Chironomidae: Biology, Ecology and Systematics

Zerguine, Karima

doi:10.5772/intechopen.95577

Cited by 8 publications

(8 citation statements)

References 48 publications

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“…A crucial other finding is that emergence over time was more sensitive, with a significantly lowest observed effect concentration (LOEC) of 0.90 μg/L, compared to total emergence (LOEC of 3.90 μg/L ). Delays in emergence can have disruptive consequences on overall population levels of insects (Dewey 1986 ), especially as chironomids have a short lifecycle, including the adult stage (Karima 2021 ). During the aerial stage, mating occurs in large swarms, where the males attract the females.…”

Section: Discussionmentioning

confidence: 99%

Participatory hackathon to determine ecological relevant endpoints for a neurotoxin to aquatic and benthic invertebrates

Rasmussen,

Bosker,

Ramanand

et al. 2024

Environ Sci Pollut Res

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The aim of this study is twofold: i) to determine innovative yet sensitive endpoints for sulfoxaflor and ii) to develop best practices for innovative teaching in ecotoxicology. To this end, a group of 52 MSc students participated in an environmental hackathon, during which they did creative toxicity testing on 5 freshwater invertebrate species: Daphnia magna, Chironomus riparius, Asellus aquaticus, Lymnaea stagnalis, and Anisus vortex. Involving the students in an active learning environment stimulated increased creativity and productivity. In total, 28 endpoints were investigated, including standard endpoints (e.g., mortality) as well as biomechanistic and energy-related endpoints. Despite high variances in the results, likely linked to the limited lab experience of the students and interpersonal differences, a promising set of endpoints was selected for further investigation. A more targeted follow-up experiment focused on the most promising organism and set of endpoints: biomechanistic endpoints of C. riparius larvae. Larvae were exposed to a range of sulfoxaflor concentrations (0.90–67.2 μg/L) for 21 days. Video tracking showed that undulation and swimming were significantly reduced at 11.1 μg sulfoxaflor/L after 9 days of exposure, and an EC50 = 10.6 μg/L for mean velocities of the larvae in the water phase was found. Biomechanistic endpoints proved much more sensitive than mortality, for which an LC50 value of 116 μg/L was found on Day 9. Our results show that performing a hackathon with students has excellent potential to find sensitive endpoints that can subsequently be verified using more targeted and professional follow-up experiments. Furthermore, utilising hackathon events in teaching can increase students’ enthusiasm about ecotoxicology, driving better learning experiences.

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Section: Discussionmentioning

confidence: 99%

Participatory hackathon to determine ecological relevant endpoints for a neurotoxin to aquatic and benthic invertebrates

Rasmussen,

Bosker,

Ramanand

et al. 2024

Environ Sci Pollut Res

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“…Chironomids are holometabolous insects; their immature larval and pupal stages are generally subservient to aquatic habitats and develop in freshwater (Karima, 2021).…”

Section: Study Site and Specimen Collectionmentioning

confidence: 99%

Evolutionary relationships among several species from the genus Cricotopus (Diptera: Chironomidae): What about Turkish representatives of this genus?

2021

Turk J Zool

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The genus Cricotopus (Diptera: Chironomidae) has a worldwide distribution and possesses a wide variation in ecology and habitat preference across its distribution. Identification ofCricotopus species and distinguishing them from the species of closely related genera (i.e., Orthocladius and Paratrichocladius) are generally difficult. This study purposed to investigate the evolutionary history of several Cricotopus species, with a main focus on Cricotopus bicinctus, C. flavocinctus, C. triannulatus, C. patens, C. intersectus, C. laricomalis, C. ornatus, C. reversus, and C. sylvestris from Turkey, using the mitochondrial cytochrome c oxidase subunit I (COI) gene. Molecular classifications of Turkish Cricotopus species were full compatible with the morphological species identity, suggesting the adequacy and practicability of existing larval keys for identifying these specimens to species. The sampled Turkish Cricotopus species with two or more representatives was found to produce monophyletic groups.Diversification time estimates showed that the diversification of Cricotopus was initiated in the late Cretaceous. Additionally, these estimates suggested a distinct continental structuring in the evolution of some species and a possible origination of the sampled Turkish representatives of this genus from North European representatives.Based on the results of this study, the COI gene is concluded to be useful both for species identification in the genus Cricotopus and for estimating their evolutionary relationships. This study provides valuable information on the evolutionary relationships among Cricotopus species. However, to obtain more accurate and/or persuasive results, an intensive and targeted sampling from more locations and the inclusion of more sequence data from not only the mitochondrial COI gene but also 3 additional nuclear and/or mitochondrial markers are highly recommended for further studies.

