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Comparing cestode infections and their consequences for host fitness in two sexual branchiopods: alien Artemia franciscana and native A. salina from syntopic-populations.

Redón S, Amat F, Sánchez MI, Green AJ - PeerJ (2015)

Bottom Line: Both these effects were significantly stronger in the native host than in A. franciscana with the same parasite loads.However, for the first time, significant castration effects (for E. avoceti and F. liguloides) and colour change (for six cestode species) were observed in infected A. franciscana.At the same time, they are likely to reduce the production of A. franciscana cysts in areas where they are harvested commercially.

View Article: PubMed Central - HTML - PubMed

Affiliation: Instituto de Acuicultura de Torre de la Sal (IATS-CSIC), Ribera de Cabanes s/n , Castellón , Spain.

ABSTRACT
The American brine shrimp Artemia franciscana is invasive in the Mediterranean region where it has displaced native species (the sexual A. salina, and the clonal A. parthenogenetica) from many salt pond complexes. Artemia populations are parasitized by numerous avian cestodes whose effects have been studied in native species. We present a study from the Ebro Delta salterns (NE Spain), in a salt pond where both A. franciscana and native A. salina populations coexist, providing a unique opportunity to compare the parasite loads of the two sexual species in syntopy. The native species had consistently higher infection parameters, largely because the dominant cestode in A. salina adults and juveniles (Flamingolepis liguloides) was much rarer in A. franciscana. The most abundant cestodes in the alien species were Eurycestus avoceti (in adults) and Flamingolepis flamingo (in juveniles). The abundance of E. avoceti and F. liguloides was higher in the A. franciscana population syntopic with A. salina than in a population sampled at the same time in another pond where the native brine shrimp was absent, possibly because the native shrimp provides a better reservoir for parasite circulation. Infection by cestodes caused red colouration in adult and juvenile A. salina, and also led to castration in a high proportion of adult females. Both these effects were significantly stronger in the native host than in A. franciscana with the same parasite loads. However, for the first time, significant castration effects (for E. avoceti and F. liguloides) and colour change (for six cestode species) were observed in infected A. franciscana. Avian cestodes are likely to help A. franciscana outcompete native species. At the same time, they are likely to reduce the production of A. franciscana cysts in areas where they are harvested commercially.

No MeSH data available.


Related in: MedlinePlus

Geographical situation of the study area.Location of the Ebro Delta (Province of Tarragona, NE Spain) and map of the Ebro Delta salterns La Trinitat indicating the Artemia collection sites: (1) Pond 4, (2) Pond CX.
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fig-1: Geographical situation of the study area.Location of the Ebro Delta (Province of Tarragona, NE Spain) and map of the Ebro Delta salterns La Trinitat indicating the Artemia collection sites: (1) Pond 4, (2) Pond CX.

Mentions: The Ebro Delta (Province of Tarragona, NE Spain) is the largest wetland area (320 km2) along the Mediterranean coast of Spain and is protected as a Natural Park, Ramsar site and an EU Special Protection Area for birds. Artemia franciscana was first detected in our study area (La Trinitat coastal salterns, 40°35′N, 00°41′E, Fig. 1) in 2007 (Amat et al., 2007). Previously, these salterns supported a tetraploid parthenogenetic population of Artemia (Amat et al., 1995), but this native taxon has not been recorded since.


Comparing cestode infections and their consequences for host fitness in two sexual branchiopods: alien Artemia franciscana and native A. salina from syntopic-populations.

Redón S, Amat F, Sánchez MI, Green AJ - PeerJ (2015)

Geographical situation of the study area.Location of the Ebro Delta (Province of Tarragona, NE Spain) and map of the Ebro Delta salterns La Trinitat indicating the Artemia collection sites: (1) Pond 4, (2) Pond CX.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493677&req=5

fig-1: Geographical situation of the study area.Location of the Ebro Delta (Province of Tarragona, NE Spain) and map of the Ebro Delta salterns La Trinitat indicating the Artemia collection sites: (1) Pond 4, (2) Pond CX.
Mentions: The Ebro Delta (Province of Tarragona, NE Spain) is the largest wetland area (320 km2) along the Mediterranean coast of Spain and is protected as a Natural Park, Ramsar site and an EU Special Protection Area for birds. Artemia franciscana was first detected in our study area (La Trinitat coastal salterns, 40°35′N, 00°41′E, Fig. 1) in 2007 (Amat et al., 2007). Previously, these salterns supported a tetraploid parthenogenetic population of Artemia (Amat et al., 1995), but this native taxon has not been recorded since.

Bottom Line: Both these effects were significantly stronger in the native host than in A. franciscana with the same parasite loads.However, for the first time, significant castration effects (for E. avoceti and F. liguloides) and colour change (for six cestode species) were observed in infected A. franciscana.At the same time, they are likely to reduce the production of A. franciscana cysts in areas where they are harvested commercially.

View Article: PubMed Central - HTML - PubMed

Affiliation: Instituto de Acuicultura de Torre de la Sal (IATS-CSIC), Ribera de Cabanes s/n , Castellón , Spain.

ABSTRACT
The American brine shrimp Artemia franciscana is invasive in the Mediterranean region where it has displaced native species (the sexual A. salina, and the clonal A. parthenogenetica) from many salt pond complexes. Artemia populations are parasitized by numerous avian cestodes whose effects have been studied in native species. We present a study from the Ebro Delta salterns (NE Spain), in a salt pond where both A. franciscana and native A. salina populations coexist, providing a unique opportunity to compare the parasite loads of the two sexual species in syntopy. The native species had consistently higher infection parameters, largely because the dominant cestode in A. salina adults and juveniles (Flamingolepis liguloides) was much rarer in A. franciscana. The most abundant cestodes in the alien species were Eurycestus avoceti (in adults) and Flamingolepis flamingo (in juveniles). The abundance of E. avoceti and F. liguloides was higher in the A. franciscana population syntopic with A. salina than in a population sampled at the same time in another pond where the native brine shrimp was absent, possibly because the native shrimp provides a better reservoir for parasite circulation. Infection by cestodes caused red colouration in adult and juvenile A. salina, and also led to castration in a high proportion of adult females. Both these effects were significantly stronger in the native host than in A. franciscana with the same parasite loads. However, for the first time, significant castration effects (for E. avoceti and F. liguloides) and colour change (for six cestode species) were observed in infected A. franciscana. Avian cestodes are likely to help A. franciscana outcompete native species. At the same time, they are likely to reduce the production of A. franciscana cysts in areas where they are harvested commercially.

No MeSH data available.


Related in: MedlinePlus