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Conservation, Mekong Basin

Mekong fishes have found an unexpected ally in the Lao village of Donexay: Buddhist monks. FISHBIO has based part of our international conservation program in villages like this one on the Nam Kading River, a major tributary of the Mekong (see Outdoor classroom, Lao women in fish research). We recently interviewed the villagers about their local fish conservation area, a stretch of river closed to fishing, and discovered that the idea came from the head monk of the village’s Buddhist temple. He had seen the success of fish conservation areas during visits to other villages, and thought the river’s wild fish populations near Donexay could also use some protection from heavy fishing.

The village has even set up a tourist attraction on the grounds of the temple—a platform for visitors to feed the fish in the conservation area. It works something like this: visitors pay a suggested donation of 5,000 Lao kip, or about 60 U.S. cents, for a bottle of fish food, which the monks will use it to keep the feed in stock. Then they head to a platform on a steep bank overlooking the river and pour the fish food down a long pipe. The feed slides into the water far below, which suddenly springs to life with splashing and thrashing. An occasional fish leaps into the air amid the tumultuous food fight, and shadowy shapes of larger fish emerge in the murky water slightly further from shore. Villagers hope this opportunity to see and feed the fish will help people understand and support the fishing closure.

Sinsamout, our Lao FISHBIO biologist, took some underwater video of the feeding frenzy in the conservation area. When he showed the footage to the head of the village, some of the younger monks crowded around to catch a glimpse of the silvery fish (top photo). The villagers said that the involvement of the temple has made people more likely to respect the rules of the no-fishing zone. In fact, many historic marine protected areas and other conservation zones originated in traditional communities from sacred sites where hunting or fishing were taboo (Colding and Folke 2001). And Buddhism and biodiversity might not be so unrelated after all. The head monk compared feeding the wild fish to offering rice as alms to the monks, a common practice in Lao PDR. Both acts should give people the same good feeling, he said—a feeling of giving back.

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Conferences and Events, Conservation

The North American Congress for Conservation Biology (NACCB) was recently held in Oakland, with a closing reception at the Oakland Museum of California. The Congress was an opportunity for conservation researchers, professionals, and students to gather and discuss cutting-edge work to conserve the Earth’s biodiversity. The talks covered a wide range of taxa and conservation issues, including many presentations about how and whether conservation should be motivated by concepts such as “ecosystem services” which focus on the benefits of nature to humans rather than focusing on the inherent value of nature or rights for species to exist. The Oakland Museum of California and the Bay Area itself were fitting places to hold the events, as California’s economy is highly dependent on natural resources and yet the reason many people choose to live here is because of its natural beauty. The museum offers great exhibits which represent the historic and modern interplay between humans and ecosystems in California. Our fish, wildlife, water, forests, and minerals make the state rich in more ways than dollars can count, providing plenty of motivation to conserve ecosystem services and the inherent value of our biodiversity. The Society for Conservation Biology sponsors regional meetings like the NACCB, international meetings like the International Congress for Conservation Biology, founded the highly ranked journal Conservation Biology, and provides substantial resources for anyone interested in conservation at any level. There are regional sections and local chapters throughout the world, as well discipline-based groups, such as the Freshwater Working Group with plenty of opportunities for involvement.

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Conservation, Delta

freshwater asian clamAs flows receded in a Central Valley river, these Asian clams (Corbicula fluminea) became exposed along this gravel bar and were left to bake in the sun. The Asian clam is one of the most widespread non-native aquatic bivalve mollusks (e.g., “mussels” or “clams”) in North America. Non-native mollusks get a lot of attention because of there alien status, but native mollusks are largely underappreciated. In fact, North America has the greatest diversity of freshwater mussels in the world (approximately 290 species), but 72% are listed as recently extinct, endangered, threatened, or of special concern (Williams et al). Mussels are commonly considered biological monitors of water quality since they are sensitive to pollutants in rivers and lakes.

Perhaps the most interesting characteristic of freshwater mussels is their reliance on fish to complete their life-cycle. When adult mussels reproduce, the males release sperm into the water column and the females draw the sperm into their shell cavities to fertilize their eggs. The fertilized eggs develop into larvae, called glochidia, and then 75,000 to 3,000,000 glochidia per female are released into the water column. Once released, glochidia must attach to the gills or fins of an appropriate fish host to complete their metamorphosis into the juvenile stage. After anywhere between 1 to 25 weeks the juvenile mussel detaches from its host and falls to the substrate to complete its development into a sedentary, but free-living adult. Some mussel species may successfully use a variety of fish species, including salmonids, but the majority are thought to be host-specific. Without the right host fish mussels can’t complete their life cycle, therefore, they are dependent on the conservation of the host fish.

