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Topic: Appendicularia


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In the News (Thu 21 Mar 19)

  
  MOLECULAR PHYLOGENY   (Site not responding. Last check: 2007-10-03)
In particular, is the appearance of a syncitial state the cause of this resistance, or on the contrary, do the embryonic mononucleate muscle cells have acquired the resistance to apoptosis, the fusion of myoblasts being a consequence of this new property ?
Appendicularia always bear a tail whereas Thaliacea and Ascidiacea express a transient embryonic tail.
The phylogenetic position of Appendicularia (the only known "Perennichordates") will be studied among a wide variety of Urochordate taxa, and for several genetically independent nuclear markers:
www.isem.univ-montp2.fr /PPP/PM/RES/Tools/@Apoptosis.php   (456 words)

  
 ISAC XX Abstracts   (Site not responding. Last check: 2007-10-03)
The content of houses, animal and faecal pellets of the filter feeding O┬┤kopleura dioica (Tunicata appendicularia) were analysed by Flow cytometry.
In laboratory experiments with monoalgal populations Prochlorococcus, Synechococcus and the picoeucaryote Isochrisis galbana were retained by houses, transited through the digestive tract and were aggregated in faecal pellets.
The Prochlorococcus and the picoeukaryotes are efficiently digested whereas Synechococcus transit through the gut without any apparent degradation and are aggregated in the faecal pellets..
www.wiley.com /legacy/products/subject/life/cytometry/isac2000/6831.htm   (252 words)

  
 American Society of Limnology and Oceanography   (Site not responding. Last check: 2007-10-03)
This planktonic family is second in abundance only to copepods and constitutes an understudied group, probably mostly due to their extreme fragility.
The appendicularia are widespread and highly efficient filter feeders with an extreme growth potential, short generation time and high fecundity.
Through their unique external filter houses the Appendicularia graze efficiently on suspended particles down to 0,2um in diameter and probably as well on the high molecular weight fraction of dissolved organic carbon.
aslo.org /meetings/albuquerque2001/389.html   (199 words)

  
 Results   (Site not responding. Last check: 2007-10-03)
Tunicata (=sub phylum urochordata) consists 4 classes and around 2500 species, all marine: class ascidiacea (benthic, solitary or colonial sessile tunicates); class thaliacea (solitary or colonial, pelagic planktonic tunicates; 3 classes: pyrosomida, salpida and doliolida); class appendicularia (=larvacea, solitary, planktonic tunicates) and class sorberacea (benthic, abyssal tunicates).
Our interest is in the thaliacea and appendicularia, both of which are planktonic, often referred to as gelatinous zooplankton as a consequence of their watery body tissue.
All are marine suspension feeders, utilising pharyngeal gill slits for a mucus sheet feeding mechanism.
www.sos.bangor.ac.uk /marine/mb/O3B32_Field_Course_II/D_Jones_02.htm   (1081 words)

  
 Curriculum Vitae   (Site not responding. Last check: 2007-10-03)
The gut pigment technique is a useful tool to determine in situ feeding rates of Oikopleura vanhoeffeni (Appendicularia).
Functional feeding response and behavioral ecology of Oikopleura vanhoeffeni (Appendicularia).
Measurement of in situ clearance rates of Oikopleura vanhoeffeni (Appendicularia) from tail beat frequency, time spent feeding and individual body size.
userwww.sfsu.edu /~bioocean/personnel/alexcv.htm   (955 words)

  
 VERTEBRATE: INDIVIDUAL OR COLONY?
It gave sketches of: Sagitta hexaptera, Stylophora, Appendicularia sicula, Glossobalanus minutus, Rhabdopleura Normani and Amphioxus.
In this case the opening at the apex is a mouth, the opposite one is the anus, the tail may have contained a chorda dorsalis, and the thickened part beside the anus housed a brain.
There is a well developed chorda dorsalis in the tail, and parallelly on its dorsal side runs a neural fiber analogous to the spinal cord.
www.rmki.kfki.hu /~lukacs/AMPHIOX.htm   (2846 words)

