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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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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Bighead carp gill rakers

Toward a one-day conference devoted to the Gill-Oxygen Limitation Theory

Bighead carp gill rakers

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.

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