Sula Sgeir Gannet Harvest Policy Simulator

Hebridean Guga Tradition vs. Seabird Conservation Trade-offs
Policy Presets:
20-Year Colony Population Dynamics
Cap: 20,000 Pairs
20-Yr Colony Status
16,400
-8.8% from initial
Conservation Index
78 / 100
Ecological Safety
Cultural Heritage
85 / 100
Ness Trust Score
Decline Peak Year
2028
Lowest Point
Sula Sgeir Spatial Micro-Map
Interactive Nest Zones
Policy Compromise Briefing & Regulatory Trade-offs

Ecological Impact Assessment

With a harvest quota of 2,000 chicks/yr under moderate flu mortality (5%), the Sula Sgeir breeding colony exhibits resilient dynamics, settling near 16,400 breeding pairs. Natural recruitment buffers harvest losses unless climate-driven food stress exceeds 1.35x.

Socio-Political & Heritage Synthesis

Maintaining a traditional Ness Guga harvest preserves centuries of Hebridean maritime heritage (Cultural Continuity Score: 85/100). However, political tension with Scottish conservation agencies remains moderate without co-management agreements.

The wildlife scenario uses a harvest cap and assigned recruitment terms

Read the explanation

The source modeled harvest is the smaller of produced chicks times point eight and entered quota. Hypothetical production one thousand with quota six hundred gives six hundred; quota one thousand gives eight hundred. Bars share point five five pixels per modeled chick. This is simulator arithmetic, not permission, actual wildlife abundance or a scientifically validated harvest policy. The source remaining chicks are produced chicks minus modeled harvest, floored at zero. Hypothetical production one thousand and harvest six hundred leave four hundred; harvest eight hundred leaves two hundred. Bars share one point one pixels per modeled chick. Real survival, conservation and source claims are unverified; this count is only one stage of the programmed population update. The source recruits are remaining chicks times point two five times the larger of point one and density factor plus point five. At hypothetical density factor point five, the multiplier is one; four hundred chicks give one hundred recruits and two hundred give fifty. Bars share four point four pixels per modeled recruit. These parameters are not calibrated ecological estimates or policy recommendations. Full JSON/reset and native responsive earliest-promotion checks preserve the original tool.

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