Potential use of otolith weight for the determination of age-structure of Baltic cod (Gadus morhua) and plaice (Pleuronectes platessa)

Cardinale, Massimiliano; Arrhenius, Fredrik; Johnsson, B.

doi:10.1016/s0165-7836(99)00122-8

Cited by 54 publications

(83 citation statements)

References 17 publications

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“…measurement of process, and a technique often used. There are numerous studies on the subject (Cardinale et al, 2000;Pino et al, 2004;Gümüs et al, 2007;Bostanci, 2009;Bostanci & Polat, 2011;Keskin, 2013). However, the linear correlation between total length and otolith length can be stronger than the relationship between total length and otolith weight.…”

Section: Resultsmentioning

confidence: 99%

Morphological and Biometrical Characteristics on Otolith of Barbus tauricus Kessler, 1877 on Light and Scanning Electron Microscope

Kontaş

Bostancı

2015

Int. J. Morphol.

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SUMMARY:The otolith morphology, biometry and the relationship between the otolith size and fish length were examined. The weight, length, width, area and perimeter were recorded for each pair of otoliths. The values of form factor (FF), roundness (RD), aspect ratio (AR), circularity (C), rectangularity (R) and elipticity (E) were calculated and the relationships between otolith length (OL) and shape indices were showed with graphics. According to paired t-test results, difference between right and left otoliths was important statistically (P<0.05), except otolith length. It is the first time, the difference of otolith variables were observed not only right and left pairs but also females and males of fish a member of Cyprinidae. While the otolith weight had the lowest coefficient of determination (r 2 ) such as 0.69; 0.59; 0.65, otolith length had the highest 0.80; 0.81; 0.80, for female, male and all specimens, respectively. In addition, SEM images were firstly shown for otoliths of B. tauricus to determine the otolith morphology.

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Section: Resultsmentioning

confidence: 99%

Morphological and Biometrical Characteristics on Otolith of Barbus tauricus Kessler, 1877 on Light and Scanning Electron Microscope

Kontaş

Bostancı

2015

Int. J. Morphol.

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“…2). Unlike fish length and otolith size, otolith weight is a good indicator of fish age because it continues to increase throughout the life of the fish (Cardinale et al 2000). Finally, the fact that variability between readers was so low for red snapper throughout all age classes indicates that age estimates derived from otolith sections of red snapper are valid throughout its life history (Wilson and Nieland in press).…”

Section: Discussion-radiocarbon Chronologies Based On Ams ⌬mentioning

confidence: 99%

Use of bomb radiocarbon to validate otolith section ages of red snapper Lutjanus campechanus from the northern Gulf of Mexico

Baker

Wilson

2001

Limnology & Oceanography

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The red snapper Lutjanus campechanus is an important recreational and commercial fish species in the northern Gulf of Mexico. Management approaches have varied in part because of uncertainty of their longevity. Snapper ages have been based on presumed otolith annuli; however, this methodology has not been validated for all age classes. A recent technique to validate otolith age utilizes the increase in oceanic 14C resulting from atmospheric testing of nuclear bombs during the 1950s and 1960s. Analyses of annuli from living corals and fish otoliths from 1900 to the present have documented that elevated 14C input has occurred throughout the world's oceans. We validated otolith section age estimates through accelerator mass spectrometry analysis of bomb‐produced 14C in red snapper (otoliths) hatched before, during, and after the nuclear testing periods. Delta 14C data from the otoliths of red snapper with presumed birth dates between 1960 and 1973 clearly reflect the sharp increase in oceanic radiocarbon attributable to previous nuclear testing. Similarities between the otolith and nearby coral △14C chronologies suggest that annulus‐based age estimates of red snapper are valid on average to within 1–3 yr. In addition, this study provides the first carbonate bomb radiocarbon time series from the northern Gulf of Mexico.

