Age and growth of bluespine unicornfish (Naso unicornis): a half-century life-span for a keystone browser, with a novel approach to bomb radiocarbon dating in the Hawaiian Islands

2016 ◽  
Vol 73 (10) ◽  
pp. 1575-1586 ◽  
Author(s):  
Allen H. Andrews ◽  
Edward E. DeMartini ◽  
Jeff A. Eble ◽  
Brett M. Taylor ◽  
Dong Chun Lou ◽  
...  
Keyword(s):  
Growth Curves ◽  
Growth Function ◽  
Age And Growth ◽  
Fish Length ◽  
Age Validation ◽  
Novel Approach ◽  
Naso Unicornis ◽  
The Pacific ◽  
Von Bertalanffy Growth Function ◽  
Bomb Radiocarbon

Bluespine unicornfish (Naso unicornis) from Hawaii were aged to >50 years using cross-sectioned sagittal otoliths. Fish length was a poor indicator of age because of rapid and variable early growth, exemplified by fish aged to be 4 years near maximum length. Growth was deterministic with adult ages decoupled from body length. Otolith mass and thickness were evaluated as proxies for age and both were encouraging; thickness explained more variance but mass was easier to measure. An age estimation protocol was validated through ontogeny using bomb radiocarbon (14C) dating. Use of the postbomb 14C decline period from a regional reference chronology enabled age validation of young fish — a novel approach for the Pacific Ocean. A probabilistic procedure for assigning bomb 14C dates (CALIBomb) was used for the first time to determine fish birth years. The age-reading protocol was generally validated, and it was possible to describe length-at-age despite difficulties in counting otolith annuli beyond 30–40 years. Growth curves differed between the sexes, and a four-parameter generalized von Bertalanffy growth function provided the best fit.

scholarly journals Age and growth estimates for the starry smoothhound (Mustelus asterias) in the Northeast Atlantic Ocean

2010 ◽  
Vol 67 (5) ◽  
pp. 931-939 ◽  
Author(s):  
Edward D. Farrell ◽  
Stefano Mariani ◽  
Maurice W. Clarke
Keyword(s):  
Atlantic Ocean ◽  
Growth Curves ◽  
Growth Function ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Northeast Atlantic ◽  
Von Bertalanffy Growth Function ◽  
Female Data ◽  
Northeast Atlantic Ocean ◽  
Future Work

Abstract Farrell, E. D., Mariani, S., and Clarke, M. W. 2010. Age and growth estimates for the starry smoothhound (Mustelus asterias) in the Northeast Atlantic Ocean. – ICES Journal of Marine Science, 67: 931–939. Age, growth, and longevity were estimated for the starry smoothhound (Mustelus asterias), based on the interpretation of sectioned vertebrae of 106 males (35–104 cm stretch total length, STL) and 114 females (44–112 cm STL). Growth curves were fitted to length-at-age data using von Bertalanffy and Gompertz models. The three-parameter von Bertalanffy growth function (VBGF) provided the best statistical fit to the male data (L∞ = 103.7 cm STL, L0 = 38.1 cm STL, k = 0.195 year−1). The Gompertz growth function provided the best statistical fit to the female data, although the estimated parameters were biologically unreasonable. Therefore, the three-parameter VBGF was also accepted for females (L∞ = 123.5 cm STL, L0 = 34.9 cm STL, k = 0.146 year−1). Longevity was estimated to be 13 and 18.3 years for males and females, respectively. The length–weight relationship is also presented for 304 male and 424 female M. asterias. The von Bertalanffy model was fitted to the weight-at-age data. These estimates can form the basis of future work on the assessment and management of this species.

Age and growth of the whale shark (Rhincodon typus) in the north-western Pacific

2014 ◽  
Vol 65 (12) ◽  
pp. 1145 ◽  
Author(s):  
Hua Hsun Hsu ◽  
Shoou Jeng Joung ◽  
Robert E. Hueter ◽  
Kwang Ming Liu
Keyword(s):  
Growth Parameters ◽  
Growth Function ◽  
Age And Growth ◽  
Whale Shark ◽  
Growth Band ◽  
Rhincodon Typus ◽  
The North ◽  
Von Bertalanffy Growth Function ◽  
Marginal Increment ◽  
Using Data

This study estimated age and growth of the largest extant fish, the whale shark (Rhincodon typus) by counting vertebral band pairs from 92 specimens comprising 43 males (2.68–9.88 m total length [TL]), 30 females (1.60–7.02 m TL), and 19 unsexed individuals (2.83–6.67 m TL) taken by Taiwanese commercial fisheries during 2001–06. Growth band pairs up to 25 and 42 were counted for a 6.38-m TL female and a 9.88-m TL male, respectively. Using marginal increment ratio and centrum edge analysis, band pairs were postulated to be formed twice a year. The two-parameter von Bertalanffy growth function provided the best fit without significant differences between sexes. Growth parameters were calculated for both sexes as L∞ = 16.80 m TL, k = 0.037 year–1; annual band pair formation would modify these parameters to L∞ = 15.34 m TL, k = 0.021 year–1. Using data reported in another study for 50% size at maturity for males (8.1 m TL), and the largest immature and smallest mature females (8.7 and 9.6 m TL, respectively) in the Indo-Pacific, these TLs converted to ages at maturity of 17 years for males and 19–22 years for females. The longevity was calculated to be 80.4 years.

