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| The latest research on survival strategies of late migratory salmon: Endangered species need to be conserved to maintain population diversity |
Chinanews.
com, Beijing, October 29 (Reporter Sun Zifa) Springer Nature's professional academic journal "Nature-Climate Change" recently published an ecological research paper pointing out that California's large scale with a rare late migration strategy Salmon are more likely to survive drought and ocean heat waves than similar populations
.
The results of this study show that as environmental conditions continue to change with climate change, conservation strategies are needed to maintain population diversity and ensure the long-term resilience of this endangered species
The paper pointed out that population diversity is an important way for species to resist natural or man-made disturbances (including disturbances caused by climate change)
.
Salmon juveniles migrate thousands of miles from freshwater to salt water during their life cycle, and flexible migration time may be particularly important for salmon
Corresponding author of the paper and National Oceanic and Atmospheric Administration Flora Cordoleani and colleagues used the strontium isotope ratio of spring-type chinook salmon ear bones as a geographic location marker to reconstruct the 2007 Life history of 123 adult fish migrating to California's Central Valley in 2018
.
Instead of migrating to the ocean, these fish stay in the freshwater stream where they were born in the summer during the first winter or spring after birth
Late migration requires suitable cool rivers, which are expected to decrease rapidly due to climate change in the next few years, and most of them are located above dams that fish cannot cross
.
In view of this, the author of the paper pointed out that habitat connection should be considered to maintain population diversity, and believes that this will be essential for the long-term survival of the species
