Sokoine University of Agriculture

The pattern of reproduction in the mole-rat Heliophobius from Tanzania: do not refrain during the long rains!

Show simple item record Ngalameno, M. K. Bastos, A. D. S. Mgode, G. Bennett, N. C. 2020-06-05T08:29:40Z 2020-06-05T08:29:40Z 2016
dc.description Article of Can. J. Zool. 95: 107–114 (2017) en_US
dc.description.abstract The genus Heliophobius Peters, 1846 comprises at least six cryptic, topotypical species in the Heliophobius argenteocinereus Peters, 1846 species complex. The current study investigated the breeding patterns of a wild-caught population from Tanzania where the putative species Heliophobius argenteocinereus emini Noack, 1894 resides. Individuals were collected on a monthly basis for an entire calendar year. Assessment of fœtus presence, gonadal histology, reproductive-tract morphometrics in combination with gonadal steroid (plasma progesterone and œstradiol-17␤ in females and testosterone in males) measurements and field observations revealed that rainfall is important for the onset of breeding. The results further confirmed that breeding is limited to a single, yearly reproductive event synchronised to the long rainfall pattern. The distinct breeding peak in July is associated with an elevation in gonadal mass, increase in concentrations of reproductive hormones, and presence of Graafian follicles and corpora lutea in the ovaries of females. These reproductive parameters coincided with the end of the long rainfall period, whereas presence of young in the maternal burrow system corresponded with the start of the short rainfall of East Africa. These findings confirm Heliophobius has a single breeding opportunity each year, and this species is therefore vulnerable to any changes that may impact their climatically attuned breeding patterns. en_US
dc.language.iso en en_US
dc.publisher NRC Research Press en_US
dc.subject Heliophobius en_US
dc.subject Solitary en_US
dc.subject Hormones en_US
dc.subject Histology en_US
dc.subject Precipitation en_US
dc.subject Radioimmunoassay en_US
dc.subject Reproduction en_US
dc.title The pattern of reproduction in the mole-rat Heliophobius from Tanzania: do not refrain during the long rains! en_US
dc.type Article en_US
dc.url › doi › abs › cjz-2016-0153 en_US

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