Quantifying sea urchins covering behavior by image analysis

Emily J S Claereboudt, Michel R. Claereboudt

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Many sea urchin species collect debris on their aboral surface, a behavior collectively described as "covering behavior". In the Sultanate of Oman, the flower sea urchin, Toxopneustes pileolus, systematically shows this behavior, accumulating pieces of dead coral, pebbles, and fragments of various mollusks shells on its test. We compared the amount, size distribution, and relative volumetric mass of the covering material in three T pileolus populations using both underwater image analysis and physical analysis of collected debris. The underwater photographic method to estimate test cover was a good predictor of the actual amount of debris on the test (R2 = 0.85). Thxopneustes pileolus, preferred covering itself with the largest pieces of debris available in the surface sediment, but did not select pieces according to relative density. There were no significant differences in percentage cover neither among urchins of different diameters nor among urchins collected in different populations. We discuss these results in relation to various advanced hypothesis on the function of the covering behavior.

Original languageEnglish
Pages (from-to)587-592
Number of pages6
JournalCahiers de Biologie Marine
Volume54
Issue number4
Publication statusPublished - 2013

Fingerprint

Echinoidea
image analysis
physical analysis
shell (molluscs)
Oman
testing
pebble
molluscs
corals
coral
flower
shell
flowers
sediments
sea
sediment
test
methodology

Keywords

  • Covering behavior
  • Image analysis
  • Method
  • Toxopneustes
  • Urchin

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Quantifying sea urchins covering behavior by image analysis. / Claereboudt, Emily J S; Claereboudt, Michel R.

In: Cahiers de Biologie Marine, Vol. 54, No. 4, 2013, p. 587-592.

Research output: Contribution to journalArticle

@article{fd589516c025426ca243480796dce0a5,
title = "Quantifying sea urchins covering behavior by image analysis",
abstract = "Many sea urchin species collect debris on their aboral surface, a behavior collectively described as {"}covering behavior{"}. In the Sultanate of Oman, the flower sea urchin, Toxopneustes pileolus, systematically shows this behavior, accumulating pieces of dead coral, pebbles, and fragments of various mollusks shells on its test. We compared the amount, size distribution, and relative volumetric mass of the covering material in three T pileolus populations using both underwater image analysis and physical analysis of collected debris. The underwater photographic method to estimate test cover was a good predictor of the actual amount of debris on the test (R2 = 0.85). Thxopneustes pileolus, preferred covering itself with the largest pieces of debris available in the surface sediment, but did not select pieces according to relative density. There were no significant differences in percentage cover neither among urchins of different diameters nor among urchins collected in different populations. We discuss these results in relation to various advanced hypothesis on the function of the covering behavior.",
keywords = "Covering behavior, Image analysis, Method, Toxopneustes, Urchin",
author = "Claereboudt, {Emily J S} and Claereboudt, {Michel R.}",
year = "2013",
language = "English",
volume = "54",
pages = "587--592",
journal = "Cahiers de Biologie Marine",
issn = "0007-9723",
publisher = "Station Biologique de Roscoff",
number = "4",

}

TY - JOUR

T1 - Quantifying sea urchins covering behavior by image analysis

AU - Claereboudt, Emily J S

AU - Claereboudt, Michel R.

PY - 2013

Y1 - 2013

N2 - Many sea urchin species collect debris on their aboral surface, a behavior collectively described as "covering behavior". In the Sultanate of Oman, the flower sea urchin, Toxopneustes pileolus, systematically shows this behavior, accumulating pieces of dead coral, pebbles, and fragments of various mollusks shells on its test. We compared the amount, size distribution, and relative volumetric mass of the covering material in three T pileolus populations using both underwater image analysis and physical analysis of collected debris. The underwater photographic method to estimate test cover was a good predictor of the actual amount of debris on the test (R2 = 0.85). Thxopneustes pileolus, preferred covering itself with the largest pieces of debris available in the surface sediment, but did not select pieces according to relative density. There were no significant differences in percentage cover neither among urchins of different diameters nor among urchins collected in different populations. We discuss these results in relation to various advanced hypothesis on the function of the covering behavior.

AB - Many sea urchin species collect debris on their aboral surface, a behavior collectively described as "covering behavior". In the Sultanate of Oman, the flower sea urchin, Toxopneustes pileolus, systematically shows this behavior, accumulating pieces of dead coral, pebbles, and fragments of various mollusks shells on its test. We compared the amount, size distribution, and relative volumetric mass of the covering material in three T pileolus populations using both underwater image analysis and physical analysis of collected debris. The underwater photographic method to estimate test cover was a good predictor of the actual amount of debris on the test (R2 = 0.85). Thxopneustes pileolus, preferred covering itself with the largest pieces of debris available in the surface sediment, but did not select pieces according to relative density. There were no significant differences in percentage cover neither among urchins of different diameters nor among urchins collected in different populations. We discuss these results in relation to various advanced hypothesis on the function of the covering behavior.

KW - Covering behavior

KW - Image analysis

KW - Method

KW - Toxopneustes

KW - Urchin

UR - http://www.scopus.com/inward/record.url?scp=84888223457&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84888223457&partnerID=8YFLogxK

M3 - Article

VL - 54

SP - 587

EP - 592

JO - Cahiers de Biologie Marine

JF - Cahiers de Biologie Marine

SN - 0007-9723

IS - 4

ER -