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“…Chironomus, Meigen,1803 commonly known as the non-biting midge/lake ies belonging to the Family Chironomidae has been studied and 647 species identi ed globally, (Arnett, 2000;GBIF, 2018;Epler, 2019). The striking feature being the red coloration attributed to the hemoglobin protein, hence the name bloodworm, an adaptive characteristic for the survival in low oxygen habitats (Sagi et al, 1995;Klaus et al, 2008;Malgorzata et al, 2017;Karima, 2021). Although, the genus Chironomus is among the largest in class Insecta among the macroinvertebrates, morphological analysis of the larvae of the organism has been restricted by the concealed features of the organism to allow for further studies of the genus, hence only identi able with the giant chromosomes using DNA barcodes (Chib & Jasrotia, 2022;Pape & Evenhuis, 2021).…”

Section: Introductionmentioning

confidence: 99%

Chironomus Species Dna Barcording in Monitoring the Pollution Levels of the Nyanza Gulf in Lake Victoria, Kenya

Misiko,

Bere,

Andika

et al. 2024

Preprint

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Chironomidae is a group of diptera insects, commonly known as “non-biting midges'' in the adult stage and “bloodworms” in the larval stage, represent a group of insects that thrive in various aquatic environment worldwide. Despite the plethora of information on Chironomidae in many parts of the world, there is a paucity of data regarding this indicator species in the polluted Kenyan Nyanza Gulf of Lake Victoria and molecular identification has not been explored. This study aimed to characterize Chironomidae species based on the mitochondrial DNA barcoding of the cytochrome oxidase subunit 1(COI) gene. Aquatic insects were collected from inshore and offshore in the Nyanza gulf, with a focus on pollution gradient. Chironomus larvae were subjected to analysis to discern divergence or convergence among conspecifics or intraspecific based on pollution gradients. The COI gene was amplified, sequenced using species-specific primers and compared to Gene Bank entries. Genetic analysis was done using MEGA version 11. Phylogenetic analyses employed Neighbor-joining and maximum parsimony algorithms with 1000 bootstrap replicates. The results revealed two known species, Chironomus transvaalensis from heavily polluted Kisumu station, and Chironomus pseudothummi from moderately polluted Kendu bay and Homabay stations, within the same biogeophysical environment. Additionally, a unique Chironomus species was identified on Ndere Island, an offshore station, presumed to be a clean site with restricted human activities. Sequences comparisons with global data indicated proximity but highlighted evolutionary significance and uniqueness. The study postulates that pollution serves as a selective pressure, driving the evolution of Chironomidae species in this particular region.

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Chironomidae: Biology, Ecology and Systematics

Cited by 8 publications

References 48 publications

Participatory hackathon to determine ecological relevant endpoints for a neurotoxin to aquatic and benthic invertebrates

Participatory hackathon to determine ecological relevant endpoints for a neurotoxin to aquatic and benthic invertebrates

Evolutionary relationships among several species from the genus Cricotopus (Diptera: Chironomidae): What about Turkish representatives of this genus?

Chironomus Species Dna Barcording in Monitoring the Pollution Levels of the Nyanza Gulf in Lake Victoria, Kenya

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