PERU fishing with guts to report…
The brightness of the moon affects bycatch of loggerhead sea turtle (Caretta caretta) in night sets during the Fishing Albacore in the western Mediterranean Sea, according to a study by the Spanish Institute of Oceanography (IEO).
To reach this conclusion, researchers at the Oceanographic Centre of Malaga analyzed 138 IEO night fishing operations where 273 loggerhead sea turtle specimens were captured in 437,393 observed hooks.
Previous studies suggested that there is a direct relationship between the increase in catches and the brightness of the moon. But this new study shows a relationship in the opposite direction: the higher luminosity, children are loggerhead sea turtle captures.
Scientists assume that increasing the brightness of the line exposure to other scavengers like the dogs or squid increases, and that this competition could not find turtles hooks available.
While the loggerhead sea turtle is able to follow the chemical trail of bait is very efficient in finding the bait when you have low light, the authors of the research published in the Bulletin of the Association of Spanish Herpetology.
So catch this animal are concentrated significantly in day hauls.
IEO experts also studied the influence of the tides in the catches of turtles.
“This analysis shows a higher probability of capture during spring tides, although in the Mediterranean are of low amplitude, the currents change which may affect the behavior of the turtles”Explains the team.
Furthermore, a study by experts from the Department of Animal Biology and Biodiversity Research Institute (IRBio), University of Barcelona shows that when fishermen try to cut the fishing line without raising the animal on board and return to the Sea about 40% of the turtles died months later.
In this study we follow it up with telemetry transmitters for satellite group loggerhead turtles released into the sea after being caught by longline vessels in the Spanish Coast RTVE reported.
According to Lluís Cardona, Professor and Member of the Large Marine Vertebrates Research Group of the UB, “Turtle thread that runs through the digestive tract until the end goes down the drain swallows: the taut wire can ulcerate the internal organs, and this is what kills animals”.
The researcher explains that this impact could be reduced by half if the turtles accidentally hooked on longlines are brought on board with the help of a landing net, then catch the yarn is cut just behind the hook.
The loggerhead sea turtle is the most abundant sea turtle in the Mediterranean but also one of the most threatened in the world.
Their main nesting beaches are found on the coasts of North America, Brazil, Japan, Oman, Australia, Cape Verde and the eastern Mediterranean (especially Greece, Turkey, Cyprus and Libya).
SOURCE: Fis.com
