In the event, organized by the Facultad de Ciencias Ambientales y el Centro de Ciencias Ambientales (EULA) of the Universidad de Concepción (UdeC), with the support of the Millennium Nucleus MUSELS, the main findings of the research funded by Subpesca were exposed.
In order to show the results of the project that assessed the impact of the use of anti-parasite in coastal environments of the south-central Chile, the seminar entitled “antiparasitic products in the marine environment: Levels and effects on no-target organisms” was developed.
The meeting held at the Hotel Gran Pacífico of Puerto Montt, was part of the project “Evaluation and analysis of anti-parasitic products in the marine environment” funded by Fondo de Investigación Pesquera y de Acuicultura, FIPA, of the Subsecretaria de Pesca y Acuicultura, whose investment was $ 97.7 million.
During the meeting, the PI of the project and researcher at the Universidad de Concepción, Dr. Ricardo Barra, with the talk “Evaluation and analysis of antiparasitic products in the marine environment,” exposed the results of the study that lasted for more than a year and evaluated the impact of the use of antiparasitic in the areas of Llico in the region of Biobio and in the inland sea of the Chiloe Island.
The researcher, also part of the Millennium Nucleus MUSELS, said that “the results so far, indicate that probably, there is not a cause-effect relationships and that the concentrations of antiparasitic used by the national aquaculture did not have toxic effects on the different responses of the mussels “.
The research also included an analysis of the toxicity of certain pure and commercial products on some marine species, particularly on the Chilean mussel (Mytilus chilensis), on its capacity of fertilization, embryonic growth and fixation of larvae.
Similarly, the effects that pyrethroids may have on rates of clearance and ingestion of mussel larvae were addressed.
On the other hand, Dr. Felipe Tucca, a researcher at the Universidad de Concepcion, showed “Environmental risks of antiparasitic drugs in the marine environment,” said that in evaluations with larvae, no effects were observed in the reproduction and settlement, but effects in the intake and feeding rates were registered.
“However, the effects observed with these assays were made with higher concentrations than those detected in the environment. Then we have responses for high doses, but we determined through monitoring that the doses found in the environment would not be affecting to the animals. “He explains.
He also indicated that “one of the conclusions that we can obtain is that probably with this baseline we can start working to assess the effects at this level of concentration, with levels of concentration similar to those registered in the environment”.
Also participated in the meeting Dr. Cristian Vargas, a researcher at the Facultad de Ciencias Ambientales of the UdeC and Director of the Millennium Nucleus MUSELS, who referred to the “Impact of pyrethroids on clearance and ingestion rates of veliger larvae of Mytilus chilensis”; Dra. Camila Fernández, researcher at the CNRS-LIA Morfum and Centro Interdisciplinario de Investigación Acuícola (Incar) of the UdeC, with the talk “biogeochemical aspects of the use of pyrethroids in coastal environments of the southern central of Chile.”; and Dr. Enrique Bay Schmith, researcher at the Laboratory of Bioassays of Facultad de Ciencias Naturales y Oceanográficas de la UdeC, who addressed the topic of “caliguicidas toxicity on other marine species.”
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