Intraspecific morphological variation related to the moult‐cycle in colour forms of the shore crab Carcinus maenas

Iain J. McGaw, M. J. Kaiser, E. Naylor, Roger N. Hughes

Research output: Contribution to journalArticle

Abstract

The common shore crab Carcinus maenas exhibits a range of carapace colours from green through orange to red, green forms showing some differences of distribution from red/orange forms. To test the hypothesis that colour differences were moult‐related, large numbers of Carcinus were collected intertidally and subtidally in summer when moulting is most prevalent, and their moult stages determined. Red and orange coloration was found only to occur in the larger size classes in crabs in prolonged intermoult, but not solely in the largest crabs in terminal anecdysis. Red crabs were characterized by a heavier load of epibionts and a strong, thicker carapace. In contrast, green crabs were found over the entire size range and appeared to be actively moulting forms; they carried fewer epibionts and had a thinner integument than red forms. The significance of morphological differences between red/orange and green forms of Carcinus maenas is considered in relation to previously reported behavioural, physiological and ecological differences between the colour forms. 1992 The Zoological Society of London

Original languageEnglish
Pages (from-to)351-359
Number of pages9
JournalJournal of Zoology
Volume228
Issue number2
DOIs
Publication statusPublished - Oct 1992

Fingerprint

Carcinus maenas
crab
crabs
color
molting
Carcinus
molt
integument
range size
summer
testing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

@article{4d0e6c55ecb644178306b36d986d6d0d,
title = "Intraspecific morphological variation related to the moult‐cycle in colour forms of the shore crab Carcinus maenas",
abstract = "The common shore crab Carcinus maenas exhibits a range of carapace colours from green through orange to red, green forms showing some differences of distribution from red/orange forms. To test the hypothesis that colour differences were moult‐related, large numbers of Carcinus were collected intertidally and subtidally in summer when moulting is most prevalent, and their moult stages determined. Red and orange coloration was found only to occur in the larger size classes in crabs in prolonged intermoult, but not solely in the largest crabs in terminal anecdysis. Red crabs were characterized by a heavier load of epibionts and a strong, thicker carapace. In contrast, green crabs were found over the entire size range and appeared to be actively moulting forms; they carried fewer epibionts and had a thinner integument than red forms. The significance of morphological differences between red/orange and green forms of Carcinus maenas is considered in relation to previously reported behavioural, physiological and ecological differences between the colour forms. 1992 The Zoological Society of London",
author = "McGaw, {Iain J.} and Kaiser, {M. J.} and E. Naylor and Hughes, {Roger N.}",
year = "1992",
month = "10",
doi = "10.1111/j.1469-7998.1992.tb04614.x",
language = "English",
volume = "228",
pages = "351--359",
journal = "Journal of Zoology",
issn = "0952-8369",
publisher = "Wiley-Blackwell",
number = "2",

}

Intraspecific morphological variation related to the moult‐cycle in colour forms of the shore crab Carcinus maenas. / McGaw, Iain J.; Kaiser, M. J.; Naylor, E.; Hughes, Roger N.

In: Journal of Zoology, Vol. 228, No. 2, 10.1992, p. 351-359.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Intraspecific morphological variation related to the moult‐cycle in colour forms of the shore crab Carcinus maenas

AU - McGaw, Iain J.

AU - Kaiser, M. J.

AU - Naylor, E.

AU - Hughes, Roger N.

PY - 1992/10

Y1 - 1992/10

N2 - The common shore crab Carcinus maenas exhibits a range of carapace colours from green through orange to red, green forms showing some differences of distribution from red/orange forms. To test the hypothesis that colour differences were moult‐related, large numbers of Carcinus were collected intertidally and subtidally in summer when moulting is most prevalent, and their moult stages determined. Red and orange coloration was found only to occur in the larger size classes in crabs in prolonged intermoult, but not solely in the largest crabs in terminal anecdysis. Red crabs were characterized by a heavier load of epibionts and a strong, thicker carapace. In contrast, green crabs were found over the entire size range and appeared to be actively moulting forms; they carried fewer epibionts and had a thinner integument than red forms. The significance of morphological differences between red/orange and green forms of Carcinus maenas is considered in relation to previously reported behavioural, physiological and ecological differences between the colour forms. 1992 The Zoological Society of London

AB - The common shore crab Carcinus maenas exhibits a range of carapace colours from green through orange to red, green forms showing some differences of distribution from red/orange forms. To test the hypothesis that colour differences were moult‐related, large numbers of Carcinus were collected intertidally and subtidally in summer when moulting is most prevalent, and their moult stages determined. Red and orange coloration was found only to occur in the larger size classes in crabs in prolonged intermoult, but not solely in the largest crabs in terminal anecdysis. Red crabs were characterized by a heavier load of epibionts and a strong, thicker carapace. In contrast, green crabs were found over the entire size range and appeared to be actively moulting forms; they carried fewer epibionts and had a thinner integument than red forms. The significance of morphological differences between red/orange and green forms of Carcinus maenas is considered in relation to previously reported behavioural, physiological and ecological differences between the colour forms. 1992 The Zoological Society of London

UR - http://www.scopus.com/inward/record.url?scp=0027089545&partnerID=8YFLogxK

U2 - 10.1111/j.1469-7998.1992.tb04614.x

DO - 10.1111/j.1469-7998.1992.tb04614.x

M3 - Article

VL - 228

SP - 351

EP - 359

JO - Journal of Zoology

JF - Journal of Zoology

SN - 0952-8369

IS - 2

ER -