Feeding habits of Pterodoras granulosus (Valenciennes) (Pisces, Doradidae) in the lower Plata Basin

Ferriz, Ricardo A.; Villar, Carlos; Colautti, Darío César; Bonetto, Carlos Alberto

doi:10.22179/revmacn.2.151

Cited by 20 publications

(27 citation statements)

References 1 publication

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“…Fish have been reported to consume these mollusks, particularly the Doradidae Pterodoras granulosus, whose diet contains large amounts of C. fluminae and L. fortunei (Ferriz et al 2000;Gaspar da Luz et al 2002;Cantanhêde et al 2008). Although the eradication of aquatic invasive species is a difficult task (Vitule et al 2009), it is expected that intensive consumption can have an important role in their control.…”

Section: Diet Compositionmentioning

confidence: 99%

“…Its consumption of L. fortunei and C. fluminae has been documented for the Paraná River basin (Ferriz et al 2000;Gaspar da Luz et al 2002;Cantanhêde et al 2008). The pharyngeal teeth, arranged in plates, are small, and the species' diet has been described as omnivorous, opportunistically taking the most available food (Gaspar da Luz et al 2002).…”

Section: Degree Of Digestion Of the Bivalvesmentioning

confidence: 99%

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Fish as Potential Controllers of Invasive Mollusks in a Neotropical Reservoir

Oliveira¹,

Fugi²,

Brancalhão³

et al. 2010

Nat. Conserv.

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We evaluated the importance of the invasive mollusks (Corbicula fluminea and Limnoperna fortunei) in the diets of the fish species through analysis of stomach contents of fish caught in the commercial fishery in the years 2005 and 2006 in the Itaipu Reservoir (Upper Paraná River). The degree that these bivalves are processed in the digestive tract was used to identify potential controllers.Food items were evaluated by using the methods of occurrence, volume, and Feeding Index (IAi). Out of the 36 fish species present in the fishery landings, 24 consumed L. fortunei and 12 consumed C. fluminea. In order to evaluate the possibility that the bivalves pass through the digestive tract of the predator without any damage, their degree of digestion was evaluated. Only species with morphological pre-adaptations for a malacophagous diet, or that managed to crush the shells of these bivalves were very successful with this kind of food. In particular, Megalancistrus parananus, Leporinus obtusidens, and Leporinus macrocephalus may be regarded as potential biological control agents for these invasive populations.

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Section: Diet Compositionmentioning

confidence: 99%

Section: Degree Of Digestion Of the Bivalvesmentioning

confidence: 99%

Fish as Potential Controllers of Invasive Mollusks in a Neotropical Reservoir

Oliveira¹,

Fugi²,

Brancalhão³

et al. 2010

Nat. Conserv.

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“…Pterodoras granulosus feed on fruit, seed, vegetables, crustaceans and fish (Panattieri & Del Barco, 1982;Darrigran & Colautti, 1994;Ferriz et al, 2000). Leporinus obtusidens has a similar diet, but includes small fish and mollusk (Mastrarrigo, 1950;Ringuelet et al, 1967).…”

Section: Discussionmentioning

confidence: 99%

“…Leporinus obtusidens has a similar diet, but includes small fish and mollusk (Mastrarrigo, 1950;Ringuelet et al, 1967). Due to their euriphagy, all these species have changed their diet because of the invasion by Corbicula fluminea and Limnoperna fortunei, mollusk from southeast Asian, in the Río de la Plata basin (Ferriz et al, 2000;García & Protogino, 2005). Netuma barba is a benthophagous species.…”

Section: Discussionmentioning

confidence: 99%

From fresh water to the slope: fish community ecology in the Rio de la Plata and the sea beyond

