Interazioni simbiotiche tra il labride pulitore Symphodus Melanocercus e i suoi ospiti nel Mar Ligure
Abstract
It
Per due anni (1998-1999), sono state rilevate le relazioni di pulizia che legano Symphodus melanocercus ai suoi clienti nell’AMP del Promontorio di Portofino. La maggior parte delle interazioni ha interessato 5 specie. Solo Sarpa salpa prendeva sempre per prima l’iniziativa e non tollerava la vicinanza del pulitore senza il suo consenso. Negli altri casi l’iniziativa era presa sia dal pulitore che dal cliente. La fine dell’interazione era stabilita dal pulitore nel caso di Symphodus tinca e Serranus cabrilla, invece era sempre stabilita dal cliente nel caso di S. salpa, e poteva essere conclusa indifferentemente dal pulitore o dal cliente negli altri due casi. Nessun giovane (piccola taglia) è mai stato ispezionato da un pulitore. Molte ispezioni sembravano voler rafforzare i legami con i propri clienti e rendere meno traumatici i successivi approcci.
En
An investigation performed by snorkelling for two years (1998-199) along three coastal stations (2-3m depth) of the Portofino Promontory, have allowed to record some of the complex symbiotic relationships of cleaning that tie the little wrasse, Symphodus melanocercus, to his hosts. In both years of investigations the observations were performed from the beginning of June up to half October since in the other months the wrasse disappeared from the sites in examination. A total of 19 species was cleaned by S. melanocercus, but most interactions have regarded Symphodus tinca, Serranus scriba, Sarpa salpa, Coris julis and S. cabrilla. The cleaning were indifferently solicited by the little wrasse or by S. tinca, S. scriba, C. julis and S. cabrilla. Instead, the former to solicit the cleaning was S. salpa. The cleaning was always terminated by the little wrasse during the interactions with S. tinca and S. cabrilla, while was indifferently terminated by it or by S. scriba and C. julis. The cleaning was instead always terminated by S. salpa. No host of little size (juvenile) was cleaned by the wrasse while it indifferently cleaned both subadult and adult specimens. Many inspections seemed to be mainly performed to strengthen the bonds with his own customers and therefore to make more sure and less traumatic the future meetings with the same individuals.
Per due anni (1998-1999), sono state rilevate le relazioni di pulizia che legano Symphodus melanocercus ai suoi clienti nell’AMP del Promontorio di Portofino. La maggior parte delle interazioni ha interessato 5 specie. Solo Sarpa salpa prendeva sempre per prima l’iniziativa e non tollerava la vicinanza del pulitore senza il suo consenso. Negli altri casi l’iniziativa era presa sia dal pulitore che dal cliente. La fine dell’interazione era stabilita dal pulitore nel caso di Symphodus tinca e Serranus cabrilla, invece era sempre stabilita dal cliente nel caso di S. salpa, e poteva essere conclusa indifferentemente dal pulitore o dal cliente negli altri due casi. Nessun giovane (piccola taglia) è mai stato ispezionato da un pulitore. Molte ispezioni sembravano voler rafforzare i legami con i propri clienti e rendere meno traumatici i successivi approcci.
En
An investigation performed by snorkelling for two years (1998-199) along three coastal stations (2-3m depth) of the Portofino Promontory, have allowed to record some of the complex symbiotic relationships of cleaning that tie the little wrasse, Symphodus melanocercus, to his hosts. In both years of investigations the observations were performed from the beginning of June up to half October since in the other months the wrasse disappeared from the sites in examination. A total of 19 species was cleaned by S. melanocercus, but most interactions have regarded Symphodus tinca, Serranus scriba, Sarpa salpa, Coris julis and S. cabrilla. The cleaning were indifferently solicited by the little wrasse or by S. tinca, S. scriba, C. julis and S. cabrilla. Instead, the former to solicit the cleaning was S. salpa. The cleaning was always terminated by the little wrasse during the interactions with S. tinca and S. cabrilla, while was indifferently terminated by it or by S. scriba and C. julis. The cleaning was instead always terminated by S. salpa. No host of little size (juvenile) was cleaned by the wrasse while it indifferently cleaned both subadult and adult specimens. Many inspections seemed to be mainly performed to strengthen the bonds with his own customers and therefore to make more sure and less traumatic the future meetings with the same individuals.
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