Michael T. Walsh, DVM; Jack Pearson; Robert C. Wagoner
The causes of cetacean strandings are varied with the vast majority
related to illness. Excluding animals who strand as a result of environmental accidents or who
are led to shore in mass stranding, the survival rate for stranded cetaceans in general is low
as a result of numerous factors. These include the type, severity and duration of illness, the
severity and duration of secondary complications such as dehydration, and appropriate medical
intervention used. The challenges facing the rehabilitation team are greatly complicated when
attempting to apply critical care principles to the larger whale species.
On 11-25-88 a single female Brydes whale, (Balaenontera edeni) 693
cm long and approximately 2 years of age stranded 600 yards off shore in shallow water near
Clearwater on the west coast of Florida. The animal was clinically weak and did not resist
attempts at movement. It was transported to Sea World of Florida and placed in a cetacean pool
for diagnostic and therapeutic purposes. Initial blood work revealed an elevated serum
creatinine (3.9mg/dl), and severe leukopoenia (2,200mm3). Numerous attempts at feeding fish and
or krill were non-productive with the majority of the food held overnight in the mouth. To
minimize weight loss the animal was tubed with a fish gruel which eventually reached a daily
volume of 21 gallons providing 120,000 Kcal of energy/day. The diet consisted of 66 cans of
Two-calR (a high caloric supplement used in humans, 2 calories per cc) and ground
fish (20 lbs. of ground bonita) given 3x/day. Daily care of the whale involved stretchering 3
times a day for feeding with handling time minimized. After regaining weight initially lost
after rescue and re-establishing normal blood parameters, it was determined that without an
extremely large pool to allow normal exercise the whale would eventually deteriorate so it was
decided to release her while she still had a chance to survive. A large cradle was constructed
for handling and the whale was transported by truck to the west coast of Florida and placed on
a coast guard vessel and released 120 miles offshore in the hope that deeper water would allow
better access to feeding areas. A satellite tracking device attached to the dorsal fin allowed
scientists at the University of Oregon to monitor the animal for 10 days until the signal was
lost.
The care of this Brydes Whale illustrates that larger whale species which
strand can in some cases be given appropriate aid which may result in survival. In addition
valuable biologic and medical information can be compiled which can be applied to future
stranding events.
Two-CalRHN, Ross Laboratories, Columbus, Ohio 4321.