Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Veterinary Research and Animal Science |
Texto Completo: | https://www.revistas.usp.br/bjvras/article/view/145204 |
Resumo: | Several studies show the presence of protozoa of the genus Nematopsis Schneider, 1892, in many species of bivalves. The pathogenicity of this Apicomplexa is still much debated, which is possibly related to the parasitism degree and host habitat. In this context, this study investigated parasitism by Nematopsis sp. in Mytella guyanensis (Bivalvia: Mytilidae) in a mangrove of the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil. The collections were made monthly, from March 2014 to March 2015, consisting of 30 adults with shell height above 40 mm per month, totaling 360 specimens. The specimens were measured, weighed, opened, and macroscopically examined for identifying parasites and/or signs of morphological changes. After that, they were fixed in Davidson’s solution and processed according to classical histological techniques, with inclusion in paraffin, obtaining 5 μm-thick sections by microtomy, and stained by Harris’ Hematoxylin and Eosin (HE). The water temperature ranged from 25.5 to 33.6 ºC and the salinity from 21.1 to 34.3 Practical Salinity Units (PSU). The specimens measured between 41.1 and 68.6 mm and had an average weight of 7.24 g. Macroscopically, there was no presence of the parasite or any morphological changes related its presence. The frequency percentage of Nematopsis sp. was 99.45%. The mantle was the organ with the highest frequency of infection (46.26%), followed by the gonads (18.36%). Among the analyzed organs, all presented the parasite and, in a few severely infected cases, microscopical changes were observed in the mantle conformation. The infection intensity for most of the sessions analyzed was 1 to 3 oocysts/phagocyte; however, in one of the sessions, 9 oocysts/phagocytes were recorded. The parasite had a negative correlation with salinity. The high frequency of Nematopsis sp. should be considered for the sustainability of natural stocks, especially if such parasitism occurs simultaneously with other pathogens and stressful environmental conditions. |
id |
USP-49_066261614d9bd1e48bfbaa58165858a6 |
---|---|
oai_identifier_str |
oai:revistas.usp.br:article/145204 |
network_acronym_str |
USP-49 |
network_name_str |
Brazilian Journal of Veterinary Research and Animal Science |
repository_id_str |
https://www.revistas.usp.br/bjvras/index |
spelling |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, BrasilParasitism by Nematopsis sp. (Apicomplexa: Eugregarinida) in Mytella guyanensis at the Marine Extractive Reserve Baía do Iguape, Bahia, BrazilBivalvesParasitismEnvironmental protection areaProtozoanEnvironmental sustainabilityBivalvesParasitismoÁrea de proteção ambientalProtozoárioSustentabilidade ambientalSeveral studies show the presence of protozoa of the genus Nematopsis Schneider, 1892, in many species of bivalves. The pathogenicity of this Apicomplexa is still much debated, which is possibly related to the parasitism degree and host habitat. In this context, this study investigated parasitism by Nematopsis sp. in Mytella guyanensis (Bivalvia: Mytilidae) in a mangrove of the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil. The collections were made monthly, from March 2014 to March 2015, consisting of 30 adults with shell height above 40 mm per month, totaling 360 specimens. The specimens were measured, weighed, opened, and macroscopically examined for identifying parasites and/or signs of morphological changes. After that, they were fixed in Davidson’s solution and processed according to classical histological techniques, with inclusion in paraffin, obtaining 5 μm-thick sections by microtomy, and stained by Harris’ Hematoxylin and Eosin (HE). The water temperature ranged from 25.5 to 33.6 ºC and the salinity from 21.1 to 34.3 Practical Salinity Units (PSU). The specimens measured between 41.1 and 68.6 mm and had an average weight of 7.24 g. Macroscopically, there was no presence of the parasite or any morphological changes related its presence. The frequency percentage of Nematopsis sp. was 99.45%. The mantle was the organ with the highest frequency of infection (46.26%), followed by the gonads (18.36%). Among the analyzed organs, all presented the parasite and, in a few severely infected cases, microscopical changes were observed in the mantle conformation. The infection intensity for most of the sessions analyzed was 1 to 3 oocysts/phagocyte; however, in one of the sessions, 9 oocysts/phagocytes were recorded. The parasite had