geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Estimation of food intake and ingested energy in Daubenton's bats (Myotis daubentonii) during pregnancy and spermatogenesis


, : Estimation of food intake and ingested energy in Daubenton's bats (Myotis daubentonii) during pregnancy and spermatogenesis. European Journal of Wildlife Research 52(4): 221-227

We studied food intake of and estimated ingested energy in female and male Myotis daubentonii during the periods of pregnancy (period 1, 8 May-4 June) and of intense spermatogenetic activity (period 2, 24 July-22 August) over 8 years (1996-2003) in central Germany. We used radiotelemetry to determine the time spent foraging and marked animals with chemiluminescent light-sticks to determine prey attack rates. Body length, body mass, moisture content, and caloric content of chironomids, the main prey of Daubenton's bats, were measured to estimate the nightly food intake and, in consequence, energy intake. Pregnant females spent significantly more time foraging than males during period I and females during the post-lactation period. In contrast, male foraged longer during the period of highest spennatogenetic activity than during late spring and also significantly longer than post-lactating females. Based on a mean number of 8.3 prey attacks per minute, the time spent foraging, and a capture success rate of either 50 or 92%, calculated intake values with a feeding rate of 7.6 insects per minute (=92% capture success) were more consistent with literature data for other insectivorous bats than that of values calculated on the basis of a capture success rate of 50%. In the high capture-success model, calculated insect intake of female bats was 8.0 g during pregnancy and 4.9 g per day during post-lactation, providing 5.0 and 3.0 kJ of ingested energy per gram body mass per day. Calculated intake of male bats was 3.6 g insects per day during late spring and 8.0 g during period of intensive spermatogenesis, providing 2.6 and 5.7 U of ingested energy per gram body mass.

US$19.90

DOI: 10.1007/s10344-006-0046-2


Other references

Ammar, M.S.; E.D.eb, A.A., 1992: Air microflora inside Khufu pyramid in the absence and presence of 1500 visitors. The air microflora at 3 sites inside the Khufu pyramid was studied on one day in Sept. 1990 before (08.00 h) and during (12.30 h) the visit of 1500 visitors. Mean total viable bacteria (TVB) counts before the visit were 14 in the Queen's room...

Litvinova A.N.; Lukhanina E.P., 1980: Responses of the neurons of the caudate nucleus of the cat to the presentation of audible clicks in a chronic experiment. Background and evoked activities of the caudate nucleus neurons to repetitive auditory clicks were recorded extracellularly in partially restrained cats. Four types of background neuronal activity were distinguished. Of recorded units, 44% altered...

Leiri, F., 1949: The acoustic function of the inner ear. The sound perception in the inner ear is mediated by relay devices which in structure and manner of acting resemble loudspeakers, electrodynamic and capacitive, in radio and sound film technic of today. The electric power for the "microphones...

Tanino, T.; Kurihara, K., 1982: Studies on electrically evoked pupillary reflex. II. Dynamics of the direct reflex and the consensual reflex. Nippon Ganka Gakkai Zasshi 86(10): 1479-1484

Levin, R.P., 1992: A new tool for periodontics. Dental Economics - Oral Hygiene 82(6): 69-70, 72, 74

Quast, M., J.; Neumeister, H.; Ezell, E., L.; Budelmann, B., U., 2001: MR microscopy of cobalt-labeled nerve cells and pathways in an invertebrate brain (Sepia officinalis, Cephalopoda). This article describes a novel application of contrast-enhanced MR microscopy to trace nerve cells and pathways through small invertebrate brains. Using the cuttlefish Sepia officinalis (Cephalopoda) as a model, the cells and pathways of one of th...

Anonymous, 2002: Agronomic results from the new maize hybrids registered in 2002. The maize hybrids registered in 2002 are grouped in 6 classes: very early (FAO 200), early (FAO 300), medium early (FAO 400), medium (FAO 500), medium late (FAO 600) and late (FAO 700). Information is tabulated on the companies distributing the hy...

Elphick, L.M.; Lee, S.E.; Child, E.S.; Prasad, A.; Pignocchi, C.; Thibaudeau, Sébastien.; Anderson, A.A.; Bonnac, L.; Gouverneur, Véronique.; Mann, D.J., 2009: A quantitative comparison of wild-type and gatekeeper mutant cdk2 for chemical genetic studies with ATP analogues. Chemical genetic studies with enlarged ATP binding sites and unnatural ATP analogues have been applied to protein kinases for characterisation and substrate identification. Although this system is becoming widely used, there are limited data avail...

Andersen, H.O.; Sprogoe Jakobsen, U.; Kristensen, T., 2000: Antibody identification A comparison of two column agglutination techniques. Vox Sanguinis 78(Suppl 1): P086, July

Al-Fadhli, R.; Tulandi, T., 2004: Laparoscopic abdominal cerclage. Cervical cerclage is an effective treatment of cervical incompetence. It is conventionally done by laparotomy approach. Laparoscopic abdominal cerclage is a less invasive technique that could replace the laparotomy technique. Laparoscopic abdomina...