Monster colossal squid is slow not fearsome predator - BBC News

Discussion in 'The Octopus' Den' started by octobot, May 7, 2010.

  1. octobot

    octobot Robotic Staff Staff Member Robotic Staff

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  2. OB

    OB Colossal Squid Staff Member Moderator

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    Flawed research, apparently not taking growth rate into account.
     
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  3. Toren

    Toren Vampyroteuthis Supporter

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    I too was curious about a "second opinion"
     
  4. myopsida

    myopsida Vampyroteuthis Supporter

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    "The team also suggest that the colossal squid's huge eyes do not help it hunt, but instead help it detect and avoid predators of its own in the deep dark waters where it lives."

    Why then are the eyes directed forward, giving overlap of the visual fields and 3-D perception - characteristic of a predator species rather than animals with lateral eyes more common in species that need to have all-round vision to detect predators
     
  5. OB

    OB Colossal Squid Staff Member Moderator

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    Hear, hear, Chris, let's also conveniently forget about that massive Taningia like fin, giving EVERY indication of agility...
     
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  6. GPO87

    GPO87 Sepia elegans Staff Member Moderator

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    I'd like to know who this Dr. Rosa is. What do they specialize in? Are they a part of this website?
     
  7. chrono_war01

    chrono_war01 Colossal Squid Supporter

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    If they are, then I think an invite should be sent to ask them to clarify how they came to those conclusions, if not, then perhaps they should be invited over to join us :)
     
  8. monty

    monty Colossal Squid Staff Member Supporter

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    Yeah, it's also not clear to me that an ambush predator wouldn't make full use of eyesight for hunting.
     
  9. Jean

    Jean Colossal Squid Supporter

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    I believe Steve O has suggested a more ambush type existence for these in the past, at least that's what he implied on facebook!
     
  10. Kuka Lula

    Kuka Lula Larval Mass Registered

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    I believe in their findings... We have almost NO information on this species, but the estimates point to an ambush predator...

    In the animal world there are still many features that haven't gone away over time, and their fins could be one of those features... This animal may have evolved from a much more agile and motile predator that fully used their eyesight and that lived in shalower waters not that long ago... It may have found in Antarctica the only place that they could live all of their lives and still hasn't fully adapted to life in the deep-sea...
    But at those depths and at that temperature it's almost impossible that this animal could be and active predator and capable of high speed swims...

    About the eyes... Mystery... More stuff to study =)
     
  11. Clem

    Clem Architeuthis Supporter Registered

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    There's an element of eitherorism to this research that isn't all that helpful. There's no reason M. hamiltoni can't be an active hunter and an ambush predator. Take my old pal C. carcharias as an example. Immature great whites are fast chasers: their diet is primarily fish, and speedy fish at that. Mature whites are fat, stealthy hunters, sneaking up on unwary pinnipeds. Mature and immature whites are also opportunistic scavengers; throw a dead whale their way and they'll take at least one bite. So, there's a single species that in differing contexts and stages of development engages in three very different feeding strategies. Apples and oranges, teuthids and elasmobranchs, but you get my point.

    As for the eyes, what good are Meso's predator-detecting capabilities if they don't translate into predator-avoidance? Sure, the fat, drifitng, lazy blob could see the whale pod coming, but then what? Drift more urgently? If the preponderance of Meso beaks in whale stomachs is any indication, Meso's keen eyesight doesn't confer much of an advantage.

    Per OB's comment about growth rates, I just don't see how rapid growth to enormous size could be supported by passive feeding, unless the squids have come to an arrangement with lactating sperm whales: "Let us elbow in next to the calves now, and you guys can eat us in two years. Deal?"

    Clem
     
  12. skywindsurfer

    skywindsurfer Architeuthis Registered

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  13. OB

    OB Colossal Squid Staff Member Moderator

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    Classic Clem :smile:
     
  14. tonmo

    tonmo Titanites Staff Member Webmaster Moderator

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    ...still need a Like button at the post level...
     

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