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Entries in fisheries (6)

Monday
Jul262010

No ban for Southern New England lobstering

In an earlier post I mentioned a proposal to the Atlantic States Marine Fisheries Commission by its lobster science committee to ban lobstering in Southern New England (i.e. south of Cape Cod) for 5 years to allow the fishery to recover.  Not surprisingly, that proposal has been rejected.  An alternative motion proposing that the commission "consider" either a 75% cut in allowable landings, or a 50% cut, or no cut at all, was approved.  Well hey, thats a nice clear path forward now, isnt it?

These events continue to highlight the tremendous complexity and difficulty of successfully managing modern fisheries.  Its easy to blame the committee for being indecisive, but the truth is that when you're faced with making decisions about someone's livelihood, and they start using phrases like "The moratorium was the bullet in a gun that was pointed to our head," and "A poison pill has been put in front of us", then making decisions purely on the science isn't so easy.  This, then, is annoying to the scientists who work hard to provide the best evidence possible to help make good decisions, only to see their data dismissed or disregarded because of more anthropocentric considerations.  Throw in a healthy dose of regulatory red tape and the poor managers just can't win.

I guess its one of those situations where when everyone is miserable, you probably made the best decision, but it may well mean the slow death of a long-troubled fishery (no matter how rosy picture the fishers want to portray).  One day I expect to look back at this post and fondly remember when we had a lobster fishery south of Cape Cod.  On that day, the shifting baseline strikes again.

Wednesday
Jul072010

PS to the WS thread...

The Whale shark that I mentioned in yesterdays thread as having been caught in Pakistan was not claimed by the Sindh Wildlife Department (citing lack of funds) but was instead butchered and sold right off the beach.  The liver was sold for 800 Pakistani rupees and will be used to waterproof the hulls of fishing boats, and the rest of the carcass was sold for 500 rupees.

How much is that in US dollars?  $9.30 and $5.83, respectively...

Sunday
Jun132010

Zoiks! A 5 year ban on the Southern New England lobster fishery?

I've been part of research efforts on lobsters in southern New England on and off since 2002.  The fishery is in dire straights due to a range of problems like overfishing and infectious and metabolic diseases likely brought on by a changing climate.  But I was still surpsrised today by this article outlining a proposal to the Atlantic States Marine Fisheries Commission by its lobster science committee to suspend the lobster fishery south of Cape Cod for at least 5 years to allow it to recover from these recent dramas.

Quite honestly I can't see the proposal getting approved.  It would kill whats left of the existing fishery and I agree with the lobsterman quoted in the story that the infrastructure would simply go away (they could convert to trawling or dragging for scallops, but that ain't much of a fishery these days either).  Maybe that's what it needs.  Maybe it would never come back.  Maybe there IS no lobster fishery in SNE anymore.   I don't know, but it certainly speaks to the seriousness of the state the fishery has come to.

Thursday
May202010

12,081ft - The oceans, by the numbers

I was inspired by recent articles highlighting a revised calculation of the ocean’s average depth as 12,081ft, to consider the seas in a numerical light today. To that end, here’s a few random, sourced numbers and back-of-the-envelope calculations that might be food for thought:

0.87% = Amount we can see by diving from the surface (about 100ft) over the average depth
0.28% = Amount we can see by diving over the deepest part (Challenger Deep, Marianas Trench off the Philippines)
2.9 = Number of times deeper the deepest part is, compared to the average.
5,400 = Number of mammal species in the world
25,000 = Number of fish species in the world
Millions? = Number of marine invertebrates species in the world (no-one really knows)
2.3 Million = The number of US citizens directly dependent on ocean industries (source: NOAA)
$117 Billion = Value of ocean products and services to the US economy (yr 2000, source: NOAA)
50% = US population living in coastal zones
48% = The proportion of all human-produced CO2 absorbed by the oceans in the Industrial era (NatGeo)
0.1 = The pH drop in the surface oceans since 1900
0.35 = Expected pH drop by 2100 (source)
18 = The number of times more heat absorbed by the oceans than the atmosphere since 1950 (source - TAMU). Global warming is an ocean process far more than an atmospheric one.
3.5 Million = Estimated tons of plastic pollution circling in the Great Pacific Garbage Patch, and growing.

