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fisheries

Impacts of climate change on marine fisheries, aquaculture, coastal tourism, and human health: an update

The Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), released in 2013 and 2014, highlighted the vulnerability, impacts and adaptation of marine systems to climate change and ocean acidification. As this field of research is constantly building and evolving, “Observed and projected impacts of climate change on marine fisheries, aquaculture, coastal tourism, and human health: an update” was recently published as an update of findings since the release of the report.

Temperature-based targeting in a multispecies fishery under climate change

The paper “Temperature-based targeting in a multispecies fishery under climate change” was recently published in Fisheries Oceanography by Nereus Program Fellow Daniel Dunn (Duke University) and Principal Investigator Patrick Halpin (Duke University). The study looked at whether the bottom temperature of the water, in spring and fall, affected the distribution of Atlantic cod in the USA Northeast compared to other species of fish.

Ask an Expert: Why is the global fishing industry given $35 billion in subsidies each year?

OceanCanada Research Director Rashid Sumaila and his collaborators from the UBC Global Fisheries Cluster (Sea Around Us and the Nereus Program) have published an updated estimate of global fisheries subsidies in the international journal Marine Policy. The researchers found that the global fishing industry is being supported by $35 billion yearly in government subsidies, the majority of these, upwards of $20 billion annually, promote increased capacity that can lead to harmful impacts such as overfishing.

Climate change effects on illegal, unreported and unregulated fishing

A range of human pressures is threatening the sustainability of marine fisheries. Amongst those, overfishing, partly driven by Illegal, Unreported and Unregulated (IUU) fishing, is a major stressor. Thirty percent of global fish catch goes unreported, found a recent study by Nereus Program collaborator Sea Around Us.

But the relationship between IUU fishing and climate change is a new topic. I speculate that climate change impacts on fisheries may indirectly increase IUU fishing.

Investigating ideal fishing conditions for tuna and swordfish in the U.S. northwest Atlantic ocean

Recently published in Fisheries Oceanography by Nereus Alumnus Andre Boustany (Duke University) and Principal Investigator Patrick Halpin (Duke University) was the study “Tuna and swordfish catch in the U.S. northwest Atlantic longline fishery in relation to mesoscale eddies”. This research looks at the effects of different variables on the catch of tuna and swordfish — including mesoscale eddies, which are a type of ocean current, sea surface temperature and fishing gear used.

Jellyfish for dinner: Is fishing a viable solution to the increase in jellyfish blooms?

While jellyfish, with their soft, gelatinous bodies, may seem like innocuous creatures, when they occur in large blooms they can often cause detrimental effects. Jellyfish blooms have been observed to clog power plants, cause mass mortality to fish in aquaculture farms, burst fishing nets and even sink a 10 tonne fishing vessel. It is predicted that jellyfish will benefit from climate change and other anthropogenic changes, such as overfishing, eutrophication and coastal development.

The status and future of bluefin tunas in our global ocean: The Bluefin Futures Symposium

by Guillermo Ortuño Crespo

For three days from January 18th to 20th, Monterey, California, has become an aggregation hotspot for more than 100 of the world’s foremost experts on the conservation and management of the three bluefin tuna species that inhabit our global ocean. The Bluefin Futures Symposium represents the first-ever international gathering of leading science, policy, industry and conservation leaders to address the current stock status, research efforts and management uncertainties, topics which hold the key to ensuring the future sustainability of harvesting these ocean predators.

Sea Around Us study finds 30 per cent of global fish catch is unreported

Countries drastically underreport the number of fish caught worldwide, and the numbers obscure a significant decline in the total catch.

The new estimate, released today in Nature Communications, puts the annual global catch at roughly 109 million metric tons, about 30 per cent higher than the 77 million officially reported in 2010 by more than 200 countries and territories. This means that 32 million metric tons of fish goes unreported every year, more than the weight of the entire population of the United States.