Science – Page 74 – Southern Fried Science

Ethical Debate: Killing sharks for science?

June 1, 2010December 31, 2011 David Shiffman 25 Comments

While attending last year’s American Elasmobranch Society conference, I was asked to fill out a survey concerning my views on lethal shark research. My response, along with those of many other participants, has now been analyzed and written up into a new essay in the Journal of Conservation Biology. Michelle Heupel and Colin Simpendorfer argue that lethal sampling of some individual sharks is sometimes necessary in order to get the data needed to protect those animals’ entire species. However, attitudes about conservation in general and sharks specifically are changing, and many (including these authors) feel that this is starting to affect marine biology as a science.

WhySharksMatter is going to Cairns, Australia!

May 31, 2010May 31, 2010 David Shiffman

Science

Later this week, I’m headed to the land down under to attend Sharks International, a once-a-decade shark science conference. Scientists from six continents and dozens of countries will be presenting their research on sharks, rays, skates, and chimeras. This will be the first time I’ve presented my own research at any scientific conference. I’ll try … Read More “WhySharksMatter is going to Cairns, Australia!” »

Second to last day of experiments

May 31, 2010 Bluegrass Blue Crab

Science

At this point we’re running on autopilot a bit. As one of the Georgia students pointed out earlier today, we’ve become incredibly efficient at the protocols, just in time to start heading home tomorrow.

People have also had time to start analyzing their data from the first round of experiments. Interestingly, the phytoplankton community has changed significantly in our little patch of ocean over just the short time we’ve been here. Brian commented “I always assume, incorrectly, that the system will be static throughout the cruise. But it’s not, it’s surprisingly dynamic every year”.

The red snapper controversy: Interviews with fishermen

May 31, 2010 David Shiffman 2 Comments

Conservation, Science

New proposed regulations for the red snapper fishery have conservationists celebrating and fishermen marching on Washington, DC in protest. Quota reductions are some of the most extreme and far-reaching I’ve ever come across. A huge area of the ocean (over 10,000 square miles) has been targeted for closure of not just the red snapper fishery… but all “bottom fishing” of the 73 species in the snapper-grouper management complex. According to the South Atlantic Fisheries Management Council, such severe regulations are necessary because of the degree of overfishing that has been occurring (8 times the sustainable level since 1970). As a result of this overfishing, the stock is also considered to be seriously overfished- the National Marine Fisheries Service estimates that current stocks are 3% of target size. A total area closure is necessary, according to the SAFMC, because even accidental bycatch of red snapper while trying to catch other snapper-grouper complex fishes can seriously impact such a reduced population. Since these fish live in relatively deep water, they often die after being released. Finally, an 87% reduction in red snapper mortality needs to occur over many years (possibly decades) to rebuild stocks. These regulations are in place right now via a process called “the interim rule”, and meetings will take place later this year to determine if they should remain in place.

Because of the controversy surrounding this topic, SAFMC science personnel were unable to be interviewed. However, . Zack Bowen, a charter boat operator from Savannah, Georgia, and Blaine Dickenson, a recreational fishermen and SAFMC advisor, agreed to participate.

Hawaii shark fin bill signed into law!

May 30, 2010May 30, 2010 David Shiffman 3 Comments

Conservation, Science

A few days ago, Governor Linda Lingle of Hawaii signed the recently passed shark fin bill into law. Starting on July 1 of 2011 it will be illegal to possess or sell shark fins within the state of Hawaii. Though this law, the strongest shark protection law in North America, is a huge success, we … Read More “Hawaii shark fin bill signed into law!” »

Who should you be following for oil spill news?

May 28, 2010May 30, 2010 Andrew Thaler 11 Comments

Conservation, Popular Culture, Science

Update: we’ve promoted this post to a full page on the blog. Please go here for the most up-to-date version. The comment thread will remain active here.

Second Friday at Sea

May 28, 2010May 29, 2010 Bluegrass Blue Crab 1 Comment

Science

My day began with a balancing contest on the stern deck – who could stand on one foot the longest? It was an official welcoming to the world of those with sea legs. The rest of the day blended in with yesterday, when we ran our second diel experiment – nothing new there from the science end.

We pulled up our incubation/grazing experiment to look at the effect of grazers. We had dropped 96 bottles, each a different manipulated community, overboard. Turns out something got hungry and took a bite of the net bag that was holding the bottles underwater. We’d like to think shark, but that’s entirely our imaginations run wild. We spent the entirety of the day after lunch filling up large plastic carboys with water from the Sargasso – a prized medium for phytoplankton researchers. The water out here, though a classic mix of sea elements is very “clean”, meaning it has extremely low levels of organic matter, trace metals, or really any nutrients at all. It’s what makes the waters out here such a beautiful blue and is the reason we haven’t seen much life outside of the phytoplankton in our tubes the entire trip.

One week left: time to get to work!

May 27, 2010May 26, 2010 Bluegrass Blue Crab

Science

rosette — Same boat, different cruise. Recovery of the CTD

A stormy beginning makes for a busy end. We spent the day prepping for a couple of experiments that will happen tomorrow while we’re all awake for the second round of the diel experiment. We sent a go-flow, typically used to collect data on trace minerals in the water, overboard to gracefully collect and filter seawater to be used for growth medium in an incubation experiment. It’s hard to think about treating seawater nicely, but apparently the go-flow apparatus is designed to not split any cells upon entry or exit. This ensures that the phytoplankton we’re trying to grow and measure will have the most realistic experience in their little containers as possible tomorrow.

Project S – The creation of the Rimicanoe

May 26, 2010May 27, 2010 Andrew Thaler 6 Comments

Science

Rimicaris exoculata, the eyeless vent shrimp is an iconic member of hydrothermal vent communities on the Mid-Atlantic Ridge. The shrimp is characterized by a lack of eyes, an enlarged carapace, chemoautotrophic symbionts that they farm in their gills, and, most curiously, large photoreceptors on the top of its carapace. A solution to the mysterious eyespots was first hypothesized by Cindy Lee Van Dover, who inferred that Rimicaris exoculata can “see” low-level light produced by hydrothermal vent effluent.

Iconic, novel, biologically fascinating; of all the adjectives I can think of to describe Rimicaris exoculata, the one that jumps immediately to mind is sort-of-canoe-shaped. In fact, it’s so sort-of-canoe-shaped that this hydrothermal vent shrimp needs to have a canoe made in its image.

Presenting the grand unveiling of Project S – the Rimicanoe (sensu strictissimo Rimicaris exocu-yacht-a)!

Project S revealed! The <i>Rimicanoe</i> — Project S revealed! The Rimicanoe!

Elasmobranch diversity

May 26, 2010May 26, 2010 David Shiffman 4 Comments

Science

Three weeks ago, the South Carolina Department of Natural Resources COASTSPAN survey started it’s 2010 season. I was thrilled- it had been far too long since I was out on a boat catching sharks. The weather report looked good, and our scheduled sample site was only a few miles from where we set the DNR record for most sharks caught in a day (248). On paper, it looked like it was going to be a pretty good day. As it turned out, it was a great day. As we hauled in the first set of the first day of the season, something in the net caught my eye. Despite sampling in this exact location a dozen times before, despite years of working with sharks and two decades of loving sharks, we caught a species that I had never seen before. The smooth dogfish pup, only a few weeks old, made his species the fiftieth I have ever seen. In honor of this occasion, here is a brief excerpt from my upcoming shark conservation book, including pictures of me with some of the 50 species I’ve encountered. Enjoy!

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