ગુજરાતી
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Sea creatures are going extinct in mass, crisis in Gujarat
Greenhouse gas emissions continue to warm the world’s oceans. According to a study, marine and aquatic biodiversity may become increasingly extinct in the next few centuries.
15th place in fish production of lakes in Gujarat. Who can come first. The Madhuban reservoir of Damanganga in Valsad produces 60,000 tonnes of fish per month. Fishing is being done by making 2500 cages in the floating platform between the dams.
Gujarat produced barely 1.50 lakh tonnes of fish in 2019-20. Filling the lakes can produce 5 lakh tonnes. It couldn’t happen. Furthermore, industries in Gujarat dump so much polluted water into rivers, lakes and dams that millions of tons of fish die. In Gujarat, 5 lakh tonnes of fish have been lost due to pollution. Even though at least 1.5 million tonnes of fish can be produced in Gujarat today, it cannot be done. Because of that pollution and weather.
Fish can provide employment to at least 15 lakh families in Gujarat, but not because of pollution and weather.
A total fish production of 12.59 million metric tonnes was recorded in 2017-18 with 3.69 million metric tonnes of fish production from the coastal region.
Gujarat Fisheries Board has kept Vietnamese Pangasius fish in Madhuban Dam for the Blue Revolution. This fish can survive without water for three days. The fish here has a good demand in Assam, Jharkhand. Gujarat’s fish cannot withstand climate change. So now foreign fish are being brought in.
Freshwater fish is produced in 4 lakh hectares. In which there is a big threat to the fishes in the lakes of Gujarat at this time. There are lakes in 71 thousand hectares of freshwater. There are reservoirs (dams) in 2.43 lakh hectares. The 3765 km long Bar Masi is a river and canal. There are waterlogged lakes in 12 thousand hectares. Narmada dam is in 35 thousand hectare, pond is in 10 thousand hectare, water log vista is in 6 thousand hectare.
These freshwater areas are producing 1.20 lakh tonnes of fish.
The study was conducted by researchers from Princeton University. If emissions are not stopped, rising temperatures and lack of oxygen could lead to massive loss of marine species.
There is a high risk of biodiversity loss and extinction of polar species by 2100. Rapid reduction in greenhouse gas emissions could prevent up to 70 percent of the mass extinctions of marine species. There’s still plenty of time to stop CO2.
The present collapse is linked to the geographic pattern of the end-Permian extinction 2500 million years ago. Earth’s worst extinctions have been linked to global warming and a lack of oxygen from the oceans. Sea temperature rises and oxygen availability decreases. The abundance of marine life decreases.
Climate warming will reduce water temperature and oxygen. Warm water is dangerous for the species living in the environment. Hot water also contains less oxygen than cold water. Due to which the circulation of the ocean becomes more sluggish, which reduces the supply of oxygen at depth.
The metabolic rate of species increases with water temperature, so oxygen demand increases when supply is low. Species are likely to suffer significant damage if oxygen is supplied less than what is needed.
Physiological systems in marine animals are able to withstand environmental changes to some extent. Polar species are more likely to be globally threatened. The supply of oxygen in warm water is too low for some species.
Climate change will make large parts of the oceans uninhabitable or desolate. Climate change currently affects 45 percent of marine species at risk of extinction, but is the fifth most significant threat after overfishing, traffic, urban development and pollution.
