Avian BMR in Marine and Non-Marine Habitats: A Test Using Shorebirds

Marine

Non-marine

BMR

Basal Metabolic Rate

MR BThe minimum rate of energy

expenditure of normothermic homeotherms under thermoneutral and post-absorptive conditions in the inactive phase of the circadian cycle

Migratory shorebird(Charadriiformes 鴴目 )

Divided into broad categories (coastal & inland) in terms of their habitat occupancy outside the breeding season.

Interspecific analysis→Variation in BMR attributed to genotypic divergence.

Intraspecific analysis→ Inland habitats < Marine habitats (15%)→ Phenotypic plasticity

Results

Discussion

• Tidally-induced food restrictions• High salinity• Windy microclimates associated with

coastal saline habitats

BMR↑ (For Marine species)

Eliminate phenotypic plasticity as a source of phenotypic variation.

Common-garden experiments

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