Fishes

Rossi, Liliana; Cordiviola, Elly; Parma, Maria Julieta E.

doi:10.1007/978-3-540-70624-3_12

Cited by 21 publications

(11 citation statements)

References 26 publications

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“…As was discussed in Paolucci et al. (2009), it seems unlikely that the effect of larval fish predation may significantly reduce the standing stock of veligers found in the plankton at average ichthyoplankton densities of 3 larvae m −3 (Rossi, Cordiviola & Parma, 2007). According to that study, the mortality by predation is between 10 and 20% of the standing stock of veligers.…”

Section: Discussionmentioning

confidence: 98%

Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)

et al. 2010

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1. Larvae of 'sábalo', Prochilodus lineatus, whose adults represent over 60% of overall fish biomass in the Río de la Plata Catchment, have been observed to feed intensively on veligers of the exotic bivalve Limnoperna fortunei. 2. To assess the effects of this dietary shift on the growth of P. lineatus, 28-day laboratory experiments were carried out feeding newly hatched P. lineatus larvae with three diets: zooplankton artificially enriched with L. fortunei veligers; natural zooplankton; and zooplankton artificially enriched with cladocerans and copepods. The average length, weight and gut contents of the fish larvae were assessed weekly and metabolic rates of fish larvae were measured. 3. Proportions of veligers in gut contents were always higher than those in the experimental diet: 100, 76 and 21% for veliger-enriched, natural and low-veliger diets, respectively. Larvae fed a veliger-enriched diet grew to a significantly larger size than larvae fed the other two diets. In energetic balance comparisons using metabolic rates and prey energy content, all three diets were sufficient to support metabolism and growth. The greatest values of excess energy at the end of each week were in the veliger-enriched experiments. 4. Feeding on veligers of L. fortunei significantly enhances the growth of P. lineatus larvae and supports the idea that this new and abundant resource is selectively preyed upon by P. lineatus during its larval stage. Higher growth rates may stem from the higher energy contents of veligers compared to crustaceans and ⁄ or from the lower energy costs of capturing slower prey.

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Section: Discussionmentioning

confidence: 98%

Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)

et al. 2010

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“…Downstream from the confluence with the Paraguay River, the Paraná River reduces its slope and receives a large amount of sediment from Andean tributaries (Devercelli & O'Farrell, ). This drives the development of a large floodplain about 20–30 km wide and 1000 km long, with great habitat heterogeneity (Amsler et al ., ; Rossi et al ., ). The region receives annual rainfall of 1000 mm, largely concentrated in austral summer and autumn.…”

Section: Methodsmentioning

confidence: 99%

Ecological and phylogenetic determinants of life‐history patterns among ten loricariid species

Mas

Alvarenga

Scarabotti

2019

Journal of Fish Biology

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We analysed the influence of ecological factors, phylogenetic history and trade‐offs between traits on the life‐history variation among 10 loricariid species of the middle Paraná River. We measured eight life‐history variables and classified the life‐history strategies following the equilibrium–periodic–opportunistic (EPO) model. Principal‐component analysis of life‐history traits segregated species along a gradient from small opportunistic (low fecundity, low parental investment) to large equilibrium (low‐medium fecundity, high parental investment) species. A clear periodic strategist was absent in the analysed assemblage. Variation partitioning by canonical phylogenetic ordination analysis showed both a component of variation uniquely explained by phylogenetic history (PH; 32.2%) and a component shared between PH and ecological factors (EF; 37%). The EPO model is a useful tool for predicting correlations among life‐history traits and understanding potential demographic responses of species to environmental variation. Life‐history patterns observed throughout Loricariidae suggests that this family has diversified across all three endpoint strategies of the EPO model. Our study indicates that evolutionary lineage affiliation at the level of subfamily can be a strong predictor of the life‐history strategy used by each species.

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“…Periodically, long‐lasting and intense flood pulses inundate vast floodplain areas that play a key role in fish community dynamics. Productivity, reproduction, recruitment and the diversity of fish populations are positively affected when floodplain connectivity increases due to hydrological inundation events (Górski et al, 2013; Rossi, Cordiviola, & Parma, 2007; Winemiller, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…In its middle reach (locally called the Middle Paraná River, MPR), the main channel with its floodplain comprises a complex and dynamic ecosystem with heterogeneous lotic/lentic environments. The river is inhabited by numerous fish species (~240 native species; Rossi et al, 2007), but dominated by around 20 species of commercial value (Espinach Ros et al, 2012). The bulk of freshwater fisheries in Argentina is concentrated in this reach (Espinach Ros et al, 2012; Fuentes & Quirós, 1988).…”

Section: Introductionmentioning

confidence: 99%

The influence of hydro‐climatic and anthropogenic effects on the long‐term variation of commercial fisheries in a large floodplain river

Rabuffetti

Espínola

Abrial

et al. 2020

River Research & Apps

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This study deals with the effects of climate fluctuations and anthropogenic impacts on fisheries of Paraná River over the last 100 years. It is the first attempt to appraise the influence of hydro‐climatic and anthropogenic variables on the population changes of the most important inland fisheries of Argentina. Datasets covering more than eight decades (1935–2016) of a number of frequent and abundant commercial species inhabiting the main channel as well as the large floodplain of Paraná River were used. Our results suggest that fish catches and structure changed over time. Long and short‐term changes and reductions were closely related to fluctuations of 18 hydro‐climatic variables. Positive effects on the ichthyofauna were recorded during humid periods (1930–1940 and 1970–2000), when the frequency of large spring–summer floods increased. An increase in anthropic impacts (accounted for with nine variables) were recorded during the last two decades. We highlight the usefulness of the approach to support the management of the resources, ensuring sustainability of commercial fish assemblages and the long‐term conservation of biodiversity in big rivers.

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Fishes

Cited by 21 publications

References 26 publications

Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)

Veligers of an introduced bivalve, Limnoperna fortunei, are a new food resource that enhances growth of larval fish in the Paraná River (South America)

Ecological and phylogenetic determinants of life‐history patterns among ten loricariid species

The influence of hydro‐climatic and anthropogenic effects on the long‐term variation of commercial fisheries in a large floodplain river

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