Helminth community structure and pattern in sympatric populations of black-bellied and fulvous whistling-ducks

1996 ◽  
Vol 74 (12) ◽  
pp. 2219-2225 ◽  
Author(s):  
Alan M. Fedynich ◽  
Danny B. Pence ◽  
James F. Bergan
Keyword(s):  
Community Structure ◽  
Feeding Behavior ◽  
Host Species ◽  
Common Species ◽  
South Texas ◽  
Helminth Species ◽  
Helminth Community ◽  
Sympatric Populations ◽  
Duck Species ◽  
Species Population

Helminth communities of 25 black-bellied (Dendrocygna autumnalis) and 25 fulvous (Dendrocygna bicolor) whistling-ducks from south Texas varied in composition, prevalence, dominance, and abundance. Twenty-eight helminth species were found, of which 20 occurred in each host species population. Twelve species co-occurred between host populations. Black-bellied and fulvous whistling-ducks averaged 3.0 ± 0.3 (SE) and 5.0 ± 0.4 species, respectively. Fifteen common species were found, of which 8 and 11 species commonly occurred in black-bellied and fulvous whistling-ducks, respectively. Four species (Apatemon gracilis, Tanaisia bragai, Sobolevicanthus gracilis, and Epomidiostomum uncinatum) were common in both host species. Prevalences varied in 4 of 8 helminth species co-occurring in both host species; 3 helminth species had higher prevalences in fulvous whistling-ducks. Black-bellied and fulvous whistling-ducks averaged 7.8 ± 1.4 and 44.8 ± 11.9 helminth individuals, respectively. Eleven of 15 common helminth species varied in abundance between host species populations; 4 species had higher abundances in black-bellied whistling-ducks and 7 had higher abundances in fulvous whistling-ducks. Our results suggest that although these duck species are sympatric, differences in feeding behavior may be most important in determining helminth community structure and pattern.

scholarly journals Helminth Community Dynamics in Populations of Blue-Winged Teal (Anas discors) Using Two Distinct Migratory Corridors

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Jason M. Garvon ◽  
Alan M. Fedynich ◽  
Markus J. Peterson ◽  
Danny B. Pence
Keyword(s):  
Species Richness ◽  
Host Species ◽  
Community Dynamics ◽  
Helminth Species ◽  
Avian Host ◽  
Helminth Community ◽  
Intermediate Species ◽  
Anas Discors ◽  
Isolating Mechanisms ◽  
Migratory Corridor

The influence of spatially distinct host subpopulations on helminth community structure and pattern was examined in a migratory avian host species. Forty helminth species represented by 24,082 individuals were collected from 184 blue-winged teal (Anas discors; BWT) from 2 primary migratory corridors in Florida (eastern migratory corridor; EMC) and Louisiana and Texas (western migratory corridor; WMC). Mean species richness was greater in BWT from the WMC (x¯±S.E=10.2 ± 0.3species) than the EMC (8.6 ± 0.2). The helminth community from the WMC had higher abundances of 6 common/intermediate species. Corridor helminth communities were similar in species composition but less similar when incorporating abundances of those species. Overlapping distributions of phylogenetically related host species that share generalist helminth species across ecologically similar habitats seem to mitigate the isolating mechanisms that are necessary for the distinct coevolutionary pathways to develop between adjacent corridors.

scholarly journals Helminth Parasite Communities of Two Scorpaena spp. (Scorpaenidae) From Reefs of Veracruz, Mexico

2018 ◽  
Vol 10 (9) ◽  
pp. 504
Author(s):  
Jesús Montoya-Mendoza ◽  
Sandra Edith Badillo-López ◽  
Isabel Araceli Amaro-Espejo ◽  
María del Refugio Castañeda-Chávez ◽  
Fabiola Lango-Reynoso ◽  
...  
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
National Park ◽  
Common Species ◽  
Shannon Index ◽  
Marine Fishes ◽  
Helminth Community ◽  
Component Community ◽  
Parasite Communities ◽  
Southern Gulf Of Mexico

