Secretive sharks of the open ocean

Blue stretched down as far as could be seen, illuminated by shifting shafts of down-welling light. Gazing down through this drop in the ocean I’d expected to see something, but nothing moved across the void, nor had it for hours. A container ship, like a skyscraper on its side, churned past us a few miles away. Then from the deep a shape glanced across the corner of my eye, there and not there at the same time. Coming back into view, a sleek, torpedo shape with a sinuous movement, well camouflaged against the inky backdrop: it was a large blue shark.

Author:
David Sims
Category:
Megafauna

Evolution of the pelagic ecosystem: a history written in tiny teeth

Author:
Elizabeth Sibert
Category:
Megafauna
Ecosystem
Evolution

Fish poo and the climate challenge

Angela Martin looks at the science behind the headlines
Author:
Angela Martin
Category:
Megafauna
Biogeochemical cycling
Climate change & Ocean acidification
Marine policy
Atlantic Bluefin Tuna

Moving sushi

Following the dramatic appearance of a large bluefin tuna shoal off the coast of Cornwall,UK, this article summarises the history of bluefin fisheries and discusses possible reasons for this unusual occurrence.  

Author:
Tom Horton
Category:
Fishing & aquaculture
Megafauna
killer whales 2

The killer whales of the North Atlantic

Our understanding of killer whale ecology and evolution has come a long way in the last 25 years, but, as Andrew Foote and colleagues explain, there are still many gaps in our knowledge.
Author:
Andrew Foote, Sanna Kuningas and Filipa I. P. Samarra
Category:
Megafauna
technology
Genetics and molecular research

Growing white shark populations in US waters – a sign of ecosystem recovery?

Evidence provided by an army of scientist about the environment health of California’s surrounding oceans from 1920 to 1990 lead to major federal and state legislation. Chris Lowe details the history of this process which resulted in improvements in water quality and fisheries management allowing the growth in white shark and other top predator populations.

Author:
Chris Lowe
Category:
Fishing & aquaculture
Megafauna
Habitat protection and loss
Picture of angelshark

Oceans of change

Callum Roberts provides a detailed account of the history of local fisheries and its general decline since the 1930’s. From historic devastating effects of overfishing and trawling to modern plastics and synthetic chemicals this article outlines problems and possible solutions to protecting the balance of conservation and the fishing industry.

Author:
Callum Roberts
Category:
history
Fishing & aquaculture
Marine policy
Megafauna