In addition, we ask the authorities to carry out the necessary controls to make sure regulations are obeyed. For all these reasons, we urge all fishermen to comply with the current regulations and we strongly recommend that they use capture techniques that minimize the negative impact on sharks. We want to express our concern regarding the irresponsible and illegal acts such as those shown in the above mentioned video, which, unfortunately, continue to occur every summer. The undersigned are Biological Sciences professionals who specialize in different aspects of the biology of sharks and other fish.
It is also advisable to use circle hooks, which are more prone to hook onto the mouth, minimizing sharks’ internal damage.
This grants them more chances of survival when being released. To prevent these injuries, responsible shark fishermen follow the recommendations of the current regulations and place a medium buoy (about the size of a grapefruit) about 25-30 cm from the hook to stop sharks from swallowing the hook. Consequently, the hook usually gets stuck in their internal organs (stomach, liver, esophagus, heart), causing serious injuries that question the survival of individuals returned to the water. The same applies to bait on fishing hooks. For this reason, sharks usually swallow their prey in one piece and do not feed on prey bigger than the size of their mouth. The sand tiger shark is a harmless species of shark that feeds on medium-sized fish (mainly hake, sea bass, narrownose smooth-hound, rays) and its teeth are not adapted to cutting prey in pieces. In fact, the population of this shark shared between Argentina, Brazil and Uruguay was listed as “ Critically Endangered” by the International Union for the Conservation of Nature, which is the main international organization dedicated to the evaluation and preservation of biodiversity. The latest scientific analysis indicates that the abundance of this species has decreased drastically in Argentina. The coasts of Buenos Aires are very important in the life cycle of this species, since it is believed that they mate in these waters, and that is fundamental for the preservation of the species. Once they reached the reproductive age, they give birth to two offspring, with a maximum frequency of once every two years. Female sharks reach their reproductive age at 14-15. The sand tiger shark, or “escalandrún”, is a shark of seasonal occurrence that moves between Argentina, Brazil and Uruguay, so it is affected by fishing activities in these three countries. They are based on scientific knowledge of the biology of these species in Argentine waters accumulated over many years, which indicate that these sharks have a very low reproductive rate and that their populations have suffered severe declines.
These regulations are intended to preserve and make sustainable use of large sharks populations of the Argentine Sea.
04/2013 of the Federal Fisheries Council is still valid, and it establishes that commercial fishing vessels can not land sharks longer than 1.6 meters in any Argentinian port. These regulations establish that captured sharks of the species sand tiger shark (Carcharias Taurus), Bacota (Carcharhinus brachyurus), Leopard (Notorynchus cepedianus), Hammerhead (Sphyrna zygaena) and Cazón (Galeorhinus galeus) have to be returned to the sea, limit the number of rods per fisherman and also stipulate how fishing rods should be assembled. In principle, the catch shown in the video is illegal because it violates Articles No. On January 11, a video showing what appear to be recreational fishermen in a rigid inflatable boat, with an illegal catch of 8 sharks of the species commonly known as sand tiger shark (Carcharias taurus) in waters off Mar Chiquita, province of Buenos Aires, was broadcasted by the media and in social media.
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