Microscopic Findings in the Cardiac Muscle of Stranded Extreme Deep-Diving Cuvier's Beaked Whales (Ziphius cavirostris)

Author:

Câmara Nakita123ORCID,Fernández Antonio1ORCID,Herráez Pedro1ORCID,Arbelo Manuel1ORCID,Andrada Marisa1ORCID,Suárez-Santana Cristian M1ORCID,Sierra Eva1ORCID

Affiliation:

1. University of Las Palmas of Gran Canaria, Campus Universitario Cardones de Arucas Veterinary Histology and Pathology, Institute of Animal Health and Food Safety (IUSA), Veterinary School, , Trasmontaña s/n, Arucas, Las Palmas, Gran Canaria 35413, Spain

2. Plataforma Oceánica de Canarias (PLOCAN) , Carretera de Taliarte s/n, Telde, Las Palmas, Gran Canaria 35214, Spain

3. Loro Parque Foundation , Avenida Loro Parque s/n, Puerto de la Cruz, Tenerife 38400, Spain

Abstract

Abstract Considerable information has been gained over the last few decades on several disease processes afflicting free-ranging cetaceans from a pathologist's point of view. Nonetheless, there is still a dearth of studies on the hearts of these species. For this reason, we aimed to improve our understanding of cardiac histological lesions occurring in free-ranging stranded cetaceans and, more specifically, in deep-diving Cuvier's beaked whales. The primary cardiac lesions that have been described include vascular changes, such as congestion, edema, hemorrhage, leukocytosis, and intravascular coagulation; acute degenerative changes, which consist of contraction band necrosis, wavy fibers, cytoplasmic hypereosinophilia, and perinuclear vacuolization; infiltration of inflammatory cells; and finally, the presence and/or deposition of different substances, such as interstitial myoglobin globules, lipofuscin pigment, polysaccharide complexes, and intra- and/or extravascular gas emboli and vessel dilation. This study advances our current knowledge about the histopathological findings in the cardiac muscle of cetaceans, and more specifically, of Cuvier's beaked whales.

Funder

Ministerio de Economía y Competitividad

Ministerio de Ciencia, Innovación y Universidades

Publisher

Oxford University Press (OUP)

Subject

Instrumentation

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