Comparing the accuracy and precision of novel bootstrapped length-frequency and length-at-age (otolith) analyses, with a case study of lane snapper (Lutjanus synagris) in the SW Atlantic

Schwamborn, Ralf; Freitas, Matheus Oliveira; Moura, Rodrigo L.; Aschenbrenner, Alexandre

doi:10.1016/j.fishres.2023.106735

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…Currently, there is a lack of data on the structure and status of stocks of many commercially exploited species, such as catfish, snapper, and hake, representing a significant portion of the annual catches of artisanal and industrial fleets in Maranhão. However, only for L. synagris information on otolith morphometry and isotopic composition was used in the identification and discrimination of stocks in subtropical waters from the North Atlantic to southern Brazil (Luckhurst et al, 2000;Santos et al, 2022;Schwamborn et al, 2023). Therefore, additional research strategies are needed to fill this knowledge gap and strengthen the foundations for even more sustainable fisheries management in regions where these species occur.…”

Section: Sample Collectionmentioning

confidence: 99%

Morphometry and morphology of fish otoliths on the coast of the state of Maranhão, Brazil

Santos,

Silva,

Silva

et al. 2024

Braz. J. Biol.

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The main objective of this study was to evaluate the biometric relationships between the species Bagre bagre, Lutjanus synagris and Nebris microps and their otoliths. The relationship between the size of the otolith (length and weight) and the size of the fish (standard length and total weight) was determined using the linear regression model (y = a + bx). For the morphological description, the otoliths of three specimens were selected by standard length class (10mm). The morphological characters analyzed were chosen according to traditional literature. Three hundred eight specimens of B. bagre, 200 of L. synagris and 237 of N. microps were analyzed. Throughout the collection period, the source of the capture of individuals was the municipality of Raposa. The linear correlations for fish and otolith length for B. bagre were 0.9129 and 0.9652, respectively. For L. synagris, the coefficients were 0.8634 and 0.8672, while for N. microps, 0.9597 and 0.8636, respectively. The morphological classification of L. synagris and N. microps is of the Saggita type, and the B. bagre species is of the Lapillus type. From the data presented here, it is possible to observe that otolith morphometric and morphological data can serve as a parameter to estimate the relationship between the fish and the otolith in terms of its biomass and the length of an individual and a population.

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Section: Sample Collectionmentioning

confidence: 99%