Age and growth of the forkbeard Phycis phycis (Gadidae) from the Azorean archipelago, North Atlantic

2009 ◽  
Vol 89 (3) ◽  
pp. 629-633 ◽  
Author(s):  
Ana Rita Costa Abecasis ◽  
Angela Canha ◽  
Dália Reis ◽  
Mário Rui Pinho ◽  
João Gil-Pereira
Keyword(s):  
North Atlantic ◽  
Preparation Method ◽  
Growth Parameters ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Target Species ◽  
North Eastern ◽  
Main Target ◽  
Slow Growing ◽  
Phycis Phycis

The forkbeard Phycis phycis is one of the main target species of the demersal fishery in the Azores, north-eastern Atlantic. Age and growth of the forkbeard were studied using 477 otoliths from individuals caught between April 2000 and August 2004. Otoliths were burned and sectioned, a preparation method that improved the easiness of readings. Individuals ranged from 21 to 71 cm in total length, and their estimated ages between 2 and 18 years old. Forkbeard is a relatively slow growing, long lived species, that does not show sexual dimorphism in growth. The von Bertalanffy growth parameters estimated for the Azorean forkbeard were L∞ = 79.64 cm, k = 0.09 yr−1 and t0 = −1.88 years.

Age and growth of forkbeard, Phycis phycis, in Portuguese continental waters

2013 ◽  
Vol 94 (3) ◽  
pp. 623-630 ◽  
Author(s):  
Ana Rita Vieira ◽  
Ana Neves ◽  
Vera Sequeira ◽  
Rafaela Barros Paiva ◽  
Leonel Serrano Gordo
Keyword(s):  
Growth Parameters ◽  
Growth Zone ◽  
Growth Increment ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Commercial Species ◽  
Marginal Increment ◽  
Slow Growing ◽  
Annual Growth Increment ◽  
Phycis Phycis

The forkbeard, Phycis phycis, is an important commercial species in Portugal; however, little information is available on its biology. Age and growth of the forkbeard from Portuguese continental waters were studied using 687 otoliths from specimens caught between May 2011 and December 2012. Otoliths were transversally sectioned, and assigned ages were validated by marginal increment analysis and edge analysis, and indices of precision were also calculated to corroborate ageing within and between readers. Validation techniques showed that an annual growth increment is formed every year, corresponding to the succession of an opaque and a translucent growth zone. Specimens ranged from 15.5 to 67.1 cm total length (TL), and their estimated ages ranged between 0 and 18 years. The forkbeard is a relatively slow growing, long lived species, that does not show sexual dimorphism in growth. The von Bertalanffy growth parameters estimated for forkbeard from the Portuguese continental waters were L∞ = 75.14 cm TL, k = 0.10 yr−1 and t0 = −2.09 yr.

Age and growth of Alitta succinea (Polychaeta; Nereididae) in a tropical estuary of Brazil

2013 ◽  
Vol 93 (8) ◽  
pp. 2123-2128 ◽  
Author(s):  
C.S.C. Sette ◽  
R.A. Shinozaki-Mendes ◽  
T.L. Barros ◽  
J.R.B. Souza
Keyword(s):  
Growth Parameters ◽  
Length Distribution ◽  
Information Criteria ◽  
Age And Growth ◽  
Distribution Data ◽  
Tropical Estuary ◽  
Von Bertalanffy ◽  
Eastern Brazil ◽  
North Eastern ◽  
Shallow Subtidal

The aim of this work was to study the dynamics of Alitta succinea population growth in a tropical estuary. The organisms were collected in the polyhaline area of Pina Basin, north-eastern Brazil, in lower and shallow subtidal consolidated substrates, from October 2009 to March 2011. Fifteen samples with a size of 0.01 m2 were collected every month. A total of 2064 A. succinea individuals were measured for growth analysis, and the measure used was the length from prostomium to the 25th setiger. Growth parameters were estimated by the frequency–length distribution data from three different functions (i.e. von Bertalanffy, Gompertz and Richards). The differences in the densities of A. succinea were significant between the months of the dry and the rainy season, with the rain pattern being the factor that most affects the A. succinea life cycle. According to Akaike information criteria, the von Bertalanffy and Gompertz models were the ones that presented the best fit with the growth curve of A. succinea for the studied period. Using the Bhattacharya method for the analysis of modal progression, we identified eight cohorts. The lowest recruitment values were found in July and August 2010, respectively, and the remaining months had numbers of recruits that were representative of the total population. The growth performance index (Ø′) found was 2.86. The maximum longevity indicates that specimens of A. succinea live between 586 and 953 d, and the instantaneous mortality rate (Z) is 1.53 yr−1.

