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.

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.

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.

Annual cycle of shell growth increment formation in two continental shelf bivalves and its paleoecologic significance

Paleobiology ◽  
1980 ◽  
Vol 6 (3) ◽  
pp. 331-340 ◽  
Author(s):  
Douglas S. Jones
Keyword(s):  
Growth Rate ◽  
Continental Shelf ◽  
Annual Cycle ◽  
Shell Growth ◽  
Growth Increment ◽  
Age And Growth ◽  
Growth Line ◽  
Arctica Islandica ◽  
Growth Increments ◽  
Increment Formation

The bivalvesSpisula solidissima, the Atlantic surf clam, andArctica islandica, the ocean quahog, from the continental shelf off New Jersey, contain repeating structures in their shells. By analyzing the growing shell margins in living specimens at bi-weekly (or sometimes monthly) intervals throughout two consecutive years, it was possible to define an annual cycle of shell growth increment formation in both species. The shell increments in each species are microstructurally distinct units that form over a period of several months at select seasons of the year. Each species has two alternating shell growth increments, GI I and GI II. GI I (the annual growth line of previous studies) is formed annually in the late summer-fall inS. solidissimaand in the fall-early winter inA. islandica.These periods correspond to the spawning phase of the reproductive cycle in both species. No winter rings were found. The annual increments were used to determine age and growth rate in both Recent and Pleistocene specimens. They may also be useful in determining season of death. Because shell growth increments are formed in synchrony among living populations in these species, mass mortalities may be distinguished in the fossil record. Accurate age and growth rate determinations in fossils are important in many paleobiologic contexts, such as deciding between increased longevity or growth rate in cases of phyletic size increase.

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.

scholarly journals Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific

2009 ◽  
Vol 67 (1) ◽  
pp. 125-134 ◽  
Author(s):  
Shane P. Griffiths ◽  
Gary C. Fry ◽  
Fiona J. Manson ◽  
Dong C. Lou
Keyword(s):  
Growth Models ◽  
Fork Length ◽  
Information Criterion ◽  
Growth Increment ◽  
Annual Growth ◽  
Age And Growth ◽  
Parameter Estimates ◽  
Growth Increments ◽  
Significant Difference ◽  
Longtail Tuna

Abstract Griffiths, S. P., Fry, G. C., Manson, F. J., and Lou, D. C. 2010. Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific. – ICES Journal of Marine Science, 67: 125–134. Age and growth of longtail tuna (Thunnus tonggol) were assessed by examination of annual growth increments in sectioned sagittal otoliths from 461 fish (238–1250 mm fork length, LF) sampled from tropical and temperate waters in the central Indo-Pacific between February 2003 and April 2005. Edge and microincrement analyses (presumed daily increments) suggest that longtail tuna deposit a single annual growth increment mainly between August and October. Age was, therefore, estimated for all fish by counting assumed annual growth increments. Ages ranged from 154 d to 18.7 years, with most fish being 3–9 years. Five growth models were fitted to length-at-age data, all of which indicated that the species is relatively slow-growing and long-lived. Recaptures of two tagged fish at liberty for 6.2 and 10.5 years support this notion. A bias-corrected form of Akaike's Information Criterion determined that the Schnute–Richards model provided the best fit to length-at-age data, with model parameter estimates (sexes combined) of L∞ = 135.4 cm LF, K = 22.3 year−1, t0 = 0.120 years, δ = 150.0, v = 0.019, and γ = 2.7 × 10−8. There was no significant difference in growth between sexes. The results suggest that longtail tuna grow more slowly and live longer than other tuna species of similar size. Coupled with their restricted neritic distribution, longtail tuna may be vulnerable to overexploitation by fisheries, and caution needs to be exercised in managing the species until more reliable biological and catch data are collected to assess the status of the population.

scholarly journals Age and growth of bluemouth, Helicolenus dactylopterus, from the Portuguese continental slope

