Daily Otolith increments in juvenile tropical Parrotfishes and Surgeonfishes

1992 ◽  
Vol 43 (5) ◽  
pp. 973 ◽  
Author(s):  
DC Lou ◽  
NA Moltschaniwskyj
Keyword(s):  
Daily Basis ◽  
Island Growth ◽  
Growth Increments ◽  
Otolith Increments ◽  
Lizard Island ◽  
Otolith Increment ◽  
Left And Right ◽  
Possible Cause ◽  
Interobserver Differences ◽  
Age Estimates

Otolith microstructure was examined in juvenile tropical herbivorous fish belonging to the families Acanthuridae and Saridae at Lizard Island. Growth increments on the lapilli of 14 species were validated by tetracycline marking in the laboratory. All species examined deposited growth increments on a daily basis. Increment counts in left and right lapilli were compared for consistency in increment deposition. Interobserver differences were examined as a possible cause of bias in age estimates for Ctenochaetus binotatus and Scarus schlegeli. Given the precision of otolith increment counts by an observer, the differences between counts of the left and right otoliths were acceptable, as were differences between independent observers reading the same otoliths.

Validation of the ageing of 0+ carp (Cyprinus carpio L.)

2003 ◽  
Vol 54 (8) ◽  
pp. 1005 ◽  
Author(s):  
Benjamin B. Smith ◽  
Keith F. Walker
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
South Australia ◽  
Day Range ◽  
Otolith Increments ◽  
Carp Cyprinus Carpio ◽  
Otolith Increment ◽  
Increment Formation ◽  
Scanning Electron ◽  
Age Estimates

Forty carp larvae were reared from eggs spawned in the Torrens River, Adelaide, South Australia, and their otoliths were examined at the time of hatching or at 6, 10, 15 or 20 days after hatching (post-hatch). Using light- and scanning electron microscopy (SEM), otolith increments were counted and compared with known post-hatch ages. Typically, the counts were one day (range 0–2 days) more than the known post-hatch age, but increment formation was daily to at least age 20 days. Thus, age estimates derived from otolith increment counts of wild-caught 0+ carp should be reduced by one day. Comparison with SEM data showed that light microscopy alone offers sufficient resolution for ageing 0+ carp.

Combined hemodynamic overload of the left and right ventricles as a possible cause of interventricular septum preponderance in high blood pressure

1988 ◽  
Vol 116 (2) ◽  
pp. 509-514 ◽  
Author(s):  
Cesare Fiorentini ◽  
Claudia Galli ◽  
Gloria Tamborini ◽  
Paolo Moruzzi ◽  
Marco Berti ◽  
...  
Keyword(s):  
Blood Pressure ◽  
High Blood Pressure ◽  
Interventricular Septum ◽  
Hemodynamic Overload ◽  
Left And Right ◽  
Possible Cause

Age estimation for young bowhead whales (Balaena mysticetus) using annual baleen growth increments

2008 ◽  
Vol 86 (6) ◽  
pp. 525-538 ◽  
Author(s):  
S. C. Lubetkin ◽  
J. E. Zeh ◽  
C. Rosa ◽  
J. C. George
Keyword(s):  
Growth Parameters ◽  
Age Determination ◽  
Population Level ◽  
Exponential Model ◽  
Growth Increment ◽  
Balaena Mysticetus ◽  
Nonlinear Mixed Effects Model ◽  
Bowhead Whales ◽  
Growth Increments ◽  
Age Estimates

We compiled age estimates and baleen plate δ13C data from 86 bowhead whales ( Balaena mysticetus L., 1758). We used previous whale age estimates based on aspartic acid racemization (AAR) and corpora counts to extend the use of δ13C data for age determination from cycle counting to a modified exponential model using annual baleen growth increments. Our approach used the growth increment data from individual whales in a nonlinear mixed effects model to assess both population-level and whale-specific growth parameters. Although age estimates from baleen-based models become less precise as the whales age, and baleen growth and length near steady state, the growth increment model shows promise in estimating ages of bowhead whales 10–13.5 m long with baleen lengths <250 cm, where other techniques are less precise or the data are scarce. Ages estimated using the growth increment data from such whales ranged from 6.4 to 19.8 years.

