Everything about hagfish is the best thing about hagfish, the battle for the deep-sea heats up, parasitic butt snails, and more! Monday Morning Salvage: December 17, 2017

Fog Horn (A Call to Action)

Flotsam (what we’re obsessed with right now)

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13 amazing things scientists discovered about sharks in 2013

Other than a certain week in August whose name we shall not speak here, 2013 was a great year for both shark science and the communication of that shark science. There were many important and fascinating discoveries, and many of the world’s top media outlets covered them. Presented here is a list of 13 amazing scientific discoveries made in 2013, in no particular ranking order. To make the list, research must have been published in a peer-reviewed scientific journal in 2013, and someone else other than me must have also thought it was awesome (i.e. it received mainstream media or blog coverage). In the interest of objectivity, I did not include any papers that I or my lab were directly involved with. Whenever possible, I’ve linked to an accessible version of the paper.

 

1) A two-headed bull shark!

From Wagner et al. 2013

From Wagner et al. 2013

 

Citation: Wagner, CM, Rice, PH, and Pease, AP 2013. First record of dicephalia in a bull shark Carcharhinus leucas foetus from the Gulf of Mexico. Journal of Fish Biology 82: 1419-1422.

Brief description: Researchers presented the first case of a bull shark embryo with 2 heads (the mother was caught by a Florida fishermen). In response to the most common question I received about this study, no, this animal would not have survived to adulthood.  While this is a cool discovery, the broader significance is somewhat minimal. As I told science writer Douglas Main in an interview about a similar study, “There have been a number of reports of deformed shark and ray embryos in recent years— two heads, one eye, etc. There’s no evidence to suggest these defects represent a new phenomenon or that they are harmful to shark populations as a whole.”

Media coverage highlights: A figure from this study was named one of the coolest science photos of the year by the International Science Times. It was also covered by National Geographic, the Guardian, and TIME magazine. Read More

Bad news for whale sharks: The world’s largest fish are being killed for bait and billboards

WhySharksMatter and a whale shark at the Georgia Aquarium

The world’s largest shark eats only plankton, couldn’t bite a human if it wanted to, and is one of the few sharks that could be reasonably described as beautiful. Globally, SCUBA divers pay an estimated $50 million each year for the chance to swim with these incredible fish. Their long migrations through international waters makes international cooperation necessary to protect them, which is particularly important because the 30 years it can take for these animals to reach reproductive maturity means that populations will take a long time to recover if they are overexploited. They’re listed by the IUCN Shark Specialist Group as Vulnerable globally. Between their charismatic nature, their inability to harm humans, and their value to ecotourism, it should be easy to convince governments to protect whale sharks *, making two recent reports all the more shocking.

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