A new model of growth back-calculation incorporating age effect based on otoliths

Morita, Kentaro; Matsuishi, Takashi

doi:10.1139/cjfas-58-9-1805

Cited by 24 publications

(49 citation statements)

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“…Since changes in otolith shape were subtle, our finding is not incompatible with the ubiquitous finding of a positive relationship between somatic and otolith growth (e.g. Messieh 1975, Meekan et al 1998, Vigliola et al 2000, Morita & Matsuishi 2001, since there is often considerable variability in fish-size/otolith-size relationships, particularly at specific ages or at key developmental stages (e.g. Chambers & Leggett 1987, McCormick 1994.…”

Section: Discussionmentioning

confidence: 43%

Feeding history influences otolith shape in tropical fish

Gagliano¹,

McCormick²

2004

Mar. Ecol. Prog. Ser.

112

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The influence of feeding history on otolith shape and symmetry was examined in juveniles of 2 species of coral reef fish, Amphiprion akindynos and Pomacentrus amboinensis. Fast Fourier analysis was used to describe the shape of otoliths of fish from a variety of experimental feeding treatments, ranging from starvation, through pulse feeding, to feeding ad libitum. The resulting harmonics from both the left and right otoliths of each individual fish were used in a multivariate analysis to investigate shape differences among feeding treatments in the 2 species. When left and right otoliths were analysed separately, no significant differences between feeding treatments were revealed for either species. In contrast, when left and right otoliths from individuals were analysed together, clear separations in feeding groups were observed in both species. Differences among feeding treatments were largely due to differences in the finer details of the otolith shape, represented by the middle level harmonics. Fish that had been starved had significantly different otolith shapes than fish from all other treatments. Differences in otolith shape could not simply be attributed to differences in fish size or age among treatments. We conclude that differences in otolith shape are influenced by recent feeding history, but processes that influence otolith shape are complex and most likely species-specific. This study presents new evidence that otolith shape of tropical fish may directly reflect body condition of individuals regardless of fish size and age.

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Section: Discussionmentioning

confidence: 43%

Feeding history influences otolith shape in tropical fish

Gagliano¹,

McCormick²

2004

Mar. Ecol. Prog. Ser.

112

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“…Back-calculated size at annulus formation was determined from fish size at capture, otolith radius, and annular radii using the Frasier-Lee method (see Morita and Matsuishi, 2001):…”

Section: Methodsmentioning

confidence: 99%

Population Changes and Location-Specific Differences for Otolith-Derived Age and Growth of Recreationally Harvested Spotted Seatrout (Cynoscion nebulosus) From Alabama in 2007

Johnson

Bortone

Klement

et al. 2011

goms

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“…Hence, back-calculating body length-at-age calls for caution. In particular, unless we understand how different external factors affect the relationship between scale growth and body growth, applying the biological intercept back-calculation method, which assumes constant proportionality between body growth and scale growth in space and time Morita and Matsuishi, 2001), might produce artifactual patterns. However, although a variety of other back-calculation methods exist (reviewed in , the biological and mechanistic assumptions underlying each of them render their application equally controversial.…”

Section: Discussion: Challenges Inherent To Using Back-calculation Mementioning

confidence: 99%

“…However, although a variety of other back-calculation methods exist (reviewed in , the biological and mechanistic assumptions underlying each of them render their application equally controversial. Despite the remarkable effort invested into reviewing and clarifying back-calculation methods (see for e.g., Morita and Matsuishi, 2001;Schirripa, 2002;Li et al, 2008), the differential merits and limitations of alternative approaches remain difficult to appreciate. …”

Section: Discussion: Challenges Inherent To Using Back-calculation Mementioning

confidence: 99%

Growth and maturation of Korean chum salmon under changing environmental conditions

Urbach¹,

Kang²,

Sukyung³

et al. 2012

Fisheries Research

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Salmon populations in the North Pacific have been subject to major changes in environment and fishing pressure since the early 1980s, including a climate regime shift in 1988-89, the closure of the high-seas fisheries in 1993, and a subsequent climatic event in 1998. In the present work, we evaluate whether any of these three events has triggered changes in the life-history traits of chum salmon (Oncorhynchus keta) from the Namdae River, on the eastern coast of South Korea, using data collected on females and males from 1984 to 2008. We find that the 1988-89 regime shift had the most pervasive effects on female and male maturation schedules and growth. We also demonstrate sex-specific responses: whereas growth showed similar patterns of variation in both sexes, age and length at maturation behaved differently in males and females. Our findings contribute to growing evidence that abrupt transitions in climatic conditions can trigger detectable changes in life-history traits. They also strengthen the observation that biological records of salmon populations of the North Pacific carry a stronger signal for the effects of the 1988-89 regime shift than for the effects of the subsequent environmental changes.

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A new model of growth back-calculation incorporating age effect based on otoliths

Cited by 24 publications

References 0 publications

Feeding history influences otolith shape in tropical fish

Feeding history influences otolith shape in tropical fish

Population Changes and Location-Specific Differences for Otolith-Derived Age and Growth of Recreationally Harvested Spotted Seatrout (Cynoscion nebulosus) From Alabama in 2007

Growth and maturation of Korean chum salmon under changing environmental conditions

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