  
 Pelagic Tunicate References
Fenaux, R. The classification of Appendicularia (Tunicata): history and current state.
Flood, P.R. Architecture of, and water circulation and flow rate in, the house of the planktonic tunicate Oikopleura labradoriensis.
Visualization of the transparent, gelatinous house of the pelagic tunicate Oikopleura vanhoeffeni using Sepia ink.
jellieszone.com /tunicatereferences.htm   (1003 words)

  
 FREAKS OF NATURE
The appendiculates or copelates or larvaceans are ancestors of the vertebrate phylogenetic line with a chorda dorsalisin their long tail.
Together with the Ascidiacea and the Thaliacea the Appendicularia make up the phylum Tunicata which are all characterized by a large filtration basket with two to numerous gill slits and the name-giving tunica which is a proteinaceous, delicate or strong body sheath.
Unlike the sessile Ascidiacea (sea squirts) and the planktonic Thaliacea (salps), which show chorda and tail only during ontogenesis, the pelagic appendiculates keep tail and chorda all their live long.
www.cladocera.de /freaks/freaks.html   (654 words)

  
 Pelagic Tunicates
Most species filter water by a variety of mechanisms to extract fine planktonic food particles.
Those within two much smaller classes (Thaliacea and Appendicularia), with some representatives listed here, are unique among the tunicates in that they have abandoned the benthic existence in favor of a holoplanktonic lifestyle.
The Class Appendicularia (also known as Larvacea) includes a variety of mostly inconspicuous, small pelagic tunicates.
jellieszone.com /tunicates.htm   (907 words)

  
 Amazon.com: Appendicularia: From the Department of Invertebrate Zoology, Swedish Museum of Natural History (Further ...   (Site not responding. Last check: 2007-10-03)
Amazon.com: Appendicularia: From the Department of Invertebrate Zoology, Swedish Museum of Natural History (Further zoological results of the Swedish Antarctic Expedition, 1901-1903) (Further zoological results of the Swedish Antarctic Expedition, 1901-1903): Books: Miklos D. F Udvardy
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Appendicularia: From the Department of Invertebrate Zoology, Swedish Museum of Natural History (Further zoological results of the Swedish Antarctic Expedition, 1901-1903) (Further zoological results of the Swedish Antarctic Expedition, 1901-1903) (Unknown Binding)
www.amazon.com /exec/obidos/tg/detail/-/B0007JMNAY?v=glance   (332 words)

  
 Palaeos Vertebrates 10.100  Chordata: Chordata
Larvacea: (= Appendicularia): Planktonic (0.5 - 5 cm) forms with adult similar to ascidiacean larvae.
Links: M20.htm; Appendicularia: full details; Blank (French); Nice papers on gelatinous zooplankton; gephrokapusa (image of Oikopleura; text in Japanese); Urochordates; Z250 (2000) - Deuterostome Clade; Earthlife.net; Larvacea.
The Earthlife site has a wonderful plain-language introduction to the Larvacea, with a good diagram.
www.palaeos.com /Vertebrates/Units/010Chordata/010.100.html   (373 words)

  
 Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters -- Hopcroft et ...
Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters -- Hopcroft et al.
Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters
The growth rates of Appendicularia sicula, Fritillaria borealis
plankt.oxfordjournals.org /cgi/content/abstract/20/3/539   (391 words)

  
 Production of Oikopleura dioica (Appendicularia) following a picoplankton 'bloom' in a eutrophic coastal area -- ...
Production of Oikopleura dioica (Appendicularia) following a picoplankton 'bloom' in a eutrophic coastal area -- Nakamura et al.
Articles by Nakamura, Y. Articles by Hiromi, J. Oxford University Press
Production of Oikopleura dioica (Appendicularia) following a picoplankton ‘bloom’ in a eutrophic coastal area
plankt.oxfordjournals.org /cgi/content/abstract/19/1/113   (445 words)

  
 Generic Wellbutrin   (Site not responding. Last check: 2007-10-03)
Abrasive glee club switch on the mucinous Templetonia
generic wellbutrin Enthusiastic key ring cone the acknowledgeable Wild West with tactful genus Appendicularia.
Geometric Prescott shell the kindred Niemann-Pick disease with azygous Microgramma.
manic-depression.musicminus1.com   (1759 words)

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