Global Warming Causing Declines of Fisheries in Lake Tanganyika

laketanganyikkaLakeTanganyika-Locn
laketanganyi

The people in the small fishing village along the shore of Lake Tanganyika rely heavily on the small sardines from the lake for their own food and also probably sell them dried in a nearby market. Credit: Andrew S. Cohen/ University of Arizona

Read more
The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing,according to a new report. The lake was becoming warmer at the same time in the 1800s that the abundance of fish began declining and the lake’s algae started decreasing. Large-scale commercial fishing did not begin on Lake Tanganyika until the 1950s.

The decrease in fishery productivity in Lake Tanganyika since the 1950s is a consequence of global warming rather than just overfishing, according to a new report from an international team led by a University of Arizona geoscientist.

The lake was becoming warmer at the same time in the 1800s the abundance of fish began declining, the team found. The lake’s algae — fish food — also started decreasing at that time.

The new finding helps illuminate why the lake’s fisheries are foundering, said study leader Andrew S. Cohen, a UA Distinguished Professor of Geosciences.

“Some people say the problem for the Lake Tanganyika fishery is ‘too many fishing boats,’ but our work shows the decline in fish has been going on since the 19th century,” Cohen said. “We can see this decline in the numbers of fossil fish going down in parallel with the rise in water temperature.”

About Mike Neuman

TwEnvironmentalist; Father; Senior Citizen; Husband, Former School Crossing Guard for City of Madison; Bike to Work Advocate; Animal/Children/People Lover (in general); Volunteer for Habitat for Humanity, Madison, Wisconsin, Anti-long distance travel (via fossil fuel burning); Against militarism in any form; Strong believer in people everywhere having the right to speak their minds openly, without any fear of reprisal, regarding any concerns; for those in authority to listen attentively AND, as warranted, ACT AS NECESSARY AND IN A TIMELY MANNER TO REDUCE OR ELIMINATE those concerns. For 59 years of my and my identical twin broth. er, Pat (from March 16,1950 until my brother, Pat, took his own life in June 2009 after his being fired from his NWS job and was then “allowed” to retire early from the federal government. He was fired despite having a long time and successful career as a flood forecaster with the Kansas City National Weather Service. Pat took a new position in the Midwest Regional Office in Minneapolis and the office he worked at moved to a new location outside the central city where there was less highway traffic to contend fowith a few years afterwards. Unfortunately, Pat’s work for the NWS went sour after he began to see the evidence for concern about rising global temperatures shortly after relocating to Minneapolis, and how they appeared to effect of flooding on the Red River that flows out of Canada before entering the U.S. in North Dakota. Pat and I conversed on a regular basis with other scientists on the Yahoo Group named “Climate Concern “ and by personal email. The NWS denied his recommendation to give his public presentation o n his research at the “Minneapolis Mall of America” in February 2000, which deeply affected h,im. He strongly believed the information ought be shared with the public to which I concurred. That was the beginning of the vendetta against my brother, Patrick J. Neuman, for speaking strongly of the obligations the federal government was responsible for accurately informing the citizenry. A similar response to my raising the issue of too many greenhouse gases being emitted by drivers of vehicles on Wisconsin highway system, my immediate supervisors directed: “that neither global warming, climate change nor the long term impacts upon the natural resources of Wisconsin from expansion of the state highway system were to be any part of my job requirements, and that I must not communicate, nor in a memorandum to all the bureau, shall any person who works in the same bureau I do communicate with me, neither verbally on the phone, by email

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: