Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae)
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Nauplius |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972021000100228 |
Resumo: | Abstract Pesticides can interfere with various aspects of growth and the normal molt cycle of a crustacean. Poppiana dentata (Randall, 1840), an indigenous crab species, spends most of its life cycle in, and proximal to, benthic sediments in which pesticide residues can reside. This study sought to assess the sublethal effects of a locally-used, commercial malathion insecticide on growth aspects of P. dentata. Juvenile crabs were obtained from berried females collected in northwest Trinidad. Young crabs were placed in a control (insecticide-free) treatment and an exposure treatment involving continuous exposure to the malathion insecticide, at 10 µg/L concentration over five months (n = 4 crabs/treatment). Carapace width (CW), length (CL) and intermolt period were recorded and used to derive size increment, specific growth rate (SGR), growth curves and logistic equations. Malathion-exposed crabs exhibited irregular patterns in SGR and size increment. Exposed crabs also exhibited a delay in molting and longer intermolt periods, compared to the control crabs (p < 0.05). Breakpoint (17.5 mm CW) and maximum size (CW = 25.77 (1+exp (1.500-0.056t))-1) for exposed crabs were relatively smaller than those of the control (22.11 mm CW; CW = 34.30 (1+exp (1.774-0.035t))-1). Findings indicate that sublethal exposure to malathion insecticide altered growth patterns in P. dentata, some of which can influence maturity and later cascade into secondary consequences for local populations. |
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Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae)Endpointorganophosphate pesticidespecific growth rateTrichodactylidaeAbstract Pesticides can interfere with various aspects of growth and the normal molt cycle of a crustacean. Poppiana dentata (Randall, 1840), an indigenous crab species, spends most of its life cycle in, and proximal to, benthic sediments in which pesticide residues can reside. This study sought to assess the sublethal effects of a locally-used, commercial malathion insecticide on growth aspects of P. dentata. Juvenile crabs were obtained from berried females collected in northwest Trinidad. Young crabs were placed in a control (insecticide-free) treatment and an exposure treatment involving continuous exposure to the malathion insecticide, at 10 µg/L concentration over five months (n = 4 crabs/treatment). Carapace width (CW), length (CL) and intermolt period were recorded and used to derive size increment, specific growth rate (SGR), growth curves and logistic equations. Malathion-exposed crabs exhibited irregular patterns in SGR and size increment. Exposed crabs also exhibited a delay in molting and longer intermolt periods, compared to the control crabs (p < 0.05). Breakpoint (17.5 mm CW) and maximum size (CW = 25.77 (1+exp (1.500-0.056t))-1) for exposed crabs were relatively smaller than those of the control (22.11 mm CW; CW = 34.30 (1+exp (1.774-0.035t))-1). Findings indicate that sublethal exposure to malathion insecticide altered growth patterns in P. dentata, some of which can influence maturity and later cascade into secondary consequences for local populations.Sociedade Brasileira de Carcinologia2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972021000100228Nauplius v.29 2021reponame:Naupliusinstname:Sociedade Brasileira de Carcinologia (SBCA)instacron:SBCA10.1590/2358-2936e2021030info:eu-repo/semantics/openAccessSingh,Delezia ShivaniAlkins-Koo,MaryRostant,Luke VictorMohammed,Azadeng2021-06-24T00:00:00Zoai:scielo:S0104-64972021000100228Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6497&lng=en&nrm=isohttps://old.scielo.br/oai/scielo-oai.php||editor.nauplius@gmail.com2358-29360104-6497opendoar:2021-06-24T00:00Nauplius - Sociedade Brasileira de Carcinologia (SBCA)false |
dc.title.none.fl_str_mv |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
title |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
spellingShingle |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) Singh,Delezia Shivani Endpoint organophosphate pesticide specific growth rate Trichodactylidae |
title_short |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
title_full |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
title_fullStr |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
title_full_unstemmed |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
title_sort |
Sublethal effects of malathion insecticide on growth of the freshwater crab Poppiana dentata (Randall, 1840) (Decapoda: Trichodactylidae) |
author |
Singh,Delezia Shivani |
author_facet |
Singh,Delezia Shivani Alkins-Koo,Mary Rostant,Luke Victor Mohammed,Azad |
author_role |
author |
author2 |
Alkins-Koo,Mary Rostant,Luke Victor Mohammed,Azad |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Singh,Delezia Shivani Alkins-Koo,Mary Rostant,Luke Victor Mohammed,Azad |
dc.subject.por.fl_str_mv |
Endpoint organophosphate pesticide specific growth rate Trichodactylidae |
topic |
Endpoint organophosphate pesticide specific growth rate Trichodactylidae |
description |
Abstract Pesticides can interfere with various aspects of growth and the normal molt cycle of a crustacean. Poppiana dentata (Randall, 1840), an indigenous crab species, spends most of its life cycle in, and proximal to, benthic sediments in which pesticide residues can reside. This study sought to assess the sublethal effects of a locally-used, commercial malathion insecticide on growth aspects of P. dentata. Juvenile crabs were obtained from berried females collected in northwest Trinidad. Young crabs were placed in a control (insecticide-free) treatment and an exposure treatment involving continuous exposure to the malathion insecticide, at 10 µg/L concentration over five months (n = 4 crabs/treatment). Carapace width (CW), length (CL) and intermolt period were recorded and used to derive size increment, specific growth rate (SGR), growth curves and logistic equations. Malathion-exposed crabs exhibited irregular patterns in SGR and size increment. Exposed crabs also exhibited a delay in molting and longer intermolt periods, compared to the control crabs (p < 0.05). Breakpoint (17.5 mm CW) and maximum size (CW = 25.77 (1+exp (1.500-0.056t))-1) for exposed crabs were relatively smaller than those of the control (22.11 mm CW; CW = 34.30 (1+exp (1.774-0.035t))-1). Findings indicate that sublethal exposure to malathion insecticide altered growth patterns in P. dentata, some of which can influence maturity and later cascade into secondary consequences for local populations. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972021000100228 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972021000100228 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2358-2936e2021030 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Carcinologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Carcinologia |
dc.source.none.fl_str_mv |
Nauplius v.29 2021 reponame:Nauplius instname:Sociedade Brasileira de Carcinologia (SBCA) instacron:SBCA |
instname_str |
Sociedade Brasileira de Carcinologia (SBCA) |
instacron_str |
SBCA |
institution |
SBCA |
reponame_str |
Nauplius |
collection |
Nauplius |
repository.name.fl_str_mv |
Nauplius - Sociedade Brasileira de Carcinologia (SBCA) |
repository.mail.fl_str_mv |
||editor.nauplius@gmail.com |
_version_ |
1752126582686744576 |