Moderate establishment success of Pacific oyster, Crassostrea gigas, on a sheltered intertidal mussel bed

Mark Wejlemann Holm, Jens Davids, Per Dolmer, Bent Vismann, Esbern Holmes, Thomas Theis Nielsen, Benni Winding Hansen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The Pacific oyster (Crassostrea gigas Thunberg 1793) is introduced into marine ecosystems worldwide. In Denmark, C. gigas was introduced into the micro tidal Limfjord, around 1972 for aquaculture. This study describes the population structure of C. gigas at Agger Tange in 2007, 2009, 2010 and 2011. Here, C. gigas use beds of Blue mussels (Mytilus edulis L.) as primary habitat. The mean abundance (± 1 SD) of C. gigas was unchanged during our study (45 ± 2 indv. m− 2), while it increased for M. edulis from 2010 to 2011 (934 ± 610 to 1434 ± 750 indv. m− 2, respectively). In 2009, a newly settled cohort of C. gigas was present, but in the succeeding years no or negligible recruitment was recorded. However, age cohort analyses, based on individual shell size at different ages, suggest successful recruitment in three out of seven years. A comparison with the course of the bioinvasion in List Tidal Basin, suggests that the population at Agger Tange is not in the expansion phase of the bioinvasion, despite of frequent settlement, high shell growth rates and relatively high abundance. So far, C. gigas has had moderate establishment success. We conclude that C. gigas is still in the establishment phase, but that this is prolonged, presumably due to low food availability
OriginalsprogEngelsk
TidsskriftJournal of Sea Research
Vol/bind104
Sider (fra-til)1-8
ISSN1385-1101
DOI
StatusUdgivet - 2015

Citer dette

@article{3957221b0643478096da9eecb4941f68,
title = "Moderate establishment success of Pacific oyster, Crassostrea gigas, on a sheltered intertidal mussel bed",
abstract = "The Pacific oyster (Crassostrea gigas Thunberg 1793) is introduced into marine ecosystems worldwide. In Denmark, C. gigas was introduced into the micro tidal Limfjord, around 1972 for aquaculture. This study describes the population structure of C. gigas at Agger Tange in 2007, 2009, 2010 and 2011. Here, C. gigas use beds of Blue mussels (Mytilus edulis L.) as primary habitat. The mean abundance (± 1 SD) of C. gigas was unchanged during our study (45 ± 2 indv. m− 2), while it increased for M. edulis from 2010 to 2011 (934 ± 610 to 1434 ± 750 indv. m− 2, respectively). In 2009, a newly settled cohort of C. gigas was present, but in the succeeding years no or negligible recruitment was recorded. However, age cohort analyses, based on individual shell size at different ages, suggest successful recruitment in three out of seven years. A comparison with the course of the bioinvasion in List Tidal Basin, suggests that the population at Agger Tange is not in the expansion phase of the bioinvasion, despite of frequent settlement, high shell growth rates and relatively high abundance. So far, C. gigas has had moderate establishment success. We conclude that C. gigas is still in the establishment phase, but that this is prolonged, presumably due to low food availability",
author = "Holm, {Mark Wejlemann} and Jens Davids and Per Dolmer and Bent Vismann and Esbern Holmes and Nielsen, {Thomas Theis} and Hansen, {Benni Winding}",
year = "2015",
doi = "10.1016/j.seares.2015.07.009",
language = "English",
volume = "104",
pages = "1--8",
journal = "Journal of Sea Research",
issn = "1385-1101",
publisher = "Elsevier BV",

}

Moderate establishment success of Pacific oyster, Crassostrea gigas, on a sheltered intertidal mussel bed. / Holm, Mark Wejlemann; Davids, Jens; Dolmer, Per; Vismann, Bent; Holmes, Esbern; Nielsen, Thomas Theis; Hansen, Benni Winding.

I: Journal of Sea Research, Bind 104, 2015, s. 1-8.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Moderate establishment success of Pacific oyster, Crassostrea gigas, on a sheltered intertidal mussel bed

AU - Holm, Mark Wejlemann

AU - Davids, Jens

AU - Dolmer, Per

AU - Vismann, Bent

AU - Holmes, Esbern

AU - Nielsen, Thomas Theis

AU - Hansen, Benni Winding

PY - 2015

Y1 - 2015

N2 - The Pacific oyster (Crassostrea gigas Thunberg 1793) is introduced into marine ecosystems worldwide. In Denmark, C. gigas was introduced into the micro tidal Limfjord, around 1972 for aquaculture. This study describes the population structure of C. gigas at Agger Tange in 2007, 2009, 2010 and 2011. Here, C. gigas use beds of Blue mussels (Mytilus edulis L.) as primary habitat. The mean abundance (± 1 SD) of C. gigas was unchanged during our study (45 ± 2 indv. m− 2), while it increased for M. edulis from 2010 to 2011 (934 ± 610 to 1434 ± 750 indv. m− 2, respectively). In 2009, a newly settled cohort of C. gigas was present, but in the succeeding years no or negligible recruitment was recorded. However, age cohort analyses, based on individual shell size at different ages, suggest successful recruitment in three out of seven years. A comparison with the course of the bioinvasion in List Tidal Basin, suggests that the population at Agger Tange is not in the expansion phase of the bioinvasion, despite of frequent settlement, high shell growth rates and relatively high abundance. So far, C. gigas has had moderate establishment success. We conclude that C. gigas is still in the establishment phase, but that this is prolonged, presumably due to low food availability

AB - The Pacific oyster (Crassostrea gigas Thunberg 1793) is introduced into marine ecosystems worldwide. In Denmark, C. gigas was introduced into the micro tidal Limfjord, around 1972 for aquaculture. This study describes the population structure of C. gigas at Agger Tange in 2007, 2009, 2010 and 2011. Here, C. gigas use beds of Blue mussels (Mytilus edulis L.) as primary habitat. The mean abundance (± 1 SD) of C. gigas was unchanged during our study (45 ± 2 indv. m− 2), while it increased for M. edulis from 2010 to 2011 (934 ± 610 to 1434 ± 750 indv. m− 2, respectively). In 2009, a newly settled cohort of C. gigas was present, but in the succeeding years no or negligible recruitment was recorded. However, age cohort analyses, based on individual shell size at different ages, suggest successful recruitment in three out of seven years. A comparison with the course of the bioinvasion in List Tidal Basin, suggests that the population at Agger Tange is not in the expansion phase of the bioinvasion, despite of frequent settlement, high shell growth rates and relatively high abundance. So far, C. gigas has had moderate establishment success. We conclude that C. gigas is still in the establishment phase, but that this is prolonged, presumably due to low food availability

U2 - 10.1016/j.seares.2015.07.009

DO - 10.1016/j.seares.2015.07.009

M3 - Journal article

VL - 104

SP - 1

EP - 8

JO - Journal of Sea Research

JF - Journal of Sea Research

SN - 1385-1101

ER -