andamane

Genetic history of present-day Indians

A study published in the Proceedings of the National Academy of Sciences (PNAS) explores the genetic history of present-day Indians and the peopling of the Indian subcontinent. Researchers have previously suggested that mainland India’s current population largely descended from two ancient groups, namely ancestral north and south Indians. Partha Majumder and colleagues analyzed genome-wide variations from 367 unrelated Indians belonging to 20 ethnic groups, including two tribal groups from the outlying Andaman and Nicobar Islands, as well as data from the Human Genome Diversity Panel, a repository of genomic data representing hundreds of people worldwide.

The authors discerned four major ancestral populations in mainland India. In addition to ancestral north and south Indians, the authors discovered Austro-Asiatic and Tibeto-Burman ancestries. Unlike mainland Indians, the hunter-gatherers of the Andaman archipelago likely share ancestry with present-day Pacific Islanders, representing a fifth ancestry in India. Read more.

We do not need to have doubts about our future. It will be like the tide. It will have its ups and downs, highs and lows. But in the end, just like a wave rushing to meet the shore, I will come back to you.

- Abhiraj R

A shot from the recent travelogue I published on YouTube. Link in bio.

#vsco #indiastories #india_gram #IndiaTravels #india #andaman #beach #sea #sand #beautiful #vintage #love #look #follow (at Neil Island, Andaman and Nicobar)

Subducted seamounts

Subduction zones are some of the most powerful faults in Earth’s crust. They store up huge amounts of energy and produce Earth’s most powerful earthquakes. The largest recorded quake in human history happened in 1960 on the subduction zone to the west of Chile, where the Nazca plate sinks beneath South America. That subduction zone regularly produces large earthquakes, including a magnitude 8.1 earthquake in 2014.

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CURRENT WORK IN HERPETOLOGY:

Blythophryne beryet • A New Genus and Species of Arboreal Toad (Anura, Bufonidae) with Phytotelmonous Larvae, from the Andaman Islands, India  [2016]

Abstract:

A new bufonid amphibian, belonging to a new monotypic genus, is described from the Andaman Islands, in the Bay of Bengal, Republic of India, based on unique external morphological and skeletal characters which are compared with those of known Oriental and other relevant bufonid genera.

Blythophryne gen. n. is distinguished from other bufonid genera by its small adult size (mean SVL 24.02 mm), the presence of six presacral vertebrae, an absence of coccygeal expansions, presence of an elongated pair of parotoid glands, expanded discs at digit tips and phytotelmonous tadpoles that lack oral denticles.

The taxonomic and phylogenetic position of the new taxon (that we named as Blythophryne beryet gen. et sp. n.) was ascertained by comparing its 12S and 16S partial genes with those of Oriental and other relevant bufonid lineages. Resulting molecular phylogeny supports the erection of a novel monotypic genus for this lineage from the Andaman Islands of India.

Read moreNovaTaxa - Species New to Science

Source:

S. R. Chandramouli, Karthikeyan Vasudevan, S Harikrishnan, Sushil Kumar Dutta, S Jegath Janani, Richa Sharma, Indraneil Das and Ramesh Aggarwal. 2016.  ZooKeys. 555: 57-90. doi: 10.3897/zookeys.555.6522

When you look back at the places and things you have witnessed, then reminisce on the things you have experienced; you realise just how lucky and blessed you really are. We both feel so completely and wholly grateful for all the development, learning, attitude and perspective that we have harnessed through what we have done and where we have been in our lives. Thank you mother nature, you aren’t thanked enough! (and yes, those are amazing waves in the background!)

“Not just sitting on the edge of a phenomenal cliff, but also walking through fractal waves of my early years, resetting critical membranes, reconfiguring latent stories right down to the capillaries patterned like trees, increasing my viscosity with every ocean grind, crashing old paradigms on the shore of the present moment. A rise of energy springs forward swelling my breasts (heart) with more possibility and potential….expanded, floating, spacious, fertile with the past, present, future spiraling up my spine as one. (insert moaning sounds here #throatchakra” – abridged version of first thoughts in travel journal, thailand, Andaman Sea

eartharchives.org
New tiny arboreal toad species from india is just small enough for its own genus
Found on a herb bush, a toad of only 24 mm average length, was quick to make its discoverers consider its status as a new species. After identifying its unique morphological and skeletal characters, and conducting a molecular phylogenetic analysis, not only did Drs. Aggarwal, Vasudevan and their team, introduce a new species, but also added a new genus. The new 'Andaman bush toad' is described in the open-access journal ZooKeys.