scholarly journals A Bayesian analysis of the parasitic ecology in Jenynsia multidentata(Pisces: Anablepidae)

2017 ◽  
Vol 107 (0) ◽  
Author(s):  
Martin M. Montes ◽  
Sergio R. Martorelli
Keyword(s):  
New Records ◽  
Parasite Community ◽  
Age Classes ◽  
Eutrophic Lakes ◽  
Larval Stages ◽  
Viviparous Fish ◽  
Key Species ◽  
Parasite Biodiversity ◽  
The City ◽  
Jenynsia Multidentata

ABSTRACT Jenynsia multidentata Jenyns, 1842 (one-sided livebearers) are euryhaline viviparous fish of small size, used in the laboratory experiment, important as resource for biological control of mosquito’s larva and a key species to recover eutrophic lakes. Works have been published dealing with parasite biodiversity of this host, but little has been studied about the parasite community ecology. From early 2009 to ends of 2010 specimens of J. multidentata were collected from two places, the Salado Relief Channel (S.R.C.) on Samborombón Bay and the Sauce Chico River near to the city of Bahia Blanca (B.B.). All fish were sexed, measured and grouped into sizes/age classes. The fishes from both sites harbored 16 parasitic species: nine digenean, one monogenean, one metacestode, one acanthocephalan, two nematode and two copepods. Lecithaster confusus Odhner, 1905, the metacercariae Hemiuridae gen. sp. indet., metacercariae Thylodelphys sp. (inside the eye), Glossocercus sp. nematode L4 (intestine) and Ergasilus sieboldii Nordmann, 1832 are new records for the host. The high number of larval stages made of this fish a link between micro and macroecosystems. The size 2 had the higher biodiversity in both sites, which could be the most suitable age to store the maximal number of parasite of the environment and have a more equitability in their distribution on the host. In B.B. some parasites had higher prevalence and mean abun dance due to the small size of the waterbody compared with the S.R.C. Despite that, in S.R.C. exist a higher specific richness and biodiversity due the daily flow of saline and freshwater and proximity of the sample site to the mouth of the channel in the bay. This is the first approximation to an analysis of the parasitic ecology on this host.

The distribution of phytoplankton along trophic gradients and its mediation by available light in the pelagic zone of large eutrophic lakes

2012 ◽  
Vol 69 (12) ◽  
pp. 1935-1946 ◽  
Author(s):  
Min Zhang ◽  
Yang Yu ◽  
Zhen Yang ◽  
Xiaoli Shi ◽  
Fanxiang Kong
Keyword(s):  
Lake Management ◽  
Pelagic Zone ◽  
Light Limitation ◽  
Eutrophic Lakes ◽  
Large Lakes ◽  
Factors Affecting ◽  
Key Species ◽  
Principal Factors ◽  
The Mean ◽  
Taxonomic Groups

We describe the pattern and the principal factors affecting the phytoplankton biomass–nutrient relationship in the pelagic zone of large lakes. The results showed that the phytoplankton abundance and biomass of Cyanophyta, Cryptophyta, and Pyrrophyta were significantly correlated with trophic states. The total phosphorus (TP)–biomass relationship curves showed that the increment of biomass with TP is weak at high TP levels. The decrease in biomass at the high end of the curves might be a synthesis of the pattern of responses of the major taxonomic groups (except cyanobacteria) to environmental variables. Light limitation might be one of the important factors causing the decrease in the TP–biomass curve at high TP concentrations. If the mean underwater available light is lower than ∼250 µmol photons·m–2·s–1, clear-water species decline and cyanobacteria become dominant. The responses to available light of these key species play a central role in modulating the biomass–nutrient relationship. Our results contribute to the understanding of this relationship in the pelagic zone of large eutrophic lakes and have important practical implications for lake management.

scholarly journals A contribution to the checklist of fishes of San Luis province, Argentina

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1760 ◽  
Author(s):  
Yamila P. Cardoso ◽  
Sergio Bogan ◽  
Juan M. Meluso ◽  
Adrián Jáuregui ◽  
María B. Cabrera ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
New Records ◽  
Fish Fauna ◽  
Fish Distribution ◽  
San Luis ◽  
First Time ◽  
Jenynsia Multidentata

San Luis province presents arheic and endorheic basins that are poorly understood in terms of their ichthyological composition. The samples taken recently from the main basins of this province have yielded data of undisputed biogeographic value for the knowledge of the ichthyofauna of San Luis, as well as for drawing up lists of species for watersheds with poor or absent previous records. Here, we cite Jenynsia multidentata from the Desaguadero and Bebedero rivers, Cnesterodon decemmaculatus for Chorrillos River, and Oligosarcus jenynsii for Luján, Quines and Quinto rivers. We add five taxa to the Nogolí River that have not been previously reported. We also present for the first time a list of the fish fauna from the Conlara, Luján and Quines basins. Our results provide 34 new records of freshwater fish distribution.

