Brice twice

[Thomas Daniel <danielt@u.washington.edu>]

This week in Mathbiology (114 Kincaid Hall at 1230 W,F) is another two
timer:

Brice will speak both days on

Multi-site multi-species trends: a new tool for coral reef managers
B. Semmens, J. Ruesink, and C. Pattengill-Semmens

ABSRACT
Coral reefs are subject to major anthropogenic impacts worldwide and
sites in decline are prime candidates
for management and restoration. In assessing trends, it is imperative to

have data from a wide area, over
several years, and for many species. We assessed trends in 50 common
coral reef fishes at 21 sites
throughout the Florida Keys National Marine Sanctuary, based on
volunteer surveys for the Reef
Environmental Education Foundation (REEF) from 1993-1999. Analytical
techniques were modified from
those applied to the Breeding Bird Survey to detect sites with
multi-species declines (ordered logistic
regression followed by probit-normal analysis). Our results identify a
subset of reef sites where trends
were relatively poor for most fish species. At East Sambo in particular,

a shift in fishing pressure may be
reducing the density of fishes. No clear differences in trends were
evident where fishing was prohibited in
1997 relative to other fished sites throughout the Florida Keys,
although the expectation is that fish should
increase in the future. As volunteer-generated data continue to
accumulate, they will provide increasingly
useful indicators of community level changes.

---- Begin included message ----

• To: danielt@u.washington.edu
• Subject: title and abstract
• From: Brice Xavier Semmens <semmens@u.washington.edu>
• Date: Wed, 16 Jan 2008 10:10:56 -0800

Hi Tom--

Here is the title and abstract of the stuff I will be talking about in
mathbio.  I have written this work up and submitted it to the
proceedings from the International Coral Reef Symposium, and I am now in
the process of adding a bit more onto it so that I (we) can submit it to
a journal... not sure which one yet.

-b


Multi-site multi-species trends: a new tool for coral reef managers
B. Semmens, J. Ruesink, and C. Pattengill-Semmens

ABSRACT
Coral reefs are subject to major anthropogenic impacts worldwide and
sites in decline are prime candidates
for management and restoration. In assessing trends, it is imperative to
have data from a wide area, over
several years, and for many species. We assessed trends in 50 common
coral reef fishes at 21 sites
throughout the Florida Keys National Marine Sanctuary, based on
volunteer surveys for the Reef
Environmental Education Foundation (REEF) from 1993-1999. Analytical
techniques were modified from
those applied to the Breeding Bird Survey to detect sites with
multi-species declines (ordered logistic
regression followed by probit-normal analysis). Our results identify a
subset of reef sites where trends
were relatively poor for most fish species. At East Sambo in particular,
a shift in fishing pressure may be
reducing the density of fishes. No clear differences in trends were
evident where fishing was prohibited in
1997 relative to other fished sites throughout the Florida Keys,
although the expectation is that fish should
increase in the future. As volunteer-generated data continue to
accumulate, they will provide increasingly
useful indicators of community level changes.

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