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Twice as many fishing vessels now, but it’s harder to catch fish

first_imgArticle published by Shreya Dasgupta Popular in the CommunitySponsoredSponsoredOrangutan found tortured and decapitated prompts Indonesia probeEMGIES17 Jan, 2018We will never know the full extent of what this poor Orangutan went through before he died, the same must be done to this evil perpetrator(s) they don’t deserve the air that they breathe this has truly upset me and I wonder for the future for these wonderful creatures. So called ‘Mankind’ has a lot to answer for we are the only ones ruining this world I prefer animals to humans any day of the week.What makes community ecotourism succeed? In Madagascar, location, location, locationScissors1dOther countries should also learn and try to incorporateWhy you should care about the current wave of mass extinctions (commentary)Processor1 DecAfter all, there is no infinite anything in the whole galaxy!Infinite stupidity, right here on earth.The wildlife trade threatens people and animals alike (commentary)Anchor3dUnfortunately I feel The Chinese have no compassion for any living animal. They are a cruel country that as we knowneatbeverything that moves and do not humanily kill these poor animals and insects. They have no health and safety on their markets and they then contract these diseases. Maybe its karma maybe they should look at the way they live and stop using animals for all there so called remedies. DisgustingConservationists welcome China’s wildlife trade banThobolo27 JanChina has consistently been the worlds worst, “ Face of Evil “ in regards our planets flora and fauna survival. In some ways, this is nature trying to fight back. This ban is great, but the rest of the world just cannot allow it to be temporary, because history has demonstrated that once this coronavirus passes, they will in all likelihood, simply revert to been the planets worst Ecco Terrorists. Let’s simply not allow this to happen! How and why they have been able to degrade this planets iconic species, rape the planets rivers, oceans and forests, with apparent impunity, is just mind boggling! Please no more.Probing rural poachers in Africa: Why do they poach?Carrot3dOne day I feel like animals will be more scarce, and I agree with one of my friends, they said that poaching will take over the world, but I also hope notUpset about Amazon fires last year? Focus on deforestation this year (commentary)Bullhorn4dLies and more leisSponsoredSponsoredCoke is again the biggest culprit behind plastic waste in the PhilippinesGrapes7 NovOnce again the article blames companies for the actions of individuals. It is individuals that buy these products, it is individuals that dispose of them improperly. If we want to change it, we have to change, not just create bad guys to blame.Brazilian response to Bolsonaro policies and Amazon fires growsCar4 SepThank you for this excellent report. I feel overwhelmed by the ecocidal intent of the Bolsonaro government in the name of ‘developing’ their ‘God-given’ resources.U.S. allocates first of $30M in grants for forest conservation in SumatraPlanet4dcarrot hella thick ;)Melting Arctic sea ice may be altering winds, weather at equator: studyleftylarry30 JanThe Arctic sea ice seems to be recovering this winter as per the last 10-12 years, good news.Malaysia has the world’s highest deforestation rate, reveals Google forest mapBone27 Sep, 2018Who you’re trying to fool with selective data revelation?You can’t hide the truth if you show historical deforestation for all countries, especially in Europe from 1800s to this day. WorldBank has a good wholesome data on this.Mass tree planting along India’s Cauvery River has scientists worriedSurendra Nekkanti23 JanHi Mongabay. Good effort trying to be objective in this article. I would like to give a constructive feedback which could help in clearing things up.1. It is mentioned that planting trees in village common lands will have negative affects socially and ecologically. There is no need to even have to agree or disagree with it, because, you also mentioned the fact that Cauvery Calling aims to plant trees only in the private lands of the farmers. So, plantation in the common lands doesn’t come into the picture.2.I don’t see that the ecologists are totally against this project, but just they they have some concerns, mainly in terms of what species of trees will be planted. And because there was no direct communication between the ecologists and Isha Foundation, it was not possible for them to address the concerns. As you seem to have spoken with an Isha spokesperson, if you could connect the concerned parties, it would be great, because I see that the ecologists are genuinely interested in making sure things are done the right way.May we all come together and make things happen.Rare Amazon bush dogs caught on camera in BoliviaCarrot1 Feba very good iniciative to be fallowed by the ranchers all overSponsored The global fishing fleet has more than doubled from about 1.7 million boats harvesting fish in 1950 to 3.7 million fishing vessels in 2015.More fishing vessels have become motorized as well: while only 20 percent of the world’s fishing vessels were powered by motors in 1950, this number rose to 68 percent in 2015.The growing fishing fleet is, however, catching less seafood for the same effort.There are geographic variations: while Asia’s fishing fleet has dramatically increased over the past decades, catching fewer fish for the same effort, fleet sizes in North America and Western Europe shrank slightly, accompanied by an increase in fish catch per unit effort. How many ships and boats ply the world’s oceans for seafood today? Researchers have a new estimate: where there were about 1.7 million boats harvesting fish in 1950, the number more than doubled to 3.7 million fishing vessels in 2015.More fishing vessels have become motorized as well. While only 20 percent of the global fishing fleet was powered by motors in 1950, this number rose to 68 percent in 2015, albeit most are equipped with small engines of less than 50 kilowatts. The ballooning fishing fleet is, however, catching less seafood for the same effort, the researchers report in a new study published in the Proceedings of the National Academy of Sciences.