Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods

Autores
Cristini, Paula Andrea; Bayer, María Sol
Año de publicación
2022
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Molluscan death assemblages are useful for reconstructing paleocommunities. In spite thatmolluscan predators are rarely preserved in Quaternary marine sediments, they provide signals forevaluating predation recorded as round holes in shells, recognized as the trace fossil Oichnus. Onthe other hand, the bivalve Glycymeris longior is one of the most abundant species found in fossiland modern shell assemblages from the coasts of Buenos Aires Province. Glycymeris longior livesat the surf zone, between the intertidal zone and 20 m depth. Their shells are robust and can resistthe taphonomically active zone, which allows recording the postmortem history of shells. The highabundance of G. longior at Mar del Plata?s coasts suggests that this species could be an importantprey item on the food web. Thus, our study aims to identify Oichnus ichnospecies in G. longiorshells to unveil the possible gastropod predators in modern death assemblages from Mar del Plata.Therefore, we took samples from the high tide line with a quadrat (50 cm x 50 cm) from twobeaches of Mar del Plata. Samples were washed in a 1 mm diameter sieve mesh and 1165 valveswere recovered from Unzué Beach (UB) and 202 valves from Camet Norte Beach (CNB). Shelllengths were measured and Oichnus ichnospecies were identified in G. longior shells. This bivalvecorresponded to 41.8% and 77.7% of the total assemblages in UB and CNB respectively, and therewere no drilling gastropods except the only specimen of the muricean Urosalpinx cala found at UB.However, the 10.7% and 3.2% of G. longior shells from both assemblages exhibited the presence ofdrill holes, specifically Oichnus paraboloides, which possible producers are naticid gastropods.Shell sizes varied between 5.29 mm and 17.19 mm in UB (a sandy beach) and between 19.21 mmand 39.28 mm in CNB (an abrasion platform beach). We expect that smaller shells of G. longior(less robust than larger ones) are more prone to be successfully attacked by gastropods predatorsthan larger ones. In addition, 100% of Oichnus records corresponded to O. paraboloides of smallsizes. Moreover, a higher proportion of these traces were recorded in the sandy bottom assemblage(UB). This might correspond to a predation pressure produced by small-sized naticid gastropods,with low chances to be preserved in the shell assemblage. However, predation pressure is evidenced by drill holes in small shells of G. longior.
Fil: Cristini, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Bayer, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina 2022
Salta
Argentina
Asociación Paleontológica Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del Noroeste Argentino
Universidad Nacional de Salta. Instituto para el Estudio de la Biodiversidad de Invertebrados
Universidad Nacional de Salta. Colección Naturales Salta
Materia
GLYCYMERIS LONGIOR
PREDATION
OICHNUS
BONAERENSE COAST
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:11336/271597

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network_name_str CONICET Digital (CONICET)
spelling Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropodsCristini, Paula AndreaBayer, María SolGLYCYMERIS LONGIORPREDATIONOICHNUSBONAERENSE COASThttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Molluscan death assemblages are useful for reconstructing paleocommunities. In spite thatmolluscan predators are rarely preserved in Quaternary marine sediments, they provide signals forevaluating predation recorded as round holes in shells, recognized as the trace fossil Oichnus. Onthe other hand, the bivalve Glycymeris longior is one of the most abundant species found in fossiland modern shell assemblages from the coasts of Buenos Aires Province. Glycymeris longior livesat the surf zone, between the intertidal zone and 20 m depth. Their shells are robust and can resistthe taphonomically active zone, which allows recording the postmortem history of shells. The highabundance of G. longior at Mar del Plata?s coasts suggests that this species could be an importantprey item on the food web. Thus, our study aims to identify Oichnus ichnospecies in G. longiorshells to unveil the possible gastropod predators in modern death assemblages from Mar del Plata.Therefore, we took samples from the high tide line with a quadrat (50 cm x 50 cm) from twobeaches of Mar del Plata. Samples were washed in a 1 mm diameter sieve mesh and 1165 valveswere recovered from Unzué Beach (UB) and 202 valves from Camet Norte Beach (CNB). Shelllengths were measured and Oichnus ichnospecies were identified in G. longior shells. This bivalvecorresponded to 41.8% and 77.7% of the total assemblages in UB and CNB respectively, and therewere no drilling gastropods except the only specimen of the muricean Urosalpinx cala found at UB.However, the 10.7% and 3.2% of G. longior shells from both assemblages exhibited the presence ofdrill holes, specifically Oichnus paraboloides, which possible producers are naticid gastropods.Shell