Variación de la Actividad Reproductiva del Sábalo, Prochilodus Lineatus (Valenciennes, 1847), Estimada por el Flujo de Larvas en el Río Paraná Inferior

Fuentes, C. M.; Ros, A. Espinach

doi:10.14409/natura.v1i29.3846

Cited by 11 publications

(18 citation statements)

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“…The ichthyoplankton of the Paraná River was primarily comprised of Characiformes (45%) and Siluriformes (55%), which agrees with previous information (Fuentes & Espinach Ros, 1998, reported that Characiformes and Siluriformes make up 81% of the fish fauna of the Paraná ). In the marginal lagoons, on the other hand, Characiformes were largely dominant (89%).…”

Section: Discussionsupporting

confidence: 91%

“…This contrast agrees with the known behavior of P. lineatus: adult sá balo spawn in the Paraná River channel and their larvae migrate toward marginal lagoons while utilizing their vitellum. Active feeding begins once they have reached these lagoons (Welcomme, 1979;Fuentes & Espinach Ros, 1998). On the other hand, catfishes (Pimelodidae), which also reproduce chiefly in the Paraná River channel, start feeding in the channel shortly after hatching.…”

Section: Discussionmentioning

confidence: 99%

“…1994 and 2004 (Boltovskoy et al, 2006). However, not only adult fish seem to have benefited from the bivalve: the planktivorous larvae and juveniles of several fish species (Rossi, 1992(Rossi, , 2001Fuentes & Espinach Ros, 1998) may also benefit from very high densities of L. fortunei veligers. This assumption is supported by European and North American surveys on the zebra mussel, Dreissena polymorpha, an invasive bivalve that shares several salient biological and ecological traits with L. fortunei (Karatayev et al, in press).…”

Section: Introductionmentioning

confidence: 99%

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Larvae of the invasive species Limnoperna fortunei (Bivalvia) in the diet of fish larvae in the Paraná River, Argentina

et al. 2007

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To assess the trophic impact of the planktonic larvae of the invasive Asian bivalve Limnoperna fortunei, introduced in South America around 1990, we investigated the gut contents of fish larvae collected at monthly intervals between October 2000 and March 2001 at three locations along a 600 km stretch of the Paraná River, and during November 2004 in two areas of marginal lagoons connected to the river near the city of San Nicolá s, Argentina. Zooplankton was also collected in the lagoons in 2004. In total, 11,956 fish larvae were retrieved, of which 1,511 were used for detailed analyses. Of the 15 fish taxa collected, 11 had veligers of L. fortunei in their gut. Fish larvae with empty guts represented 60% (San Nicolá s) to 72% (Paraná River) of the total number of fish. Proportions of feeding fish larvae with L. fortunei veligers in their guts varied between 20% (San Nicolá s) and 56% (Paraná River); in 15% of the guts analyzed, L. fortunei was the only food item recorded. For those specimens that had consumed L. fortunei larvae and any other food item, L. fortunei was the most important item in 55% (Paraná River) to 71% (San Nicolá s) of the animals in terms of biomass. No major temporal or spatial changes in the diet were observed along the Paraná River, but the relative biomass contribution of L. fortunei larvae differed strongly in fishes of different developmental stage. In protolarvae and mesolarvae, veligers accounted for 30-35% of the gut contents. In metalarvae, veligers accounted for only 3%, indicating enhanced food supply for the earliest fish life stages. Comparison of the relative proportions of the three main zooplankton types (L. fortunei veligers, cladocerans, and copepods) in the water and in larval fish guts indicates that L. fortunei is always selected positively over the other two prey types. While our results strongly suggest that the expansion of L. fortunei results in an enhanced food supply for local fish populations, they do not necessarily imply that Handling editor: S. M. Thomaz the overall effect on the ecosystem in general, and on the fish fauna in particular is beneficial.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Larvae of the invasive species Limnoperna fortunei (Bivalvia) in the diet of fish larvae in the Paraná River, Argentina

et al. 2007

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“…Habitat hydrological indicators. A comprehensive understanding of the changes that have occurred in the sábalo fishery must also take into account the hydrological conditions as they influence on the larvae abundance (Fuentes & Espinach Ros, 1998) and availability of nursery areas and recruitment . Between 1972 and 1999 the Paraná basin experienced extremely wet conditions, particularly during the years 1982-1983 and 1997-1998 when very strong El Niño events took place.…”

Section: Discussionmentioning

confidence: 99%

Assessment of sábalo (Prochilodus lineatus) fisheries in the lower Paraná River basin (Argentina) based on hydrological, biological, and fishery indicators

Baigún

Minotti

Oldani³

2013

Neotrop. ichthyol.

