Wednesday, February 14, 2018

Identifying feeding areas of the Fernando de Noronha seabirds


During the last two years we have been working together with the Oceanica NGO and researchers of the Institut de recherche pour le développement (IRD, France) and Universidade Federal de Pernambuco (UFPE, Brasil), in a project funded by the Fundação Grupo Boticário. The project took place in Fernando de Noronha (FN) archipelago with the main goal of identifying vulnerable ecological areas for seabirds of FN, which is an oasis of marine life in relatively barren open ocean. Indeed among others remarkable biological features, FN accommodates the largest concentration of tropical seabirds to be found in the Western Atlantic Ocean. FN is protected by two different categories of protected area, according to the Brazilian legistlation: an APA (environmental protection area) covering mainly terrestrial ecosystems since 1986 and a marine national park, covering 112.7 km2 of the archipelago, since 1988. Since 2001, the APA and the core and buffer area of the national park were listed as World Heritage by UNESCO. During these years, Sophie Bertrand, responsible for the fieldwork activities, and her team collected data on red footed boobies (Sula sula), brown boobies (Sula leucogaster) and especially masked boobies (Sula dactylatra) species. 

Photo of Sula Sula individuals. By Sophie Bertrand
In particular, the team has tagged several individuals with GPS, dive and accelerometer recorders to understand feeding areas and marine behavior during critical periods. This requires capturing the same bird twice, once to deploy the equipment and a second time to recover the device and the data recorded. In addition, at each recapture, animals were measured and biologically sampled (including prey regurgitated). Those biological samples will be analysed by isotopic analyses for identifying their trophic niche (N and C isotopes) and for estimating global biocontamination (Hg isotopes).


Photo of the procedure of capture-recapture. By Sophie Bertrand

Among the top predators of the ecosystem, there is also the artisanal fishery of the archipelago. This is a small fleet (less than 10 units) that mainly fish with live bait (the 'sardinha' or the 'garapao' whose schools frequent the islands beaches). The fishers' catches consist mainly of barracudas, but also of some jacks, tuna and snappers. During the project two crew members boarded periodically with fishers to document main fishing grounds, fishing activities and catches. 

Photo of the fishery of FN. By Sophie Bertrand

By analyzing both the bird and the fishing data, we hope to better understand how the structuring of marine habitat conditions the behavior of seabirds, and how they are orienting and feeding in what appears at first glance as a big blue desert. This knowledge should also feed into a reflection on the relevance of different tools for their conservation.

For more information about the project take a look to the blog https://fnavesmarinhas.blogspot.com.es/

Monday, January 29, 2018

What you are doing the FEME group students?

Today we will talk about Natalia. Currently, she is doing a PhD thesis in Ecology at the Federal University of Rio Grande do Norte. Her thesis associates habitat preferences, demography and molecular tools aiming to assess the vulnerability of the endemic and endangered Greenbeak parrotfish (Scarus trispinosus), with the goal of subsidizing actions for the species conservation. Last year she worked very hard to collect data...take a look!

Aiming to investigate habitat preferences, underwater visual censuses were conducted along Rio Grande do Norte coast (Brazilian northeast) to collect density and biomass patterns of five endemic Brazilian parrotfish species. 

Endemic Brazilian parrotfish individuals.

The visual censuses consist of belt transects in which a diver identified, counted and estimated the total length of the parrotfish species inside an area of 40 m² (20 x 2 m). 


Natalia during a visual census.

Parrotfish biomass was estimated using length-weight relationships available in the literature. Following each visual census, a second diver ran the same belt transect taking one photo of the benthos every two meters, resulting in ten photos per transect. Each photograph was analyzed with the software photoQuad to investigate the benthic cover. 

Looking for reef features.

Other reef features (complexity, depth and coast distance) of each site are also considered. The data are being analyzed and the results will be shown soon. 



