Reporting on the recapture of electronic tagged fish by fishers in the Xingu River, Brazilian Amazon

Hahn, Lisiane; Nunes, Leonardo D.; Câmara, Luís Fernando da; Machado, Sandro Lemos; Abolis, D; Fries, L C C; Martins, Eduardo G.; Garrone‐Neto, Domingos

doi:10.1590/1519-6984.02214bm

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…hemioliopterus = 5, P . punctifer = 2) were recaptured and reported by fishers in the Xingu River within 90 days from being released 30 . In the São Francisco River, up to 62.5% of radio-tagged Pseudoplatystoma corruscans were potentially harvested by fishers 31 .…”

Section: Discussionmentioning

confidence: 99%

“…We fitted each individual with a combined acoustic and radio transmitter (Lotek Wireless CART Series®, models MM-MC-16-50 [16 × 86 mm, 37 g in the air, life of 531 days at a 5 sec burst rate for radio and 10 sec for acoustics] and MM-MC-16-33 [16 × 73 mm, 31 g in the air, life of 332 days at a 5 sec burst rate for radio and 10 sec for acoustics], which was surgically implanted into the abdominal cavity 52 . In addition to the transmitters, we marked fish with external hydrostatic anchor tags (Hallprint©, model standard TBA) to facilitate identification and return of transmitters and/or tagged fish recaptured by fishers 30 . The duration of surgery was 2–15 min (median 6 min).…”

Section: Methodsmentioning

confidence: 99%

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Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon

Hahn¹,

Martins

Nunes³

et al. 2019

Sci Rep

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We used a combination of radio and acoustic telemetry to assess the movements of large catfish (Pimelodidae) in the Xingu River, a clearwater tributary of the Amazon River in Brazil. A total of 121 Phractocephalus hemioliopterus and 61 Pseudoplatystoma punctifer were tagged for monitoring within a 685 km segment, including the Belo Monte Hydroelectric Complex (BMHC), between February 2013 and July 2015. Long distance upstream movements were detected for P . hemioliopterus (up to 347 km) and for P . punctifer (up to 164 km) mainly during the transition between dry season and the rising water period. Both species moved through a long segment of rapids previously thought to function as barriers to migration. Several individuals exhibited long-distance bidirectional movements. Some tagged fish never left the release zone, indicating mortality, tag loss or resident individuals, which would characterize partial migration. The findings show evidence of migratory behaviour for large catfish within the Xingu River, emphasizing the influence of the hydrologic cycle on their movements. As part of the study area has become partially dewatered due to the BMHC, findings support the need of adequate management strategies to allow the movements of large catfish between spawning and feeding sites in the Xingu River.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon

Hahn¹,

Martins

Nunes³

et al. 2019

Sci Rep

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“…their spatial and temporal scales are very limited. The reasons for the lack of predam studies include the limited time between licensing and dam construction and operation, the technical complexity of studies, and difficulties experienced in regions with poor infrastructure such as the Amazon basin (Hahn, 2012;Hahn et al, 2015). At best, studies assessing the migration patterns of fish affected by hydropower projects are initiated during dam construction (Hahn et al, 2019a;Hahn et al, 2019b), at a stage when the hydrological dynamics have already been significantly altered, affecting the migratory behaviour of the species.…”

Section: Introductionmentioning

confidence: 99%

Dazed and confused: Behavioural constraints impose major challenges to fish passage in the neotropics

Lopes

Alves²,

Peressin

2021

Aquatic Conservation

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1. The role of fish translocation upstream of dams, for the conservation of migratory species, is controversial. An important but still unaddressed question is whether migratory patterns are affected, after the translocation events, by a hydropower dam. In existing dams, a useful means to test this might be to compare the behaviour of translocated fish with those in undammed river segments in the same region.2. The objective of this study was to evaluate the effectiveness of fish translocation in promoting access to spawning areas through a behavioural approach using Prochilodus costatus as a study model in the São Francisco River, south-east Brazil.3. The reservoir acted as a barrier to the dispersal of translocated individuals with only a small fraction of the population able to locate lotic stretches in the tributaries. Individuals translocated to undammed stretches of river upstream of the reservoir exhibited movement behaviour that was markedly different from that of individuals native to this region. Translocated individuals mainly displayed an erratic pattern of movement between upstream and downstream stretches of river with no specific route. In contrast, local individuals made long-distance upstream spawning migrations and downstream return migrations to feeding sites during specific periods of the year. The results indicate that translocating individuals upstream of Três Marias damtends to be ineffective for the conservation of P. costatus in the region. The study showed that the behaviour of translocated individuals, a largely neglected factor for the tropical region, may be an additional barrier to the success of conservation programmes based on fish passage systems. For the population studied, the maintenance of a free-flowing stretch where fish are able to complete their life cycle is a more viable and effective alternative for conservation.

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“…Large‐scale fish telemetry ( i.e ., radio and acoustic) studies are used worldwide to detect individual movements, but since 2011 have they been applied in the Amazon Basin, mostly focused on the evaluation of the effect of dams on catfish migration, such as in Xingu (Hahn et al, ) and Madeira rivers. In the Madeira River, B. rousseauxii , B. vaillantii , B. platynemum and B. filamentosum have been tagged with radio or combined acoustic and radio transmitters (CART) and marked with hydrostatic anchor tags (Hallprint, model standard TBA; http://www.halprint.com) following the procedures described by Hahn et al ().…”

Section: List Of Specimens Studied With Catalog Numbers Haplotypes Amentioning

confidence: 98%

Genetics and telemetry indicate unexpected movements among structured populations for Brachyplatystoma platynemum in the Amazon

Hahn¹,

Silva

Malabarba

et al. 2019

Journal of Fish Biology

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The genetic analysis of Brachyplatystoma platynemum individuals sampled from the lower Madeira River reinforces the existence of two structured populations in the Amazon Basin (Madeira and Amazon populations). However, the recapture of an individual from the Amazon population in the Solimões River, which was telemetry‐tagged in the Madeira River after the damming, indicates that fish from the Amazon population move between the two river systems. This has not yet been observed, however, in the Madeira River population, which is currently divided and isolated in the lower and upper Madeira River by the construction of two dams.

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Reporting on the recapture of electronic tagged fish by fishers in the Xingu River, Brazilian Amazon

Cited by 5 publications

References 6 publications

Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon

Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon

Dazed and confused: Behavioural constraints impose major challenges to fish passage in the neotropics

Genetics and telemetry indicate unexpected movements among structured populations for Brachyplatystoma platynemum in the Amazon

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