Daily Growth Increments in Otoliths of Starry Flounder (Platichthys stellatus) and the Influence of Some Environmental Variables in Their Production

1982 ◽  
Vol 39 (7) ◽  
pp. 937-942 ◽  
Author(s):  
Steven E. Campana ◽  
John D. Neilson
Keyword(s):  
Environmental Conditions ◽  
Environmental Variables ◽  
Daily Basis ◽  
Otolith Growth ◽  
Daily Growth ◽  
Environmental Regime ◽  
Starry Flounder ◽  
Daily Increments ◽  
Growth Increments ◽  
Platichthys Stellatus

Tetracycline injected into juvenile starry flounders (Platichthys stellatus) was incorporated into the periphery of the sagittal otoliths within 24 h. The resulting band, visible under ultraviolet light, was used as a dated mark on the otolith growth increments. This technique was used to verify that increments were laid down on a daily basis, both in field and laboratory environments. Subdaily increments were visible in otoliths of fishes reared under most environmental conditions. The production of daily increments in juvenile starry flounders preconditioned to a natural environmental regime was unaffected by photoperiod or temperature fluctuation, suggesting the presence of an internal circadian rhythm.Key words: starry flounder, Platichthys stellatus; otoliths, daily rings, growth increments, circadian, tetracycline

Age and growth of the narrow-barred Spanish Mackerel (Scomberomorus commerson Lacepede, 1880) in North-eastern Queensland waters

1992 ◽  
Vol 43 (5) ◽  
pp. 1269 ◽  
Author(s):  
GR McPherson
Keyword(s):  
Growth Parameters ◽  
Age And Growth ◽  
Differential Growth ◽  
Daily Growth ◽  
Spanish Mackerel ◽  
Growth Increments ◽  
Scomberomorus Commerson ◽  
North Eastern ◽  
Marginal Increment ◽  
Age Estimates

Whole otoliths were used to age Scomberomorus commerson in tropical Australian waters. Age estimates were validated by marginal-increment analysis of the first three otolith annuli. Confirmation of age estimates was provided by otolith daily growth increments and tag returns of known age. Differential growth in length, weight and longevity was evident between the sexes. The oldest male was 10 years old (127 cm FL, 19.0 kg). The oldest female was 14 years old (155 cm FL, 35 kg). The von Bertalanffy growth parameters L∞ and K were 127.5 cm and 0.25 for males and 155.0 cm and 0.17 for females.

Otoliths of Chinook Salmon (Oncorhynchus tshawytscha): Daily Growth Increments and Factors Influencing Their Production

1982 ◽  
Vol 39 (10) ◽  
pp. 1340-1347 ◽  
Author(s):  
John D. Neilson ◽  
Glen H. Geen
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Fish Length ◽  
Feeding Frequency ◽  
Otolith Growth ◽  
Increment Width ◽  
Daily Growth ◽  
Factors Affecting ◽  
Growth Increments ◽  
Otolith Increment

The effects of photoperiod, feeding frequency, and water temperature on formation of otolith daily growth increments in juvenile chinook salmon (Oncorhynchus tshawytscha) were examined. Feeding frequency influenced both increment number and width, whereas photoperiod and temperature affected only increment width. Fish fed once/24 h produced one increment every 24 h on average, while fish fed 4 times/24 h produced more than one increment every 24 h. Wider increments were produced in fish exposed to warmer water (11 °C) or 24 h of darkness. The ratio of otolith size to fish size remained constant throughout and between the photoperiod, temperature, and feeding frequency experiments, regardless of the number or width of increments produced. Although otolith growth is isometric with respect to increase in fish length under these experimental regimes, otolith microstructure will differ in fish of the same size reared under different environmental conditions. An understanding of factors affecting otolith increment production is required before increment number and width can be used to assess growth rates.Key words: otolith, daily, growth increments, chinook salmon

Growth in eight species of tropical anchovy determined from primary otolith increments

2002 ◽  
Vol 53 (5) ◽  
pp. 859 ◽  
Author(s):  
Frank E. Hoedt
Keyword(s):  
Experimental Validation ◽  
Growth Increment ◽  
Growth Constant ◽  
Growth Increments ◽  
Short Lifespan ◽  
Primary Growth ◽  
Otolith Increments ◽  
Sagittal Otolith ◽  
Growth Equations ◽  
The Relationship

Growth in eight species of tropical anchovy from Townsville, North Queensland was analysed from counts of primary growth increments in the sagittal otolith. Experimental validation of growth increment periodicity in four species indicated that primary growth increments are deposited daily. Reparameterized von Bertalanffy growth equations were used to describe the relationship between length and age over the range of lengths aged in all species. Growth rate during the immature phase ranged from 0.4 to 0.7 mm d–1 with an average of 0.58 mm d–1. Longevity was estimated for four stolephorid anchovies and ranged from three to ten months. The short lifespan and high values of the growth constant, K, calculated for the smaller species of anchovy were consistent with other recent otolith-based studies on small tropical clupeoids. This paper reports the first study of large number of co-occurring closely related tropical anchovy species and evidence that growth increments are formed with a daily periodicity.