Scorpaena brasiliensis and S. plumieri are relevant fish species in reef systems, but little is known about their parasitic helminth communities and their structure. This paper describes such community in terms of species richness and diversity. A helminthological study was conducted on 33 specimens of S. brasiliensis and 36 S. plumieri, captured in the Pajaros and Cabezo Reefs, in the Veracruz Reef System National Park (VRSNP), Veracruz, Mexico. The helminth community structure was analyzed in both host species. A total of 10 parasitic species was registered in S. brasiliensis (5 digeneans, 1 cestode, 3 nematodes, 1 acanthocephalan), while S. plumieri hosted 11 species (4 digeneans, 1 monogenean, 1 cestode, 4 nematodes, 1 acanthocephalan), with 8 common species. The species with the highest prevalence were Pseudocapillaria (Icthyocapillaria) sp., with 18.2% and 19.4% in S. brasiliensis and S. plumieri, respectively. Component community richness for S. brasiliensis was S = 10, with Shannon index diversity value of H’ = 2.08. For S. plumieri, such values were of S = 11 and H’ = 1.91. Richness and diversity in the component and infracommunity levels for both hosts are lower than in other parasite communities of marine fishes in the southern Gulf of Mexico.

Variation in the helminth community structure ofThrichomys pachyurus(Rodentia: Echimyidae) in two sub-regions of the Brazilian Pantanal: the effects of land use and seasonality

2009 ◽  
Vol 84 (3) ◽  
pp. 266-275 ◽  
Author(s):  
R. Simões ◽  
R. Gentile ◽  
V. Rademaker ◽  
P. D'Andrea ◽  
H. Herrera ◽  
...  
Keyword(s):  
Land Use ◽  
Community Structure ◽  
Helminth Species ◽  
Population Increase ◽  
Helminth Community ◽  
Wet Season ◽  
In The Wild ◽  
Highly Correlated ◽  
Seasonally Flooded ◽  
Brazilian Pantanal

AbstractThe Pantanal is a large ecosystem located in South America. This preserved area is seasonally flooded due to abundant rainfall during the summer and the subsequent overflow of the Paraguai River. In this paper, we examine the helminth community structure in the wild rodentThrichomys pachyurusduring the wet and dry seasons in two locations of the preserved and cattle ranching areas in the Southern Pantanal. We identified 12 species of helminth, and, although we did not find any differences in species richness between locations within the Pantanal, we found that richness was higher during the wet season. Helminth species were largely aggregated in both farm locations and during seasons. The most common helminth species were more abundant during the dry season than during the wet season, which may have been due to the increased habitat availability and rodent population increase. The intensity of the infection also followed the same pattern for most helminths. The trichostrongylids (Heligmostrongylus crucifer,H. almeidaiandPudica cercomysi) were dominant at both farm locations. The land use of each area was not correlated with helminth diversity. However, species composition of the helminth community ofT. pachyurusdiffered between locations and may be correlated with environmental differences between the habitats. The seasonality of the Pantanal was highly correlated with helminth parasitism inT. pachyurus.

Biotic and abiotic effects on the intestinal helminth community of the brown ratRattus norvegicusfrom Rio de Janeiro, Brazil

2014 ◽  
Vol 90 (1) ◽  
pp. 21-27 ◽  
Author(s):  
R.O. Simões ◽  
J.L. Luque ◽  
R. Gentile ◽  
M.C.S. Rosa ◽  
S. Costa-Neto ◽  
...  
Keyword(s):  
Community Structure ◽  
Rio De Janeiro ◽  
Abundant Species ◽  
Helminth Species ◽  
Intestinal Helminth ◽  
Nippostrongylus Brasiliensis ◽  
Helminth Community ◽  
Public Health Importance ◽  
Strongyloides Venezuelensis ◽  
Moniliformis Moniliformis

AbstractRattus norvegicushas attracted much attention because of its role as a reservoir of zoonotic pathogens. This work aimed to identify the intestinal helminth species inR. norvegicusand to analyse the effects of temperature, rainfall, host age and sex on the helminth community structure. Moreover, this study investigated the possible associations among helminth species in an urban population ofR. norvegicusin São Gonçalo, Rio de Janeiro, sampled during the rainy and dry seasons over a span of 2 years. A total of 112 rats were infected by six species of helminths. The nematodeNippostrongylus brasiliensiswas the most prevalent and abundant species, with high mean intensity in both seasons, followed byStrongyloides venezuelensis,Heterakis spumosa,Raillietinasp.,Hymenolepis nanaandMoniliformis moniliformis.Co-occurrence was found betweenN. brasiliensisandS. venezuelensisand betweenN. brasiliensisandH. spumosa.The occurrence ofS. venezuelensiswas related to rainfall. The understanding of the helminth community structure in this synanthropic rat provides basic information on parasites of public health importance, as two helminth species (H. nanaandM. moniliformis) recovered from rats in the urban area studied can infect humans.

