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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Marine & Wildlife Sign in to save

DIET OF Phalacrocorax bougainvillii “GUANAY” IN NORTH CHINCHA ISLAND, PISCO-PERU. MARCH-SEPTEMBER 2019

REBIOL 2023
Ronald Wilmer Marcial Ramos, Rayza Isabella Calle Apolo

Summary

Researchers analyzed the diet of guanay cormorants on Chincha Norte Island, Peru, from March to September 2019. They identified 17 prey species in collected boluses, primarily anchovy and other fish. The findings provide baseline ecological data for monitoring food web dynamics in this coastal Peruvian ecosystem.

Body Systems
Reproductive

In order to determine the species that make up the diet of Phalacrocorax bougainvillii, "guanay" on Chincha Norte Island from March to September 2019, 55 monthly residual boluses were collected and analyzed, covering settlement and reproduction stages. 17 prey species were recorded (15 fish, 1 cephalopod and 1 crustacean). Engraulis ringens “anchoveta” was the most abundant prey in both stages, with 95.91% of the otoliths (n=27 020), of which 68.19% correspond to adults and 31.81% to juveniles. The Levins index shows that P. bougainvillii is a specialist predator. In addition, elements not typical of the diet were found in the residual boluses, such as isopods 10.65%, lice 2.08%, ticks 0.52% and microplastics 7.01%.

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