Sao Paulo (AP): More than 100 dolphins have died in the Brazilian Amazon rainforest in the past week as the region grapples with a severe drought, and many more could die soon if water temperatures remain high, experts say.

The Mamiraua Institute, a research group of Brazil's Ministry of Science, Technology and Innovation, said two more dead dolphins were found Monday in the region around Tefe Lake, which is key for mammals and fish in the area.

Video provided by the institute showed vultures picking at the dolphin carcasses beached on the lakeside. Thousands of fish have also died, local media reported.

Experts believe high water temperatures are the most likely cause of the deaths in the lakes in the region.

Temperatures since last week have exceeded 39 degrees Celsius (102 degrees Fahrenheit) in the Tefe Lake region.

The Brazilian government's Chico Mendes Institute for Biodiversity Conservation, which manages conservation areas, said last week it had sent teams of veterinarians and aquatic mammal experts to investigate the deaths.

There had been some 1,400 river dolphins in Tefe Lake, said Miriam Marmontel, a researcher from the Mamiraua Institute.

"In one week we have already lost around 120 animals between the two of them, which could represent 5 per cent to 10 per cent of the population," said Marmontel.

Workers have recovered carcasses of dolphins since last week in a region where dry rivers have impacted impoverished riverside communities and stuck their boats in the sand. Amazonas Gov. Wilson Lima on Friday declared a state of emergency due to the drought.

Nicson Marreira, mayor of Tefe, a city of 60,000 residents. said his government was unable to deliver food directly to some isolated communities because the rivers are dry.

Ayan Fleischmann, the Geospatial coordinator at the Mamirau Institute, said the drought has had a major impact on the riverside communities in the Amazon region.

"Many communities are becoming isolated, without access to good quality water, without access to the river, which is their main means of transportation," he said.

Fleischmann said water temperatures rose from 32 C (89 F) on Friday to almost 38 C (100 F) on Sunday.

He said they are still determining the cause of the dolphin deaths but that the high temperature remains the main candidate. (AP)

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New Delhi (PTI): The Supreme Court on Thursday sought the Centre's response on a PIL challenging the constitutional validity of certain provisions of the Muslim Personal Law (Shariat) Application Act, 1937, on the ground that those are allegedly discriminatory against women.

A bench of Chief Justice Surya Kant and Justices Joymalya Bagchi and Vipul M Panchol took note of the submissions made by lawyer Prashant Bhushan, who appeared in the matter for petitioners Poulomi Pavini Shukla and the Nyaya Naari Foundation, and issued a notice to the Union Ministry of Minority Affairs.

The plea says the current Shariat inheritance rules are "manifestly discriminatory" against women, often granting them only half or less of the share allocated to their male counterparts.

Bhushan said the 1937 Act violates Article 14 (right to equality) of the Constitution.

He said matters of succession are civil in nature and do not constitute an "essential religious practice" protected under Article 25.

"Saying women will get half or even less than half compared to male counterparts is discriminatory," the lawyer said.