scholarly journals TERMITES OF THE MARAJÓ ISLAND, STATE OF PARÁ, BRAZIL: COMPOSITION, HABITAT, FEEDING GROUPS AND NESTS

2021 ◽  
pp. 82-88
Author(s):  
Maria Lucia Jardim Macambira
Keyword(s):  
Feeding Groups ◽  
Island State ◽  
Marajó Island

scholarly journals Tectonic control on the stratigraphic framework of Late Pleistocene and Holocene deposits in Marajó Island, State of Pará, eastern Amazonia

2010 ◽  
Vol 82 (2) ◽  
pp. 439-449 ◽  
Author(s):  
Dilce F. Rossetti
Keyword(s):  
Late Quaternary ◽  
Fault Reactivation ◽  
Passive Margin ◽  
Stratigraphic Correlation ◽  
Sedimentary Records ◽  
Stratigraphic Framework ◽  
Island State ◽  
Marajó Island ◽  
Northern Brazil

The traditional view that the Brazilian Amazonia is located in a tectonically stable area since the Cretaceous is changing in front of the increasing documentation of fault reactivations even during the Holocene. How the sedimentary record has responded to these events is an issue that remains to be approached with basis on field data. This work focuses on the stratigraphic correlation of late Quaternary deposits from eastern Marajó Island, with the goal of demonstrating the role of fault reactivation on the origin and preservation of these deposits. Despite the location in a stable platform of a continental passive margin, three studied stratigraphic units display significant vertical offsets that define two depocenters that are better explained through tectonic displacements. This interpretation is reinforced by several morphostructural features related to faults that occur between the studied drills. Without the influence of tectonics, sediment preservation in this characteristically low-lying terrain would have been negligible. The results of the present work motivate to look for other tectonically-influenced areas in Amazonia, which similarly might have acted as sites for sediment accommodation during the late Quaternary. These sedimentary records have great potential to be the source of valuable information for reconstructing Quaternary geological events in Northern Brazil.

scholarly journals Nematodes in Hoplerytrinus unitaeniatus, Hoplias malabaricus and Pygocentrus nattereri (pisces characiformes) in Marajó Island, Brazil

2012 ◽  
Vol 21 (2) ◽  
pp. 165-170 ◽  
Author(s):  
Raimundo Nonato Moraes Benigno ◽  
Sérgio Carmona de São Clemente ◽  
Edilson Rodrigues Matos ◽  
Roberto Magalhães Pinto ◽  
Delir Corrêa Gomes ◽  
...  
Keyword(s):  
Zoonotic Potential ◽  
Mean Intensity ◽  
Hoplias Malabaricus ◽  
Health Authorities ◽  
Island State ◽  
High Prevalence ◽  
Marajó Island ◽  
Pygocentrus Nattereri

The aim of this study was to evaluate the tegument, musculature and mesentery of 102 specimens of Hoplerytrinus unitaeniatus, 104 of Hoplias malabaricus and 101 of Pygocentrus nattereri, from Arari Lake, Marajó Island, State of Pará, Brazil. Were identified the nematodes Contracaecum sp., Eustrongylides sp. and Procamallanus sp. Contracaecum sp. was the most prevalent, with rates of 84.31% (H. unitaeniatus), 95.19% (H. malabaricus), and 89.11% (P. nattereri). The highest prevalences of Eustrongylides sp. occurred in H. unitaeniatus (56.86%) and H. malabaricus (53.84%). Procamallanus sp. was only collected in the mesentery. Specimens of Eustrongylides sp. collected from the musculature were 91.9% of its population. Among the nematodes found in the mesentery, 98.34% were Contracaecum sp. with a mean intensity (MI) of 7.92 ± 8.11 (H. unitaeniatus), 8.49 ± 8.34 (H. malabaricus) and 7 ± 6.40 (P. nattereri). Contracaecum sp. presented the highest MI (8.49 ± 8.34) and mean abundance (8.09 ± 8.34). The highest MI values were observed in the mesentery. Eustrongylides sp. presented MI of 2.65 ± 3.21 (H. unitaeniatus), 3.41 ± 3.27 (H. malabaricus) and 2.17 ± 1.18 (P. nattereri). Nematodes with zoonotic potential that were found with high prevalence, shows the importance of actions by the health authorities.

scholarly journals First report of Anisakis sp. (Nematoda: Anisakidae) parasitizing Muscovy duck in Marajó Island, state of Pará, Brazil

