Autoren:	Koch, Lisa K. Meunier, Joël
Titel:	Mother and offspring fitness in an insect with maternal care : phenotypic trade-offs between egg number, egg mass and egg care
Online-Publikationsdatum:	5-Okt-2022
Erscheinungsdatum:	2014
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	BACKGROUND: Oviparous females have three main options to increase their reproductive success: investing into egg number, egg mass and/or egg care. Although allocating resources to either of these three components is known to shape offspring number and size, potential trade-offs among them may have key impacts on maternal and offspring fitness. Here, we tested the occurrence of phenotypic trade-offs between egg number, egg mass and maternal expenditure on egg care in the European earwig, Forficula auricularia, an insect with pre- and post-hatching forms of maternal care. In particular, we used a series of laboratory observations and experiments to investigate whether these three components non-additively influenced offspring weight and number at hatching, and whether they were associated with potential costs to females in terms of future reproduction. RESULTS: We found negative associations between egg number and mass as well as between egg number and maternal expenditure on egg care. However, these trade-offs could only be detected after statistically correcting for female weight at egg laying. Hatchling number was not determined by single or additive effects among the three life-history traits, but instead by pairwise interactions among them. In particular, offspring number was positively associated with the number of eggs only in clutches receiving high maternal care or consisting of heavy eggs, and negatively associated with mean egg mass in clutches receiving low care. In contrast, offspring weight was positively associated with egg mass only. Finally, maternal expenditure on egg care reduced their future reproduction, but this effect was only detected when mothers were experimentally isolated from their offspring at egg hatching. CONCLUSIONS: Overall, our study reveals simultaneous trade-offs between the number, mass and care of eggs. It also demonstrates that these factors interact in their impact on offspring production, and that maternal expenditure on egg care possibly shapes female future reproduction. These findings emphasize that studying reproductive success requires consideration of phenotypic trade-offs between egg-number, egg mass and egg care in oviparous species.
DDC-Sachgruppe:	590 Tiere (Zoologie) 590 Zoological sciences
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 10 Biologie
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7842
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by/4.0/
Zeitschrift:	BMC evolutionary biology 14
Seitenzahl oder Artikelnummer:	Art. 125
Verlag:	BioMed central
Verlagsort:	London
Erscheinungsdatum:	2014
ISSN:	1471-2148
URL der Originalveröffentlichung:	http://dx.doi.org/10.1186/1471-2148-14-125
DOI der Originalveröffentlichung:	10.1186/1471-2148-14-125
Enthalten in den Sammlungen:	DFG-OA-Publizieren (2012 - 2017)