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| Registros recuperados: 14 | |
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| Antonio,Rosimeire Ribeiro; Agostinho,Angelo Antonio; Pelicice,Fernando Mayer; Bailly,Dayani; Okada,Edson Kioshi; Dias,João Henrique Pinheiro. |
| The present study explored the interaction between the upriver migration of fish and the blockage of their migration routes by dam construction. Specifically, we studied (i) the capacity of migratory fish to locate alternative routes in the presence of an obstacle, and (ii) the behavior of the fish after they were artificially transferred to the reservoir. With the use of the mark-recapture technique (tagging), the study was carried out near Porto Primavera Dam (UHE Engenheiro Sérgio Motta) between 1994 and 1999, a period prior to the closure of the floodgates and the installation and operation of the fish pass facilities. The fish were caught in the dam forebay downstream, marked with LEA type tags, and released upstream (5113 individuals; 14 species) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish migration; Fish pass; Tagging; Paraná River; Porto Primavera Reservoir. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200012 |
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| Brochier, Timothee; Auger, Pierre-amael; Pecquerie, Laure; Machu, Eric; Capet, Xavier; Thiaw, Modou; Mbaye, Baye Cheikh; Braham, Cheikh-baye; Ettahiri, Omar; Charouki, Najib; Sene, Ousseynou Ndaw; Werner, Francisco; Brehmer, Patrice. |
| Small pelagic fish (SPF) species are heavily exploited in eastern boundary upwelling systems (EBUS) as their transformation products are increasingly used in the world food chain. Management relies on regular monitoring, but there is a lack of robust theories for the emergence of the populations’ traits and their evolution in highly variable environments. This work aims to address existing knowledge gaps by combining physical and biogeochemical modelling with an individual life-cycle based model applied to round sardinella (Sardinella aurita) off northwest Africa, a key species for regional food security. Our approach focused on the processes responsible for seasonal migrations, spatio-temporal size-structure, and interannual biomass fluctuations.... |
| Tipo: Text |
Palavras-chave: Small pelagic fish; Sardinella aurita; Fish migration; Eastern boundary upwelling system; Individual based biophysical models; Dynamic energy budget. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00433/54433/56088.pdf |
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| Fernandez,Domingo Rodriguez; Agostinho,Angelo Antonio; Bini,Luis Mauricio; Pelicice,Fernando Mayer. |
| In this study, we evaluated the fish ascent in the experimental ladder at Itaipu Reservoir (Paraná State, Brazil), in relation to diel variation, fish size, reproductive stages and species composition. The study was carried out from October, 1995 to February, 1996 and from November, 1996 to January, 1997 at two points on the ladder (boxes at heights of 10 and 27 m). Twenty-two species were recorded, and Prochilodus lineatus, Pimelodus maculatus, Leporinus obtusidens, Schizodon borellii and Leporinus friderici accounted for 86.6 % of the total catch. Fish length did not differ between diel periods and boxes. On the other hand, fish abundance of the main species was significantly influenced by box position, reproductive stage and diel period. The higher box... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish migration; Fish passage; Selectivity; Non-reproductive fish; Management. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200016 |
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| Fernandez,Domingo Rodrigues; Agostinho,Angelo Antonio; Bini,Luis Maurício; Gomes,Luiz Carlos. |
| We evaluated the seasonality of the ascent of fish in an experimental ladder located close to Itaipu Dam, and its relationships to reproduction, temperature, river level and discharge. Samplings of fish and measurements of abiotic factors were performed from February, 1995 through January, 1997, in two resting pools of the ladder. Pool A was located 10 m above the mean level of the Paraná River; Pool B was located at the upper end of the ladder, at a height of 27 m. Autoregressive models were used to remove the temporal dependence between observations. Residuals of the models were used to relate, using Pearson's correlation coefficient, the densities of fish to the environmental variables. Clear patterns of seasonality were observed for temperature. River... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish ladder; Fish migration; Environmental factors; Paraná River. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200009 |
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| Burns,Marcelo D. M.; Garcia,Alexandre M.; Vieira,João P.; Bemvenuti,Marlise A.; Marques,David M. L. Motta; Condini,Vinicius. |
| The communication between the Patos and Mirim lagoon systems occurs via a natural channel called São Gonçalo. In 1977, a dam was built in this channel to prevent entrance of saline waters from Patos Lagoon estuary into the Mirim Lagoon. Our results showed an abrupt discontinuity in salinity and fish species distribution along the study sites. Sites below the dam showed salinity values higher than zero, whereas sites above had zero salinity values across all sampling periods. Marine and estuarine fishes (e.g., mullets Mugil platanus, M. curema, silversides Odontesthes argentinensis, Atherinella brasiliensis, sardine Brevoortia pectinata, and white croaker Micropogonias furnieri) were not captured above the dam. If these juvenile fishes could enter the Mirim... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dam; Fish migration; Artisanal fishery; Estuary. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100006 |
