Tag: Sea Around Us

A pair of One-spot Pullers (Chromis hypsilepis) preparing to spawn. Home Bommie, Ulladulla, NSW. Photo by Richard Ling, Flickr, CC BY-NC-ND 2.0.

Most female fish grow bigger than the males: deal with it!

A pair of One-spot Pullers (Chromis hypsilepis) preparing to spawn. Home Bommie, Ulladulla, NSW. Photo by Richard Ling, Flickr, CC BY-NC-ND 2.0.

A pair of One-spot Pullers (Chromis hypsilepis) preparing to spawn. Home Bommie, Ulladulla, NSW. Photo by Richard Ling, Flickr, CC BY-NC-ND 2.0.

In over 80 per cent of fish species, the females, including those known as ‘big old fecund females,’ or BOFFS, grow bigger than the males. This long-established fact is difficult to explain with the conventional view of fish spawning being a drain on the ‘energy’ available for growth. If this view were correct, females, which are defined by their larger reproductive effort, would always remain smaller than males.

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Nukunonu Lagoon in Tokelau. Photo by CloudSurfer, Wikimedia Commons.

Fishing pressure and climate change challenge Tokelau’s food security

Nukunonu Lagoon in Tokelau. Photo by CloudSurfer, Wikimedia Commons.

Nukunonu Lagoon in Tokelau. Photo by CloudSurfer, Wikimedia Commons.

Tokelau’s fish-dependent population may be at risk of seeing its main source of locally available animal protein dramatically reduced if the amounts and species of fish caught by local fishers in their waters stay the same or increase.

According to a study by researchers with the Sea Around Us initiative at the University of British Columbia and the Sea Around Us – Indian Ocean at the University of Western Australia, a small-scale, commercial or artisanal fishery that has been growing since it began in the early 2000s, combined with an expanding foreign industrial fishery that catches most of the offshore fish in the territory’s exclusive economic zone, may threaten people’s access to fresh seafood.

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Facing extinction- African penguin- Photo by David Grémillet.

Industrial fisheries are starving seabirds all around the world

Facing extinction- African penguin- Photo by David Grémillet.

Facing extinction- African penguin- Photo by David Grémillet.

Industrial fisheries are starving seabirds like penguins and terns by competing for the same prey sources, new research from the French National Center for Scientific Research in Montpellier and the Sea Around Us initiative at the University of British Columbia has found.

In a study published today in Current Biology, researchers found that annual seabird food consumption decreased from 70 to 57 million tonnes between 1970 and 2010. Meanwhile, fisheries increased their catches of potential seabird prey from an average of 59 million tonnes in the 1970s and 80s to 65 million tonnes per year in recent years.

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Menhaden fisheries in Louisiana, USA. Photo by Louisiana Sea Grant College Program Louisiana State University, Flickr, CC BY 2.0.

Fishing companies lose millions of dollars every year and they don’t know it

Menhaden fisheries in Louisiana, USA. Photo by Louisiana Sea Grant College Program Louisiana State University, Flickr, CC BY 2.0.

Menhaden fisheries in Louisiana, USA. Photo by Louisiana Sea Grant College Program Louisiana State University, Flickr, CC BY 2.0.

Fishing companies operating worldwide are missing between $51 billion and $83 billion in unrealized net economic benefits every year due to the overexploitation and underperformance of fish stocks. For these fishing companies, that means they are spending too much and getting fewer fish, revenues and profits than they could.

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