sizes varied between 5.29 mm and 17.19 mm in UB (a sandy beach) and between 19.21 mmand 39.28 mm in CNB (an abrasion platform beach). We expect that smaller shells of G. longior(less robust than larger ones) are more prone to be successfully attacked by gastropods predatorsthan larger ones. In addition, 100% of Oichnus records corresponded to O. paraboloides of smallsizes. Moreover, a higher proportion of these traces were recorded in the sandy bottom assemblage(UB). This might correspond to a predation pressure produced by small-sized naticid gastropods,with low chances to be preserved in the shell assemblage. However, predation pressure is evidenced by drill holes in small shells of G. longior.Fil: Cristini, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Bayer, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaReunión de Comunicaciones de la Asociación Paleontológica Argentina 2022SaltaArgentinaAsociación Paleontológica ArgentinaConsejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del Noroeste ArgentinoUniversidad Nacional de Salta. Instituto para el Estudio de la Biodiversidad de InvertebradosUniversidad Nacional de Salta. Colección Naturales SaltaAsociación Paleontológica Argentina2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/271597Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods; Reunión de Comunicaciones de la Asociación Paleontológica Argentina 2022; Salta; Argentina; 2022; 51-512469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://peapaleontologica.org.ar//index.php/peapa/article/view/462Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:43:28Zoai:ri.conicet.gov.ar:11336/271597instacron: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:34982025-09-29 10:43:29.188CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
title Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
spellingShingle Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
Cristini, Paula Andrea
GLYCYMERIS LONGIOR
PREDATION
OICHNUS
BONAERENSE COAST
title_short Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
title_full Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
title_fullStr Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
title_full_unstemmed Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
title_sort Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods
dc.creator.none.fl_str_mv Cristini, Paula Andrea
Bayer, María Sol
author Cristini, Paula Andrea
author_facet Cristini, Paula Andrea
Bayer, María Sol
author_role author
author2 Bayer, María Sol
author2_role author
dc.subject.none.fl_str_mv GLYCYMERIS LONGIOR
PREDATION
OICHNUS
BONAERENSE COAST
topic GLYCYMERIS LONGIOR
PREDATION
OICHNUS
BONAERENSE COAST
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Molluscan death assemblages are useful for reconstructing paleocommunities. In spite thatmolluscan predators are rarely preserved in Quaternary marine sediments, they provide signals forevaluating predation recorded as round holes in shells, recognized as the trace fossil Oichnus. Onthe other hand, the bivalve Glycymeris longior is one of the most abundant species found in fossiland modern shell assemblages from the coasts of Buenos Aires Province. Glycymeris longior livesat the surf zone, between the intertidal zone and 20 m depth. Their shells are robust and can resistthe taphonomically active zone, which allows recording the postmortem history of shells. The highabundance of G. longior at Mar del Plata?s coasts suggests that this species could be an importantprey item on the food web. Thus, our study aims to identify Oichnus ichnospecies in G. longiorshells to unveil the possible gastropod predators in modern death assemblages from Mar del Plata.Therefore, we took samples from the high tide line with a quadrat (50 cm x 50 cm) from twobeaches of Mar del Plata. Samples were washed in a 1 mm diameter sieve mesh and 1165 valveswere recovered from Unzué Beach (UB) and 202 valves from Camet Norte Beach (CNB). Shelllengths were measured and Oichnus ichnospecies were identified in G. longior shells. This bivalvecorresponded to 41.8% and 77.7% of the total assemblages in UB and CNB respectively, and therewere no drilling gastropods except the only specimen of the muricean Urosalpinx cala found at UB.However, the 10.7% and 3.2% of G. longior shells from both assemblages exhibited the presence ofdrill holes, specifically Oichnus paraboloides, which possible producers are naticid gastropods.Shell sizes varied between 5.29 mm and 17.19 mm in UB (a sandy beach) and between 19.21 mmand 39.28 mm in CNB (an abrasion platform beach). We expect that smaller shells of G. longior(less robust than larger ones) are more prone to be successfully attacked by gastropods predatorsthan larger ones. In addition, 100% of Oichnus records corresponded to O. paraboloides of smallsizes. Moreover, a higher proportion of these traces were recorded in the sandy bottom assemblage(UB). This might correspond to a predation pressure produced by small-sized naticid gastropods,with low chances to be preserved in the shell assemblage. However, predation pressure is evidenced by drill holes in small shells of G. longior.
