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Full Access Mimachlamys varia (Mollusca, Bivalvia) epibiontic on Galathea strigosa (Decapoda, Galatheidae) in the North Adriatic Sea

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Mimachlamys varia (Mollusca, Bivalvia) epibiontic on Galathea strigosa (Decapoda, Galatheidae) in the North Adriatic Sea

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[Fifty-six specimens of Mimachlamys varia epibiontic on a single specimen of Galathea strigosa are reported from the North Adriatic Sea. Their size suggests the specimens are from a few days to a maximum of 3 months old after metamorphosis. The main advantage for the epibiont is a suitable hard substratum for settling on an otherwise unsuitable soft substratum, while the main disadvantage is that the periodic moultings of the crab allow only a few months of settling. However, Mimachlamys is able to release its byssus, swim, and settle elsewhere. Due to the small size of the epibionts, neither advantages nor disadvantages for the basibiont could be recognized. Su un esemplare di Galathea strigosa proveniente dal Mar Adriatico settentrionale sono stati rinvenuti 56 esemplari di Mimachlamys varia. La loro taglia suggerisce che questi esemplari siano di età compresa tra pochi giorni e massimo 3 mesi dalla metamorfosi. I vantaggi e gli svantaggi di questa epibiosi sono discussi. Il principale vantaggio per l'epibionte consiste nell'aver trovato un substrato rigido per svilupparsi in un ambiente dominato da inadatti substrati mobili. Il principale svantaggio per l'epibionte è la muta periodica di Galathea che dopo pochi mesi lo costringe a trovare un nuovo substrato, cosa che Mimachlamys è in grado di fare rilasciando il bisso e nuotando altrove. Data la piccola taglia degli epibionti, non si individuano particolari vantaggi o svantaggi per Galathea., Fifty-six specimens of Mimachlamys varia epibiontic on a single specimen of Galathea strigosa are reported from the North Adriatic Sea. Their size suggests the specimens are from a few days to a maximum of 3 months old after metamorphosis. The main advantage for the epibiont is a suitable hard substratum for settling on an otherwise unsuitable soft substratum, while the main disadvantage is that the periodic moultings of the crab allow only a few months of settling. However, Mimachlamys is able to release its byssus, swim, and settle elsewhere. Due to the small size of the epibionts, neither advantages nor disadvantages for the basibiont could be recognized. Su un esemplare di Galathea strigosa proveniente dal Mar Adriatico settentrionale sono stati rinvenuti 56 esemplari di Mimachlamys varia. La loro taglia suggerisce che questi esemplari siano di età compresa tra pochi giorni e massimo 3 mesi dalla metamorfosi. I vantaggi e gli svantaggi di questa epibiosi sono discussi. Il principale vantaggio per l'epibionte consiste nell'aver trovato un substrato rigido per svilupparsi in un ambiente dominato da inadatti substrati mobili. Il principale svantaggio per l'epibionte è la muta periodica di Galathea che dopo pochi mesi lo costringe a trovare un nuovo substrato, cosa che Mimachlamys è in grado di fare rilasciando il bisso e nuotando altrove. Data la piccola taglia degli epibionti, non si individuano particolari vantaggi o svantaggi per Galathea.]

Affiliations: 1: Department of Experimental Evolutionary Biology, University of Bologna, c/o Prof. B. Sabelli, via Selmi, 3, I-40126 Bologna, Italy; 2: Fossalta (Ferrara), Italy

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/content/journals/10.1163/001121610x546742
2011-01-01
2016-05-30

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