Archive for August, 2013

Recently our paper on the cryptic species among the red lined torpedo barbs (RLTB; Puntius denisonii and P. chalakkudiensis) have been published in plos one. The study identified 8 evolutionarily distinct lineages among the 12 different studied populations from its entire range.

At the molecular level, the study used mitochondrial DNA markers and employed species delimitation methods like the Bayesian Species delimitation method, the GMYC method etc, which identified 8 distinct lineages. At the morphological level CVA and MANOVA could distinguish all the populations as distinct.

However, taking into account both the results (from morphology and molecular methods), the minimum number of distinct lineages agreed by both methods is eight. Thus we conclude that the species has 8 distinct lineages that need separate conservation attention.

This study comes along with another study, which found that massive amounts of these barbs were being exported from India, after being collected from the wild. That means there are no regulations in India for the exploitation of this fish.

This fish is “endemic” to the Western Ghats of India. Now the finding that there are 8 distinct lineages that need separate conservation attention, calls for immediate action from the authorities, hobbyists and scientists, to generate an action plan and conserve this beautiful little fish.

Readers are invited to read this paper which is open access and downloadable at Plos One.

Reference:

John L, Philip S, Dahanukar N, Anvar Ali PH, Tharian J, Raghavan R., and Antunes A. (2013) Morphological and Genetic Evidence for Multiple Evolutionary Distinct Lineages in the Endangered and Commercially Exploited Red Lined Torpedo Barbs Endemic to the Western Ghats of India. PLoS ONE 8(7): e69741. doi:10.1371/journal.pone.0069741

Recently our paper on the The phylogenetic position of Lepidopygopsis typus (Teleostei: Cyprinidae), a monotypic freshwater fish endemic to the Western Ghats of India has been published. This is an important work and a significant contribution to the Ichthyology of the Indian Peninsula, since it clears a longstanding misconception.

First of all, let me say that the species Lepidopygopsis typus a monotypic freshwater fish endemic to the Periyar Tiger Reserve (PTR) forests, is a relative of the Mahseers, and allied large barbs distributed in India, Pakistan, Afghanistan, Iran, Nepal and several North African regions.

It was until now confused to be a species within the “schizothoracinae”, which comprise the hill trouts or the mountain barbells of the Himalayas. The “disjunct distribution” has baffled ichthyologists and biogeographers at the same time.

Lepi

Now we show that it is just a case of a “false disjunct” which arose due to improper systematic position of the species.

Here, using phylogenetic hypothesis testing, and using both mitochondrial DNA and nuclear DNA phylogenies we solve the puzzle. All are welcome to read the paper and comment on it. If the readers need a full text of the paper please feel free to mail me or one of my co-authors who will happily share it with you for non-profit/research purposes.

 

Reference:

NEELESH DAHANUKAR, SIBY PHILIP, K. KRISHNAKUMAR, ANVAR ALI & RAJEEV RAGHAVAN, 2013. The phylogenetic position of Lepidopygopsis typus (Teleostei: Cyprinidae), a monotypic freshwater fish endemic to the Western Ghats of India, Zootaxa 3700 (1): 113–139.