Search found 4 matches

by Segundo
Fri Jan 22, 2010 11:21 am
Forum: General Discussion
Topic: Discretenes Required for Species Status
Replies: 4
Views: 2387

Re: Discretenes Required for Species Status

You appear to be saying that this particular issue is somewhat subjective/arbitrary which more or less is what I thought. With that in mind I personally think that a hybrid frequency of less than 2% is enough to warrant species status.
by Segundo
Fri Jan 22, 2010 4:00 am
Forum: General Discussion
Topic: Discretenes Required for Species Status
Replies: 4
Views: 2387

Re: Discretenes Required for Species Status

Say there are two populations of organisms which are morphological distinct, with a very strong reproductive barrier, say for example 2% of organisms are hybrids, would you classify such populations as races of a species or a single species? My gut tells me that 2% means such strong endogamy that on...
by Segundo
Thu Jan 21, 2010 10:41 pm
Forum: Zoology Discussion
Topic: Color Change
Replies: 36
Views: 37341

Re: Color Change

I believe cephalopods change colour by expanding and contracting vesicles (sacks) containing coloured fluid.
by Segundo
Thu Jan 21, 2010 10:35 pm
Forum: General Discussion
Topic: Discretenes Required for Species Status
Replies: 4
Views: 2387

Discretenes Required for Species Status

Hi,

I have been trying to find out how discrete a population need be before it is awarded species status. I assume the frequency of hybrids (if there are any) is the key factor, but I have no idea what the threshold is by convention.

Hopefully someone will be able to help me with this question.