In the 16th century, when the Portuguese sailed to the Arabian shores, they were enamoured by the plentiful, fresh seafood available along Oman’s 3,000 km coastline. Today, the sultanate of Oman is looking to revive this historic industry to reduce its dependence on the declining oil sector. “Fish farming has an untapped potential due to Oman’s geographical location. Agriculture and Fisheries is the second largest industry, therefore, it is natural that the government considered investing in it to decrease the reliance on oil and gas”, says Rumaitha Al Busaidi, an Omani environmentalist. The idea is sound, but its implementation has so far been marred by the lack of advanced technological implementations in Omani fisheries. Farmers still rely on the indigenous Falaj irrigation system, developed in 500 AD and used till date, which carries water from the natural springs to the mountain villages for farming and aquaculture. While it might have worked in the past, today this is problematic.

“Our fish production quality suffers because the water used for fish production and farming gets mixed with the saline water from the ocean, dramatically decreasing our income”, complains Khalifa Al Sahabi, a fish farmer in Bidiyah town in the Sharqiyah region.

To address this issue, Al Busaidi has introduced the concept of integrated Recirculating Aquaculture Systems (RAS) in aquaculture farms. These use mechanical and biological filters to reuse the water in production and minimise water resources for organic aquatic farming. “RAS technology also protects the marine environment”, she explains, “by restricting the effluent that reaches the ocean.” The Oman government had implemented this technology initially for the production of Tiger prawns. Food lovers and industry experts laud their size and quality. RAS technology has helped in increasing the production rate of these prawns even as it has made intensive fish production compatible with environmental sustainability. In May 2021, Oman invested in the construction of a 8,000 hectare aquaculture farm: the second largest in the MENA (Middle East and North Africa) region.

A number of barriers had to be overcome for the RAS technology to be implemented. Costs of installing temperature controls in the desert kingdom are high and it has been tricky to persuade local farmers to choose this newer technology over their traditional aquaculture methods. It has taken extensive educational drives by the Omani government to finally develop 21 integrated tilapia farms, one shrimp farm, and one marine cage farm in the country. Today, the figures speak for themselves. The production of tilapia has leapt from three tonnes in 2013 and five in 2014 to 20 tonnes in 2015 and 77 tonnes in 2017.

“With the help of RAS, we have successfully enhanced the fish quality by 66 percent across the country in the last six years”, says Nasser Abdullah, Assistant Project Manager of the Al-Wusta fish farming project. Next on the cards: using RAS technology for salmon production. While energy intensive, this sustainable aquaculture model is ensuring safer fishing techniques and lowered food miles for fish consumers across the Middle East.

Author: Rahma Khan, The India Story Agency for Sacred Groves
Images Credit: Oman banner image – Richard Bartz/ Wikimedia Commons, Muscat fish markets – StellarD and Khalifa Al Sahabi
(Wikimedia License – https://creativecommons.org/licenses/by-sa/4.0/legalcode)

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Sixty miles south of Montreal, near the United States-Canada border, Missisquoi National Wildlife Refuge is one of the most pristine wetland ecosystems in the Candian Northeast. An important wintering area for white-tailed deer, this network of woodland bogs and glassy lakes is a refuge for endangered birds, including swooping great blue heron and the charismatic red-billed wood ducks that are nicknamed ‘acorn ducks’ for their preferred fall food.

So scientists from the U.S. Fish and Wildlife Service and the US Geological Survey were surprised when a 2016 study found that the region’s wetlands were also home to an abundance of fish with bizarre abnormalities.
“An astonishing 60 to 100 percent of all the male smallmouth bass we examined had female egg cells growing in their testes,” says the study’s lead author, Luke Iwanowicz. The problem, they knew, was a little white pill.

Invented in the 1950s and introduced to the mass market in the 1960s, the contraceptive pill was revolutionary for humans: freeing women from a physically gruelling cycle of pregnancies as it gave couples control over family size.