Wednesday, November 22, 2017

Thousands of scientists give a second notice to humanity

More than 15,000 scientists from 184 countries have published a second warning to humanity advising that we need to change our wicked ways to help the planet. Among them the FEME members signed this call.
This new message is an update of the original warning sent from the Union of Concerned Scientists 25 years ago. But today the picture is far worse than it was in 1992.
It's true that some progress had been made in some areas - such as cutting ozone-depleting chemicals, and increasing energy generated from renewable sources - but this was far outweighed by the damaging trends.
In the past 25 years:
  • The amount of fresh water available per head of population worldwide has reduced by 26%.
  • The number of ocean "dead zones" - places where little can live because of pollution and oxygen starvation - has increased by 75%.
  • Nearly 300 million acres of forest have been lost, mostly to make way for agricultural land.
  • Global carbon emissions and average temperatures have shown continued significant increases.
  • Human population has risen by 35%.
  • Collectively the number of mammals, reptiles, amphibians, birds and fish in the world has fallen by 29%.
Many of our current practices put at serious risk the future that we wish for human society and the plant and animal kingdoms, and may so alter the living world that it will be unable to sustain life in the manner that we know.

In this letter scientists give 13 suggestions for managing our impact on the planet, including establishing nature reserves, reducing food waste, developing green technologies and establishing economic incentives to shift patterns of consumption.
We can all do something every day to stop this negative trend. Take a look at the article here:

Ripple, W. J., et al., (2017). World Scientists’ Warning to Humanity: A Second NoticeBioScience.



Thursday, October 19, 2017

Plastic nanoparticles cause brain damage in fish


A study conducted at the University of Lund (Sweden) revealed that plastic nanoparticles reduce the survival of zooplankton and penetrate the fish brain, causing behavioral disturbances. This pioneering study was published in the journal Scientific Reports, last month.
The increase in the production of plastic material in the last decades around the world has turned plastic waste into a major problem in the oceans. About 60-80% of all marine litter is made out of plastic, affecting at least 660 marine species (the ones we know so far), showing that this material is a serious pollutant for aquatic environments. Through physical-chemical and biological reactions caused by environmental conditions, the plastic material is divided into smaller and smaller pieces, reaching the size of nanoparticles. Being so small is a dangerous characteristic because the plastic nanoparticles are able to overcome biological barriers, penetrating tissues and accumulating in organs, thus affecting the behavior and the metabolism of the organisms.
One of the things this study shows is how plastic nanoparticles strongly affect an aquatic food chain from the zooplankton Daphnia magna to the top consumer, the freshwater fish, Crucian carp (Carassius carassius), which is a species common in anthropogenically affected waters. The researchers showed that amino-modified polystyrene nanoparticles were transferred through a three-level food chain, algae-zooplankton-fish, directly affecting the brain of these fish, modifying their behavior in terms of activity, feeding time and distance they need to swim to consume the food provided.
IStock Photo.
The authors suggests that the effects caused by plastic nanoparticles to the biota depends on both concentration and size of particles, therefore they specifically appeal to plastic manufacturers to adjust the nanoparticles production to sizes that are less dangerous for the metabolism of organisms, so that from a wider perspective, the top consumers, humans, will not come to be affected by their own garbage.


By Thiago Guerra
Literature cited:
Mattsson et al. Brain damage and behavioural disorders in fish induced by plastic nanoparticles delivered through the food chain. Scientific Reports 7:11452.

Saturday, September 2, 2017

Brazilian fishery is drifting


In December 2015 we interviewed Mauro Ruffino. In this interview we asked his opinion about the extinction of the Ministry of Fisheries and Aquaculture (MPA) and its incorporation into the Ministry of Agriculture, Livestock and Supply (MAPA), among other questions. At the time, he made it clear that the change was being made in a disorderly way, but that should not be a problem as long as MAPA gave aquaculture, artisanal fishing and industrial fishing the same treatment. Little did we know that that was only the beginning of a political saga involving Brazilian fisheries…
The truth is that the story does not really begin in 2015. Since 2011 the institutional fishing sector has been quickly dismantled, probably with the support and applause of many that do not want to see sustainable fishery policies being properly implemented. Specifically, 2011 marks the end of national fisheries statistics and the beginning of an era of political instability. In 2015 we watched, still rather hopefully, the end of a dysfunctional Ministry of Fisheries, and the incorporation of the fishing sector into MAPA, as the Aquaculture and Fisheries Secretariat. The transition was turbulent, and right when parts of the sector, namely the industrial one, had begun to adapt, we are surprised by another change, driven by political party interests. In March 2017, the Aquaculture and Fisheries Secretariat was once again transferred to another ministry, this time to the Ministry of Industry, Foreign Trade and Services. Yes, the names of ministries are as schizophrenic as their goals. 
Charge depicting the "requirements" to be a Ministry in Brazil ("if he knows how to change a light bulb, he will be the new minister of Mines and Energy"). By Sinovaldo.

