Delayed metamorphosis in decapod crustaceans: evidence and consequences

Most marine invertebrate species exhibit a complex life cycle including a planktonic larval phase and a benthic juvenile-adult phase. Metamorphosis and settlement are the links between these phases of development. In many species, metamorphosis is triggered by specific chemical and/or physical cues,...

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Autores principales:	GEBAUER,PAULINA, PASCHKE,KURT, ANGER,KLAUS
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2003
Materias:	delayed metamorphosis Crustacea larvae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200004
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spelling	oai:scielo:S0716-078X20030002000042003-10-09Delayed metamorphosis in decapod crustaceans: evidence and consequencesGEBAUER,PAULINAPASCHKE,KURTANGER,KLAUS delayed metamorphosis Crustacea larvae Most marine invertebrate species exhibit a complex life cycle including a planktonic larval phase and a benthic juvenile-adult phase. Metamorphosis and settlement are the links between these phases of development. In many species, metamorphosis is triggered by specific chemical and/or physical cues, mainly associated with the adult habitat. In the absence of such cues, competent larvae can delay their metamorphosis by a few days to several months. Most investigations on the delay of metamorphosis have been realised on sessile or sedentary species. In relation to mobile decapod crustaceans, the number of such studies is low, probably because the members of this group retain their mobility after metamorphosis, and hence, may depend less on enviromental cues for the induction of settlement and metamorphosis. Nevertheless, the larvae of some decapod species have been shown to depend on metamorphosis-stimulating cues. These include special types of substrates, physical or chemical traits of particular (e.g., estuarine) water bodies, as well as odors from conspecific or congeneric adults. The capacity for delay is, in the decapod species studied so far, limited and may normally end with spontaneous metamorphosis. An extended time of larval development presents the advantage of enhancing the probability for locating a suitable habitat, but it may imply, as a disadvantage, a reduction of juvenile growth or survival and a prolonged development time preceding benthic life. This paper reviews the available evidence for delayed metamorphosis in decapod crustaceans, indentifed cues, the importance of larval age at the time of contact with a cue, and costs of delayed metamorphosis. Additionally, we propose new frontiers for future investigations on delayed metamorphosis in decapod crustaceans, including the molecular identification of chemical cues, the identification of the stage(s) of the moulting cycle that is or are sensitive to such cues, the study of hormonally mediated effects on the moulting cycle, the quantification of energetic or other costs of delayed metamorphosis, and the analysis of relationships between the effectiveness of adult odors and phylogenetic proximity of larvae and adultsinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.76 n.2 20032003-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200004en10.4067/S0716-078X2003000200004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	delayed metamorphosis Crustacea larvae
spellingShingle	delayed metamorphosis Crustacea larvae GEBAUER,PAULINA PASCHKE,KURT ANGER,KLAUS Delayed metamorphosis in decapod crustaceans: evidence and consequences
description	Most marine invertebrate species exhibit a complex life cycle including a planktonic larval phase and a benthic juvenile-adult phase. Metamorphosis and settlement are the links between these phases of development. In many species, metamorphosis is triggered by specific chemical and/or physical cues, mainly associated with the adult habitat. In the absence of such cues, competent larvae can delay their metamorphosis by a few days to several months. Most investigations on the delay of metamorphosis have been realised on sessile or sedentary species. In relation to mobile decapod crustaceans, the number of such studies is low, probably because the members of this group retain their mobility after metamorphosis, and hence, may depend less on enviromental cues for the induction of settlement and metamorphosis. Nevertheless, the larvae of some decapod species have been shown to depend on metamorphosis-stimulating cues. These include special types of substrates, physical or chemical traits of particular (e.g., estuarine) water bodies, as well as odors from conspecific or congeneric adults. The capacity for delay is, in the decapod species studied so far, limited and may normally end with spontaneous metamorphosis. An extended time of larval development presents the advantage of enhancing the probability for locating a suitable habitat, but it may imply, as a disadvantage, a reduction of juvenile growth or survival and a prolonged development time preceding benthic life. This paper reviews the available evidence for delayed metamorphosis in decapod crustaceans, indentifed cues, the importance of larval age at the time of contact with a cue, and costs of delayed metamorphosis. Additionally, we propose new frontiers for future investigations on delayed metamorphosis in decapod crustaceans, including the molecular identification of chemical cues, the identification of the stage(s) of the moulting cycle that is or are sensitive to such cues, the study of hormonally mediated effects on the moulting cycle, the quantification of energetic or other costs of delayed metamorphosis, and the analysis of relationships between the effectiveness of adult odors and phylogenetic proximity of larvae and adults
author	GEBAUER,PAULINA PASCHKE,KURT ANGER,KLAUS
author_facet	GEBAUER,PAULINA PASCHKE,KURT ANGER,KLAUS
author_sort	GEBAUER,PAULINA
title	Delayed metamorphosis in decapod crustaceans: evidence and consequences
title_short	Delayed metamorphosis in decapod crustaceans: evidence and consequences
title_full	Delayed metamorphosis in decapod crustaceans: evidence and consequences
title_fullStr	Delayed metamorphosis in decapod crustaceans: evidence and consequences
title_full_unstemmed	Delayed metamorphosis in decapod crustaceans: evidence and consequences
title_sort	delayed metamorphosis in decapod crustaceans: evidence and consequences
publisher	Sociedad de Biología de Chile
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200004
work_keys_str_mv	AT gebauerpaulina delayedmetamorphosisindecapodcrustaceansevidenceandconsequences AT paschkekurt delayedmetamorphosisindecapodcrustaceansevidenceandconsequences AT angerklaus delayedmetamorphosisindecapodcrustaceansevidenceandconsequences
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Delayed metamorphosis in decapod crustaceans: evidence and consequences

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