منابع مشابه
Brooding in a Bathypelagic Octopus
A mature female and 12 larvae of the octopus Bolitaena microcotyla were captured at bathypelagic depths off Hawaii. The female appears to have been brooding the larvae in a large chamber formed by the oral arms and web. This finding supports the likelihood that the brooding habit is universal in pelagic incirrate octopods. usual position. They arch forward and converge near their tips. All of t...
متن کاملOctopus: A Multi Agent Chatbot
A Chatbot is a type of conversational agent or a computer program which has been designed to simulate an intelligent conversation with one or more human users via auditory or textual methods. Chatbots can be used as an exciting intelligent mechanism to interacting with computers. Undisputedly, Chatbots revolutionize the next generation of human-machine and machine-machine interaction in the con...
متن کاملFirst 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 کاملVisual Acuity in Octopus Pallidus and Octopus Australis
Specimens of Octopus pallidus and 0. australis were trained to discriminate vertical from horizontal rectangles, vertical from horizontal gratings, and vertical and horizontal gratings from uniform grey. In the discriminations that involved gratings a conditional simultaneous discrimination procedure was used, in which the two stimuli to be discriminated were presented stationary at the two end...
متن کاملEarly temperamental traits in an octopus (Octopus bimaculoides).
During their 3rd week of life, 73 Octopus bimaculoides were observed to test whether discrete behaviors could be grouped reliably to reflect dimensions of temperament. Frequencies of behaviors during Week 3 were subjected to principal-components analysis (PCA), resulting in 4 components (active engagement, arousal/readiness, aggression, and avoidance/disinterest) that explain 53% of the varianc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific American
سال: 1899
ISSN: 0036-8733
DOI: 10.1038/scientificamerican09161899-180a