It seems that Dr. Ruffino’s fears of not having small-scale fisheries properly represented might just come to pass under a ministry that carries “industry” in its name. Such incorporation of all fisheries into the Ministry of Industry, Foreign Trade and Services seeks to encourage investments of national and international business, as an attempt to industrialize the national fishery further. Under such policy, small-scale fisheries are not that relevant after all, they just provide barely more than half of the fish we eat and employ most of the fishers in the country.  
Sarcastic comments apart, the country is not prepared to boost industrial fisheries and aquaculture, without basic knowledge on our stocks and on our environment. Perhaps it is time to acknowledge and fix the mistakes done in 2011 with the suspension of fishery statistics before venturing into uncharted waters. Besides, I do want to draw attention to the marginalization of the whole small-scale fishery sector, which seems to become more and more invisible under stronger and stronger neoliberalism. The new policies tend to follow the revitalized heading of the country: wealth centralization at the costs of ignoring millions of families that depend on these resources. 
One thing is certain: the fishing industry is being forced once again to adapt to a new way of working, hoping to pave its way through the corridors of a new political institution. The small-scale sector, on the other hand, without any power to lobby, sinks in dark waters, while few politicians that completely ignore the reality of Brazilian fisheries, celebrate their new positions.

Fábio Carvalho

Tuesday, July 25, 2017

A plastic soup called Ocean

Does plastic around the world really get recycled? Not at all! Only 9% of discarded plastic is recycled. Plastic pollution is threatening the marine ecosystem worldwide. More than 8 billion tons of plastic are produced by humanity, and about 8 million tons are dumped into our oceans every year, where it persists for decades. Over the next years, the amount of marine plastic waste will double if we do not act. A global issue affects our ocean, our health, and our well-being. In fact, oceans host 80% of the planet’s biodiversity, they are the largest ecosystem on Earth, and are an import source of food. Despite the fact that researchers are uncertain about the nature and extent of the risk of marine debris on ecosystems and humans, the concern about plastic persistence and their effects on the oceans has increased since the last decade.

Once in the ocean, the huge amount of plastic, although widespread, affects the safety of sea transport, fisheries, tourism, recreation, and biodiversity. Bags, bottles, straws, rope, fishing gear and pieces of plastic are affecting a diversity of ocean wildlife, such as whales, turtles, fishes, crustaceans, and seabirds. Even marine animals living in the deepest waters are influenced by the high concentration of plastic in the oceans. Besides, the entry of plastic pieces into our food chain is one of the biggest unknown to human health. For example, when plastic broken up, its tiny pieces can attract toxic chemicals released from industry and agriculture, and move up across the food chain, from bottom feeders to apex predators. However, beyond the food web issues, the interaction with wildlife, by ingestion and entanglement, is the most direct impact from plastic pollution (Rochman et al., 2016) (Figure 1).


Figure 1: A small crustacean that make his home in plastic container carried to the ocean. 

Nevertheless, how does the concentration of plastics in the ocean have affected almost all islands around the world, even though those practically uninhabited? How all this plastic comes in remote places? A range of factors influences the abundance of plastics debris in beaches, including local currents, beach topography, and weather conditions. A study published this year provided a comprehensive analysis of the quantity and source of beach-washed plastic on one of the world’s remotest island (Lavers and Bond, 2017).

The Henderson Island, located in the South Pacific, presents the world’s highest density of plastic waste, about 671 items per square meter totaling almost 18 tons (Figure 2). How an uninhabited island got the world’s highest density of trash? In spite of no one lives there, the island is in the way of a circular ocean current and receives waste from ships coming from the coast of South America, acting as sinks for the waste of the world. Aside from fishing gears, the researchers found a variety of familiar everyday items in the island’s beaches, such as water bottles, toothbrushes, lighters and razor blades.


