Reproductive condition and activity pattern of male Daubenton's bats (Myotis daubentonii) in the summer habitat

Encarnação, Jorge A.; Dietz, Markus; Kierdorf, Uwe

doi:10.1078/1616-5047-00131

Cited by 67 publications

(45 citation statements)

References 10 publications

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“…The occurrence of variations in the composition and function of the seminiferous epithelium with regard to the annual breeding cycle in bats has been described specifically for hibernating bats (Racey, 1974;Kurohmaru et al, 2002;Lee, 2003;Encarnaçã o et al, 2004;Lee and Mori, 2004;Sharifi et al, 2004). A process of spermatogenic cell degeneration in the seminiferous tubules occurs prior to hibernation, after which the spermatogenic process is restarted by elevated levels of testicular and plasma testosterone that induce an overproduction of new spermatogenic cells (Racey and Tam, 1974;Gustafson and Shemesh, 1976;Gustafson and Damassa, 1985).…”

Section: Discussionmentioning

confidence: 97%

“…Most hibernating species are monoestrous and exhibit several unique features in their reproductive cycle, such as a reproductive quiescent phase characterized by regression in seminiferous tubules where only spermatogonia and Sertoli cells are observed, prolonged sperm storage in the epididymis in males and in the uterine cornua in females, asynchrony of the spermatogenesis and copulation period, and delayed implantation in female reproductive tracts (Anand Kumar, 1965;Racey and Tam, 1974;Krutzsch and Crichton, 2000;Encarnaçã o et al, 2004;Sharifi et al, 2004). It was suggested that these peculiarities have evolved in the temperate-zone species as a result of the superimposition of the hibernation period on the reproduction (Racey, 1982).…”

Section: Introductionmentioning

confidence: 98%

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Morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of Neotropical bats

Beguelini

Moreira

Faria

et al. 2009

Journal of Morphology

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We know little about the process of spermatogenesis in bats, a great and diverse clade of mammals that presents different reproductive strategies. In the present study, spermatogenesis in six species of Neotropical bats was investigated by light microscopy. On the basis of chromatin condensation, nuclear morphology, relative position to the basal membrane and formation of the flagellum, three types of spermatogonia were recognized: dark type A (A(d)), pale type A (A(p)), and type B; the development of spermatids was divided into seven steps. With the exception of Myotis nigricans, the seminiferous epithelium cycle of the other five species studied was similar to those of other mammals, showing gradual stages by the tubular morphology method. Asynchrony was observed in the seminiferous epithelium cycle of M. nigricans, shown by overlapping stages and undefined cycles. The frequencies found in the three phases of the cycle were variable with the greatest frequency occurring in the postmeiotic phase (>50%) and the least in the meiotic phase (<10%). The similarities observed in the five species of Phyllostomidae appeared to be related to their phylogenetic relationship and shorter divergence times, whereas the differences in M. nigricans appeared to be related to its greater phylogenetic distance because the Vespertilionidae family diverged earlier.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of Neotropical bats

Beguelini

Moreira

Faria

et al. 2009

Journal of Morphology

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“…Besides energetic reasons, we suppose that time spent in roosts may concern with social activities, such as mating, since a majority of roosts in the study area contained mixed groups of sexually active males and females in the postlactation period (Lučan & Hanák, in litt.). Likewise, Encarnação et al (2004) suggest that a large proportion of matings in Daubenton's bats occurs already in the day roosts within the summer habitats.…”

Section: Foraging Timementioning

confidence: 99%

“…We attached small transmitters (0.5 g, LB-2, Holohil System, Carp, Ontario, Canada) on inter-scapular regions of bats with cyanoacrylate glue (Encarnação et al 2004). The mass of transmitters imposed 5.5 ± 0.7% (mean ± SD; n = 15) of body mass of tagged bats.…”

Section: Radio-trackingmentioning

confidence: 99%

Variability of foraging and roosting activities in adult females of Daubenton’s bat (Myotis daubentonii) in different seasons

Lučan

Radil

2010

Biologia

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We radio-tracked fifteen reproductive females (5 pregnant, 5 lactating, 5 in post-lactation) of the Daubenton's bat in summer 2005 in order to reveal the effect of reproductive state on their foraging and roosting activity. Spatial activity of females decreased from pregnancy to lactation and increased again in the post-lactation period. Overall time spent foraging did not differ among the three study periods. However, while pregnant and lactating females spent similar proportion of the night length foraging, females in the post-lactation period were foraging for shorter part of night. The frequency of nightly visits to roosts was highest during lactation but there was a trend towards shortening of particular visits during that period. All but one roost were in tree hollows excavated by woodpeckers in spatially restricted area of ca 0.7 km 2 . Tree cavities used during pregnancy were located higher on a tree trunk and had larger entrance area than the cavities used in the two later periods. Bats switched roosts every 2-3 days (range 1-8) and moved to a new roost up to 800 m apart. Pregnant females tended to switch roosts more frequently than females in the two later periods. We did not observe a significant effect of minimum nightly temperature on the activity of radio-tracked Daubenton's bats. Therefore, we suggest that observed seasonal changes in the pattern of behaviour of Daubenton's bat females were driven by their changing energetic demands rather than by some extrinsic factors (e.g. weather conditions).

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“…Chases over water bodies were documented (Wallin 1961;Rieger et al 1992;Encarnac¸ao et al 2005) and could reflect agonistic intentions. To date, most studies on roosting and/or hunting behaviour in the Daubenton's bat have explored roost selection (Rieger 1996a, b;Boonman 2000), activity patterns (Rieger 1996c;Encarnac¸ao et al 2004), use of linear landscape elements (Rieger et al 1990;Dietz and Fitzenra¨uter 1996), habitat use (Zahn and Maier 1997;Warren et al 2000) or resource partitioning (Swift and Racey 1983). A limited diffusion in specific zones over several years of 'resident' males Daubenton's bats has been reported (Encarnac¸ao et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Roost and hunting site fidelity of female and juvenile Daubenton's bat Myotis daubentonii (Kuhl, 1817) (Chiroptera: Vespertilionidae)

Kapfer¹,

Rigot²,

Holsbeek³

et al. 2008

Mammalian Biology

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We investigated roosting and hunting site fidelity of Daubenton's bats Myotis daubentonii (Kuhl, 1817) Roosting behaviour and hunting activity over ponds of adult females and juveniles were monitored using radiotelemetry. Eighteen roosts were located, all in natural cavities. The bats occupied a limited number of trees located in a specific and small roosting area. This roost aggregation was not linked to the distribution of hollow trees. Furthermore, whereas all 11 ponds in the study area were exploited by Daubenton's bats, monitored individuals were limited to two ponds to which they showed high fidelity. These two ponds were not the closest to the roosting area. Overall, these results show that at least for the time we conducted our experiment, female and juvenile Daubenton's bats are highly faithful to specific roosting and hunting grounds.

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Reproductive condition and activity pattern of male Daubenton's bats (Myotis daubentonii) in the summer habitat

Cited by 67 publications

References 10 publications

Morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of Neotropical bats

Morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of Neotropical bats

Variability of foraging and roosting activities in adult females of Daubenton’s bat (Myotis daubentonii) in different seasons

Roost and hunting site fidelity of female and juvenile Daubenton's bat Myotis daubentonii (Kuhl, 1817) (Chiroptera: Vespertilionidae)

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