The identity and biology of unio mancus laMarck, 1819 (=U. Elongatulus) (bivalvia: unionidae) in the Iberian Peninsula
Identifieur interne : 000E03 ( Main/Exploration ); précédent : 000E02; suivant : 000E04The identity and biology of unio mancus laMarck, 1819 (=U. Elongatulus) (bivalvia: unionidae) in the Iberian Peninsula
Auteurs : Rafael Araujo [Espagne] ; Ignacio Go Mez [Espagne] ; Annie Machordom [Espagne]Source :
- Journal of Molluscan Studies [ 0260-1230 ] ; 2005-02.
Abstract
Genetic variability, shell morphology, anatomy, reproductive season, glochidium morphology and host fish of several Iberian populations of Unio mancus Lamarck, 1819 (=U. elongatulus C. Pfeiffer, 1825) were examined. The genetics of three allopatric populations were studied, including two ‘races’ previously described for this species on the Iberian Peninsula. All shared the same haplotype of the COI mitochondrial gene. It is proposed that all known Iberian Mediterranean populations of the genus Unio correspond to Unio mancus. All mature specimens studied were dioecious. Glochidial release occurred between March and August. The barbel Barbus graellsii was the natural host of the U. mancus glochidia in the studied area. In artificial infestations performed in aquaria, seven fish species, all native, carried the glochidia throughout their complete metamorphosis. This process occurred in 141 degree/days. Newly released juveniles were spherical and had a thin marginal rim of new shell.
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DOI: 10.1093/mollus/eyi002
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Stud.</title><idno type="ISSN">0260-1230</idno><idno type="eISSN">1464-3766</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2005-02">2005-02</date><biblScope unit="volume">71</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="25">25</biblScope><biblScope unit="page" to="31">31</biblScope></imprint><idno type="ISSN">0260-1230</idno></series><idno type="istex">3A12978366DF92D94C2199B5BCA2990DD5D94288</idno><idno type="DOI">10.1093/mollus/eyi002</idno><idno type="href">eyi002.pdf</idno><idno type="local">eyi002</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0260-1230</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Genetic variability, shell morphology, anatomy, reproductive season, glochidium morphology and host fish of several Iberian populations of Unio mancus Lamarck, 1819 (=U. elongatulus C. Pfeiffer, 1825) were examined. The genetics of three allopatric populations were studied, including two ‘races’ previously described for this species on the Iberian Peninsula. All shared the same haplotype of the COI mitochondrial gene. It is proposed that all known Iberian Mediterranean populations of the genus Unio correspond to Unio mancus. All mature specimens studied were dioecious. Glochidial release occurred between March and August. The barbel Barbus graellsii was the natural host of the U. mancus glochidia in the studied area. In artificial infestations performed in aquaria, seven fish species, all native, carried the glochidia throughout their complete metamorphosis. This process occurred in 141 degree/days. 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