L13_schoolingHO11

L13_schoolingHO11 - Schooling/Migration - 1 EEMB 106...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Schooling/Migration - 1 EEMB 106 – Lecture 13 – Schooling and migration I. Schooling A. Definitions 1. shoals : groups of fish remaining together for social reasons 2. schools : synchronized and polarized swimming groups B. How do fish school? cues: 1. visual 2. lateral line C. Structure of schools 1. shape depends on function 2. usually single species, but can be mixed species D. Function of schooling: what is the advantage to individuals of being in a school? 1.Hydrodynamic advantage: some theoretical advantage, new evidence in Karman gait 2. Avoiding predation a. Simple avoidance – requires that the predator has a narrow search field b. Dilution - simple reduction of the per capita probability of mortality c. Evasion - from swift cooperative behavior 1. When a predator finds a group of fish: a) shoal school b) subgroups to main group c) interindividual distances decrease d) movements synchronize e)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

L13_schoolingHO11 - Schooling/Migration - 1 EEMB 106...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online