Science – Page 28 – Southern Fried Science

Sharks aren’t always the top of the food chain

September 3, 2014 David Shiffman 1 Comment

Most people think of sharks as being apex predators, large, fearsome hunters sitting right at the top of the ocean food chain. Of course, that isn’t always the case. There are more than 500 known species of sharks, and they vary in size from the size of a pencil to the size of a school bus. In many cases, there’s a larger predator in their environment, which can lead to some surprising and amazing interactions.

A crocodile ate a bull shark

Brutus, a famous crocodile in Australia, was recently photographed eating a juvenile bull shark. Southern Fried Science writer Sarah Keartes has the full story at EarthTouch.

Great white shark movements at Geyser Rock

September 3, 2014December 8, 2014 Michelle Jewell

Science

Michelle Wcisel is a Zoologist specialized in predator/prey behaivour and the Scientific Communicator for EDNA Interactive. She has spent the past 4 years studying the behaviour of white sharks and Cape fur seals at Geyser Rock, ‘Shark Alley’, South Africa.

Animal movement is often shaped by natural barriers; a fish can’t leave the river it swims in, a tortoise is going to struggle to climb a cliff face, and a pangolin can’t swim across the sea. These barriers come quite naturally to the animals, yet researchers have often struggled to account for these constraints in movement analysis, particularly when it comes to estimating home range (or ‘Utilization Distributions’, UDs). Unfortunately, the few solutions that have attempted to account for barriers are often incredibly complicated without providing much improvement overall, so previous studies have been forced to simply ‘clip out’ the parts of the estimate that extend over these inconceivable areas (i.e. Heupel et al. 2004; Hammerschlag et al. 2012; Jewell et al. 2012).

Shark Week 2014: documentary reviews, tweets, and media coverage

August 26, 2014 David Shiffman 3 Comments

Blogging, Popular Culture, Reviews and Interviews, Science

Another Shark Week has come and gone, and despite being out of the country at the time, I’ve managed to keep up my record of never having missed a single Shark Week documentary. I gotta tell you, though, some of them are really hard to watch. While there there is undoubtedly some great educational programming focusing on science, natural history and conservation, the Discovery Channel is doubling down on the troubling recent trend of blatantly lying to viewers with fake documentaries that use actor playing scientists and CGI video. In a time when public misunderstanding and distrust of science and scientists is already high, the Discovery Channel has decided to actively perpetuate misunderstanding and distrust of science and scientists. I’ve included my reviews (which originally were posted on my Facebook page after each show) of each of the documentaries below, along with a link to the Storify of my twitter reactions and links to some of the media coverage.

Upwell held another successful Sharkinar, bringing together scientists, conservationists, communicators and educators to talk about how “Team Ocean” can best take advantage of the increased public interest in sharks during Shark Week. Indeed, many members of Team Ocean were able to use the temporary increase in public interest in sharks to get important messages out to the media, and I’ve linked to and summarized some of the best examples below, but imagine how much more effective we could be if we didn’t have to first debunk the lies aired on a supposedly educational non-fiction television channel?

5 simple things you can do to improve U.S. shark and ray management

August 16, 2014 Guest Writer

Science

Sonja Fordham President, Shark Advocates International — Sonja Fordham
President, Shark Advocates International

Sonja Fordham founded Shark Advocates International as a project of The Ocean Foundation in 2010 based on her two decades of shark conservation experience at Ocean Conservancy. She is Deputy Chair of the IUCN Shark Specialist Group and Conservation Committee Chair for the American Elasmobranch Society, has co-authored numerous publications on shark fisheries management, and serves on most of the U.S. federal and state government advisory panels relevant to sharks and rays. Her awards include the U.S. Department of Commerce Environmental Hero Award, the Peter Benchley Shark Conservation Award, and the IUCN Harry Messel Award for Conservation Leadership.

Most Americans by now must know it’s Shark Week, but did you know that the Discovery Channel headquarters are mere steps from the headquarters of the National Marine Fisheries Service (NMFS), and that right now — and rather often — fishery managers in that NMFS building are soliciting comments on US shark fishing rules?

Shark Week is winding down just as several key opportunities to help US sharks are being announced. Aside from controversy over some programming, other shows, the associated press coverage, and the veritable social media frenzy have sparked a lot of concern for sharks, and sent many Americans on a hunt for things that they can do to help. I welcome that interest and am taking the opportunity to make a plea for some unique, hand-crafted comments and personalized testimony about timely policies for several particularly deserving Atlantic shark and ray species.

Taking these actions won’t be quite as easy as pushing a button on an automatic petition, but I believe – because of the relatively low profile of these species and the increased influence of original comments – that they can truly make a difference. If heeded, your advice can lead not only to better conservation of US shark and ray species, but also to better examples for other countries to follow. Here goes (see the hyperlinks for more information and contact details):

Background information on our “trophy fishing for species threatened with extinction” paper

August 11, 2014September 4, 2014 David Shiffman

Conservation, Science

A giant pangasius, one of the Endangered species of fish that is targeted by trophy fishermen. Photo by user GV_Fishing, WikiMedia Commons

Andrew and I (along with several co-authors) have a new paper out in the journal Marine Policy entitled “Trophy Fishing for Species Threatened with Extinction: A way Forward Based on a History of Conservation.” You can read the paper here, and view the official press release here (will be up soon) .

We believe that this is an important topic that does not get enough attention, and we wrote the paper to review the scope of the problem, propose an easily achievable solution, and facilitate a long overdue discussion. Although we intentionally wrote the paper to be accessible to anyone, this blog post serves to explain the concepts and issues in the paper even further. We are happy to answer any questions people have about the paper, just ask them in the comments section below.

