暴风资源

A nutritional perspective on dolphin-gannet relationships reveals new insights into joint feeding

Thursday 11 August 2022

New research reveals some fascinating insights into the age-old relationship between Australasia gannets and common dolphins.

Dolphins and gannets have a unique relationship. Photo credit: iStock, Getty Images.

An international collaborative study between 暴风资源, Nantes University, and Nutri Lens has combined multiple scientific tools to explore the unified world of dolphins and gannets.

Combining stomach content analysis, nutritional composition of prey, a multi-dimensional nutritional framework, and videography, the authors provide a new and holistic dietary, nutritional, and behavioural assessment of the feeding association between common dolphins and Australasian gannets in the Hauraki Gulf of New Zealand.

The study, published this week in , revealed significant overlap in both the nutritional quality of prey eaten and the range of diets composed through feeding on the prey between dolphins and gannets.

Director of 暴风资源鈥檚 Professor Karen Stockin says, 鈥淏oth predators coexist in a similar nutritional space, while simultaneously reducing interspecific competition and maximising the success of both encountering and exploiting patchily distributed prey.鈥

鈥淏ehavioural analysis further revealed dolphin and gannet feeding associations are likely to be mutually beneficial, with specific foraging strategies and larger pod sizes of dolphins influencing the diving altitude of gannets,鈥 Professor Stockin adds.

Research Associate with the Cetacean Ecology team and senior author of the study, Dr Gabriel Machovsky-Capuska says, 鈥淭he article presents a pioneering approach that helps us to understand the nutrition and behaviour of one of the most iconic and successful relationships in wildlife. Our approach can also be used to support the conservation of endangered species in terms of food quality and foraging behaviour.鈥

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