Intrahost distribution and trasmission of a new species of cyclopoid copepod endosymbiotic to a freshwater snail, Pomacea canaliculata (Caenogastropoda, Ampullariidae), from Argentina
Biocell
;
28(2): 155-164, ago. 2004. ilus, tab
Article
Dans Anglais
| LILACS
| ID: lil-403129
RESUMEN
A new species of cyclopoid copepod, Ozmana huarpium, is described as a symbiont to Pomacea canaliculata (Lamarck 1822) (Caenogastropoda, Ampullariidae). Rather large numbers (about one hundred copepods per snail)were found, althought there was no evidence of harm to the host. To our knowledge, O. haemophila (symbiont to P. maculata), and the currently described species, O. huarpium, are the only copepod species ever recorded as endosymbionts to freshwater invertebrates. While O. haemophila is restricted to the haemocoel of its host, O. harpium predominate in the penis sheath, the ctenidium and the mantle cavity, figuring in these pallial organs 63-65 por ciento of total mature forms. The sex ratio of the symbiont is skewed to the female side in these organs, specially in male hosts. The hypothesis that a special female tropism for the male host´s pallial organs might ensure interindividual transmission of the symbiont was tested, with indications that the symbiont is mainly transmitted during copulation.
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Indice:
LILAS (Amériques)
Sujet Principal:
Escargots
/
Symbiose
/
Copepoda
Limites du sujet:
Animaux
Pays comme sujet:
Amérique du Sud
/
Argentine
langue:
Anglais
Texte intégral:
Biocell
Thème du journal:
Clulas
Année:
2004
Type:
Article
Pays d'affiliation:
Argentine
Institution/Pays d'affiliation:
University of Cuyo/AR
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