By Richard Arnold Davis (auth.), W. Bruce Saunders, Neil H. Landman (eds.)
This quantity is a reprint of a vintage ebook approximately Nautilus, first released in 1987, with an introductory bankruptcy summarizing all the paintings on Nautilus and its habitat because the e-book of the 1st variation greater than two decades in the past. The surge in articles within the final twenty years exhibits an accelerated curiosity within the topic, reflecting a renewed appreciation of the complexity and fragility of the marine habitat and its biota. The 37 chapters are written via forty eight specialists within the box and canopy all elements of this residing fossil from its ecology to its embryology. This quantity additionally positive factors new pictures, together with a powerful photo of the 1st hatched Nautilus in captivity. Nautilus is an iconic animal within the marine realm and represents a part of the various fauna of the Indo-Pacific. it's also a member of a lineage of shelled cephalopods courting again greater than four hundred million years. consequently, this quantity can be proper to the fields of marine technology, evolutionary biology, and paleontology.
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Pompilius, N. stenomphalus, and possible hybrids that share intermediate features of the two species from 250-440 m depth off Lizard Island, Great Barrier Reef. This is the second known occurrence of sympatric species of Nautilus, the first locale for living N. stenomphalus, and is the first known example of possible hybridization between two species of Nautilus. [117] Saunders et al. (1989) reported trapping N. pompilius at 270-310 m depth in American Samoa; negative trapping results in Western Samoa are inconclusive.
135] Uchiyama and Tanabe (1999) reported hatching of N. macromphalus in the Toba Aquarium in Japan between 1992 and 1996. 2˚C and the embryonic period ranged between 269 and 362 days. This was shorter than that for N. belauensis maintained at lower temperatures in the Waikiki Aquarium, Hawaii. [56] Isaji et al. (2002) described the ultrastructure of the muscular attachment of the shell in embryos and adults of N. pompilius. The inner surface of the shell at the site of muscular attachment is covered with a relatively thin semi-transparent membrane.
Pompilius hemocyanin. They found that the seven functional units of the Nautilus hemocyanin directly correspond to those found in Octopus, as does the overall gene structure. They used these data to establish a molecular clock and estimated the divergence of Nautilus and Octopus at 415 ± 24 Ma. [22] Boore (2006) reported the complete sequence of the mitochondrial genome of N. macromphalus. There is an unusually high number of non-coding regions, whose functions, if any, are unknown. They may contain regulatory signals for transcription and/or replication.