Setting the reference for the use of Chironomus sancticaroli (Diptera: Chironomidae) as bioindicator: Ontogenetic pattern of larval head structures

Rebechi, Débora; Navarro-Silva, Mário Antônio

doi:10.1590/s1984-46702012000200009

Cited by 6 publications

(5 citation statements)

References 18 publications

(7 reference statements)

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“…Furthermore, we suggest an alternative way to ascertain the larval instars: the variation in the number of striae present on the ventromental plates. This method makes it unnecessary to use morphometric data, as in the present study (REBECHI & NAVARRO-SILVA 2012). Beyond the length of the head capsule from ventral view, measurements of the antennae, mandibles, mentum and ventromental plates are efficient alternatives for the determination of the larval instars, as found by FORD (1959) for antennae and mandibles of Clinotanypus nervosus Meigen, 1818; Anatopynia trifascipennis Zetterstedt, 1838 and Procladius choreus Meigen, 1804 and by FROUZ et al (2002) for the mentum of Chironomus crassicaudatus Malloch, 1915 andGlyptotendipes paripes (Edwards, 1929).…”

Section: Discussionmentioning

confidence: 94%

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures

Richardi¹,

Rebechi²,

Aranha

et al. 2013

Zoologia (Curitiba)

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Determining the age composition of a population is important when conducting ecological, taxonomic and environmental assessments. Morphometric measurements of the head capsule, especially the length and width, are widely used in the identification of insect instars, but alternative ways for determining the age of insects can expand the options for the analysis of field and laboratory populations. This study evaluated the morphometry of the antennae, mandibles, mentum and ventromental plates to discriminate among the four larval instars of Chironomus sancticaroli Strixino & Strixino, 1981. The larvae were reared in the laboratory under constant temperature (25°C) and photoperiod of 12/12 hours for 19 days, with a supply of food. Fifteen larvae were removed randomly every day, cleared in KOH, and slide-mounted, and had the antennae, mandibles, mentum and ventromental plates measured. The dimensions of the four structures studied allowed us to statistically distinguish each of the four larval instars. The data fit an exponential equation according to the Brooks-Dyar rule, which allows an estimate of the larval instar of specimens collected in the field, even when development takes place under different conditions. The duration of each instar was also obtained from our data, and showed an overlap of instars during development.

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Section: Discussionmentioning

confidence: 94%

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures

Richardi¹,

Rebechi²,

Aranha

et al. 2013

Zoologia (Curitiba)

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“…On the other hand, Dornfeld (2006); evaluating the toxicity of cadmium and copper in C. xanthus assays, observed only 2.0% deformity in control larvae. In laboratory culturing, Rebechi and Silva (2012) observed 9% of mentum deformity in C. sancticaroli (instar II) reared in standard conditions and 48% in III instar, while Viveiros (2012) observed an average of 13% for the same specie (IV instar). Despite these data, the criteria used for field studies should not be applied directly to laboratories tests, because the environmental conditions are different.…”

Section: Resultsmentioning

confidence: 99%

Frequency of mentum deformity in Chironomus sancticaroli (Diptera: Chironomidae) in a laboratory culture

Silva¹,

Marigo²,

Viveiros³

et al. 2019

Rev. ambiente água

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The midge Chironomus sancticaroli (Diptera: Chironomidae) has been used in ecotoxicological tests because it is sensitive to a variety of inorganic pollutants. Among the parameters used to evaluate the toxicity of a substance is the frequency of mentum deformity, which is part of the oral system of this organism. However, there is still no consensus on the baseline level (percentage) of acceptable deformities in laboratory cultures not exposed to pollutants. The determination of this variable is important to ensure the validity of bioassays and to compare cultures from different research and teaching institutions. Once this value is established, it will also be used to monitor the quality of organisms cultured, since factors such as inbreeding could increase the frequency of mentum deformity. Thus, the objective of this study was to quantify the percentage of mentum deformity in the fourth instar of C. sancticaroli larvae from the culture of the Laboratory of Aquatic Ecosystems, at Embrapa Meio Ambiente. The average frequency of mentum deformity obtained was 6,63%. It is believed that factors such as the renewal of the culture with the inclusion of spawns from the laboratories of other institutions, as well as the control of the quality of the dilution water and the sediment of the breeding may have contributed to a low frequency of mentum deformity of the culture observed in this study.

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“…8, No. 1 (Rebechi and Navarro-Silva 2012). In this study various types of deformities were analyses in C. circumdatus, and K. calligaster larvae.…”

Section: Journal Of Environment and Ecologymentioning

confidence: 97%

Effects of Three Selected Pesticides on the Non-Biting Midges (Diptera: Chironomidae) in Rice Agro-Ecosystem of an area of West Bengal; India

Pan¹,

Majumdar²,

Jana³

et al. 2017

JEE

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Deformities of non biting midge larvae’s mouthparts are considered as indicators of environmental degradation that caused by water pollutants like pesticides, heavy metals, organic contaminants etc. The present investigation was aimed to assess the effects of 3 pesticides, viz. Cartap Hydrochloride, Carbofuran and Fipronil on deformities of chironomid larvae of the Rice fields of Village Dhunui; Memari Block-II of Burdwan district in West Bengal. The study area is dominated by the species of the genus Chironomus of chironomid community. Concurrently six (6) species were considered. The average percentage of mouthpart deformities was 14% in all chironomid larvae. Highest degree of malformation was noticed in Chironomus circumdatus in which more than 18.90% of all specimens were affected. However, further investigative efforts are essential to investigate the actual explanation in support of the occurrence of high degree of deformities in chironomid.

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Setting the reference for the use of Chironomus sancticaroli (Diptera: Chironomidae) as bioindicator: Ontogenetic pattern of larval head structures

Cited by 6 publications

References 18 publications

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures

Determination of larval instars in Chironomus sancticaroli (Diptera: Chironomidae) using novel head capsule structures

Frequency of mentum deformity in Chironomus sancticaroli (Diptera: Chironomidae) in a laboratory culture

Effects of Three Selected Pesticides on the Non-Biting Midges (Diptera: Chironomidae) in Rice Agro-Ecosystem of an area of West Bengal; India

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