2020 ◽  
Vol 29 (2) ◽  
Author(s):  
Elaine Lopes de Carvalho ◽  
Ricardo Luis Sousa Santana ◽  
Evonnildo Costa Gonçalves ◽  
Raul Henrique da Silva Pinheiro ◽  
Elane Guerreiro Giese
Keyword(s):  
Climatic Conditions ◽  
Human Consumption ◽  
Esophageal Mucosa ◽  
Muscovy Duck ◽  
Cairina Moschata ◽  
Island State ◽  
Third Stage ◽  
Marajó Island ◽  
Northern Brazil ◽  
Muscovy Ducks

Abstract Among the avian used for human consumption, the Muscovy duck is well adapted to various climatic conditions and its breeding is widespread due to its easy handling, and its meat is widely consumed and appreciated, especially in the cuisine of northern Brazil. The present study aimed to report and identify taxonomically the nematodes found in the esophagus of Muscovy ducks reared and marketed in the municipality of Soure, Marajó Island, state of Pará, Brazil, and discuss its zoonotic potential to human. The samples consisted of 30 specimens of Cairina moschata domestica analyzed. A total of 258 nematodes were recovered, which were strongly fixed in the esophageal mucosa of hosts. The morphological and morphometric characteristics were compatible with Anisakis third-stage larvae.

scholarly journals Molecular characterization of progenies of bacurizeiro ( Platonia insignis ) from Marajó Island, northeastern Amazon

2017 ◽  
Vol 47 (4) ◽  
pp. 293-300 ◽  
Author(s):  
Lígia Cristine Gonçalves PONTES ◽  
Elisa Ferreira MOURA ◽  
Mônika Fecury MOURA ◽  
Simone de Miranda RODRIGUES ◽  
Maria do Socorro Padilha de OLIVEIRA ◽  
...  
Keyword(s):  
Genetic Differentiation ◽  
Molecular Characterization ◽  
Research Unit ◽  
Inter Simple Sequence Repeat ◽  
Sampling Effort ◽  
The North ◽  
Island State ◽  
Marajó Island ◽  
New Germplasm

ABSTRACT The bacurizeiro (Platonia insignis Mart.) is a tree native to the Amazon whose fruit is much used in the gastronomy in the North and Northeast regions of Brazil. Due to its great economic potential for these regions, the species is being conserved in germplasm banks to support genetic breeding programs. The aim of this work was the molecular characterization of P. insignis accessions belonging to the germplasm bank of the Embrapa Eastern Amazon research unit using ISSR (Inter Simple Sequence Repeat) markers. Seventy-eight accessions of P. insignis belonging to 16 progenies were sampled in two different localities on Marajó Island, state of Pará, Brazil. Among the 16 progenies, seven were collected in Soure and nine in Salvaterra. The 78 accessions were genotyped with 23 pre-selected primers. We obtained 121 amplified products, of which 54 were polymorphic. The most polymorphic primers were UBC 834, UBC 899 and UBC 900. Primers UBC810 and UBC884 did not amplify polymorphic bands. Forty-nine markers out of 54 were selected for genetic analyses. AMOVA within and among progenies showed low genetic differentiation (ΦPT = 0.064, P<0.001) with higher diversity within progenies (96%), low genetic differentiation among sampling localities (ΦPT = 0.025, P<0.013), and higher diversity within (98%) than among localities. Clustering by UPGMA based on Jaccard similarities among pairs of accessions did not separate genotypes according to progeny or sampling localitiy. We recommend that new germplasm surveys consider a greater sampling effort within sampling localitites.

scholarly journals Morphological aspects of Clinostomidae metacercariae (Trematoda: Digenea) in Hoplerytrinus unitaeniatusand Hoplias malabaricus (Pisces: Erythrinidae) of the Neotropical region, Brazil

2014 ◽  
Vol 86 (2) ◽  
pp. 733-744 ◽  
Author(s):  
RAIMUNDO N.M. BENIGNO ◽  
MARCELO KNOFF ◽  
EDILSON R. MATOS ◽  
DELIR C. GOMES ◽  
ROBERTO M. PINTO ◽  
...  
Keyword(s):  
First Record ◽  
Neotropical Region ◽  
Morphological Data ◽  
Intensity Of Infection ◽  
Mean Intensity ◽  
Hoplias Malabaricus ◽  
Morphological Aspects ◽  
Island State ◽  
Internal Structures ◽  
Marajó Island

