Long-term Hydrologic Variability in a Large Subtropical Floodplain River: Effects on Commercial Fisheries

Rabuffetti, Ana Pía; Górski, Konrad; Espínola, Luis A.; Abrial, Elie; Amsler, Mario L.; Paira, Aldo R.

doi:10.1002/rra.3100

Cited by 16 publications

(20 citation statements)

References 23 publications

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“…As it is commonly observed in large river floodplains (e.g. Agostinho et al 2003;Górski et al 2011;Rabuffetti et al 2017), the occurrence of a large spring-summer flood is the condition most suitable for the different reproductive strategies. It should therefore be considered as the key for a successful sustainability of fish diversity, and especially for typical periodic species that sustain most of commercial fisheries in the MPR.…”

Section: Discussionmentioning

confidence: 81%

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Interannual flow variability in a large subtropical–temperate floodplain: a challenge for fish reproduction

Abrial

Espínola

Rabuffetti

et al. 2019

Can. J. Fish. Aquat. Sci.

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Fluctuations of temperature and water levels are the two main drivers of aquatic life in river floodplain ecosystems. The large Middle Paraná River floodplain exhibits marked seasons and important interannual hydrological changes. Using a three-factor-based approach (fish reproductive traits, hydroclimatic conditions, and floodplain recruitment patterns), we analyzed how fish life history evolves within this fluctuating environment. We observed that hydroclimatic conditions can be considered through three main interannual variations that prompt the most abundant Paraná species to adopt four different main reproductive strategies: (i) typical periodic strategists are dependent on large spring–summer floods and juveniles strongly predominate in the floodplain when such a condition occurs, (ii) periodic–opportunistic strategists are associated with floods, regardless of their timing, (iii) periodic–equilibrium strategists take advantage of spring–summer floods whatever the intensity and duration, and (iv) equilibrium strategists have low flood dependence and higher stability in temporal fish recruitment. This work brings forth a first synthesis of fish life history in the Middle Paraná River and evidences how important both hydrological and temperature fluctuations are to interpret its complexity.

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Section: Discussionmentioning

confidence: 81%

“…Recent investigations have dealt with this hydrological variability and shown an important decline in fish abundance for main species when floods do not coincide with warm temperatures (Abrial et al 2014;Espínola et al 2016;Rabuffetti et al 2017).…”

Section: R a F T Introductionmentioning

confidence: 99%

Interannual flow variability in a large subtropical–temperate floodplain: a challenge for fish reproduction

Abrial

Espínola

Rabuffetti

et al. 2019

Can. J. Fish. Aquat. Sci.

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“…The largest gaps were concentrated in the 1950s and between the period 1997 and 2008. Details and descriptions of different datasets, the analyses carried out to select sites/ports and species in the same area, and the sampling method and effort applied per dataset were described in detail in the methodology reported by Rabuffetti et al (2016) and Rabuffetti (2018). The most frequent and abundant species common to the different datasets that appear along the analyzed period were selected (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…The bulk of freshwater fisheries in Argentina is concentrated in this reach (Espinach Ros et al, 2012; Fuentes & Quirós, 1988). When considering the reproduction and recruitment of fisheries in MPR, previous studies have shown that frequent spring–summer floods of greater than 6 m water height (measured at the gauging station at Santa Fe city), lasting more than 80 days and with extended rising waters slope are the optimum hydrologic conditions for sustaining the fisheries (Abrial et al, 2018; Rabuffetti, 2018; Rabuffetti et al, 2016).…”

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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“…Studies on the early dynamics of P. lineatus recruitment are scarce (Agostinho et al, 1993;Gomes & Agostinho, 1997), but a general assumption is that similar to marine fishes (Cushing, 1990;Hjort, 1914;Houde, 2008), survival during the downstream drift of early life stages and/or larvae and juveniles that colonised the floodplain lakes greatly determines the year-class strength of the species. A link between floods and river landings suggested an association between the recruitment of migratory fishes and water level (Quirós & Cuch, 1989;Rabuffetti et al, 2016). Other investigations conducted in the Upper River Paraná (Bailly, Agostinho & Suzuki, 2008;Gomes & Agostinho, 1997;Oliveira, Suzuki, Gomes & Agostinho, 2015;Suzuki et al, 2009) showed a relationship between high flood events and the recruitment of migratory species; however, on the basis of young fish surveys, the details of the initial dynamics of recruitment by monitoring earlier stages of fishes are less frequent (Barzotto, Sanches, Bialetzki, Orvati & Gomes, 2015;Zaniboni-Filho & Schulz, 2003).…”

Section: Introductionmentioning

confidence: 99%

Episodic recruitment of young Prochilodus lineatus (Valenciennes, 1836) (Characiformes: Prochilodontidae) during high discharge in a floodplain lake of the River Paraná, Argentina

Lozano¹,

Vegh

Gómez³

et al. 2019

Fisheries Management Eco

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Prochilodus lineatus (Val.) is one of the main target species of South American freshwater fisheries. The following null hypotheses regarding juvenile recruitment of P. lineatus were tested: (a) recruitment is not determined by variations in larval abundance and (b) recruitment is not determined by variations in discharge. For this purpose, variations in abundance of larvae in main channel drift and monthly captures of juveniles in a floodplain lake of the River Paraná were examined weekly between 2009 and 2016. Mean annual abundances of larval densities and CPUE of juveniles were correlated with a set of hydrometric variables. A positive correlation was found between the abundance of juveniles with high and persistent flood pulses. By contrast, larval abundance was not correlated with juvenile abundance. Pronounced contrast was found in the recruitment of P. lineatus between years of high and low discharge, which supports the hypothesis that floods are the main determining factor for recruitment of this species.

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Long-term Hydrologic Variability in a Large Subtropical Floodplain River: Effects on Commercial Fisheries

Cited by 16 publications

References 23 publications

Interannual flow variability in a large subtropical–temperate floodplain: a challenge for fish reproduction

Interannual flow variability in a large subtropical–temperate floodplain: a challenge for fish reproduction

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

Episodic recruitment of young Prochilodus lineatus (Valenciennes, 1836) (Characiformes: Prochilodontidae) during high discharge in a floodplain lake of the River Paraná, Argentina

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