LENGTHí WEIGHT RELATIONSHIPS AND BIOLOGICAL ASPECTS FOR 34 FISH SPECIES FROM TRí­Å S IRMÃOS RESERVOIR, LOWER TIETí­Å  RIVER BASIN, SP - BRAZIL

Campanha, Paula Maria Gênova de Castro; Matsumoto, Anderson Arimura; Brazão, Midiã Lima; Basilio, Lucas Matheus; Maruyama, Lídia Sumile

doi:10.20950/1678-2305.2019.45.3.458

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…We identified abundant carnivorous species such as O. aureus, O. nilotocus, C. piquiti, C. kelberi, C. ocellaris and Plagioscion squamosissimus. In fact, three of the most abundant species captured by traditional monitoring during 2021 [50] were also among the most frequently detected at multiple stations using eDNA (P. squamosissimus and C. kelberi), supporting our findings.…”

Section: Discussionsupporting

confidence: 88%

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Cortez,

Torres,

Guimarães

et al. 2024

Preprint

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Monitoring biodiversity on a large scale, such as in hydropower reservoirs, poses scientific challenges. Conventional methods such as passive fishing gear are prone to various biases, while the utilization of environmental DNA (eDNA) metabarcoding has been restricted. Most eDNA studies have primarily focused on replicating results from traditional methods, which themselves have limitations regarding representativeness and bias. In our study, we employed eDNA metabarcoding with three markers (12SrRNA, COI, and 16SrRNA) to evaluate the biodiversity of an 800 km2 reservoir. We utilized hydrodynamic modeling to determine water flow velocity and the water renewal ratio throughout the study area. Additionally, we conducted statistical comparisons – rarefaction curves and multivariate methods – among samples as an alternative approach to assess biodiversity representation. The eDNA identified taxa previously documented in the reservoir by traditional monitoring methods, as well as revealed 29 – nine fishes and 20 non-fish – previously unreported species. These results highlight the robustness of eDNA as a biodiversity monitoring technique. Our findings also indicated that by randomly sampling 30% of the original number of samples, we could effectively capture the same biodiversity. This approach enabled us to comprehend the reservoir's biodiversity profile and propose a straightforward, cost-effective monitoring protocol for the future based on eDNA.

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Section: Discussionsupporting

confidence: 88%

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Cortez,

Torres,

Guimarães

et al. 2024

Preprint

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“…This is a general pattern for fishes, except for large‐sized fishes (Froese & Binohlan, 2000), even though the authors did not define how large a species might be to present sex‐related differences. Females of catfishes phylogenetically related to R. transfasciatus (Heptapteridae and Pimelodidae) usually mature to larger sizes than males ( e.g ., Peixer et al ., 2006 for Pinirampus pirinampu ; Pérez et al ., 2012 for Pseudoplatystoma tigrinum ; Orsi, 2017 for Pimelodella avanhandavae , Pimelodella meeki , Pimelodus maculatus and Pinirampus pirinampu ; Campanha et al ., 2019 for Pimelodus maculatus and Rhamdia quelen ). On the other hand, Moraes et al .…”

Section: Discussionmentioning

confidence: 99%

Traditional approaches to estimate length at first maturity (L₅₀) retrieve better results than alternative ones in a Neotropical heptapterid

Soares

Barros

Freitas

et al. 2020

Journal of Fish Biology

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Length at first maturity (L 50) is an important tool for the management and conservation of fish populations. Traditional approaches based on macroscopic and microscopic maturity staging exhibit high accuracy and precision, while alternative approaches (e.g., I g-based staging, stanza changing point) are less resource-demanding. Herein, we compare four approaches to estimate L 50 in a population of the heptapterid Rhamdioglanis transfasciatus from Atlantic Forest streams. Fish were sampled monthly during a year by using electrofishing. We measured the length (cm), mass (g), and gonad mass (g) of each specimen, then classified their maturity status macroscopically and microscopically. Alternative approaches were strongly discordant from traditional ones. Logistic curves considering mature individuals as those displaying at least 1% of the maximum I g in the sample greatly underestimated L 50 for females and overestimated L 50 for males. The stanza changing point derived from the polyphasic growth model underestimated L 50 in both cases. Despite the increasing development of less onerous approaches, it seems that they are not suitable for all fish populations and the requirements to use such approaches demand further investigation.

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“…To convert the number of individual fish captured (n) to weight (kg), the mean weight of each species obtained from the literature was used (Penha et al, 2004;Campanha et al, 2019;Neto et al, 2019; Agência Nacional de Águas e Saneamento Básico, 2020). Preference was given to mean weight values estimated from fish populations from the Pantanal or from the author's laboratory database (Table S1).…”

Section: Discussionmentioning

confidence: 99%

Temporal dynamic and economic valuation of recreational fisheries of the lower Cuiabá River, Brazilian Pantanal

Massaroli

Araujo

Ortega

et al. 2021

Fisheries Management Eco

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Fisheries are the most common ecosystem service that fish provide to human populations, yet recreational fisheries are often overlooked when evaluating such services. Here, the socioeconomic profiles of fishers, the composition of their catches and catch per unit effort (CPUE) are described, to estimate the economic value of the recreational fishery on a stretch of the Cuiabá River in the Brazilian Pantanal.Questionnaires were used to obtain socioeconomic information and fishing yield from fishers for 2013 and 2014. Additionally, a census on the number of fishers and fishing platforms along the sampled region was conducted in 2018. This recreational fishery mostly involves middle class adult males, based mostly in the Cuiabá city metropolitan region. They invested, on average, US$41.

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LENGTHí WEIGHT RELATIONSHIPS AND BIOLOGICAL ASPECTS FOR 34 FISH SPECIES FROM TRíÅ S IRMÃOS RESERVOIR, LOWER TIETíÅ RIVER BASIN, SP - BRAZIL

Cited by 6 publications

References 12 publications

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Traditional approaches to estimate length at first maturity (L₅₀) retrieve better results than alternative ones in a Neotropical heptapterid

Temporal dynamic and economic valuation of recreational fisheries of the lower Cuiabá River, Brazilian Pantanal

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LENGTHí WEIGHT RELATIONSHIPS AND BIOLOGICAL ASPECTS FOR 34 FISH SPECIES FROM TRí­Å S IRMÃOS RESERVOIR, LOWER TIETí­Å RIVER BASIN, SP - BRAZIL

Cited by 6 publications

References 12 publications

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Insights into the representativeness of biodiversity assessment in large reservoir through eDNA metabarcoding

Traditional approaches to estimate length at first maturity (L50) retrieve better results than alternative ones in a Neotropical heptapterid

Temporal dynamic and economic valuation of recreational fisheries of the lower Cuiabá River, Brazilian Pantanal

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Product

Resources

About

LENGTHí WEIGHT RELATIONSHIPS AND BIOLOGICAL ASPECTS FOR 34 FISH SPECIES FROM TRíÅ S IRMÃOS RESERVOIR, LOWER TIETíÅ RIVER BASIN, SP - BRAZIL

Traditional approaches to estimate length at first maturity (L₅₀) retrieve better results than alternative ones in a Neotropical heptapterid