Growth rates of four Hawaiian deep slope fishes: a comparison of methods for estimating age and growth from otolith microincrement widths

1997 ◽  
Vol 54 (1) ◽  
pp. 126-136 ◽  
Author(s):  
H A Williams ◽  
M K Lowe
Keyword(s):  
Growth Rates ◽  
Growth Curves ◽  
Age And Growth ◽  
Interval Length ◽  
Fish Length ◽  
Comparison Of Methods ◽  
Increment Width ◽  
Daily Increment ◽  
Minimum Number ◽  
Age Estimates

Two methods were used to estimate the age and growth of four Hawaiian deep slope fishes. Otolith daily increment width estimates from radial sections of sagittal otoliths were integrated over the otolith radius to approximate age by (i) dividing interval length (micrometres) by mean increment width (micrometres per day) and summing this quotient for consecutive 500- µm radial intervals (S. Ralston and H.A. Williams. 1989. Fish. Bull. 87: 1-16) and (ii) fitting increment width (y) versus otolith radius (x) to a Gompertz rate curve and calculating the inverse integral of this curve (M.K. Smith and E. Kostlan. 1991. Fish. Bull. 89: 461-472). The methods also differ in the way the age-length key is generated. Ralston and Williams' method uses integrated age versus a regression-based estimate of fish length at 500- µm otolith radial intervals; Smith and Kostlan's method uses estimated age versus actual fish length. Neither method of integration produced significantly different age estimates; however, the use of regression-based fish length estimates instead of sampled fish lengths resulted in significant differences between estimated growth curves. The minimum number of daily increment width estimates required as a function of otolith radius was calculated, on the basis of observed microincrement width variation.

Using length data in the Schnute Model to describe growth in a metapenaeid from waters off Australia

2010 ◽  
Vol 61 (12) ◽  
pp. 1435 ◽  
Author(s):  
Steven S. Montgomery ◽  
Chris T. Walsh ◽  
Malcolm Haddon ◽  
Caitlin L. Kesby ◽  
Daniel D. Johnson
Keyword(s):  
Growth Parameters ◽  
Maximum Size ◽  
Growth Function ◽  
Novel Approach ◽  
Von Bertalanffy Growth Function ◽  
Female Data ◽  
Fitting Length ◽  
Schnute Model ◽  
Length Data ◽  
Best Fit

This paper presents a novel approach for fitting length data to the Schnute growth model. Cohorts were fitted manually to a time series of length distributions from two stocks (Clarence and Hunter Rivers) of Metapenaeus macleayi and considered analogous to individuals from tag–recapture data, in order to estimate growth parameters. Data for Clarence males best fitted the three-parameter Schnute Model (L∞ = 21.3 mm CL, κ = 0.025 day–1 and γ = –1.35), whereas those for Hunter males were best fitted to a two-parameter version of the model (L∞ = 33.5 mm CL, κ = 0.009 day–1 and γ = 0 fixed). The equivalent to the von Bertalanffy growth function was the best fit to female data from both stocks (L∞ = 36.6 and 40.2 mm CL, κ = 0.004 and 0.005 day–1 and γ = 1 fixed for Clarence and Hunter respectively). Females grew larger than males and took longer to achieve their maximum size. No significant differences in female growth were found between stocks; however, males from the Hunter grew to a longer mean maximum length but at a slower rate than those from the Clarence. This study shows how the Schnute Model can be fitted to length based data and thus include the flexibility of comparing fits between asymptotic and non-asymptotic growth functions.

