Assessment of the physiological performance of the invasive oriental shrimp Palaemon macrodactylus from an atypical marine population.

Maraschi, Anieli; Asaro, Antonela; Bas, Claudia Cristina; Ituarte, Romina Belén

Maraschi, Anieli; Asaro, Antonela; Bas, Claudia Cristina; Ituarte, Romina Belén.

Afiliação

Maraschi A; Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil.
Asaro A; Departamento de Biología, Grupo Zoología Invertebrados, Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata, Argentina.
Bas CC; Departamento de Biología, Grupo Zoología Invertebrados, Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata, Argentina.
Ituarte RB; Departamento de Biología, Grupo Zoología Invertebrados, Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Mar del Plata, Argentina.

J Exp Zool A Ecol Integr Physiol ; 341(8): 885-895, 2024 Oct.

Article em En | MEDLINE | ID: mdl-38934391

ABSTRACT

ABSTRACT

Since 2000, a well-established population of the invasive oriental shrimp Palaemon macrodactylus has been present in fully marine conditions in the southwestern Atlantic Ocean (~38° S). To assess the physiological performance of this atypical population restricted to fully marine conditions, we conducted a laboratory experiment in which individuals were transferred from 35 S (local seawater) to 2 S; 5 S; 10 S; 20 S; 50 S and 60 for short (6 h), medium (48 h), and long (>504 h) acclimation periods. We measured the time course response of relevant parameters in the shrimp's hemolymph; activity of Na+, K+-ATPase (NKA), and V-H+-ATPase (VHA); and muscle water content. Shrimp showed great osmoregulatory plasticity, being able to survive for long periods between 5 S and 50 S, whereas no individual survived after transfer to either 2 S or 60 S. Shrimp hyper-regulated hemolymph osmolality at 5 S and 10 S, hypo-regulated at 35 S and 50 S, and isosmoticity was close to 20 S. Compared to 35 S, prolonged acclimation to 5 S caused a decrease in hemolymph osmolality (~34%) along with sodium and chloride concentrations (~24%); the NKA and VHA activities decreased by ~52% and ~88%, respectively, while muscle water content was tightly regulated. Our results showed that the atypical population of P. macrodactylus studied here lives in a chronic hypo-osmo-ion regulatory state and suggest that fully marine conditions contribute to its poor performance at the lower limit of salinity tolerance (<5 S).

Assuntos

Palaemonidae; Animais; Palaemonidae/fisiologia; Salinidade; Espécies Introduzidas; Hemolinfa/química; Aclimatação/fisiologia; Água do Mar/química

Palavras-chave

(V)type H+ATPase; Na+, K+ATPase; invasive shrimp; ionic regulation; osmoregulation; salinity tolerance

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Palaemonidae Limite: Animals Idioma: En Revista: J Exp Zool A Ecol Integr Physiol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

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