For freshwater fish species, the result of this contraceptive revolution has been less rosy. By the early 2000s, it had become clear that the synthetic oestrogens in the pill, excreted by humans, were making their way into water systems and disrupting fish populations’ fragile endocrine balance.

“We identified that some individual fish in fish populations were being affected by a range of compounds going in the environment that can mimic and/or disrupt oestrogen signalling in fish,” says Charles Tyler, Professor of Ecotoxicology and Environmental Biology at the University of Exeter, who has researched the effects of oestrogenic pills on marine life in the UK.

The main offender is ethinylestradiol (EE2), the synthetic oestrogen found in contraceptives. Designed to be resistant to degradation and inactivation, EE2 is more stable in the human body than naturally occurring oestrogen. When excreted into our water supplies by humans, however, EE2 can make its way into aquatic habitats, causing an intersex condition in which male fish display female traits like carrying eggs in their testes; rendering the population infertile. The effects, studies including the Missisquoi study have found, is transgenerational, disrupting the reproductive capacity of fish populations for many life cycles.

What was needed was a solution that preserved the social benefits of pharmaceutical contraception as it enabled marine species to thrive. Mithra, a Belgian biotech company that specialises in novel reproductive pharmacology, came up with one answer: Estelle, a contraceptive pill based on natural oestrogen, estetrol (E4), a unique human hormone produced by the fetal liver early during pregnancy. It forms the basis of their new Estelle contraceptive pill.

Dr. Graham Dixon, Chief Scientific Officer of Mithra Women’s Health, argued in a statement heralding the launch of the new pill that it would be a ‘game-changer’: “E4 is significantly more environmentally friendly compared to alternatives currently on the market, does not accumulate in living organisms and dissipates rapidly from water and sediment.”

Mithra’s own research has found that E4 incurred no adverse effects on aquatic egg production, testicular growth or fish reproduction and that only 2.5 percent of released E4 was biologically active.

Any beneficial effects on aquatic populations will, of course, require broader uptake of the new drug, however in May 2021, the European Commission announced that the pill had been approved, and it will be commercially launched during the second half of the year in Germany, Poland and Austria. A rollout is already commencing in the US from the end of June.

Looking ahead, Tyler says, there are reasons to be hopeful about the prospects for freshwater fish: “There’s a move towards more eco-pharmaco vigilance,” he says. “Looking for drugs which are less harmful to the environment.” He adds that the world has a ‘moral and social responsibility’ to make these drugs accessible to everyone.

Author: Sally Howard and George Walker, The India Story Agency for Sacred Groves
Images Credit: Charles Tyler, Missisquoi National Wildlife Refuge and Unsplash

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One of Australia’s great forests once grew hidden from sight off the east coast of Tasmania. Swathes of giant kelp, known as kelp forests, grew from the ocean floor, towering 30 to 40 metres into massive floating canopies across the surface of the sea. “They were charismatic, six to seven storey tall underwater jungles, basically,” says Cayne Layton, postdoctoral research fellow at Tasmania’s Institute for Marine and Antarctic Studies. “It is said that some floating canopies were so thick that they were on navigation charts as a navigational hazard.”

Today, 95 percent of this globally significant forest of the world’s fastest-growing plant – giant kelp can grow up to 50 centimetres a day – has been wiped out by the inexorable shift of the warm East Australian Current – the ocean current made famous in the movie Finding Nemo – displacing the cold, nutrient-rich Southern Ocean waters. The remaining five percent now grow only in scattered patches. The decline of these forests, listed as Australia’s first endangered marine community, has been relentless since the 1940s, largely unnoticed and unremarked by the local community. But the fightback has begun, and the early results are promising.

In the spring of 2020, Layton and a team of scientists planted three restoration plots of kelp on rocky reefs along Tasmania’s east coast, having collected spores from surviving giant kelp plants identified as tolerant to the warmer seas.

The scientists planted tens of thousands of millimetre long juvenile kelp on the reefs. When they returned months later, at the end of summer, they were greeted by a beautiful sight.

