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Bioécologie

Que veut dire "statistiquement significatif" ?

12 Mai 2009,

Publié par JMB

Dans de nombreuses disciplines scientifiques, un consensus s'est fait pour considérer qu'une différence est "statistiquement significative" si le hasard a moins de 5 chances sur 100 d'expliquer les différences observées.

Lire la suite de l'article de C. Mélot pour en savoir un peu plus sur ce "statistiquement significatif": ici



Un exemple :

Image


Fig. 4. Evolution of biomass of Tubifex tubifex worms after 12-day exposure to the seven experimental treatments (initial uranium concentrations in the sediment). Means±S.D. (N=3). Different letters correspond to significant differences (P<0.001, one-way ANOVA; P<0.05, Newmans–Keuls test).

From: Lagauzère S, Terrail R, Bonzom J-M, 2009. Ecotoxic effects of uranium on Tubifex Tubifex worms (Oligochaeta, Tubificidae) exposed to contaminated sediment. Ecotoxicology and Environmental Safety. 72, 527-537.
(More informations: contact me)

FishBase

4 Mai 2009,

Publié par JMB

A Global Information System on Fishes

FishBase is a relational database with information to cater to different professionals such as research scientists, fisheries managers, zoologists and many more.  FishBase on the web contains practically all fish species known to science.


 

FishBase was developed at the WorldFish Center in collaboration with the Food and Agriculture Organization of the United Nations (FAO) and many other partners, and with support from the European Commission (EC). Since 2001 FishBase is supported by a consortium of seven research institutions.