Douglas' Field Notes
11/23/04:
11/19/04:
Douglas' blood values came back normal but the decision has been made to bring him back into captivity before the onset of the approaching winter months due to his low weight, girths and back fat. We hope to put a crew together for a capture early next week.
11/18/04:
Douglas
was captured on 11/18 in Deering Estate’s boat basin to assess his condition
based on some abnormal behavior observed over the past week.
Douglas lost his tag during the weekend of 11/6 and the tag showed signs
of trauma from a boat impact.
During an observation on 11/11, Douglas was noted to have increased
respirations (2-3 breaths during 3 minute windows) compared to his normal
activity rate of 1 breath every 3-4 minutes or 2 sequential breaths every 7-9
minutes while resting.
On 11/16, Douglas was again noted over a three hour period to still have
an increased respiration rate (example: 15 breaths in 23 minutes; 20 breaths in
20 minutes).
Dr. Maya was contacted and it was decided to catch Douglas to assess his
condition.
SeaWorld agreed to bring their capture boat down and a “now rather than
later” approach was taken to get our hands on Douglas. The
thought before the capture was that the increased respiration rate might be
because Douglas had been hit by a boat and was responding to injuries.
Another possible explanation was that he might be having difficulty
thermoregulating due to recent temperature changes (decrease from 25 to 21
degrees Celcius during the past week).
While feeding over grass flats with six other animals on 11/17, Douglas
was observed taking 2-3 breaths during 3 minute windows, while the other animals
were only taking 1 breath every 3-4 minutes.
His resting breathing rate was 1 breath every 3 minutes compared to other
animals (except mother/calf pairs) 1-2 breaths every 7-8 minutes.
It should be noted that most of his activity levels appeared normal –
feeding, socializing and traveling as normal.
He had been observed floating at the surface on multiple occasions with
only his shoulder area exposed at the surface of the water and not where the
middle of the back is usually exposed (just something else that was “odd”).
Even
though there were seven other animals in the boat basin, we only caught Douglas
and on the first set too.
Blood, morphometrics, fecal, stomach sample, ultrasound and weight were
obtained.
Dr. Maya from Miami Seaquarium gave Douglas an overall condition of fair,
with a body score of 2+.
He had lost 75 lbs since his last assessment (9.3%). A slight appearance
of a peanut shape head was noted with ribs almost detectable.
No apparent wound or swelling was observed and he appeared symmetrical.
Blood values are pending.
11/8/04:
9/16/04:
8/31/04:
Blood,
morphometrics, fecal, stomach sample, skin, ultrasound and weight were obtained.
Dr. Maya from Miami Seaquarium gave
Monthly
underwater visual observations have suggested that between the month of July and
August, Douglas started to gain stomach mass.
He has also been spending more time in the mornings out on the grass
flats. Brooks actually appeared to
have more mass than other males his size observed in the
Thank
you to the crew of SeaWorld and Miami Seaquarium for hanging in there so we
could get this assessment accomplished. Also,
big thanks to Deering Estate and their staff for helping us on site during the
capture and all those days we are out there getting our visuals on
FYI for those that still like to hear about Brooks, he was with Douglas Saturday 8/28 at Deering Estate.
8/5/04:
Douglas continues to use the Deering Estate boat basin primarily during the day to rest or socialize with other manatees. He has been noted to move out of the basin around 6pm onto the grass flats and feed...sometimes leader, sometimes follower. ARGOS has indicated he is usually north or south of the basin during the evening/night in locations known to have large beds of Thallasia or Halodule seagrass. Deering Estate boat basin offers several freshwater drinking locations for the animals. Storm water drainage is apparent along several locations on the seawall but more importantly there is a limestone upwelling located on the southwest side of the seawall where animals are routinely observed mouthing over the bottom boil. Douglas has been observed over this location mouthing the bottom and then falling asleep right over it. It is one of the cooler spots in the basin too.
6/10/04:
Pictures from health assessment
We were finally able to conduct Douglas' 2-3
month health assessment this past Tuesday 6/8. He was at Deering Estate
resting with two other animals in the boat basin. We preset the net
towards the end of the basin and encouraged him to leave the basin by putting a
swimmer in the water. Lucky for us, we were able to catch him on the first
set because he hit the net and got himself entangled in the net. Typical
first capture behavior for a rehab animal. We did not catch either of the
other two animals and by the way, Brooks was one of the other animals.
Blood, morphometrics, fecal, stomach sample, skin, ultrasound and weight were
obtained. Dr. Maya from Miami Seaquarium gave Douglas an overall condition
of excellent, with a body score of 3+. He loss 140 lbs since his last
assessment (14%) but still has more body mass on him compared to other manatees
his size in the South Florida area. Final blood values are pending.
Ultrasound readings showed decreases at his peduncle and anus measurements.
His umbilicus readings indicated a larger depth in back fat than
"wild" subjects previously measured. Monthly underwater visual
observations have indicated that Brooks has been increasing in body mass since
early December. Manatees in the SE Florida area appear leaner in
comparison to manatees observed in Blue Springs, Tampa Bay and Crystal River.
Brooks actually appeared to have more mass than other males his size observed in
the Miami area over the past few months.
Thank you to the crew of SeaWorld and Miami Seaquarium for hanging in there so
we could get this assessment accomplished. Also, big thanks to Deering
Estate and their staff for helping us on site during the capture and all those
days we are out there getting our visuals on Douglas.
4/20/04:

Douglas socializing above.
Douglas has remained between Blackpoint and
Deering Estate since his release on 3/3/04. He made a very quick trip to
Deering Estate the day after his release focusing all his attention on a large
female. He was observed at Deering Estate on 3/8 with seven other manatees
socializing and resting in the basin and cavorting with five animals the
following day. Public visuals reported by Deering Estate staff noted that
Douglas was seen over the next few days alone or with other manatees in their
boat basin primarily bottom resting. On 3/18, he was observed traveling
into Deering Estate's basin with four manatees and all immediately began to
bottom rest. Douglas was easily disturbed from his rest when a group of
students began to work near the seawall and he continued to mill around the
basin until the visual observation was terminated. ARGOS locations
indicated that he made a quick trip to Blackpoint on 3/20 and then back to
Deering Estate the next day. Douglas was again seen with four animals on
3/24 in Deering Estate's basin and was tracked traveling outside the basin into
choppy waters with these animals. The next two weeks of visuals found
Douglas alone but two times he was seen outside the basin in an area full of
"preferred" manatee seagrasses. It appeared he was feeding on
Halodule seagrass on 4/16 from the way he was lifting his head out of the water
to get air. Douglas made another quick trip to Blackpoint on 4/17 and was
observed back at Deering Estate two days later bottom resting with one other
animal. An underwater visual was attempted to assess Douglas' body
condition and he avoided the snorkeler very well, thus only a quick look was
obtained of his belly. He did not have a concaved in stomach or rolls nor
did he have any obvious signs of extensive weight loss but he has lost some body
mass as expected. The areas outside Deering Estate's basin were Douglas
has been seen were investigated and these areas had newly grazed beds of
Halodule seagrass. Hopefully he has put his mark in the beds.