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Early development and larval survival of Psammechinus miliaris under deep-sea temperature and pressure conditions

Early development and larval survival of Psammechinus miliaris under deep-sea temperature and pressure conditions
Early development and larval survival of Psammechinus miliaris under deep-sea temperature and pressure conditions
The aim of this study was to analyse the tolerance of the planktonic stages of Psammechinus miliaris to hydrostatic pressure and temperature. Embryos of Psammechinus miliaris were subjected to different combinations of pressure and temperature for 3, 6 and 12 h. The percentage of embryos at each stage and the percentage of embryos developing abnormally were measured. Larvae at the gastrula and prism stages were subjected to pressure and temperature combinations for 24 h and the larval survival was calculated measuring the percentage of swimming larvae. Both embryos and larvae could survive at greater pressures than the known adult depth limits. Larvae showed a much greater potential than embryos for surviving deeper, with approximately 100% of both gastrulae and prisms surviving up to 200 atm at 5°C. These results are similar to other shallow-water species of Echinoida. Thus larval tolerance of high pressure and low temperature may have been important for the success of this group in colonizing the deep-sea.
0025-3154
453-461
Aquino-Souza, R.
5760f789-d324-496e-aaf9-87b8d1eafd13
Hawkins, S.J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Tyler, P.A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8
Aquino-Souza, R.
5760f789-d324-496e-aaf9-87b8d1eafd13
Hawkins, S.J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Tyler, P.A.
d1965388-38cc-4c1d-9217-d59dba4dd7f8

Aquino-Souza, R., Hawkins, S.J. and Tyler, P.A. (2008) Early development and larval survival of Psammechinus miliaris under deep-sea temperature and pressure conditions. Journal of the Marine Biological Association of the United Kingdom, 88 (3), 453-461. (doi:10.1017/S0025315408001148).

Record type: Article

Abstract

The aim of this study was to analyse the tolerance of the planktonic stages of Psammechinus miliaris to hydrostatic pressure and temperature. Embryos of Psammechinus miliaris were subjected to different combinations of pressure and temperature for 3, 6 and 12 h. The percentage of embryos at each stage and the percentage of embryos developing abnormally were measured. Larvae at the gastrula and prism stages were subjected to pressure and temperature combinations for 24 h and the larval survival was calculated measuring the percentage of swimming larvae. Both embryos and larvae could survive at greater pressures than the known adult depth limits. Larvae showed a much greater potential than embryos for surviving deeper, with approximately 100% of both gastrulae and prisms surviving up to 200 atm at 5°C. These results are similar to other shallow-water species of Echinoida. Thus larval tolerance of high pressure and low temperature may have been important for the success of this group in colonizing the deep-sea.

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Published date: May 2008

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Local EPrints ID: 52084
URI: https://eprints.soton.ac.uk/id/eprint/52084
ISSN: 0025-3154
PURE UUID: d014176d-0751-4bba-87e5-87dffb3cfb2a

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Date deposited: 18 Jun 2008
Last modified: 19 Jul 2019 18:44

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