01 Leave the island
Post-breeding adults enter multi-month ocean loops.
Operating a albatross life is a loop: sense, decide, act, and stay inside an energy and legal envelope.
Steps are type-level -- hunt, migrate or spawn -- not a promise that every individual follows the same film sequence.
Principles
Energy in, work out
Squid, fish and fishery offal taken at the surface. Cheap travel, expensive landing — breeding islands are the rare pause.
Information before motion
Olfaction is stronger than in most birds; a surface slick can be smelled before it is seen. Magnetic and wind cues steer basin-scale loops.
Replacement rate
Slow breeders (whales, apes, albatrosses, tigers) cannot outrun a short political cycle. Fast clutch species still fail if the nest site vanishes.
Place is part of the phenotype
A albatross without its lake, ice, anemone or gravel is a different, usually failing, animal.
Human systems are now habitat
Quotas, feeders, reserves and films rewrite survival as much as weather. A hooked bait is an evolutionary mismatch. Mice on nursery islands and plastic in the gyre are the other two ceilings.
Diagrams
Albatross forage / hunt loop
Locatesense
Approachmove
Strikeact
Handlehandle
Feed younginvest
Disperseleave
Albatross life-cycle loop
Pairstart
Nestgrow
Incubatemove
Fledgelearn
Migratebreed
Returnend
Life-cycle steps
02 Climb the shear
Dynamic soaring extracts energy from wave-top wind gradients.
03 Take surface prey
Squid night-rise and discards pull birds onto hooks.
04 Return on a wind
Breeding adults commute thousands of kilometres between chick and forage.
05 One slow chick
Biennial breeding in great albatrosses — a low replacement rate.
06 Fledge into the gyre
Juveniles wander years before first return; Wisdom’s cohort shows how long that ledger runs.
Hard limits
Physiological envelope
A hooked bait is an evolutionary mismatch. Mice on nursery islands and plastic in the gyre are the other two ceilings.
Place dependence
Without the breeding site or forage pulse, brochure behaviour is theoretical.
Human and legal limits
Quotas, listings and trade rules now bound real populations as tightly as weather.
Keep exploring
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