Repository logo
 
Publication

Egg release and settlement patterns of dioecious and hermaphroditic fucoid algae during the tidal cycle

2008-11Journal article Restricted access
Simple item page
dc.contributor.authorLadah, Lydia
dc.contributor.authorFeddersen, F.
dc.contributor.authorPearson, G. A.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-06-05T11:08:59Z
dc.date.available2014-06-05T11:08:59Z
dc.date.issued2008-11
dc.date.updated2014-05-21T13:32:47Z
dc.description.abstractThe timing of gamete release by fucoid algae, although known to be restricted to calm days is not clearly understood within a circadian time scale. The need for externally fertilizing species to avoid gamete dilution suggests that in wave-exposed areas spawning may occur during particular tidal phases. However, this may differ between mating systems, as selfing species may be less affected by gamete dilution. In this study, two different approaches were used to determine when egg release occurs during the tidal cycle in two sister species with different mating systems. First, egg settlement of Fucus vesiculosus (dioecious) and Fucus spiralis (selfing hermaphrodite) was quantified on removable substrates (egg settlement disks) every day for 2 months and settlement patterns were used to statistically estimate the radius of a circle that would encompass 99% of each patch of settled eggs (the egg dispersal radius). Also, egg release was quantified every 2 h during the tidal cycle. A significantly larger egg dispersal radius (P < 0.02) was found for F. spiralis than F. vesiculosus, and this difference was somewhat site dependent with a greater difference between species in exposed sites. The egg dispersal radius was negatively correlated with significant wave height and positively correlated with sea surface temperature for both the species (P < 0.05), with a greater effect of both the factors for F. spiralis than for F. vesiculosus. Egg release during the tidal cycle was variable between species and experiments, with F. vesiculosus releasing more eggs, later in the day, and at a lower tide, than F. spiralis, which released fewer eggs, throughout the day and at all tides. The dioecious species, F. vesiculosus, may have developed a specific adaptation for timing the egg release to periods when emersed in exposed habitats to avoid rapid dilution of gametes that require outcrossing for fertilization. On the other hand, egg release for F. spiralis, which can self-fertilize, occurred both when emersed and immersed, suggesting this species has developed less synchrony with specific environmental factors. Site dependence also suggests local wave conditions can modulate timing of release. The data are consistent with the relaxation of the selective constraints of water motion on fertilization success in a selfing hermaphrodite, relative to an obligate outcrossing species. Results support the idea that species with different mating systems evolve different sensitivities to environmental cues for gamete release with specific implications for inbreeding and successful external fertilization in the ocean.por
dc.identifier.citationLadah, L.B.; Feddersen, F.; Pearson, G.A.; Serrão, E.A.Egg release and settlement patterns of dioecious and hermaphroditic fucoid algae during the tidal cycle, Marine Biology, 155, 6, 583-591, 2008.por
dc.identifier.doihttp://dx.doi.org/ 10.1007/s00227-008-1054-4
dc.identifier.issn0025-3162
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4192
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringer Verlagpor
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs00227-008-1054-4por
dc.subjectEgg releasepor
dc.subjectHermaphroditic fucoid algaepor
dc.titleEgg release and settlement patterns of dioecious and hermaphroditic fucoid algae during the tidal cyclepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage591por
oaire.citation.issue6por
oaire.citation.startPage583por
oaire.citation.titleMarine Biologypor
oaire.citation.volume155por
person.familyNameLadah
person.familyNamePearson
person.familyNameSerrao
person.givenNameLydia
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id4B16-1B2C-1B7D
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-4009-4817
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id6507245595
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication4628a13a-7372-47d4-8405-41d93cf3cf17
relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery0a10c448-c7f5-4c3b-9488-3917c707e35e

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Egg release and settlement patterns of a dioecious and hermaphrodite fucoid algae during the tidal cycle.pdf
Size:
335.92 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CCM2-Artigos (em revistas ou actas indexadas)