Experimental Evidence That Ovary and Oviducal Gland Extracts Influence Male Agonistic Behavior in Squids

Kendra C. Buresch, Jean G. Boal, Gregg T. Nagle, Jamie Knowles, Robert Nobuhara, Kate Sweeney, Roger T. Hanlon

Research output: Contribution to journalArticle

20 Scopus citations


Recent investigations of sensory and behavioral cues that initiate sexual selection processes in the squid Loligo pealeii have determined that egg capsules deposited on the substrate provide a strong visual and chemotactile stimulus to males, even in the absence of females (1, 2, 3). The visual stimulus of egg capsules attracts males to the eggs, and when the males touch the eggs, they encounter a chemical stimulus that leads to highly aggressive fighting behavior. We have recently demonstrated that egg capsule extracts implanted in artificial egg capsules elicit this aggressive behavior (4). In this communication, we present evidence that the salient chemical factor originates in the ovary and perhaps the oviducal gland of the female reproductive tract.

Original languageEnglish (US)
Pages (from-to)1-3
Number of pages3
JournalBiological Bulletin
Issue number1
Publication statusPublished - Feb 2004
Externally publishedYes


ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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