Wyniki wyszukiwania

1

Choosing the 'correct' bat detector - a reply

100%

Corben C., Fellers G. M.

Acta Chiropterologica

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2001

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tom 03

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nr 2

2

The diet of Myzopoda schliemanni, a recently described Malagasy endemic, based on scat analysis

88%

Rajemison B., Goodman S. M.

Acta Chiropterologica

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2007

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tom 09

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nr 1

3

Hard pellets from bats of Turkey

88%

Whitaker,Jr. J. O., Karatas A.

Acta Chiropterologica

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2010

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tom 12

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nr 1

4

Swarming of Myotis mystacinus and other bat species at high elevation in the Tatra Mountains, southern Poland

75%

Piksa K.

Acta Chiropterologica

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2008

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tom 10

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nr 1

This paper reports a study of the visitation of bats to Great Litworowa Cave (1,907 m a.s.l., Tatra Mts., southern Poland) during summer and autumn 1999–2005. A total 5,608 bats representing 11 of Poland's 25 species were captured. Myotis mystacinus predominated. Its activity at all times was high. However, the species composition and number of other bats changed seasonally. Swarming activity lasted between July and November, peaking in late July and August. Nightly activity peaked between 22.00 and 02.00 hrs and then gradually decreased toward dawn. Strong male bias was observed. Myotis mystacinus showed regular changes in sex and age ratios. Rare species such as M. bechsteinii, M. emarginatus, and Vespertilio murinus were recorded. This cave is the highest locality of M. bechsteinii and M. brandtii in Europe. Some behavioural observations including copulation, drinking and daylight activity were recorded. The role of swarming activity is discussed in light of the findings. Some observations suggest that this activity of bats is connected with mating; some other observations provide evidence that the function of swarming is also to facilitate the location of mates and/or to assess suitable hibernacula.

5

The influence of riparian vegetation on the distribution and abundance of bats in an African savanna

75%

Monadjem A., Reside A.

Acta Chiropterologica

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2008

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tom 10

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nr 2

Riparian habitats are known to be important for bats across the world, however this is largely unstudied in Africa. We investigated the community structure of bats in riparian areas and the surrounding savanna landscape in Swaziland's lowveld using mist nets and a harp trap. We found riparian sites overall had higher bat activity, diversity, species richness and abundance. One species (Epomophorus wahlbergi) accounted for 52.6% of captures. Seasonality had no effect on overall captures, nor did distance from nearest riparian habitat for savanna sites. Echolocation guilds were correlated with vegetation characteristics, with CF (constant frequency), FM (steep frequency-modulated) and FM-QCF (broadband FM) bats more frequently captured at sites with denser undergrowth than QCF (quasi-constant frequency or narrowband FM) bats; conversely, QCF bats were more frequently caught at sites with lower canopy cover than other bats. Our findings suggest that although bats discriminate between microhabitats, they do not respond to larger-scale habitat features in the way that other taxa, such as birds, are found to. In conclusion it appears that riparian areas are important foraging sites for bats within African savannas.

6

Bats (Chiroptera) of the Silesian Beskid Mountains

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Myslajek R., Kurek K., Szura C., Nowak S., Orysiak P.

Fragmenta Faunistica

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2007

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tom 50

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nr 1

7

The discovery of Wroughton's free-tailed bat Otomops wroughtoni (Chiroptera: Molossidae) in Cambodia

75%

Walston J., Bates P.

Acta Chiropterologica

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2001

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tom 03

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nr 2

8

Urban drainage systems as important bat hibernacula in Poland

75%

Wojtaszyn G., Rutkowski T., Stephan W., Kozirog L.

Fragmenta Faunistica

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2013

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tom 56

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nr 1

The results of winter checks in drainage systems of three cities in northern Poland are presented. The analysis of importance of this type of roosts for hibernating bats is conducted. In total 7524 bats were counted in the winter 2013: 3412 individuals in Olsztyn, 3403 in Piła and 709 in Koszalin. Higher number of bats than in rainwater sewers of Olsztyn and Piła was observed in Nietoperek Reserve only. Six bat species were recorded in checked rainwater sewage systems: Myotis nattereri, Myotis daubentonii, Myotis myotis, Plecotus auritus, Barbastella barbastellus and bats from Myotis mystacinus complex. Urban sewage systems are important especially for Myotis nattereri. This species dominates in all checked objects, with 3314 individuals in Olsztyn, 2532 in Piła and 597 in Koszalin. Given the sheer size of the drainage systems, this type of roosts may belong to the most important hibernation sites, particularly for M. nattereri and M. daubentonii.