Age and growth estimates of the Kwangtung skate Dipturus kwangtungensis in the waters of northern Taiwan

2015 ◽  
Vol 96 (7) ◽  
pp. 1395-1402 ◽  
Author(s):  
Shoou-Jeng Joung ◽  
Chien-Chi Chen ◽  
Kwang-Ming Liu ◽  
Tzu-Chi Hsieh
Keyword(s):  
Growth Parameters ◽  
Information Criterion ◽  
Growth Function ◽  
Age And Growth ◽  
Gompertz Function ◽  
Growth Band ◽  
Von Bertalanffy Growth Function ◽  
North Eastern ◽  
Robertson Function ◽  
Northern Taiwan

The age and growth of Kwangtung skate, Dipturus kwangtungensis, in the waters off northern Taiwan were estimated from 422 specimens collected between July 2006 and July 2008 at the Tashi fishing market in north-eastern Taiwan. The sexes-combined relationship between total length (TL) and centrum diameter (D) was estimated as follows: TL = 14.11D0.888 (N = 411, r2 = 0.94, P < 0.001). Growth band pairs (comprised of translucent and opaque bands) in vertebrae were determined to form once annually, based on the centrum edge analysis. Up to 14 band pairs were found for both sexes. The von Bertalanffy growth function (VBGF), two-parameter VBGF, the Robertson function, and the Gompertz function were used to fit the observed length-at-age data. The Akaike information criterion corrected indicated that the Gompertz function best fit the observed length at age data. Sex-specific growth functions were not significantly different; the sexes-combined growth parameters were estimated as follows: asymptotic length (L∞) = 96.7 cm TL, growth coefficient (kG) = 0.144 year−1 and constant (t0) = 5.45 year (N = 364, P < 0.01).

Age validation, growth and mortality rates of the tropical snappers (Pisces: Lutjanidae) Lutjanus adetii (Castelnau, 1873) and L. quinquelineatus (Bloch, 1790) from the central Great Barrier Reef, Australia

1996 ◽  
Vol 47 (4) ◽  
pp. 575 ◽  
Author(s):  
SJ Newman ◽  
DM Williams ◽  
GR Russ
Keyword(s):  
Great Barrier Reef ◽  
Growth Curves ◽  
Mortality Rates ◽  
Age And Growth ◽  
Natural Mortality ◽  
Barrier Reef ◽  
Age Validation ◽  
Differential Growth ◽  
Instantaneous Rate ◽  
Annulus Formation

The age and growth of Lutjanus adetii and L. quinquelineatus from the central Great Barrier Reef were determined from studies of annuli in sectioned otoliths (sagittae). The period of annulus formation was validated by oxytetracycline labelling of externally tagged fishes. For L. adetii, validation was obtained from tagged fishes that were recaptured after a minimum of 12 months at liberty, the first time this has been achieved for a Lutjanus species. A single opaque and translucent zone was formed once a year, with the opaque band (annulus) being formed during the winter months. Otolith weight was strongly correlated with age for both species. There was significant differential growth between the sexes in length-at-age and weight-at-age for both species, with males growing larger than females. The oldest individuals found were a male L. adetii of 24 years of age and a female L. quinquelineatus of 31 years of age. The shape of the growth curves were steep for the first few years and then became asymptotic. The annual instantaneous rate of natural mortality (M) was 0.235 for L. adetii and 0.154 for L. quinquelineatus, representing an annual survivorship of 79% and 86%, respectively. The protracted longevity and low natural mortality rates imply that both L. adetii and L. quinquelineatus are vulnerable to overfishing despite their small size.

Validated estimation of growth and age in the New Zealand abalone Haliotis iris using stable oxygen isotopes

2007 ◽  
Vol 58 (4) ◽  
pp. 354 ◽  
Author(s):  
J. R. Naylor ◽  
B. M. Manighetti ◽  
H. L. Neil ◽  
S. W. Kim
Keyword(s):  
Carbon Isotopes ◽  
Stock Assessment ◽  
Growth Function ◽  
Growth Patterns ◽  
Age And Growth ◽  
Data Sets ◽  
Reproductive Patterns ◽  
Novel Approach ◽  
Isotopic Analyses ◽  
Rational Management

The growth and reproductive patterns of abalone are central to an understanding of the dynamics of their populations, and provide essential input into many of the stock assessment models currently used as the basis of assessing the sustainability of the fisheries. At present, most of this knowledge is obtained by tag-recapture methods, which are time consuming, often expensive and potentially confounding. The aim of the present study was to determine whether variations in the ratios of oxygen and carbon isotopes in the shells of Haliotis iris can be used to determine age, growth and reproductive patterns. Isotopic analyses of H. iris shells indicated that oxygen isotope profiles within the shells reflected ambient water temperature at the time of shell precipitation, and that these profiles could be used to determine age and growth patterns. To match the variation in isotopic ratios with ambient temperature cycles, we also adopted the novel approach of fitting a growth function to the data sets. The method should allow the collection of abalone growth information over the finer scales more appropriate for the rational management of abalone fisheries. Variations in the ratios of carbon isotopes showed no consistent patterns and, unlike some mollusc species, did not appear to be useful predictors of reproductive status at length.

scholarly journals Natural Growth and Mortality of the Golden Grey Mullet Liza Aurata (Risso, 1810) In the Lagoon of Klisova-Messolonghi (W. Greece)

