Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities
Survival of incipient non-indigenous populations is dramatically altered by early predation on new colonisers. These effects can be influenced by morphological traits, such as coloniser size and density. The Australian non-native Pacific Oyster Crassostrea gigas is generally more fecund and faster g...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3963846 http://www.ncbi.nlm.nih.gov/pubmed/24663029 https://doi.org/10.1371/journal.pone.0090621 |
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ftpubmed:oai:pubmedcentral.nih.gov:3963846 2023-05-15T15:58:01+02:00 Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities Hedge, Luke H. Johnston, Emma L. 2014-03-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3963846 http://www.ncbi.nlm.nih.gov/pubmed/24663029 https://doi.org/10.1371/journal.pone.0090621 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3963846 http://www.ncbi.nlm.nih.gov/pubmed/24663029 http://dx.doi.org/10.1371/journal.pone.0090621 This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2014 ftpubmed https://doi.org/10.1371/journal.pone.0090621 2014-03-30T01:46:28Z Survival of incipient non-indigenous populations is dramatically altered by early predation on new colonisers. These effects can be influenced by morphological traits, such as coloniser size and density. The Australian non-native Pacific Oyster Crassostrea gigas is generally more fecund and faster growing compared to the native Saccostrea glomerata found in the same habitat. It is therefore important to quantify how the two species differ in survival across coloniser density and predation gradients. This information could become pertinent to the management of wild and aquaculture populations of the non-native C. gigas. Using a field-based factorial experiment we model the survival of incipient populations of both the native S. glomerata and the non-indigenous C. gigas as a function of coloniser density, predator reduction and individual size. Unexpectedly, survival of the non-indigenous C. gigas increased compared to S. glomerata when individuals were larger. The proportional survival of newly colonised oyster populations also increased with larger initial populations, regardless of species identity. Further, predator reduction resulted in increased survival of both oyster species, irrespective of coloniser size or initial density. Here we quantitatively demonstrate the effects of recruit density and size on enhancing the survivability of incipient oyster populations. Text Crassostrea gigas Pacific oyster PubMed Central (PMC) Pacific PLoS ONE 9 3 e90621 |
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Research Article Hedge, Luke H. Johnston, Emma L. Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
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Research Article |
description |
Survival of incipient non-indigenous populations is dramatically altered by early predation on new colonisers. These effects can be influenced by morphological traits, such as coloniser size and density. The Australian non-native Pacific Oyster Crassostrea gigas is generally more fecund and faster growing compared to the native Saccostrea glomerata found in the same habitat. It is therefore important to quantify how the two species differ in survival across coloniser density and predation gradients. This information could become pertinent to the management of wild and aquaculture populations of the non-native C. gigas. Using a field-based factorial experiment we model the survival of incipient populations of both the native S. glomerata and the non-indigenous C. gigas as a function of coloniser density, predator reduction and individual size. Unexpectedly, survival of the non-indigenous C. gigas increased compared to S. glomerata when individuals were larger. The proportional survival of newly colonised oyster populations also increased with larger initial populations, regardless of species identity. Further, predator reduction resulted in increased survival of both oyster species, irrespective of coloniser size or initial density. Here we quantitatively demonstrate the effects of recruit density and size on enhancing the survivability of incipient oyster populations. |
format |
Text |
author |
Hedge, Luke H. Johnston, Emma L. |
author_facet |
Hedge, Luke H. Johnston, Emma L. |
author_sort |
Hedge, Luke H. |
title |
Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
title_short |
Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
title_full |
Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
title_fullStr |
Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
title_full_unstemmed |
Colonisation of the Non-Indigenous Pacific Oyster Crassostrea gigas Determined by Predation, Size and Initial Settlement Densities |
title_sort |
colonisation of the non-indigenous pacific oyster crassostrea gigas determined by predation, size and initial settlement densities |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3963846 http://www.ncbi.nlm.nih.gov/pubmed/24663029 https://doi.org/10.1371/journal.pone.0090621 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3963846 http://www.ncbi.nlm.nih.gov/pubmed/24663029 http://dx.doi.org/10.1371/journal.pone.0090621 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
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https://doi.org/10.1371/journal.pone.0090621 |
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PLoS ONE |
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9 |
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3 |
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e90621 |
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1766393739170807808 |