And yet:

30 = Number of times thicker the atmosphere is (out to the “edge of space” about 60 miles) than the average ocean. That would be the atmosphere that astronauts describe as a “thin veneer” on the planet…
0.06% = Thickness of the average ocean, compared to the radius of the earth. I think we can argue that the water is the veneer, not the air
$4.48 Billion = NOAA’s 2010 budget, including the National Ocean Service, Weather Service and Fisheries Services. (source NOAA)
$18.7 Billion = NASA’s 2010 budget, i.e. 4 times the size of the agency that looks after our own planet (source NASA)
$664 Billion = Department of Defense base budget 2010, not counting special allocations (source DoD)
0.6% = The amount you would need to cut Defense in order to double the NOAA budget

Some sources:
http://www.corporateservices.noaa.gov/~nbo/FY10_BlueBook/NOAAwide_One_Pager051109.pdf
http://www.corporateservices.noaa.gov/~nbo/10bluebook_highlights.html http://news.nationalgeographic.com/news/2004/07/0715_040715_oceancarbon_2.html  
http://oceanworld.tamu.edu/resources/oceanography-book/oceansandclimate.htm
http://web.archive.org/web/20080625100559/http://www.ipsl.jussieu.fr/~jomce/acidification/paper/Orr_OnlineNature04095.pdf  

Tuesday
Mar302010

CITES epic fail?

David Helvarg has a scathing OpEd piece in the Huffington Post yesterday, and rightfully so.  CITES, the Council for International Trade in Endangered Species recently failed to give proposed protections to the northern bluefin tuna and several species of threatened sharks, apparently caving to the desires of Japan and other nations with similar pro-harvest agendas.  I dont know how much data you need to be convinced that these populations are threatened to the point of collapse, but even if if there were equivocation on the science (and there's not), why not err on the side of safety?  Just as line calls in baseball go to the batter, decisions regarding endangerment should always go to the organism.

The way I see it, bluefin are stuck in a positive feedback loop of ever increasing commodity value, feeding more intense searching/fishing efforts, further reducing the population and thereby driving the value yet higher.  Its a trajectory that only ends one way, and it ain't a good one.

Oh, and if what Helvarg says is true about the Japanese embassy serving bluefin sashimi at a reception for the CITES delegates, then wow. Just, wow.  I sincerely hope those were artificially reared and not ranched or wild-caught...

Saturday
Mar272010

The ghost of fishers past

The folks you see out on their boats on the bay are not the only ones fishing; those who came before them still get a slice of the action, as this recent article about the retrieval of "ghost gear" from the Chesapeake Bay illustrates.  In many trap-based fishing industries, like lobsters and crabs, a significant number of traps are lost during the course of regular fishing efforts.  In addition, when a fishery turns bad, as happened in the Long Island Sound lobster fishery in 1999, some fishers cut their losses, and their marker floats, quit the fishery and just leave their gear where it is on the bottom of the bay.

The problem is, ghost gear like this keeps on fishing, long after the fisher has moved on to other endeavours.  The design of the trap continues to attract animals, even without bait, because the trap is basically a refuge or cave.  Those that enter are unable to leave and as they die they may act as bait to attract yet more animals to feed on their body.  In this way, the trap becomes a sort of "biomass black hole", sucking in animals from all around, for as long as the trap holds together.  Nets can ghost fish too, especially gillnets or any kind of trawl that can trap fish or strangle a reef

We used to trawl up ghost lobster gear all the time when I was working in Long Island Sound.  Indeed, few days on the water went by without snagging someone's old gear at some point, which speaks to the density of gear that's out there in some inshore waters.  I'm glad the fishers and the resource management agencies are working together to address the problem, because its one of those awful chronic out-of-sight, out-of-mind issues that can erode a fishery despite everyone's best efforts to manage things properly.  If you find ghost gear, call your local DEP or DEC, even the EPA, and let them know so they can come and retrieve it.

Picture of ghost gear on a coral reef from NOAA