scholarly journals First report of cestode infection in the crustacean Artemia persimilis from Southern Chilean Patagonia and its relation with the Neotropical aquatic birds

2019 ◽  
Author(s):  
Stella Redón ◽  
Gergana P Vasileva ◽  
Boyko B Georgiev ◽  
Gonzalo Gajardo
Keyword(s):  
Life Cycle ◽  
Species Interactions ◽  
South American ◽  
Helminth Parasites ◽  
Aquatic Birds ◽  
South American Species ◽  
Parasite Life Cycle ◽  
First Report ◽  
Chilean Patagonia ◽  
Artemia Persimilis

The brine shrimp Artemia Leach (Crustacea, Branchiopoda), a keystone species in extremely saline wetlands all over the world, offers an excellent model to study species interactions (parasitism) and to elucidate “hidden fauna” (avian endoparasites). The present study is the first report on the parasite infection of the South American species Artemia persimilis from the Southern Chilean Patagonia (50ºS-53ºS). Samples were collected in Los Cisnes and Amarga lagoons, the two most austral populations of this crustacean described to date, during two seasons (spring and autumn). A total of 98 larvae of cestodes of the family Hymenolepididae (Cestoda, Cyclophyllidea) were found and identified as belonging to the following taxa: Confluaria podicipina (adult parasitic in grebes), Flamingolepis sp. (a cestode parasite of flamingos), Fimbriarioides (?) sp. (adults of the species of this genus infect waterfowl and shorebirds) and Wardium sp. (definitive host unknown, most probably charadriiform birds). This is a new geographical record of C. podicipina and the undescribed species Fimbriarioides (?) sp. for the Neotropical Region, the latter being the most widely distributed species at both localities and seasons surveyed, and the only species recorded in autumn (April). Cestode community composition in the Los Cisnes population was characterised by dominance of Flamingolepis sp., representing more than 65% of the total cestode species recorded, whereas in the Amarga population the most abundant parasite (> 83%) was Fimbriarioides (?) sp. Significant seasonal variations were detected in Cisnes lagoon for Flamingolepis sp. and C. podicipina, with exclusive presence of them in spring (November). Besides providing novel information on cestodes infection in A. persimilis, this study provides new data on the life-cycle of cestodes of Neotropical aquatic birds such as South American flamingos and grebes. Our finding expands the knowledge on the biodiversity and population dynamics of extreme and unique environments from high latitudes (Patagonia), but makes evident the need of further taxonomical and ecological studies to better understanding the life cycle of avian helminth parasites in the Neotropics, and to elucidate the role of aquatic invertebrates in the parasite life cycle in hypersaline wetlands from the Americas.

scholarly journals First report of cestode infection in the crustacean Artemia persimilis from Southern Chilean Patagonia and its relation with the Neotropical aquatic birds

2019 ◽  
Author(s):  
Stella Redón ◽  
Gergana P Vasileva ◽  
Boyko B Georgiev ◽  
Gonzalo Gajardo
Keyword(s):  
Life Cycle ◽  
Species Interactions ◽  
South American ◽  
Helminth Parasites ◽  
Aquatic Birds ◽  
South American Species ◽  
Parasite Life Cycle ◽  
First Report ◽  
Chilean Patagonia ◽  
Artemia Persimilis

The brine shrimp Artemia Leach (Crustacea, Branchiopoda), a keystone species in extremely saline wetlands all over the world, offers an excellent model to study species interactions (parasitism) and to elucidate “hidden fauna” (avian endoparasites). The present study is the first report on the parasite infection of the South American species Artemia persimilis from the Southern Chilean Patagonia (50ºS-53ºS). Samples were collected in Los Cisnes and Amarga lagoons, the two most austral populations of this crustacean described to date, during two seasons (spring and autumn). A total of 98 larvae of cestodes of the family Hymenolepididae (Cestoda, Cyclophyllidea) were found and identified as belonging to the following taxa: Confluaria podicipina (adult parasitic in grebes), Flamingolepis sp. (a cestode parasite of flamingos), Fimbriarioides (?) sp. (adults of the species of this genus infect waterfowl and shorebirds) and Wardium sp. (definitive host unknown, most probably charadriiform birds). This is a new geographical record of C. podicipina and the undescribed species Fimbriarioides (?) sp. for the Neotropical Region, the latter being the most widely distributed species at both localities and seasons surveyed, and the only species recorded in autumn (April). Cestode community composition in the Los Cisnes population was characterised by dominance of Flamingolepis sp., representing more than 65% of the total cestode species recorded, whereas in the Amarga population the most abundant parasite (> 83%) was Fimbriarioides (?) sp. Significant seasonal variations were detected in Cisnes lagoon for Flamingolepis sp. and C. podicipina, with exclusive presence of them in spring (November). Besides providing novel information on cestodes infection in A. persimilis, this study provides new data on the life-cycle of cestodes of Neotropical aquatic birds such as South American flamingos and grebes. Our finding expands the knowledge on the biodiversity and population dynamics of extreme and unique environments from high latitudes (Patagonia), but makes evident the need of further taxonomical and ecological studies to better understanding the life cycle of avian helminth parasites in the Neotropics, and to elucidate the role of aquatic invertebrates in the parasite life cycle in hypersaline wetlands from the Americas.