Life stage descriptions, taxonomic notes, and new records for the mayfly family Leptohyphidae (Ephemeroptera)

Zootaxa ◽  
2003 ◽  
Vol 332 (1) ◽  
pp. 1 ◽  
Author(s):  
DAVID E. BAUMGARDNER ◽  
STEVEN K. BURIAN ◽  
DAVID BASS
Keyword(s):  
United States ◽  
Central America ◽  
New Records ◽  
Life Stage ◽  
Caribbean Region ◽  
Larval Stages ◽  
Caribbean Islands ◽  
Ecological Region ◽  
The Caribbean ◽  
First Time

The larval stages of Tricorythodes fictus Traver, T. cobbi Alba-Tercedor and Flannagan, and T. mosegus Alba-Tercedor and Flannagan are described for the first time based upon reared specimens. The rarely reported Asioplax dolani (Allen) is newly documented from the Austroriparian ecological region of Texas. Leptohyphes zalope Traver, known from the southwestern United States and much of Central America, is newly documented from the Caribbean Islands of Grenada and Tobago. This represents only the second leptohyphid mayfly known from both Continental America and the Caribbean region. Additional Caribbean records of Allenhyphes flinti (Allen) are also given.

Diversity of metazoan parasites of the introduced oyster species Crassostrea gigas in the Exe Estuary

1999 ◽  
Vol 79 (1) ◽  
pp. 57-63 ◽  
Author(s):  
M.L. Aguirre-Macedo ◽  
C.R. Kennedy
Keyword(s):  
Crassostrea Gigas ◽  
Parasite Community ◽  
Community Diversity ◽  
Age Group ◽  
Host Age ◽  
Age Classes ◽  
Metazoan Parasites ◽  
Metazoan Parasite ◽  
Individual Host ◽  
One Year

Temporal patterns in metazoan parasite community diversity of Crassostrea gigas, (Lamellibranchia: Ostreidae) were studied in the Exe Estuary at monthly intervals over one year and in relation to host age-classes. A total of four metazoan species was found to parasitize C. gigas in the Exe Estuary: the turbellarian Paravortex sp., cercaria Lepocreadiidae, metacercariae of Renicola roscovita and the copepod Mytilicola intestinalis. Only R. roscovita and M. intestinalis were present in all months throughout the year and in all host age-classes. Analysis of the metazoan parasite community at individual host level revealed little variation in community structure with respect to season or host age, as only a slight increase in diversity values was observed during the summer months. However, community diversity does vary from year to year, as shown by comparison between host age group samples in three consecutive years. None of the parasites are specialist to oysters but all appear to be widespread and abundant parasite of other lamellibranch species.

scholarly journals New records of the striped cleaner shrimp Lysmata grabhami (Gordon, 1935) from Brazil, Southwestern Atlantic

2015 ◽  
Vol 75 (4) ◽  
pp. 936-939 ◽  
Author(s):  
A. D. Kassuga ◽  
K. Diele ◽  
M. Hostim-Silva
Keyword(s):  
Coastal Waters ◽  
New Records ◽  
Scuba Diving ◽  
Southwestern Atlantic ◽  
Espírito Santo ◽  
Trindade Island ◽  
Espirito Santo ◽  
The City ◽  
Cleaner Shrimp

Abstract New records for Lysmata grabhami (Gordon, 1935) in Brazilian waters are presented. Four adult individuals from coastal waters off the city of Vitória, Espírito Santo coast and one adult from Trindade Island were collected during scuba diving in depths between 20-40 meters. These two records represent the southernmost published finding of this species in the Atlantic and the record for Vitória, Espirito Santo is the first from Brazilian coastal waters.

scholarly journals Spatial distribution of enteroparasites among school children from Guarapuava, State of Paraná, Brazil

2007 ◽  
Vol 10 (4) ◽  
pp. 568-578 ◽  
Author(s):  
Maria Luisa Tunes Buschini ◽  
Elaine Pittner ◽  
Tiago Czervinski ◽  
Ivonete de Fátima Moraes ◽  
Mônica Monteiro Moreira ◽  
...  
Keyword(s):  
Intestinal Parasites ◽  
Giardia Duodenalis ◽  
Parasite Community ◽  
Diversity Indices ◽  
Community Schools ◽  
Deficiency Anemia ◽  
Health Issues ◽  
Human Beings ◽  
Poor Absorption ◽  
The City

The most common infections in human beings are caused by intestinal parasites. They can lead to a number of harmful effects, which could include, among others, intestinal obstruction, malnutrition, iron deficiency anemia, diarrhea, and poor absorption. In Brazil, enteroparasites are one of the main public health issues. The present study aims at analyzing the distribution and frequency of enteroparasite occurrence in 635 children from seven community schools in the city of Guarapuava, Paraná (PR). In addition, we used similarity and diversity indices to analyze the parasite community. We found 475 samples with at least one parasite showing that 75.27% of children had enteroparasites. A smaller fraction (26.73%) of children harbored several parasites (multiparasitism), especially Giardia duodenalis (56%), and Ascaris lumbricoides (18%). Statistical analysis showed that three (out of seven) children communities had higher similarity in frequency and amount of parasites. Our results suggest that the children studied were highly infected by enteroparasites. These levels of infestation could be related to several factors, such as climate, social and economic conditions and characteristics of the parasites.

scholarly journals Is new spread of the European beaver in Pannonian basin an evidence of the species recovery?

