Induction of metamorphosis and its effect on the growth and survival of postmetamorphic juveniles of Chorus giganteus (Gastropoda: Muricidae)

Gallardo, Carlos S.; Sanchez, Karen Aguirre

doi:10.1016/s0044-8486(01)00611-1

Cited by 8 publications

(8 citation statements)

References 13 publications

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“…). Later studies on the same species produced slightly different results with 20 mM KCl inducing settlement and 30–40 mM being toxic (Gallardo & Sánchez ). Naegel et al .…”

Section: Discussionmentioning

confidence: 99%

“…), suitable settlement cues in the form of habitat (Davis ; Kingsley‐Smith et al . ), food for post‐metamorphic juveniles (Manríquez, Delgado, Jara & Castilla ), the origin of egg capsules (Gallardo & Sánchez ), turbulence (Pechenik & Gee ) and temperature (Przeslawski ). Any of these factors or a combination could have contributed to conditions provided throughout growth and development, or in settlement containers, being unsuitable for metamorphosis, thus resulting in mortality.…”

Section: Discussionmentioning

confidence: 99%

“…Larval density was then rechecked to ensure that larvae were at a density of 0.2 larvae mL −1 , which is a similar density to that used in the successful culture of other whelks (Di Salvo ; Nugranad et al . ; Chaitanawisuti & Kritsanapuntu ; Gallardo & Sánchez ).…”

Section: Methodsmentioning

confidence: 99%

“…Much of this research is aimed at the larval phase as mortality can be orders of magnitude higher at this stage than post settlement and metamorphosis (Pechenik ). Despite the obstacles of larval rearing, considerable success has been achieved in aquaculture of planktotrophic (Di Salvo ; Chaitanawisuti & Kritsanapuntu ), lecithotrophic (Gonzáles & Gallardo ; Gallardo & Sánchez ) and direct developing (Nugranad et al . ) whelk species.…”

Section: Introductionmentioning

confidence: 99%

“…The cues that induce larvae to begin this stage depend firstly on larvae being sufficiently developed to be competent for the change. A number of studies have used excess potassium ions to test for competency and induce settlement and metamorphosis in whelks (Ke, Li, Li, Zheng & Liu ; Gallardo & Sánchez ), including the planktotrophic muricid Concholepas concholepas Bruguière (Campos, Pinto, Bustos, Rodríguez & Inestrosa ). However, other cues such as the mucus of adult conspecifics, microalgal biofilms (Rodríguez, Riquelme, Campos, Chávez, Brandan & Inestrosa ) and adult prey (Avila ) may signal suitable habitat for larvae to settle and metamorphose.…”

Section: Introductionmentioning

confidence: 99%

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Growth, settlement and survival ofDicathais orbita(Neogastropoda, Mollusca) larvae in response to temperature, diet and settlement cues

2013

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The southern Australian whelk, Dicathais orbita, is a potential candidate for aquaculture, as both seafood and for bioactive compound production. Larval rearing experiments to determine the effects of temperature and diet on the growth and survival of D. orbita larvae under laboratory conditions comprised five different unicellular algal diets of two brown algal species; Isochysis galbana and Chaetoceros muelleri, two green algae; Tetraselmis seucica and Nannochloropsis oculata, and a mixture of all four strains for larvae maintained at 16 and 22°C. Absolute growth, specific growth rate (SGR) and survival were determined regularly. Larvae reared at 22°C on a mixed diet, or brown algae, performed significantly better than those reared on green algal diets alone. Preliminary trials with settlement cues were undertaken on different aged larvae to determine when larvae become competent. An array of natural cues (carrion, Xenostrobus pulex, adult mucus and Ulvella lens), as well as concentrations of KCl was tested. KCl(concentration of 20 mM) induced the greatest settlement, however, no larvae metamorphosed under the conditions provided. This study confirms long-lived planktotrophic larval development for Dicathais orbita with higher development rates at the higher water temperatures. Further studies will optimize culture conditions and cues for settlement and metamorphosis.

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“…). Later studies on the same species produced slightly different results with 20 mM KCl inducing settlement and 30–40 mM being toxic (Gallardo & Sánchez ). Naegel et al .…”

Section: Discussionmentioning

confidence: 99%