Thriving Oceans

Just a couple of recent fish/conservation related postings from JournOwl.com that I thought I would pass along…

The incredible shrinking reef fish

They say a picture is worth a thousand words and in the case of Loren McClenachan’s June 2009 publication in The Journal of the Society for Conservation Biology there is evidence of a major decline in the size of fish caught in the Florida Keys.  McClenachan used a unique method for quantitating the changes of reef fish size over the last 50 years by turning to photographic evidence and documented data of harvested trophy fish.

Read the post

Sea-cage pathogen factory: Salmon and Sea Lice

But the documentary is just a springboard into the real nuts and bolts of the fish farming issue that definitely has a marketable appeal to businessmen and everyday people concerned about overfishing alike.  Unfortunately the aquaculture solution has unintentional consequences including a decline in wild fish populations, perhaps to near extinction, in areas with high concentrations of fish farms.

According to Neil Frazer, Sea-Cage Aquaculture, Sea Lice, and Declines of Wild Fish, “The difference is that sea cages protect farm fish from the usual pathogen-control mechanisms of nature, such as predators, but not from the pathogens themselves. A sea cage thus becomes an unintended pathogen factory.”

Read the post

The California Department of Water Resources is experimenting with a new way to save salmon in the delta.  “Preliminary results show that an experimental, non-physical fish barrier is working to help keep young Chinook salmon and steelhead in a more direct path to the ocean and away from agricultural diversion and the state and federal pumping plants. The bubble curtain barrier project combines acoustics and a strobe-lit sheet of bubbles to create an underwater wall of light and sound at frequencies that repel juvenile Chinook salmon.”

Check out the video…

I came across an interview conducted by mongabay.com on marine scientist Jennifer Jacquet’s (Guilty Planet) call for some individuals to refrain from eating seafood.  It is definitely worth a read.

“I do not believe that all people should give up eating seafood. But I believe that people for whom seafood is a luxury product should consider abstaining, particularly if it is not too much of a sacrifice,” Jacquet said. “I certainly believe there should be a conservation group out there advocating this position, too, because fish need a wider spectrum of voices. Currently, almost every campaign relates to fish and invertebrates as commodities rather than wildlife.”  Mongabay.com, 2009

Considering my wife and I, for all practical purposes, have given up seafood after a longtime bout of a ban on shrimp, I wanted to expand on the comment I left on ‘A Call to Give Up Seafood.’

Fish need an animated icon akin to the panda bear that will evoke an emotional response and drive conservation efforts.  By showcasing the plight of such public-friendly creatures like birds  and whales (as you indicated), organizations and conservation efforts can also work to protect lesser known species.  With this in mind I completely agree that campaigns must equate fish/invertebrates  to wildlife as opposed to mere commodities.

Unfortunately, I have found many individuals to either be unaware of the overfishing crisis, lazy in making a concerted effort to make safe seafood choices, or simply indifferent because seafood continues to fill restaurant menus, grocery store shelves, and fish markets.

(And those who do want to be responsible are often misled by some farmed species that are eco-unfriendly.)

Perhaps it is the lack of marketable ‘spokesfish’ that has driven campaigns towards referring to fish/invertebrates as commodities. Hence, the hope is that appealing to the pocketbook of individuals, communities and commercial fisheries operations will promote long-term sustainability. But the battle still rages as fish, crabs, and a host of other species are drawn from the oceans in an attempt to quell a population’s daily appetite.
Fish and invertebrates are wildlife indeed.  Considering they draw millions of people to reefs and aquariums each year there is obviously a love of fish, but maybe it is the respect they lack.  I am a fish lover. I love to watch them forage for food, I love to watch them in shoals, I love to watch them school, I simply love to watch them interact with the environment and I find nothing better than floating in the current over a reef observing ocean WILDLIFE.  Tranquility at its best…just ask any aquarist (responsible fish keeping please!), snorkeler, and diver.  And I give them the utmost respect. 

Obviously I am not alone, but the vastness of our oceans and the continued stocking of seafood has given rise to the general population’s false sense of security that fish always have and always will be available.  Because of that it has become second nature not to give the origin of seafood a second thought.

So, does anyone have a ‘spokesfish’ in mind to expand the call for sustainable fishing practices and appeal to the masses?

Happy WORLD OCEAN DAY 2009!  The United Nations has officially declared June 8th as World Ocean Day and declared it as an “opportunity to raise global awareness of the current challenges faced by the international community in connection with the oceans.”

“The oceans are essential to food security and the health and survival of all life, power our climate and are a critical part of the biosphere.”

So what do our oceans do for us…watch this NatGeo video:

Intertwined amongst the scientific publications in latest Journal of the Society for Conservation Biology is an essay harboring questions aimed at current environmental themes such as species management , climate change, and terrestrial ecosystems. The idea behind the essay, One Hundred Questions of Importance to the Conservation of Global Biological Diversity, is to evoke thoughts that will ultimately drive solutions for conservation practice and policy…in short protect biodiversity in the long-term.

And of the 100 most critical questions, 8 were organized under the section of Marine Ecosystem and are as follow:

• How will ocean acidification affect marine biodiversity and ecosystem function, and what measures could mitigate these effects?
• What are the ecological, social, and economic impacts resulting from the expansion of freshwater and marine aquaculture?
• Which management actions are most effective for ensuring the long-term survival of coral reefs in response to the combined impacts of climate change and other existing stressors?
• Which management approaches to fisheries are most effective at mitigating the impacts of fish extraction and fishing gear on nontarget species and their habitats?
• How does the effectiveness of marine protected areas vary with biological, physical, and social factors and with connectivity to other protected areas?
• What will be the impacts of climate change on phytoplankton and oceanic productivity, and what will be the feedbacks of these impacts on the climate?
• How will multiple stressors, especially fishing, pollution, sea temperature fluctuations, acidification, and diseases, interact to affect marine ecosystems?
• Which mechanisms are most effective at conserving biodiversity in ocean areas occurring outside the legal jurisdiction of any single country?

I anticipated an addressing of bycatch, climate change, and overfishing, but what I found most intriguing is the all encompassing question of the affect of multiple stressors on marine ecosystems.  This is akin to the model for the theory of everything as such an answer is the universal question.  The marine ecosystems are not defined by a single species or environmental threat, but are an interconnected world in which pollution, overfishing, bycatch, and declining biodiversity culminate in a determination of the state of our oceans.   The more stressors we continue to add to the list, the more difficulty we will have in maintaining healthy oceans.