Heat Wave Kills Clams, Crabs in Japan

TOKYO, Aug. 4 (UPI) — A heat wave has caused mass deaths of large quantities of clams and crabs in Tokyo Bay, ecological researchers say.

Scientists from Toho University say they believe the die-off of up to 80 percent of baby-neck clams was due to lack of oxygen when the extended heat wave accelerated the decomposition of marine algae, The Yomiuri Shimbun reported.


A Toho graduated student noticed the phenomenon July 28, prompting an urgent study.

Large amounts of edible green algae called sea lettuce grow every year on tidal flats in the bay.

Researchers think the algae dissolved abruptly as the heat wave warmed waters in the bay, resulting in less oxygen in the water, making it deadly for certain species of clams and crabs.

Weather records show the average temperature in the Tokyo area this year has been 5 degrees F higher than normal, The Yomiuri Shimbun reported.

Copyright 2010 United Press International, Inc. (UPI). Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI’s prior written consent.


Categorized | Other, Tidal
Leave a Reply

You must be logged in to post a comment.

Advertisement