cocorrico

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@@ -0,0 +1,14 @@
+[[!meta title="Cycle vital d'un Appendiculaire Oikopleura dioica Fol, 1872 : description et chronologie"]]
+[[!tag Oikopleura]]
+
+Robert Fenaux
+
+Cycle vital d'un Appendiculaire _Oikopleura dioica_ Fol, 1872 : description et chronologie
+
+Ann. Inst. Oceanogr. Paris (1976) 52, 89-101 https://cir.nii.ac.jp/crid/1571417125678584576
+
+[[!url https://cir.nii.ac.jp/crid/1571417125678584576 desc="High sperm
+concentration leads to polyspermia, aborted cell divisions, and early
+developmental arrest.  Egg diameter between 97 and 107 µm.  The trunk / tail
+length ratio varies with age and can be matched with a Bertalanffy model.  Fed
+with _Nannochloris occulata_."]]

diff --git a/tags/Oikopleura.mdwn b/tags/Oikopleura.mdwn
index eea3da107051fe2f78608f4ac9c78aa6f5ee502f..6c4d13367eb457bc8412f1b752ea8ac839c2b93a 100644 (file)
--- a/tags/Oikopleura.mdwn
+++ b/tags/Oikopleura.mdwn
@@ -367,6 +367,8 @@ Tools
 Development
 -----------
 
+### Gametes
+
  - The oocytes originate from a specialised syncitium, the coenocyst, in which
    nurse cells and oocytes are connected by cytoplasmic bridges, the ring channels
    ([[Ganot and coll., 2007|biblio/17126826]]).
@@ -378,18 +380,34 @@ Development
  - Inhibition of the MAPK pathway cause some nurse cell nuclei to enter the
    oocyte through the ring channels ([[Ganot, Moosmann-Schulmeister and Thompson,
    2008|biblio/18845138]]).
+ - Egg diameter in females from (probably) Villefranche-sur-mer: 97 to 107 µm
+   ([[Fenaux, 1976|biblio/1571417125678584576]]). 
+ - Increased food abundance increases egg number but does not change diameter nor
+   generation time ([[Troedsson and coll., 2002|biblio/10.3354_meps243083]]).
+   Food reduction before day 4 causes growth arrest (GA), in which all cell cycles
+   eventually pause.  Animals in GA can survive ~18 days at 15°C.  GA can also be
+   induced by inhibiting the TOR pathway ([[Subramaniam, Campsteijn and Thompson,
+   2014|biblio/24695788]]).
+ - Meiosis is resumed by change of extracellular pH when the oocytes are released
+   in seawater.  Partenogenesis starts if PP2A is inhibited by DNAi or with
+   okadaic acid ([[Matsuo and coll., 2020|biblio/31857067]).
+ - Colchicine treatment induced early differenciation of the oocytes
+   ([[Ganot, Kallesøe, Thompson (2007)|biblio/17123503]]).
+
+### Fertilization and early stages
+
  - The sperm's mitochondrion enters the oocyte together with the nucleus
    ([[Holland, Gorsky and Fenaux, 1988|biblio/10.1007_BF00312223]]).
  - The first and second polar bodies are visible 5 and 15 min after fertilisation,
    respectively ([[Nishino and Morisawa, 1998|biblio/10.2108_zsj.15.723]]).
- - Meiosis is resumed by change of extracellular pH when the oocytes are released
-   in seawater.  Partenogenesis starts if PP2A is inhibited by DNAi or with
-   okadaic acid ([[Matsuo and coll., 2020|biblio/31857067]).
  - First embryonic cleavages are deterministic and “Clonal organization of the
    tissues is essentially invariant among individuals” ([[Stach and coll.,
    2008|biblio/18490654]]).
- - Colchicine treatment induced early differenciation of the oocytes
-   ([[Ganot, Kallesøe, Thompson (2007)|biblio/17123503]]).
+ - Fertilization in high sperm concentration leads to polyspermia
+   ([[Fenaux, 1976|biblio/1571417125678584576]]).
+
+### Other
+
  - Generation times shortens when temperature rises.  First spawnings are seen
    on day 6 at 14.2 °C, and on day 8 at 17.2 °C ([[Bouquet and coll.,
    2018|biblio/29298334]]).  Reported generation times in the litterature: 149 ± 2
@@ -402,12 +420,6 @@ Development
    1995|biblio/10.1016_0022-0981_95_00004-B]]).  Tôkyô bay _O. dioica_ under
    laboratory condiditons:  6 days at 15°C, 4 days at 20°C and 3 days at 25°C
    ([[Sato, Tanaka and Ishimaru, 2001|biblio/10.1093_plankt_23.4.415]]).
- - Increased food abundance increases egg number but does not change diameter nor
-   generation time ([[Troedsson and coll., 2002|biblio/10.3354_meps243083]]).
-   Food reduction before day 4 causes growth arrest (GA), in which all cell cycles
-   eventually pause.  Animals in GA can survive ~18 days at 15°C.  GA can also be
-   induced by inhibiting the TOR pathway ([[Subramaniam, Campsteijn and Thompson,
-   2014|biblio/24695788]]).
  - Large animals (~5 mm body length) could be cultivated when provided with large
    amounts of food ([[Li and Zhang, 2021|biblio/10.1007_s00343-020-0071-0]]).
  - Telomeres are localised at the nuclear envelope and do not overlap with nuclear
@@ -746,6 +758,9 @@ Culture protocols (incomplete list):
 
 Food tested in laboratory (totally incomplete list):
 
+ - [[Fenaux 1976|biblio/1571417125678584576]] reported the use of [_Nanochloropsis oceanica_][]
+   (under the name _Nanochloris occulata_) (2 to 3 µm according to Wikipedia).
+
  - Flagellates [_Isochrysis galbana_][] (4 µm width) and _Monochrysis lutheri_ (4 µm
    width), and the diatom _Cyclotella nana_ (Thalassiosira pseudonana) which had
    a width of 5 µm ([[G.-A. Paffenhöfer, 1973|biblio/10.1007_BF00391782]]).
@@ -776,5 +791,6 @@ Food tested in laboratory (totally incomplete list):
 [_Rhinomonas reticulata_]:  https://en.wikipedia.org/wiki/Rhinomonas
 [_Synechococcus sp._]:      https://en.wikipedia.org/wiki/Synechococcus
 [_Tetraselmis suecica_]:    https://en.wikipedia.org/wiki/Tetraselmis_suecica
+[_Nanochloropsis oceanica_]: https://en.wikipedia.org/wiki/Nannochloropsis
 
 [[!inline pages="tagged(Oikopleura)" actions="no" limit=0]]