“One of the sites had no survivors, but at the two other sites we had really good success,” Layton says. “At those two now, we have over 200 surviving giant kelp. The average size is about a metre, and the largest is over four metres tall, so they’re kind of like stringy teenagers at the moment.

“The really exciting thing for us is that in those first assessments after summer, the kelp looked really healthy. That was encouraging – that the increased thermal tolerance we found in the lab was translated to the field.”

The team will again plant giant kelp this winter, and hope to do so each year into the future.

The rehabilitation of these underwater forests has been touted as a tool in the quest to mitigate climate change – great forests that absorb great quantities of carbon – though Layton cautions that the science is still young when it comes to giant kelp’s carbon sequestration ability. Such efforts, along with regrowing seagrasses, are central to marine protection as the climate warms.

Their value to the planet and marine communities, however, is unquestionable. And moment by moment, these fast-growing marine marvels are now straining once more towards the sun and perhaps even a return one day to navigation charts.

“We’re very happy (with the planting), but it’s still early days,” Layton says. “We want these individuals to grow up and become mature and start producing their own babies. Restoration is never going to work if it’s reliant on me and my colleagues planting these kelp. We’ve got to kickstart the natural cycle, so those individuals that we plant start producing their own juveniles.

“They can reach reproductive age within a year, so we’re hoping that towards the end of this year the largest ones will start to become reproductive. That’ll be the next big exciting step for us.”

Author: Andrew Bain, The India Story Agency for Sacred Groves
Images Credit: Cayne Layton, Masayuki Tatsumi

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With its brilliant blue waters, the Adriatic Sea – the body of water separating the Italian peninsula from the Balkans – is a firm favourite with European holiday makers. Its shallow depth and species diversity also provide for a rich commercial fishing ground, with over 1,000 bottom-trawling vessels fishing its seas in a given week, chiefly Italian and Croatian commercial fleets in pursuit of bass, bream and mackerel.

The seafloor nets used by these trawlers are, sadly, a problem for non-commercial species too: dolphins, sharks and the sea turtles that flock to the Adriatic to feed on jellyfish and squid. Fishing trawlers inadvertently capture 6,500 sea turtles a year in the Adriatic, a phenomenon termed ‘bycatch’ or ‘wasted sea life’; over 2,000 of these turtles, it is estimated, will die.

“Bycatch is a very real problem that requires urgent attention and action,” says Lucy Babey, Deputy Director of marine charity ORCA. “Each year hundreds of thousands of turtles, sea mammals, and millions of sharks are incidentally caught and killed in fishing gear around the world.”

Sea turtle mortalities are caused by drowning, as individuals are ensnared and dragged underwater in trawlers’ nets; disorientated turtles find it difficult to change their swimming direction in order to escape through the net’s mouth.

Enter the TED, or Turtle Excluder Device, a structure fitted to the top or bottom of the trawl net that allows larger species to escape. The first TEDs, simple metal grids, were developed in the 1960s in the U.S., where green, leatherback and loggerhead turtles were routinely caught in the nets used by deep-sea shrimp trawlers. European commercial fishing fleets have, however, resisted the wholesale application of TEDs, in the belief the devices exclude larger commercial species, such as cod, as they reduce catch quality due to crushing against the grid. Traditional designs also become clogged with debris, meaning the TED can no longer either catch fish effectively or exclude turtles.

Now a new-generation ‘flexible TED’ is being pioneered in the Adriatic. Mounted on the rearmost part of the trawling net, a tubular potion known as the ‘codend’, the device, designed by marine experts at The Italian National Research Council (CNR), is a tilted escape hatch that acts like a valve, opening when it is hit by a larger weight, such as a turtle or dolphin. Additionally, the net is fitted with an accelerator funnel, to drive the fish down and away from the exit, protecting the quality of the catch.

In a 2019 pilot, CNR’s flexible TED prevented the capture of sea turtles as it affected neither the weight nor composition of the commercial catch and reduced debris capture.