9

Roosts and activity areas of Nyctinomops macrotis in northern Arizona

75%

Corbett R. J. M., Chambers C. L., Herder M. J.

Acta Chiropterologica

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2008

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tom 10

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nr 2

Female big free-tailed bats Nyctinomops macrotis have been captured over water in northern Arizona in high elevation (> 2,400 m) forests and low elevation (1,500 m) desert scrub vegetation. We hypothesized that roost sites were in vertical walls of cliffs that were up to 25 km away from capture sites given the flight capability of these bats. During summer 2005 we captured eight females over ponds and attached radio transmitters to locate day roosts. We also identified locations used during nightly movements from 1 to 6 nights of radio tracking. We found three day roosts for seven bats; average distance (± SE) from a capture site to a roost was 12.1 ± 3.0 km. Roosts were small maternity colonies used by ≥ four N. macrotis in cracks or crevices in upper portions of vertical cliffs and faced south or southeast. Average dimensions for ponds where we found N. macrotis were 24 × 46 m, larger than the average pond size (14 × 19 m) where we did not capture this species. We identified 73 night locations for five N. macrotis and for one individual with 32 night locations calculated a 95% activity area (minimum convex polygon method) of 29,590 ha. Straight line distance between successive locations averaged 5.1 ± 0.8 km. Maximum distance detected from roost averaged 25.3 ± 4.9 km. We conservatively estimated a maximum flight speed of 61 km per hour. Most locations were in desert scrub vegetation but three bats moved to higher elevations, using pinyon-juniper (Pinus edulis-Juniperus spp.) woodland and ponderosa pine (Pinus ponderosa) forest. The maternity roosts we located for N. macrotis were remote, difficult to access, and within protected areas (national parks) in northern Arizona; however, foraging areas and ponds used for drinking are managed by different public or private agencies. These features are not as well protected and could be critically important in this arid environment.

10

Low genetic variability of Rhinolophus mehelyi (Mehely's horseshoe bat) in Romania

75%

Dragu A., Borissov I.

Acta Theriologica

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2011

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tom 56

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nr 4

Rhinolophus mehelyi (Mehely's horseshoe bat) is a vulnerable species with an increasingly fragmented distribution. In Romania, populations of R. mehelyi have experienced a dramatic decline over the past 50 years, and the current population size is estimated at only 100 adult individuals inhabiting almost exclusively the Limanu cave. In the present study, we investigated the genetic consequences of population decline for the viability of the remaining population of R. mehelyi in Romania. We sequenced and analyzed a 359-bp fragment of the mitochondrial control region from the only known Romanian population and compared it with two geographically close colonies from Bulgaria. A single haplotype was found in the Romanian population compared to 10 in the Bulgarian population, suggesting genetic isolation.

11

Epididymal sperm storage in Rickett's big-footed bat (Myotis ricketti)

75%

Wang Z., Shi Q. X., Wang Y. N., Wang Y. L., Zhang S. Y.

Acta Chiropterologica

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2008

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tom 10

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nr 1

Spermatozoa were present in the cauda epididymidis of male Rickett's big-footed bat, Myotis ricketti, from late September to early April but absent from the testes from mid November until late August. Males thus store spermatozoa in the cauda epididymidis for 4.5–6.5 months of the year. Assessments of sperm motility, movement pattern and computer-assisted sperm analysis (CASA) were carried out on spermatozoa which had been stored for over 3.5 months in the cauda epididymidis. The motility of sperm stored for the same period of time and taken from a male which died over 9 h before assessment was 86%. Four kinds of culture media were screened for their suitability for future studies of sperm motility, and a low calcium minimal capacitation medium and a hamster fertilization medium were selected. Serum testosterone (T) concentration increased dramatically in September and began to fall in October, before returning to baseline for the remainder of winter. These results indicate that high levels of T are required for spermatogenesis and spermiogenesis but not for sperm storage.

12

Do decibels matter? A review of effects of traffic noise on terrestrial small mammals and bats

75%

Bednarz P. A.

