| Titre : |
Coral reef ascidians of new caledonia |
| Type de document : |
texte imprimé |
| Auteurs : |
Pierre Laboute, Auteur |
| Editeur : |
Orstorm éditions |
| Année de publication : |
1991 |
| Importance : |
247 p. |
| Format : |
28 cm. |
| ISBN/ISSN/EAN : |
978-2-7099-1050-7 |
| Langues : |
Anglais (eng) |
| Index. décimale : |
593 Invertébrés marins et des bords de mer |
| Résumé : |
The natural world, although often unfamiliar, is waiting for us to acquaint ourselves with it and to understand it through close, patient observations. While we expect to encounter the unknown when we venture on hikes and dives, we often come upon it in disconcertingly intimate ways. For example, we generally know what we eat. But sea-foods have a way of surprising us and even leave us puzzled after our meal has been "identified". You may on occasion have eaten a "Violet", an "oya", or a "piure", but did you realize you were eating ascidians, a so-called sea squirt? On scuba or snorkeling trips you surely have seen ascidians, probably without knowing it and perhaps without realizing that you were looking at an animal at all. In fact, ascidians are our closest relatives among the invertebrates. Even so, except for a few specialists, naturalists rarely have more than a passing acquaintance with these inconspicuous creatures. Ascidians lack the external skeletons or shells that draw our attention^ to animals like molluscs, crustaceans, and echinoderms. Nor do they move about. Instead, ascidians usually form small, soft, immobile masses, often quite drab in color, that resemble sponges or even stones. But what a remarkable variety of shapes, patterns, and colors they reveal to the practiced eye!
Ascidians have been recognized as a coherent group only since the end of the 19th century. Aristotle mentioned ascidians but did not try to classify them among other animals. Names like stony or soft corals, zoophytes, molluscs without shells, or molluscoids all suggest how difficult it has been for zoologists since antiquity to interpret the structures of these strange creatures, in the late 19th century, however, when embryology was transforming the ideas of systematizes, the Russian biologist Kowalevsky found similarities between ascidians larvae and frog tadpoles. With this discovery, he theorized a link. |
Coral reef ascidians of new caledonia [texte imprimé] / Pierre Laboute, Auteur . - Orstorm éditions, 1991 . - 247 p. ; 28 cm. ISBN : 978-2-7099-1050-7 Langues : Anglais ( eng)
| Index. décimale : |
593 Invertébrés marins et des bords de mer |
| Résumé : |
The natural world, although often unfamiliar, is waiting for us to acquaint ourselves with it and to understand it through close, patient observations. While we expect to encounter the unknown when we venture on hikes and dives, we often come upon it in disconcertingly intimate ways. For example, we generally know what we eat. But sea-foods have a way of surprising us and even leave us puzzled after our meal has been "identified". You may on occasion have eaten a "Violet", an "oya", or a "piure", but did you realize you were eating ascidians, a so-called sea squirt? On scuba or snorkeling trips you surely have seen ascidians, probably without knowing it and perhaps without realizing that you were looking at an animal at all. In fact, ascidians are our closest relatives among the invertebrates. Even so, except for a few specialists, naturalists rarely have more than a passing acquaintance with these inconspicuous creatures. Ascidians lack the external skeletons or shells that draw our attention^ to animals like molluscs, crustaceans, and echinoderms. Nor do they move about. Instead, ascidians usually form small, soft, immobile masses, often quite drab in color, that resemble sponges or even stones. But what a remarkable variety of shapes, patterns, and colors they reveal to the practiced eye!
Ascidians have been recognized as a coherent group only since the end of the 19th century. Aristotle mentioned ascidians but did not try to classify them among other animals. Names like stony or soft corals, zoophytes, molluscs without shells, or molluscoids all suggest how difficult it has been for zoologists since antiquity to interpret the structures of these strange creatures, in the late 19th century, however, when embryology was transforming the ideas of systematizes, the Russian biologist Kowalevsky found similarities between ascidians larvae and frog tadpoles. With this discovery, he theorized a link. |
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