THE IMPRESSIVE COMPLEXITY IN THE NAUTILUS POMPILIUS SHELL
نویسندگان
چکیده
منابع مشابه
The impressive complexity in the Nautilus pompilius shell
The complexity of the Nautilus pompilius shell is analyzed in terms of its fractal dimension and its equiangular spiral form. Our findings assert that the shell is fractal from its birth and that its growth is dictated by a self-similar criterion (we obtain the fractal dimension of the shell as a function of time). The variables that have been used for the analysis show an exponential dependenc...
متن کاملOn the Visual System of Nautilus Pompilius
The anatomy of the eye of Nautilus pompilius Linnaeus was studied, using light and electron microscopy. The outer and inner surfaces of the iris were found to be lined with columnar epithelium bearing microvilli, except for the groove running ventrally from the pupil over the outer surface of the iris, where the epithelial cells bear cilia. Many mucus cells are also present. The epithelium of t...
متن کاملThree-dimensional odor tracking by Nautilus pompilius.
The 'living fossil' Nautilus pompilius is thought to use olfaction as its primary sensory system during foraging, yet neither the organs responsible for olfaction nor the mechanisms or behaviors associated with odor tracking have been subjected to experimentation. Flume testing under dark conditions revealed that Nautilus could consistently detect and follow turbulent odor plumes to the source ...
متن کاملA revisited phylogeography of Nautilus pompilius
The cephalopod genus Nautilus is considered a "living fossil" with a contested number of extant and extinct species, and a benthic lifestyle that limits movement of animals between isolated seamounts and landmasses in the Indo-Pacific. Nautiluses are fished for their shells, most heavily in the Philippines, and these fisheries have little monitoring or regulation. Here, we evaluate the hypothes...
متن کاملA biphasic memory curve in the chambered nautilus, Nautilus pompilius L. (Cephalopoda: Nautiloidea).
Cephalopods are an exceptional taxon for examining the competing influences of ecology and evolutionary history on brain and behaviour. Coleoid cephalopods (octopuses, cuttlefishes and squids) have evolved specialised brains containing dedicated learning and memory centres, and rely on plastic behaviours to hunt prey effectively and communicate intricate visual displays. Their closest living re...
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ژورنال
عنوان ژورنال: Fractals
سال: 2003
ISSN: 0218-348X,1793-6543
DOI: 10.1142/s0218348x03001653