The adoption of the device, says Claudio Vasapollo, a marine biologist involved in the research, “could avoid the bycatch of more than 8,000 sea turtles a year in the Adriatic Sea”. “Although,” he continues, “any solution will need to get the fishing industry on board”.
“It is a matter of urgency that governments invest in, and legislate for, effective bycatch solutions for larger species such as dolphins and turtles,” ORCA’s Lucy Babey adds, of the new-generation TEDs. “These animals play crucial roles within their ecosystem, which are at risk of collapse without them.”

Author: Sally Howard, The India Story Agency for Sacred Groves
Images Credit: Turtle banner image and 3. Zdeněk Macháček & Kris Mikael Krister, 1. David Clode, 2. CNR

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Apart from coastal bathers who’ve gingerly waded through its tickling stems or sailors who snared their anchors in its undergrowth, few of us are aware of the 60-plus species of marine flowering plants that constitute seagrass. Fewer of us still appreciate that, like their submarine cousin coral, seagrass orchards are under threat. “The problem with seagrass is that it’s not a charismatic habitat like your coral reef or tropical mangrove,” says Project Seagrass’ Leanne Cullen-Unsworth of the family marine plants that grow in shallow and sheltered coastal waters across the globe.

Seagrass provides a range of services to terrestrial ecosystems: food and habitat for marine organisms, maintaining water quality and stabilising the seabed. Most importantly, seagrass meadows are the hidden stars of carbon sequestration; absorbing atmospheric carbon at quicker and higher rates than ecosystems such as tropical forests, one hectare of seagrass can store around 400 kg of carbon dioxide per year, up to 40 times more than a hectare of dry-land forest. (Making it second only to arctic tundra in its capacity as a carbon sink.)

Partly this is down to seagrass’ marine habitat, where oxygen-free sediment traps the carbon in plant material which then remains buried for hundreds of years after the plant dies (unlike the carbon in forests, which can readily be released by burning for fuel).

So seagrass’ loss is a problem for all of us. And sadly, in most global contexts these hard-working marine flora are receding. It is estimated that 92 percent of seagrass in British coasts has been lost in the last century, much of this erosion having occurred by the mid 20th century, when poor water quality borne of rapid industrialisation led to a wasting disease that scientists believe decimated seagrass meadows. Sediments and turbidity have also played their part in seagrass’ demise, as has physical damage from anchors and fishing nets, commercial seaweed production and the tourist industry, where aesthetics of pristine sands and transparent seas reign supreme.

“In tourist spots in the Indo-Pacific it’s common for seagrass to be torn up so a beach looks like the picture postcards,” Cullen-Unsworth says, who is however at pains to point out that seagrass conservation is not simply pitted against human activity – it provides a nursery habitat for commercial fish stocks such as tiger prawn, conch, Atlantic cod and white-spotted spinefoot. Cullen-Unsworth is one of the founders of Project Seagrass, a nonprofit that’s working to raise awareness of this underrated habitat and is undertaking pilot projects to explore how to best regrow eroded seagrass orchards.

Project Seagrass’ first large-scale project, Seagrass Ocean Rescue, is a partnership between Project Seagrass, Cardiff and Swansea universities and Pembrokeshire Coastal forum that aims to reestablish 20,000 square metre seagrass meadow in Dale, West Wales to demonstrate its environmental and biodiversity benefits, and serve as a model that could be replicated anywhere in the world where seagrass meadows are under threat. Costing GB£40,000 [US$52,000], the project is funded by charitable donations and the first of three ocean sites in Wales and England where Project Seagrass plan to restore native seagrasses in coming years.

The project involved volunteer divers harvesting two million donor wild seagrass seeds from extant meadows around the coast of the United Kingdom. The seeds were then planted in biodegradable hessian bags, by volunteers including Welsh schoolchildren, and these bags were launched into the sea at ideal sites off the Pembrokeshire coast. The chief limitation of the project is that native seagrasses take years to reach maturity, making data-gathering on best methods for replanting a slow process. The final seed bags were deployed in December 2020, says Cullen-Unsworth and though it’s early days she’s hopeful.

