Articles and Interviews
Great white sharks known as great predators and fast swimmers are the opposite of basking sharks which have a languid lifestyle and are filter-feeding planktivores. But recent video footage analysis as shown that basking sharks the slowly swimmers can leap just as powerfully as great whites.
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Journal reference: Biology Letters, DOI: 10.1098/rsbl.2018.0537
Sharks and rays of Argentine waters - The sixth article
"The School Shark: an almost extinct shark in Argentine waters" in Spanish
(El Cazón: un tiburón casi extinguido)
in El Librito del Sur Nº6
A short resume from an article by Fernando Reis, SEI's executive director, published the 5th September 2018 on "EL LIBRITO DEL SUR" in Argentina:
According to the IUCN Red List, in the Southwest Atlantic the G. galeuspopulation is subject to intensive fishing throughout its distribution where this speciesis already considered Critically Endangered (CR), and without major and urgent management measures the situation for this shark species in the Southwest Atlantic is set to become even worse.
A shy species very appreciated in some kitchens,the School Shark (Galeorhinus galeus)spends his life moving between the coasts of Brazil and Argentina. Unfortunately, too many times, it ends up dried out for traditional Easter meals. It is a relatively small shark, which lives in coastal areas of temperate waters of all oceans but which is on the verge of extinction in Eastern South American waters.
At the global level, the Cazón G. galeus is classified in the IUCN Red List of Endangered Species of Extinction as a vulnerable species (code VU). However, according to the IUCN Red List and due to an unregulated overfishing in the Southwest Atlantic, the G. galeus population is already considered Critically Endangered (CR), and without major and urgent management measures the situation for this shark species in the Southwest Atlantic is set to become even worse.
The decreases registered along the last decades have been more notorious in Brazil and Uruguay; but, this important Houndshark continue to be fished without any restrictions. If these predatory sharks of South American Atlantic ecosystems disappear, they can cause serious declines in some species of commercial importance, just the opposite of what could be desired.
Without urgent measures, the situation in this area of the Atlantic will worsen until its final disappearance. To stop this, it's absolutely necessary to start immediately to limit the fishing of this shark species.
Special thanks to:
Alejo Irigoyen and Gastón Trobbiani- Researchers at the Center for the Study of Marine Systems (CESIMAR) and the National Council of Scientific and Technical Research (CCT CENPAT - CONICET), Puerto Madryn, Chubut, Argentina.
Sharks Educational Institute executive director Fernando Reis has been interviewed by Carla Rocha for the Renascenca Radio in Portugal within the international framework of the Shark Week 2018, on July 25.
Listen to the sound track in Portuguese, of the most substantiated excerpts of Fernando morning interview conducted by Carla Rocha, the well known Renascença Radio’s morning show presenter, in Portugal.
"The small Blotched Sandskate" in Spanish
(La pequeña Raya Reticulada)
in El Librito del Sur Nº5
A short resume from an article by Fernando Reis, SEI's executive director, published the 3rd August 2018 on "EL LIBRITO DEL SUR" in Argentina:
The Blotched Sandskate is a small skate, autochthonous species of the some characteristics sand bottoms on the Atlantic coasts of South America, that has a dorsal skin from sand beige to light brownish, with tiny darker spots on a rounded disc-shaped body.
On this article, Fernando Reis writes about the reasons for a changing on some menus of the Eastern South American people.
This is one of the situations that results when juveniles of a certain species begins to be fished continuously, year after year, in certain habitats. Without being able to grow up to its reproductive sexual maturation age, a species inevitably ends by being extinguished locally or even globally.
What happens in nature then, is very different from what happens in fisheries. The fishing industries start to target “new” species which previously were of non-commercial interest that they introduce into the market as a new product. A species of fish that before use to survived more or less unharmed, usually discarded when bycathed on bottom trawling of the first species. This is clearly the case of the Blotched Sandskate.
Fifth article of a series of shark diving thematic based, published in the new Argentine magazine "El librito del sur" with Special Thanks to:
Gustavo Chiaramonte – Chief of the Ichthyology Division and Director of the Hydrobiological Station of Quequén Port – Argentine Museum of Natural Sciences “Bernardino Rivadavia”, at Buenos Aires, Argentina;
Mariana Martins – Researcher at the University Estadual Paulista, at São Paulo, Brazil.