Differential Rates of Fetal Growth in Two Successive Pregnancies in the Emballonurid Bat, Taphozous longimanus Hardwicke

Krishna, Amitabh; Dominic, C. J.

doi:10.1095/biolreprod27.2.351

Cited by 24 publications

(16 citation statements)

References 9 publications

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“…Retardation or acceleration in the rate of embryonic development by environmental temperatures in heterothermic bats, which is a peculiar phenomenon in mammals (Racey, 1981(Racey, ,1982, has been examined experimentally in brown bats, Myotis myotis (Eisentraut, 1937) and pipistrelles, Pipistrellus pipistrellus (Racey, 1969(Racey, , 1973, and reported for horseshoe bats, Rhinolophus hipposideros (Kolb, 1950), pipistrelles, P. pipistrellus (Racey & Swift, 1981) and tomb bats, Taphozous longimanus (Krishna & Dominic, 1982) under natural conditions.…”

Section: Discussionmentioning

confidence: 99%

Effects of elevated temperatures on the embryonic development and corpus luteum activity in the Japanese long-fingered bat, Miniopterus schreibersii fuliginosus

Uchida¹,

Inoue²,

Kimura³

1984

Reproduction

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Gravid female Japanese long-fingered bats were kept in captivity without hibernation at elevated temperatures (23-25 degrees C) in winter. The embryonic growth rate was accelerated and consequently parturition was advanced by a period equivalent to that of exclusion from hibernation as compared with that in the wild population. The corpus luteum became active, as indicated by an increase in the 'light' lutein cells in an experimental bat pregnant with a 15-mm embryo, but was less active (more 'dark' cells) in 2 hibernating control bats with an implanting blastocyst.

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Section: Discussionmentioning

confidence: 99%

Effects of elevated temperatures on the embryonic development and corpus luteum activity in the Japanese long-fingered bat, Miniopterus schreibersii fuliginosus

Uchida¹,

Inoue²,

Kimura³

1984

Reproduction

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“…The detailed reproductive patterns have been described in the emballonurid bat, T. longimanus from India (Gopalakrishna 1955, Krishna andDominic 1982a). T. longimanus shows geographic variation in the reproductive patterns.…”

mentioning

confidence: 99%

Secretory Processes in Follicular Cells of the Thyroid Gland of the Indian Sheath-tailed Bat, Taphozous longimanus (Hardwicke): A Ultrastructural Study

Nerkar

Gadegone

2011

CYTOLOGIA

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SummaryThe aim of present study was to compare the ultrastructural changes in thyroid gland during different phases of the reproductive cycle of Taphozous longimanus. Thyroid gland shows marked seasonal variation in weight, quantity of colloid and follicular epithelial height and ultrastructural characteristics. During estrus, the thyroid gland is composed of small and medium follicles. The follicular cells contain mitochondria with lamellar cristae, well developed rough endoplasmic reticulum and Golgi complex and large number of dense bodies. During early and midpregnancy, thyroid gland composed mostly of small follicles. The characteristics of the follicular cells are the well developed rough endoplasmic reticulum, Golgi apparatus and numerous dense granules. Colloid droplets are observed in the cytoplasm. These findings are associated with a high rate of thyroid activity. Towards the end of pregnancy, the large follicles are noticed in the thyroid gland in addition to medium sized follicles. The follicular cells of large follicles contain inconspicuous Golgi apparatus, a few mitochondria and rudimentary rough endoplasmic reticulum, suggesting a low rate of thyroid activity. During lactation, the thyroid gland as in estrus is composed of medium to small sized follicles. The ultrastructural features of thyroid follicular cells indicate that these cells are synthetically very active.

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“…Although post-implantation embryonic development can be slowed by reductions in body temperature in many species of bats (Heideman, in press;Racey, 1982), a postimplantational delay at a particular stage of embryonic development has been demonstrated only in a few species of hats (Bradshaw, 1962;Fleming, 1971;Heideman, 1989a;Heideman et aI., 1993;Rasweiler and Badwaik, 1997) hut may occur in several others (Bernard and Meester, 1982;Krishna andDominic, 1982, 1983;McWilliam, 1987;Wimsatt, 1975). In those species for which histological material is available, there is evidence that embryonic development is nearly or entirely halted for periods of months in or just after gastrulation, shortly after implantation.…”

Section: Discussionmentioning

confidence: 99%

“…Delayed development has been described only in a few species of bats in several families (Bradshaw, 1962;Fleming, 1971;Heideman et aI., 1993;Rasweiler and Badwaik, 1997), including examples in three genera of cynopterine megachiropterans (Heideman, 1988(Heideman, , 1989aHeideman et aI" 1993). In addition, evidence from changes in uterine mass during pregnancy suggests that delayed development may occur in Cynopterus sphinx (Krishna and Dominic, 1983).…”

mentioning

confidence: 99%

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

Heideman

Powell

1998

Journal of Mammalogy

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Ptenochirus jagori (Megachiroptera, Pteropodidae) is a tropical cynopterine fruit bat restricted to the Philippine islands. Samples of bats were obtained over 4 years, and reproductive tracts were preserved and examined using standard histological techniques. Reproductive status also was recorded for bats captured, marked. and released. A facultative post-implantational delay in embryonic development was detected in young P. jagori females reproducing for the first time. The delay occurred at the stage of gastrulation and could last up to 5 months. Adult females showed little evidence of a delay in development. With this delay, young females gave birth only once in their first year and synchronized parturitions with those of adults. Adult females had a gestation period of 4 months and gave birth twice a year, once in late March and early April and once in August. Morphology of early development was similar to that of other cynopterine fruit bats. The evolution and significance of a post-implantational delay in development are discussed.

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Differential Rates of Fetal Growth in Two Successive Pregnancies in the Emballonurid Bat, Taphozous longimanus Hardwicke

Cited by 24 publications

References 9 publications

Effects of elevated temperatures on the embryonic development and corpus luteum activity in the Japanese long-fingered bat, Miniopterus schreibersii fuliginosus

Effects of elevated temperatures on the embryonic development and corpus luteum activity in the Japanese long-fingered bat, Miniopterus schreibersii fuliginosus

Secretory Processes in Follicular Cells of the Thyroid Gland of the Indian Sheath-tailed Bat, Taphozous longimanus (Hardwicke): A Ultrastructural Study

Age-Specific Reproductive Strategies and Delayed Embryonic Development in an Old World Fruit Bat, Ptenochirus jagori

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