scholarly journals Age and growth of pompano, Trachinotus ovatus, from the Strait of Messina (central Mediterranean Sea)

2021 ◽  
Vol 85 (3) ◽  
pp. 175-185
Author(s):  
Danilo Malara ◽  
Francesco Longo ◽  
Luca Pagano ◽  
Maria Giulia Stipa ◽  
Teresa Romeo ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Age Estimation ◽  
Growth Models ◽  
Stock Assessment ◽  
Fork Length ◽  
Age And Growth ◽  
Central Mediterranean ◽  
Trachinotus Ovatus ◽  
Von Bertalanffy Model ◽  
The Relationship

This is the first paper to provide detailed information on the age and growth of Trachinotus ovatus. The size of the 244 individuals collected in the Strait of Messina ranged from 2.7 to 30.4 cm in fork length (LF) and 0.31 to 508.6 g in body mass (M). The relationship between these parameters (M - LF) was investigated and showed a good fit. Age estimation based on vertebrae and otoliths yielded similar results, suggesting a maximum age of five years. However, the precision and accuracy tests, such as percentage of agreement (PA), mean coefficient of variation (ACV) and average percent error (APE) indicated that the otolith readings (97.83% PA, 0.54% ACV and 0.38% APE) were more reliable for age estimation than vertebrae readings (82.17% PA, 5.33% ACV and 3.77% APE). The multi-model inference approach allowed us to compare different non-linear growth models. The von Bertalanffy model (L∞=29.139, k=0.496 and t0=−0.347) fitted the length-at-age data best. This species has a relatively rapid growth and an estimated longevity of five to seven years. This information could be used for management and first stock assessment studies on T. ovatus in the Mediterranean Sea.

scholarly journals Selecting the best growth model for elasmobranches

2015 ◽  
Author(s):  
Kwang-Ming Liu ◽  
Chiao-Bin Wu ◽  
Shoou-Jeng Joung ◽  
Wen-Pei Tsai
Keyword(s):  
Growth Model ◽  
Growth Models ◽  
Stock Assessment ◽  
Gompertz Model ◽  
Information Criterion ◽  
Age And Growth ◽  
Deep Waters ◽  
Extended Longevity ◽  
Best Fit ◽  
Two Parameter

Age and growth information is essential for accurate stock assessment of fish, and growth model selection may influence the result of stock assessment. Previous descriptions of the age and growth of elasmobranches relied mainly on the von Bertalanffy growth model (VBGM). However, it has been noted that sharks, skates and rays exhibit significant variety in size, shape, and life-history traits. Given this variation, the VBGM may not necessarily provide the best fit for all elasmobranches. This study attempts to improve the accuracy of age estimates by testing four growth models—the VBGM, two-parameter VBGM, Robertson (Logistic) and Gompertz models—to fit observed and simulated length-at-age data for 37 species of elasmobranches. The best growth model was selected based on corrected Akaike’s Information Criterion (AICc), the AICc difference, and the AICc weight. The VBGM and two-parameter VBGM provide the best fit for species with slow growth and extended longevity (L∞ > 100 cm TL, 0.05 < k < 0.15 yr-1), such as pelagic sharks. For fast-growing small sharks (L∞ < 100 cm TL, kr or kg > 0.2 yr-1) in deep waters and for small-sized demersal skates/rays, the Robertson and the Gompertz models provide the best fit. The best growth models for small sharks in shallow waters are the two-parameter VBGM and the Robertson model, while all the species best fit by the Gompertz model are skates and rays.

scholarly journals Queen triggerfish Balistes vetula: Validation of otolith-based age, growth, and longevity estimates via application of bomb radiocarbon

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0262281
Author(s):  
Virginia R. Shervette ◽  
Jesús M. Rivera Hernández
Keyword(s):  
Age Estimation ◽  
Atlantic Coast ◽  
Fork Length ◽  
Growth Function ◽  
Age And Growth ◽  
Future Research ◽  
Fisheries Science ◽  
Fish Samples ◽  
Age Estimates

