Published: 20th Jul, 2023
Hoolock gibbon: India’s only ‘Ape’
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Recently, as the meeting of Global Gibbon Network (GGN) held in China, the conservation status of India’s only ape was a cause for concern at a global event on gibbons.
About the Species:
- Gibbons, the smallest and fastest of all apes, live in tropical and subtropical forests in the south-eastern part of Asia.
- The hoolock gibbon, unique to India’s northeast, is one of 20 species of gibbons on Earth.
- The estimated population of hoolock gibbons is 12,000.
- The current conservation status of gibbon species is alarming – all 20 species are at a high risk of extinction.
- Western Hillock Gibbon:
- Its range extends into seven states covering Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura.
- Protection Status: The western hoolock gibbon is 'Endangered' according to the IUCN Red List found in India.
- Eastern hoolock gibbon:
- It inhabits specific pockets of Arunachal Pradesh and Assam in India, and in southern China and north-east Myanmar outside India.
- It is listed as Vulnerable under the IUCN Redlist.
- In India, both the species are listed on Schedule 1 of the Indian (Wildlife) Protection Act 1972.
‘Cicada species’ proved an Indian identity
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According to the research led by Travancore Nature History Society, the discovery that involved correcting the mistaken identity of Purana cheeveeda with Purana tigrina (indigenous to India) has been corrected.
- Approximately 250 kinds of cicadas are known to occur in India. They are distributed across many genera and Rustia is only one of them.
Historical background:
- Purana tigrina was first described in 1850 from the Malabar Coast of south-western India by the English entomologist Francis Walker.
- It occurs in primary lowland rainforest but is more often found in secondary forest, felled areas, parks and gardens.
Do you know?
- Cicada species make their sound by expanding and contracting a membrane called a tymbal.
- They use their sound to attract females.
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About the Species:
- Purana tigrina is a species of cicada found in Southeast Asia.
- It was described from Malabar, South India.
- It is a common species in the Malayan Peninsula and on Bunguran Island in the South China Sea.
- The body length of a male is 5–29 mm and that of the female somewhat less at 18–23 mm.
- They have a greenish-ochraceous head and thorax, and brownish-ochraceous abdomen.
- The head and thorax are marked in black.
Gambusia
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Recently, Andhra Pradesh has releases 10 million Gambusia fish (mosquitofish) in waterbodies to control malaria, dengue.
About the Species:
- Gambusia affinis (Gaffinis) is native to the waters of the south-eastern United States and a single full grown fish eats about 100 to 300 mosquito larvae per day.
- Mosquitofish has been part of various malaria control strategies in India since 1928, including the Urban Malaria Scheme.
- The fish are generally understood to be a good biological control method against mosquito breeding but is not a sole solution to control Malaria.
- Multiple countries, including India have listed ‘Gambusia’ as invasive species.
- However, the fish continues to be a prominent part of the country’s malaria control programmes and the fish continue to be released into freshwater bodies across the country, like Andhra Pradesh, Chandigarh and Uttar Pradesh