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Commercial Fishery, Conservation

msc certified seafoodWith our increased awareness of the impact we can have on the world, the drive for a sustainable future becomes even stronger. Over the past few decades there has been growing concern about the availability of natural resources and it is the consumer who is responsible for influencing the revolution. There is now an overwhelming demand for products that have been certified as sustainably harvested and fishing industries around world are feeling the pressure. The increased demand has resulted in many fisheries taking it upon themselves to become certified.

A wide range of different groups govern the way that ocean fisheries are managed and all are working toward the same goal of ensuring that the fish we consume are there for generations to come. Given these differing management approaches, it can be difficult to determine which standards are applied to which fisheries. The Marine Stewardship Council (MSC) is a group that has filled this gap by creating a standard for what they consider a “sustainable” fishery. MSC is a non-profit group that was started in 1996 by the World Wildlife Fund (WWF) and Unilever with the goal of changing the way fish are caught, marketed, and bought. Today there are 105 fisheries around the world that have been certified as sustainable to MSC standards, which include 56 different species such as sardines, lobster, swordfish and crab. The fisheries are both large, for example the certification of five species of Alaskan Salmon, and small, like the fishery for Lyrate hard clams in the Ben Tre Province of Vietnam. It is important to distinguish that this doesn’t mean that every sardine, lobster, swordfish, or crab caught has been certified sustainable. If you want to be certain you are purchasing something MSC certified, it is your responsibility to make sure that the fish you buy has the label.

In order to obtain a sustainable fishery label from the MSC the fishery must first pass a rigorous seven-step assessment conducted by a qualified certifier. The average time that it takes to conduct the assessment is 18 months, but it can vary based on how much information is already available on the fish stocks and how much more research is needed to conduct a proper study for determining if the fishery is sustainable. A pre-assessment can help inform the fishery regarding how close they are to meeting the standards and to identify any potential issues with the fishery performance before jumping into a full-scale assessment. The three main principles that are assessed by the MSC for determining certification are;

  1. the fishery’s ability to maintain a sustainable fish population,
  2. whether or not the fishery is damaging the ecosystem in which it depends on,
  3. and that it is managed in a way that complies with all local, national, and international laws.

Once the fishery meets the MSC standards, the certificate of sustainability will be valid for five years, as long as the fishery continues to pass a yearly review to verify that it is meeting the standards. At the end of the five-year period, another full assessment of the fishery will be conducted.

In 16 years our cultural awareness of the adverse effects we have had on world fisheries, and the collective efforts made by the Marine Stewardship Council and other similar sustainable seafood organizations, have significantly influenced the way the fisheries are managed today. As of 2011, roughly 6% of all wild caught seafood has been certified by MSC’s standard and with your help that number could continue to rise. If society makes a collective effort to buy sustainable seafood then the world’s fisheries will continue to see the benefits and make the efforts to move towards sustainable fishing.

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Conferences and Events, Conservation

The Freshwater Fish Specialist Group (FFSG) of the World Conservation Union (IUCN) Species Survival Commission has just held its annual meeting in Chester, UK. With diverse attendance, the meeting was a great opportunity to learn about efforts to conserve freshwater fish, from Africa to Australia, and many regions in between. The Mekong was also represented, as FISHBIO’s Conservation Director gave a talk on our work to establish the Mekong Fish Monitoring Network. With generous support from the Chester Zoo, the meeting was a chance to connect with other researchers, learn about different conservation approaches, and devise plans for future initiatives of the FFSG. One of the new goals of the group is to collate metadata for long-term data sets on freshwater fish into one searchable database. So if anyone out there would like to contribute to this effort just drop us a line. Such a resource would be extremely useful for students, researchers, anglers, and resource managers around the world. Historic data can help us to understand how fish populations have changed over time, recognizing that yesteryear’s “status quo” may seem like a myth to us today. In the historic British city of Chester, many things have changed, yet the past was visible all around us. Chester was established over 2,000 years ago, and is home to one of the oldest Roman walls in Britain, which still encircles the city center. In the midst of efforts to understand where we are today, it’s important to remember where we’ve been, recognizing shifting baselines.

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Conferences and Events, Conservation, Mekong Basin

FISHBIO and the U.S. Geological Survey (USGS) with support from the U.S. State Department recently hosted a workshop in Phnom Penh, Cambodia. Gathering representatives from government, universities, and non-governmental organizations (NGOs) of member nations of the Mekong River Commission (Cambodia, Lao PDR, Thailand and Viet Nam), we discussed a proposed Mekong Fish Monitoring Network. The concept was born from a frequently cited need for researchers in the Lower Mekong Basin (LMB) to share their knowledge of Mekong River fish with other scientists and decision-makers. A network of researchers collecting comparable data would provide a better understanding of how LMB fish populations may respond to future environmental changes and increase the scientific capacity of local researchers and institutions to assess resources for themselves. This network could be a valuable forum for researchers to exchange ideas, house data, or access general information regarding fisheries studies in the LMB region.