Fitting growth models to otolith increments to reveal time-varying growth

2021 ◽  
Author(s):  
Timothy E. Essington ◽  
Mary Elizabeth Matta ◽  
Bryan A. Black ◽  
Thomas E Helser ◽  
Paul D. Spencer
Keyword(s):  
Time Series ◽  
Environmental Change ◽  
Statistical Model ◽  
Growth Model ◽  
Growth Dynamics ◽  
Fish Growth ◽  
Fish Length ◽  
Growth Increments ◽  
Otolith Increments ◽  
Size At Age

Identifying changes in fish growth is important for accurate scientific advice used for fisheries management, because environmental change is affecting fish growth and size-at-age is a critical component of contemporary stock assessment methods. Growth-increment biochronologies are time series of growth-increments derived from hard parts of marine organisms that may reveal dynamics of somatic fish growth. Here we use time series of otolith increments of two fish stocks to fit and compare a biologically-derived growth model and a generalized statistical model. Both models produced similar trajectories of annual growth trends, but the biologically-based one was more precise and predicted smaller inter-annual fluctuations than the statistical model. The biologically-based model strongly indicated covariance between anabolic and catabolic rate among individuals. Otolith size-at-age did not closely match fish length-at-age, and consequently the growth model could not accurately hindcast observed fish length-at-age. For these reasons, fitted growth dynamics from otolith biochronologies may best suited to identify growth rate fluctuations, to understand past drivers of growth dynamics, and improve ecological forecast in the face of rapid environmental change.

Age and growth of the Pacific grenadier (Coryphaenoides acrolepis) with age estimate validation using an improved radiometric ageing technique

1999 ◽  
Vol 56 (8) ◽  
pp. 1339-1350 ◽  
Author(s):  
Allen H Andrews ◽  
Gregor M Cailliet ◽  
Kenneth H Coale
Keyword(s):  
Information Age ◽  
Growth Increment ◽  
Age And Growth ◽  
Fishing Pressure ◽  
Large Fish ◽  
Growth Increments ◽  
The Pacific ◽  
Annual Periodicity ◽  
Radiometric Ages ◽  
Age Estimates

Current and historic longevity estimates for the Pacific grenadier (Coryphaenoides acrolepis) range from 6 to greater than 60 years. Age estimates in this study using growth increment counts in thin otolith sections indicate the Pacific grenadier is a long-lived fish. To validate this growth information, age was determined using the radioactive disequilibria of 210Pb and 226Ra in otolith cores from adult Pacific grenadier. Radiometric ages closely agreed with age estimates from counting growth increments, which confirms their annual periodicity. Radiometric results indicate the Pacific grenadier can live at least 55.8 years (-7.4, +10.1 years). Growth increment counts from large fish indicate longevity may approach 73 years. Because the Pacific grenadier is long-lived and matures late in life, it may be vulnerable to heavy fishing pressure. Therefore, conservation measures need to be taken to sustain this rapidly developing fishery.

scholarly journals Rapid growth of wahoo (Acanthocybium solandri) in the Coral Sea, based on length-at-age estimates using annual and daily increments on sagittal otoliths

2013 ◽  
Vol 70 (6) ◽  
pp. 1128-1139 ◽  
Author(s):  
Mitchell T. Zischke ◽  
Shane P. Griffiths ◽  
Ian R. Tibbetts
Keyword(s):  
Rapid Growth ◽  
Growth Parameter ◽  
Age And Growth ◽  
Parameter Estimates ◽  
Annual Increment ◽  
Important Species ◽  
Daily Increments ◽  
Growth Increments ◽  
Coral Sea ◽  
Age Estimates

Abstract Zischke, M. T., Griffiths, S. P., and Tibbetts, I. R. 2013. Rapid growth of wahoo (Acanthocybium solandri) in the Coral Sea, based on length-at-age estimates using annual and daily increments on sagittal otoliths. – ICES Journal of Marine Science, 70: 1128–1139. The wahoo (Acanthocybium solandri) is an economically important species incidentally caught in oceanic fisheries targeting tuna and coastal fisheries targeting mackerels. The age and growth of wahoo was examined using whole and sectioned otoliths from 395 fish (790–1770 mm LF) sampled from the Coral Sea. Growth increments were more reliably assigned on whole otoliths than sectioned otoliths. Edge analyses revealed that growth increments were deposited annually, primarily between October and February. Furthermore, analysis of presumed daily microincrements showed that ∼90% of fish had deposited the first “annual” growth increment by the 365th day, thereby indirectly validating annual increment formation. Wahoo were aged at between 108 d and 7 years, with 76% of fish being <2-year old. The specialized von Bertalanffy growth function provided the best fit to length-at-age data, with parameter estimates (sexes combined) of L∞ = 1499 mm LF, K = 1.58 year−1, and t0 = −0.17 years. The growth performance index for wahoo in the Coral Sea (φ′ = 4.55) was one of the highest of all pelagic fish, with their growth and maximum size most similar to dolphinfish. This study suggests that wahoo are one of the fastest growing teleosts and provides growth parameter estimates that may facilitate future stock assessments and guide fisheries management.

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