García

Jaureguízar

Protogino

2010

lajar

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ABSTRACT. The spatial pattern of fish assemblages and its relationship with factors along an environment gradient, from fresh to marine water environment along the Río de la Plata estuary (36ºS, 56ºW) the shelf and part of the slope, was examined using data from 22 sampling stations. Fish were sampled from all station with an Engel type trawl (200 mm stretched mesh in the wings, 120 mm stretched mesh in the cod ends, 4 m vertical opening and 15 m horizontal aperture) towed at 4 knots for 20 to 30 min per set. Cluster analysis and ordination analysis MDS were used to define spatial distribution of fish assemblages based on fish composition (abundance and biomass). BIO-ENV process was used to estimate assemblage association with depth, temperature and salinity of surface and bottom waters. The results of these analyses showed that the fish community along the riverine-marine gradient was structured in four assemblages: riverine, estuarine, shelf and slope. These assemblages were found to differ significantly in their species composition. Each assemblage was characterized by several common and discriminator species and characterized by differing environmental conditions. Bottom salinity and bottom temperature were the environmental variables most strongly associated with differences in assemblage structure across the various areas. The changes in assemblage structure between areas were gradual, with no sharp boundaries. Keywords: fish assemblages, riverine-marine gradient, environmental variables, estuary, Río de la Plata, Argentine.Desde el agua dulce hasta el talud: ecología de comunidades de peces en el Río de la Plata y el mar adyacente RESUMEN. Se analizó el patrón espacial de las asociaciones de peces y su relación con los factores ambientales a lo largo del gradiente desde el agua dulce en el Río de la Plata hasta la parte superior del talud. Los peces fueron muestreados en 22 estaciones con una red de arrastre de fondo tipo Engel (200 mm de abertura de malla en las alas, 120 en el copo, 4 m de abertura vertical y 15 m de abertura horizontal) con una velocidad de arrastre de 4 nudos durante 20 a 30 min. Para definir la distribución espacial de las asociaciones de peces basadas en la composición de la ictiofauna (abundancia y biomasa) se aplicó el análisis de agrupamiento jerárquico y el análisis de ordenación MDS y para estimar la relación entre estas asociaciones con la profundidad, la temperatura y la salinidad del agua en la superficie y el fondo, se utilizó el proceso BIO-ENV. Los resultados obtenidos demuestran que en la comunidad de peces a lo largo de este gradiente riverinomarino se pueden establecer cuatro asociaciones: riverina, estuarial, plataforma y talud. Estas asociaciones fueron significativamente diferentes en la composición de especies, cada una de ellas fue caracterizada por varias especies comunes y discriminantes y presentó diferentes condiciones ambientales. Concluimos que la salinidad y temperatura de fondo fueron las variables ambientales determinantes de la estructura de las asociaci...

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“…With the invasion of L. fortunei in the Neotropical region, dietary changes have been noted in omnivorous fishes, which have switched from a low quality, predominantly plantbased diet, to an energetically rich diet dominated by invasive mollusks (MONTALTO et al 1999, FERRIZ et al 2000, BOLTOVSKOY et al 2006, LOPES & VIEIRA 2012. With the invasion of L. fortunei, part of the organic matter in the turbid São Gonçalo Channel will be filtered and modified into a form available to organisms that cannot feed on small particles, like fishes.…”

mentioning

confidence: 99%

Size-selective predation of the catfish Pimelodus pintado (Siluriformes: Pimelodidae) on the golden mussel Limnoperna fortunei (Bivalvia: Mytilidae)

Vieira¹,

Lopes²

2013

Zoologia (Curitiba)

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ABSTRACT. This paper describes the size-selective predation on Limnoperna fortunei (Dunker, 1857) by Pimelodus pintado (Azpelicueta, Lundberg & Loureiro, 2008) fortunei was found to be the most important food item of P. pintado. The variation in length of the mussels (0.7-3.2 cm, with a mode of 1.3 cm) indicates that the species is now fully established in the system. Our data indicates that large individuals of P. pintado incorporate more mussels in their diets than small individuals. However, regardless of their size, P. pintado individuals predate only on small (<1.4 cm) representatives of L. fortunei. This prey size corresponds to a phase when the mussel is more mobile and readily available for fish. Larger, more aggregated prey groups that are attached to hard substrates are avoided by fish predators.

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Feeding habits of Pterodoras granulosus (Valenciennes) (Pisces, Doradidae) in the lower Plata Basin

Cited by 20 publications

References 1 publication

Fish as Potential Controllers of Invasive Mollusks in a Neotropical Reservoir

Fish as Potential Controllers of Invasive Mollusks in a Neotropical Reservoir

From fresh water to the slope: fish community ecology in the Rio de la Plata and the sea beyond

Size-selective predation of the catfish Pimelodus pintado (Siluriformes: Pimelodidae) on the golden mussel Limnoperna fortunei (Bivalvia: Mytilidae)

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