2016 ◽  
Vol 2 (2) ◽  
pp. 44-63 ◽  
Author(s):  
Alexander Čanády ◽  
Peter Krišovský ◽  
Bálint Bajomi ◽  
Attila Huber ◽  
Dávid Czabán ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
New Records ◽  
Pannonian Basin ◽  
European Beaver ◽  
Potential Population ◽  
The City ◽  
Important Evidence ◽  
Exact Origin ◽  
Different Origin

Abstract Abstract: During fieldwork from 6 June to 20 July 2016, the first records of the European beaver (Castor fiber) in south-eastern Slovakia were made. Beavers are mainly nocturnal animals, and as such, they are rarely observed; therefore, our observations were based on searching for beaver presence signs: damaged trees, dams, signs of food consumption (chewed/felled trees) and footprints in the mud. The southern part of the Košická kotlina basin, from the city of Košice down to the state border and the surrounding villages in Hungary, was checked. We found two beaver locations via feeding signs in the vicinity of the Slovakia–Hungary state border, at the villages of Milhosť (Miglécnémeti) and Buzica (Buzita), in Slovakia. According to our calculations, the present total beaver population in Hungary is between 4,000 and 5,000 and 14,600–18,300 beavers with potential support. For Slovakia, we estimated the potential population size to be 7,700–9,600. Our findings in northern Pannonian lowland (Slovakia–Hungary border) are an important evidence of beaver expansion. Although we don’t know the exact origin of investigated population, these new records indicate the possibility of merging the populations of different origin, which could enable gene flow and increase the genetic diversity. This could lead to improved recovery of species and its stabilisation in nature. However, it is necessary to carry out a detailed investigation of the presence of beaver in these regions in future.

scholarly journals Halfway up the trophic chain: development of parasite communities in the sparid fish Boops boops

Parasitology ◽  
2007 ◽  
Vol 135 (2) ◽  
pp. 257-268 ◽  
Author(s):  
A. PÉREZ-DEL OLMO ◽  
M. FERNÁNDEZ ◽  
J. A. RAGA ◽  
A. KOSTADINOVA ◽  
R. POULIN
Keyword(s):  
Community Structure ◽  
Species Abundance ◽  
Parasite Community ◽  
Life Cycles ◽  
Trophic Chain ◽  
Age Cohorts ◽  
Parasite Communities ◽  
Sparid Fish ◽  
Key Species ◽  
Boops Boops

SUMMARYWe examined the patterns of composition and structure of parasite communities in the Mediterranean sparid fish Boops boops along a gradient of fish sizes, using a large sample from a single population. We tested the hypothesis that species forming the core of the bogue parasite fauna (i.e. species which have a wide geographical range and are responsible for recognizable community structure) appear early in the fish ontogeny. The sequential community development observed supported the prediction that core species appear in the fish population earlier than rare and stochastic species. There was also a strong correlation between the order of ‘arrival’ of the species and their overall prevalence. Six key species were responsible for recognizable community structure across size/age cohorts; the addition to this baseline community of key parasite species resulted in a nested structure that is linked to differential species abundance rather than fish size. Information on the life-cycles, distribution and host range of the parasites is used to explain the observed patterns of parasite community structure. We conclude that the small mouth size of B. boops coupled with suction feeding may provide a setting for passive sampling as a mechanism leading to non-random parasite community structure.

scholarly journals New records of the exotic Band-eyed Drone Fly, Eristalinus taeniops (Wiedemann, 1818) (Diptera, Syrphidae), in Argentina

Check List ◽  
2020 ◽  
Vol 16 (6) ◽  
pp. 1523-1529
Author(s):  
Bruno Ariel Rossi Rotondi ◽  
Martín Videla ◽  
Hernán Mario Beccacece ◽  
María Silvina Fenoglio
Keyword(s):  
Citizen Science ◽  
Geographic Distribution ◽  
Current Distribution ◽  
Scientific Literature ◽  
New Records ◽  
Old World ◽  
Central Argentina ◽  
The City

Eristalinus (Eristalodes) taeniops (Wiedemann, 1818) is a pollinator hoverfly native to the Old World that has spread through several countries in America. We determine the current distribution of this species in Argentina by using records from scientific literature and citizen science websites. In addition, we report the first three specimens collected in Córdoba province. Eristalinus taeniops is present in 10 provinces in Argentina and seems to be more frequent in anthropized habitats. Likewise, the specimens we collected were exclusively captured within the city of Córdoba. Our results confirm the occurrence of E. taeniops in central Argentina and contribute to determining the actual geographic distribution of this species in the country. Our new data could help to evaluate the potential invasiveness of E. taeniops in ecosystems.

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