a negative correlation with salinity. The high frequency of Nematopsis sp. should be considered for the sustainability of natural stocks, especially if such parasitism occurs simultaneously with other pathogens and stressful environmental conditions.Diversos estudos evidenciam a presença de protozoários do gênero Nematopsis Schneider, 1892 em várias espécies de bivalves. A patogenicidade desse apicomplexo ainda é bastante debatida, a qual possivelmente relaciona-se ao grau de parasitismo e habitat do hospedeiro. Nesse contexto, este estudo investigou o parasitismo por Nematopsis sp. em Mytella guyanensis (Bivalvia: Mytilidae) em um manguezal da Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil. As coletas foram efetuadas mensalmente, de março de 2014 a março de 2015, constando 30 adultos com altura da concha acima de 40 mm, totalizando 360 espécimens. Os espécimens foram medidos, pesados, abertos e examinados macroscopicamente para a identificação de parasitos e/ou sinais de alterações morfológicas, em seguida fixados em solução de Davidson e processados segundo técnica histológica clássica, com inclusão em parafina, obtenção de cortes de 5 μm de espessura por microtomia e coloração por hematoxilina de Harris e Eosina (HE). A temperatura da água variou de 25,5 a 33,6 ºC e a salinidade de 21,1 a 34,3 Unidades Práticas de Salinidade (UPS). Os espécimens mediram entre 41,1 e 68,6 mm e tiveram um peso médio de 7,24 g. Macroscopicamente, não se observou presença do parasito ou qualquer alteração morfológica relacionada à presença do mesmo. A frequência percentual de Nematopsis sp. foi de 99,45%. O manto foi o órgão de maior frequência de infecção(46,26%), seguido das gônadas (18,36%). Entre os órgãos analisados, todos apresentaram o parasito, sendo que, para poucos casos severamente infectados, observaram-se microscopicamente modificações na conformação do manto. A intensidade de infecção para a maioria das sessões analisadas foi de 1 a 3 oocistos/fagócitos, contudo em uma das sessões foram registrados 9 oocistos/fagócitos. O parasito apresentou correlação negativa com a salinidade. A elevada frequência do Nematopsis sp. deve ser levada em consideração para a sustentabilidade dos estoques naturais, principalmente se tal parasitismo ocorrer simultaneamente a outros patógenos e condições ambientais estressantes.Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia2019-03-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjvras/article/view/14520410.11606/issn.1678-4456.bjvras.2018.145204Brazilian Journal of Veterinary Research and Animal Science; Vol. 55 Núm. 4 (2018); e145204Brazilian Journal of Veterinary Research and Animal Science; Vol. 55 No. 4 (2018); e145204Brazilian Journal of Veterinary Research and Animal Science; v. 55 n. 4 (2018); e145204Brazilian Journal of Veterinary Research and Animal Science; V. 55 N. 4 (2018); e1452041678-44561413-9596reponame:Brazilian Journal of Veterinary Research and Animal Scienceinstname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)instacron:USPenghttps://www.revistas.usp.br/bjvras/article/view/145204/151178Copyright (c) 2019 Brazilian Journal of Veterinary Research and Animal Scienceinfo:eu-repo/semantics/openAccessCamilo, Valéria Macedo AlmeidaSouza, Jamille da ConceiçãoFreitas, Fernanda deMiranda, Felipe Silva deCampiolo, SofiaBoehs, Guisla2020-06-23T04:02:41Zoai:revistas.usp.br:article/145204Revistahttps://www.revistas.usp.br/bjvrasPUBhttps://www.revistas.usp.br/bjvras/oaibjvras@usp.br1413-95961413-9596opendoar:https://www.revistas.usp.br/bjvras/index2023-01-12T16:44:02.034426Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP)false |
dc.title.none.fl_str_mv |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil Parasitism by Nematopsis sp. (Apicomplexa: Eugregarinida) in Mytella guyanensis at the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil |
title |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
spellingShingle |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil Camilo, Valéria Macedo Almeida Bivalves Parasitism Environmental protection area Protozoan Environmental sustainability Bivalves Parasitismo Área de proteção ambiental Protozoário Sustentabilidade ambiental |
title_short |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
title_full |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
title_fullStr |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
title_full_unstemmed |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
title_sort |
Parasitismo por Nematopsis sp. (Apicomplexa: Eugregarinida) em Mytella guyanensis na Reserva Extrativista Marinha Baía do Iguape, Bahia, Brasil |