     Figure 2: Plastic debris on East Beach on Henderson Island, much of them originated from fishing-related activities and land-based sources.


More in general, plastics have become increasingly dominant since the 1940s. At least 4 billion tons of plastic have been manufactured only in the last 13 years, and current trends point to the production of 12 billion tons of plastic waste by 2050. The annual production of plastic has increased from 1.7 million tons in 1954 to 311 million tons in 2014 (Plastics Europe, 2015). However, the highest recycling rate is only 30% (Europe), followed by 25% (China) and 9% (USA). Fortunately, a team of scientists has found a species of bacteria that eat a type of plastic (polyethylene terephthalate or PET) found in most of disposable water bottles (Yoshida et al., 2016). The study shows that these organisms can eat the PET pretty well, so a bowl of plastic soup would be a good meal for them. However, others initiatives, encompassing different sectors, are necessary to reduce the mismanaged plastic waste generated by society as well as industry. For example, the production of coating tiles from PET bottles by Brazilian architecture, an innovative product that takes 66 bottles from the environment to produce 1 m2 of coating (rivesti.com.br).  

However, although, small changes can generate a big impact, the issue of how manage all the retrieved plastic is still open. When you cast plastic into the ocean, it does not go away. Well, this is not really true! Indeed, in spite of plastic is so permanent and so indestructible, some technologies have been developed to recycle plastic removed from the sea. Some initiatives have been established by nongovernmental organizations and foundations, such as the Cleanup Day Organization (cleanupday.org) and the Plastic Oceans Foundation (plasticoceans.org), but also big companies are supporting conservation actions. For example, in 2016, the Beazley Designs Award (beazleydesignsoftheyear.com) selected a trainer sneakers made of waste plastic filtered from the ocean. In the same year, another product was announced how the first ocean friendly swimwear produced by recycling fishing nets and other discarded nylons. Sustainability initiatives that create products and encourages creatives to repurpose sea waste and raise awareness of the growing issue have been increased and are crucial to protecting marine life below the surface. 


Figure 3: Running sneakers (Adidas brand) and swimwear (Volcom brand) made out of recycled ocean waste.


Another crucial point about plastic in the oceans is regard fishing gear left at sea (also called ghost gear) having a severe negative impact on the oceans life. The Global Ghost Gear Initiative (ghostgear.org) is an important project to create global awareness and to reduce the amount of plastic on the oceans. In addition, the Forestry Foundation and the Fisheries Institute of Sao Paulo State are working in a similar initiative in Brazil, called Lost Fishing Gear Project. This partnership aims to tackle the problem of abandoned, lost or otherwise discarded fishing gear in the waters off the coast of Brazil. Since the project started in 2009, over 2 tons of lost fishing gear have been removed during clean-up diving campaigns around Brazilian coastline.


Nowadays, the scientific literature about marine plastic debris is increasing considerably, probably reflecting a growing concern that marine debris are hazardous. The study to quantify ocean trash on a global scale concluded that 8 million tons of trash flow into the ocean every year (Jambeck et al., 2015). However, without waste management improvements, and based on population growth data, the cumulative quantity of plastic waste available to enter the ocean from land is predicted to increase by an order of magnitude by 2025. Prevention and mitigation of this issue are extremely challenging and costly and requires considerable time although is crucial to breaking the vicious cycle of plastic pollution. If we do not change our behavior we might end up with more plastic than fish in the ocean. 

Then, will the unrecycled oceans survive in the Anthropocene? Once the marine debris is a global environmental issue, the oceans’ survival will depend on the global efforts and investments in solutions that will raise awareness of plastic pollution. Sustainability efforts have been created around the world, but some mitigation strategies, including economic, socio-cultural, and environmental concerns, must be adopted, such as controlling plastics consumption and waste generation, creating new methodologies to recycle plastic waste, and extended producer responsibility as well. Since the oceans provide a variety of vital ecosystem services, the general population, the industry and the political system need to work together to reverse that plastic soup into a healthy meal! 

