From: Charles Date: Fri, 18 Jun 2021 08:50:14 +0000 (+0900) Subject: Oik X-Git-Url: https://source.charles.plessy.org/?a=commitdiff_plain;h=b265e33c108917967932b433d9b4bcb8cebdb238;p=setup%2F.git Oik --- diff --git a/biblio/10.1007_s00343-020-0071-0.mdwn b/biblio/10.1007_s00343-020-0071-0.mdwn new file mode 100644 index 00000000..4ab803e3 --- /dev/null +++ b/biblio/10.1007_s00343-020-0071-0.mdwn @@ -0,0 +1,26 @@ +[[!meta title="Role of intraspecific competition in intrinsic growth rate regulation in an Oikopleura dioica (Tunicata) population"]] +[[!tag Oikopleura]] + +Li, S., Zhang, G. + +J. Ocean. Limnol. 39, 609–622 (2021). doi:10.1007/s00343-020-0071-0 + +Role of intraspecific competition in intrinsic growth rate regulation in an _Oikopleura dioica_ (Tunicata) population. + +[[!doi 10.1007/s00343-020-0071-0 desc="_O. dioica_ found in Jiaozhou Bay, Qingdao, China and cultured at 18 °C. Generation time of 4.5 days. Largest animals tend to appear with low density of individuals and large amounts of food."]] + +“Individuals of Oikopleura dioica (Tunicata, Appendicularia) were collected in the Jiaozhou Bay, Qingdao, China (35°03′N, 120°20′E) on June 20, 2017, using a plankton net with a large-volume cod-end (10L). The samples were diluted into 50 L buckets and transported immediately to the laboratory, where healthy individuals were sorted and cultured in a small room (approximately 10 m2) maintained at 18 ± 1°C using a standard air conditioner.” + +“parental animals were forced to release their gametes by gentle aspiration in a pipette. Then, all dishes were placed in a speed-regulating vibrator (HY-4H) rotating at 60 r/min for 5 min to mix the eggs and male gametes together, and this time was considered time zero (D0).” + +“To control the food concentration, a mono-diet of Isochrysis galbana was adopted for all treatments.” + +“From gamete production, the entire incubation duration was 4 d and 12 h.” + +“The body length of O. dioica was 145 ± 17 μm on average after 15 h of metamorphosis.” “ On average, body lengths of 324–549 μm were achieved at the end of the experiments.” “At each food level, both the final body and gonad length decreased on average with density.” + +“Calculated with a fixed generation duration of 4.5 d, the mean maximal intrinsic rate of natural increase (rmax) varied between 0.25 and 0.65/d” + +“In general, the population growth was significantly regulated by the PFS. The rmax was increased with the PFS and was saturated at values higher than 8.1 μg C/ind.” + +“Though the mortality recorded in our experiments was generally higher at low food concentrations, it is uncertain whether mortality increased with increased competition stress.” diff --git a/tags/Oikopleura.mdwn b/tags/Oikopleura.mdwn index 86c71c2c..befcf656 100644 --- a/tags/Oikopleura.mdwn +++ b/tags/Oikopleura.mdwn @@ -368,6 +368,8 @@ Development 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 pore complexes in early meiotic oocytes before H3S10 phosphorylation. In nurse cells at a later stage of oocyte development, the telomeres localise in silent @@ -587,6 +589,8 @@ Ecology - In the northern south China sea, _O. longicauda_ and _O. rufescens_ were reported to be more abundant than _O. dioica_ in 2006 by ([[Li and coll., 2012|biblio/10.1007_s13131-012-0243-7]]). + - _O. dioica_ captured in 2017 from Jiaozhou Bay, Qingdao, China (35°03′N, 120°20′E) + could be cultivated at 18 °C ([[Li and Zhang, 2021|biblio/10.1007_s00343-020-0071-0]]). - _O. dioica_ and _O. longicauda_ were found throurought 2006-2007 in the Yellow sea ([[Franco, Chen and Li, 2014|biblio/10.1007_s11802-014-2376-0]]). Abundance peaked is spring, but the animals could also be found in winter when water temperature