scholarly journals Helminth Parasites of Scorpaena brasiliensis and S. plumieri (Perciformes: Scorpaenidae) from reefs of Veracruz, Mexico, Southern Gulf of Mexico

2018 ◽  
Author(s):  
Jesus Montoya-Mendoza ◽  
Sandra Edith Badillo-López ◽  
Isabel Araceli Amaro-Espejo ◽  
María del Refugio Castañeda-Chávez ◽  
Fabiola Lango-Reynoso ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Parasite Community ◽  
Common Species ◽  
Shannon Index ◽  
Helminth Parasites ◽  
Helminth Community ◽  
Parasitic Helminths ◽  
Southern Gulf Of Mexico ◽  
Community Component

Both S. brasiliensis and S. plumieri are relevant species in reef systems, but little is known about their parasitic helminths and community structure. This work describes such community in terms of species richness and diversity. A helminthological study was conducted on 33 specimens of S. brasiliensis and 36 of S. plumieri, captured in the Pájaros and Cabezo Reefs, in the Veracruz Reef System National Park (VRSNP), Ver., Mexico. The helminth community structure was analyzed in both hosts. A total of 10 parasitic species was registered for S. brasiliensis (trematodes, 5; nematodes, 3; cestodes, 1; acanthocephals, 1). S. plumieri hosted 11 species (trematodes, 4; nematodes, 4; monogeneans, 1; cestodes, 1; acanthocephals, 1), with 8 common species. Overall, parasites had prevalences < 20%, as Pseudocapillaria (Icthyocapillaria) sp., with 18.2% and 19.4% in S. brasiliensis and S. plumieri, respectively. Community component richness for S. brasiliensis was S=10, with Shannon index diversity value of H’=2.08. For S. plumieri, such values were of S=11 and H’=1.91. The richness and diversity in the components community and infracommunity of parasitic helminths for both hosts are lower than in other parasite community of marine fish Southern Gulf of Mexico.

Helminth community structure in Rattus leucopus (Gray) (Muridae) from Australia, Papua New Guinea and Papua

2004 ◽  
Vol 52 (3) ◽  
pp. 283 ◽  
Author(s):  
L. R. Smales ◽  
D. M. Spratt
Keyword(s):  
Community Structure ◽  
Papua New Guinea ◽  
Parasite Species ◽  
New Guinea ◽  
Helminth Species ◽  
Helminth Community ◽  
Time Intervals ◽  
Host Genus ◽  
Irian Jaya ◽  
Nematode Larvae

This study describes the helminth community in 28 Rattus leucopus, from Australia, Papua New Guinea and Papua (formerly Irian Jaya), and compares the community in Australian R. leucopus with those known from two other Australian endemics, R. sordidus and R. fuscipes. In total, 28 parasite species were found: one acanthocephalan, five cestodes, one trematode and 21 nematodes as well as two lots of unidentified spirurid nematode larvae. The diversity of helminths in R. leucopus was high but equitable; the reciprocal of Simpson's Index was 1.75. The distribution of prevalence of helminth species was not indicative of a core-satellite structure. No species occurred at a prevalence >30% and more than half the species occurred at prevalences of <10%. Only 10% of the helminth species identified were unique to R. leucopus. Helminth community structure in R. leucopus differed from that observed in R. sordidus and the community in R. fuscipes was markedly different from those in R. leucopus and R. sordidus. Determinants of the diversity of the helminth community in R. leucopus include the time intervals between the three waves of migration of Rattus spp. to Australia, biogeographic factors related to immigration and adaptive radiation of the host genus, and associated with coevolution, speciation and host switching of the helminths.

scholarly journals Helminth diversity in Pimelodus blochii Valenciennes, 1840 (Osteichthyes: Pimelodidae) in two Amazon Rivers

2020 ◽  
Vol 119 (12) ◽  
pp. 4005-4015
Author(s):  
Pedro Hercílio de Oliveira Cavalcante ◽  
Maralina Torres da Silva ◽  
Aldenice de Nazaré Silva Pereira ◽  
Rosana Gentile ◽  
Cláudia Portes Santos
Keyword(s):  
Community Structure ◽  
Parasite Community ◽  
Helminth Species ◽  
Helminth Parasites ◽  
Population Parameters ◽  
Helminth Community ◽  
Environmental Characteristics

