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      Larval export strategy as an indication of ontogenetic migrations towards open sea of the fiddler crab Leptuca leptodactyla (Rathbun, in Rankin, 1898) (Crustacea, Ocypodidae) from Guaratuba Bay, southern Brazil

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          Abstract

          Abstract The influence of salinity on the survival of the larvae of Leptuca leptodactyla (Rathbun, in Rankin, 1898) from zoea (Z) to megalopa (M) stage was analyzed in order to deduce the larval dispersal strategy of the species. Larvae were obtained from 10 ovigerous females captured in the mangrove of Guaratuba Bay, southern Brazil. Five salinity treatments were conducted from 0 to 35 PSU (S0, S5, S15, S25 and S35). The larvae were individually raised in plastic cell culture plates, totaling 120 experimental units per treatment, kept under natural photoperiod (12:12 h) and water constant temperature (26.3 ± 0.82°C), and fed with microalgae, rotifers and Artemia nauplii. While all larvae died at S0, S5 and S15, complete larval development until the M stage was only observed at S25 and S35. The highest survival rate was recorded at S35 (18 M from 120 newly-hatched Z, survivorship 15%) and the lowest at S25 (2 M, 1.66%). No significant difference in the total duration was observed between S25 (28.5 ± 0.70 days) and S35 (23.61 ± 3.05 days). The life cycle of L. leptodactyla is based on a larval exportation strategy as they need to perform ontogenetic migrations to the coastal area.

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          Most cited references 54

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          Larval Transport on the Atlantic Continental Shelf of North America: a Review

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            Contributions of larval biology to crustacean research: a review

             KLAUS ANGER (2006)
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              Estuarine retention of larvae of the crab Rhithropanopeus harrisii

               Thomas Cronin (1982)
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                Author and article information

                Journal
                nau
                Nauplius
                Nauplius
                Sociedade Brasileira de Carcinologia (Botucatu, SP, Brazil )
                2358-2936
                2020
                : 28
                Affiliations
                Curitiba Paraná orgnameFederal University of Paraná orgdiv1Department of Zoology orgdiv2Laboratory for Crustacean Research Brazil
                Pontal do Paraná Paraná orgnameFederal University of Paraná orgdiv1Department of Animal Husbandry orgdiv2Center of Marine Aquaculture and Stock Enhancement Brazil
                Article
                S0104-64972020000100226 S0104-6497(20)02800000226
                10.1590/2358-2936e2020028

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 66, Pages: 0
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                Original Article

                larval survival, Larval dispersal, salinity treatment

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