Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii

Autores
Eastman, Joseph T.; Barrera Oro, Esteban; Moreira, María Eugenia
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We studied the buoyancy of 263 specimens of the sympatric sister species Notothenia coriiceps and N. rossii captured at King George Island. In these species without a swim bladder, we expressed measurements of buoyancy as percentage buoyancy (%B = weight in water/weight in air × 100), with smaller numbers reflecting more buoyant (i.e. less dense) species. Mean %B of N. coriiceps (4.34%) was significantly greater than that of N. rossii (3.82%), reflecting the lower density and more active swimming, migratory, and feeding behavior of N. rossii compared to N. coriiceps. Skeletal weight as a percentage of body weight was also significantly greater in N. coriiceps (2.46%) than N. rossii (1.65%). Paradoxically, the weight of the vertebral column as a percentage of skeletal weight was significantly greater in N. rossii (28.01%) than in N. coriiceps (24.29%); however, this is intelligible in light of the bone anatomy and histology. Our sample encompassed a wide size and age range, and trend lines for scatter plots of %B against standard length were curvilinear for both species, peaking at 140 to 160 mm, a phenomenon not previously seen in studies of notothenioid buoyancy. We conclude that the ontogenetic increase in %B (reduced buoyancy) in fingerlings/young juveniles and the ontogenetic decrease in %B (increased buoyancy) in older juveniles/immature adults reflects disproportionate growth of skeletal and visceral tissues, respectively, and is not causally related to concurrent pelagic-demersal habitat shifts.
Fil: Eastman, Joseph T.. Ohio University; Estados Unidos
Fil: Barrera Oro, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
NOTOTHENIOID
ONTOGENETIC VARIATION
SKELETAL ANATOMY AND HISTOLOGY
SOUTH SHETLAND ISLANDS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/193589
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossiiEastman, Joseph T.Barrera Oro, EstebanMoreira, María EugeniaNOTOTHENIOIDONTOGENETIC VARIATIONSKELETAL ANATOMY AND HISTOLOGYSOUTH SHETLAND ISLANDShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We studied the buoyancy of 263 specimens of the sympatric sister species Notothenia coriiceps and N. rossii captured at King George Island. In these species without a swim bladder, we expressed measurements of buoyancy as percentage buoyancy (%B = weight in water/weight in air × 100), with smaller numbers reflecting more buoyant (i.e. less dense) species. Mean %B of N. coriiceps (4.34%) was significantly greater than that of N. rossii (3.82%), reflecting the lower density and more active swimming, migratory, and feeding behavior of N. rossii compared to N. coriiceps. Skeletal weight as a percentage of body weight was also significantly greater in N. coriiceps (2.46%) than N. rossii (1.65%). Paradoxically, the weight of the vertebral column as a percentage of skeletal weight was significantly greater in N. rossii (28.01%) than in N. coriiceps (24.29%); however, this is intelligible in light of the bone anatomy and histology. Our sample encompassed a wide size and age range, and trend lines for scatter plots of %B against standard length were curvilinear for both species, peaking at 140 to 160 mm, a phenomenon not previously seen in studies of notothenioid buoyancy. We conclude that the ontogenetic increase in %B (reduced buoyancy) in fingerlings/young juveniles and the ontogenetic decrease in %B (increased buoyancy) in older juveniles/immature adults reflects disproportionate growth of skeletal and visceral tissues, respectively, and is not causally related to concurrent pelagic-demersal habitat shifts.Fil: Eastman, Joseph T.. Ohio University; Estados UnidosFil: Barrera Oro, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaInter-Research2011-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/193589Eastman, Joseph T.; Barrera Oro, Esteban; Moreira, María Eugenia; Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii; Inter-Research; Marine Ecology Progress Series; 438; 10-2011; 195-2060171-8630CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v438/p195-206/info:eu-repo/semantics/altIdentifier/doi/ 10.3354/meps09287info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:57:46Zoai:ri.conicet.gov.ar:11336/193589instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:57:46.817CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
title Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
spellingShingle Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
Eastman, Joseph T.
NOTOTHENIOID
ONTOGENETIC VARIATION
SKELETAL ANATOMY AND HISTOLOGY
SOUTH SHETLAND ISLANDS
title_short Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
title_full Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
title_fullStr Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
title_full_unstemmed Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
title_sort Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii
dc.creator.none.fl_str_mv Eastman, Joseph T.
