On the validity and precision of back-calculation of growth from otoliths of the plaice, Pleuronectes platessa L.

Rijnsdorp, A.D.; Leeuwen, P.I. van; Visser, T.A.M.

doi:10.1016/0165-7836(90)90058-4

Cited by 26 publications

(13 citation statements)

References 11 publications

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“…In a general way, the validity of the back calculation method depends on the accuracy of the age determinations and the selection of valid body sizeotolith size relationship (Rijnsdorp et al, 1990). Another good tool in the selection of the appropriated back calculation model (linear, curvilinear or other mathematical function) to describe body size and otolith size relationship is the verification of variances homogeneity through the plot of residuals vs. fitted data (Francis, 1990).…”

Section: Discussionmentioning

confidence: 99%

Age, growth and mortality of dog snapper Lutjanus jocu (Bloch & Schneider, 1801) in the northeast coast of Brazil

Rezende¹,

Ferreira

2004

Braz. j. oceanogr.

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fish were sampled (n=3.539) in the northeast portion of the Brazilian Exclusive Economic Zone. Sagitta otoliths were extracted from a sub sample of 216 individuals caught around the oceanic bank Sirius (03°59' s; 35°59' w) and over continental shelf from Ceará (05°03's; 36°02'w) to Bahía States (09°01's; 35°12'w). Opaque bands, presumed to be annual, were observed on whole (n= 210) and sectioned (n= 197) otoliths, showing ages from 0 to 20 and from 0 to 25 years respectively. The von Bertalanffy growth model was fit to length-at-age data resulting in the values of L∞= 77.22 cm, K= 0.110 and t 0 = -3.73. Incremental widths from the first to twentieth opaque band on sectioned otoliths (n = 39) were used on back calculation of length-at-ages and the estimated values were L∞= 71,20 cm, K= 0.112 e t 0 = -4.32. Otolith reading from sections is a reliable technique for aging L. jocu, which presented medium to high longevity and slow growth. Total mortality (Z) estimated by the catch curve was 0.134 corresponding to an annual survival rate of 87.5%. The natural mortality (M) estimated by the Ault et al. (1998) methodology was 0.12 for 25 years of longevity. R E S U M OIdade e crescimento do Lutjanus jocu foi determinada através da leitura de marcas de aposição em otólitos sagittae. 216 indivíduos, capturados no entorno da montanha oceânica Sirius e na plataforma continental do Ceará (05°03's; 36°02'w) até a Bahia (09°01's; 35°12'w) tiveram seus otólitos extraídos. Marcas opacas que provavelmente formam-se anualmente foram observadas em otólitos inteiros (n=210) e em otólitos seccionados (n=197) apresentando peixes com idades entre 0 a 20 e 25 anos respectivamente. O modelo de crescimento de Bertalanffy ajustado por métodos não lineares dos mínimos quadrados aos dados de idade e comprimento resultou em valores de L∞= 77,22 cm, K= 0,110 and t 0 = -3,73. Medidas incrementais da 1ª a 20ª marca opaca em otólitos seccionados (n=39) foram usadas para retrocalcular os comprimentos e as respectivas idades resultando em valores de L∞= 71,20 cm, K= 0,112 e t 0 = -4,32. Leitura de otólitos seccionados de L. jocu é uma técnica confiável para a determinação da idade e crescimento desta espécie, que apresentou longevidade de média a alta com crescimento lento. A taxa de mortalidade total (Z) estimada através da curva de captura foi 0,134 correspondendo a 87,5% de sobrevivência anual. A mortalidade natural (M) calculada pelo método de Ault et al. (1998) foi 0,12 para uma longevidade de 25 anos.

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Section: Discussionmentioning

confidence: 99%

Age, growth and mortality of dog snapper Lutjanus jocu (Bloch & Schneider, 1801) in the northeast coast of Brazil

Rezende¹,

Ferreira

2004

Braz. j. oceanogr.

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“…The measurements were all taken using the main axis of growth of the otolith.The length at the time of annulus formation L, was calculated according to where L, = length at capture; Oi = otolith diameter of the ith annulus in the otolith; 0, = diameter of the total otolith; a = proportionality coefficient; and P = backcalculation coefficient estimated from the relationship between fish length and otolith width (P = 1.364). Rijnsdorp et al (1990) presented evidence for the validity and accuracy of the back-calculation method and further showed that the time of annulus formation corresponds to 1 April.…”

Section: Methodsmentioning

confidence: 99%

Density-dependent and independent changes in somatic growth of female North Sea plaice Pleuronecles platessa between 1930 and 1985 as revealed by back-calculation of otoliths

Rijnsdorp¹,

Leeuwen²

1992

Mar. Ecol. Prog. Ser.

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Changes in the somatic growth of female plaice Pleuronectes platessa L. between 1930 and 1985 is studied by back-calculation of otoliths. It is shown that in the period 1940-49 growth rate was reduced, which coincided with a 3-fold increase in the plaice stock due to the closure of the fishery during the second world war. The growth reduction was largest in large fish (>45 cm) as compared to medium sized fish (30-40 cm), but could not be detected in the size classes c 20 cm. In large plaice the growth reduction occurred later in time as compared to the medium sized fish. Growth in the immediate pre-and post-war years appeared to be sim~lar. At some time in the 1950s and 1960s a growth acceleration started in the size classes up to 30 cm, levelling off in the 1970s. This growth acceleration was largest in the smallest size classes. Within the period of growth acceleration, the 1963 year class. whlch was about 3 times the average year class strength, showed a slight but significant reduction in growth. The reduction in growth was restricted to size classes c 3 0 cm and was 1a.rgest in smaller fish. It is concluded that growth rate in plaice is reduced at high density both in the juvenile phase (pre-war period and year class 1963) and in the adult phase (period 1940-49). The increase in growth of juven~le plaice starting in the 1950s appears to be related to an increase in the availability of food in the coastal waters of the southern North Sea.

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“…The lengthat-age was estimated by relating the proportion of the distance between growth zones relative to the total size of the otolith, to the length of the fish when it was caught. Evidence for the validity of the methods for ageing and for estimating length increments is given by Rijnsdorp et al (1990), including a discussion on their precision and accuracy.…”

Section: Data Collectionmentioning

confidence: 99%

Fisheries-induced trends in reaction norms for maturation in North Sea plaice

Grift¹,

Rijnsdorp²,

Barot³

et al. 2003

Mar. Ecol. Prog. Ser.

194

229

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On the validity and precision of back-calculation of growth from otoliths of the plaice, Pleuronectes platessa L.

Cited by 26 publications

References 11 publications

Age, growth and mortality of dog snapper Lutjanus jocu (Bloch & Schneider, 1801) in the northeast coast of Brazil

Age, growth and mortality of dog snapper Lutjanus jocu (Bloch & Schneider, 1801) in the northeast coast of Brazil

Density-dependent and independent changes in somatic growth of female North Sea plaice Pleuronecles platessa between 1930 and 1985 as revealed by back-calculation of otoliths

Fisheries-induced trends in reaction norms for maturation in North Sea plaice

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