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Abnormal forms in t...
Abnormal forms in the brittle-star Amphipholis squamata: a field study
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- Dupont, Samuel, 1971 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology
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Mallefet, J. (author)
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(creator_code:org_t)
- 2002
- 2002
- English.
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In: Journal of the Marine Biological Association of the United Kingdom. - 0025-3154. ; 82:3, s. 491-493
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Abstract
Subject headings
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- Deviation from pentamerism is a rare phenomenon in 5-armed echinoderm species. Qualitative and quantitative data front field observations of 14 populations around the world were used for a biogeographical study of this phenomenon, Four abnormal forms presenting deviation from the classical pentamerism of echinoderms were observed within the brittle-star species Amphipholis squamata. (Echinodermata: Ophiuroidea). Although these forms were rare in global populations (0.29%), they call reach important frequencies in some locations. Our results suggest that habitat structure has all influence oil the occurence of abnormal forms. Moreover, deviations from pentamerism are not a heritable character but are a consequence of environmental perturbations oil the metamorphosis of larvae and/or abnormal regeneration of arms.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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