Ensuring the accuracy of age estimation in fisheries science through validation is an essential step in managing species for long-term sustainable harvest. The current study used Δ14 C in direct validation of age estimation for queen triggerfish Balistes vetula and conclusively documented that triggerfish sagittal otoliths provide more accurate and precise age estimates relative to dorsal spines. Caribbean fish samples (n = 2045) ranged in size from 67–473 mm fork length (FL); 23 fish from waters of the southeastern U.S. (SEUS) Atlantic coast ranged in size from 355–525 mm FL. Otolith-based age estimates from Caribbean fish range from 0–23 y, dorsal spine-based age estimates ranged from 1–14 y. Otolith-based age estimates for fish from the SEUS ranged from 8–40 y. Growth function estimates from otoliths in the current study (L∞ = 444, K = 0.13, t0 = -1.12) differed from spined-derived estimates in the literature. Our work indicates that previously reported maximum ages for Balistes species based on spine-derived age estimates may underestimate longevity of these species since queen triggerfish otolith-based ageing extended maximum known age for the species by nearly three-fold (14 y from spines versus 40 y from otoliths). Future research seeking to document age and growth population parameters of Balistes species should strongly consider incorporating otolith-based ageing in the research design.

scholarly journals Age and growth of the dog snapper Lutjanus jocu (Bloch & Schneider, 1801) in Abrolhos Bank, Northeastern Brazil

2011 ◽  
Vol 9 (2) ◽  
pp. 393-401 ◽  
Author(s):  
Marília Previero ◽  
Carolina V. Minte-Vera ◽  
Matheus Oliveira Freitas ◽  
Rodrigo Leão de Moura ◽  
Claudenice Dei Tos
Keyword(s):  
Growth Parameters ◽  
Growth Models ◽  
Fork Length ◽  
Age And Growth ◽  
Northeastern Brazil ◽  
Constant Variance ◽  
Males And Females ◽  
Average Size ◽  
Constant Coefficient Of Variation ◽  
Estuarine Region

We determined the age and growth of the dog snapper (Lutjanus jocu), caught in the region of Abrolhos Bank, Bahia State, by the fishermen from coastal communities of Prado, Alcobaça, Caravelas, and Nova Viçosa. We examined 205 sectioned otoliths of fish caught by harpoon, longline, hand line, and gill nets (14.5 to 79.5 cm fork length). The formation of each ring was considered annual. The sectioned otoliths showed between 0 and 29 rings. Nearly half of the analyzed specimens had between 0 and 7 rings (88 of 205). Fish caught with nets in the estuarine region were the juvenile, while fish caught with lines and harpoons were the oldest. Two von Bertalanffy growth models were fitted to length-at-age data: one assuming constant variance of length-at-age (SVB) and another assuming constant coefficient of variation, i.e. variance increasing as a function of average size (CVVB). The SVB estimates were Loo = 87.82 cm, K = 0.10, and t0 = -1.486 and the CVVB estimates were Loo = 117.60 cm, K = 0.06, and t0 = -2.470. The largest Loo values estimated by the CVVB model are supported by reports from the literature of larger animals occurring in the deeper outer shelf of Abrolhos Bank. Growth parameters were also estimated for males and females separately (SVB model) (Loo = 92.80 cm, K = 0.099, and t0 = -1.680 for males, and Loo = 82.10 cm, K = 0.105, and t0 = -1.570 for females).

scholarly journals Progress in determining southern blue whiting (Micromesistius australis) target strength: results of swimbladder modelling

2006 ◽  
Vol 63 (5) ◽  
pp. 952-955 ◽  
Author(s):  
Adam J. Dunford ◽  
Gavin J. Macaulay
Keyword(s):  
Gadus Morhua ◽  
Stock Assessment ◽  
Laser Scanner ◽  
Fork Length ◽  
Sensitivity Analyses ◽  
Target Strength ◽  
Fish Length ◽  
Angle Distribution ◽  
Blue Whiting ◽  
The Relationship

