Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season.
Abstract Waterbirds are known to disperse invertebrate propagules that survive gut passage, but there is very little information about how the probability of dispersal changes at different times of the annual cycle when birds move in different directions, or how it is affected by changes in diet. We...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1083.6572 2023-05-15T18:49:36+02:00 Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. Marta I Sánchez Andy J Green Francisco Amat Eloy M Castellanos The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1083.6572 http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1083.6572 http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf text 2007 ftciteseerx 2020-05-03T00:29:07Z Abstract Waterbirds are known to disperse invertebrate propagules that survive gut passage, but there is very little information about how the probability of dispersal changes at different times of the annual cycle when birds move in different directions, or how it is affected by changes in diet. We studied internal transport of brine shrimp Artemia cysts by migratory waders in the Odiel saltworks in south-west Spain. Viable cysts of parthenogenetic Artemia were abundant in the faeces and regurgitated pellets of Redshank Tringa totanus, pellets of Spotted Redshank Tringa erythropus, and faeces of Black-tailed Godwit Limosa limosa during spring and/or autumn migrations in 2001-2002, but were not recorded during winter. Godwits did not produce pellets, and Spotted Redshank faeces were not sampled. Significant correlations between the number of cysts in a pellet or faecal sample and the proportion of that sample constituted by Artemia adults suggested that most cysts were ingested while in the ovisacs of gravid females. The proportion of cysts destroyed during digestion increased when accompanied by harder food items or grit, and when fewer cysts were ingested. The median number of intact cysts was higher in Redshank faeces than in their pellets, but cysts extracted from pellets were more likely to hatch. A higher proportion of Redshank pellets contained Artemia cysts in spring than in autumn, but more Redshank migrated through the area in autumn. Significantly fewer cysts were recorded in Redshank pellets in winter than in spring or autumn. Our results confirm that there is potential for long-distance dispersal of Artemia cysts via waders during both northwards (spring) and southwards (autumn) migrations. Text black-tailed godwit Limosa limosa Unknown |
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English |
description |
Abstract Waterbirds are known to disperse invertebrate propagules that survive gut passage, but there is very little information about how the probability of dispersal changes at different times of the annual cycle when birds move in different directions, or how it is affected by changes in diet. We studied internal transport of brine shrimp Artemia cysts by migratory waders in the Odiel saltworks in south-west Spain. Viable cysts of parthenogenetic Artemia were abundant in the faeces and regurgitated pellets of Redshank Tringa totanus, pellets of Spotted Redshank Tringa erythropus, and faeces of Black-tailed Godwit Limosa limosa during spring and/or autumn migrations in 2001-2002, but were not recorded during winter. Godwits did not produce pellets, and Spotted Redshank faeces were not sampled. Significant correlations between the number of cysts in a pellet or faecal sample and the proportion of that sample constituted by Artemia adults suggested that most cysts were ingested while in the ovisacs of gravid females. The proportion of cysts destroyed during digestion increased when accompanied by harder food items or grit, and when fewer cysts were ingested. The median number of intact cysts was higher in Redshank faeces than in their pellets, but cysts extracted from pellets were more likely to hatch. A higher proportion of Redshank pellets contained Artemia cysts in spring than in autumn, but more Redshank migrated through the area in autumn. Significantly fewer cysts were recorded in Redshank pellets in winter than in spring or autumn. Our results confirm that there is potential for long-distance dispersal of Artemia cysts via waders during both northwards (spring) and southwards (autumn) migrations. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Marta I Sánchez Andy J Green Francisco Amat Eloy M Castellanos |
spellingShingle |
Marta I Sánchez Andy J Green Francisco Amat Eloy M Castellanos Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
author_facet |
Marta I Sánchez Andy J Green Francisco Amat Eloy M Castellanos |
author_sort |
Marta I Sánchez |
title |
Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
title_short |
Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
title_full |
Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
title_fullStr |
Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
title_full_unstemmed |
Transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
title_sort |
transport of brine shrimps via the digestive system of migratory waders: dispersal probabilities depend on diet and season. |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1083.6572 http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf |
genre |
black-tailed godwit Limosa limosa |
genre_facet |
black-tailed godwit Limosa limosa |
op_source |
http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1083.6572 http://www.ebd.csic.es/andy/MarBiolAuthorVersion.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766243203724345344 |