Thriving Oceans

As the weekend rolled to an end and the inevitable Monday workday loom overhead, I moseyed on to the bedroom and turned on the radio. Expecting to encounter a little paranormal lullaby, I was incredibly surprised to find the guest host of Coast To Coast AM, George Knapp, tackling the overfishing crisis.  In his interviews with Rupert Murray (The End of the Line) and Rick Moonen (RM Seafood), George brought this important topic of conservation concern to an international audience.  Since Coast to Coast AM is broadcast on over 500 United States affiliates alone, I was elated  to hear the notion of sustainable seafood practices being promoted to millions and perhaps recruiting some listeners to ultimately make informed and responsible meal decisions.

 And sprinkled throughout their conversations was a discussion, or warning if you will, about a vanishing act recently perpetrated by Alaskan King salmon.  Well, after a little online digging I managed to come up with an AP report (Aug. 2, 2009) on CBS News describing the failure of king salmon to return to a number of Alaskan rivers…again.

“One Alaska river after another has been closed to king fishing this summer because significant numbers of fish failed to return to spawn. The dismally weak return follows weak runs last summer and poor runs in 2007, which also resulted in emergency fishing closures.” AP

And as the salmon continue to vanish from our waters year after year, we are left speculating whether the problem is ocean currents, food availability, bycatch, aquaculture, or overfishing.  Yet over the last decade, ” the incidental number of king salmon caught has skyrocketed, reaching over 120,000 kings in 2007.” AP

Hmmm!  Perhaps a connection?  Instead of embarking on another version of the blame game and debating whether (or to what degree) the lack of salmon returns is caused by natural phenomena, such as changing ocean currents, river conditions or available prey, or human activities, we need to institute a little fisheries management tough love. 

For in the end bycatch may not be the only culprit, but as opposed to the actions of Mother Nature, it is the factor that we can definitely control.  And of the 120,000 kings killed in pollock trawl nets in 2007, an estimated 78,000 adults would have returned to the rivers of western Alaska.

AP Article: King Salmon Failing to Return to Spawn

An eternity, perhaps not quite, but that’s my perception of time when thinking back to my Hawaiian excursion in mid-June.  And finishing up a home movie chronicling our adventure, complete with contemporary Island music from the likes IZ for instance, just gets me in the mood for some white sandy beaches and clear salty waters.  So why not share a few things I came across while swimming over the reefs of Maui.

Obviously such a post lends itself infinity as the amount of pictures and video I have is substantial… notice I did not mention anything about quality.  But with that said, using a digital underwater camera is  a goldmine for someone who needs to cull through the blurs to find a few gems. 

Of course I need to start the ball rolling with a Hawaiian green sea turtle.  It is by far my wife’s favorite marine creature and I am always left in awe at the range of colors found on their carapace.  By the way, did you see our Hawaiian green sea turtle video footage?  And even in today’s world of rampant conservation information,  I was left in shock to discover people clamoring to touch and harass this amazing species (And yes members of our party spoke up immediately to inform the culprits and end their activities). I guess that’s why we need to continue spreading the word.

Hawaiian Green Sea Turtle

A juvenile yellowtail coris (Coris gaimard), which is the first one I have run across in Hawaii

A raccoon butterflyfish (Chaetodon lunula)

A Slate or Red pencil urchin (Heterocentrotus mammillatus) and a black sea urchin (Echinothrix diadema)

A cushion seastar (Culcita novaeguineae)

Whitemouth moray eel (Gymnothorax meleagris)

An Arc-eye hawkfish (Paracirrhites arcatus)

The Hawaiian Day Octopus (Octopus cyanea) and a female bird wrasse (Gomphosus varius)

In a previous incarnation of Thrivingoceans.org, I used to have a list of favorite quotes that was almost completely comprised of excerpts from the movie Jaws.  And after all the years of watching the flick I am still not exactly sure how my wife truly feels about the film, but she does seem to tolerate the viewings.  Perhaps I’ll ask her tonight.

At any rate, I came across this great video from Save Our Seas and I wanted to pass it along, not only for the familiar movie appeal, but for its ultimate message.  Don’t be alarmed as it may contradict what is typically heard on the evening news and cable news networks.

“You’re gonna need a bigger boat.”
Chief Martin Brody (Jaws)

As the fisheries war continues to rage amongst conservationists, commercial entities, and international politics, it is always good news when a species in peril gets what perhaps can be called a break. Just a few months back the IUCN reported, “The global conservation status of 64 species of open ocean (pelagic) sharks and rays reveals that 32 percent are threatened with extinction, primarily due to overfishing.”

And can we honestly be surprised at the findings when we have all seen the photos displaying mounds of confiscated shark fins not unlike the old west pictures showcasing a day’s work hunting bison?  But, it is not only pelagic species that are feeling the pressure of overfishing as the small coastal blacknose shark is on an unsustainable road towards collapse.