Polish Journal of Ecology

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2020

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tom 68

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nr 4

13

Genetic diversity and phylogeography of the greater mouse-tailed bat Rhinopoma microphyllum (Brunnich, 1782) in the Levant

75%

Levin E., Yom-Tov Y., Barnea A., Huchon D.

Acta Chiropterologica

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2008

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tom 10

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nr 2

The greater mouse-tailed bat (Rhinopoma microphyllum) possesses a large geographical range, covering most of the arid and warm areas of the Old World. We studied the genetic variability of this species using two mitochondrial markers (the cytochrome b gene and the control region), from several Israeli colonies and from over most of the species' range. Our results show that the cytochrome b sequences, unlike those of the control region, are too conserved to separate among R. microphyllum populations. Based on the control region sequences, a high level of sequence similarity was found within the Israeli population. Three clades were observed over the species' range: Oriental, Intermediate and Palaearctic. This division supports most of the traditional taxonomy of the species. The Israeli population, which belongs to the Palaearctic clade, was found to be isolated from the Oriental and Intermediate clades. We suggest that the colonization of the greater mouse-tailed bat in the Levant occurred from African populations during the late Pleistocene, when many Saharan plants and animals penetrated the northern part of the Great Rift Valley.

14

Co-occurrence of ectoparasites (Insecta and Arachnida) on bats (Chiroptera) in an Atlantic Forest remnant, Southeastern Brazil

75%

Captivo Lourenco E., Costa Gomes L. A., de Oliveira Viana A., Famadas K. M.

Acta Parasitologica

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2020

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tom 65

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nr 3

15

Quantifying phyllostomid bats at different taxonomic levels as ecological indicators in a disturbed tropical forest

75%

Castro-Luna A. A., Sosa V. J., Castillo-Campos G.

Acta Chiropterologica

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2007

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tom 09

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nr 1

With the aim of quantitatively evaluating the usefulness of phyllostomid bats as ecological indicators, we compared intra-family levels and feeding guilds between tropical old-growth forest and patches of secondary vegetation growing where the land had been used for shifting agriculture. There were significant differences between vegetation types in bat species composition, with the frugivore guild most abundant in secondary vegetation and the animalivore guild most abundant in the old-growth forest. These results are congruent with the findings for other Neotropical zones and appear to be associated with the type of soil management that allows secondary vegetation to grow. Using the Indicator Value method, two subfamilies, five genera and five species were found to have a significant indicator value. However, these numbers only represent a small proportion of the five subfamilies, 20 genera and 28 species recorded, indicating that under the disturbance conditions that characterize the study area, phyllostomid bats were poor ecological indicators. Even so, some species and subfamilies are useful as disturbance detectors.

16

Habitat selection by Geoffroy's bats (Myotis emarginatus) in a rural Mediterranean landscape: implications for conservation

75%

Flaquer C., Puig-Montserrat X., Burgas A., Russo D.

Acta Chiropterologica

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2008

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tom 10

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nr 1

Most of the little information available on the foraging ecology of the threatened Geoffroy's bat Myotis emarginatus refers to areas outside the Mediterranean Basin. In this study, we analysed habitat selection by this species in a typical Mediterranean landscape. We radio-tracked a breeding colony (adults and juveniles) in the Iberian Peninsula and analysed habitat selection patterns. Although we confirmed the species' preference for forest, olive groves also appeared an important foraging habitat for both adults and juveniles. Juveniles proved to be less mobile than adults, moving on average 1.6 km less than adults in displacements to foraging sites and preferred more accessible habitats. We highlight here the importance of traditionally managed olive groves as foraging sites for this threatened bat. The ripping-up of ancient olive groves and their replacement by intensively managed cropland, urban areas or shrubland represents a significant threat for this vulnerable species in Mediterranean landscapes.

17

The influence of residual tree patch isolation on habitat use by bats in central British Columbia

75%

Swystun M. B., Psyllakis J. M., Brigham R. M.

