Intestinal volvulus in a bowhead whale, Balaena mysticetus

Area of Science:

• Marine Mammal Pathology
• Veterinary Science
• Wildlife Health

Background:

• Bowhead whales (Balaena mysticetus) are Arctic baleen whales facing various health challenges.
• Understanding gastrointestinal pathologies is crucial for assessing the health and conservation of marine mammals.
• This case report details a specific intestinal condition in an adult female bowhead whale.

Observation:

• Necrosis was observed in a distinct section of the mid-jejunum and associated mesentery.
• Fibrinous peritonitis accompanied the intestinal necrosis.
• Mesenteric veins near the affected intestine showed severe dilation and hyperemia without thrombosis.

Findings:

• The primary cause of death was attributed to complications from intestinal volvulus and infarction.
• No gastrointestinal tract perforations were identified.
• The observed vascular changes suggest significant circulatory compromise.

Implications:

• This finding highlights the potential for gastrointestinal emergencies like volvulus in large marine mammals.
• Pathological data from stranded or deceased animals are vital for understanding whale health.
• Further research into the causes and prevalence of such conditions in bowhead whale populations is warranted.