Tremoctopus violaceus Uses Physalia Tentacles as Weapons.

نویسنده

  • E C Jones
چکیده

Immature octopods (Tremoctopus violaceus) have been found with numerous fragments of tentacles of the coelenterate Physalia attached to the suckers of their dorsal arms. The probable method of acquisition, the evidence of adaptation for holding the tentacles, and the possibility that the octopod uses these coelenterate tentacles as offensive and defensive weapons are discussed.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Aquatic antagonists: indirect nematocyst envenomation and acute allergic contact dermatitis due to nudibranchs.

It is well-known to swimmers, divers, and beachgoers that coelenterates such as the Portuguese man-of-war (Physalia physalis), true jellyfish such as the box jellyfish, sea anemone, true coral, and fire coral can inflict painful and sometimes fatal stings. As a result, these organisms are avoided by humans and most sea creatures; however, indirect contact with the skin may occur. For example, c...

متن کامل

First encounter with a live male blanket octopus: the world’s most sexually size-dimorphic large animal

The first encounter with a live male blanket octopus, Tremoctopus violaceus Chiaie, 1830, illustrates the most extreme example of sexual size-dimorphism in a non-microscopic animal. Females attain sizes of up to 2 m long—almost 2 orders of magnitude larger than the 2.4-cm-long male. Weight ratios between the sexes are at least 10 000:1 and are likely to reach 40 000:1. Sexual selection and the ...

متن کامل

Hydrodynamics of sailing of the Portuguese man-of-war Physalia physalis.

Physalia physalis, commonly known as the Portuguese man-of-war (PMW), is a peculiar looking colony of specialized polyps. The most conspicuous members of this colony are the gas-filled sail-like float and the long tentacles, budding asymmetrically beneath the float. This study addresses the sailing of the PMW, and, in particular, the hydrodynamics of its trailing tentacles, the interaction betw...

متن کامل

Assessing the Efficacy of First-Aid Measures in Physalia sp. Envenomation, Using Solution- and Blood Agarose-Based Models

Stings from the hydrozoan species in the genus Physalia cause intense, immediate skin pain and elicit serious systemic effects. There has been much scientific debate about the most appropriate first aid for these stings, particularly with regard to whether vinegar use is appropriate (most current recommendations recommend against vinegar). We found that only a small percentage (≤1.0%) of tentac...

متن کامل

Trench warfare on the shore: interclonal aggression in sea anemones.

mpirical research in behavioral ecolE ogy is dominated by studies of verte brates and insects. The journal Animal Behavior, for example, during the last half of 1995 (Vol. SO), had a total of 48 papers onmammals, 43 on birds, eight on amphib ians and reptiles, 17 on fishes, 33 on terrestrial invertebrates (primarily insects), and five on aquatic invertebrates (only two of which were marine). Th...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Science

دوره 139 3556  شماره 

صفحات  -

تاریخ انتشار 1963