The goals of the workshop were to determine if the proposed network and associated databases were of interest and value to LMB nations, to determine if future fisheries monitoring could be used to collect comparable data within each nation, and to establish methods and an organizational structure for working together on future monitoring and research. The workshop began with presentations by USGS researchers demonstrating examples of web-accessible databases, data analyses, and visualizations for consideration to support the proposed monitoring network. Representatives from each country followed, and described current and future monitoring and research activities. For the remainder of the two-day workshop the group was divided into smaller group sessions to discuss essential issues including: what are the most important fisheries questions that you are interested in answering, and what resources would be needed (e.g., equipment, personnel and/or training) in order for your organization to participate in a network? All regional participants agreed this Network tool would be very useful, yet also voiced concerns about their ability to contribute given limited resources. For these reasons, we feel that activating the network and finding the funding to support it are vital goals for the Mekong Basin.

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Conferences and Events, Conservation

The Society for Conservation Biology (SCB) has just hosted its 25th International Congress for Conservation Biology with over 1300 global attendees converging in Auckland, New Zealand. FISHBIO is very grateful to the local organizing committee and the Society for another fabulous Congress, hosted with great Kiwi style.  Researchers, practitioners, and students from around the world shared their work and exchanged ideas. The Mekong Basin made a few appearances, along with Sakhalin Island in Russia (the home of a previous FISHBIO intern). Getting involved in SCB can connect you with a global community of conservationists, and FISHBIO is working to get more freshwater specialists engaged. We encourage you to visit www.conbio.org and learn more, or just drop us a line and we can help you find your niche.

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Conservation, Miscellaneous

With a small crew, we successfully planted native seedlings at our restoration site along the Stanislaus River (see Brute Force! and Fill ‘er Up). Planting native trees on this weed dominated riverbank is a small component of a much larger project. The bulk of the project will involve grading down an in-stream island, a remnant of the large-scale gold dredging era, to remove the steeply sloped banks and create floodplain for salmon and steelhead rearing habitat, as well as relocating gravel to create some additional spawning habitat. The in-channel work was scheduled to take place this summer however, due to unusually high river flow, it was not possible to operate heavy equipment in the river this year. Instead, this year we have focused on removing non-native invasive plants such as tree-of-heaven (Ailanthus altissima), Himalayan blackberry (Rubus discolor), and Arundo donax and replacing them with native riparian vegetation. Although the objective of the project is to increase spawning and rearing habitat for salmon and steelhead, maintaining a good riparian zone is beneficial in many ways. An adequate riparian buffer will shade the river and keep the water cool, stabilize the bank to prevent erosion, filter nutrients and sediments to maintain high water quality, provide wood for instream structure, and provide habitat for the insects that salmonids feed on.

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Conservation, Miscellaneous

We’ve done a fair amount of carrying buckets of water over the years, so we decided to go big in order to keep our native plantings watered. You may know, from our last post (Brute Force!), that the ground at our restoration site on the Stanislaus River has been prepared for planting native trees and shrubs. Once the seedlings are planted, it is critical to keep them well-watered for the first few years while their roots get established. To accomplish a regular watering regime we have installed a 2,500-gallon water tank on site and plumbed it with a drip irrigation system. The tank can then be filled weekly by drawing river water with a gas powered water pump so that water can be gradually delivered by the drip system right to the plants’ root zone, where it is most needed. With the irrigation system complete, the plants are ready to be transplanted to their new locale…

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Conservation, Miscellaneous

Sometimes conservation biology requires brute force… FISHBIO biologists and technicians are hard at work preparing planting holes for native riparian trees and shrubs. As part of a floodplain enhancement project along the Stanislaus River we are removing non-native invasive vegetation and replacing it with native species like elderberry (Sambucus nigra), sandbar willow, Freemont cottonwood (Populus freemontii), white alder (Alnus rhombifolia), Oregon ash (Fraxinus latifolia) and California blackberry (Rubus ursinus). The goals of this project are to enhance the riparian areas and convert the surrounding fallow areas to a more natural state to provide habitat for riparian dependent species. Restoration will reduce forest fragmentation, increase vegetative cover, and create other benefits for terrestrial species within a relatively short time period. For months, cuttings and seedling have been cared for in preparation for planting this fall. Crews have fenced off the restoration area to prevent damage to the new plants and holes prepared for planting. Although the restoration area is adjacent to a river, irrigation will be critical for the first few years while the trees become established. There will be more to come on the challenges of keeping these plants irrigated, healthy and growing.