Demography of the Agassiz's parrotfish Sparisoma frondosum (Agassiz, 1831) in north-eastern Brazil

2015 ◽  
Vol 96 (5) ◽  
pp. 1157-1166 ◽  
Author(s):  
Rosângela Lessa ◽  
Camila R. Da Silva ◽  
June F. Dias ◽  
Francisco M. Santana
Keyword(s):  
Growth Parameters ◽  
Growth Curves ◽  
Information Criterion ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Eastern Brazil ◽  
North Eastern ◽  
Marginal Increment ◽  
First Maturity ◽  
Size At First Maturity

Age and growth of Agassiz's parrotfish Sparisoma frondosum captured off Brazil (Pernambuco) were estimated using sagittal otoliths from 251 specimens. Sex of each specimen was determined and showed that 130 specimens were females (13.1 to 36.8 cm TL) and 121 were males (17.5 to 36.6 cm TL). The otolith marginal increment analysis indicated a single translucent ring formed every year. Parameters of growth curves were derived for the von Bertalanffy (VBGF) and Gompertz models. Based on the Akaike information criterion (AIC), both models were suitable for describing the growth of this species. VBGF parameters were estimated for males L∞ = 39.74 cm TL, K = 0.22, t0 = −1.63 years, females L∞ = 32.38 cm TL, K = 0.44; t0 = −0.23 years; and for the sexes combined L∞ = 33.66 cm TL, K = 0.41, t0 = −0.27 years. The study showed that 55% of individuals were 3 and 4 years of age, with maximal age of 9 years. Mature females (>17.6 cm TL) accounted for 45% of the sample. The age at first maturity for females was 1.6 years. For males the size at first maturity was not determined as immature individuals were not present in the overall sample. Also, primary males (PM) and specimens with gonads undergoing sexual transition were not found. The age structure and growth parameters for S. frondosum are an important contribution to the assessment of the state of exploitation of this species.

scholarly journals Age and growth of the king mackerel (Scomberomorus Cavalla) off the northeastern coast of Brazil

2009 ◽  
Vol 57 (4) ◽  
pp. 273-285 ◽  
Author(s):  
Marcelo Francisco de Nóbrega ◽  
Rosangela Paula Lessa
Keyword(s):  
Growth Parameters ◽  
Least Square Method ◽  
Least Square ◽  
Age And Growth ◽  
Northeastern Brazil ◽  
Von Bertalanffy ◽  
Growth Band ◽  
Marginal Increment ◽  
King Mackerel ◽  
Catch Composition

Age and growth of the king mackerel (Scomberomorus cavalla) were estimated for northeastern Brazil. A total of 405 sagittal otoliths from 140 males (24.4-112 cm), 73 females (28-114.8 cm) and 193 specimens of unknown sex (11.5-121 cm) were examined. Marginal increment analysis indicated an annual pattern for growth band deposition. The age classes ranged from 1 to 15 years. Length ranged from 11.5 to 121 cm. The Schnute model indicated that the von Bertalanffy growth model demonstrated the best adjustment, with p=1/b, and was therefore used for estimating growth. Back-calculated curves had smaller variances, giving the following estimated growth parameters for males: L∞= 116.8 cm, K = 0.190, t0 = 0.377; and females: L∞= 132.7 cm, K = 0.159 and t0 = 0.387. In order to compare the curves for males and females, the overlapping of 95% confidence intervals was performed for the parameters generated from the von Bertalanffy non-linear least square method. Specimens between 3 and 8 years of age represented 82.2% (n=5,783) of the catch composition, characterizing the species as a catchable stock in the region.

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.

Age and growth of the snowy grouper, Epinephelus niveatus, off the Brazilian coast

2011 ◽  
Vol 92 (3) ◽  
pp. 633-641 ◽  
Author(s):  
Paulo A.S. Costa ◽  
Adriana C. Braga ◽  
Juan P. Rubinich ◽  
Antônio Olinto Ávila-da-Silva ◽  
Cassiano M. Neto
Keyword(s):  
Life Span ◽  
Positive Relationship ◽  
Growth Parameters ◽  
Age And Growth ◽  
Brazilian Coast ◽  
Von Bertalanffy ◽  
South Eastern ◽  
Otolith Analysis ◽  
Eastern Brazil ◽  
Marginal Increment

The age and growth of the snowy grouper, Epinephelus niveatus, from central and south-eastern Brazil were studied by otolith analysis from a sample of 341 specimens, ranging from 325 to 1216 mm in total length (TL) caught with bottom longlines between 1996 and 1998. Otolith length grew proportionally with the increasing TL of the fish. Marginal increment analysis indicated that a single opaque band forms each year during autumn–winter. The maximum estimated age was 54 years, which significantly extends the previously estimated life-span of 21–29 years for this species. The von Bertalanffy growth parameters for both sexes were estimated as L∞ = 1098.4 mm TL, K = 0.062 year −1 and t0 = –2.68. The study revealed differences in mean length-at-age and size at recruitment, as well as in growth parameters between the central and the south-eastern Brazilian coast, which can be attributed mainly to different fishing pressures. The snowy grouper was found at depths of 82–492 m, and showed a positive relationship between age and depth, suggesting differential movements of older fish to deeper waters.

