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On the Sterols of Some Ascidians
Archives Internationales de Physiologie et de Biochimie, 1975The lipid content of sea squirts is low, namely less than a half percent of the fresh weight. Lipids consist of about seventy percent of saponifiable lipids and of about twenty percent of non-saponifiable lipids. Both types of these lipids, including sterols, can be synthesized from acetate by these animals.
P A, Voogt, J W, van Rheenen
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Development Genes and Evolution, 2002
The engrailed genes play roles in the maintenance of segment polarity in a variety of animals and in the establishment and maintenance of the mid-brain/hind-brain boundary (MHB) in vertebrates. We isolated an ascidian engrailed gene and analyzed its expression pattern during early development. Expression begins at the neurula stage and is restricted to
Di, Jiang, William C, Smith
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The engrailed genes play roles in the maintenance of segment polarity in a variety of animals and in the establishment and maintenance of the mid-brain/hind-brain boundary (MHB) in vertebrates. We isolated an ascidian engrailed gene and analyzed its expression pattern during early development. Expression begins at the neurula stage and is restricted to
Di, Jiang, William C, Smith
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2018
Ascidians are tunicates, which constitute the sister group of vertebrates. The ascidian genome contains two Zic genes, called Zic-r.a (also called Macho-1) and Zic-r.b (ZicL). The latter is a multi-copy gene, and the precise copy number has not yet been determined.
Yutaka, Satou, Kaoru S, Imai
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Ascidians are tunicates, which constitute the sister group of vertebrates. The ascidian genome contains two Zic genes, called Zic-r.a (also called Macho-1) and Zic-r.b (ZicL). The latter is a multi-copy gene, and the precise copy number has not yet been determined.
Yutaka, Satou, Kaoru S, Imai
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Interspecific Fertilization in Ascidians
Nature, 1948THE only experimental work on interspecific fertilization in Ascidians known to me is that of Reverberi1, who succeeded in fertilizing Ciona intestinalis eggs with Phallusia mamillata sperms after removal of the egg membranes. He availed himself of Morgan‘s observation that in Ciona only the egg membranes oppose self-fertilization.
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1957
The large literature on ascidians contains comparatively little on the ecology of these animals. What is available is for the most part widely scattered in: Systematic monographs containing comments on geographical distribution, vertical distribution, and temperature and bottom conditions at collecting stations.
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The large literature on ascidians contains comparatively little on the ecology of these animals. What is available is for the most part widely scattered in: Systematic monographs containing comments on geographical distribution, vertical distribution, and temperature and bottom conditions at collecting stations.
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2016
Ascidians/tunicates are one of the dominant members in the benthic macrofauna and contribute more significantly to raise the biodiversity of marine ecosystem by extending their distribution on a variety of natural as well as the artificial substratum across the world.
H. Abdul Jaffar Ali, M. Tamilselvi
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Ascidians/tunicates are one of the dominant members in the benthic macrofauna and contribute more significantly to raise the biodiversity of marine ecosystem by extending their distribution on a variety of natural as well as the artificial substratum across the world.
H. Abdul Jaffar Ali, M. Tamilselvi
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1990
About 80 years ago Henze (1911) found unexpectedly that ascidian blood cells contained a high level of vanadium. The initial interest in this phenomenon was not only the presence of vanadium but also the possibility that other metals might be concentrated in ascidians and other organisms.
Hitoshi Michibata, Hiromu Sakurai
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About 80 years ago Henze (1911) found unexpectedly that ascidian blood cells contained a high level of vanadium. The initial interest in this phenomenon was not only the presence of vanadium but also the possibility that other metals might be concentrated in ascidians and other organisms.
Hitoshi Michibata, Hiromu Sakurai
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2016
The mysterious morphological structure of ascidians was taken into account for classification by various researchers. Herdman (1882) has given a classification of tunicate based upon the external features in relation to gemmation and formation of colonies.
H. Abdul Jaffar Ali, M. Tamilselvi
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The mysterious morphological structure of ascidians was taken into account for classification by various researchers. Herdman (1882) has given a classification of tunicate based upon the external features in relation to gemmation and formation of colonies.
H. Abdul Jaffar Ali, M. Tamilselvi
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1975
Although there is no resemblance in form between adult echinoderms and ascidians, we have chosen to link them together in this chapter for three reasons. First it is necessary to emphasize that they both belong to the Deuterostomia. This is a classification of animals which links the echinoderms with the chordates, and is based on the fact that during ...
F. S. Billett, A. E. Wild
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Although there is no resemblance in form between adult echinoderms and ascidians, we have chosen to link them together in this chapter for three reasons. First it is necessary to emphasize that they both belong to the Deuterostomia. This is a classification of animals which links the echinoderms with the chordates, and is based on the fact that during ...
F. S. Billett, A. E. Wild
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Palatability of ascidians: a meta-analysis of the predation effect on ascidians
Marine Ecology Progress SeriesAscidians are marine sessile animals that have evolved many strategies to reduce predation. Previous manipulative experiments with ascidian tissues or pellets have shown that they have chemical defenses that render them unpalatable. However, predation-exclusion experiments on a community scale have shown that ascidians are almost entirely eaten when ...
JH Garcia da Silva, LC Leal, GM Dias
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