当前位置： SCI文献检索 > EUROPEAN JOURNAL OF PROTISTOLOGY期刊下所有文献 > Salinity tolerance in Hyalophysa chattoni (Ciliophora, Apostomatida), a symbiont of the estuarine grass shrimp Palaemonetes pugio.

Salinity tolerance in Hyalophysa chattoni (Ciliophora, Apostomatida), a symbiont of the estuarine grass shrimp Palaemonetes pugio.

Abstract：

:The apostome ciliate Hyalophysa chattoni, a symbiont of the estuarine grass shrimp Palaemonetes pugio, was tested for its growth and reproductive ability in a wide range of salinities from 0.1 to 55 ppt. Shrimp, with their attached ciliates, were slowly acclimated to different salinities in order to assess protozoan cell size and division. The trophont and tomont stages of the ciliate life cycle were analyzed. In both stages, cell size increased with salinity from 0.1 to 20 ppt. Cell size leveled in the 20-35 ppt range, and decreased at higher salinities. The number of daughter cells produced per tomont cyst correlated with increased cell size, and also correlated with increased salinity. Additionally, increased salinity correlated with an increase in the percentage of cells able to divide and excyst as tomite stages. These results indicate that H. chattoni is able to grow and divide more effectively at salinities closer to seawater than in the estuarine environment from which they were collected. Though able to survive salinities from 0.1 to 55 ppt, the species is better adapted for an existence in the higher salt concentrations.

journal_name

Eur J Protistol

journal_title

European journal of protistology

authors

Pisani KA,Landers SC,Pappanastos E

doi

10.1016/j.ejop.2007.11.002

subject

Has Abstract

pub_date

2008-05-01 00:00:00

pages

141-8

issue

2

eissn

0932-4739

issn

1618-0429

pii

S0932-4739(07)00071-5

journal_volume

44

pub_type

杂志文章

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