Tag: Gill Oxygen Limitation Theory

Cover of the Journal of Fish Biology. June 2024.

Paper on gigantism makes cover of Journal of Fish Biology

Cover of the Journal of Fish Biology. June 2024.

Cover of the Journal of Fish Biology. June 2024.

A recent paper authored by the Sea Around Us’ PI, Dr. Daniel Pauly, research assistant, Elaine Chu, and Dr. Johannes Müller from Leiden University, has made the cover of the June print issue of the Journal of Fish Biology, where it was introduced by a brief essay in the ‘Between the Covers’ section. The image that illustrates it is that of a large mythical sea creature known as an Aspidochelone, which appeared in a French bestiary around 1270 A.D.

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Forty-year-old concepts around fish respiration regain prominence in light of climate change

Forty-year-old concepts around fish respiration regain prominence in light of climate change

Forty-year-old concepts around fish respiration regain prominence in light of climate change

Common carp. Photo by Bernard Spragg. NZ, Wikimedia Commons.

Before Dr. Daniel Pauly, now the principal investigator of the Sea Around Us initiative at the University of British Columbia, became a doctoral student, he spent two years doing fisheries work in Indonesia.

Having done his academic studies in Germany, he was surprised to discover a near absence of information on the growth of tropical fish. Thus, upon his return to Kiel University’s Institute of Marine Sciences, he decided to find out how fish grew; the idea was that if general patterns emerged, they could be applied to the many species in Indonesia and elsewhere in the tropics.

His doctoral dissertation was, consequently, built around identifying the factors that govern fish growth.

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Blacktip reef shark

Marine sharks and rays ‘use’ urea to delay reproduction

Blacktip reef shark

Blacktip reef shark. Photo by Ray in Manila, Flickr.

Urea – the main component of human urine – plays an important role in the timing of maturation of sharks, rays and other cartilaginous fish.

A new study by researchers with the Sea Around Us initiative at the University of British Columbia’s Institute for the Oceans and Fisheries found that high urea concentrations common in cartilaginous fish, particularly oviparous marine species, allow them to mature and begin to reproduce at a larger fraction of their maximal size.

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