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Biol. Bull. 206: 1-3. (February 2004)
© 2004 Marine Biological Laboratory

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

Kendra C. Buresch1, Jean G. Boal2, Gregg T. Nagle3, Jamie Knowles1, Robert Nobuhara1, Kate Sweeney1 and Roger T. Hanlon1,*

1 Marine Resources Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543-1015
2 Department of Biology, Millersville University of Pennsylvania, Millersville, Pennsylvania 17551-0302
3 Marine Biomedical Institute and Department of Anatomy and Neurosciences, University of Texas Medical Branch, Galveston, Texas 77555-1069

* To whom correspondence should be addressed. E-mail: rhanlon{at}mbl.edu

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.




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Biol. Bull., December 1, 2007; 213(3): 274 - 289.
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