Vertiv Introduces New Single-Phase Uninterruptible Power Supply for Distributed Information Technology (IT) Networks and Edge Computing Applications in Europe, Middle East, and Africa (EMEA)Read more Students from JA Zimbabwe Win 2023 De La Vega Global Entrepreneurship AwardRead more Top International Prospects to Travel to Salt Lake City for Seventh Annual Basketball Without Borders Global CampRead more Rise of the Robots as Saudi Arabia Underscores Global Data and Artificial Intelligence (AI) Aspirations with DeepFest Debut at LEAP23Read more Somalia: ‘I sold the last three goats, they were likely to die’Read more Merck Foundation and African First Ladies marking World Cancer Day 2023 through 110 scholarships of Oncology Fellowships in 25 countriesRead more Supporting women leaders and aspirants to unleash their potentialRead more Fake medicines kill almost 500,000 sub-Saharan Africans a year: United Nations Office on Drugs and Crime (UNODC) reportRead more Climate crisis and migration: Greta Thunberg supports International Organization for Migration (IOM) over ‘life and death’ issueRead more United Nations (UN) Convenes Lake Chad Countries, Amid Growing Regional CrisisRead more

Drought-hit California scales up plan to truck salmon to ocean

show caption
California's fish and wildlife department have taken "the proactive measure of trucking millions of hatchery-raised" juvenile salmon to the sea./AFP
Print Friendly and PDF

Jun 07, 2021 - 07:02 AM

OROVILLE — With chronic drought drying up rivers earlier than usual this year, California is scaling up a drastic operation to help its famous Chinook salmon reach the Pacific — transporting the fry by road in dozens of large tanker trucks.

The tasty migratory fish are typically born in rivers, swim to the ocean where they reach maturity and can remain for several years, before returning to their native rivers to spawn and die.

But drought-hit rivers with too little flow or unusually warm water can fatally disrupt that cycle, causing California’s fish and wildlife department to take “the proactive measure of trucking millions of hatchery-raised” juvenile salmon to the sea.

“Trucking young salmon to downstream release sites has proven to be one of the best ways to increase survival to the ocean during dry conditions,” said northern California hatchery chief Jason Julienne in a recent statement.

While road transportation of salmon dates back to the 1980s, early drought conditions this summer mean authorities plan to boost the size of the operation by 20 percent.

Trucks bearing nearly 17 million young salmon will travel more than 30,000 miles (48,000 kilometers) between April and June, helping the fry avoid streams where many have perished in the past.

One beneficiary will be the Feather River Hatchery, just below a dam north of Sacramento, which produces around eight million salmon fry annually from fish that naturally return to the rivers in which they were born.

The hatchery was built in 1967 to compensate for the destruction of natural spawning sites above the Oroville Dam, with a “fish ladder” — a narrow channel around a mile long with man-made steps — simulating the rapids of a mountain stream.

‘Don’t have any rain’ 

“The fish will migrate up, because the instinct of the fish is to go upstream when they’re ready to spawn,” said Anna Kastner, head of the hatchery, on a recent visit by AFP.

On a day in late May, several dozen salmon were crowded at the top of the ladder, ready to be diverted into the hatchery basin where the powerful fish — who can exceed 50 pounds (22.5 kilograms) in weight — will be tranquilized for tagging and receive vitamin injections.

Later, salmon ready to spawn will be harvested, and some 20 million eggs placed in incubation trays at the hatchery. They’ll make next year’s journey back to the Pacific as fry.

According to Kastner, the entire artificial process means “survivability in the hatchery is much higher than the river,” with around 85 percent of eggs able to produce fish that can be returned to downstream rivers or the sea near San Francisco and Monterey.

Already this summer California authorities have declared a drought emergency in more than 40 of California’s 58 counties.

Conditions in Butte County, where the Oroville Dam is located, are classified as “exceptional” — the highest category.

Exacerbated by climate change, conditions are likely to deteriorate until rainfall returns in five to six months.

“We want to make sure that we have the best available chance for this fish, because we don’t know what’s going to happen,” said Kastner.

“We don’t have any rain.”

MAORANDCITIES.COM uses both Facebook and Disqus comment systems to make it easier for you to contribute. We encourage all readers to share their views on our articles and blog posts. All comments should be relevant to the topic. By posting, you agree to our Privacy Policy. We are committed to maintaining a lively but civil forum for discussion, so we ask you to avoid personal attacks, name-calling, foul language or other inappropriate behavior. Please keep your comments relevant and respectful. By leaving the ‘Post to Facebook’ box selected – when using Facebook comment system – your comment will be published to your Facebook profile in addition to the space below. If you encounter a comment that is abusive, click the “X” in the upper right corner of the Facebook comment box to report spam or abuse. You can also email us.