In his quest to provide support to his Gill Oxygen Limitation Theory, the Sea Around Us PI, Dr. Daniel Pauly, has written a short foreword to the 1974 chapter “The Tactics and Strategy of Growth in Fishes” published by Derek Iles in the book Sea Fisheries Research.
Herring spawn. Photo by Moosealope, Flickr.
The physical relief that temperate fish like cod and Atlantic herring experience after they spawn for the first time allows them to breathe in more oxygen and develop a voracious appetite, all of which leads to a rapid increase in body weight.
Bighead carp gill rakers. Photo by Invasive Carp Regional Coordinating Committee, Flickr.
At the last annual meeting of the FishBase Consortium, held 5-7 September 2023 in Tervuren, Belgium, it was decided that the next FishBase/SeaLifeBase Symposium, traditionally held before the FishBase Consortium meeting, to be held in early September 2024 in Thessaloniki, Greece, would last two days, with the first devoted to a session on the Gill-Oxygen Limitation Theory, or GOLT.
Reference image of dead fish washed ashore during a golden algae toxic bloom. Photo by Michael Hooper, USGS.
Climate change-induced droughts and fish kills affect larger fish more severely than smaller individuals, according to new research.
In a paper published in Environmental Biology of Fishes, researchers from Leiden University, Sportvisserij Zuidwest Nederland and the Sea Around Us initiative at the University of British Columbia compared evidence from drought-induced fish kills in the Netherlands, fisheries management literature and multiple physiological studies. They confirmed that when water gets warmer and deoxygenated, larger and older individuals within a species tend to die in greater numbers than their smaller and younger counterparts.
Black and white snapper in the Red Sea, Egypt. Photo by Derek Keats, Wikimedia Commons
Warmer water than that to which a fish is used becomes an aggressor of sorts that impacts internal biochemical processes and forces the fish to stop growing at a smaller size than it would normally do in optimal habitat conditions, new research shows.