PMID: 9548653Apr 21, 1998Paper

Blood volume and diving ability of the New Zealand sea lion, Phocarctos hookeri

Physiological Zoology
Daniel P CostaD E Crocker

Abstract

We test the hypothesis that the New Zealand sea lion is physiologically better equipped for prolonged, continuous diving than other otariids (fur seals and sea lions) by measuring its blood volume, an important component of its oxygen storage. Mass, hematocrit, and plasma volume were measured and blood volume calculations were completed on 14 adult females and five juvenile females. Plasma volume was determined using the Evans blue dye dilution technique. Mean plasma volume for all subjects was 74 mL kg(-1). Mass-specific plasma volume was significantly higher in adult females (15.3%) than in juveniles (14.6%). Blood volume (150 mL kg(-1)) and hematocrit (51%) were not significantly different between adults and juveniles. The aerobic dive limit can be estimated by dividing the animal's oxygen stores by its metabolic rate. The estimated aerobic dive limit for adult animals was between 5.5 and 7.8 min, depending on the assumed metabolic rate. New Zealand sea lions have the highest blood volume yet reported for an otariid, which supports the hypothesis that they have a physiological capability suited to their unique diving behavior.

Citations

Apr 26, 2014·PeerJ·James F Gillooly, Rosana Zenil-Ferguson
Mar 4, 2006·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Julie P RichmondLorrie D Rea
Feb 13, 2007·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·L M Spence-BaileyJ P Y Arnould
Jun 20, 2007·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·J M BurnsA S Blix
Sep 22, 2011·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·S R NorenL Cornell
Jan 29, 2013·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Carling D GerlinskyAndrew W Trites
May 9, 2012·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Stella Villegas-AmtmannDaniel P Costa
Dec 12, 2019·Royal Society Open Science·S P KirkmanJ P Y Arnould
May 22, 2002·Australian Veterinary Journal·P ClarkP J Duignan
Sep 9, 2015·The Journal of Experimental Biology·Shawn R NorenAnthony S Fischbach
Jan 11, 2007·The Journal of Experimental Biology·Michael J Weise, Daniel P Costa
Feb 2, 2010·The Journal of Experimental Biology·J L HassrickD P Costa
Jul 7, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·D P CostaM E Goebel
May 18, 2021·Marine Environmental Research·Susana Cárdenas-AlayzaYann Tremblay

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