Tuesday, December 30, 2008

Bizarre Sex of Moroteuthis Ingens

Reproduction is no fun if you’re a squid. With one species, the Taningia danae, I discovered that the males give the females cuts of at least 5 centimetres deep in their necks with their beaks or hooks – they don’t have suction pads. They then insert their packets of sperm, also called spermatophores, into the cuts.
With a different species, the Moroteuthis ingens, the spermatophores are introduced in a more peaceful way. ‘With this species the spermatophores penetrate the skin independently. They probably do that with the help of an enzyme-like substance that dissolves tissue.’ Hoving is the first to be able to prove that these sperm packets are able to penetrate the skin under their own steam. He discovered this when he experimentally placed spermatophores on the skin of just-caught individuals. His results are supported by an incident in Japan, where someone had to have an operation after eating squid to remove a spermatophore that lodged in his throat.
(read more...)

1 comment:

  1. פרקטלים נותנים השראה. דרך פרקטל של קבוצת ג'וליה והדמיון שלו בפאטרנים של התמנון המצויין בתמונה הגעתי לחפש את שמו בגוגל.
    Taningia danae
    ואז ראיתי את התחריט היפני ונכנסתי לכאן.
    שחיגר, חיפה.
    מצחיק לראות לאן תגיע אחרי כמה דפים בגוגל.