New Sea Around Us research has found drastic decline in the monitored portion of the global seabird population.

The paper, published in PLoS ONE, reports that the monitored portion of the global seabird population decreased overall by 69.7 per cent between 1950 and 2010.

According to Michelle Paleczny, a lead author of the paper, and recent graduate of the zoology program at UBC, these findings likely reflect a global trend because of the large and representative sample. A decline this drastic can cause changes in island and marine ecosystems in which seabirds play a variety of vital roles.

“Decline in seabird abundance stands to disrupt natural processes in island and marine ecosystems in which seabirds play an important role — by acting as predators, scavengers, cross-ecosystem nutrient subsidizers, and ecosystem engineers,” Paleczny says.

In order to investigate global patterns of seabird population data, the researchers assembled a global database of seabird population size records and applied multivariate autoregressive state-space (MARSS) modeling to estimate the global path of all seabird populations with sufficient data. They obtained data from primary sources including journal articles, books, and unpublished reports.

Several human activities are known to threaten seabird populations, including entanglement in fishing gear, overfishing of food sources, climate change, pollution, disturbance, direct exploitation, development, energy production, and introduced species. Seabird populations are strongly affected by threats to marine and coastal ecosystems, and can indicate  the status of marine ecosystem health.

“Knowing this information helps us to measure and assess the overall effect that human activities and threats have had on seabirds and marine ecosystems over time,” Paleczny explains.

You can read the full report here

Researchers with UBC’s Sea Around Us project have launched a new web platform at www.seaaroundus.org that provides the first comprehensive coverage of both reported and unreported fish caught by every country in the world.

It reveals that official catch reports considerably underestimate actual catches around the world. For example, researchers found there was considerable unreported foreign fishing between 1950 and the early 1970s on Canada’s East coast. In fact, more than half of fish caught were unreported at one point. Much of this ‘catch’ consisted of so-called discards.

UBC professor Daniel Pauly and Dirk Zeller plan to publish a global estimate of fisheries catch in a peer-reviewed paper.

“The new Sea Around Us data have significant global scope and are long awaited by many groups worldwide,” said Zeller, senior researcher and project manager for Sea Around Us. “Accurate estimates are important for policy makers and fisheries managers to make economical and sustainable decisions about our fishing policies and fisheries management.”

The new data combine estimates of unreported catches — determined through extensive literature searches, consultation with local experts, and calculation of discarded fish — with officially reported data for small and large-scale fisheries for every country. The data emerged from a decade-long catch reconstruction project.

“We know these data will have major global impacts and now they are accessible in a visual, simplified and comprehensive way,” Pauly said.

Accurate catch data provide important insights into fisheries, fish populations and underlying ecosystems, and such data can have economic impacts.

The Sea Around Us is currently funded by The Paul G. Allen Family Foundation. This is the first time the project has released new data in over five years. It can be accessed at www.seaaroundus.org

BACKGROUND

About UBC’S Sea Around Us
The Sea Around Us was initiated in 1999, and aims to provide integrated analyses of the impacts of fisheries on marine ecosystems, and to devise policies that can mitigate and reverse harmful trends while ensuring the social and economic benefits of sustainable fisheries. Sea Around Us has assembled global databases of catches, distributions of fished marine species, countries’ fishing access agreements, ex-vessel prices, marine protected areas and other data – all available online.

Sea Around Us is a long-standing collaboration between the University of British
Columbia and The Pew Charitable Trusts, and since 2014 is supported by The Paul G. Allen Family Foundation.

About The Paul G. Allen Family Foundation
Founded in 1988, the Paul G. Allen Family Foundation is dedicated to transforming lives and strengthening communities by fostering innovation, creating knowledge and promoting social progress. The Sea Around Us program is another example of how the Foundation supports the use data and technology to inform conservation priorities and actions.

View this press release on UBC News here