Lipid and fatty acid profiles of migrating Southern Hemisphere humpback whales Megaptera novaeangliae

摘要: The lipid and fatty acid (FA) composition of the outer blubber layer was characterized in 46 east Australian migrating humpback whales Megaptera novaeangliae. Samples were obtained at 2 time points annual migration, which occurs between Antarctic feeding grounds low-latitude breeding is associated with a prolonged period fasting. Blubber dominated by triacylglycerols all individuals, FA profiles both migration cohorts sexes monounsaturated acids (MUFA). Results indicate that males primarily mobilise polyunsaturated response to fasting, favouring most readily utilisable as governed their physicochemical properties. In comparison, females appear initially short-chain (<18 carbons) MUFA stores, potentially attend dependent calves' thermoregulatory needs. Feeding ecology investigations suggested have species-specific blubber, including detectable influence diet. This study provides first insight into Southern Hemisphere whales. A comprehensive understanding dynamics, especially during times energy deficit, essential for nutritional status thereby risks posed growing environmental threats toxic persistent lipophilic pollutants.