AbstractStructure of the helminth community and analyses of helminth population parameters of Pimelodus blochii collected in the Xapuri River in comparison with those in the Acre River were evaluated. Eight adult helminth species were found parasitizing P. blochii in the Acre River: the nematodes Orientatractis moraveci, Rondonia rondoni, Philometroides acreanensis, Cucullanus (Cucculanus) pinai pinai, Procamallanus (Spirocamallanus) pimelodus, Rhadochona acuminata, and Brasilnema sp., and the trematode Dadaytrema oxycephala. For Xapuri’s fishes, nine helminth species were found: the nematodes O. moraveci, R. rondoni, C. (C.) pinai pinai, Procamallanus (Spirocamallanus) rarus, P. (S.) pimelodus, R. acuminata, Brasilnema sp., and Cystidicolidae gen. sp., and the trematode D. oxycephala. Nematode and Acanthocephala larvae were also reported. Helminth abundance, prevalence, and diversity were influenced by seasonality and locality (river). The helminth parasites from Acre’s fishes formed a subset of the helminth community of the Xapuri’s. The results indicate an influence of the environmental characteristics of the rivers on the helminth community structure and diversity. This is the first study of the parasite community of P. blochii in the Xapuri River. The paretheses of (Spirocamallanus) and (S.) should not be in italics all along the text and tables.

scholarly journals Helminth Parasites of Scorpaena brasiliensis and S. plumieri (Perciformes: Scorpaenidae) from reefs of Veracruz, Mexico, Southern Gulf of Mexico

2018 ◽  
Author(s):  
Jesus Montoya-Mendoza ◽  
Sandra Edith Badillo-López ◽  
Isabel Araceli Amaro-Espejo ◽  
María del Refugio Castañeda-Chávez ◽  
Fabiola Lango-Reynoso ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Parasite Community ◽  
Common Species ◽  
Shannon Index ◽  
Helminth Parasites ◽  
Helminth Community ◽  
Parasitic Helminths ◽  
Southern Gulf Of Mexico ◽  
Community Component

Both S. brasiliensis and S. plumieri are relevant species in reef systems, but little is known about their parasitic helminths and community structure. This work describes such community in terms of species richness and diversity. A helminthological study was conducted on 33 specimens of S. brasiliensis and 36 of S. plumieri, captured in the Pájaros and Cabezo Reefs, in the Veracruz Reef System National Park (VRSNP), Ver., Mexico. The helminth community structure was analyzed in both hosts. A total of 10 parasitic species was registered for S. brasiliensis (trematodes, 5; nematodes, 3; cestodes, 1; acanthocephals, 1). S. plumieri hosted 11 species (trematodes, 4; nematodes, 4; monogeneans, 1; cestodes, 1; acanthocephals, 1), with 8 common species. Overall, parasites had prevalences < 20%, as Pseudocapillaria (Icthyocapillaria) sp., with 18.2% and 19.4% in S. brasiliensis and S. plumieri, respectively. Community component richness for S. brasiliensis was S=10, with Shannon index diversity value of H’=2.08. For S. plumieri, such values were of S=11 and H’=1.91. The richness and diversity in the components community and infracommunity of parasitic helminths for both hosts are lower than in other parasite community of marine fish Southern Gulf of Mexico.

scholarly journals Diversity and Community Structure of Oribatid Mites (Acari, Oribatei) at Memorial Complexes of a Megapolis

2013 ◽  
Vol 47 (4) ◽  
pp. 291-297
Author(s):  
L. A. Kolodochka ◽  
O. S. Shevchenko
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Species Complex ◽  
Common Species ◽  
Oribatid Mites ◽  
Direct Relation ◽  
City Center ◽  
Degree Of Dominance ◽  
Different Types ◽  
The City

Abstract In different types of substrate (soil, litter, lichens and mosses) collected at three memorial complexes (cemeteries) of Kyiv (Ukraine), 70 species from 57 genera, 34 families of oribatid mites were found. A few eurytopic species capable of tolerance to different types of pollution make up an essential part in each species complex. The species diversity and complexity of oribatid community structure at researched areas increased with distance from the city center. There was no direct relation between the degree of dominance of most common species and the cemetery’s relative remoteness from the center of the city.

scholarly journals Helminth community structure in two species of arctic-breeding waterfowl

2016 ◽  
Vol 5 (3) ◽  
pp. 263-272 ◽  
Author(s):  
C.L. Amundson ◽  
N.J. Traub ◽  
A.J. Smith-Herron ◽  
P.L. Flint
Keyword(s):  
Community Structure ◽  
Helminth Community ◽  
Breeding Waterfowl
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