Abstract Southern blue whiting target strength (TS) results from Kirchhoff modelling of swimbladder casts scanned using a hand-held 3D laser scanner are presented. The data are compared with the relationship between TS and fish length used for New Zealand stock-assessment surveys; TS = 21.8 log10(fork length) − 72.8, at 38 kHz. This relationship has its origins in the relationship used for blue whiting (Micromesistius poutassou) in the northern hemisphere, and is based on measurements on juvenile cod (Gadus morhua). The results indicate that the blue whiting relationship is not appropriate for southern blue whiting, and suggest a much steeper slope, with TS = 38 log10(fork length) − 97, at 38 kHz. Sensitivity analyses indicate that further investigations of swimbladder tilt-angle distribution and swimbladder volume are unlikely to provide evidence to support the use of the blue whiting relationship for southern blue whiting.

Age and growth of pearly razorfish, Xyrichtys novacula (Linnaeus 1758), in the central Mediterranean Sea

2010 ◽  
Vol 26 (3) ◽  
pp. 410-415 ◽  
Author(s):  
P. Battaglia ◽  
L. Castriota ◽  
P. Consoli ◽  
M. Falautano ◽  
T. Romeo ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Age And Growth ◽  
Central Mediterranean ◽  
Central Mediterranean Sea

scholarly journals Nurseries, spawning grounds and recruitment of Octopus vulgaris in the Strait of Sicily, central Mediterranean Sea

2010 ◽  
Vol 67 (7) ◽  
pp. 1363-1371 ◽  
Author(s):  
Germana Garofalo ◽  
Luca Ceriola ◽  
Michele Gristina ◽  
Fabio Fiorentino ◽  
Roberta Pace
Keyword(s):  
Mediterranean Sea ◽  
Environmental Parameters ◽  
Octopus Vulgaris ◽  
Northwestern Part ◽  
Central Mediterranean ◽  
Spawning Grounds ◽  
Strait Of Sicily ◽  
Central Mediterranean Sea ◽  
Distance Weighted ◽  
The Relationship

Abstract Garofalo, G., Ceriola, L., Gristina, M., Fiorentino, F., and Pace, R. 2010. Nurseries, spawning grounds and recruitment of Octopus vulgaris in the Strait of Sicily, central Mediterranean Sea. – ICES Journal of Marine Science, 67: 1363–1371. The presence of nursery and spawning grounds and the relationship between sea surface temperature (SST) and the abundance of juvenile O. vulgaris in the Strait of Sicily, central Mediterranean, are investigated using fishery-independent data (trawl surveys, 1994–2008). Annual distributions were generated for mature animals and juveniles for spring/summer (the peak spawning season) and autumn (peak recruitment) using an inverse distance weighted deterministic interpolation. Based on the persistence of abundant recruits and mature animals, respectively, nursery and spawning grounds were identified. The correlation between annual recruitment and SST during hatching and recruitment was also investigated. Concentrations of juveniles (nurseries) were located off the southwest coast of Sicily and in the central Strait of Sicily, including south of Lampedusa on the African shelf, but just one consistent concentration of mature animals (spawning grounds) was found in the northwestern part of the Strait. There was a significant positive correlation between recruitment and SST. Results are discussed in the light of environmental parameters, and a hypothesis on possible stock units in the area was developed. The direct and indirect effects of SST variation on the recruitment process were also examined.

scholarly journals Reproduction and Sexual Maturity of European Sardine (Sardina pilchardus) in the Central Mediterranean Sea

2021 ◽  
Vol 8 ◽  
Author(s):  
Gualtiero Basilone ◽  
Rosalia Ferreri ◽  
Salvatore Aronica ◽  
Salvatore Mazzola ◽  
Angelo Bonanno ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Sexual Maturity ◽  
Goodness Of Fit ◽  
Stock Assessment ◽  
Peer Review Process ◽  
Fish Population ◽  
Size At Maturity ◽  
Sardina Pilchardus ◽  
Central Mediterranean ◽  
Central Mediterranean Sea

