NDLI: Female Pygmy Squid Cryptically Favour Small Males and Fast Copulation as Observed by Removal of Spermatangia

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Female Pygmy Squid Cryptically Favour Small Males and Fast Copulation as Observed by Removal of Spermatangia

Content Provider	Semantic Scholar
Author	Sato, Noriyosi Kasugai, Takashi Munehara, Hiroyuki
Copyright Year	2013
Abstract	Females can express mate (or fertilisation) preferences after copulation. In the Japanese pygmy squid, Idiosepius paradoxus, in which males do not show any conspicuous pre-copulatory displays, the females remove the spermatangia attached to their bodies after copulation. In this study, we observed pre- and post-copulatory behaviours and analysed which variables associated with copulation were correlated with spermatangia removal. When females mated with larger males or copulation lasted longer female squid elongated their buccal mass after copulation and removed more spermatangia. We also investigated the effects of spermatangia removal on the retained spermatangia to predict whether cryptic female choice (CFC) influenced fertilisation success. Spermatangia removal by females had a stronger effect on the number of spermatangia retained than did the number of spermatangia ejaculated by males. These results suggest that spermatangia removal after copulation by buccal mass elongation works as a CFC in Japanese pygmy squid, and females cryptically favoured small males and fast copulation.
Starting Page	221
Ending Page	228
Page Count	8
File Format	PDF HTM / HTML
DOI	10.1007/s11692-013-9261-4
Volume Number	41
Alternate Webpage(s)	http://naosite.lb.nagasaki-u.ac.jp/dspace/bitstream/10069/34511/1/EvoBio41_221.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s11692-013-9261-4
Journal	Evolutionary Biology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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