The mystery surrounding the deaths of at least 877 dolphins in Peru deepened on Wednesday as the government said human activity was not to blame but failed to pinpoint a natural cause for the massive die-off.

A final report from the Peruvian government's Ocean Institute, which manages one of the world's richest marine ecosystems, said the dolphins did not die from a lack of food, hunting by fishermen, poison from pesticides, heavy metal contamination, an infection or a virus.

LUCKNOW: A small fry from the coastal belt of India could prove a potent weapon in the battle against the menace of Japanese encephalitis in eastern Uttar Pradesh. This small killer fish, Gambusia, is known for devouring mosquito larvae - 100 to 300 per day. So, the UP government has added it to its armoury for controlling mosquitoes, which are primary responsible for the spread of the dreaded disease that has claimed more than 5,000 lives in the past seven years.

Plans are afoot to increase the production of inland fish in the State to three lakh tonnes a year.

Presently, of the total 5.97 lakh tonnes of fish production in Tamil Nadu, inland fish production is only 1.72 lakh tonnes and marine fisheries is 4.25 lakh tonnes. To make available more fish seeds and advanced fingerlings from 7 cm to 10 cm stage, the capacity of fish hatcheries and fish-rearing centres across the State is being enhanced and additional infrastructure created. Catla, Rohu, Mrigal varieties of Indian major carp (kendai meen) and common carp are bred and reared at these centres.

Sharks have a reputation of being apex predators of the sea. But even they have their weak points. Many shark populations have plummeted in the past three decades as a result of excessive harvesting — for their fins, as an incidental catch of fisheries targeting other species, and in recreational fisheries. This is particularly true for oceanic species. However, until now, a lack of data prevented scientists from properly quantifying the status of Pacific reef sharks at a large geographic scale.

A Peruvian minister has denied claims that explosions used in oil exploration are to blame for the deaths of hundreds of dolphins.

Fisheries Minister Gladys Triveno said a government investigation showed that natural causes were to blame.

She contradicted a study by an environmental group which suggested that explosions had caused the deaths.

The animals have washed up along Peru's northern coastline since the beginning of the year.

Overfishing and exploitation of marine biodiversity would result in the disappearance of fish species in the next 50 years, warned M.F. Farooqui, Special Secretary, Union Ministry of Environment and Forests, on Tuesday.

Addressing a function organised in connection with the International Day for Biological Diversity, Mr. Farooqui said beyond the exclusive economic zone, everyone seemed to be exploiting the marine biodiversity and nobody was taking responsibility for conservation.

Clocking a compounded annual growth rate (CAGR) of about 11.48 per cent in 2004-05 and 2010-11, Karnataka has emerged as the leading coastal State with the highest growth in fish production, according to a research and analysis released by the Associated Chambers of Commerce and Industry of India (ASSOCHAM).

Goa, on the other hand has registered a negative growth rate of fish production as the fish production has slipped from 9.9 lakh tonnes in 2004-05 to 94,000 tonnes now because of over-exploitation of fishery resources, highlights the ASSOCHAM analysis.

A huge swath of the waters off Antarctica must be protected from fishing and other industries, environmental groups said on Monday.

More than 40% of the region needs to be given protection before one of the world's last true frontier areas is damaged irreparably by human activity, the Antarctic Ocean Alliance (AOA) said.

If Americans ever eat genetically engineered fast-growing salmon, it might be because of a Soviet biologist turned oligarch turned government minister turned fish farming entrepreneur.

That man, Kakha Bendukidze, holds the key to either extinction or survival for AquaBounty Technologies, the American company that is hoping for federal approval of a type of salmon that would be the first genetically engineered animal in the human food supply.

Large stretches of salmon-spawning streams and thousands of acres of wetlands would be wiped out if a large-scale mining project were to be built in south-western Alaska’s copper-rich Bristol Bay region, according to a report issued by the Environmental Protection Agency.
The report, while not directly addressing it, is a potential blow to the massive Pebble copper and gold mine operation proposed by an international alliance of mining interests, and opposed by environmentalists and local native groups.