Species of fish of Marajó Island, State of Pará, Brazil, were examined to identify the trematodes parasitizing 102 Hoplerytrinus unitaeniatus (gold wolf fish) and 104 Hoplias malabaricus (thraira). Metacercariae of two species of trematodes, 170 specimens of Clinostomatopsis sorbens and 10 Ithyoclinostomum dimorphum were found and identified. The parasitary indices of C. sorbens from H. unitaeniatus and H. malabaricus, were 43.14% and 30.77% for prevalence, 2.52 and 1.84 for mean intensity, 1.09 and 0.57 for mean abundance and 1 to 9 and 1 to 7 for range of infection, respectively, on both fish the site of infection was the mesentery. The parasitary indices of I. dimorphum from H. unitaeniatus were 2.94% for prevalence, 2.66 for mean intensity, 0.08 for mean abundance, 1 to 4 for range of infection, and the sites of infection were the mesentery and the muscle. Metacercariae of I. dimorphum were collected in muscles of a specimen of H. malabaricus, with 0.96% of prevalence, intensity of infection of 2 parasites and 0.02 of abundance. New morphological data of external and internal structures are presented. This is the first record of metacercariae of C. sorbens and I. dimorphum in Amazonian fish.

scholarly journals Lesions caused by anisakid and capillariid in Cairina moschata raised on Marajó island, state of Pará, Brazil

2021 ◽  
Vol 73 (4) ◽  
pp. 885-892
Author(s):  
E.L. Carvalho ◽  
R.L.S. Santana ◽  
D.F. Sousa ◽  
G.S. Cabral ◽  
R.H.S. Pinheiro ◽  
...  
Keyword(s):  
First Record ◽  
Muscovy Duck ◽  
Cairina Moschata ◽  
Helminth Infections ◽  
Island State ◽  
Third Stage ◽  
Marajó Island ◽  
Commercially Important ◽  
Extensive Farming ◽  
Fish Viscera

ABSTRACT The Muscovy duck is a commercially important bird on the island of Marajó usually raised in a peculiar system that includes supplying fish viscera to the birds under semi-extensive farming conditions. This enables a risk of contamination and losses in the production of these birds, resulting from injuries caused by helminth infections, especially nematodes. The objective of this study was to evaluate the histopathological changes caused by nematodes of the genera: Eucoleus, Anisakis and Contracaecum. Thirty-three ducks with lesions in the esophagus and ventricle were analyzed. Histopathological exams showed a mild inflammatory infiltrate in the submucosa of the esophagus caused by the fixation of E. contortus and third stage larvae of Anisakis sp., and we recorded third stage larvae of Contracaecum sp. parasitizing the ventricle, this being the first record of this parasite in ducks in Brazil.

scholarly journals Equine infectious anemia on Marajo Island at the mouth of the Amazon river

2015 ◽  
Vol 35 (12) ◽  
pp. 947-950 ◽  
Author(s):  
Nayra F.Q.R. Freitas ◽  
Carlos M.C. Oliveira ◽  
Rômulo C. Leite ◽  
Jenner K.P. Reis ◽  
Fernanda G. Oliveira ◽  
...  
Keyword(s):  
Equine Infectious Anemia Virus ◽  
Serological Survey ◽  
Santa Cruz ◽  
Agar Gel ◽  
Incurable Disease ◽  
Island State ◽  
Equine Infectious Anemia ◽  
Marajó Island ◽  
Males And Females ◽  
Anemia Virus

Abstract: Equine infectious anemia (EIA) is a transmissible and incurable disease caused by a lentivirus, the equine infectious anemia virus (EIAV). There are no reports in the literature of this infection in Equidae on Marajo Island. The objective of this study was to diagnose the disease in the municipalities of Cachoeira do Arari, Salvaterra, Santa Cruz do Arari and Soure, on Marajó Island, state of Pará, Brazil. For serological survey samples were collected from 294 horses, over 5-month-old, males and females of puruca and marajoara breeds and from some half-breeds, which were tested by immunodiffusion in Agar gel (AGID). A prevalence of 46.26% (136/294) positive cases was found. EIA is considered endemic in the municipalities studied, due to the ecology of the region with a high numbered population of bloodsucking insect vectors and the absence of official measures for the control of the disease.

Control of Steam-Turbine Regulators at Transition to an Island State

2009 ◽  
Vol 25 (25) ◽  
pp. 73-76
Author(s):  
Georgi Georgiev
Keyword(s):  
Steam Turbine ◽  
Dynamic Stability ◽  
Easy Problem ◽  
Island State ◽  
On Line ◽  
State Regime ◽  
Turbine Speed ◽  
The Given ◽  
Operating Algorithm

Control of Steam-Turbine Regulators at Transition to an Island StateThe simple operating algorithm is presented for steam turbine regulators of type Simadin (Siemens) at emergency switching-off of the generator from system together with some, unknown in advance, load. The given situation is known as "a transition to an island state (regime)". Keeping of turbine speed and preservation of its rating value at a generator blackout when its own needs will be load only, is an easy problem. When the generator remains in its island it is necessary to solve "on-line" two additional problems: to reveal a situation "island" and to estimate the island load for translating a regulator on the new task and providing dynamic stability of transition. The algorithm was tried and entered successfully into practice on Varna TPP, CEZ GROUP (Prague), in 2008.

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