Saving Seafood

Global review throws light on gender-based violence in fisheries

March 28, 2023 — A new study published today in Fish and Fisheries argues that gender-based violence (GBV) cannot be separated from other actions taken to achieve equitable social outcomes through fisheries management.

UN Women defines gender-based violence as any act of violence against a person or group of individuals based on their gender, and includes physical, sexual, emotional, verbal, psychological threats, harassment, coercion, or any other deprivations of liberty.

Globally, there has been increased attention on understanding and integrating gender dimensions in fisheries. However, the intersection between fisheries and gender-based violence has received much less attention.

To better understand the issue, four gender and fisheries experts conducted a global review of capture fisheries and identified five types of gender-based violence ‒ these were physical, sexual, psychological, economic and cultural violence.

Dr. Sangeeta Mangubhai, an Industry Fellow at the University of Technology Sydney (UTS) Fijian Consultant with Talanoa Consulting and Pew marine fellow said the term ‘gender-based’ is used when violence is shaped by  and expectations, power and status in society.

Read the full article at PHYS.org

This Is Why You Don’t See People-Size Salmon Anymore

March 13, 2018 — While the orcas of Puget Sound are sliding toward extinction, orcas farther north have been expanding their numbers. Their burgeoning hunger for big fish may be causing the killer whales’ main prey, Chinook salmon, to shrink up and down the West Coast.

Chinook salmon are also known as kings: the biggest of all salmon. They used to grow so enormous that it’s hard to believe the old photos now. Fishermen stand next to Chinooks almost as tall as they are, sometimes weighing 100 pounds or more.

“This has been a season of unusually large fish, and many weighing from 60 to 70 pounds have been taken,” The Oregonian reported in 1895.

Now, more than a century later, “it’s not impossible that we see individuals of that size today, but it’s much, much rarer,” University of Washington research scientist Jan Ohlberger says.

Ohlberger has been tracking the downsizing of salmon in recent decades, but salmon have been shrinking in numbers and in size for a long time. A century’s worth of dam-building, overfishing, habitat loss and replacement by hatchery fish cut the size of the average Chinook in half, studies in the 1980s and 1990s found.

Dam-building and fishing have tailed off, but Chinooks have been shrinking even faster in the past 15 years, according to a new paper by Ohlberger and colleagues in the journal Fish and Fisheries. Older and bigger fish are mostly gone.

Read the full story at KUOW

 

A Staggering Amount of Fish Is Wasted Each Year

June 28, 2017 — New research shows that industrial fisheries are responsible for dumping nearly 10 million tons of perfectly good fish back into the ocean each year—enough to fill 4,500 Olympic-sized swimming pools. This news comes at a time when nearly 90 percent of the world’s fish stocks are threatened by overfishing.

The research, published in the science journal Fish and Fisheries, shows that roughly 10 percent of the world’s annual catch is tossed back in the ocean. This waste happens for a number of reasons, including fishing practices that damage fish (making them unmarketable), throwing back fish that are too small or out of season, or because only part of the fish needs to be harvested (e.g. Alaska pollock roe). In some cases, fishers caught species they weren’t targeting (called bycatch), or they continue to catch fish even though they’ve caught enough, which they do in hopes of scooping up bigger fish (called high-grading).

“In the current era of increasing food insecurity and human nutritional health concerns, these findings are important,” noted Dirk Zeller, a researcher at the University of Western Australia, a senior research Partner with the Sea Around Us, and the lead author of the new study, in a statement. “The discarded fish could have been put to better use.”

For the study, the researchers examined the amount of fish that has been discarded over the past six decades. Estimates were made for all major fisheries around the world relying on, in the words of the authors, “a wide variety of data and information sources and on conservative assumptions to ensure comprehensive and complete time-series coverage.” Their analysis shows that five million tons of fish were discarded annually in the 1950s, a figure that skyrocketed to 18 tons annually by the late 1980s. This figure dropped to less than 10 million tons over the last decade.

Read the full story at Gizmodo

Missing fish catch data? Not necessarily a problem, new study says

September 27th, 2016 — Each day in fishing communities around the world, not every fish is counted. This happens in part because of illegal fishing, poor or incomplete surveys and discarded fish from commercial operations.

Recording how many fish are caught is one important requirement to measure the well-being of a fish stock — if scientists know the number of fish taken from the ocean, they can adjust management of that fishery to keep it from being overfished. Missing catch data, however, are rampant, causing concern that fisheries around the world are overfished.

A new study by University of Washington scientists finds that in many cases, this isn’t true. Specifically, misreporting caught fish doesn’t always translate to overfishing. The study was published online this month in the journal Fish and Fisheries.

“While quantifying total catch is important for understanding how much is removed from the system, it is possible to manage sustainably even if we don’t know those numbers,” said lead author Merrill Rudd, a UW doctoral student in aquatic and fishery sciences. “This paper shows there are some situations where, just because there is unreported catch, it doesn’t mean we are overfishing.”

The researchers modeled five different misreporting scenarios on a simulated fishery: complete reporting of catch numbers, constant over-reporting, constant under-reporting, increasing reporting rate over time and decreasing reporting rate over time. They found that in cases where misreporting was constant, the fish population could still be managed sustainably over the years because misreporting was proportional each year.

But in cases where misreporting increased or decreased year to year, those fisheries were found to be over- or under-fished.

In other words, the catch reporting trends — not the specific numbers of fish caught — are the most critical elements to consider when trying to understand a fishery’s overall status, the authors said.

Read the full story at UW Today