2019 ◽  
pp. 23-31 ◽  
Author(s):  
George N. Hotos
Keyword(s):  
Growth Parameters ◽  
Age Determination ◽  
Growth Curves ◽  
Growth Function ◽  
First Year ◽  
Annual Growth Rate ◽  
Von Bertalanffy ◽  
Liza Aurata ◽  
Total Length ◽  
Von Bertalanffy Growth Function

Growth and mortality of L. aurata (Risso,1810) were estimated in the lagoon of Klisova-Messolonghi (W. Greece), based on age estimation from scale readings of a total of 1048 individuals, ranging between 10 and 59 cm in total length (TL). Age determination revealed nine age classes (0+ to 8+). Maximum age was found to be 8 years for females and 6 years for males respectively. The growth pattern of L. aurata exhibited allometry (b=3.26). The species seems to achieve 34% of its growth during the first year; thereafter the annual growth rate drops. Both sexes presented similar von Bertalanffy growth curves. The von Bertalanffy growth function for the estimated total length-at-age was found Lt = 70.78 [1 - e -0.129(t+1.345)] for the combined sexes. Otolith weight, length and width were tested and they were found to be very good predictors for age. Between the present L. aurata growth parameters and those of other Mediterranean, Caspian and Atlantic Sea for the same species, there were found significant differences in its growth parameters. The total (Z) and natural (M) mortality rate was found to be 0.54 years-1 and 0.33 years-1 respectively. The estimated exploitation rate was found to be E=0.395 which suggests that the existing fishing pressure on L. aurata is rather moderate in the investigated region.

Growth curves of the yellowlegs shrimp Penaeus californiensis Holmes, 1900 (Decapoda, Penaeidae), using length data

Crustaceana ◽  
2020 ◽  
Vol 93 (9-10) ◽  
pp. 1103-1121
Author(s):  
Luis A. Félix-Salazar ◽  
E. Alberto Aragón-Noriega ◽  
Guillermo Rodríguez-Domínguez ◽  
Wenceslao Valenzuela-Quiñónez ◽  
Ana M. Arroyo-Bustos ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Coastal Lagoons ◽  
Age Groups ◽  
Growth Curves ◽  
Growth Function ◽  
Average Growth ◽  
Von Bertalanffy Growth Function ◽  
Female Data ◽  
Schnute Model ◽  
Oceanic Species

Abstract The yellowlegs shrimp Penaeus californiensis is an oceanic species that approaches the coastal zone for its reproduction. However, in the southern Gulf of California, this species also enters coastal lagoons to grow and reproduce. To test the hypothesis that the growth of P. californiensis differs between these two environments, monthly samplings of shrimp were made in the interior of the Navachiste coastal lagoon and its adjacent marine area. To determine growth, age groups were identified using the size structures over time. Five cases of the Schnute model were adjusted to the data, and the best case was selected using a multi-model selection approach. A sigmoid-shaped curve best represented the female data (case 2), and the inverted exponential curve (case 5; equivalent to the Von Bertalanffy growth function) was best for males. Average growth differed between sexes () but not between environments ().

Age estimation and growth pattern of the grouper Cephalopholis taeniops (Epinephelidae) off the Cape Verde Archipelago, north-west Africa

2014 ◽  
Vol 95 (3) ◽  
pp. 599-609 ◽  
Author(s):  
O. Tariche ◽  
J.G. Pajuelo ◽  
J.M. Lorenzo ◽  
A. Luque ◽  
J.A. Gonzalez
Keyword(s):  
Marine Ecosystem ◽  
Seawater Temperature ◽  
Time Lag ◽  
Growth Function ◽  
Growth Increment ◽  
Cape Verde ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
North West ◽  
Von Bertalanffy Growth Function

The grouper Cephalopholis taeniops is a carnivorous fish of the Cape Verde coastal marine ecosystem. Nothing is known regarding the age and growth of this epinephelid. In this study, the age and growth of C. taeniops was investigated by annual growth increment counts from 2804 specimens (7–51 cm total length) collected between January 2005 and December 2011. Whole otoliths underestimated the age indicated in sections by approximately 70%; therefore, sectioned otoliths were used in this study. A year's growth was represented by one opaque and one translucent ring. There was no apparent time lag from the start of the increase in the seawater temperature and the beginning of the formation of the opaque ring. The formation of the translucent rings coincided with a decrease in surface seawater temperature. Cephalopholis taeniops is a slow-growing and long-lived species, with ages of up to 20 years recorded. The seasonalized von Bertalanffy growth function was the best fitted among the four models tested, with an Akaike weight higher than 0.99. Growth was described by the seasonalized von Bertalanffy growth function as follows: L∞ = 54.26 cm, k = 0.135 year−1, t0 = −0.853 year, C = 0.439 and ts = 0.667.

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