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Plankton studies in a mangrove environment: V. salinity tolerances of some planktonic crustaceans

Abstracts

The salinity tolerances of adult females of some relevant species of planktonic copepods were studies in a mangrove region of the estuarine type, at 25º south latitude. Results showed a wide range in the salinity tolerances for the adultfemales of all the species studied. Based on these experiments the following order of salinity tolerance can be proposed: Pseudodiaptomus acutus > Euterpina acutifrons > Acartia lilljeborgi > Oithona ovalis > Centropages furcatus > Temora stylifera. A mechanism for the maintenance of Pseudodiaptomus acutus at certain regions of the area studied is proposed, based on experimental and field results. It seems probable, thus that salinity is an important factor in the distribution of some members of the zooplankton in this region.


A tolerância à salinidade e temperatura de seis espécies de copépodos planctônicos (fêmeas adultas) foi estudada na região lagunar de Cananéia, a 25º latitute sul. Os resultados demonstraram que a tolerância à salinidade das espécies estudadas, apresenta grandes variações. Com base nesses experimentos, a seguinte ordem de tolerância à salinidade (em temperatura próxima à do campo ± 1ºC) pode ser dada para as espécies estudadas: Pseudodiaptomus acutus > Euterpina acutifrons > Acartia lilljeborgi > Oithona ovalis > Centropages furcatus > Temora stylifera. Um mecanismo para a manutenção de Pseudodiaptomus acutus em certas regiões da área estudada é proposto, baseado nas respostas à luz e diferentes salinidades.


Plankton studies in a mangrove environment: V. salinity tolerances of some planktonic crustaceans

J. Tundisi; T. M. Tundisi

Instituto Oceanográfico da Universidade de São Paulo

SYNOPSIS

The salinity tolerances of adult females of some relevant species of planktonic copepods were studies in a mangrove region of the estuarine type, at 25º south latitude. Results showed a wide range in the salinity tolerances for the adultfemales of all the species studied. Based on these experiments the following order of salinity tolerance can be proposed:

Pseudodiaptomus acutus > Euterpina acutifrons > Acartia lilljeborgi > Oithona ovalis > Centropages furcatus > Temora stylifera.

A mechanism for the maintenance of Pseudodiaptomus acutus at certain regions of the area studied is proposed, based on experimental and field results.

It seems probable, thus that salinity is an important factor in the distribution of some members of the zooplankton in this region.

RESUMO

A tolerância à salinidade e temperatura de seis espécies de copépodos planctônicos (fêmeas adultas) foi estudada na região lagunar de Cananéia, a 25º latitute sul.

Os resultados demonstraram que a tolerância à salinidade das espécies estudadas, apresenta grandes variações.

Com base nesses experimentos, a seguinte ordem de tolerância à salinidade (em temperatura próxima à do campo ± 1ºC) pode ser dada para as espécies estudadas:

Pseudodiaptomus acutus > Euterpina acutifrons > Acartia lilljeborgi > Oithona ovalis > Centropages furcatus > Temora stylifera.

Um mecanismo para a manutenção de Pseudodiaptomus acutus em certas regiões da área estudada é proposto, baseado nas respostas à luz e diferentes salinidades.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

(Received 13/8/1968)

Publ. n.º 257 do Inst. Ocean. da USP.

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Publication Dates

  • Publication in this collection
    14 June 2012
  • Date of issue
    1968

History

  • Received
    13 Aug 1968
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