Use of Underground Hibernacula by the Barbastelle (<i>Barbastella barbastellus</i>) Outside the Hibernation Season

Gottfried, Iwona

doi:10.3161/150811009x485594

Cited by 17 publications

(27 citation statements)

References 27 publications

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“…Adult individuals prevailed over young bats as in other studies (Furmankiewicz and Górniak 2002;Glover and Altringham 2008;Piksa 2008;Gottfried 2009). The high male ratio: 81.5 % (subadults included) and their reproductive status (88.6 % sexually active) is also comparable with other swarming sites of the Natterer's bat in Poland and UK (Furmankiewicz and Górniak 2002;Rivers et al 2006;Glover and Altringham 2008).…”

Section: Discussionmentioning

confidence: 75%

“…The adult males' seasonal and nightly BCI changes indicated that their fat accumulation for winter starts in October, after the species' peak of activity, and lasts nearly just before hibernation period. It was mentioned before that the peak of activity of the Natterer's bat occurs later in comparison to other swarming species such as: M. brandtii, M. mystacinus, M. daubentonii, Myotis dasycneme, and B. barbastellus (Furmankiewicz and Górniak 2002;Parsons et al 2003;Piksa 2008;Šuba et al 2008;Gottfried 2009). This late swarming activity was suggested to be coupled with the Natterer's bat's greatest gleaning ability (Parsons et al 2003).…”

Section: Condition Of Adult Males Of the Natterer's Bat In Relation Tmentioning

confidence: 99%

“…In Barbastella barbastellus during the period of the most intensive swarming activity, both adult females and adult males have the lowest BCI in season (Gottfried 2009). In M. daubentonii, the lowest body mass of adult males in swarming season overlaps with the swarming activity peak of adult females as well (Encarnação et al 2004;Šuba et al 2008;Rughetti and Toffoli 2014).…”

Section: Condition Of Adult Males Of the Natterer's Bat In Relation Tmentioning

confidence: 99%

“…It means that a bat has to compromise between spending time and energy on both activities, because an individual success (survival and reproduction) depends on the effect of proper investment. Males usually outnumber females during the entire swarming season (Rivers et al 2006;Gottfried 2009;Piksa et al 2011). This is interpreted as males spend more time at swarming sites than females to increase the number of copulations, which enhances their reproductive success (Rivers et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Activity pattern and fat accumulation strategy of the Natterer’s bat (Vespertilionidae, Chiroptera) swarming population indicate the exact time of male mating effort

et al. 2016

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Studies concerning bat autumn swarming behavior suggest that the main purpose of this phenomenon is mating. However, the process of fat accumulation is crucial for surviving winter, and it seems to be in clear conflict with a need to strive for the opportunity to mate prior to hibernation. Investment in one activity limits the other one creating a trade-off between them. The aim of our study was to describe the activity pattern of each sex-age group (adult males, adult females, subadults) of the Natterer's bat during swarming period and to investigate the fat accumulation process of adult males in the context of their reproductive strategy. Bats were captured by mist nets at the swarming site fortnightly from the early August until the late November. The age, sex, reproductive status, and body condition index (mass to forearm ratio, BCI) were recorded. The activity peak of both sexes, adults, and subadults was observed in the late September. That time in season, BCI of adult males was the lowest, and there was no correlation between the hour of an adult male capture and its BCI value within one night (r s = 0.23; p = 0.157). Such correlation was observed later in the season (early October: r s = 0.44; p = 0.020; late October: r s = 0.48; p = 0.002). A negative correlation between adult males' BCI and proportion of adult females was found (r = 0.44; p = 0.000). We conclude that the activity peak of females is likely to be responsible for the effort of the mating behavior of the males, which is reflected by their low condition index. We suggest that the gleaning foraging strategy of Natterer's bat allows the males to postpone their fat accumulation until just before hibernation.

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Section: Discussionmentioning

confidence: 75%

Section: Condition Of Adult Males Of the Natterer's Bat In Relation Tmentioning

confidence: 99%

Section: Condition Of Adult Males Of the Natterer's Bat In Relation Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Activity pattern and fat accumulation strategy of the Natterer’s bat (Vespertilionidae, Chiroptera) swarming population indicate the exact time of male mating effort

et al. 2016

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“…Algunos estudios fueron realizados partiendo de diferentes aspectos del "swarming", como la riqueza de especies y abundancia, actividad (Kiefer et al, 1994;Parsons et al, 2003a;Schunger et al, 2004;Rivers et al, 2006;Piksa, 2008), sex-ratio (Kerth et al, 2003;Parsons et al, 2003b;Rivers et al, 2006;Piksa et al, 2011) y condición física de los machos y hembras (Gottfried, 2009). Dos de las características constantes en estos estudios son el sex-ratio y la edad-ratio (Rivers et al, 2006).…”

Section: Introductionunclassified

Barbastella barbastellus (Schreber, 1774) en minas del Norte de Portugal: ¿un caso de “swarming”?