scholarly journals Biological parameters of Luciobarbus callensis populates Beni-Haroun dam, north-eastern Algeria

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
Houda Berrouk ◽  
Fatiha Sahtout ◽  
Chahinez Boualleg
Keyword(s):  
Growth Parameters ◽  
Economic Value ◽  
Age And Growth ◽  
Growth Data ◽  
Naked Eye ◽  
North Eastern ◽  
Major Process ◽  
Eastern Algeria ◽  
A Minor ◽  
Autochthonous Species

The fish age and growth data mainly assist many ichthyologists to understand the life history features of species and population. The growth is a major process of fish biology, and considered as one of the key processes of length-structured models of fishes. Thus,   the present study was devoted to studying the growth of an autochthonous species (Luciobarbus callensis), populating the dam of Beni-Haroun (Mila city, northeast Algeria), and is known by its socio-economic value and aquaculture interest. The study was conducted on a sampling of 257 fish individuals during the year 2015 – 2016. The age of Luciobarbus callensis was determined by using the described method or the scalimetry method, providing an easier sampling and reading procedures, and also a high precision.  Fish sexes were identified via the observation of gonads, by naked eye based on gonad shape and color, where the number of females was higher (165) than males (92). The obtained results revealed a maximum longevity as seven years of Luciobarbus callensis, and the determined growth parameters of the separated and combined fish sexes were found to be as follow: L∞= 47,37  cm ; K= 0,29  ; t0= -0,51  ; Ø’= 2,813 (females); L∞= 42,11  cm ; K =0,26  ; t0= -0,58 ; Ø’= 2,663 (males); and  L∞= 47 37  cm ; K= 0,20 ; t0= -0,75 ;  Ø’ =2,652 (combined sex). Moreover, the evolution of the total weight of fishes with respect to their size presents a minor allometry (b<3), (with or without sex distinction).

scholarly journals First study on age and growth of the deep-water Goblin Shark, Mitsukurina owstoni (Jordan, 1898)

2020 ◽  
Author(s):  
Fabio P. Caltabellotta ◽  
Zachary A. Siders ◽  
Gregor Cailliet ◽  
Fabio S. Motta ◽  
Otto B. F. Gadig
Keyword(s):  
Deep Water ◽  
Growth Parameters ◽  
Large Male ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Total Length ◽  
History Information ◽  
Minimum Age ◽  
Useful Life ◽  
Using Data

AbstractDue to poorly mineralizing structures, ageing deep-water elasmobranchs requires nonconventional techniques. The aim of the present study was to develop a reliable ageing technique using the vertebral centrum to provide information about the age and growth parameters in the Goblin Shark, Mitsukurina owstoni (Jordan, 1898). One vertebral centrum from an individual measuring 315.2 cm in total length was analysed. A minimum age of 27 years was estimated. By incorporating priors based on the growth of deep-water sharks and an additional likelihood on L∞ using data on large male Goblin Sharks, a Bayesian von Bertalanffy growth model was estimated with a male L∞ of 364 cm total length, weigh 215 kg at L∞, grow slowly with a k equal to 0.049, mature at 16.5 years, and live up to 55 years. Our results are essential to provide useful life history information, with the aim of elucidating the cryptic ecology and biology of this deep-water shark.

Reproductive biology, age and growth of the two-banded seabream Diplodus vulgaris (Pisces: Sparidae) in the Gulf of Gabès, Tunisia

2013 ◽  
Vol 93 (5) ◽  
pp. 1415-1421 ◽  
Author(s):  
Aymen Hadj Taieb ◽  
Mohamed Ghorbel ◽  
Nader Ben Hadj Hamida ◽  
Othman Jarboui
Keyword(s):  
Growth Parameters ◽  
Age And Growth ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Spawning Activity ◽  
Gulf Of Gabes ◽  
Instantaneous Rate ◽  
Total Length ◽  
Gulf Of Gabès ◽  
Overall Ratio

Samples of common two-banded seabream Diplodus vulgaris (N = 1097), used in this study, were caught in the Gulf of Gabès (Tunisia) from March 2008 to February 2010. Total length ranged from 7 to 25 cm. Diplodus vulgaris is a protandric hermaphrodite. The overall ratio of females to males was 1:1.66. The reproductive season extended from October to February, and the peak spawning activity occurred in December–January. The total length at which 50% of the population reached maturity was 14.14 ± 0.16 cm for females and 13.57 ± 0.01 cm for males. Parameters of the length–weight relationship (TW = aTLb) for all individuals were a = 0.0185 and b = 2.9319. The youngest specimen in this study was 0+ years, whereas the oldest one was 9 years. The von Bertalanffy growth parameters for the whole sample were: L∞ = 25.4 cm, k = 0.179 and t0 = −1.631 year. The instantaneous rate of natural mortality was: M = 0.333 year−1.

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).

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