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Evaluating a vertical slot fishway in the recolonization of upstream stretch of River Mondego that was not available to sea lamprey

2015; Frontiers Media; Volume: 2; Linguagem: Inglês

10.3389/conf.fmars.2015.03.00243

2296-7745

Esmeralda Duarte Pereira, Bernardo R. Quintella, Ana Telhado, Pedro R. Almeida,

Fish biology, ecology, and behavior

Event Abstract Back to Event Evaluating a vertical slot fishway in the recolonization of upstream stretch of River Mondego that was not available to sea lamprey Esmeralda D. Pereira1*, Bernardo R. Quintella1, 2, Catarina S. Mateus1, Carlos M. Alexandre1, Gabriela Cardoso1, Ana F. Belo1, Ana Telhado3, Maria F. Quadrado3 and Pedro R. De Almeida1, 4 1 MARE - Centro de Ciências do Mar e do Ambiente, Escola de Ciências e Tecnologia, Universidade de Évora, Portugal 2 Faculdade de Ciências, Universidade de Lisboa, Portugal, Departamento de Biologia Animal, Portugal 3 Agência Portuguesa do Ambiente, I.P., Departamento de Recursos Hídricos, Portugal 4 Escola de Ciências e Tecnologia, Universidade de Évora, Departamento de Biologia, Portugal In 2011, the construction of a vertical slot fishway at the Açude-Ponte dam in Coimbra, has allowed the migration of adult sea lampreys (Petromyzon marinus L.) to important upstream spawning areas that were unreachable for the last 30 years. In the present study, conventional radio and sensor (electromyogram) telemetry was used to evaluate the migratory behavior of 24 adult sea lampreys before, during and after fishway transposition. Data obtained from tracking campaigns was related with sea lamprey larvae (ammocoetes) relative abundance assessed annually with electrofishing at 34 sampling stations distributed along the River Mondego and main tributaries. Electrofishing surveys were performed during fishway pre (2011) and post-operational periods (2012-2014). In 2013, 30% of the radio-tagged sea lampreys surpassed the Açude-Ponte, taking a median time of 11 days since they first encounter the obstacle. Lampreys tagged with electromyogram transmitters took approximately 3 hours to complete the passage and during this period their critical swimming speed was exceeded for about 1% of the total transposition time, confirming the hydraulic suitability of the fishway for this particular species. The fishway efficiency resulted in a significant increases of ammocoetes on the upstream areas, with the species presence increasing in 15% of the sampling stations and abundances growing 8 times in the downstream stretch and 10 times in the upstream areas, between 2011 and 2014. By 2014, most of the ammocoetes captured upstream the Açude-Ponte dam belonged to the 0+, 1+ and 2+ age classes, and the high abundance of larvae observed in some sampling sites located in River Ceira confirms the importance of upstream tributaries for sea lamprey spawning and ammocoete beds. This information clearly shows that the fishway is contributing to an improvement of the longitudinal connectivity in River Mondego and to an increase in the available habitat for sea lamprey. Keywords: Fish passage, dams, Upstream migration, fishway monitoring, Passage efficiency, Telemetry, Recolonization, Sea lamprey Conference: XV European Congress of Ichthyology, Porto, Portugal, 7 Sep - 11 Sep, 2015. Presentation Type: Oral Presentation Topic: Life Cycles, Migration and Connectivity Citation: Pereira ED, Quintella BR, Mateus CS, Alexandre CM, Cardoso G, Belo AF, Telhado A, Quadrado MF and De Almeida PR (2015). Evaluating a vertical slot fishway in the recolonization of upstream stretch of River Mondego that was not available to sea lamprey. Front. Mar. Sci. Conference Abstract: XV European Congress of Ichthyology. doi: 10.3389/conf.FMARS.2015.03.00243 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 23 Dec 2015; Published Online: 24 Dec 2015. * Correspondence: MD. Esmeralda D Pereira, MARE - Centro de Ciências do Mar e do Ambiente, Escola de Ciências e Tecnologia, Universidade de Évora, Évora, Portugal, esmeralda.cdp@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Esmeralda D Pereira Bernardo R Quintella Catarina S Mateus Carlos M Alexandre Gabriela Cardoso Ana F Belo Ana Telhado Maria F Quadrado Pedro R De Almeida Google Esmeralda D Pereira Bernardo R Quintella Catarina S Mateus Carlos M Alexandre Gabriela Cardoso Ana F Belo Ana Telhado Maria F Quadrado Pedro R De Almeida Google Scholar Esmeralda D Pereira Bernardo R Quintella Catarina S Mateus Carlos M Alexandre Gabriela Cardoso Ana F Belo Ana Telhado Maria F Quadrado Pedro R De Almeida PubMed Esmeralda D Pereira Bernardo R Quintella Catarina S Mateus Carlos M Alexandre Gabriela Cardoso Ana F Belo Ana Telhado Maria F Quadrado Pedro R De Almeida Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.