Journal article
Last male sperm precedence in a polygamous squid
ZE Squires, BBM Wong, MD Norman, D Stuart-Fox
Biological Journal of the Linnean Society | Published : 2015
DOI: 10.1111/bij.12590
Abstract
Differential sperm usage from consecutive matings, or sperm precedence, is vital in determining male reproductive success and the outcome of sperm competition for many organisms. Sperm precedence also has significant consequences for mating system dynamics, including both male and female adaptations for increasing reproductive success and avoiding the costs of mating. Despite sexual selection being a strong driver of reproductive behaviour and morphology in cephalopods, surprisingly few studies have investigated sperm dynamics in this group. To redress this gap, we experimentally quantified sperm precedence patterns in the dumpling squid, Euprymna tasmanica, controlling for recent male matin..
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Funding Acknowledgements
We thank Amanda Franklin, Rod Watson, and Ben Wegener for help with collections and Gordon Gully and Ana Alcaro for help with animal husbandry. We thank Jo Sumner, Adnan Moussalli, Mike Gardner, Raoul Mulder, and Sandy Clarke for help with genetic analysis. We also thank two anonymous reviewers for their helpful comments. This research was supported by funds from the Hermon Slade Foundation, Holsworth Wildlife Endowment, Museum Victoria, and the Victorian Marine Science Consortium.