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“…Interpreting annual growth rings in otoliths, as done in our study, is possibly the most accurate technique for estimating individual fish age, but many authors have pointed to its drawbacks-it is labour intensive, time consuming, expensive and dependent on readers' experience (Boehlert and Yoklavich 1998, Cardinale et al 2000, Pilling et al 2003, Pino et al 2004, Ross et al 2005, Steward et al 2009). Several studies have demonstrated that otolith size can be used as a proxy for otolith ring counts in ageing fish, although some otolith dimensions may be more useful than others (Steward et al 2009 and references therein).…”

Section: Discussionmentioning

confidence: 87%

“…Worthington et al (1995) argued that, for ageing large samples, the lower costs of these models can outweigh any advantages of more precise ageing methods applied to smaller samples, while Cardinale et al (2000) suggested that a technique with a constant error, such as a morphometric model, may be better for evaluating population structure over time than a technique with variable error owing, for example, to changes in otolith readers. In our case, measuring and weighing otoliths required considerably less time than polishing and counting annual rings, while producing very similar age estimates.…”

Section: Discussionmentioning

confidence: 99%

Age, growth and utility of otolith morphometrics as a predictor of age in the wrasse <i>Coris julis</i> (Labridae) from the eastern Adriatic Sea

Škeljo¹,

Ferri²,

Brčić³

et al. 2012

Sci. Mar.

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SUMMARY: Age and growth of Coris julis were determined by examining sagittal otoliths belonging to fish sampled between November 2008 and October 2009 in the eastern Adriatic Sea (north-central Mediterranean Sea). A total of 1102 specimens (528 males, 487 females and 87 individuals of indeterminate sex), ranging from 48 to 222 mm total length were analysed. Ninety-two per cent of the otoliths were readable and 68% of the specimens had two readings in agreement. Counting of daily rings revealed that the second opaque ring represents the first annulus (315.1±27.8 daily rings). The maximum observed age was 7 years for males and 5 years for females, with males dominating in higher age classes (>3 years) and females in age classes 1 + and 2 + . Growth was described by the von Bertalanffy growth curves and significant differences were found between males (L ∞ =29.10 cm, k=0.12 and t 0 =-1.48) and females (L ∞ =21.27 cm, k=0.21 and t 0 =-1.08). Otolith mass, length, width and thickness were determined for the otoliths belonging to 465 fish and the utility of these morphometrics as a predictor of age was evaluated. The most precise age estimations were obtained from the otolith length data, followed by the otolith mass.KEY WORDS: age, growth, daily rings, otolith morphometrics, Coris julis, Adriatic Sea. RESUMEN: Edad, crEcimiEnto y utilidad dE la morfomEtría dE los otolitos como prEdictor dE la Edad En El pEz Coris julis (labridaE) dEl adriático oriEntal. -Se determinó la edad y se estimaron los parámetros de crecimiento de Coris julis basados en el análisis de los otolitos sagita de ejemplares capturados en el Adriático oriental (Norte del Mediterráneo central) entre noviembre de 2008 y octubre de 2009. Se examinó un total de 1.102 ejemplares (528 machos, 487 hembras, y 87 con sexo indeterminado), con tallas que oscilaron entre 48 y 222 mm de longitud total. El 92% de los otolitos analizados resultó legible y las lecturas fueron realizadas por dos lectores concordando en el 68 % de los individuos. El recuento de los incrementos diarios revelaron que el segundo anillo opaco corresponde al primer año (315,1±27,8 incrementos diarios). La edad máxima observada fue de 7 años para los machos y 5 años para las hembras. Los machos eran dominantes en las clases de edad más alta (>3 años) y las hembras en las clases de edad 1 + y 2 + . El crecimiento se determinó mediante el modelo de von Bertalanffy y los parámetros de crecimiento estimados para los machos (L ∞ =29.10 cm, k=0.12 and t 0 =-1.48) y las hembras (L ∞ =21.27 cm, k=0.21 and t 0 =-1.08) fueron significativamente diferentes. La masa de los otolitos, la longitud, la anchura y el espesor se determinaron para los 465 otolitos y se ha evaluado la utilidad de estas medidas morfometrícas como un predictor de edad. Las estimaciones más precisas de edad se obtuvieron a partir de la longitud de los otolitos, y en segundo lugar por la masa de los otolitos.

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Potential use of otolith weight for the determination of age-structure of Baltic cod (Gadus morhua) and plaice (Pleuronectes platessa)

Cited by 54 publications

References 17 publications

Morphological and Biometrical Characteristics on Otolith of Barbus tauricus Kessler, 1877 on Light and Scanning Electron Microscope

Morphological and Biometrical Characteristics on Otolith of Barbus tauricus Kessler, 1877 on Light and Scanning Electron Microscope

Use of bomb radiocarbon to validate otolith section ages of red snapper Lutjanus campechanus from the northern Gulf of Mexico

Age, growth and utility of otolith morphometrics as a predictor of age in the wrasse <i>Coris julis</i> (Labridae) from the eastern Adriatic Sea

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