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<p class="MsoPlainText">Dear INA subscribers,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">For those who are still counting only 300 specimens (when trying to be sure at 95%) or only 500 specimens (at 99%), please note:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><a href="https://arxiv.org/abs/1804.11226v2">https://arxiv.org/abs/1804.11226v2</a><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Any count should therefore be expanded in case you are trying to detect more than one taxon together in the same sample (same stratigraphic interval).<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">It includes easy-to-use tables to tell in each case how many specimens to count according to:<o:p></o:p></p>
<p class="MsoPlainText"> - how many species are to be detected using the same count.<o:p></o:p></p>
<p class="MsoPlainText"> - how sure you would like to be.<o:p></o:p></p>
<p class="MsoPlainText"> - what is the expected original proportion of each species in the population.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Basically, the procedure is the same as that of Dennison and Hay (1967), but using multinomial (instead of binomial) distribution.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The tables can be easily used even if the mathematical theory provided is not understood.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Regards,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Ali Haidar.<o:p></o:p></p>
<p class="MsoNormal"><span lang="NL"><o:p> </o:p></span></p>
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