Individual back-calculated size-at-age based on otoliths from Pacific coral reef fish species

Morat, Fabien; Wicquart, Jérémy; Schiettekatte, Nina M. D.; Sinéty, Guillemette de; Bienvenu, Jean-Guy; Casey, Jordan M.; Brandl, Simon J.; Vii, Jason; Carlot, Jérémy; Degregori, S.; Mercière, Alexandre; Fey, Pauline; Galzin, René; Letourneur, Yves; Sasal, Pierre; Parravicini, Valeriano

doi:10.1038/s41597-020-00711-y

Cited by 9 publications

(4 citation statements)

References 73 publications

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“…Examples already exist where biphasic or Schnute models have been used in Bayesian growth models [ 17 , 23 , 63 ]. Likewise, more sophisticated models can incorporate hierarchical structures [ 16 , 19 , 22 , 64 ], identify growth morphs [ 54 ], account for autocorrelation in back calculations [ 65 ], or examine environmental drivers [ 64 , 66 ]. The framework we have presented sits alongside this existing body of research by providing an entry point to Bayesian growth modelling that can be applied to standard growth modelling scenarios.…”

Section: Discussionmentioning

confidence: 99%

Modernising fish and shark growth curves with Bayesian length-at-age models

Smart

Grammer

2021

PLoS ONE

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Growth modelling is a fundamental component of fisheries assessments but is often hindered by poor quality data from biased sampling. Several methods have attempted to account for sample bias in growth analyses. However, in many cases this bias is not overcome, especially when large individuals are under-sampled. In growth models, two key parameters have a direct biological interpretation: L0, which should correspond to length-at-birth and L∞, which should approximate the average length of full-grown individuals. Here, we present an approach of fitting Bayesian growth models using Markov Chain Monte Carlo (MCMC), with informative priors on these parameters to improve the biological plausibility of growth estimates. A generalised framework is provided in an R package ‘BayesGrowth’, which removes the hurdle of programming an MCMC model for new users. Four case studies representing different sampling scenarios as well as three simulations with different selectivity functions were used to compare this Bayesian framework to standard frequentist growth models. The Bayesian models either outperformed or matched the results of frequentist growth models in all examples, demonstrating the broad benefits offered by this approach. This study highlights the impact that Bayesian models could provide in age and growth studies if applied more routinely rather than being limited to only complex or sophisticated applications.

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Section: Discussionmentioning

confidence: 99%

Modernising fish and shark growth curves with Bayesian length-at-age models

Smart

Grammer

2021

PLoS ONE

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“…Although constrained by genetic variation and evolutionary history, an organism's energy allocation is a trade‐off between growth, survival and reproduction in response to different environmental conditions (Dahlke et al ., 2020; Mims & Olden, 2012; Partridge & Harvey, 1988). Even for the same species of fish, the population characteristics formed under different environmental conditions will be different (Araya et al ., 2005; Morat et al ., 2020). Food availability, habitat characteristics, fishing pressure and interspecific competition may affect the population characteristics (Dunlop et al ., 2005; Michaletz, 2017).…”

Section: Introductionmentioning

confidence: 99%

Age, growth, reproduction and status of resource development of Ptychidio jordani, a critically endangered freshwater fish in the Hongshui River, China

Huang

et al. 2023

Journal of Fish Biology

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The age, growth, reproduction and resource development status of Ptychidio jordani, as a critically endangered freshwater fish in the Hongshui River, China, was studied in this work. A total of 525 specimens were collected monthly using the cages and gillnets from October 2021 to September 2022 in the Hongshui River. The scale was used for age determination, and the maximum age for both female and male was estimated to be 5 years and 3 years, respectively. Female and male P. jordani showed different growth patterns, which were expressed as Lt = 261.3 (1‐e−0.4885(t−0.1476)) and Lt = 251.2 (1‐e−0.4758(t+0.9643)), respectively. The overall sex ratio was 1:0.47 (female:male). Female attained sex maturity at 2.34 years (192 mm body length). Month variation of the gonad somatic index indicated that the spawning period occurred from April to October. The absolute fecundity was estimated at 9046 ± 3434 eggs per individual, and the relative fecundity was 38.08 ± 15.77 eggs per gram. The exploitation rate of female and male was 0.233 and 0.495, which indicated that P. jordani was not overfishing. This study provided data on the key life‐history traits of P. jordani, which has not been known previously and is essential for conservation strategy and policy development.

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“…However, traditional fishery resource assessments are usually based on fixed growth parameters. This might lead to inappropriate decisions regarding fishery management and increase the risk of fishery management [5,6]. Therefore, understanding the specific age structure and growth parameters of different populations is important for improving fishery resource management [7].…”

Section: Introductionmentioning

confidence: 99%

Comparative Population Dynamics of Schizothorax wangchiachii (Cyprinidae: Schizothoracinae) in the Middle Reaches of the Yalong River and the Upper Reaches of the Jinsha River, China

Gao

Chen

et al. 2023

Animals

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To explore the differences in the growth characteristics and population dynamics of Schizothorax wangchiachii populations in the Jinsha River (JSR) and the Yalong River (YLR), samples were collected in the upper reaches of the JSR (n = 230) from 2019 to 2020 and the middle reaches of the YLR (n = 187) from 2017 to 2018. In the JSR and YLR populations, the age range was 11 and 12 years old, respectively, and the best growth equation was the Von Bertalanffy equation. The comparative analysis of the two populations showed that the growth coefficient, initial sexual maturity age and age at first capture of the YLR population were greater than those of the JSR population. Comparing the mortality rates of the two groups, we found that the YLR population had the higher female mortality rate (0.658 years−1) and the lower male mortality rate (0.453 years−1). Our assessment of the three natural mortality rates showed that the Fcur of both male and female populations was greater than F25%, indicating that both populations were in an overexploited state. Therefore, we suggest considering the two groups as separate protection units and implementing management measures such as ecological regulation, restoration of tributary habitat and strengthening of fishing ban monitoring to protect their resources.

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Individual back-calculated size-at-age based on otoliths from Pacific coral reef fish species

Cited by 9 publications

References 73 publications

Modernising fish and shark growth curves with Bayesian length-at-age models

Modernising fish and shark growth curves with Bayesian length-at-age models

Age, growth, reproduction and status of resource development of Ptychidio jordani, a critically endangered freshwater fish in the Hongshui River, China

Comparative Population Dynamics of Schizothorax wangchiachii (Cyprinidae: Schizothoracinae) in the Middle Reaches of the Yalong River and the Upper Reaches of the Jinsha River, China

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