scholarly journals First report of cestode infection in the crustaceanArtemia persimilisfrom Southern Chilean Patagonia and its relation with the Neotropical aquatic birds

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7395 ◽  
Author(s):  
Stella Redón ◽  
Gergana P. Vasileva ◽  
Boyko B. Georgiev ◽  
Gonzalo Gajardo
Keyword(s):  
Species Interactions ◽  
Neotropical Region ◽  
Life Cycles ◽  
South American ◽  
Helminth Parasites ◽  
Aquatic Birds ◽  
South American Species ◽  
First Report ◽  
Chilean Patagonia ◽  
New Geographical Record

The brine shrimp genusArtemiaLeach (Crustacea, Branchiopoda), a keystone group in hipersaline wetlands all over the world, offers an excellent model to study species interactions (parasitism) and to explore “hidden fauna” (avian endoparasites). The present study is the first report on the parasite infection of the South American speciesArtemia persimilisfrom the Southern Chilean Patagonia (50°S–53°S). Samples were collected in Los Cisnes and Amarga lagoons, the two most austral populations of this crustacean described to date, during two seasons (spring and autumn). A total of 98 larvae of cestodes of the family Hymenolepididae (Cestoda, Cyclophyllidea) were found and identified as belonging to the following taxa:Confluaria podicipina(adult parasitic in grebes),Flamingolepissp. (a cestode parasite of flamingos),Fimbriarioides(?) sp. (adults of the species of this genus infect waterfowl and shorebirds) andWardiumsp. (definitive host unknown, most probably charadriiform birds). This is a new geographical record ofC. podicipinaand the genusFimbriarioidesfor the Neotropical Region, the latter being the most widely distributed species at both localities and seasons surveyed, and the only species recorded in autumn (April). Cestode community composition in Los Cisnes population was characterised by dominance ofFlamingolepissp., representing more than 65% of the total cestode species recorded, whereas in the Amarga population the most abundant parasite (>83%) wasFimbriarioides(?) sp. Significant seasonal variations were detected in Los Cisnes lagoon forFlamingolepissp. andC. podicipina, with exclusive presence of them in spring (November). Besides providing novel information on cestodes infection inA. persimilis,this study provides new data on the life cycle of cestodes of Neotropical aquatic birds such as South American flamingos and grebes. Our finding expands the knowledge on the biodiversity and population dynamics of extreme and unique environments from high latitudes (Patagonia) and makes evident the need of further taxonomical and ecological studies for better understanding the life cycles of avian helminth parasites in the Neotropics and the role of aquatic invertebrates in them.

On the geographic distribution of Boeckella brevicaudata (Brady, 1875) (Copepoda, Calanoida) and its species associations in seasonal ephemeral pools in the Magallanes region (53°S, Chile)

Crustaceana ◽  
2014 ◽  
Vol 87 (5) ◽  
pp. 540-550 ◽  
Author(s):  
Patricio De los Ríos-Escalante ◽  
Andrés Mansilla
Keyword(s):  
Calanoid Copepod ◽  
Null Model ◽  
Niche Overlap ◽  
Model Analysis ◽  
South American ◽  
South American Species ◽  
Mineral Contents ◽  
Ephemeral Pools ◽  
Chilean Patagonia ◽  
Southern Patagonia

The distribution of crustaceans of inland waters in southern Patagonia is characterized by the presence of sub-Antarctic and southern South American species. The aims of the present study were to study the geographical distribution of the calanoid copepod Boeckella brevicaudata (Brady, 1875) and the community structure of the zooplankton assemblages in which this species occurs. This last purpose was approached by applying null-models analyses based on species co-occurrence and niche-sharing. The species itself inhabits sub-Antarctic islands as well as southern South America. The results of the co-occurrence null model analysis revealed that the communities with this species have no regulating factors, whereas the niche overlap null model analysis revealed that these species share the same ecological niche. We thus found low abundances for all species, with specifically low B. brevicaudata abundance, at low mineral contents of the water. The results obtained were similar among sites in southern Argentinean and southern Chilean Patagonia, and on sub-Antarctic islands of which data were available.