Understanding drivers of fish maturity is essential to predict the productivity, stability, and resiliency of exploited populations. Size at maturity for European sardine (Sardina pilchardus) in the Central Mediterranean Sea has never been published within rigorous peer review process. In the past, stock assessment working groups in the Mediterranean requested such information; however, the size at which 50% of the fish population reaches the sexual maturity (L50) often received weak estimates based on a single or few years of observation, which do not necessarily reflect the whole stock. To address this data gap for the Central Mediterranean Sea, the present research estimated size at maturity of European sardine in the Strait of Sicily. In the study period (2009–2017), sampled individuals exhibited significant differences in size range as well as in body condition and reproductive effort. Data also permitted a clear identification of the spawning season, starting in September–October and ending in March–April the following year. Along the analyzed period, the size at first maturity ranged from 108 to 124 mm (total length) for females and from 102 to 122 mm for males. Significant differences were recorded among genders and years. Moreover, a goodness-of-fit measure was proposed to assess the robustness and reliability of L50 estimates, and thus selecting those that minimize the fitting-associated errors. Finally, results suggested that the low proportion of immature individuals in the samples represents the main source of bias in L50 estimation and possible solution was also proposed.

Age and growth of Australian grayling, Prototroctes maraena Gnnther (Salmoniformes : Prototroctidae), in the Tambo River, Victoria

1983 ◽  
Vol 34 (3) ◽  
pp. 451 ◽  
Author(s):  
TM Berra ◽  
PL Cadwallader
Keyword(s):  
Age Determination ◽  
Fork Length ◽  
Age And Growth ◽  
Scale Growth ◽  
Length Frequency ◽  
Age Classes ◽  
Frequency Distributions ◽  
Overall Ratio ◽  
The Relationship ◽  
Australian Grayling

The age and growth of Australian grayling were studied in 1203 individuals collected from the Tambo River, Victoria, between January and November 1979. Scales from 667 grayling were examined. The scale method of age determination was validated by the analysis of seasonal changes in the pattern of scale growth and by correspondence between ages inferred from length-frequency distributions and ages determined by scale readings. One annulus is formed on the scale by October. Most (88%) grayling belonged to the 1+ and 2+ age-classes; fish aged 3+ and 4+ made up 11% of the collection, and fish aged 5+ less than 1%. Size increased from January until May; growth ceased during winter and resumed in September. There was no difference in growth between the sexes. The largest grayling collected was a female of 253 mm fork length (Lf). The overall length-weight relationship was W = 2 715 × 10-6Lf3 2764. The relationship between total length (Lt) and Lf was Lt = 0.93 16 + 1.0742 Lf, and between standard length (Ls) and Lf was Ls = 0.8007 + 0.9095 Lf The overall ratio of males to females was 56 : 44.

Effect of Individual Variability on the von Bertalanffy Growth Equation

1980 ◽  
Vol 37 (2) ◽  
pp. 241-247 ◽  
Author(s):  
K. J. Sainsbury
Keyword(s):  
Growth Models ◽  
Growth Increment ◽  
Mean Value ◽  
Individual Variability ◽  
Age And Growth ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Von Bertalanffy Model ◽  
The Mean ◽  
Von Bertalanffy Growth Equation

The growth in length of a group of animals is examined. Each animal is assumed to grow according to the von Bertalanffy model with fixed parameters, but these parameters are allowed to differ between individuals. Equations governing the mean and variance of length at given age and growth increment at given length are provided, and their implications discussed. Results indicate that the traditional growth equation is likely to result in an underestimate of the mean value of K when either length at age or growth increment data are analyzed. This problem does not appear serious when using length at age data. However, the problems of interpretation are more serious in the case of growth increment data where serious overestimates of the reconstructed mean length at age can result. A thorough analysis of growth cannot be made for a population exhibiting individual variability in L∞ and K from growth increment data alone. In particular a nonlinear relationship between growth increment and initial length does not necessarily imply that the von Bertalanffy model is inappropriate to the species in question. A topic urgently in need of examination is the form of the joint distribution of K and L∞ in animal populations.Key words: von Bertalanffy, growth models

Sign in / Sign up

Export Citation Format

Share Document