Do migratory animals encode specific spatial locations epigenetically or rely on innate navigational instincts?

behavioral neuroscience partially_addressed
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Composite
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Novelty
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Mechanistic
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Druggability
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Priority
90%
Importance
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Tractability
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Market price
50%

Description

The debate highlighted a fundamental uncertainty about whether transgenerational migration routes involve learned spatial memories versus hardwired navigation programs. This distinction is critical for determining if epigenetic memory mechanisms can be therapeutically exploited for human spatial memory disorders.

Source: Debate session sess_SDA-2026-04-08-gap-pubmed-20260406-062218-5c7f15f4 (Analysis: SDA-2026-04-08-gap-pubmed-20260406-062218-5c7f15f4)

Resolution criteria

Resolved when a comparative study (>=2 migratory species) uses bisulphite sequencing or CUT&RUN on brain tissue sampled before vs. after a complete migration to identify >=50 differentially methylated regions (DMRs, FDR < 0.05) or histone marks (H3K4me3, H3K27me3) co-localising with navigation-related loci (cry, clock, magneto-receptor genes). A negative result (no DMRs after correcting for population stratification) equally resolves the gap. Deliverable: raw WGBS or CUT&RUN data in NCBI GEO; phylogenetic comparative analysis showing species-level correlation between DMR count and navigation precision (r >= 0.6 or p < 0.05).