نتایج جستجو برای: ctenophora
تعداد نتایج: 318 فیلتر نتایج به سال:
Ctenophores are also characterized by a pair of tentacles that they spread out like a web to catch zooplankton prey, such as small crustaceans and even small fish. There is even one group of ctenophores, the Beroids, which feeds on other ctenophores, and there are also a few groups that are benthic (they absorb their comb plates following embryonic development and creep along on the ocean floor...
Ecosystem surveys are carried out annually in the Barents Sea by Russia and Norway to monitor the spatial distribution of ecosystem components and to study population dynamics. One component of the survey is mapping the upper pelagic zone using a trawl towed at several depths. However, the current technique with a single codend does not provide fine-scale spatial data needed to directly study s...
An understanding of ctenophore biology is critical for reconstructing events that occurred early in animal evolution. Toward this goal, we have sequenced, assembled, and annotated the genome of the ctenophore Mnemiopsis leidyi. Our phylogenomic analyses of both amino acid positions and gene content suggest that ctenophores rather than sponges are the sister lineage to all other animals. Mnemiop...
The Bay of Villefranche is a unique site. Protected by high hills, its relatively deep waters (in the outer parts 60-100 m) open out directly onto the mesopelagic depths of the N. W. Mediterranean Sea. These characteristics explain in large part the fact that it harbors a particularly rich marine life, especially with regard to planktonic forms. The early naturalists, François Péron and Claude ...
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