fisheries – Page 3 – Southern Fried Science

A recipe for the evolution of smaller fish stocks?

November 11, 2010November 11, 2010 Bluegrass Blue Crab

Science

suess fish — fish face a tradeoff of where to use their energy, much like the polluted fish in the Lorax by Dr. Suess

Overfishing is most often implicated as the cause of decreasing fish stocks and that makes a lot of logical sense if you’ve ever seen a large commercial trawler unload its catch. But there very well might be another force at work in the precipitous decline in fish stocks worldwide: pollution. The basic premise is that it takes resources to deal with pollutants that normally would be given to growth and reproduction. Through polluting the ocean, we have selected for the fish individuals that can most effectively divert those resources, inadvertently also selecting for smaller fish that reproduce less. That has huge implications for the fish’s population dynamics and potentially total fish stock. More details below the fold…

Shark Conservation: The problem, the goal, and how to get there

August 9, 2010July 8, 2012 David Shiffman 12 Comments

Conservation, Science

The problem

Sharks consistently rank near the top of lists of American’s greatest fears. In reality, they have much more to fear from us than we do from them. Because of our actions, many species of sharks are on the verge of extinction. A recent International Union for the Conservation of Nature Shark Specialist Group report shows that fully 1/3 of open-ocean species of sharks are in danger of extinction in the next few decades. Many shark species have had population declines of over 90% in the last few decades.

Shark fin — Fins from a blacktip shark. Photo credit: David Shiffman

Piracy isn’t so good for fish after all

February 11, 2010February 11, 2010 David Shiffman 2 Comments

Science

The piracy situation in Somalia is a terrible human tragedy. That’s why when conservationist Joni Lawrence said that it was great because it helped fish stocks to recover, people like myself and Blogfish author Mark Powell got angry. As it turns out, Joni Lawrence wasn’t just being horribly insensitive- she was wrong.