Acta Chiropterologica

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2001

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tom 03

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nr 2

One forest management practice associated with logging aimed at contributing to the maintenance of biodiversity is to leave residual tree patches within cut blocks. Using Anabat bat-detectors we monitored bat activity along residual tree patch edges and clear-cut edges associated with recent clear-cuts in north-central British Columbia. We tested two hypotheses, (1) relative bat activity would be higher on the clear-cut edge than the residual patch edge, (2) relative bat activity would decrease on the residual patch edge with increasing isolation from the clear-cut edge. We sampled six pairs of edges and found no significant difference in bat activity between patch and clear-cut edges. We found a significant but non-linear relationship between relative bat activity on the patch edge with increasing patch isolation. Bat activity on the residual patch edge was highest at intermediate levels of patch isolation and lower both at patch edges close to, and highly isolated from the clear-cut edge. We postulate that the reason for this relationship is that patches act as windbreaks collecting high densities of insects making them good foraging areas but this benefit is coupled with an increased risk of prédation associated with crossing large gaps. At low levels of patch isolation bats may perceive residual patches and adjacent clear-cut edges as a continuous foraging area and thus, bat activity is evenly distributed throughout both habitats. In summary, our data indicate that patches provide localized habitat for foraging bats, however, foraging areas are only one habitat component required by bats and it remains uncertain if patches also offer suitable roosting opportunities.

18

Rousettus aegyptiacus (E. Geoffroy St. Hilaire, 1810) and Pipistrellus anchietae (Seabra, 1900), justified emendations of original spellings

75%

Kock D.

Acta Chiropterologica

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2001

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tom 03

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nr 2

19

Coexistence of Rhinolophus affinis and Rhinolophus pearsoni revisited

75%

Jiang T., Lu G., Sun K., Luo J., Feng J.

Acta Theriologica

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2013

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tom 58

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nr 1

The investigation of mechanism of species coexistence promotes understanding of the mechanistic processes behind community ecology and ecosystem functions. Niche theory declares that species coexistence within a community must partition the resources of their environment. Two sympatric and morphologically similar bat species, Rhinolophus affinis and Rhinolophus pearsoni, provided a unique opportunity to test the causal mechanism of coexistence. Previous study showed that their coexistence was promoted not by the trophic and spatial niche differentiation but the relatively high abundance of prey resources, which was not in accord with the prediction of niche theory. Here, therefore, we reanalyzed the dietary composition by fecal analysis and surveyed the feeding time of both species. Our results showed that R. affinis and R. pearsoni hunt mainly mostly on Coleoptera and Lepidoptera, and there was a very high overlap (0.84) of trophic niche between the two species. However, significant difference in the duration of the activity period between both species was detected, which illustrated that temporal partitioning of prey resource use facilitated their coexistence. Additionally, our work highlighted the importance of integration of the traditional methods and next-generation sequencing methods for identifying dietary composition of carnivores, and suggested that ongoing studies of species coexistence must consider simultaneously multiple niche axes.

20

Fishing behaviour in the long-fingered bat Myotis capaccinii (Bonaparte, 1837): an experimental approach

75%

Aihartza J., Almenar D., Salsamendi E., Goiti U., Garin I.

Acta Chiropterologica

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2008

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tom 10

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nr 2

To study the fishing behaviour of Myotis capaccinii, we performed an experiment in a flight tent containing an artificial pond. We recorded the behaviour of two groups of bats — eight individuals from two different roosts — using IR video camcorders and ultrasound detectors, and evaluated diet by analyzing faeces. Nightly, increasing amounts of fish were released in the pond. Our data show that M. capaccinii is able to exhibit fishing behaviour when fish occur in high densities in shallow waters, gaffing live fish from the water using their hind feet. They were attracted neither by dead fish floating, nor by ripples made by fishes feeding on the water surface. Bats showed a specific fishing behaviour with two main foraging patterns: A) long series of circular flights, skimming along the water and dipping in softly twice or three times in each roundabout; B) long figure-eight loops with bats flying faster and higher, swooping down on the centre of the pond, where they snapped their hind feet hard into the water. Compared with the echolocation calls used to catch insects from the water's surface in the wild, terminal buzzes were incomplete during the dips made to fish. Buzz II were always lacking, and buzz I had much longer inter-pulse intervals. This suggests that they were not pursuing specific targets but dipping randomly. We propose a scenario in which fishing behaviour occurs in the wild, linked to the seasonal drought of small ponds, marshes, or channels where large numbers of small fish become readily available and thus a profitable resource.

Ograniczanie wyników

Choosing the 'correct' bat detector - a reply

The diet of Myzopoda schliemanni, a recently described Malagasy endemic, based on scat analysis

Hard pellets from bats of Turkey

Swarming of Myotis mystacinus and other bat species at high elevation in the Tatra Mountains, southern Poland

The influence of riparian vegetation on the distribution and abundance of bats in an African savanna