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This study assesses the change in fish exploitation patterns of the sábalo fisheries of the lower Paraná River basin based on hydrological, biological, and fishery indicators. From historical catch records, we recorded a shift from a lightly and moderate exploited status before 2001 to a heavily exploited one, as a result of the development of sábalo exports from 2001 onwards.Channel and floodplain connectivity indices demonstrated that the Paraná exhibited highly favorable hydrological conditions between 1972 and 1999 but more adverse conditions from 1999 to 2009, as a consequence of flood pulses reduction coincident with a fishing mortality increment. A total catch of 15,000 tons, including local consumption, regional market, informal sales, and exportation volumes, was estimated as the maximum sustainable catch. That level was instead exceeded 3 fold in 2004, in parallel with a decrease in the mean fish length from 48 to 42 cm, along with a reduction in both the mesh size from 16 to 12 cm and megaspawner proportion, and an increase of fishing mortality. Although growth overfishing was not noted, an analysis of the spawning potential ratio trend indicated that recruitment overfishing took place during 2005, since the fishing mortality rate was 4 times greater than the natural mortality rate. These observations suggest that less favorable hydrological conditions after 1999 coupled with a coincident high fishing pressure could have impacted the sábalo population biomass. Management of sábalo fisheries requires to set aside a single economic vision of the resource use moving to an ecosystem-oriented approach that incorporate, among others components, the hydrological regime, species life history traits, fishing impacts on other species, and main stakeholders socioeconomic requirements as key elements for the preservation of fishery sustainability.Este estudio evalúa el cambio en los patrones de explotación de las pesquerías de sábalo (Prochilodus lineatus) en la baja cuenca del río Paraná basado en indicadores hidrológicos, biológicos y pesqueros. A partir de registros históricos de capturas se notó un desplazamiento de un estado de explotación ligera o moderada previa a 2001 a otro de explotación intensiva como resultado del desarrollo de una pesquería para exportación a partir de ese año. Los índices de conectividad hidrológica demostraron que el Paraná exhibió condiciones muy favorables para el sábalo entre 1972 y 1999, pero más adversas entre 1999 y 2009 al reducirse el caudal, que coincidió con un aumento en la mortalidad por pesca. Se estimó en 15.000 toneladas la captura máxima sostenible, incluyendo tanto la destinada al consumo local, venta informal y en mercados regionales, como la asignada a exportación. Este nivel, sin embargo, se triplicó en 2004, siendo acompañado por una disminución de la talla media y máxima de captura de 48 a 42 cm y de 64 a 58 cm respectivamente, una reducción de abertura de malla de 16 a 12 cm y un descenso en la proporción de megareproductores. Aun cuando no se detectó sobrepe...

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“…De estudios enfocados en la dinámica del ictioplancton en ríos en América Latina, pueden citarse los trabajos de ARAUJO-LIMA & OLIVEIRA (1998) para el Amazonas, en el embalse de Itaipú en la cuenca alta del río Paraná (NAKATANI et al, 1993), en la cuenca baja del río Paraná (OLDANI., 1990;OLDANI et al, 1992), en el delta del río Paraná (FUENTES & ESPINACH ROS, 1998;BIALETZKI et al, 1999;GONZÁLEZ et al, 2010) y en zonas de inundación de este río principalmente en lagos marginales con diferentes grados de conectividad (BAUMGARTNER et al, 2004(BAUMGARTNER et al, , 2008SALETE et al, 2009), en el río Ivinhema en Brasil (REYNALTE-TATAJE et al, 2011) y en el río Magdalena (JIMÉNEZ-SEGURA, 2007;PAREJA-CARMONA et al, 2014).…”

Section: Icthyoplankton In the Ayapel Floodplain Lake San Jorge Riveunclassified

Ictioplancton en La Ciénaga De Ayapel, Río San Jorge (Colombia): Cambios Espacio-Tempo

Ochoa

Jiménez

Palacio

2015

bccm

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Variación de la Actividad Reproductiva del Sábalo, Prochilodus Lineatus (Valenciennes, 1847), Estimada por el Flujo de Larvas en el Río Paraná Inferior

Cited by 11 publications

References 0 publications

Larvae of the invasive species Limnoperna fortunei (Bivalvia) in the diet of fish larvae in the Paraná River, Argentina

Larvae of the invasive species Limnoperna fortunei (Bivalvia) in the diet of fish larvae in the Paraná River, Argentina

Assessment of sábalo (Prochilodus lineatus) fisheries in the lower Paraná River basin (Argentina) based on hydrological, biological, and fishery indicators

Ictioplancton en La Ciénaga De Ayapel, Río San Jorge (Colombia): Cambios Espacio-Tempo

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