New! Sign up for our free email newsletter.
Science News
from research organizations

Moongoose females compete over reproduction

Date:
December 13, 2019
Source:
University of Helsinki
Summary:
A new study on wild banded mongooses reveals that females may use spontaneous abortion to cope with reproductive competition, and to save their energy for future breeding attempts in better conditions.
Share:
FULL STORY

A new study on wild banded mongooses reveals that females may use spontaneous abortion to cope with reproductive competition, and to save their energy for future breeding attempts in better conditions.

Researchers at the University of Exeter, UK, followed a population of wild banded mongooses (Mungos mungo) in western Uganda for 15 years, using ultrasound imaging to track which females became pregnant and which carried to full term. They discovered that there were more abortions during the dry season when food was scarce, and also when more females were competing over reproduction in the same group. Individual females were less likely to carry to term if they were young, in poor condition, or carrying smaller fetuses.

"Reproduction takes a lot of energy, and for a female whose offspring may have slim chances at survival, it makes sense to delay that investment until times are better. Spontaneous abortion may be an adaptive strategy in this species because it enables females to save energy for the next breeding attempt," says researcher, and senior author of the study, Emma Vitikainen from the University of Helsinki.

Banded mongooses are cooperative breeders that live in family groups where several females give birth at the same time to a litter that is jointly cared for by all the group members. Underneath this seemingly harmonious surface, co-breeding females compete over whose offspring do best. Pups that are born bigger have more help from their group members, grow faster and outcompete their littermates.

This study revealed that females adjust their own investment in response to the competition, and that females whose offspring would be more likely to lose out are more likely to cut their losses by aborting their fetuses mid-pregnancy. Banded mongooses also curb competition by evicting younger females. To focus on spontaneous pregnancy loss the researchers only looked at breeding events where no violent eviction events occurred.

"Female competition over reproduction is easily overlooked," explains lead author Emma Inzani from the University of Exeter, UK. "Males fight with horns and antlers over access to females, whereas female competition can be much more subtle. Our study shows that even in the absence of overt aggression, females adjust their reproductive decisions in response to competition from other females. "

All research was done under ethical permits from University of Exeter and Uganda Wildlife Authority and study methods caused no harm to pregnant mongooses.


Story Source:

Materials provided by University of Helsinki. Note: Content may be edited for style and length.


Journal Reference:

  1. E. Inzani, H. H. Marshall, F. J. Thompson, G. Kalema-Zikusoka, M. A. Cant, E. I. K. Vitikainen. Spontaneous abortion as a response to reproductive conflict in the banded mongoose. Biology Letters, 2019; 15 (12): 20190529 DOI: 10.1098/rsbl.2019.0529

Cite This Page:

University of Helsinki. "Moongoose females compete over reproduction." ScienceDaily. ScienceDaily, 13 December 2019. <www.sciencedaily.com/releases/2019/12/191213115420.htm>.
University of Helsinki. (2019, December 13). Moongoose females compete over reproduction. ScienceDaily. Retrieved June 20, 2024 from www.sciencedaily.com/releases/2019/12/191213115420.htm
University of Helsinki. "Moongoose females compete over reproduction." ScienceDaily. www.sciencedaily.com/releases/2019/12/191213115420.htm (accessed June 20, 2024).

Explore More

from ScienceDaily

RELATED STORIES