2013

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Abstract:This study investigated the visitation of an underground site by bats during the "swarming" season (September and October) of 2009, 2011 and 2012, in a mine located in the Northeast Portugal (Vila Cova mine, 850 m a.s.l.). A total of 79 bats were captured, representing 12 of the 25 bat species identified in Portugal Continental. The Western Barbastelle (Barbastella barbastellus) was the most predominant species, with 31,6% of the captures. Although the relative low number of specimens captured, the species composition and their conservation status were significant due to the presence of Critical Endangered species (Rhinolophus euryale and Myotis blythii), Vulnerable species (Rhinolophus ferrumequinun, Rhinolophus hipposideros, Myotis myotis, Myotis escalerai and Miniopterus schreibersii) and species with Data Deficient (Barbastella barbastellus and Plecotus auritus). Considering that a just 5 hours sampling effort was conducted, the peak of the nocturnal activity was 3-4 hours after sunset, with statistically significant differences between males and females in the third hour after sunset (P=0,002). In total, 75,9% of the specimens captured were males, representing a sex ratio of 3♂♂:1♀♀. In the specific case of B. barbastellus the ratio was of 2:1. The peak of captures between males and females was different along time, with females arriving later to the mine. This behavior was also verified to B. barbastellus. The differences regarding Body Condition Index (BCI) between sexes in B. barbastellus were statistically different, with females presenting higher BCI than males (P=0,015). Undoubtedly, the conservation value of "swarming" sites is of special concern for bats management strategies, especially when used by species such as B. barbastellus, characterized by high level of philopatry within their populations.Keywords: Barbastella barbastellus, bats, conservation, Portugal, "swarming".Resumen: Este trabajo investiga la visita a un refugio subterráneo por los quirópteros en la época de "swarming" (septiembre y octubre) de 2009, 2011 y 2012, en una mina localizada en el Norte de Portugal (Mina de Vila Cova, 850 m.s.n.m). Fueron capturados un total de 79 quirópteros, representando 12 de las 25 especies existentes en Portugal Continental. El murciélago de bosque (Barbastella barbastellus) fue la especie predominante con el 31,6% de las capturas. A pesar del número relativamente bajo de individuos capturados, la composición de las especies y sus estatus de conservación son significativos, incluyendo especies En Peligro Crítico (Rhinolophus euryale y Myotis blythii), Vulnerables (Rhinolophus ferrumequinun, Rhinolophus hipposideros, Myotis myotis, Myotis escalerai y Miniopterus schreibersii) y especies con Información Insuficiente (B. barbastellus y Plecotus auritus). Teniendo en cuenta que se estudiaron 5 horas, el pico de actividad fue observado entre las 3 y las 4 horas después del ocaso, con diferencias estadísticamente significativas entre machos y hembras en la tercera hora después del ocaso (P=0,002)....

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Winter Versus Summer Habitat Selection in a Threatened Ground Squirrel

et al. 2020

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Hibernation is a strategy many species employ to survive periods of thermal stress or resource shortage (e.g., harsh thermal conditions, food limitations) and habitat requirements of hibernating species may differ between summer (the active season) and winter (during hibernation). Accounting for seasonal differences in habitat affinities will help ensure that management actions are more beneficial and land-use policies are more appropriate. The northern Idaho ground squirrel (Urocitellus brunneus) is a federally listed threatened species that is in decline and hibernates for approximately 8 months per year. We collared northern Idaho ground squirrels in Adams County, Idaho from 2013-2017. The majority of northern Idaho ground squirrels we collared selected hibernacula outside of the areas they used during the active season. Furthermore, habitat features of hibernacula locations differed from habitat features of active-season areas. Hibernacula locations had greater canopy closure compared to active-season locations (36.9% and 7.0% canopy closure, respectively) and hibernaculum habitat features (particularly distance to nearest log) influenced overwinter survival. Our results suggest that recovery efforts for northern Idaho ground squirrels should include protection and management for the full range of habitat conditions used throughout summer and winter. More broadly, we emphasize the need to identify and protect habitat during all seasons because habitat requirements can differ substantially during different portions of an animal's annual cycle and effective conservation will require management of year-round habitat needs.

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Use of Underground Hibernacula by the Barbastelle (Barbastella barbastellus) Outside the Hibernation Season

Cited by 17 publications

References 27 publications

Activity pattern and fat accumulation strategy of the Natterer’s bat (Vespertilionidae, Chiroptera) swarming population indicate the exact time of male mating effort

Activity pattern and fat accumulation strategy of the Natterer’s bat (Vespertilionidae, Chiroptera) swarming population indicate the exact time of male mating effort

Barbastella barbastellus (Schreber, 1774) en minas del Norte de Portugal: ¿un caso de “swarming”?

Winter Versus Summer Habitat Selection in a Threatened Ground Squirrel

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