Cytogenetic Investigations in Emballonuroidea. III. Extensive Chromosomal Reorganization Characterizes the Karyotype of Saccopteryx bilineata

2020 ◽  
Vol 22 (1) ◽  
pp. 49
Author(s):  
Marianne Volleth ◽  
Stefan Müller ◽  
Simone Sommer ◽  
Pablo Santos
Keyword(s):  
Saccopteryx Bilineata

A histological examination of the holding sacs and glandular scent organs of some bat species (Emballonuridae, Hipposideridae, Phyllostomidae, Vespertilionidae, and Molossidae)

2000 ◽  
Vol 78 (4) ◽  
pp. 613-623 ◽  
Author(s):  
William MR Scully ◽  
M B Fenton ◽  
A SM Saleuddin
Keyword(s):  
Electron Microscope ◽  
Sexual Dimorphism ◽  
Sebaceous Glands ◽  
Microscope Examination ◽  
Scent Gland ◽  
Light Microscope Level ◽  
Histological Techniques ◽  
Saccopteryx Bilineata ◽  
The Face ◽  
Scanning Electron

Using histological techniques at the light-microscope level, we examined and compared structure and sexual dimorphism of the wing sacs and integumentary glandular scent organs of 11 species of microchiropteran bats. The antebrachial wing sacs of the Neotropical emballonurids Peropteryx macrotis, Saccopteryx bilineata, and Saccopteryx leptura differed in size and location but lacked sudoriferous and sebaceous glands, confirming that they were holding sacs rather than glandular scent organs. Glandular scent organs from 11 species consisted of sebaceous and (or) sudoriferous glands in emballonurids (P. macrotis, S. bilineata, S. leptura, Taphozous melanopogon, Taphozous nudiventris), hipposiderids (Hipposiderous fulvus, Hipposiderous ater), the phyllostomid Sturnira lilium, the vespertilionid Rhogeessa anaeus, and molossids (Molossus ater and Molossus sinaloe). Glandular scent organs were located on the face (H. fulvus, H. ater), gular region (S. bilineata, P. macrotis, T. melanopogon, M. ater, M. sinaloe), chest (T. nudiventris), shoulder (S. lilium), or ears (R. anaeus). Glandular scent organs showed greater similarities within than between families, and typically were rudimentary or lacking in females. Scanning electron microscope examination revealed that the hairs associated with glandular areas of male T. melanopogon were larger and had a different cuticular-scale pattern than body hairs. These were osmetrichia, hairs specialized for holding and dispersing glandular products. In S. lilium, hairs associated with the shoulder scent-gland area were larger than body hairs but similar in cuticular-scale pattern.

Echolocation beam shape in emballonurid bats, Saccopteryx bilineata and Cormura brevirostris

2012 ◽  
Vol 66 (11) ◽  
pp. 1493-1502 ◽  
Author(s):  
Lasse Jakobsen ◽  
Elisabeth K. V. Kalko ◽  
Annemarie Surlykke
Keyword(s):  
Beam Shape ◽  
Saccopteryx Bilineata

Predictable timing of oestrus in the tropical bat Saccopteryx bilineata living in a Costa Rican rain forest

2011 ◽  
Vol 27 (2) ◽  
pp. 121-131 ◽  
Author(s):  
Sabine Greiner ◽  
Franz Schwarzenberger ◽  
Christian C. Voigt
Keyword(s):  
Climatic Factors ◽  
Costa Rican ◽  
Seasonal Reproduction ◽  
Female Reproduction ◽  
Short Term ◽  
Saccopteryx Bilineata ◽  
Progesterone Metabolites ◽  
Equatorial Climate ◽  
The Tropics

