Delayed metamorphosis in decapod crustaceans: evidence and consequences
By P. Gebauer, K. Paschke, K. Anger. 2003
88 citations recorded by the source corpus.
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 environmental 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.
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Citations in the corpus
- Induction of settlement in crab megalopae by ambient underwater reef sound (2010, background): “These cues can be both general and apply to many species, such as the specific chemical cues associated with conspecific adults (Uca pugilator, Uca pugnax, Pagurus maclaughlinae, Paguristes tortugae, Chasmagnathus granulata, Panopeus herbstii, and Sesarma curacaoence) (Gebauer et al. 2003) and speci”
- Contributions of larval biology to crustacean research: a review (2006, background): “…observed in various aquatic invertebrates with complex life histories, for instance for ascidians (Bennet and Marshall, 2005), bryozoans (Ng and Keough, 2003), molluscs (Phillips, 2004), barnacles (Thiyagarajan et al., 2005), and crabs (Giménez, 2004; Gebauer et al., 2003; Giménez et al., 2004).”
- The Ecology of Rafting in the Marine Environment. II. The Rafting Organisms and Community (2005, background): “If larvae reach new habitats outside their competent phase, they may not be capable to delay metamorphosis (e.g., Gebauer et al. 2003) and no successful settlement may occur.”