Barrera Oro, Esteban
Moreira, María Eugenia
author Eastman, Joseph T.
author_facet Eastman, Joseph T.
Barrera Oro, Esteban
Moreira, María Eugenia
author_role author
author2 Barrera Oro, Esteban
Moreira, María Eugenia
author2_role author
author
dc.subject.none.fl_str_mv NOTOTHENIOID
ONTOGENETIC VARIATION
SKELETAL ANATOMY AND HISTOLOGY
SOUTH SHETLAND ISLANDS
topic NOTOTHENIOID
ONTOGENETIC VARIATION
SKELETAL ANATOMY AND HISTOLOGY
SOUTH SHETLAND ISLANDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We studied the buoyancy of 263 specimens of the sympatric sister species Notothenia coriiceps and N. rossii captured at King George Island. In these species without a swim bladder, we expressed measurements of buoyancy as percentage buoyancy (%B = weight in water/weight in air × 100), with smaller numbers reflecting more buoyant (i.e. less dense) species. Mean %B of N. coriiceps (4.34%) was significantly greater than that of N. rossii (3.82%), reflecting the lower density and more active swimming, migratory, and feeding behavior of N. rossii compared to N. coriiceps. Skeletal weight as a percentage of body weight was also significantly greater in N. coriiceps (2.46%) than N. rossii (1.65%). Paradoxically, the weight of the vertebral column as a percentage of skeletal weight was significantly greater in N. rossii (28.01%) than in N. coriiceps (24.29%); however, this is intelligible in light of the bone anatomy and histology. Our sample encompassed a wide size and age range, and trend lines for scatter plots of %B against standard length were curvilinear for both species, peaking at 140 to 160 mm, a phenomenon not previously seen in studies of notothenioid buoyancy. We conclude that the ontogenetic increase in %B (reduced buoyancy) in fingerlings/young juveniles and the ontogenetic decrease in %B (increased buoyancy) in older juveniles/immature adults reflects disproportionate growth of skeletal and visceral tissues, respectively, and is not causally related to concurrent pelagic-demersal habitat shifts.
Fil: Eastman, Joseph T.. Ohio University; Estados Unidos
Fil: Barrera Oro, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Moreira, María Eugenia. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We studied the buoyancy of 263 specimens of the sympatric sister species Notothenia coriiceps and N. rossii captured at King George Island. In these species without a swim bladder, we expressed measurements of buoyancy as percentage buoyancy (%B = weight in water/weight in air × 100), with smaller numbers reflecting more buoyant (i.e. less dense) species. Mean %B of N. coriiceps (4.34%) was significantly greater than that of N. rossii (3.82%), reflecting the lower density and more active swimming, migratory, and feeding behavior of N. rossii compared to N. coriiceps. Skeletal weight as a percentage of body weight was also significantly greater in N. coriiceps (2.46%) than N. rossii (1.65%). Paradoxically, the weight of the vertebral column as a percentage of skeletal weight was significantly greater in N. rossii (28.01%) than in N. coriiceps (24.29%); however, this is intelligible in light of the bone anatomy and histology. Our sample encompassed a wide size and age range, and trend lines for scatter plots of %B against standard length were curvilinear for both species, peaking at 140 to 160 mm, a phenomenon not previously seen in studies of notothenioid buoyancy. We conclude that the ontogenetic increase in %B (reduced buoyancy) in fingerlings/young juveniles and the ontogenetic decrease in %B (increased buoyancy) in older juveniles/immature adults reflects disproportionate growth of skeletal and visceral tissues, respectively, and is not causally related to concurrent pelagic-demersal habitat shifts.
publishDate 2011
dc.date.none.fl_str_mv 2011-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/193589
Eastman, Joseph T.; Barrera Oro, Esteban; Moreira, María Eugenia; Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii; Inter-Research; Marine Ecology Progress Series; 438; 10-2011; 195-206
0171-8630
CONICET Digital
CONICET
url http://hdl.handle.net/11336/193589
identifier_str_mv Eastman, Joseph T.; Barrera Oro, Esteban; Moreira, María Eugenia; Adaptive radiation at a low taxonomic level: Divergence in buoyancy of the ecologically similar Antarctic fish Notothenia coriiceps and N. rossii; Inter-Research; Marine Ecology Progress Series; 438; 10-2011; 195-206
0171-8630
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/meps/v438/p195-206/
info:eu-repo/semantics/altIdentifier/doi/ 10.3354/meps09287
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Inter-Research
publisher.none.fl_str_mv Inter-Research
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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