“It is the most thorough and detailed attempt to estimate the trend in fishing power and effort around the world,” Ray Hilborn, a marine biologist and fisheries scientist at the University of Washington, U.S., told Mongabay. Hilborn was not involved in the study, but he edited the paper.International organizations like the United Nations’ Food and Agriculture Organization (FAO) have previously come up with numbers of global fishing vessels. But these data have gaps in them, making comparisons or predictions difficult, the researchers say. So a team led by Yannick Rousseau, a graduate student at the University of Tasmania, decided to recalculate the numbers from scratch.Rousseau and his colleagues collated fishing fleet data from several sources, including national and international databases, government records, and scientific papers and reports. They then separately analyzed the data for powered and unpowered small-scale fishing boats, or artisanal boats, and larger, commercial, or industrial vessels, which can venture further out to sea.“The artisanal and industrial fleets are often aggregated, and that is an issue as they are not at all managed the same way. So considering them as one homogenous block would lead to great uncertainties,” Rousseau told Mongabay.The study analyzed data separately for small-scale, or artisanal, fishing vessels and for industrial, or commercial, ones. Image by Rhett A. Butler/Mongabay.Overall, there was an increase in number of fishing boats and ships globally since 1950, and a corresponding decline in catch per unit effort, or CPUE. The latter measures the amount of fish being caught over the same effort — over a single day’s effort, for example — and is often considered to be an indicator of how fish populations are doing.But zoom into the data and you see different geographic patterns emerge.The fishing fleet in Asia has dramatically increased over the past decades, for example, while fleet sizes in North America and Western Europe experienced slight reductions. Similarly, the motor power of fleets in Europe, North America and Australia more than doubled between 1950 and 1980, followed by a dramatic reduction in the 2010s. On the other hand, the total engine power of the Asian fleets has drastically increased since 1950.Between 2000 and 2015, Europe and North America saw some increase in catch per unit effort, suggesting fish stocks may have stabilized, possibly due to effective fisheries management. Yet during the same time period, there was a sharp decline in CPUE in Southeast Asia, the Indian subcontinent and Latin America, indicating that “their fisheries expanded at a much faster rate than fish stocks could support,” Rousseau said.The lesson, Hilborn said, “is that yes fishing effort can be reduced, and it has been done in some of the world. It needs to be done in most of the places where it has not been reduced.”Large, motorized industrial vessels represent less than 5 percent of the global fishing fleet, but account for a third of the total engine power. Image by Rhett A. Butler/Mongabay.There were variations among artisanal and industrial fishing vessels as well. Until the 1980s, both artisanal and industrial fleets showed similar trends of increasing engine power. But over the past three decades, where the growth of motorized industrial fleets has slowed, the combined engine power of all powered artisanal boats is now equal to that of the industrial. Most of the smaller boats dominating the global fishing fleet in number are powered by engines of less than 50 kilowatts, however, and make up only a small part of the total engine power. By contrast, the large, powered industrial vessels represent less than 5 percent of the fleet, but account for a third of the total engine power.“What is considered artisanal today is more ‘powerful’ than what was considered artisanal 50 years ago although it is highly variable by region,” Rousseau said. “So the number of vessels in each sector keeps on increasing — except in richest countries, where they have undergone fleet reductions — but as the average engine power is increasing too, that leads to boats capable of going further and longer at sea, more efficiently, higher powered gears and increased pressure on the oceans.”The researchers note that there are “vastly varying definitions of artisanal fishing globally,” which could bring “a certain level of uncertainty and overlap” to their findings.Despite the growth in powered artisanal boats, the impacts they have on fish stocks could be very different from that of large trawlers, Ratana Chuenpagdee, a professor at Memorial University of Newfoundland, Canada, told Science news. The impacts, she says, will also depend on the type of fishing gear the fishing vessels use, as well as politics.Rousseau said the trend toward increased motorization of the global fishing fleet is likely to continue, which means the average engine power will also keep on growing. “If countries do not reduce the number of vessels, the oceans might not be able to sustain more efficient vessels,” he said. “It is important to note, however, that developed countries have started fleet reduction schemes, which mean that they do take the science into account and realise that it is possible to manage fisheries sustainably.”Banner image of fish being sold in Indonesia by Rhett A. Butler/Mongabay.Citation:Rousseau, Y., Watson, R. A., Blanchard, J. L., & Fulton, E. A. (2019). Evolution of global marine fishing fleets and the response of fished resources. Proceedings of the National Academy of Sciences, 201820344. doi:10.1073/pnas.1820344116center_img Animals, Biodiversity, Conservation, Environment, Fish, Fisheries, Fishing, Marine, Marine Biodiversity, Marine Conservation, Marine Crisis, Oceans, Overfishing, Research, Wildlife last_img

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