References
Jambeck, J. R., Geyer, R., Wilcox, C., Siegler, T. R., Perryman, M., Andrady, A., et al. 2015. Plastic waste inputs from land into the ocean. Science, 347(6223), 768-771.

Lavers, J. L. and Bond, A. L. 2017. Exceptional and rapid accumulation of anthropogenic debris on one of the world’s most remote and pristine islands. Proceedings of the National Academy of Sciences, 114 (23): 6025-6055.   

PlasticsEurope. 2015. Plastics – the Facts 2015: An analysis of European Plastics Production, Demand and Waste Data (PlasticsEurope Market Research Group, Brussels).

Rochman, C. M., Browne, M. A., Underwood, A. J., Franeker, J. A., Thompson, R. C., & Amaral‐Zettler, L. A. 2016. The ecological impacts of marine debris: unraveling the demonstrated evidence from what is perceived. Ecology, 97(2), 302-312.

Yoshida, S., Hiraga, K., Takehana, T., Taniguchi, I., Yamaji, H., Maeda, Y., ... & Oda, K. 2016. A bacterium that degrades and assimilates poly (ethylene terephthalate). Science, 351(6278), 1196-1199.


 By Monalisa Rodrigues

Wednesday, July 5, 2017

How does climate change affect fishing?


            Worldwide over 600 million people depend directly or indirectly on fisheries and aquaculture for their livelihoods. Fish provide essential nutrition for over 4 billion people and at least 50 percent of animal protein and essential minerals to 400 million people in the poorest countries. In addition to the pressure exerted by human activities, such as over-fishing, habitat degradation and pollution, both fisheries and ecosystems are exposed to threats related to climate change. It is known that climate change is part of Earth's geological history, but that is not all. In the last 150 years we have been observing a rapid warming of the atmosphere, intensified in the last decades and attributed to the increase in the emissions of greenhouse gases, mainly carbon dioxide from human activities.
            Climate variability and change are already affecting aquatic systems physical, chemical, and biological processes. On the coastal zones for instance it is observed increasing levels of the sea. Climate change can also lead to a number of other impacts, such as intensification of storms, changes in freshwater precipitation and freshwater inputs, increased saltwater intrusion into the soils and coastal aquifers, ocean acidification, and profound changes in the force, direction and behavior of marine currents. Such alterations are expected to be already affecting fish life cycles, habitats, species compositions, distributions, and abundance, which can impact fisheries management, livelihoods, food security and sustainable development.
            The potential effects of climate change on fisheries can be divided between those that will affect the fishing activity itself and those that will affect the biological and ecological dynamics of the fishery resources. In the first group, sea level rise and the increase in the frequency and intensity of the storms are highlighted, mainly for the artisanal fishery, because the climatic conditions are a limiting factor of the fishing activity. In the case of fishery resources, the main expected biological effects refer to changes in breeding or migration periods of the species; increased occurrence of diseases; changes in latitudinal and depth distribution patterns of species; changes in population size and community composition; and changes in inter- and intraspecific relations, such as competition and predation.
            Brazilian fishermen already notice these changes. A study published in 2016 reports that in several Brazilian states (AL, SE, BA, CE, PI, RN, PA and AM) fishermen have observed increased tidal and river levels and the drying up of rivers, lagoons and reservoirs. Changing water regimes is detrimental to species cycles and causes failures in the species food chain and fish production. In the states of Piauí and Sergipe, the migration of marine species to the rivers has been identified. At the same time, the mortality of river fish is observed due to the increase in the quantity of salt water in the estuary. There has been a recurrent complaint that the winds have changed their incidence and intensity, and that more extreme events are now common. There is a higher number of registries of accidents with vessels, mainly in Ceará, Pernambuco, Pará, Espírito Santo, and Rio Grande do Norte, due to sudden changes of the winds and storms.
            The expected effects of climate change on fishing will be greater than in other periods of geological history that we took part, because for the first time we will have given a hand to make it worse. The sum of these effects endangers the survival of millions of people especially in developing countries. Fisheries management should consider the potential effects of climate change because regular measures alone may not protect species and environments that are rapidly changing.

By Ludmila Damásio