Evaluating the role of dietary plant extracts to allow adaptation to thermal stress in a cold stream ornamental fish, Botia rostrata (Günther, 1868).

Increases in ambient temperature affect the biochemical status of fish, and dietary supplementation with bioactive phytoconstituents may promote resilience against environmental stress. This study evaluated the impact of three plant extracts on the biochemical status of a cold stream fish Botia rostrata (Günther, 1868) under high temperatures. After 1 month dietary supplementation separately with Mucuna pruriens methanol extract (0.

Paracanthocobitis hijumensis, a new species of zipper loach from the Arunachal Himalaya, northeastern India (Cypriniformes: Nemacheilidae).

Paracanthocobitis hijumensis, new species, is described from the Hijum River, a tributary of the upper Brahmaputra River in Arunachal Pradesh, India. Paracanthocobitis hijumensis is distinguished from all five species of the P. zonalternans species complex, viz.

Redescription of Sartoriana trilobata (Alcock, 1909) (Crustacea: Decapoda: Brachyura: Gecarcinucidae) from Assam, Northeast India, with notes on the morphology of male gonopods.

Sartoriana trilobata is a species of freshwater crab which occurs exclusively in some areas of Northeast India. Being a riverine crab, it is occasionally found in beels or other riverine wetland habitats formed by monsoon floods in the Brahmaputra basin.The earlier descriptions of this species were mostly incomplete which lacked information on the morphology of the male gonopods.

Mystus prabini, a new species of catfish (Siluriformes: Bagridae) from Arunachal Pradesh, north-eastern, India.

Mystus prabini, new species, is described from the Sinkin and the Dibang River in the Lower Dibang Valley District of Arunachal Pradesh, India. The new species differs from all South-Asian congeners except M. bleekeri, M.

Exostoma kottelati, a new species of catfish (Teleostei: Sisoridae) from Arunachal Pradesh, India.

Exostoma kottelati, new species, is described from the Ranga River, Brahmaputra basin, in Arunachal Pradesh state, northeastern India. It differs from congeners in the Brahmaputra River basin in having a longer adipose-fin base (33.4-36.

, a new species of loach from Arunachal Pradesh, north-eastern India (Teleostei: Nemacheilidae).

Physoschistura harkishorei, a new species of nemacheilid loach, is described from the Dibang and Lohit Rivers of Arunachal Pradesh, north-eastern India. The new species can be distinguished from all known congeners by the combination of the following characters: the second branched ray of pectoral fin with a distal filamentous extension; body colour pattern consisting of 9-10 vertically-elongated brownish spots or blotches along the flank, and 8-10 brownish saddles on back, the saddles not contiguous with the lateral blotches; lateral line complete; prominent, well-developed pelvic-fin lobe; a well-developed free posterior chamber of the air-bladder; and caudal fin with 7+8 branched rays. The new species occurs sympatrically with Physoschistura dikrongensis and P.

DNA barcoding of Amblyceps congeners (Siluriformes: Amblycipitidae) from Brahmaputra drainage in northeast India.

The genus Amblyceps is recognized with 18 valid species inhabiting in fast flowing rivers mostly in South and Southeast Asia. We generated 10 mtCOI sequences for four species of Amblyceps from Brahmaputra River drainage that along with conspecific database sequences were analysed in MEGA and Mr. Bayes while Automatic Barcode Gap Discover (ABGD) was performed at web interface.

Amblyceps waikhomi, a New Species of Catfish (Siluriformes: Amblycipitidae) from the Brahmaputra Drainage of Arunachal Pradesh, India.

Amblyceps waikhomi sp. nov. is described from the Nongkon stream which drains into the Noa Dehing River, a tributary of the Brahmaputra River, in Arunachal Pradesh, India.

Physico-chemical qualities of water in high altitude rice fish farming system of Ziro valley, Arunachal Pradesh, India.

Water in rice fields of mountain valley of Ziro, Arunachal Pradesh was investigated for physico-chemical characterization during rice fish farming season (Kharif) of 2013. Water temperature, dissolved oxygen, biological oxygen demand, free carbon dioxide, nitrate-nitrogen, phosphate-phosphorus, chloride, total hardness, calcium hardness, alkalinity, pH, total dissolved solids, specific conductivity and water depth were studied. This study revealed that the physical parameters of water in rice fields like water temperature, pH, total dissolved solids, specific conductivity and water depth were 23.

Glyptothorax mibangi, a new species of catfish (Teleostei: Sisoridae) from the Tisa River, Arunachal Pradesh, northeast India.

Glyptothorax mibangi, a new sisorid catfish, is described from the Tisa River of Arunachal Pradesh, India. The new species can be distinguished from its congeners in the Ganga-Brahmaputra and Barak-Surma-Meghna basins by the following combination of characters: an obtuse leaf-shaped thoracic adhesive apparatus with a spindle-shaped median depression, skin ridges present over the entire apparatus including the depressed region; ventral surface of pectoral spine and first pelvic-fin ray non-plaited; slender body with depth of 10.4-13.