Description of a new Amblystira (Hemiptera: Heteroptera: Tingidae) from Argentina with a key to the South American species of the genus

Zootaxa ◽  
2010 ◽  
Vol 2675 (1) ◽  
pp. 65 ◽  
Author(s):  
SARA I. MONTEMAYOR
Keyword(s):  
Life Cycle ◽  
South America ◽  
Manihot Esculenta ◽  
New World ◽  
South American ◽  
The South ◽  
South American Species ◽  
Manihot Esculenta Crantz ◽  
Important Crop

Amblystira Stål is a new world American genus comprising nineteen species, most of them distributed in Central and South America. Nine species have been recorded from South America, and only Amblystira silvicola Drake is known from Argentina (Drake & Ruhoff, 1965). Members of the genus are dark, the cephalic spines are generally absent or poorly developed, the hood is absent, the paranota are scarcely developed or absent as well as the lateral pronotal carinae, the discoidal area is short not reaching the middle of the hemelytra, and the costal area is slender. The only member of the genus that has been recorded as a pest is Amblystira machalana Van Duzee, commonly known as “black lacebug”, which feeds on cassava, Manihot esculenta Crantz, an important crop of South America. Arias & Belloti (2003) studied the life cycle, behavior, and damage caused by A. machalana on M. esculenta. (Guilbert, 2005) described the fifth instar of Amblystira peltogyne Drake & Hambleton.

Cnidochloa: A New Genus of Grasses from Brazil (Poaceae: Panicoideae: Paniceae)

2020 ◽  
Vol 105 (2) ◽  
pp. 183-194
Author(s):  
Fernando O. Zuloaga ◽  
Sandra S. Aliscioni ◽  
M. Amalia Scataglini
Keyword(s):  
New Genus ◽  
Phylogenetic Position ◽  
South American ◽  
The South ◽  
South American Species ◽  
Molecular Characters

Generic boundaries of the South American species Panicum longipedicellatum Swallen are explored and compared with allied genera of the tribe Paniceae. On the basis of morphological, anatomical, and molecular characters a new genus, Cnidochloa Zuloaga, is proposed. The phylogenetic position of the new genus within the Paniceae is evaluated.

A New Cleistogamous South American Species of Eragrostis (Poaceae: Chloridoideae)

Brittonia ◽  
1990 ◽  
Vol 42 (1) ◽  
pp. 47
Author(s):  
Emmet J. Judziewicz ◽  
Paul M. Peterson
Keyword(s):  
South American ◽  
South American Species

The Leishmania promastigote surface antigen 2 complex is differentially expressed during the parasite life cycle

1995 ◽  
Vol 74 (2) ◽  
pp. 189-200 ◽  
Author(s):  
Emanuela Handman ◽  
Amelia H. Osborn ◽  
Fiona Symons ◽  
Rosemary van Driel ◽  
Roberto Cappai
Keyword(s):  
Life Cycle ◽  
Surface Antigen ◽  
Differentially Expressed ◽  
Parasite Life Cycle

scholarly journals Flagellar Motility ofTrypanosoma cruziEpimastigotes

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
G. Ballesteros-Rodea ◽  
M. Santillán ◽  
S. Martínez-Calvillo ◽  
R. Manning-Cela
Keyword(s):  
Life Cycle ◽  
Trypanosoma Cruzi ◽  
Quantitative Description ◽  
Flagellar Motility ◽  
Parasite Life Cycle ◽  
Large Variability ◽  
Rotational Angle ◽  
Ciliary Beating ◽  
Parasite Motility ◽  
Parasite Behavior

The hemoflagellateTrypanosoma cruziis the causative agent of American trypanosomiasis. Despite the importance of motility in the parasite life cycle, little is known aboutT. cruzimotility, and there is no quantitative description of its flagellar beating. Using video microscopy and quantitative vectorial analysis of epimastigote trajectories, we find a forward parasite motility defined by tip-to-base symmetrical flagellar beats. This motion is occasionally interrupted by base-to-tip highly asymmetric beats, which represent the ciliary beat of trypanosomatid flagella. The switch between flagellar and ciliary beating facilitates the parasite's reorientation, which produces a large variability of movement and trajectories that results in different distance ranges traveled by the cells. An analysis of the distance, speed, and rotational angle indicates that epimastigote movement is not completely random, and the phenomenon is highly dependent on the parasite behavior and is characterized by directed and tumbling parasite motion as well as their combination, resulting in the alternation of rectilinear and intricate motility paths.

Sign in / Sign up

Export Citation Format

Share Document