Science – Page 53 – Southern Fried Science

Pseudoscience Redux: Maximum (un)Sustainable Yield

October 5, 2011October 4, 2011 Bluegrass Blue Crab

Science

This post was originally published on September 8, 2010 as a part of our first Week of Ocean Pseudoscience. Enjoy!

In 1954 and 1957 Gordon and Schaefer respectively described the idea of maximum sustainable yield (MSY) – that is, the amount of fish that could be taken by commercial fishing operations to maximize reproduction by the system year after year. Since then, it has been heralded as the mathematical panacea to fisheries management.

Gordon and Schaefer also described the maximum economic yield which threw price relations into the mix. It describes the point at which the fishers will make the most money, accounting for revenue and their expenses. Note in the graph below the fold that the maximum economic yield (MEY) is below the MSY in terms of effort. Gordon and Schaefer imagined a private manager or government overseer that could calculate the MEY and regulate fisher behavior in order to meet it. The idea was meant to be win-win for the fishers and the fish.

Misunderstood Marine Life # 5 – Lionfish

October 4, 2011October 4, 2011 Bluegrass Blue Crab

Science

Joel_Rotunda_-_Lionfish — Thank You Joel Rotunda, ufwildlife.ifas.ufl.edu

Last time you went to an aquarium, you probably saw a lionfish swimming happily in a tank filled with a bit of coral or rocky bottom, calmly flipping its fins about in the slight current created by the water pump. Now think back to the interpretive sign next to the tank – did it say that the exhibit displayed an invader or an awesome, weird aquarium fish? Depending on which part of the world you’re in, you might get a different answer. Along the east coast of the United States, though, it should say the former. Lionfish have spread from south Florida throughout the Caribbean and up to North Carolina, where they can be found on reef habitat (either natural or manmade via the sinking of ships) at a concentration of 400 fish per square meter. And they eat everything in sight.

Unraveling the mysteries of Steller’s Sea Ape

October 4, 2011September 16, 2016 Andrew Thaler

Science

Last year for our Week of Ocean Pseudoscience, we counted down our top seven marine cryptids. Number seven was the elusive Steller’s Sea Ape, documented only once by renowned naturalist Georg Wilhelm Steller. Even though the Sea Ape has not been seen since, Steller’s deserved reputation as a world class naturalist has kept the Sea Ape story alive. In his journal, he reports that:

During this time we were near land or surrounded by it we saw large numbers of hair seals, sea otters, fur seals, sea lions, and porpoises…. On August 10, we saw a very unusual and unknown sea animal, of which I am going to give a brief account since I observed it for two whole hours. It was about two Russian ells in length, the head was like a dog’s, with pointed, erect ears. From the upper and lower lips on both sides whiskers hung down which made it look almost like a Chinaman, The eyes were large; the body was longish round and thick, tapering gradually towards the tail. The skin seemed thickly covered with hair, of a grey color on the back, but reddish white on the belly; in the water, however, the animal appeared equally reddish and cow colored. The tail was divided into two fins, of which the upper, as in the case of sharks, was twice as large as the lower.

source

The post-oil spill Gulf of Mexico

October 4, 2011October 4, 2011 David Shiffman

Science

As some of you probably remember, there was an oil spill in the Gulf of Mexico last year. You can be forgiven for not remembering it, as our news media hasn’t been talking about it very much lately. In fact, if your only source of oil spill news was the mainstream media, you probably think that the Gulf is doing great! A little over a year ago, CNN ran a story about how the BP oil well that caused the spill was “effectively dead” and was “no longer a threat to the Gulf”. CNBC (and many others) ran stories about how 75 percent of the oil from the spill was gone from the Gulf. Bloomberg reported that the Gulf would recovery completely by 2012. London’s Telegraph celebrated a dramatic recovery after only one year. Whew… things aren’t as bad as we feared, and the Gulf has almost totally recovered! Or has it?

Misunderstood Marine Life # 6 – Jellyfish

October 3, 2011October 1, 2011 Bluegrass Blue Crab 3 Comments

Popular Culture, Science

“Yikes! It’s a jellyfish, get out of the water!”

I can’t remember how many times I heard this shriek from my friends as a kid around the end of July, when loads of comb jellies washed ashore, the casualties of their massive breeding efforts. Like most kids with a good poking toe, however, I figured out that these jellies couldn’t hurt me. For a number of reasons, not all jellyfish equal a painful sting.

Furthermore, like many sea creatures, they are symbolic of a beautiful greater ecosystem at work but often lead to squeaks and squeals of fear rather than smiles of appreciation. I’ll go so far to say that jellyfish are a good candidate to be a charismatic creature of the sea.

10 misrepresentations about climate change

October 3, 2011October 2, 2011 David Shiffman 146 Comments

Science

Few scientific fields generate as much controversy as climate change. Misunderstandings, misrepresentations, and outright lies are common. While environmentalists rightly criticize anti-global warming activists for not being truthful, neither side is innocent. Presented here are five common misrepresentations from both sides and the truth about those issues.

Misunderstood Marine Life # 7 – The Living Fossils

October 3, 2011October 1, 2011 Andrew Thaler 3 Comments

Science

Horseshoe Crabs, Coelacanths, Seven-gilled sharks, hagfish. Throughout the oceans there are creatures whose primitive bodies hearken back to earlier days in our evolutionary history. They possess basal characteristics that are more akin to those of the ancestors of our contemporary phyla. Because we can look into these organisms and learn something about our own deep past, we think of them not as modern descendants, but as living fossils, relics of a primeval state.

This is, of course, a misnomer.

Thank You NSF

September 28, 2011September 28, 2011 Bluegrass Blue Crab

Science

The National Science Foundation has recently announced the NSF Career-Life Balance Initiative largely in hopes of retaining women in the sciences past their the dissertation years. Most notably, the Initiative allows a year long pause in awarded grants to new parents. This pause matches the pause in the tenure process that most universities offer (but … Read More “Thank You NSF” »

Thorny skate protection: NAFO falls short

September 26, 2011 David Shiffman

Conservation, Science

Last week, I previewed the annual NAFO meeting. Two elasmobranch conservation measures (reducing the Total Allowable Catch for thorny skates to the level that the scientific council recommended and requiring fishermen to report the species of the sharks they catch) were to be discussed. That meeting is now concluded, and the results, while not … Read More “Thorny skate protection: NAFO falls short” »

WhySharksMatter talks about sharks and shark week on Dr. Kiki’s Science Hour

September 22, 2011September 22, 2011 David Shiffman

Science

Check out my interview with Kristen “Dr. Kiki” Sanford on Twit TV’s “Dr. Kiki’s Science Hour!