Changes in abundance of hibernating bats in central Slovakia (1992–2009)

Uhrin, Marcel; Benda, Petr; Obuch, Ján; Urbán, Péter

doi:10.2478/s11756-010-0020-z

Cited by 35 publications

(24 citation statements)

References 13 publications

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“…The most numerous taxon hibernating there, M. mystacinus sensu lato, increased markedly. Similar trends in this group have been recorded in some regions of central Slovakia [22] and in some countries of Western Europe (for example, in the Netherlands [18,64] and central Belgium [17]). No such increase was noted in the United Kingdom [24, http://www.bats.org.uk/pages/ whiskered_brandts_bat_population_trends.html].…”

Section: Discussionsupporting

confidence: 80%

“…In the two largest Polish hibernacula for the species, the number of wintering individuals has decreased slightly since 1999 in the Nietoperek Bat Reserve [T. Kokurewicz, personal communication], and M. daubentonii showed only a slight upward trend in Szacownica Cave [23]. In many regions of Europe (e.g., central Slovakia, Bohemia) its numbers are stable, with locally moderate increases [21,22]. In the United Kingdom, no significant upward or downward trends have been recorded since 1997 [24, http://www.…”

Section: Discussionmentioning

confidence: 99%

“…The numbers of M. myotis in Poland have been stable in recent years (for example in the caves of the Kraków Upland [35] and Szachownica Cave [23]). In Slovakia, there have been moderate increases along with some local declines [22]. In the Czech Republic, steady growth in numbers has been noted since the early 1980s, where average numbers have almost doubled as compared to the 1970s [21].…”

Section: Discussionmentioning

confidence: 99%

“…However, a number of factors made it difficult to carry out the monitoring program within the time frames normally adopted in this type of study (the last decade of January or the first decade of February) [22]: changing weather, difficulties reaching the cave entrances (sometimes made impossible by thick snow cover burying the entrances), and the risk of avalanches. Also hampering the work was that additionally some of the caves are very large and technically difficult to monitor, requiring up to 48 hours of work.…”

Section: Winter Monitoringmentioning

confidence: 99%

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The bat fauna hibernating in the caves of the Polish Tatra Mountains, and its long-term changes

Piksa

Nowak²

2013

Open Life Sciences

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Winter Monitoringmentioning

confidence: 99%

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The bat fauna hibernating in the caves of the Polish Tatra Mountains, and its long-term changes

Piksa

Nowak²

2013

Open Life Sciences

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“…20-30 m from the cave entrance only; no salamanders were recorded in deeper parts of the cave. This is an observation made during annual winter monitoring of bats conducted in almost the entire cave (Uhrin et al, 2010).…”

Section: Methodsmentioning

confidence: 82%

Subterranean systems provide a suitable overwintering habitat for Salamandra salamandra

Balogová¹,

Jelić²,

Kyselová³

et al. 2017

IJS

Self Cite

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Abstract:The fire salamander (Salamandra salamandra) has been repeatedly noted to occur in natural and artificial subterranean systems. Despite the obvious connection of this species with underground shelters, their level of dependence and importance to the species is still not fully understood. In this study, we carried out long-term monitoring based on the capture-markrecapture method in two wintering populations aggregated in extensive underground habitats. Using the POPAN model we found the population size in a natural shelter to be more than twice that of an artificial underground shelter. Survival and recapture probabilities calculated using the Cormack-Jolly-Seber model were very constant over time, with higher survival values in males than in females and juveniles, though in terms of recapture probability, the opposite situation was recorded. In addition, survival probability obtained from Cormack-Jolly-Seber model was higher than survival from POPAN model. The observed bigger population size and the lower recapture rate in the natural cave was probably a reflection of habitat complexity. Our study showed that regular visits are needed to detect the true significance of underground shelters for fire salamanders. The presence of larvae was recorded in both wintering sites, especially in bodies of water near the entrance. On the basis of previous and our observations we incline to the view, that karst areas can induce not only laying in underground shelters but also group wintering in this species. Our study highlights the strong connection of the life cycle of fire salamanders with underground shelters and their essential importance for the persistence of some populations during unfavourable conditions and breeding activity. In addition, the study introduces the POPAN and Cormac-Jolly-Seber models for estimating of population size, survival and recapture probability in wintering populations of the species, which could provide important information for species conservation.fire salamander, underground shelter, capture-mark-recapture method, population size, survival probability, recapture probability

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An adaptation of dual‐frame sampling for estimating bat population trends in multi‐hibernacula systems

Weller,

Smith,

Thomas

et al. 2024

J Wildl Manag

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Reliable estimates of population trends are important for prioritizing and implementing wildlife management actions. Abundance estimates are the most informative metric of population status but are difficult and costly to achieve for rare or elusive species. For bat species that are highly mobile and nocturnal, abundance estimates are usually only possible at their roosts. Although they are relatively easy to census in individual roosts, it is often unclear whether observed trends are representative of broader populations trends. Dual‐frame sampling is useful for monitoring wildlife populations that exhibit site fidelity and are highly visible but where the proportion of the population in known sites is unknown. We adapted a dual‐frame sampling approach to estimate abundance of Townsend's big‐eared bats (Corynorhinus townsendii) hibernating in a system of >800 caves at Lava Beds National Monument (LBNM) in northern California, USA, in 2013–2022. Beginning with a list of opportunistically discovered hibernacula, we expanded inference to the entire system by randomly selecting sites and stratifying survey effort according to number of bats observed during previous counts. Following 4 years of surveys, we began substituting survey‐informed estimates for some site types to improve efficiency of the monitoring effort. We estimated that a mean of 2,216 ± 112 (SE) bats hibernated at the study site annually and observed fluctuations of up to 22% around the mean population estimate and as much as 21% from the previous year. Despite annual fluctuations, we did not detect a trend in the number of hibernating bats at LBNM over the study period, underlining the challenges of detecting population trends in long‐lived species not exposed to pronounced stressors. Because our analytical approach generates reliable estimates of trend while accommodating annual variability in survey effort among years, it should be attractive to wildlife managers faced with shifting priorities and resources.

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Changes in abundance of hibernating bats in central Slovakia (1992–2009)

Cited by 35 publications

References 13 publications

The bat fauna hibernating in the caves of the Polish Tatra Mountains, and its long-term changes

The bat fauna hibernating in the caves of the Polish Tatra Mountains, and its long-term changes

Subterranean systems provide a suitable overwintering habitat for Salamandra salamandra

An adaptation of dual‐frame sampling for estimating bat population trends in multi‐hibernacula systems

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