[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: T. rex's vision as SUPPORT for scavenging activitiy...
No, I am assuming an idealized environment for a generalized hypothetical
scenario; evolving long-range eyesight in a (bipedal) terrestrial predator that
uses distant visual cues for efficient utilization of fortuitous death(s). The
40 mile figure represents an approximate maximum distance (due to curvature of
the Earth) that visual cues can be detected.
As to Hell Creek and T.rex specifically, I'm guessing depositional bias is
there, as it always is.
----- Original Message ----
Sent: Monday, July 3, 2006 4:54:29 PM
Subject: Re: T. rex's vision as SUPPORT for scavenging activitiy...
In a message dated 7/3/2006 4:14:05 PM Eastern Standard Time,
<< The ability to detect fortuitous mortality in a timely fashion is
obviously critically important to efficient utilization of such resources, and
sense used for detection is therefore subject to strong directional selection.
IF there is the presence of a population of volant scavengers, then timely
visual cues (eg, circling vultures) to any local large animal death exist, and
are detectable from distances up to 40 miles in an open environment. >>
You are assuming Hell Creek environs were an "open environment". It's mostly
flood plain and stream channel deposits,with a tree canopy, is it not? Or is
that a deposital bias? DV