Abstract:Many tropical mammals reproduce seasonally, although the circum-equatorial climate is more stable and less seasonal than that of temperate zones. The mechanisms underlying seasonal reproduction in the tropics remain enigmatic. Female reproduction and its relation to environmental factors were investigated in the Neotropical bat species Saccopteryx bilineata. Colonies consist of year-round stable groups of several females that are defended each by an adult male. Females give birth to a single offspring each year and it is suggested that mating is restricted to November and December. In this study, it was asked whether females of a Costa Rican colony come into oestrus around the same time each year and whether oestrus times are synchronized. Oestrogen and progesterone metabolites were monitored from faeces between October and January in four years. Oestrus was identified in 32 females. In addition, climatic factors such as rainfall and temperature were monitored at the study site. Results indicate that (1) females exhibit monoestry, (2) oestrus dates cluster around the first half of December, (3) reproduction is strongly seasonal and highly predictable and (4) oestrus times are possibly influenced by long-term cues like photoperiod and short-term cues like sudden changes in rainfall and temperature.

scholarly journals Responsiveness to conspecific distress calls is influenced by day-roost proximity in bats ( Saccopteryx bilineata )

2016 ◽  
Vol 3 (5) ◽  
pp. 160151 ◽  
Author(s):  
Maria Eckenweber ◽  
Mirjam Knörnschild
Keyword(s):  
Group Composition ◽  
Playback Experiments ◽  
Distress Call ◽  
Social Relevance ◽  
The Social ◽  
Saccopteryx Bilineata ◽  
Distress Calls ◽  
Foraging Site ◽  
Physical Distress ◽  
Mobbing Behaviour

Distress calls signal extreme physical distress, e.g. being caught by a predator. In many bat species, distress calls attract conspecifics. Because bats often occupy perennial day-roosts, they might adapt their responsiveness according to the social relevance in which distress calls are broadcast. Specifically, we hypothesized that conspecific distress calls broadcast within or in proximity to the day-roost would elicit a stronger responsiveness than distress calls broadcast at a foraging site. We analysed the distress calls and conducted playback experiments with the greater sac-winged bat, Saccopteryx bilineata , which occupies perennial day-roosts with a stable social group composition. S. bilineata reacted significantly differently depending on the playback's location. Bats were attracted to distress call playbacks within the day-roost and in proximity to it, but showed no obvious response to distress call playbacks at a foraging site. Hence, the bats adapted their responsiveness towards distress calls depending on the social relevance in which distress calls were broadcast. Distress calls within or in proximity to the day-roost are probably perceived as a greater threat and thus have a higher behavioural relevance than distress calls at foraging sites, either because bats want to assess the predation risk or because they engage in mobbing behaviour.

EXTRA-HAREM PATERNITY IN THE WHITE-LINED BAT SACCOPTERYX BILINEATA (EMBALLONURIDAE)

Behaviour ◽  
1999 ◽  
Vol 136 (9) ◽  
pp. 1173-1185 ◽  
Author(s):  
Otto Von Helversen ◽  
Christian Voigt ◽  
Frieder Mayer ◽  
Gerald Heckel
Keyword(s):  
Reproductive Success ◽  
Female Choice ◽  
High Stability ◽  
Group Composition ◽  
High Potential ◽  
The Other ◽  
Spatial Proximity ◽  
Harem Size ◽  
Microsatellite Typing ◽  
Saccopteryx Bilineata

AbstractWe studied the paternity in a colony of the harem-polygynous white-lined bat Saccopteryx bilineata by microsatellite typing and compared the data with group composition and stability. Although we recorded a high stability for harem groups, neither spatial proximity of males to harem females nor harem ownership allowed us to predict the paternity of the next year's harem offspring. Eight out of 28 juveniles were fathered by holders of the harem in which they were born, while the other 20 represent Extra-Harem-Young (EHY). 50% of EHY were fathered by males from outside the colony and 50% by other harem holders or peripheral males of the colony. On average, reproductive success of harem holders (1.2 offspring/year) was higher compared with peripheral males (0.4 offspring/year). Harem size seemed not to influence reproductive success of harem holders. Although maintaining of a territory seems to be costly for a harem male, his ability to control the females of his harem may be restricted; instead female Saccopteryx bilineata appear to have a high potential for female choice.

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