The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata

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The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana inhabiting Panopea abbreviata, from San José Gulf, Patagonia, Argentina, and the nemertean-host relationship were investigated. The mature nemertean population showed a sex ratio of 1:0.64, with females predominating. The n...

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Autores principales: Valeria Teso, S., Bigatti, G., Bazterrica, M.C., Ciocco, N.F., Penchaszadeh, P.E.
Formato: JOUR
Lenguaje:English
Materias:
Bdellonemertea
Gonadic development
Southwestern Atlantic
Spawning
Malacobdella
Nemertea
Panopea abbreviata
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10778306_v125_n4_p314_ValeriaTeso
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10778306_v125_n4_p314_ValeriaTeso
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spelling todo:paper_10778306_v125_n4_p314_ValeriaTeso2023-10-03T16:03:32Z The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata Valeria Teso, S. Bigatti, G. Bazterrica, M.C. Ciocco, N.F. Penchaszadeh, P.E. Bdellonemertea Gonadic development Southwestern Atlantic Spawning Bdellonemertea Malacobdella Nemertea Panopea abbreviata The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana inhabiting Panopea abbreviata, from San José Gulf, Patagonia, Argentina, and the nemertean-host relationship were investigated. The mature nemertean population showed a sex ratio of 1:0.64, with females predominating. The number of individuals of M. arrokeana per host varied from 1-60 individuals (mean ± SD = 3.7 ± 9.4 mm). Different stages of gonadic development were observed in individual nemerteans. Spawning peaks occurred during late summer and early spring. Sexually mature individuals of both sexes were present year round, possibly indicative of a continuous breeding period. Our results suggest that M. arrokeana has no cannibalistic habits and confirm its entocommensal symbiosis with P. abbreviata. © 2006, The American Microscopical Society, Inc. Fil:Valeria Teso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bigatti, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Penchaszadeh, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10778306_v125_n4_p314_ValeriaTeso
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Bdellonemertea
Gonadic development
Southwestern Atlantic
Spawning
Bdellonemertea
Malacobdella
Nemertea
Panopea abbreviata
spellingShingle Bdellonemertea
Gonadic development
Southwestern Atlantic
Spawning
Bdellonemertea
Malacobdella
Nemertea
Panopea abbreviata
Valeria Teso, S.
Bigatti, G.
Bazterrica, M.C.
Ciocco, N.F.
Penchaszadeh, P.E.
The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
topic_facet Bdellonemertea
Gonadic development
Southwestern Atlantic
Spawning
Bdellonemertea
Malacobdella
Nemertea
Panopea abbreviata
description The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana inhabiting Panopea abbreviata, from San José Gulf, Patagonia, Argentina, and the nemertean-host relationship were investigated. The mature nemertean population showed a sex ratio of 1:0.64, with females predominating. The number of individuals of M. arrokeana per host varied from 1-60 individuals (mean ± SD = 3.7 ± 9.4 mm). Different stages of gonadic development were observed in individual nemerteans. Spawning peaks occurred during late summer and early spring. Sexually mature individuals of both sexes were present year round, possibly indicative of a continuous breeding period. Our results suggest that M. arrokeana has no cannibalistic habits and confirm its entocommensal symbiosis with P. abbreviata. © 2006, The American Microscopical Society, Inc.
format JOUR
author Valeria Teso, S.
Bigatti, G.
Bazterrica, M.C.
Ciocco, N.F.
Penchaszadeh, P.E.
author_facet Valeria Teso, S.
Bigatti, G.
Bazterrica, M.C.
Ciocco, N.F.
Penchaszadeh, P.E.
author_sort Valeria Teso, S.
title The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
title_short The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
title_full The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
title_fullStr The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
title_full_unstemmed The reproductive cycle of the entocommensal nemertean Malacobdella arrokeana and its symbiosis with the geoduck Panopea abbreviata
title_sort reproductive cycle of the entocommensal nemertean malacobdella arrokeana and its symbiosis with the geoduck panopea abbreviata
url http://hdl.handle.net/20.500.12110/paper_10778306_v125_n4_p314_ValeriaTeso
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AT valeriatesos reproductivecycleoftheentocommensalnemerteanmalacobdellaarrokeanaanditssymbiosiswiththegeoduckpanopeaabbreviata
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