K
K. V. Ponganis
Researcher at University of California, San Diego
Publications - 13
Citations - 727
K. V. Ponganis is an academic researcher from University of California, San Diego. The author has contributed to research in topics: Heart rate & Diving bird. The author has an hindex of 13, co-authored 13 publications receiving 681 citations.
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Journal ArticleDOI
Swimming velocities in otariids
Paul J. Ponganis,Edward P. Ponganis,K. V. Ponganis,Gerald L. Kooyman,Roger L. Gentry,Fritz Trillmich +5 more
TL;DR: Velocities during surface swimming and diving were measured with microprocessor recorders in four otariid species: northern fur seals (Callorhinus ursinus), Galapagos sea lions (Zalophus california...
Journal ArticleDOI
Heart rates and swim speeds of emperor penguins diving under sea ice
Gerald L. Kooyman,Paul J. Ponganis,Michael A. Castellini,Edward P. Ponganis,K. V. Ponganis,P. H. Thorson,S A Eckert,Y LeMaho +7 more
TL;DR: The swim speeds and heart rates suggest that muscle O2 depletion must occur frequently: therefore, many dives require a significant energy contribution from anaerobic glycolysis.
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Regional heterothermy and conservation of core temperature in emperor penguins diving under sea ice.
TL;DR: These findings and the lack of negative correlations between internal temperatures and diving duration do not support a role for hypothermia-induced metabolic suppression of the abdominal organs as a mechanism of extension of aerobic dive time in emperor penguins diving at the isolated dive hole.
Journal ArticleDOI
Heart rate regulation and extreme bradycardia in diving emperor penguins.
TL;DR: Maximum instantaneous surface interval fH in this study is the highest ever recorded for emperor penguins (256 beats min–1), equivalent to fH at V̇O2 max.
Journal ArticleDOI
Returning on empty: extreme blood O2 depletion underlies dive capacity of emperor penguins.
Paul J. Ponganis,T. K. Stockard,Jessica U. Meir,Cassondra L. Williams,K. V. Ponganis,R. P. van Dam,R. Howard +6 more
TL;DR: A relatively higher-affinity Hb is consistent with blood PO2 values and O2 contents of penguins at rest, which necessitates biochemical and molecular adaptations, including a shift in the O2–Hb dissociation curve of the emperor penguin in comparison to those of most birds.