A recreationally and commercially harvested fish, the blacknose shark was hauled from the ocean at a rate of over 27,000 individuals (62 metric tons without head, guts, fins) per year from 1999-2005.  Because they bear few young and were unable to cope with previous fishing pressures, NOAA is proposing a change in the status quo of lumping blacknose sharks in with other coastal shark quotas and effectively reducing their loss by 78%.  Thus, blacknose sharks would be separated from the general coastal shark quota, and under the proposal the annual quota would fall to 6,065 individuals or 14.9 metric tons.  Additionally, the shark would only be available for landing by commercial fishermen with directed permits.

“To help rebuild the blacknose population, NOAA’s Fisheries Service is also proposing to prohibit the landing of all Atlantic sharks with gillnet gear—the primary way blacknose sharks are caught—from South Carolina south, including the Gulf of Mexico and the Caribbean Sea.”

“Because they are frequently caught with other small coastal sharks, there is also a proposed annual quota for the non-blacknose small coastal sharks, including finetooth, Atlantic sharpnose, and bonnethead sharks.  The proposed quota would be significantly reduced from the current 454 metric tons dressed weight quota to 56.9 metric tons dressed weight. The proposed quotas for blacknose and the non-blacknose small coastal sharks represent an overall 76 percent reduction in landings by weight of small coastal sharks.”  (NOAA, July 24, 2009)

Last Saturday my wife and I made the 2 hour journey to the Monterey Bay Aquarium, which marks our first visit in about 4 years.  As with each and every time before, I left wondering why it took me so long to get back, and most importantly how can I swing a personal 28 foot tall kelp forest aquarium…OK I admit I’m a fish lover.  But the show was not only within the confines of the plexiglass walls as the wildlife visible from the outside amphitheatre at the Great Tide Pool was amazing.

In the distance wrapped in kelp were approximately 9 sea otters. Kayaks would approach (all at a distance to prevent disturbance) and then wander away after a few minutes of enjoying the view.  Throw in a couple harbor seals, cormorants, murres, and sea lions and the bay becomes a picturesque wildlife refuge. 

Interestingly enough though, on June 30th the U.S. Geological Survey reported a 3.8% drop in sea otter numbers during the 2009 census.  A decrease of 106 individuals may not seem like a terribly large decline overall, but it keeps them below the criteria needed to remove them from the Endangered Species Act (the 3-year running averages would have to exceed 3,090 for 3 continuous years), it represents a population growth plateau for the last three years, and according to Dr. Tim Tinker of the USGS,

“This year’s census results demonstrate that sea otters continue to experience levels of mortality sufficient to limit their recovery. This highlights the need for continued efforts to understand and mitigate threats to sea otters and other species in the nearshore ecosystem.”

A more in depth examination into the cause of the declining sea otter population trend was sought out by the San Francisco Chronicle.  In a July 1st article, it was reported that deceased otters have been testing positive for bacteria, viruses, and parasites often associated with sewage, urban, and farm runoff.  Thus, are we witnessing the first signs of a pollution problem along the California coast?

And what about overfishing?  Well an inadequate amount of available favored invertebrates may be limiting nutritional intake, resulting in otters that are more susceptible to diseases and preventing the population from reaching a healthy status.

Although there are currently more questions than answers, it would not be surprising to find that the southern sea otter of California is being hindered by a combination of multiple factors.

**USGS: To reduce the influence of anomalously high or low counts during any particular year, three-year running averages of the survey results are also used to assess whether the population is growing or declining. Factors that can influence the count include viewing conditions, abundance and species composition of surface canopy kelp, observer experience, and distribution and movements of the animals.

A little notoriety can’t hurt anyone as everyone strives for their 15 minutes of fame, right? On the other hand, Undaria pinnatifida is rather on the infamous side as its picture is filling wanted posters and putting ecologists on alert.  Already appearing on the IUCN’s 100 of the World’s Worst Invasive Alien Species and considered in the top 10 invasive seaweeds, Undaria has established itself somewhat locally to my home front in San Francisco. 

The kelp (Undaria pinnatifida) is native to Japan where it is cultivated for human consumption. It is an opportunistic weed which spreads mainly by fouling ship hulls. It forms dense underwater forests, resulting in competition for light and space which may lead to the exclusion or displacement of native plant and animal species (Global Invasive Species Database).

As with many other invasive marine species, this exotic kelp is believed to have hitched a ride on ships, which has allowed it to establish itself from Southern California to Monterey.  According to a San Francisco Chronicle piece, “…the U.S. infestation, only on the Pacific Coast, had stopped its northern march at Monterey’s harbor. Crews pulled it out from the Monterey harbor every month for six years until funds ran out last year.”

Perhaps the recent migration and sightings in San Francisco marinas is a direct result of halting of the Undaria culling program in Monterey.  As funds dried up to remove the invasive kelp from the marinas, it was allowed to grow unchecked while simultaneously releasing millions of spores. Plus, boats traveling from Monterey marinas to San Francisco marinas could potentially be a mode of transportation.

Additional theories include: harbors that are less polluted, boat paints that include fewer pesticides, and faster ocean going commercial vessels.

S.F. Chronicle: Kelp among top 10 invasive seaweeds hits S.F.