NDLI: Differences in activity level between cownose rays (Rhinoptera bonasus) and Atlantic stingrays (Dasyatis sabina) are related to differences in heart mass, hemoglobin concentration, and gill surface area

Content Provider	Springer Nature Link
Author	Grim, Jeffrey M. Ding, A. Adam Bennett, Wayne A.
Copyright Year	2012
Abstract	Aquatic animals are faced with the challenge of extracting oxygen from water, a medium that is metabolically expensive to ventilate and that contains just a fraction of the oxygen concentration relative to air, yet the physiologies of fishes have evolved to support a wide range of activity levels in nature. Oxygen delivery components, including gill surface area (oxygen uptake), blood chemistry (oxygen transport), and the heart (system pump), have been positively correlated to activity level in teleost fishes, yet relatively little is known about how these components are related to activity in elasmobranches. The current study addresses this question by examining heart mass, hemoglobin concentration, hematocrit level, and gill surface area in wild-caught representatives of the benthic Atlantic stingray (Dasyatis sabina) and active cownose ray (Rhinoptera bonasus). Allometric scaling exponents are similar for all four measures between the study species. Heart mass, gill surfaces areas, and hemoglobin concentrations were 2.1 times, approximately 7.1 times, and 2.0 times higher, respectively, in active cownose rays, when compared to benthic Atlantic stingrays, after correcting for differences in body mass. When considered in the context of functional plasticity within the oxygen delivery systems of benthic and active species, data from the current study indicate that higher activity levels in cownose rays are supported by modifications that, at least in part, are likely to enhance oxygen uptake.
Starting Page	1409
Ending Page	1417
Page Count	9
File Format	PDF
ISSN	09201742
Journal	Fish Physiology and Biochemistry
Volume Number	38
Issue Number	5
e-ISSN	15735168
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Batoid elasmobranchs Hematology Heart mass Gill surface area Activity level Respiratory function Animal Anatomy / Morphology / Histology Zoology Animal Biochemistry Animal Physiology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Biochemistry Aquatic Science

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Differences in activity level between cownose rays (Rhinoptera bonasus) and Atlantic stingrays (Dasyatis sabina) are related to differences in heart mass, hemoglobin concentration, and gill surface area.

Hypoxia effects on gill surface area and blood oxygen-carrying capacity of the Atlantic stingray, Dasyatis sabina

Standard oxygen consumption of seasonally acclimatized cownose rays, Rhinoptera bonasus (Mitchill 1815), in the northern Gulf of Mexico

Migratory connectivity and philopatry of cownose rays Rhinoptera bonasus along the Atlantic coast, USA

Habitat-specific feeding by cownose rays (Rhinoptera bonasus) of the northern Gulf of Mexico

Spatial Distribution and Long-term Movement Patterns of Cownose Rays Rhinoptera bonasus Within an Estuarine River

Seasonal Occurrence of Cownose Rays (Rhinoptera bonasus) in North Carolina’s Estuarine and Coastal Waters

Residence and movement patterns of cownose rays Rhinoptera bonasus within a southwest Florida estuary (2007)

Effect of rapid temperature change on resting routine metabolic rates of two benthic elasmobranchs

Differences in activity level between cownose rays (Rhinoptera bonasus) and Atlantic stingrays (Dasyatis sabina) are related to differences in heart mass, hemoglobin concentration, and gill surface area

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Differences in activity level between cownose rays (Rhinoptera bonasus) and Atlantic stingrays (Dasyatis sabina) are related to differences in heart mass, hemoglobin concentration, and gill surface area.

Hypoxia effects on gill surface area and blood oxygen-carrying capacity of the Atlantic stingray, Dasyatis sabina

Standard oxygen consumption of seasonally acclimatized cownose rays, Rhinoptera bonasus (Mitchill 1815), in the northern Gulf of Mexico

Migratory connectivity and philopatry of cownose rays Rhinoptera bonasus along the Atlantic coast, USA

Habitat-specific feeding by cownose rays (Rhinoptera bonasus) of the northern Gulf of Mexico

Spatial Distribution and Long-term Movement Patterns of Cownose Rays Rhinoptera bonasus Within an Estuarine River

Seasonal Occurrence of Cownose Rays (Rhinoptera bonasus) in North Carolina’s Estuarine and Coastal Waters

Residence and movement patterns of cownose rays Rhinoptera bonasus within a southwest Florida estuary (2007)

Effect of rapid temperature change on resting routine metabolic rates of two benthic elasmobranchs

Differences in activity level between cownose rays (Rhinoptera bonasus) and Atlantic stingrays (Dasyatis sabina) are related to differences in heart mass, hemoglobin concentration, and gill surface area