The Beacon

Blog Tags: Hawaii

Tiny Fish Climb Giant Waterfalls for Love

The suction cup-like belly sucker of a round goby. The Nopoli goby boasts two such suckers for scaling waterfalls. Photo: Wikimedia Commons

 


If you think the dating world is tough for a human, consider for a moment the Nopoli rock-climbing goby of Hawaii, which scales waterfalls up to 100 feet high in order to breed. To put this feat in perspective, it’s the equivalent of a man of average height scaling the 29,029 feet of Mount Everest!


The process leading to this incredible feat is, quite literally, jaw-dropping: the tiny one-inch goby propels itself up the waterfall rocks with two suckers – one, common to all gobies, on the belly, and a second, particular to one goby genus, that develops when the mouth migrates from the tip of its head to its chin over the course of 36 to 48 hours, before it embarks on its journey. The fish uses these dual suckers alternately to inch up the rocky substrate of waterfalls to the waters above where the goby mates and deposits eggs in streams. Upon hatching, these juvenile gobies are swept into the ocean where they develop for several months before they return to freshwater streams and pools upstream where they may live for several years. To mate, the gobies of this new generation must repeat the waterfall-climbing process themselves.


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Searching for a More Responsible Way to Farm Fish

A salmon farm in Chile. © Oceana/ Eduardo Sorensen

Almost half of the world’s seafood now comes from fish farms, which can cause significant environmental harm if not responsibly managed.

Because many fish are confined to a small area, aquaculture can lead to high levels of pollution and outbreaks of diseases. Sometimes the farmed fish escape, which can hurt wild fish populations and the local ecosystem. Aquaculture can also lead to overfishing since carnivorous fish, like salmon and tuna, are fed large amounts of fishmeal made from prey fish like anchovies or herrings.

The Velella Project is an experiment off the coast of Hawaii that is trying to address some of the problems associated with aquaculture. Instead of enclosing fish in stationary nets or tanks like traditional farming methods, a specially-designed spherical pen, called the Aquapod, drifts through the water containing 2,000 hatchery born fish.


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Ocean Hero Finalists: Dylan Vecchione

Dylan explores a coral reef.

This is the eleventh in a series of posts about this year’s Ocean Hero finalists.

Today’s featured junior ocean hero finalist is 12-year-old Dylan Vecchione, who was nominated for his commitment to coral reef conservation.


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Not What You’d Call a Spring Chicken

Wisdom the albatross. © U.S. Geological Survey

Here’s a story to make you smile: the oldest wild bird in the country is a new mom -- again.

The United States Geological Survey and Fish and Wildlife Service announced on Tuesday that 60-year-old Wisdom, a Laysan albatross and the oldest known wild bird in the United States, is a new mother. Wisdom lives in the Midway Atoll National Wildlife Refuge in the Pacific northwest of the main Hawaiian island.

Albatrosses lay just one egg a year, and after a year in which they have successfully raised a chick, the birds may take a year off from breeding. Not Wisdom. She also nested in 2008, 2009 and 2010. Officials said she probably has raised 30 to 35 babies in her lifetime.

Wisdom’s longevity is a hopeful sign amid otherwise distressing trends for the seabirds. Nineteen of the 21 species of albatross are threatened with extinction, according to the IUCN. Major threats to the birds include plastic pollution in the ocean and capture in long-line fisheries. The birds ingest marine debris, mostly plastic, and feed it to their chicks, lessening their chance of survival.

Let’s hope more birds live as long as Wisdom. Help their chances: take our pledge to reduce your plastic use if you haven’t already.


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Where Are They Now?: Chanel Gemini, Nika Kashyap & Sabina Van Tilburg

This is the fourth in a series of posts about the 2009 Ocean Heroes finalists.

Today we’re catching up with 2009 ocean hero finalists Sabina van Tilburg, Chanel Gemini and Nika Kashyapone, the three girl scouts who were instrumental in convincing the state of Hawaii to become the first state in the U.S. to officially recognize World Oceans Day. They obtained over 650 signatures on their petition and received the support of many non-profits and government agencies such as the Nature Conservancy and NOAA.

Here’s Sabina's update:

“As a Girl Scout troop, we are currently working on our Gold Award, the highest award for Girl Scouts and selling lots and lots of cookies! We have recently been focusing on recycling, gardening, buying local, and learning more about our community. Along with that we have been participating in a lot of beach clean ups, fishpond clean ups and restorations, working in the lo'i which are Hawaiian taro patches, and counting whales with NOAA, which you can learn more about at http://hawaiihumpbackwhale.noaa.gov/involved/ocwelcome.html "

Inspired? Nominate someone you know -- young or old -- to be this year's ocean hero.


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