Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal

Detalhes bibliográficos
Autor(a) principal: Cruz, T.
Data de Publicação: 2010
Outros Autores: Castro, João J., Hawkins, Stephen J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/5519
https://doi.org/10.1016/j.jembe.2010.04.020
Resumo: A general model for the life cycle of Pollicipes pollicipes in SW Portugal is proposed integrating results from a study on recruitment, growth and population size structure. A brief summary of literature concerning Pollicipes published since Margaret Barnes' review paper of 1996 is presented. Recruitment of P. pollicipes on conspecifics (number of cyprids and juveniles with Rostro-Carinal length (RC) <0.6 mm per adult) was intense during summer and autumn, but inter-annual variation in the timing and duration of recruitment season was observed. Different indices of recruitment used in Iberian studies were compared. Spatial correlation between shores (∼40 km apart) inSWPortugal suggests that cyprids of P. pollicipes are being affected by the same larval pool and physical transport processes operating at this scale. Recruitment of P. pollicipes in SW Portugal was higher on the low shore (∼2.5 times) than on the high shore. Most recruitswere attached to the lower half of the adult peduncle. The period of maximumattachment of juveniles (RC <12.5mm) to conspecificswas summer and autumn (average of 15 juveniles per adult),while spring was the seasonwith a lower number of juveniles growing on adults (average of 2 juveniles). Size of juveniles attached to conspecifics was rarely greater than 6 mm RC. Individual annual growth rate of P. pollicipes that settled on a denuded surface was 15.7mm RC (individuals ≤ 1 year old) which corresponds to a monthly increment of 1.3mm RC in their first year of life. Size structure analyses of P. pollicipes attached directly to primary substratum and/or to the base of conspecifics showed that barnacles at the low tide level reached a higher maximum size, indicating that growth at this level was faster than on the high shore. A higher temporal variability between these size-frequency distributions was detected in spring (March to May). InMarch, two cohorts (< year old, > year old) were identified. In May and August, itwas difficult to identify individual different cohorts. Frommid autumnto early spring, as a consequence of recruitment of barnacles to the primary substratum, it was again possible to identify two cohorts.
id RCAP_7190cacf460dff4566c96e7cb94e5958
oai_identifier_str oai:dspace.uevora.pt:10174/5519
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Recruitment, growth and population size structure of Pollicipes pollicipes in SW PortugalBarnaclesGrowthPollicipes pollicipesPortugalRecruitmentSize structureA general model for the life cycle of Pollicipes pollicipes in SW Portugal is proposed integrating results from a study on recruitment, growth and population size structure. A brief summary of literature concerning Pollicipes published since Margaret Barnes' review paper of 1996 is presented. Recruitment of P. pollicipes on conspecifics (number of cyprids and juveniles with Rostro-Carinal length (RC) <0.6 mm per adult) was intense during summer and autumn, but inter-annual variation in the timing and duration of recruitment season was observed. Different indices of recruitment used in Iberian studies were compared. Spatial correlation between shores (∼40 km apart) inSWPortugal suggests that cyprids of P. pollicipes are being affected by the same larval pool and physical transport processes operating at this scale. Recruitment of P. pollicipes in SW Portugal was higher on the low shore (∼2.5 times) than on the high shore. Most recruitswere attached to the lower half of the adult peduncle. The period of maximumattachment of juveniles (RC <12.5mm) to conspecificswas summer and autumn (average of 15 juveniles per adult),while spring was the seasonwith a lower number of juveniles growing on adults (average of 2 juveniles). Size of juveniles attached to conspecifics was rarely greater than 6 mm RC. Individual annual growth rate of P. pollicipes that settled on a denuded surface was 15.7mm RC (individuals ≤ 1 year old) which corresponds to a monthly increment of 1.3mm RC in their first year of life. Size structure analyses of P. pollicipes attached directly to primary substratum and/or to the base of conspecifics showed that barnacles at the low tide level reached a higher maximum size, indicating that growth at this level was faster than on the high shore. A higher temporal variability between these size-frequency distributions was detected in spring (March to May). InMarch, two cohorts (< year old, > year old) were identified. In May and August, itwas difficult to identify individual different cohorts. Frommid autumnto early spring, as a consequence of recruitment of barnacles to the primary substratum, it was again possible to identify two cohorts.2012-11-13T18:22:43Z2012-11-132010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/5519http://hdl.handle.net/10174/5519https://doi.org/10.1016/j.jembe.2010.04.020eng200-209392Journal of Experimental Marine Biology and Ecologyndndnd223Cruz, T.Castro, João J.Hawkins, Stephen J.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:44:24Zoai:dspace.uevora.pt:10174/5519Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:00:33.449072Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
title Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
spellingShingle Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
Cruz, T.
