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Unusual record of Pacific harbor seal (Phoca vitulina richardii) feeding on anchovy (Engraulis mordax) in the fishery of small pelagic fishes in the Gulf of California

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Morphometric relationships of the siphon clam Panopea globosa (Bivalvia: Hiatellidae) in the southeasternmost of the Gulf of California, Mexico

Northernmost record of dusky dolphin Lagenorhynchus obscurus in coastal waters off northern Peru (4°S)

Authors

CORRESPONDING

Aldo S. Pacheco

babuchapv@yahoo.com

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3

Instituto de Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Avenida Angamos 601, Antofagasta, Chile

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Pacifico Adventures-Manejo Integral del Ambiente Marino S.A.C., Av. Rivera del Mar s/n, Los Órganos, Piura, Perú

Ana Paula Suárez

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Universidad San Francisco de Quito, Campus Cumbayá, Av. Diego de Robles e Interoceánica, Quito, Ecuador

Vanessa Jaramillo

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Ecología y Evolución de Vertebrados, Instituto de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 67 N° 53-108, Medellín, Colombia

Sebastián Silva

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Pacifico Adventures-Manejo Integral del Ambiente Marino S.A.C., Av. Rivera del Mar s/n, Los Órganos, Piura, Perú

Belén Alcorta

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Pacifico Adventures-Manejo Integral del Ambiente Marino S.A.C., Av. Rivera del Mar s/n, Los Órganos, Piura, Perú

Abstract

Dusky dolphin Lagenorhynchus obscurus is distributed primarily in cool coastal waters at several continental margins and island borders in the Southern Hemisphere. Off Peru, the northernmost record of this species has been in front of the coast of Salaverry (ca., 6°S). In this paper, we report for the first-time a pod of dusky dolphin at the coast of Los Órganos (4°9.517’S; 81°11.958’W) northern Peru, thus extending the potential distributional range ca., 350 km towards the equator. A group of between 10 to 20 adult individuals was sighted on 17 October 2017, during a whale-watching excursion. Digital photographs and film allowed us to confirm the species based on body morphology and coloration. The sighted group was moving around the area without heading to a given direction. This record constitutes the northernmost record of dusky dolphin in Peru and arguably in the Southern Hemisphere.

Key words

Vagrant individuals, Lagenorhynchus obscurus, whale-watching, upwelling, distribution, Peru

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