Use of visible implant elastomer and its effect on the survival of an endangered minute salamander

Oropeza-Sánchez, Marco Tulio; Sandoval-Comte, Adriana; García-Bañuelos, Paulina; Hernández-López, Patricia; Pineda, Eduardo

doi:10.32800/abc.2020.43.0187

Cited by 4 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assessments of the welfare impacts involved in the process of marking amphibians do not always discriminate between handling and marking (but see Oropeza Sánchez et al 2020 ). This overlooks the directionality of the welfare assessment process, embedded in Soulsbury et al’s ( 2020 ) decision tree for marking wildlife.…”

Section: Discussionmentioning

confidence: 99%

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: An experimental approach

Daversa,

Baxter,

Rosa

et al. 2024

Anim. welf.

View full text Add to dashboard Cite

Major advancements in ecology and biodiversity conservation have been made thanks to methods for marking and individually tracking animals. Marking animals is both widely used and controversial due to the potential consequences for animal welfare, which are often incompletely evaluated prior to implementation. Two outstanding knowledge gaps concerning the welfare consequences of individual marking are their short-term behavioural impacts and the relative impacts from marking versus the handling of animals while carrying out procedures. We addressed these knowledge gaps through an experimental study of alpine newts (Ichthyosaura alpestris) in which we varied handling and marking procedures. Examining individual responses to handling, toe clipping and visible implant elastomer (VIE) injection over 21 days showed that handling and marking elicited increased newt activity and hesitancy to feed compared to animals that did not get handled or marked. These effects were apparent even when animals were handled only (not marked), and marking did not further increase the magnitude of responses. Increases in newt activity and feeding hesitancy were transient; they were not observed in the weeks following handling and marking. While previous studies emphasise the welfare impacts of marking procedures themselves, these findings highlight that handling alone can elicit behavioural changes with possible costs to welfare. Yet, the transient nature of behavioural responses suggests that immediate costs of handling may be subsequently compensated for in the short term.

show abstract

Section: Discussionmentioning

confidence: 99%

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: An experimental approach

Daversa,

Baxter,

Rosa

et al. 2024

Anim. welf.

View full text Add to dashboard Cite

show abstract

“…Assessments of the welfare impacts involved in the process of marking amphibians do not always discriminate between handling and marking (but see Oropeza-Sánchez et al 2020). This overlooks the directionality of the welfare assessment process, embedded in Soulsbury et al’s (2020) decision tree for marking wildlife.…”

Section: Discussionmentioning

confidence: 99%

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: an experimental approach

Daversa,

Baxter,

Rosa

et al. 2023

Preprint

View full text Add to dashboard Cite

Major advancements in ecology and biodiversity conservation have been made thanks to methods for marking and individually tracking animals. Marking animals is both widely used and controversial due to the potential consequences to animal welfare, which are often incompletely evaluated before implementation. Two outstanding knowledge gaps concerning the welfare consequences of individual marking concerns their short-term behavioural impacts and the relative impacts from marking versus the handling of animals while carrying out procedures. We addressed these knowledge gaps through an experimental study of alpine newts (Ichthyosaura alpestris) in which we varied handling and marking procedures. Examining individual responses to handling, toe-clipping and visible implant elastomer (VIE) injection over 21 days showed that handling and marking elicited increased newt activity and hesitancy to feed compared to animals that did not get handled or marked. These effects were apparent even when animals were handled only (not marked), and marking did not further increase the magnitude of responses. Increases in newt activity and feeding hesitancy were transient; they were not observed in the weeks following handling and marking. Whereas previous studies emphasize the welfare impacts of marking procedures themselves, these findings highlight that handling alone can elicit behavioural changes with possible costs to welfare. Yet, the transient nature of behavioural responses observed here suggests that immediate costs of handling may be subsequently compensated for.

show abstract

“…Visual implant elastomer are commonly used to tag amphibians and have minimal effects on survival and are more permananet than other marking techniques (e.g. toe clipping; Bailey 2004, Oropeza-Sánchez et al 2020. We also recorded morphometric data including snout-vent-length (SVL), sex, and a photograph of the dorsum of each individual using an iPhone 6S+.…”

Section: Capture-mark-recapture Surveysmentioning

confidence: 99%

Spatial Variation in Demographic Processes and the Potential Role of Hybridization to Future Persistence

Gade¹,

Zhao²,

Peterman³

2021

Preprint

View full text Add to dashboard Cite

CONTEXTSpatial variation in life history traits plays a crucial role in the structure and dynamics of populations. The demographic responses of local populations to fine-scale habitat heterogeneity have consequences for species at a broader scale and responses vary across spatial scales. Yet, the specific nature of such relationships is unclear across taxa.OBJECTIVESWe evaluated the spatial variation in demographic traits of cryptic terrestrial salamanders across the broad scale environmental gradient of elevation (i.e. temperature) and the fine-scale gradient of stream distance (i.e. moisture).METHODSUsing a 4-years of spatial mark-recapture and count data, we implemented a spatially explicit Integrated Population Model to understand demographic rates across scales. We also investigated how hybridization, which occurs in between lungless salamanders at mid-elevations, may influence demographic rates.RESULTSWe found that high elevation animals grow faster and move more, especially far from streams likely as a result of increased temperatures. Survival was highest but recruitment rates were lowest at low elevations and significantly declined with distance to stream. We also found that hybrid animals at low elevations had higher survival probabilities.CONCLUSIONSOur study reveals nuanced spatial variation in demographic rates that differ in magnitude depending on the scale at which they are assessed. Our results also show animals exhibit demographic compensation across abiotic gradients, underscoring the need for further conservation and management efforts to implement spatially explicit and dynamic strategies to match the demographic variation of species and populations of species separated across space.

show abstract

Use of visible implant elastomer and its effect on the survival of an endangered minute salamander

Cited by 4 publications

References 9 publications

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: An experimental approach

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: An experimental approach

Standard methods for marking caudate amphibians do not impair animal welfare over the short term: an experimental approach

Spatial Variation in Demographic Processes and the Potential Role of Hybridization to Future Persistence

Contact Info

Product

Resources

About