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Equation 1 · Part 2 · Evolutionary Biology and Ecology in Practice: An Advanced Technical Guide

subscript

n1n_1
subscript

What this part means

The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.

Its job in the formula

A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.

The passage around this formula

The naive population estimate — mark n1n_1 animals, recapture a sample of n2n_2 later, count how many are marked, and scale up — assumes every individual in the population has the same probability of being caught in every session. That assumption is false in essentially every real population: some individuals are trap-shy, some trap-happy, capture probability drifts with weather and observer effort, and animals die or emigrate between sessions. Treating the naive ratio as ground truth silently launders all of that heterogeneity into the population estimate.

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

Open the illustrated subscripts: which member of a family? guide →

Sources cited in the article section

These citations provide research context; check each source for the exact claim it supports.