Cephalopod Sex and Reproduction

Discussion in 'Physiology and Biology' started by DWhatley, May 30, 2013.

  1. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Mating in the ceph world tends to be an on-going human fascination. Choices, techniques and biologics vary widely from species to species. Observations have included severing and throwing a spermataphore loaded arm at the female (blanked octopus) , mating beak to beak (Larger Pacific Octopus), mate consumption, violent and fast copulation and gender disguise. This is an attempt to collect articles that document the different findings.
     
    Last edited: Jul 22, 2014
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  2. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Octo-SAP - ATTRACTING STORED OCTOPUS SPERM

    ATTRACTING STORED OCTOPUS SPERM
    Journal of Experimental Biology, Nicola Stead

    Sperm-attractant peptide influences the spermatozoa swimming behavior in internal fertilization in Octopus vulgaris
     
  3. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    SQUID
    Idiosepius paradoxus

    Female Pygmy Squid Cryptically Favour Small Males and Fast Copulation as Observed by Removal of SpermatangiaNoriyosi Sato,Takashi Kasugai,Noriyosi Sato,Hiroyuki Munehara 2013 - subscription required

     
    Last edited: Nov 17, 2013
  4. Tintenfisch

    Tintenfisch Architeuthis Staff Member Moderator

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    SQUID
    Here's one of the weirder ones--good old Taningia danae.

    Abstract
    Spermatangium implantation is reported in the large oceanic squid Taningia danae, based on ten mated females from the stomachs of sperm whales. Implanted spermatangia were located in the mantle, head and neck (on both sides) or above the nuchal cartilage, under the neck collar and were often associated with incisions. These cuts ranged from 30 to 65 mm in length and were probably made by males, using the beak or arm hooks. This is the first time wounds facilitating spermatangium storage have been observed in the internal muscle layers (rather than
    external, as observed in some other species of squid). The implications of these observations for the mating behavior of the rarely encountered squid T. danae are discussed.
     

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  5. Tintenfisch

    Tintenfisch Architeuthis Staff Member Moderator

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    SQUID
    Some comments here in the discussion for Onykia ingens.

    Abstract
    Sexual dimorphism in size and morphology of the lower beak of the warty onychoteuthid squid Moroteuthis ingens is analysed. Beaks of maturing males exhibit a band of weak, clear cartilage across the shoulder region, while mature males exhibit a pronounced excavation of this area; the hood remains intact. Female beaks attain greater size, but relatively shorter lower rostral lengths (LRL) than those of males; they display neither the shoulder cartilage nor later erosion, but the hood is consistently eroded in mature specimens. The angle ridge in females is considerably longer than in males. Due to the difference in LRL relative to overall beak size, M. ingens beaks from predator stomachs should be sexed prior to calculating prey size using LRL; for both sexes, the LRL-mantle length (ML) relationship is linear while the LRL-weight relationship is exponential. Sex-specific equations are provided for reconstructing ML and weight using LRL. Based on several incidences of male-female pairs collected with beaks interlocked, M. ingens is postulated to mate in a head-to-head position, with both individuals incurring beak damage during the event.
     

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  6. tonmo

    tonmo Titanites Staff Member Webmaster Moderator

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    Thread promoted to homepage, facebooked and tweeted :thumbsup:
     
  7. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    SQUID
    Doryteuthis opalescens - common market squid

    True colors: Female squid have 2 ways to switch color, according to a UCSB study Sept 2013

     
  8. Tintenfisch

    Tintenfisch Architeuthis Staff Member Moderator

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    Last edited: Nov 21, 2013
  9. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    @Tintenfisch, Can you try again on that link? It looks like you picked up the search criteria but not the URL (note the spaces and missing dot com/org/etc: http://hoving reproduction cephalopod) To edit the link highlight it and click the chain link with the x then click somewhere else then rehighlight and click the link. Don't try to unlink and link without unhighlighting as it confused the editor :roll:
     
  10. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Aquatopia: The Imaginary of the Ocean Deep, Tate St Ives — review
    'Squiggle, squiggle, ooh, good...' Tate St Ives shows how sexy the octopus can be
    Laura Gascoigne 23 November 2013


     
  11. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Characterization of deformed hatchlings of Octopus vulgaris obtained under captivity from a small female
    Pablo Jiménez-Prada, Anastasia Scherbakova, Rodrigo Riera ,Beatriz C. Felipe, António V. Sykes, Rui A. Gonçalves, José P. Andrade, Catalina Perales-Raya, Covadonga Rodríguez,Eduardo Almansa 2013 (subscription)

     
  12. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Evolution of sperm transfer mechanisms in cephalopods: adaptative convergences associated with habitat shifts in the marine environment?

    Principal Investigator:Antonio Carlos Marques, Awardee:Antonio Carlos Marques
    Institution:Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo, SP, Brazil
     
  13. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Reversal and transfer of spermatophores by Octopus vulgaris and O. hummelincki Jerome Wodinsky 2008 (subscription)




    http://www.springerimages.com/Images/LifeSciences/1-10.1007_s00227-008-1010-3-2

    Interesting note on the use of suckers to orient the siphon in the above referenced additional available images page. It does not appear that the enlarged suckers are used in this process.

     
  14. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Octopus
    O. bimaculoides


    Aggressive male mating behavior depends on female maturity in Octopus bimaculoides
    Sobhi Mohanty,Alfredo F. Ojanguren,Lee A. Fuiman 2014 (subscription)

     
  15. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Evaluation of relationship between Chilean octopus (Octopus mimus Gould, 1852) egg health condition and the egg bacterial community
    Shunpei Iehata, Fernando Valenzuela, Carlos Riquelme 2014 (subscription)

     
  16. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Wild Wunderpus photogenicus and Octopus cyanea employ asphyxiating ‘constricting’ in interactions with other octopuses Christine L. Huffard, Mike Bartick (2014) subscription
    Abstract
    Journalist review of the article
    The video is of two males fighting over the rights to a female but the suffocation method discussed is clearly visible.
     
    Last edited: Jul 23, 2014
  17. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Squid Lady Parts
    Danna Staaf (@Danna) 2014

     
  18. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    The octopus that strangled its lover to death BBC © 2014

    BBC Article from an interview with @mucktopus

     
  19. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Sperm transfer or spermatangia removal: postcopulatory behaviour of picking up spermatangium by female Japanese pygmy squid
    Noriyosi Sato, Takashi Kasugai, Hiroyuki Munehara 2014 (subscription)

     
  20. DWhatley

    DWhatley Cthulhu Staff Member Moderator

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    Dimorphic sperm-transfer strategies and alternative mating tactics in loliginid squid
    Yoko Iwata1, Yasunori Sakurai2, Paul Shaw3 2014 (subscription)

     

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