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Metabolic Tolerance to Atmospheric Pressure of Two Freshwater Endemic Amphipods Mostly Inhabiting the Deep-Water Zone of the Ancient Lake Baikal.


ABSTRACT: Lake Baikal is the only freshwater reservoir inhabited by deep-water fauna, which originated mostly from shallow-water ancestors. Ommatogammarus flavus and O. albinus are endemic scavenger amphipods (Amphipoda, Crustacea) dwelling in wide depth ranges of the lake covering over 1300 m. O. flavus had been previously collected close to the surface, while O. albinus has never been found above the depth of 47 m. Since O. albinus is a promising model species for various research, here we tested whether O. albinus is less metabolically adapted to atmospheric pressure than O. flavus. We analyzed a number of energy-related traits (contents of glucose, glycogen and adenylates, as well as lactate dehydrogenase activity) and oxidative stress markers (activities of antioxidant enzymes and levels of lipid peroxidation products) after sampling from different depths and after both species' acclimation to atmospheric pressure. The analyses were repeated in two independent sampling campaigns. We found no consistent signs of metabolic disturbances or oxidative stress in both species right after lifting. Despite O. flavus surviving slightly better in laboratory conditions, during long-term acclimation, both species showed comparable reactions without critical changes. Thus, the obtained data favor using O. albinus along with O. flavus for physiological research under laboratory conditions.

SUBMITTER: Madyarova E 

PROVIDER: S-EPMC9325015 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Metabolic Tolerance to Atmospheric Pressure of Two Freshwater Endemic Amphipods Mostly Inhabiting the Deep-Water Zone of the Ancient Lake Baikal.

Madyarova Ekaterina E   Shirokova Yulia Y   Gurkov Anton A   Drozdova Polina P   Baduev Boris B   Lubyaga Yulia Y   Shatilina Zhanna Z   Vishnevskaya Maria M   Timofeyev Maxim M  

Insects 20220624 7


Lake Baikal is the only freshwater reservoir inhabited by deep-water fauna, which originated mostly from shallow-water ancestors. <i>Ommatogammarus flavus</i> and <i>O. albinus</i> are endemic scavenger amphipods (Amphipoda, Crustacea) dwelling in wide depth ranges of the lake covering over 1300 m. <i>O. flavus</i> had been previously collected close to the surface, while <i>O. albinus</i> has never been found above the depth of 47 m. Since <i>O. albinus</i> is a promising model species for vari  ...[more]

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