One of the most common errors made whendesigning conservation studies is insufficientor biasedreplication. Replication essentiallymeansrepetitionof the experiment (Krebs1999) and is another type of sample size.
I can very well see how this creates very common errors. If you test over and over again on the same experiment there is bound to be insufficient information that is given in the wrap up. Being on the same terms and studying information that was given in the beginning experiment's will cut down a lot on replication. One scientist might give facts about this species in this sample size but the other scientists that test the same sample size might have different ideas about the experiment and that's where communication comes into play, and they need to work together to come up with a conservation study that makes sense and isn't a biased replication.