Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream
Abstract: Aim The objectives of this study were to evaluate which allometric measurements of Leptonema larvae are most suitable in order to develop mathematical equations to describe biomass relationships for the population of this taxon in a reference condition headwater stream. Methods We measur...
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| Format: | Article |
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Associação Brasileira de Limnologia
2023-04-01
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| Series: | Acta Limnologica Brasiliensia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2023000100705&lng=en&tlng=en |
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| author | Amanda de Melo Coelho Pedro Henrique Monteiro do Amaral Marden Seabra Linares Marcos Callisto |
| author_facet | Amanda de Melo Coelho Pedro Henrique Monteiro do Amaral Marden Seabra Linares Marcos Callisto |
| author_sort | Amanda de Melo Coelho |
| collection | DOAJ |
| description | Abstract: Aim The objectives of this study were to evaluate which allometric measurements of Leptonema larvae are most suitable in order to develop mathematical equations to describe biomass relationships for the population of this taxon in a reference condition headwater stream. Methods We measured four body dimensions (body length, interocular distance, horizontal width of cephalic capsule and vertical width of the cephalic capsule) of 65 Leptonema larvae, which were collected in February 2022, in the Taboões spring, Serra do Rola Moça State Park, Minas Gerais, using a Surber sampler. For the determination of allometric measurements, each individual was photographed under a dissecting stereomicroscope (Leica M80) equipped with a digital camera. Each photographed specimen's length was measured using the Motic Image Plus 2.0 software. After measuring the linear body dimension and direct measurement of the biomass, we used these values to calculate the length-mass mathematical equations. To the equations use power models: DM = a Lb, where a/b are constants, DM is the dry mass, L is the linear body dimension. Results Among body dimensions of Leptonema larvae, body length showed the greatest range of variation, with values ranging from 4.03 to 25.28 mm, followed by head capsule vertical width (0.51 - 2.69 mm), head capsule horizontal width (0.55 - 2.22 mm) and interocular distance (0.24 - 1.88 mm). Our results show that body length provided the best-fitting equation for estimating biomass (R2 = 0.90). However, we observed a close fit between the other allometric measures, including high coefficients of determination, head capsule horizontal width (R2 = 0.85), interocular distance (R2 = 0.82), head capsule vertical width (R2 = 0.78). Conclusions These results will be useful in providing the best allometric measurement and equations to estimate the biomass of Leptonema larvae from the tropics. |
| first_indexed | 2024-04-09T19:41:22Z |
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| id | doaj.art-bb7be20c5b3f4169af1099fdfa5302fb |
| institution | Directory Open Access Journal |
| issn | 2179-975X |
| language | English |
| last_indexed | 2024-04-09T19:41:22Z |
| publishDate | 2023-04-01 |
| publisher | Associação Brasileira de Limnologia |
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| series | Acta Limnologica Brasiliensia |
| spelling | doaj.art-bb7be20c5b3f4169af1099fdfa5302fb2023-04-04T07:32:24ZengAssociação Brasileira de LimnologiaActa Limnologica Brasiliensia2179-975X2023-04-013510.1590/s2179-975x0523Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater streamAmanda de Melo Coelhohttps://orcid.org/0000-0001-6641-0756Pedro Henrique Monteiro do Amaralhttps://orcid.org/0000-0003-0623-0897Marden Seabra Linareshttps://orcid.org/0000-0002-7218-9768Marcos Callistohttps://orcid.org/0000-0003-2341-4700Abstract: Aim The objectives of this study were to evaluate which allometric measurements of Leptonema larvae are most suitable in order to develop mathematical equations to describe biomass relationships for the population of this taxon in a reference condition headwater stream. Methods We measured four body dimensions (body length, interocular distance, horizontal width of cephalic capsule and vertical width of the cephalic capsule) of 65 Leptonema larvae, which were collected in February 2022, in the Taboões spring, Serra do Rola Moça State Park, Minas Gerais, using a Surber sampler. For the determination of allometric measurements, each individual was photographed under a dissecting stereomicroscope (Leica M80) equipped with a digital camera. Each photographed specimen's length was measured using the Motic Image Plus 2.0 software. After measuring the linear body dimension and direct measurement of the biomass, we used these values to calculate the length-mass mathematical equations. To the equations use power models: DM = a Lb, where a/b are constants, DM is the dry mass, L is the linear body dimension. Results Among body dimensions of Leptonema larvae, body length showed the greatest range of variation, with values ranging from 4.03 to 25.28 mm, followed by head capsule vertical width (0.51 - 2.69 mm), head capsule horizontal width (0.55 - 2.22 mm) and interocular distance (0.24 - 1.88 mm). Our results show that body length provided the best-fitting equation for estimating biomass (R2 = 0.90). However, we observed a close fit between the other allometric measures, including high coefficients of determination, head capsule horizontal width (R2 = 0.85), interocular distance (R2 = 0.82), head capsule vertical width (R2 = 0.78). Conclusions These results will be useful in providing the best allometric measurement and equations to estimate the biomass of Leptonema larvae from the tropics.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2023000100705&lng=en&tlng=enallometric measuresbiomassbody dimensionsinvertebrates |
| spellingShingle | Amanda de Melo Coelho Pedro Henrique Monteiro do Amaral Marden Seabra Linares Marcos Callisto Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream Acta Limnologica Brasiliensia allometric measures biomass body dimensions invertebrates |
| title | Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream |
| title_full | Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream |
| title_fullStr | Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream |
| title_full_unstemmed | Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream |
| title_short | Length-dry mass regressions for Leptonema (Trichoptera, Hydropsychidae) larvae in a Neotropical headwater stream |
| title_sort | length dry mass regressions for leptonema trichoptera hydropsychidae larvae in a neotropical headwater stream |
| topic | allometric measures biomass body dimensions invertebrates |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2023000100705&lng=en&tlng=en |
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