NDLI: Ecological physiology of the anchialine shrimp Barbouria cubensis: a comparison of epigean and hypogean populations

Content Provider	Springer Nature Link
Author	Bishop, Renee E. Iliffe, Thomas M.
Copyright Year	2012
Abstract	Stygobites have morphological, ethological and physiological adaptations for their subterranean existence. Included in the physiological adaptations of hypogean organisms is a reduced metabolism with respect to related epigean organisms. Our objectives were to examine the physiological adaptations of the shrimp, Barbouria cubensis, to the anchialine environment through the use of energetics. Barbouria cubensis were collected from oxic anchialine pools in the Bahamas and from a dysoxic cave system in the Yucatan Peninsula of Mexico. Metabolism was addressed via direct measurement of oxygen consumption using microcathode oxygen electrodes as well as the activities of three primary metabolic enzymes, citrate synthase (CS), lactate dehydrogenase (LDH), and malate dehydrogenase (MDH). Additionally, protein and lipid content were determined. Respiration rates of the B. cubensis from the oxic environment were lower than reported values for other epigean crustaceans but greater than reported values for stygobitic crayfish. The specimens collected from the dysoxic environment in the Yucatan differed significantly (p < 0.01) from the specimens collected in the oxic environment in oxygen consumption, enzyme activities, and lipid concentration. Enzymes of B. cubensis from both sites were anaerobically poised with LDH activities exceeding those of CS in all organisms. But in the Yucatan B. cubensis, LDH activities exceeded MDH activities. Percent protein did not vary significantly between the two systems. Barbouria cubensis provided us with an opportunity to examine the process of cave colonization by looking at the metabolism of specimens in a dysoxic environment and those residing in oxic, surface pools.
Starting Page	303
Ending Page	310
Page Count	8
File Format	PDF
ISSN	18671616
Journal	Marine Biodiversity
Volume Number	42
Issue Number	3
e-ISSN	18671624
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stygobites Physiological adaptation Yucatan Peninsula Bahamas Cave habitat Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology Biodiversity
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography

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