Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)

Volvox barberi W. Shaw is a volvocalean green alga composed of biflagellated cells. Vovocales with 16 cells or more form spherical colonies, and their largest members have germ-soma separation (all species in the genus Volvox). V. barberi is the largest Volvox species recorded in terms of cell numbe...

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Guardado en:
Detalles Bibliográficos
Publicado: 2008
Materias:
Hydrodynamics
Motility
Multicellularity
Swimming speeds
Volvocales
Volvox barberi
algae
Chlamydomonadales
Chlorophyceae
Chlorophyta
Volvox
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v44_n6_p1395_Solari
http://hdl.handle.net/20.500.12110/paper_00223646_v44_n6_p1395_Solari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00223646_v44_n6_p1395_Solari
record_format dspace
spelling paper:paper_00223646_v44_n6_p1395_Solari2023-06-08T14:50:06Z Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae) Hydrodynamics Motility Multicellularity Swimming speeds Volvocales Volvox barberi algae Chlamydomonadales Chlorophyceae Chlorophyta Volvox Volvox barberi Volvox barberi W. Shaw is a volvocalean green alga composed of biflagellated cells. Vovocales with 16 cells or more form spherical colonies, and their largest members have germ-soma separation (all species in the genus Volvox). V. barberi is the largest Volvox species recorded in terms of cell number (10,000-50,000 cells) and has the highest somatic to reproductive cell ratio (S/R). Since they are negatively buoyant, Volvocales need flagellar beating to avoid sinking and to reach light and nutrients. We measured V. barberi swimming speed and total swimming force. V. barberi swimming speeds are the highest recorded so far for volvocine algae (∼600 μm·s -1). With this speed, V. barberi colonies have the potential to perform daily vertical migrations in the water column at speeds of 2-3 m·h-1, consistent with what has been reported about Volvox populations in the wild. Moreover, V. barberi data fit well in the scaling relationships derived with the other smaller Volvox species, namely, that the upward swimming speed Vup ∝ N 0.28 and the total swimming force FS ∝ N 0.77 (N = colony cell number). These allometric relationships have been important supporting evidence for reaching the conclusion that as size increases, colonies have to invest in cell specialization and increase their S/R to increase their motility capabilities to stay afloat and motile. © 2008 Phycological Society of America. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v44_n6_p1395_Solari http://hdl.handle.net/20.500.12110/paper_00223646_v44_n6_p1395_Solari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Hydrodynamics
Motility
Multicellularity
Swimming speeds
Volvocales
Volvox barberi
algae
Chlamydomonadales
Chlorophyceae
Chlorophyta
Volvox
Volvox barberi
spellingShingle Hydrodynamics
Motility
Multicellularity
Swimming speeds
Volvocales
Volvox barberi
algae
Chlamydomonadales
Chlorophyceae
Chlorophyta
Volvox
Volvox barberi
Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
topic_facet Hydrodynamics
Motility
Multicellularity
Swimming speeds
Volvocales
Volvox barberi
algae
Chlamydomonadales
Chlorophyceae
Chlorophyta
Volvox
Volvox barberi
description Volvox barberi W. Shaw is a volvocalean green alga composed of biflagellated cells. Vovocales with 16 cells or more form spherical colonies, and their largest members have germ-soma separation (all species in the genus Volvox). V. barberi is the largest Volvox species recorded in terms of cell number (10,000-50,000 cells) and has the highest somatic to reproductive cell ratio (S/R). Since they are negatively buoyant, Volvocales need flagellar beating to avoid sinking and to reach light and nutrients. We measured V. barberi swimming speed and total swimming force. V. barberi swimming speeds are the highest recorded so far for volvocine algae (∼600 μm·s -1). With this speed, V. barberi colonies have the potential to perform daily vertical migrations in the water column at speeds of 2-3 m·h-1, consistent with what has been reported about Volvox populations in the wild. Moreover, V. barberi data fit well in the scaling relationships derived with the other smaller Volvox species, namely, that the upward swimming speed Vup ∝ N 0.28 and the total swimming force FS ∝ N 0.77 (N = colony cell number). These allometric relationships have been important supporting evidence for reaching the conclusion that as size increases, colonies have to invest in cell specialization and increase their S/R to increase their motility capabilities to stay afloat and motile. © 2008 Phycological Society of America.
title Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
title_short Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
title_full Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
title_fullStr Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
title_full_unstemmed Volvox barberi, the fastest swimmer of the Volvocales (Chlorophyceae)
title_sort volvox barberi, the fastest swimmer of the volvocales (chlorophyceae)
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v44_n6_p1395_Solari
http://hdl.handle.net/20.500.12110/paper_00223646_v44_n6_p1395_Solari
_version_ 1768543407013101568

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