+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Reproduction in the bats Vespadelus vulturnus, V. regulus and V. darlingtoni (Microchiroptera: Vespertilionidae) in coastal South-eastern Australia

Reproduction in the bats Vespadelus vulturnus, V. regulus and V. darlingtoni (Microchiroptera: Vespertilionidae) in coastal South-eastern Australia

Australian Journal of Zoology, 411: 21-35

The sequence of reproductive and associated events that occurs in Vespadelus vulturnus is similar to those that are common to hibernating vespertilionids and rhinolophids. Females become sexually mature in their first year, whereas males do not undergo their first spermatogenesis until their second year. Both sexes accumulate fat deposits in late summer and autumn, but females begin to do this earlier and accumulate more than males. These deposits are gradually depleted over the course of winter. In autumn females produce a follicle of hibernation, the rupture of which is delayed until spring, when the resultant secondary oocyte is fertilised by sperm stored in the female reproductive tract. Females are monoestrous. Both ovaries are functional, although implantation occurs only in the right uterine horn. Males also undergo an annual cycle. Plasma androgen concentration and seminiferous tubule diameter reach a peak in late summer, with subsequent release of spermatozoa, but the accessory sex glands do not reach maximum size until late autumn. Sperm are present in the epididymides of males more than one year of age for the duration of winter. Male V. vulturnus arouse from torpor during winter more frequently than females. It is hypothesised that they do this in order to copulate, even though females store sperm and a copulatory plug forms in the vagina after insemination. The behaviour of the males can be explained by three factors: (1) some first-year females are not in oestrus at the beginning of winter, (2) some females with sperm stores depleted or absent are caught flying during winter and (3) in some females copulatory plugs are voided long before fertilisation occurs, thereby removing the barrier to subsequent insemination. Vespadelus regulus and V. darlingtoni appear to have a reproductive cycle similar to that of V. vulturnus.

(PDF emailed within 0-6 h: $19.90)

Accession: 021674239

Download citation: RISBibTeXText

DOI: 10.1071/zo9930021

Related references

Reproduction in the bats Vespadelus vulturnus, Vespadelus regulus and Vespadelus darlingtoni (Microchiroptera: Vespertilionidae) in coastal south-eastern Australia. Australian Journal of Zoology 41(1): 21-35, 1993

Range extension of the little forest bat Vespadelus vulturnus (Chiroptera: Vespertilionidae) into a semi-arid area of central Queensland, Australia. Australian Zoologist. April; 304: 392-397, 1998

Field identification of female little brown bats Vespadelus spp. (Chiroptera: Vespertilionidae) in South Australia. Records of the South Australian Museum (Adelaide). July; 301: 29-33, 1997

Movements of banded bats microchiroptera vespertilionidae in mumbulla state forest near bega new south wales australia. Australian Mammalogy 11(1-2): 167-170, 1988

Reproduction in female Eptesicus regulus (Thomas) (Vespertilionidae), in south-western Australia. Australian Journal of Zoology, 262: 257-267, 1978

Day roost selection by female little forest bats (Vespadelus vulturnus) within remnant woodland on Phillip Island, Victoria. Wildlife Research 32(2): 183-191, 2005

Geographic variation in the echolocation calls of Vespadelus spp. (Vespertilionidae) from New South Wales and Queensland, Australia. Acta Chiropterologica 4(2): 201-215, 2002

Reproduction in female eptesicus regulus vespertilionidae in southwestern australia. Australian Journal of Zoology 26(2): 257-268, 1978

Factors affecting choice of diurnal roost site by tree hole bats microchiroptera in south eastern australia. Australian Wildlife Research 14(4): 459-474, 1987

Day roost of little pied bat Chalinolobus picatus (Gould) (Microchiroptera: Vespertilionidae) in north inland New South Wales, Australia. Australian Zoologist. December; 332: 166-167, 2005

Records of eptesicus vulturnus new record vespertilionidae chiroptera from the alice springs area northern territory australia. Australian Mammalogy: 69-70, 1982

Roost preferences and foraging ranges of the eastern forest bat Vespadelus pumilus under two disturbance histories in northern New South Wales, Australia. Australian Journal of Ecology 25(4): 352-367, 2000

Accidental importation of an Australian bat (Mammalia: Chiroptera: Vespadelus vulturnus ) into New Zealand. New Zealand Journal of Zoology 25(4): 455-456, 1998

Torpor and thermal energetics in a tiny Australian vespertilionid, the little forest bat (Vespadelus vulturnus). Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology 175(7): 479-486, 2005

Morphological study of the heart innervation of bats Myotis daubentoni and Eptesicus serotinus (Microchiroptera: Vespertilionidae) during hibernation. European Journal of Morphology 38(3): 195-205, 2000