Barnacles
Growth
Pollicipes pollicipes
Portugal
Recruitment
Size structure
title_short Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
title_full Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
title_fullStr Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
title_full_unstemmed Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
title_sort Recruitment, growth and population size structure of Pollicipes pollicipes in SW Portugal
author Cruz, T.
author_facet Cruz, T.
Castro, João J.
Hawkins, Stephen J.
author_role author
author2 Castro, João J.
Hawkins, Stephen J.
author2_role author
author
dc.contributor.author.fl_str_mv Cruz, T.
Castro, João J.
Hawkins, Stephen J.
dc.subject.por.fl_str_mv Barnacles
Growth
Pollicipes pollicipes
Portugal
Recruitment
Size structure
topic Barnacles
Growth
Pollicipes pollicipes
Portugal
Recruitment
Size structure
description A general model for the life cycle of Pollicipes pollicipes in SW Portugal is proposed integrating results from a study on recruitment, growth and population size structure. A brief summary of literature concerning Pollicipes published since Margaret Barnes' review paper of 1996 is presented. Recruitment of P. pollicipes on conspecifics (number of cyprids and juveniles with Rostro-Carinal length (RC) <0.6 mm per adult) was intense during summer and autumn, but inter-annual variation in the timing and duration of recruitment season was observed. Different indices of recruitment used in Iberian studies were compared. Spatial correlation between shores (∼40 km apart) inSWPortugal suggests that cyprids of P. pollicipes are being affected by the same larval pool and physical transport processes operating at this scale. Recruitment of P. pollicipes in SW Portugal was higher on the low shore (∼2.5 times) than on the high shore. Most recruitswere attached to the lower half of the adult peduncle. The period of maximumattachment of juveniles (RC <12.5mm) to conspecificswas summer and autumn (average of 15 juveniles per adult),while spring was the seasonwith a lower number of juveniles growing on adults (average of 2 juveniles). Size of juveniles attached to conspecifics was rarely greater than 6 mm RC. Individual annual growth rate of P. pollicipes that settled on a denuded surface was 15.7mm RC (individuals ≤ 1 year old) which corresponds to a monthly increment of 1.3mm RC in their first year of life. Size structure analyses of P. pollicipes attached directly to primary substratum and/or to the base of conspecifics showed that barnacles at the low tide level reached a higher maximum size, indicating that growth at this level was faster than on the high shore. A higher temporal variability between these size-frequency distributions was detected in spring (March to May). InMarch, two cohorts (< year old, > year old) were identified. In May and August, itwas difficult to identify individual different cohorts. Frommid autumnto early spring, as a consequence of recruitment of barnacles to the primary substratum, it was again possible to identify two cohorts.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01T00:00:00Z
2012-11-13T18:22:43Z
2012-11-13
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/5519
http://hdl.handle.net/10174/5519
https://doi.org/10.1016/j.jembe.2010.04.020
url http://hdl.handle.net/10174/5519
https://doi.org/10.1016/j.jembe.2010.04.020
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 200-209
392
Journal of Experimental Marine Biology and Ecology
nd
nd
nd
223
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799136488188805120