The Effectiveness of the Protection of Embryos and Larvae within Egg Masses of the Gastropod Epheria turritaagainst Changes in Salinity and Desiccation

The Effectiveness of the Protection of Embryos and Larvae within Egg Masses of the Gastropod... The effectiveness of the protection of embryos and larvae in egg masses from reduced salinity and desiccation was investigated in the gastropod Epheria turrita, which inhabits the intertidal and upper subtidal zones. Embryos and larvae developing inside egg masses were shown not to be protected against changes in environmental salinity. Viable larvae hatched from egg masses at a salinity of 24–26‰. However, if free-swimming veliger larvae, rather than egg masses, were transferred to water of reduced salinity, the range of salinity tolerated by the larvae was wider, and its lower limit was 18–20‰. Egg masses did not protect against desiccation either. A 3-h exposure of egg masses to drying resulted in larval mortality. Larvae hatched from egg masses did not rise to the surface and displayed an early tendency towards gregarious behavior, which apparently enhances their ability to settle on a proper substrate near parental populations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

The Effectiveness of the Protection of Embryos and Larvae within Egg Masses of the Gastropod Epheria turritaagainst Changes in Salinity and Desiccation

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1023/A:1018825621220
Publisher site
See Article on Publisher Site

Abstract

The effectiveness of the protection of embryos and larvae in egg masses from reduced salinity and desiccation was investigated in the gastropod Epheria turrita, which inhabits the intertidal and upper subtidal zones. Embryos and larvae developing inside egg masses were shown not to be protected against changes in environmental salinity. Viable larvae hatched from egg masses at a salinity of 24–26‰. However, if free-swimming veliger larvae, rather than egg masses, were transferred to water of reduced salinity, the range of salinity tolerated by the larvae was wider, and its lower limit was 18–20‰. Egg masses did not protect against desiccation either. A 3-h exposure of egg masses to drying resulted in larval mortality. Larvae hatched from egg masses did not rise to the surface and displayed an early tendency towards gregarious behavior, which apparently enhances their ability to settle on a proper substrate near parental populations.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Oct 16, 2004

References

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