Change search
ReferencesLink to record
Permanent link

Direct link
Costs and Benefits to Pregnant Male Pipefish Caring for Broods of Different Sizes
Univ Gothenburg, Dept Biol & Environm Sci, Gothenburg, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Univ Gothenburg, Dept Biol & Environm Sci, Gothenburg, Sweden..
2016 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, no 5, e0156484Article in journal (Refereed) PublishedText
Abstract [en]

Trade-offs between brood size and offspring size, offspring survival, parental condition or parental survival are classic assumptions in life history biology. A reduction in brood size may lessen these costs of care, but offspring mortality can also result in an energetic gain, if parents are able to utilize the nutrients from the demised young. Males of the broad-nosed pipefish (Syngnathus typhle) care for the offspring by brooding embryos in a brood pouch. Brooding males can absorb nutrients that emanate from embryos, and there is often a reduction in offspring number over the brooding period. In this study, using two experimentally determined brood sizes (partially and fully filled brood pouches), we found that full broods resulted in larger number of developing offspring, despite significantly higher absolute and relative embryo mortality, compared to partial broods. Male survival was also affected by brood size, with males caring for full broods having poorer survival, an effect that together with the reduced embryo survival was found to negate the benefit of large broods. We found that embryo mortality was lower when the brooding males were in good initial condition, that embryos in broods with low embryo mortality weighed more, and surprisingly, that males in higher initial condition had embryos of lower weight. Brood size, however, did not affect embryo weight. Male final condition, but not initial condition, correlated with higher male survival. Taken together, our results show costs and benefits of caring for large brood sizes, where the numerical benefits come with costs in terms of both embryo survival and survival of the brooding father, effects that are often mediated via male condition.

Place, publisher, year, edition, pages
2016. Vol. 11, no 5, e0156484
National Category
URN: urn:nbn:se:uu:diva-298870DOI: 10.1371/journal.pone.0156484ISI: 000377146100041PubMedID: 27243937OAI: diva2:948308
Helge Ax:son Johnsons stiftelse Knut and Alice Wallenberg FoundationSwedish Research Council
Available from: 2016-07-11 Created: 2016-07-11 Last updated: 2016-07-11Bibliographically approved

Open Access in DiVA

fulltext(481 kB)10 downloads
File information
File name FULLTEXT01.pdfFile size 481 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Ahnesjö, Ingrid
By organisation
Animal ecology
In the same journal

Search outside of DiVA

GoogleGoogle Scholar
Total: 10 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 10 hits
ReferencesLink to record
Permanent link

Direct link