author |
Camilo, Valéria Macedo Almeida |
author_facet |
Camilo, Valéria Macedo Almeida Souza, Jamille da Conceição Freitas, Fernanda de Miranda, Felipe Silva de Campiolo, Sofia Boehs, Guisla |
author_role |
author |
author2 |
Souza, Jamille da Conceição Freitas, Fernanda de Miranda, Felipe Silva de Campiolo, Sofia Boehs, Guisla |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Camilo, Valéria Macedo Almeida Souza, Jamille da Conceição Freitas, Fernanda de Miranda, Felipe Silva de Campiolo, Sofia Boehs, Guisla |
dc.subject.por.fl_str_mv |
Bivalves Parasitism Environmental protection area Protozoan Environmental sustainability Bivalves Parasitismo Área de proteção ambiental Protozoário Sustentabilidade ambiental |
topic |
Bivalves Parasitism Environmental protection area Protozoan Environmental sustainability Bivalves Parasitismo Área de proteção ambiental Protozoário Sustentabilidade ambiental |
description |
Several studies show the presence of protozoa of the genus Nematopsis Schneider, 1892, in many species of bivalves. The pathogenicity of this Apicomplexa is still much debated, which is possibly related to the parasitism degree and host habitat. In this context, this study investigated parasitism by Nematopsis sp. in Mytella guyanensis (Bivalvia: Mytilidae) in a mangrove of the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil. The collections were made monthly, from March 2014 to March 2015, consisting of 30 adults with shell height above 40 mm per month, totaling 360 specimens. The specimens were measured, weighed, opened, and macroscopically examined for identifying parasites and/or signs of morphological changes. After that, they were fixed in Davidson’s solution and processed according to classical histological techniques, with inclusion in paraffin, obtaining 5 μm-thick sections by microtomy, and stained by Harris’ Hematoxylin and Eosin (HE). The water temperature ranged from 25.5 to 33.6 ºC and the salinity from 21.1 to 34.3 Practical Salinity Units (PSU). The specimens measured between 41.1 and 68.6 mm and had an average weight of 7.24 g. Macroscopically, there was no presence of the parasite or any morphological changes related its presence. The frequency percentage of Nematopsis sp. was 99.45%. The mantle was the organ with the highest frequency of infection (46.26%), followed by the gonads (18.36%). Among the analyzed organs, all presented the parasite and, in a few severely infected cases, microscopical changes were observed in the mantle conformation. The infection intensity for most of the sessions analyzed was 1 to 3 oocysts/phagocyte; however, in one of the sessions, 9 oocysts/phagocytes were recorded. The parasite had a negative correlation with salinity. The high frequency of Nematopsis sp. should be considered for the sustainability of natural stocks, especially if such parasitism occurs simultaneously with other pathogens and stressful environmental conditions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-03-12 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/bjvras/article/view/145204 10.11606/issn.1678-4456.bjvras.2018.145204 |
url |
https://www.revistas.usp.br/bjvras/article/view/145204 |
identifier_str_mv |
10.11606/issn.1678-4456.bjvras.2018.145204 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/bjvras/article/view/145204/151178 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Brazilian Journal of Veterinary Research and Animal Science info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Brazilian Journal of Veterinary Research and Animal Science |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia |
dc.source.none.fl_str_mv |
Brazilian Journal of Veterinary Research and Animal Science; Vol. 55 Núm. 4 (2018); e145204 Brazilian Journal of Veterinary Research and Animal Science; Vol. 55 No. 4 (2018); e145204 Brazilian Journal of Veterinary Research and Animal Science; v. 55 n. 4 (2018); e145204 Brazilian Journal of Veterinary Research and Animal Science; V. 55 N. 4 (2018); e145204 1678-4456 1413-9596 reponame:Brazilian Journal of Veterinary Research and Animal Science instname:Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) instacron:USP |
instname_str |
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Brazilian Journal of Veterinary Research and Animal Science |
collection |
Brazilian Journal of Veterinary Research and Animal Science |
repository.name.fl_str_mv |
Brazilian Journal of Veterinary Research and Animal Science - Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) |
repository.mail.fl_str_mv |
bjvras@usp.br |
_version_ |
1797051567330820096 |