Fil: Cristini, Paula Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Bayer, María Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina 2022
Salta
Argentina
Asociación Paleontológica Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del Noroeste Argentino
Universidad Nacional de Salta. Instituto para el Estudio de la Biodiversidad de Invertebrados
Universidad Nacional de Salta. Colección Naturales Salta
description Molluscan death assemblages are useful for reconstructing paleocommunities. In spite thatmolluscan predators are rarely preserved in Quaternary marine sediments, they provide signals forevaluating predation recorded as round holes in shells, recognized as the trace fossil Oichnus. Onthe other hand, the bivalve Glycymeris longior is one of the most abundant species found in fossiland modern shell assemblages from the coasts of Buenos Aires Province. Glycymeris longior livesat the surf zone, between the intertidal zone and 20 m depth. Their shells are robust and can resistthe taphonomically active zone, which allows recording the postmortem history of shells. The highabundance of G. longior at Mar del Plata?s coasts suggests that this species could be an importantprey item on the food web. Thus, our study aims to identify Oichnus ichnospecies in G. longiorshells to unveil the possible gastropod predators in modern death assemblages from Mar del Plata.Therefore, we took samples from the high tide line with a quadrat (50 cm x 50 cm) from twobeaches of Mar del Plata. Samples were washed in a 1 mm diameter sieve mesh and 1165 valveswere recovered from Unzué Beach (UB) and 202 valves from Camet Norte Beach (CNB). Shelllengths were measured and Oichnus ichnospecies were identified in G. longior shells. This bivalvecorresponded to 41.8% and 77.7% of the total assemblages in UB and CNB respectively, and therewere no drilling gastropods except the only specimen of the muricean Urosalpinx cala found at UB.However, the 10.7% and 3.2% of G. longior shells from both assemblages exhibited the presence ofdrill holes, specifically Oichnus paraboloides, which possible producers are naticid gastropods.Shell sizes varied between 5.29 mm and 17.19 mm in UB (a sandy beach) and between 19.21 mmand 39.28 mm in CNB (an abrasion platform beach). We expect that smaller shells of G. longior(less robust than larger ones) are more prone to be successfully attacked by gastropods predatorsthan larger ones. In addition, 100% of Oichnus records corresponded to O. paraboloides of smallsizes. Moreover, a higher proportion of these traces were recorded in the sandy bottom assemblage(UB). This might correspond to a predation pressure produced by small-sized naticid gastropods,with low chances to be preserved in the shell assemblage. However, predation pressure is evidenced by drill holes in small shells of G. longior.
publishDate 2022
dc.date.none.fl_str_mv 2022
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Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods; Reunión de Comunicaciones de la Asociación Paleontológica Argentina 2022; Salta; Argentina; 2022; 51-51
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/271597
identifier_str_mv Predation evidence in the bonaerense coast: Glycymeris longior (Bivalvia) as a possible victim of gastropods; Reunión de Comunicaciones de la Asociación Paleontológica Argentina 2022; Salta; Argentina; 2022; 51-51
2469-0228
CONICET Digital
CONICET
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language eng
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