“We’re already seeing signs of germination,” she says. “It might be five to 10 years before we can absolutely demonstrate evidence of benefits in terms of carbon sequestration and biodiversity support, but still it’s all very exciting.”

Seagrass Ocean Rescue is one of a handful of global projects seeking to reseed lost seagrass meadows, including a 20-year project to restore native eelgrass meadows at Chesapeake Bay in the US and a University of Gothenburg-led project to restore seagrass meadows along Sweden’s West Coast. Cullen-Unsworth believes that this underwater climate hero will soon get the attention it deserves.

“Britons used to be maritime people who were fully aware of marine habits like seagrass and their role in helping ecosystems to thrive. My hope is that seagrass will once again be as appreciated as grasslands and forests.”

Author: Sally Howard, The India Story Agency for Sacred Groves

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Under the azure waters of the Andaman Sea, sturgeon, parrot fish and stingrays swim past a strange new structure close to a coral reef formation. Above, a small solar panel bobs on the water’s surface. This is an artificial reef built by Indian environmental charity ReefWatch. The founders of this tiny non-profit outfit are passionate about the conservation of the magnificent coral atolls in India’s Andaman and Nicobar Islands, training local divers to collect naturally broken coral fragments and implant them on to an artificial metal reef. There is, they soon realised, one basic problem with building new coral reefs: “Coral reefs grow between 0.5-7 cm per year,” says Nayantara Jain, Executive Director of the programme. “At this rate, it will take artificial reefs decades to flourish.”

So ReefWatch implemented a simple, radical strategy to enable coral to grow faster. “We hook our artificial metal reefs to a small floating solar panel,” explains Jain. The mild electric current generated by the floating solar panel helps speed up coral growth by seven to twelve times by enabling faster accretion of calcium carbonate. And the electric current leaves the coral with more of an energy budget that it can use to survive warmer temperature spells and coral disease. Jain and her small team, which includes three local youth, predict these artificial reefs could have a far-reaching impact. Just before the lockdown, the team developed a new solar panel design to make coral accretion even more efficient. With the old accretion system, coral would start re-growing within three months. “Now, perhaps it will grow faster,” Jain says. The team also creates diverse natural habitats under each artificial reef using rocks, shells and aquatic plants. “Consequently, we see an immediate uptick in marine life as soon as the artificial reef is set up,” she says.

In the long term, ReefWatch plans to develop a replicable model for coral reef regeneration which involves local stakeholders. Some of their work involves education: through workshops in schools, colleges and elsewhere, they are spreading awareness about how coral reefs protect the fragile local ecology and bulwark these islands against tsunamis and high tides. “We’re also employing local divers to salvage broken coral and maintain our new reefs,” she says. “Hopefully, this will encourage them and others in their community to look after their habitat.” Jain plans to make the project volunteer tourism-driven and hopes to entice divers and beach enthusiasts to spend some time in these picturesque islands and help build artificial reefs. “If protecting their biodiversity could generate higher tourism revenues,” she says, “the programme could eventually be taken over by the local community entirely, leaving us free to replicate this project elsewhere.”  

ReefWatch has built nine reefs so far, all positioned near natural coral formations. In time, these will mature, merge and support diversity of marine life. Each reef costs around US$2,000 and requires regular maintenance in the first few years of its installation. On World Oceans Day in June 2020, ReefWatch launched the first edition of its Adopt A Reef programme, inviting people to sponsor part of an artificial reef for US$470 per year. Within six weeks, all their existing reefs found sponsors. “The government has now allowed us to work in other areas in the Andaman Islands,” says Jain. “We want to build more reefs now…”

Images Credit: ReefWatch Marine Conservation
Author: Geetanjali Krishna, The India Story Agency for Sacred Groves

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