2009 ◽  
Vol 66 (3) ◽  
pp. 524-531 ◽  
Author(s):  
Vera Sequeira ◽  
Ana Neves ◽  
Ana Rita Vieira ◽  
Ivone Figueiredo ◽  
Leonel S. Gordo
Keyword(s):  
Continental Slope ◽  
Growth Increment ◽  
Age And Growth ◽  
Growth Equation ◽  
Daily Growth ◽  
Class 1 ◽  
Helicolenus Dactylopterus ◽  
The Mean ◽  
Von Bertalanffy Growth Equation ◽  
Age Estimates

Abstract Sequeira, V., Neves, A., Vieira, A. R., Figueiredo, I., and Gordo, L. S. 2009. Age and growth of bluemouth, Helicolenus dactylopterus, from the Portuguese continental slope. – ICES Journal of Marine Science, 66: 524–531. In all, 933 bluemouth (Helicolenus dactylopterus) were obtained from bottom-trawl research surveys along the Portuguese continental slope between October 2005 and February 2007 and from commercial landings. Age was determined by reading whole sagittal otoliths, and age estimates were validated by daily growth increment (DGI) analysis. Fish ranged from 5.2 to 44.9 cm, which corresponded to fish between 0 and 30 years old. The mean total length obtained from DGI analysis for age class 1 fish was 8.6 cm, corresponding to otoliths with a mean radius of 1.8 mm. As no statistical differences between sex were observed, the von Bertalanffy growth equation fitted was Lt = 45.50[1 − e−0.05(t+4.01)]. Comparisons with other studies using Hotelling's T2 test and the growth perform index (Ф) are drawn. The growth rates estimated in this study using whole otolith readings were the lowest of all the studies available, and the estimated L∞ is lower then those obtained for Azorean waters and higher than those published for the Mediterranean.

Age and growth of the squid Loligo forbesi (Cephalopoda: Loliginidae) in Irish waters

1995 ◽  
Vol 75 (3) ◽  
pp. 605-620 ◽  
Author(s):  
M. A. Collins ◽  
G. M. Burnell ◽  
P. G. Rodhouse
Keyword(s):  
Indirect Evidence ◽  
Reproductive Organs ◽  
Growth Increment ◽  
Age And Growth ◽  
Length Frequency ◽  
Positive Allometry ◽  
Growth Increments ◽  
Minimum Age ◽  
Loligo Forbesi ◽  
One Year

Samples of the squid Loligo forbesi Steenstrup 1856 were obtained from commercial catches and research cruises in the Irish and Celtic Seas from August 1991 until October 1993. Age and growth of L. forbesi were estimated from putative daily statolith growth increment counts and from length-frequency data. Indirect evidence of the daily deposition of growth increments was obtained by counting increments on statoliths from immature female squid from successive monthly modes, during a four-month period when length-frequency growth estimates were high. Female growth estimates from length-frequency analysis (15–30 mm per month) were slightly lower than statolith-based estimates (30 mm per month). Statolith data indicated that both sexes had a life-span of approximately one year and that males grew faster and attained a larger size than females. In both sexes growth was found to be logarithmic over the size range sampled (28–505 mm mantle length). Mean estimated age of mature males and females was 317 and 312 days respectively, with the minimum age at maturity found to be 236 and 241 days. Back-calculations of hatching dates showed an extended spawning season from November to May. Squid hatched in the spring grew faster than those hatched in the autumn and winter. In post-recruit L. forbesi, growth of head, mantle and viscera were approximately isometric with body mass. The digestive gland showed slight positive allometry, whilst reproductive organs showed strong positive allometry.

Long-term growth-increment chronologies reveal diverse influences of climate forcing on freshwater and forest biota in the Pacific Northwest

2014 ◽  
Vol 21 (2) ◽  
pp. 594-604 ◽  
Author(s):  
Bryan A. Black ◽  
Jason B. Dunham ◽  
Brett W. Blundon ◽  
Jayne Brim-Box ◽  
Alan J. Tepley
Keyword(s):  
Pacific Northwest ◽  
Growth Increment ◽  
Climate Forcing ◽  
The Pacific
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