
Again, a stand-alone peculiar species is in the news. Make a special note here. Usually, note the species and its habitat location (IUCN status if available), in the purview of a generic prelims question.
Myristica Swamp Treefrog
- It bears the scientific name Mercurana myristicapalustris.
- The frog was first spotted in 2013 in the Myristica swamps of Arippa, near the Kulathupuzha Reserve Forest, in the western foothills of Agasthyamalai, in Kollam district.
- Unlike the Myristica swamp treefrog found in the foothills of the Agasthyamalai, these frogs were found to be active throughout June and early July.
Unique traits
- These frogs are rare and elusive for the reason that they are arboreal and active only for a few weeks during their breeding season.
- During this season, there is a large aggregation of males that descend from the high canopy of the trees.
- The breeding season, unlike for other frogs, starts in the pre-monsoon season (May) and ends before the monsoon becomes fully active in June.
- Before the end of the breeding season, the female frogs along with their male counterparts descend on the forest floor. The female digs the mud and lays eggs in shallow burrows in mud.
- After breeding and egg-laying, they retreat back to the high canopies of the tree and remain elusive till next breeding season.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Zebrafish
Mains level: Not Much
Indian scientists have used the Zebrafish model and identified its genes that can promote heart regeneration.
Try this PYQ:
Q.With reference to India’s Biodiversity, Ceylon frogmouth, Coppersmith Barbet, Gray-chinned minivet and White-throated redstart are-
(a) Birds
(b) Primates
(c) Reptiles
(d) Amphibians
Zebrafish
- Zebrafish is a small (2-3 cm long) freshwater fish found in the tropical and subtropical regions.
- The fish is native to South Asia’s Indo-Gangetic plains, where they are mostly found in the paddy fields and even in stagnant water and streams.
- The fish become adults at three months and survive 2-3 years in a laboratory condition.
- Its unique characteristics lie in its transparency during its embryonic stages, allowing observing all organs, including beating heart and blood circulation.
Ability to heal their heart
- The ability of Zebrafish to heal their heart after injury makes them an attractive model to investigate mechanisms governing the regenerative process.
- Researchers worldwide are actively working to understand the mechanism behind the heart regeneration in Zebrafish for the last two decades.
- Years of efforts have helped them identify the cellular communication network factor 2a (ccn2a), a gene that can promote heart regeneration by enhancing cardiomyocyte proliferation.
- They have also observed that this gene resolves the transient collagenous fibrotic scar resulting in faster regeneration.
Significance for humans
- Cardiovascular diseases are the number 1 cause of deaths globally, taking an estimated 17.9 million lives each year, according to the World Health Organisation.
- Humans cannot regenerate their hearts upon myocardial damage and a person who suffered a heart attack cannot functionally heal the damaged heart muscle, resulting in reduced pumping efficiency.
- While on the other hand, this unique fish has the full potential to regenerate its heart and restore its function after injury.
- Till now, there is no treatment available to restore the damaged heart function in humans. Hence scientists have sought to decode the heart regeneration processes using this model animal.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Bioluminescence
Mains level: Eastern Himalayas and its biodiversity
A mushroom documentation project in the forests of Northeast India has discovered a bioluminescent — or light-emitting — variety of mushroom.
Try this PYQ:
Q.Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of:
(a) Algae and bacteria
(b) Algae and fungi
(c) Bacteria and fungi
(d) Fungi and mosses
Roridomyces phyllostachydis
- The new species was first sighted near a stream in Meghalaya’s Mawlynnong in East Khasi Hills district and later at Krang Shuri in West Jaintia Hills district.
- It is now one among the 97 known species of bioluminescent fungi in the world.
Bioluminescence in fungi
- Bioluminescence is the property of a living organism to produce and emit light.
- Bioluminescent organisms are usually found in ocean environments, but they are also found in terrestrial environments.
- The colour of the light emitted by the organism depends on its chemical properties.
- In the case of fungi, the luminescence comes from the enzyme, luciferase.
- The green light emits when luciferans is catalysed by the enzyme luciferase, in the presence of oxygen.
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Note4Students
From UPSC perspective, the following things are important :
Prelims level: Genus Rohanixalus
Mains level: Eastern Himalayas and its biodiversity
Indian researchers have discovered a genus of tree frog found in the Andaman Islands and the northeast.
A stand-alone species being mentioned in the news for the first time find their way into the prelims. Make special note here. Usually, note the species and its habitat location (IUCN status if available), in the purview of a generic prelims question.
Genus Rohanixalus
- Named after Sri Lankan taxonomist Rohan Pethiyagoda, the frogs of the new genus Rohanixalus are characterised by a rather small and slender body (size about 2 to 3 cm long).
- It has a pair of contrastingly coloured lateral lines on either side of the body, minute brown speckles scattered throughout the upper body surfaces, and light green coloured eggs laid in arboreal bubble-nests.
- Based on DNA studies, the new genus is also revealed to be a distinct evolutionary lineage from all previously known tree frog genera.
- It is the 20th recognised genus of the family Rhacophoridae that comprises 422 known Old World tree frog species found in Asia and Africa.
Sub-species of this frog
- There are eight frog species in this genus Rohanixalus.
- They are known to inhabit forested as well as human-dominated landscapes right from the northeast to Myanmar, Thailand, Malaysia, Indonesia, Vietnam, Laos, and Cambodia, up to southern China.
Unique features of this genus
- The genus has several unique behavioural traits including maternal egg attendance where the female (mother) attends the egg clutches until hatching and assists in the release of the tadpoles into the water.
- During the first three days after egg-laying, the female sits over the eggs and produces a gelatinous secretion with which she glazes the egg mass through the clock-wise movement of her legs.
- This behaviour provides necessary moisture to the eggs laid on exposed leaf surfaces and protects them from insect predation.
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