Didn't realize at first that this thread goes back to 2014, but since it got bumped, and I just read through the entire thing, there's a glaring omission in the discussion about whether a biologist's witness account holds more credibility.
Let's look at it this way....
"Joe Six-pack" a local mill worker and known member of his community, goes into the woods and has what he believes is a Sasquatch siting.
"Holly Troutnetter" a state fisheries biologist is working near a creek, and observes a Bigfoot sipping water from the creek a hundred yards downstream, until it sees her and bolts off into the woods.
Aside from their knowledge (or lack ) of local fauna, and considering their difference in education, is there really any reason to find Holly's report more credible than Joe's? In my opinion no, there is not..... not at least based on their knowledge of what they believe they've seen. The difference of Holly being in a science oriented profession, does not make her a more credible witness- unless she's willing to stick her neck out and make a claim in a public setting. Joe can do so, and if he's not taken seriously, he'll get some strange looks from people for a while, and take some ribbing from co-workers, but if Holly does so- she's jeopardizing her career, her reputation, and has alot more at stake than Joe does.
Now, the main reason i don't attribute any higher level of credibility, is that the report cited from the OP in this case, is from a biologist who made a report on an anonymous reporting site, and although the veracity of the biologist's profession may have been followed through on, this biologist is still playing it very safe by making a report of this kind.
Did he go to his boss, or on the local news, or include his name and credentials while making his report ?
No, he did not, and so therefore it's (as several others have already stated) its just another anecdotal story, from a person who happens to be a biologist at the local zoo/animal park.
I get it... the fear of ridicule is powerful enough to keep some witness's quiet. Adding the fear of professional/career suicide is a whole other rationale for not coming forward in a more public way.