Age and growth of Prochilodus lineatus in a spatially structured population: is there concordance between otoliths and scales?

Santana, Herick Soares de; Minte-Vera, Carolina V.

doi:10.1007/s10641-017-0574-5

Cited by 9 publications

(7 citation statements)

References 36 publications

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“…The ladder at the Porto Primavera Dam allowed bidirectional migrations of adult fish, and sometimes multiple passes for the same individuals. Juveniles develop in marginal lakes, and return to rivers once they reach 10–25 cm standard length at ages 1–2 (Santana & Minte‐Vera, ). Although we did not track the movements of juveniles, we have observed them annually moving through the ladder with adults, and occasionally numbering in the thousands (S. Makrakis, Makrakis, & Wagner, ).…”

Section: Discussionmentioning

confidence: 99%

Bidirectional connectivity via fish ladders in a large Neotropical river

Celestino

Sanz‐Ronda

Miranda

et al. 2019

River Research & Apps

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The conservation of migratory fish species worldwide has been threatened by the loss of longitudinal connectivity caused by dams intercepting large rivers. One environmental management strategy for reestablishing connectivity is providing passage through fish ladders. However, ladders in Neotropical rivers have been described as ascending one‐way routes. We analysed the movements of Prochilodus lineatus through a fish ladder at a large dam—Porto Primavera—in the heavily impounded Upper Paraná River, Brazil, to determine whether the ladder connected habitats downstream and upstream of the dam, in both directions. A total of 1,419 specimens of P. lineatus were PIT‐tagged above and below the dam, and continuously monitored for 4 years. We documented bidirectional movements of P. lineatus through the fish ladder. Many individuals repeated these movements annually; one individual as many as six times. It was estimated that the cumulative probability that P. lineatus would return from downstream after descending through the ladder was 0.38, 0.50, and 0.56 in 1, 2, and 3 years, respectively. Correspondingly, return probabilities from upstream were 0.15, 0.22, and 0.26 in 1–3 years, respectively. Although return probabilities from upstream were roughly half, our results suggest the Porto Primavera fish ladder contributes to habitat connectivity, bidirectional passage, and preservation of P. lineatus. These results deviate from the perception that fishways are ineffective in Neotropical rivers. We suggest that fishways can restore the bidirectional connectivity denied to some Neotropical species, and until the services of dams are no longer needed, environmental management through fish ladders could continue to be considered as an integral part of broader conservation strategy designed to preserve native fauna.

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Section: Discussionmentioning

confidence: 99%

Bidirectional connectivity via fish ladders in a large Neotropical river

Celestino

Sanz‐Ronda

Miranda

et al. 2019

River Research & Apps

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“…The marginal increment considers the distances of the last and next to last ring to the edge of the otolith. This metric demonstrated that only one ring is formed annually during the winter, more details about age, growth and validation patterns can be seen in Santana, Minte-Vera (2017). The left otoliths were deposited in the collection of the Growth and Reproduction Laboratory of the Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia) in the Universidade Estadual de Maringá (UEM), Paraná, Brazil.…”

Section: Methodsmentioning

confidence: 95%

“…1): three rivers (Paraná, Baía and Ivinhema), four open lakes (lagoa do Guaraná, lagoa dos Patos, lagoa das Garças e ressaco do Pau Véio) and three closed lakes (lagoa Ventura, lagoa do Osmar e lagoa Fechada). This set of sites comprises the main growth and breeding sites of P. lineatus, since the population of this species has a marked spatial structure (Santana, Minte-Vera, 2017).…”

Section: Methodsmentioning

confidence: 99%

Otolith morphometry provides length and weight predictions and insights about capture sites of Prochilodus lineatus (Characiformes: Prochilodontidae)

2018

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Here we choose the sábalo Prochilodus lineatus, to answer the following questions: How the otolith length and weight are correlated to fish measurements (length and weight)? How reliable are the otoliths measurements to predict the length and age of P. lineatus? Finally, we propose predictive equations of the length and weight of the fish using length and weight of the otolith. The otoliths were sampled from individuals collected in the Upper Paraná River floodplain during 2012 and 2013 years. The relationships among the otolith measurements and both length and weight of the fish were performed using linear regressions. To test whether the length and weight of the otolith differ between the sampled sites, Variance Analysis was performed. Finally, we made analysis of Kruskal-Wallis to verify if the measurements obtained through the otoliths could be used to distinguish the age of the fish. We demonstrate that the length and weight of the otolith are good proxies to predict the length and weight of the fish. Although some ages were statistically different, this result does not support the idea that the age of the fish can be accurately inferred only using otolith measures.

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“…Compared to São Paulo and Paraná State, this section of the Upper Paraná River in Mato Grosso do Sul State is characterized by lower human density, although the region is impacted by agriculture and livestock. Still, the absence of larger dams and a larger floodplain portion in the lower portion allow for the maintenance of diversified ichthyofauna (Thomaz et al, 2007;Petsch et al, 2013), while also acting as an important environment for larger species to complete their life cycles (Santana and Minte-Vera, 2017).…”

Section: Study Areamentioning

confidence: 99%

Life-history traits of Farlowella hahni (Siluriformes, Loricariidae) in streams of the Ivinhema River Basin, Upper Paraná Basin

et al. 2019

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Brazilian laws allow the catch of some species as ornamental fish; however, in the absence of biological information, such catch can threaten species conservation. Therefore, this study aimed to offer population and reproductive information about Farlowella hahni in streams of the Ivinhema River Basin, Upper Paraná Basin. To accomplish this, a total of 165 F. hahni individuals were analyzed, including 109 females and 48 males, resulting in an important sex ratio difference from 1:1 (χ 2=19.97; p<0.001), indicating a predominance of females throughout the year. Females reach higher standard length than males. Males presented isometric Length-Weight Relationships, while females have positive allometric growth. Gonadosomatic index presented higher values from October through December. The mean fecundity was 100.3±36.4 of vitellogenic oocytes and was positively correlated with standard length (r=0.51; p=0.01). The data presented herein are the first for this species and suggest a need to carefully manage the F. hahni population, considering its low abundance and fecundity.

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Age and growth of Prochilodus lineatus in a spatially structured population: is there concordance between otoliths and scales?

Cited by 9 publications

References 36 publications

Bidirectional connectivity via fish ladders in a large Neotropical river

Bidirectional connectivity via fish ladders in a large Neotropical river

Otolith morphometry provides length and weight predictions and insights about capture sites of Prochilodus lineatus (Characiformes: Prochilodontidae)

Life-history traits of Farlowella hahni (Siluriformes, Loricariidae) in streams of the Ivinhema River Basin, Upper Paraná Basin

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