Evaluation of PIT-tagging in an endangered Iberian cyprinid

Pires, Daniel; Ribeiro, Filipe; Magalhães, María Filomena

doi:10.1111/j.1439-0426.2010.01464.x

Cited by 3 publications

(7 citation statements)

References 17 publications

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“…Reasons for low recaptures are unknown, but they may result for instance from high mortality due to heavy predation by otters Lutra lutra (Magalhães et al ., ) or to a low proportion of fish marked due to high population densities. Also, it cannot be ruled out that low recaptures were at least partially associated with tag loss and increased mortality rates of tagged fish, although this was not found in laboratorial essays (see Pires et al ., ). Nevertheless, tag effects are unlikely to show major differences between movers and stayers; thus, we are confident that our estimates of mobility remain valid.…”

Section: Discussionmentioning

confidence: 99%

“…Chubs above 60 mm in fork length were marked with Passive Integrated Transponder (PIT) tags (Trovan ID-100A, 2.12 × 11.5 mm, RFID Systems LTD, Melton, United Kingdom). PIT tags were previously tested in the laboratory, and found to be retained and have little or no effects on survival, growth and swimming performance of chub (Pires et al, 2010b). Smaller chubs were not marked because sufficiently small PIT tags were unavailable and because handling small fish in the field could result in high mortality risk.…”

Section: Methodsmentioning

confidence: 99%

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Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

Pires

Beja

Magalhães

2014

River Research & Apps

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Movement may critically influence population persistence in the face of disturbance. However, data on individual movements into and out of refugia in response to disturbance remain limited, leading to an incomplete understanding of the ecological significance of mobility. Using individually marked chubs Squalius torgalensis in a seasonally drying Mediterranean stream, we quantified the rate, direction and magnitude of movements out of dry season pools, and of movements displayed across the stream over the period of hydrological connection. Recapture rate was lower in individuals marked in dry season pools (3.3%; n = 894) than in individuals marked during hydrological connection (13.0%; n = 522). Nearly half the recaptures (46.7%; n = 30) of chubs marked in dry season pools corresponded to movements that were generally longer than 100 m, overpassing the average distance among isolated pools. The frequency and distances travelled out of dry season pools were similar in upstream and downstream directions. Only 20.6% of recaptures of individuals marked during hydrological connection corresponded to movements, with more frequent and larger movements in the upstream direction. Body size was related to movement probability only for chubs marked during hydrological connection. Our results highlight considerable individual variability in movement and underscore the importance of understanding the consequences of this variation and how it may be maintained in fish populations facing increasing fragmentation and intermittency of riverscapes.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

Pires

Beja

Magalhães

2014

River Research & Apps

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“…We tagged nases with Visual Implant Elastomers (VIE, Northwest Marine Technology INC) and Passive Integrated Transponder tags (PIT, Trovan ID-100A, 2.12x11.5 mm), which are both considered suitable for small fishes (e.g. Pires et al 2010, Roberts & Angermeier 2007. VIE were subcutaneously inserted with a needle in the ventral part of and at the base of pectoral fin of fish.…”

Section: Methodsmentioning

confidence: 99%

First data on the movements of Iberochondrostoma almacai (Coelho, Mesquita, Collares-Pereira, 2005) out of dry-season pools in a Mediterranean stream

Pires¹,

Magalhães²

2013

An. Biol.

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Primeros datos de los movimientos de Iberochondrostoma almacai (Coelho, Mesquita & Collares-Pereira, 2005) desde de los refugios de estación seca, en un arroyo temporal mediterráneo La salida de los refugios durante la estación seca puede ser fundamental para la persistencia de los peces que habitan en arroyos temporales, aunque es un proceso poco conocido. En el presente trabajo, cuantificamos los movimientos desde refugios de Iberochondrostoma almacai en un arroyo mediterráneo mediante técnicas de marcaje-recaptura. Aunque algunos individuos permanecieron sedentarios, también se detectaron ejemplares con movimientos superiores a 200 m desde los refugios, tanto aguas arriba como aguas abajo y ocupando hábitats más o menos persistentes. Estos resultados sugieren que la especie tiende a redistribuirse tras la recuperacion de los caudales y a colonizar sitios anteriormente secos.

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“…For cyprinids, tag retention and the survival of tagged individuals has been evaluated previously for the genus Squalius (e.g. Bolland et al 2009b;Pires et al 2010). For example, Bolland et al (2009b) report the effects of PIT tags in terms of mortality and retention in large Squalius cephalus (L.).…”

Section: Introductionmentioning

confidence: 99%

“…For example, Bolland et al (2009b) report the effects of PIT tags in terms of mortality and retention in large Squalius cephalus (L.). In the study of Pires et al (2010) survival, tag retention and swimming performance are evaluated for an endangered Iberian cyprinid, Mira chub Squalius torgalensis (Coelho et al 1998). The objective of the present study was to extend the work on small cyprinids, focusing on both retention and survival, and growth, weight and condition of juvenile chub Squalius cephalus (L.) after implanting PIT tags.…”

Section: Introductionmentioning

confidence: 99%

Effect of implanting a passive integrated transponder tag in juvenile chub, Squalius cephalus (L.), on their condition, growth and survival

Horká

Horký

Slavík

2019

European Journal of Environmental Sciences

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The effect of implanting a Passive Integrated Transponder (PIT) tag on the survival, growth and condition of a small cyprinid, juvenile chub Squalius cephalus (L.) with a mean weight of 2.4 g was studied in the laboratory. During this experiment, which lasted for 31 days, 80 specimens were tagged. The changes in Fulton's condition factor (K), specific growth rate of mass (G M) and specific increase in length (L S) were evaluated. The results showed that implanting PIT tags did not affect the survival or growth of the fish; however, it had a negative effect on their condition. The initial size of the fish had a significant effect on the specific growth rate in terms of mass, but not in terms of length. Survival was 98.8% and tag retention 97.5%, when the tag made up 4.3% of the mass of the fish. These results demonstrate that PIT tagging is an appropriate method for chub heavier than 2 g. For this size category, we recommend that PIT tagging is suitable when the tag makes up 4.3% of the body mass of the individuals.

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Evaluation of PIT-tagging in an endangered Iberian cyprinid

Cited by 3 publications

References 17 publications

Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

Out of Pools: Movement Patterns of Mediterranean Stream Fish in Relation to Dry Season Refugia

First data on the movements of Iberochondrostoma almacai (Coelho, Mesquita, Collares-Pereira, 2005) out of dry-season pools in a Mediterranean stream

Effect of implanting a passive integrated transponder tag in juvenile chub, Squalius cephalus (L.), on their condition, growth and survival

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