Shark of Darkness: Wrath of Submarine is a fake documentary

August 10, 2014March 18, 2015 Michelle Jewell 119 Comments

Popular Culture, Science

Shark Week has done it again with their Shark of Darkness nonsense. This show goes after everyone, from the whale watching industry, to shark cage diving, to South Africa as a country, and literally broke my heart to watch.

As always, a brief and vague disclaimer appears after all the credits have rolled. — As always, a brief and vague disclaimer appears during the show.

The fake-u-mentary is supposedly based in Hout Bay, but continually shows a map of Dyer Island and Geyser Rock and refers to Shark Alley that are all in Gansbaai, ~100km to the east. So why would they say Hout Bay? If you google “boat capsized in Hout Bay”, you will find that there was a boat which capsized outside of Hout Bay in 2012, killing 2 passengers onboard. This boat was capsized by heavy swell in the middle of the day and had nothing to do with a shark, let alone a mythical one. So I can only assume that Discovery Channel chose to include this very real tragedy in order to somehow legitimize their fake-u-mentary. This is horribly insensitive.

Megalodon: the New Evidence is a fake documentary

August 7, 2014 David Shiffman 3 Comments

Blogging, Popular Culture, Science

So was last year’s “Megalodon: the monster shark lives.” Both Shark Week specials claim to show evidence that Carcharocles megalodon, the largest predatory shark that ever lived, is still alive. In both cases, the evidence is 100% completely and totally fake. A disclaimer from “the monster shark lives” Video evidence is CGI, images are photoshopped, and … Read More “Megalodon: the New Evidence is a fake documentary” »

The Dark Side of Academia

August 7, 2014September 2, 2014 Chris Parsons

Blogging, Science

Dr. Chris Parsons has been involved in whale and dolphin research for over two decades and has been involved in research projects in every continent except Antarctica. Dr. Parsons is an Associate Professor at George Mason University as well as the undergraduate coordinator for their environmental science program. He’s a member of the scientific committee of the International Whaling Commission (IWC), has been involved in organizing the International Marine Conservation Congress (IMCC) (the world’s largest academic marine conservation conference) and is currently the Conference Chair and a Governor of the Society for Conservation Biology. In addition, Dr. Parsons has published over 100 scientific papers and book chapters and has written a textbook on marine mammal biology & conservation.

Listen, my Sith apprentice, strong in knowledge you are but there are those who are stronger and more intelligent than you, but to persevere and gain in status, strong in the dark side you must become. In these times funding is limited, tenured positions are few, and competition is great. Graduate students are many, and many of these have ideas for new research and new hypotheses that pose a threat to the current order. The hierarchy must be maintained with us at the apex, and no competition must be allowed. Nurturing, cooperation, and egalitarianism -those are the characteristics of the light side and the light side is weak, and progress on the light side is slow. So my Sith apprentice, here is my advice to you to progress and succeed, especially when there are those around you who are more innovative, knowledgeable and intelligent than you.

Read More “The Dark Side of Academia” »

Fun Science FRIEDay – One microbial trash is another’s microbial treasure!

August 1, 2014September 1, 2014 Kersey Sturdivant 1 Comment

Science, Uncategorized

Happy FSF!

You know that old saying, the one that explains how something devalued by one person is of the utmost value to another.

Well this week we bring you an analogy of that quote in nature, and in the form of microbes.

Leishmaniasis… have you heard of it? If not, do not worry, I had not either before I began writing this piece, and subsequently almost gagged while googling “appropriate” photos to accompany this piece. Leishmaniasis is a disease caused by the protozoan parasite Leishmana. The vector that spreads this wonderful treasure? Sand flies. If you are unfortunate enough to get this disease it can turn your skin into all manner of foul lookingness. See Exhibit A.

Exhibit A

Skin ulcer on the hand due to leishmaniasis. (Photo credit: CDC Dr. S. Martin)

Busting Ocean Myths: This anglerfish is not as kink as you think.

July 28, 2014August 4, 2014 Andrew Thaler

Science

The claim: Deep-sea Anglerfish have parasitic dwarf males that fuse to their mates and become nothing more than wibbly gonads hanging off of the much larger female.

Who said it: Well, pretty much everyone. This Oatmeal Comic, Ze Frank, me.

Status: Sometimes true, sometimes false.

Melanocetus johnsonii. Photo by Edith Widder.

I’d like you to meet a very dear friend of mine. This is Melanocetus johnsonii, the humpback anglerfish. If you follow the deep sea at all, you’ve probably met this delightful creature. She was featured on the cover of time magazine, barely losing out to Newt Gingrich for 1995 Vertebrate of the Year. Since then, she has been a standard-bearer for the deep sea, an iconic species, immediately recognizable. Stories of her exploits abound, and no story is more compelling that the tale of the hapless male anglerfish, a parasitic dwarf that lives its entire adult life fused to the larger, more capable female angler fish.

There’s just one problem.

Melanocetus johnsonii, along with the four other anglerfish that make up genus Melanocetus, don’t have parasitic males. Males of this genus are still significantly smaller and lack lures, but they retain their free-swimming lifestyle into adulthood, occasionally biting into the side of a much larger female for a temporary coupling, where gametes and food are exchanged. This temporary coupling, in which no tissue fusion takes place, has been observed only three times: once during the filming of the BBC Blue Planet documentary; once off the coast of Japan; and once, confusingly between a male Melanocetus johnsonii and a completely different species, Centrophryne spinulosa. In none of these instances was the connection permanent, and no reduced males have even been found attached to a Melanocetus.