2020年3月13日 淡水魚の危機
「大型淡水動物の個体数は1970年から2012年までに世界で88%減った。最も打撃を被ったのが魚類で、94%減少した。中でも中国南部と南アジア、東南アジアが最悪で、99%を失った」99%…でも、100%ではない。取り戻せるものがあるはず。諦めてはいけない。 #生物多様性 #保全
https://globe.asahi.com/article/13202190
記事に出てくる原著や関係論文も挙げておきます。
#保全 #淡水魚
Globally, freshwater megafauna populations declined by 88% from 1970 to 2012, with the highest declines in the Indomalaya and Palearctic realms (−99% and −97%, respectively).
https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14753
we estimated the timing of extinction to be by 2005, and no later than by 2010. In addition, the paddlefish probably became functionally extinct (i.e. it was unable to reproduce) by 1993, before it went extinct.
https://www.sciencedirect.com/science/article/pii/S0048969719362382
Genetic diversity of freshwater species varied primarily across the regional basins and was negatively correlated with average river slope.
https://www.nature.com/articles/s41467-020-14409-7
IUCNも来年までGlobal assessment実施
#保全 #淡水魚
The IUCN Freshwater Biodiversity Unit, with support from the Toyota Motor Corporation, aims to make significant progress towards completing a globally comprehensive assessment of freshwater fishes by 2021
https://www.iucn.org/theme/species/our-work/freshwater-biodiversity/our-projects/global-freshwater-fish-assessment
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