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| Agostinho,Angelo Antonio; Agostinho,Carlos Sergio; Pelicice,Fernando Mayer; Marques,Elineide Eugênio. |
| Fish ladders are a strategy for conserving biodiversity, as they can provide connectivity between fragmented habitats and reduce predation on shoals that accumulate immediately below dams. Although the impact of predation downstream of reservoirs has been investigated, especially in juvenile salmonids during their downstream movements, nothing is known about predation on Neotropical fish in the attraction and containment areas commonly found in translocation facilities. This study analysed predation in a fish passage system at the Lajeado Dam on the Tocantins River in Brazil. The abundance, distribution, and the permanence (time spent) of large predatory fish along the ladder, the injuries imposed by piranhas during passage and the presence of other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dam; Fish migration; Fish pass; Piscivores; Serrasalmus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400001 |
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| Moore, Jean-sebastien; Harris, Les N.; Le Luyer, Jeremy; Sutherland, Ben J. G.; Rougemont, Quentin; Tallman, Ross F.; Fisk, Aaron T.; Bernatchez, Louis. |
| Migration is a ubiquitous life history trait with profound evolutionary and ecological consequences. Recent developments in telemetry and genomics, when combined, can bring significant insights on the migratory ecology of non-model organisms in the wild. Here, we used this integrative approach to document dispersal, gene flow and potential for local adaptation in anadromous Arctic Char from six rivers in the Canadian Arctic. Acoustic telemetry data from 124 tracked individuals indicated asymmetric dispersal, with a large proportion of fish (72%) tagged in three different rivers migrating up the same short river in the fall. Population genomics data from 6,136 SNP markers revealed weak, albeit significant, population differentiation (average pairwise FST =... |
| Tipo: Text |
Palavras-chave: Arctic; Conservation; Fish migration; Fishery management; Genotyping by sequencing; Population genomics; RADseq. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00409/52049/52719.pdf |
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| Fernandez,Domingo Rodriguez; Agostinho,Angelo Antônio; Bini,Luis Mauricio. |
| The specific selection of a weir and orifice type experimental fish ladder in the dam of the Itaipu Reservoir (Paraná River) was evaluated by samplings in the river downstream and at two points along the ladder (at heights of 10 m and 27 m) during 28 months. Among the 65 species recorded in the river (immediate downstream of the dam), 27 were captured on the ladder. The species that showed highest density on the ladder, the majority migratory, were moderately, or only slightly, abundant downstream. Among the most abundant species downstream, only one, non-migratory, was recorded in the ladder. The structure presented a negative selection in relation to large migratory pimelodids that might be overcome by enlarging the scale of its design. The sampling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish ladder; Fish migration; Selectivity; Fish transposition; Reservoir. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400012 |
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| Melo,Bruno F.; Sato,Yoshimi; Foresti,Fausto; Oliveira,Claudio. |
| The rio São Francisco basin contains many endemic species, such as Prochilodus argenteus and P. costatus, which have great commercial importance. However, information about the main recruitment sites and genetic studies containing extensive sampling of these species are scarce. To investigate the roles of the marginal lagoons in the maintenance of genetic variability and in the population structure, we analyzed six microsatellite loci in nine sampling groups of P. argenteusand five sampling groups of P. costatus. Our results showed high levels of genetic variability and low values of genetic differentiation for P. argenteus (FST =0.008, P< 0.05) and for P. costatus(FST =0.031, P < 0.05). In addition, high values of gene flow combined with a small... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation genetics; Fish migration; Microsatellite; Nursery area; Rio São Francisco basin. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300625 |
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| Darnaude, Audrey M.; Hunter, Ewan. |
| The oxygen isotopic ratio of fish otoliths is increasingly used as a 'natural tag' to assess provenance in migratory species, with the assumption that variations in delta O-18 values closely reflect individual ambient experience of temperature and/or salinity. We employed archival tag data and otoliths collected from a shelf-scale study of the spatial dynamics of North Sea plaice Pleuronectes platessa L., to examine the limits of otolith delta O-18-based geolocation of fish during their annual migrations. Detailed intra-annual otolith delta O-18 measurements for 1997-1999 from individuals of 3 distinct sub-stocks with different spawning locations were compared with delta O-18 values predicted at the monthly, seasonal and annual scales, using predicted... |
| Tipo: Text |
Palavras-chave: Fish migration; Oxygen; Stable isotopes; Natural tag; Site fidelity; Plaice; Pleuronectes platessa. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00626/73782/75084.pdf |
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| Registros recuperados: 14 | |
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