Japan: Climate change causes fish species to lose weight, according to study

Published 2024년 2월 28일

Tridge summary

The weight of fish in the northwest Pacific Ocean declined in the 2010s as warmer water limited food supply, a University of Tokyo study reveals. These conclusions are drawn after researchers analyzed the individual weight and overall biomass of 13 fish species. Study shows that in the 1980s and 2010s, fish in northwest Pacific Ocean were lighter. Researchers attributed the weight decline of the 1980s to an increase in the Japanese sardine. In the 2010s, although there was a moderate increase in the population of Japanese sardines and mackerel, the team's analysis appeared to show that the reduction in the supply of nutrients to the surface of the ocean from the subsurface layers was an influential factor.

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Original content

The weight of fish in the northwest Pacific Ocean declined in the 2010s as warmer water limited food supply, a University of Tokyo study reveals. These conclusions are drawn after researchers analyzed the individual weight and overall biomass of 13 fish species. In the 1980s and 2010s, the fish were lighter. They attributed the first period of weight loss to more Japanese sardines, which increased competition with other species for food. During the 2010s, while sardine and Japanese mackerel numbers increased moderately, the effect of climate change warming the ocean appears to have resulted in greater competition for food, as the colder, nutrient-rich water could not easily rise to the surface. These results have implications for fisheries and policymakers trying to manage ocean resources under future climate change scenarios. Japanese anchovy and Japanese sardine make up a large proportion of the important fishing population in the area.Source: Europa Press This research focused ...

Source: Apnoticias