Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction.
It is known that specimens of Amphibolus can carry out both cryptobiosis (anhydrobiosis and cryobiosis) and encystment and that they produce two types of cysts (type 1 and type 2). In Amphibolus nebulosus from Greenland, the type 1 cyst is related to winter and the type 2 to summer. In Amphibolus vo...
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2006
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ftunivmodena:oai:iris.unimore.it:11380/596086 2024-01-14T10:07:24+01:00 Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. GUIDETTI, Roberto BOSCHINI, Deborah BERTOLANI, Roberto REBECCHI, Lorena G. Pilato Guidetti, Roberto Boschini, Deborah Bertolani, Roberto Rebecchi, Lorena 2006 STAMPA http://hdl.handle.net/11380/596086 eng eng Università di Catania country:ITA place:Catania ispartofbook:Tenth International Symposium on Tardigrada Tenth International Symposium on Tardigrada volume:Volume unico firstpage:45 lastpage:45 http://hdl.handle.net/11380/596086 Tardigrada cyst Amphibolu laboratory induction info:eu-repo/semantics/conferenceObject 2006 ftunivmodena 2023-12-19T23:22:26Z It is known that specimens of Amphibolus can carry out both cryptobiosis (anhydrobiosis and cryobiosis) and encystment and that they produce two types of cysts (type 1 and type 2). In Amphibolus nebulosus from Greenland, the type 1 cyst is related to winter and the type 2 to summer. In Amphibolus volubilis, found in Apennines (Monte Rondinaio, Italy), a detailed description of the encystment processes has been done, but not of the relationships between climatic factors and dynamics of the cyst 1 and cyst 2. Therefore, a study on seasonal dynamics of the A. volubilis cysts has been carried out with monthly samplings, from March 2003 up to March 2005. For each sampling, all specimens present in five-six replicates of 0.5 g of moss have been collected and analyzed.In all samplings, non-encysted and encysted animals (type 1 or type 2 cysts) have been found. The cyst trends are similar in the two considered years. Type 1 cysts have been found from November to March-April, but they were present in a very low percentage with respect to the total animals. Type 2 cysts have been found from June to October and are often more abundant than the non-encysted tardigrades. The two types of cysts never overlap. Correlation tests have evidenced that dynamics of type 2 cyst is positively related to the air temperature (T) and negatively related to the relative humidity (RH) of the air. The trend of type 1 cyst is negatively related to T, while no relationship to RH has been evidenced. The presence of non-encysted animals is negatively related to T and positively related to RH. Experiments of encystment induction have been performed in laboratory. In the same experimental conditions (same temperature, photoperiod, food and oxygen availability), non-encysted animals collected in April form type 2 cysts, whereas animals collected in November form type 1 cysts. The number of days to enter each type of cyst is related to experimental temperature. At the same temperature, the animals spent less time to enter in type 1 cyst than in type ... Conference Object Greenland Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) Greenland |
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Open Polar |
collection |
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
op_collection_id |
ftunivmodena |
language |
English |
topic |
Tardigrada cyst Amphibolu laboratory induction |
spellingShingle |
Tardigrada cyst Amphibolu laboratory induction GUIDETTI, Roberto BOSCHINI, Deborah BERTOLANI, Roberto REBECCHI, Lorena Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
topic_facet |
Tardigrada cyst Amphibolu laboratory induction |
description |
It is known that specimens of Amphibolus can carry out both cryptobiosis (anhydrobiosis and cryobiosis) and encystment and that they produce two types of cysts (type 1 and type 2). In Amphibolus nebulosus from Greenland, the type 1 cyst is related to winter and the type 2 to summer. In Amphibolus volubilis, found in Apennines (Monte Rondinaio, Italy), a detailed description of the encystment processes has been done, but not of the relationships between climatic factors and dynamics of the cyst 1 and cyst 2. Therefore, a study on seasonal dynamics of the A. volubilis cysts has been carried out with monthly samplings, from March 2003 up to March 2005. For each sampling, all specimens present in five-six replicates of 0.5 g of moss have been collected and analyzed.In all samplings, non-encysted and encysted animals (type 1 or type 2 cysts) have been found. The cyst trends are similar in the two considered years. Type 1 cysts have been found from November to March-April, but they were present in a very low percentage with respect to the total animals. Type 2 cysts have been found from June to October and are often more abundant than the non-encysted tardigrades. The two types of cysts never overlap. Correlation tests have evidenced that dynamics of type 2 cyst is positively related to the air temperature (T) and negatively related to the relative humidity (RH) of the air. The trend of type 1 cyst is negatively related to T, while no relationship to RH has been evidenced. The presence of non-encysted animals is negatively related to T and positively related to RH. Experiments of encystment induction have been performed in laboratory. In the same experimental conditions (same temperature, photoperiod, food and oxygen availability), non-encysted animals collected in April form type 2 cysts, whereas animals collected in November form type 1 cysts. The number of days to enter each type of cyst is related to experimental temperature. At the same temperature, the animals spent less time to enter in type 1 cyst than in type ... |
author2 |
G. Pilato Guidetti, Roberto Boschini, Deborah Bertolani, Roberto Rebecchi, Lorena |
format |
Conference Object |
author |
GUIDETTI, Roberto BOSCHINI, Deborah BERTOLANI, Roberto REBECCHI, Lorena |
author_facet |
GUIDETTI, Roberto BOSCHINI, Deborah BERTOLANI, Roberto REBECCHI, Lorena |
author_sort |
GUIDETTI, Roberto |
title |
Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
title_short |
Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
title_full |
Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
title_fullStr |
Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
title_full_unstemmed |
Cysts of Amphibolus volubilis (Eutardigrada, Eohypsibiidae): seasonal dynamics and laboratory induction. |
title_sort |
cysts of amphibolus volubilis (eutardigrada, eohypsibiidae): seasonal dynamics and laboratory induction. |
publisher |
Università di Catania |
publishDate |
2006 |
url |
http://hdl.handle.net/11380/596086 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
ispartofbook:Tenth International Symposium on Tardigrada Tenth International Symposium on Tardigrada volume:Volume unico firstpage:45 lastpage:45 http://hdl.handle.net/11380/596086 |
_version_ |
1788061813393326080 |