scholarly journals Individual growth pattern and variability in Serranus scriba: a Bayesian analysis

2009 ◽  
Vol 67 (3) ◽  
pp. 502-512 ◽  
Author(s):  
Josep Alós ◽  
Miquel Palmer ◽  
Salvador Balle ◽  
Antoni Maria Grau ◽  
Beatriz Morales-Nin
Keyword(s):  
Growth Rate ◽  
Bayesian Analysis ◽  
Growth Pattern ◽  
Growth Curves ◽  
Individual Variability ◽  
Growth Patterns ◽  
Individual Growth ◽  
Individual Level ◽  
Population Dynamics Models ◽  
Dynamics Models

Abstract Alós, J., Palmer, M., Balle, S., Grau, A. M., and Morales-Nin, B. 2010. Individual growth pattern and variability in Serranus scriba: a Bayesian analysis. – ICES Journal of Marine Science, 67: 502–512. Variability in growth patterns at an individual level in Serranus scriba is described using a Bayesian approach for a generalized von Bertalanffy growth model that accommodates one change in growth rate at a specific point during the lifespan. The approach enables individual growth curves to be inferred, even in a species with a relatively short lifespan and no commercial value, i.e. limited sample sizes available, but potentially endangered by recreational fishing. The change in growth rate may be the result of differing allocation of energy between reproductive and somatic activities at different ages. Overall, the approach presented provides adequate input for future implementation of population dynamics models that take into account individual variability, e.g. individual-based models, even for species for which limited data are available.

PATTERNS OF GROWTH IN HEIGHT AND WEIGHT FROM BIRTH TO EIGHTEEN YEARS OF AGE

PEDIATRICS ◽  
1959 ◽  
Vol 24 (5) ◽  
pp. 904-921
Author(s):  
Robert B. Reed ◽  
Harold C. Stuart
Keyword(s):  
Growth Curves ◽  
Growth Patterns ◽  
Individual Growth ◽  
Growth Spurt ◽  
Adolescent Growth Spurt ◽  
Wide Range ◽  
Basic Facts ◽  
The Individual ◽  
Rates Of Growth ◽  
Mature Size

In this report is displayed the range of variation observed in the growth curves of height and weight in a series of 134 children observed from birth to 18 years. For purposes of simplification the individuals have been classified on the basis of their rates of growth during three successive 6-year intervals. Even in terms of this crude classification several basic facts about individual growth patterns of height and weight are apparent. The wide range of differences between individuals applies not only to facts about size at specific ages but also to the pattern of change followed from age period to age period. The rate of growth during early childhood, i.e. before 6 years of age, is associated with, but not specifically predictive of, size at maturity and timing of the adolescent growth spurt. Individuals with rapid growth before 6 years of age tend to have large mature size and early adolescent growth spurt. It will be the objective of future reports from this research project to determine the manner in which the individual differences in growth demonstrated and classified here are related to aspects of physical development, to environmental influences such as dietary intake and to the level of health of the child.

A Parsimonious Number of Growth Curves

1993 ◽  
Vol 10 (3) ◽  
pp. 132-136 ◽  
Author(s):  
Boris Zeide
Keyword(s):  
Growth Pattern ◽  
Ecological Factors ◽  
Growth Curves ◽  
Site Index ◽  
Growth Conditions ◽  
Growth Patterns ◽  
Construction Methods ◽  
Complex Interactions ◽  
Site Index Curve ◽  
Index Curve

Abstract Construction of new site index curves is often justified by a lack of growth information for a given species and site. This justification presumes that there is a one-to-one correspondence between growth pattern and stand conditions which are determined by numerous genetic and ecological factors together with their complex interactions. Because these factors are combined in an infinite number of ways, each stand is unique and needs its own site index curve. The effort required for collecting growth information would be prohibitive. This effort is also unnecessary because many existing curves coincide with each other and are, therefore, redundant. Differences in species, site, and construction methods do not prevent the appearance of the same growth patterns. These facts indicate that unique growth conditions do not mean that each stand has a unique growth pattern. Therefore, a more productive approach to growth modeling consists of distilling these patterns from existing curves and yield tables rather than piling up more new site index curves. Earlier investigations showed that the diversity in growth curves can be reduced to a small number (15-30) of growth types. The present study demonstrates that the number of types can be further reduced to 3-5 without sacrificing accuracy of growth predictions. North. J. Appl. For. 10(3):132-136.

scholarly journals Growth Rate Variation and Larval Survival: Inferences from an Individual-Based Size-Dependent Predation Model

1993 ◽  
Vol 50 (1) ◽  
pp. 133-142 ◽  
Author(s):  
James A. Rice ◽  
Thomas J. Miller ◽  
Kenneth A. Rose ◽  
Larry B. Crowder ◽  
Elizabeth A. Marschall ◽  
...  
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Individual Variability ◽  
Individual Growth ◽  
Rate Variation ◽  
High Survival ◽  
Initial Growth ◽  
Size Dependent ◽  
The Mean ◽  
Selection For

We used an individual-based Monte Carlo simulation model to explore how changes in the mean and variance of growth rates of individuals in a larval fish cohort interact with size-dependent predation to affect the number and characteristics of individual survivors. Small changes in initial cohort mean growth rate can change survival over the first 60 d of life 10-to 30-fold. But when variance in growth rate among individuals is high, survival can be substantially higher than expected from the initial mean cohort growth rate. Selection for faster-growing individuals becomes stronger with increasing variance and increasing predation rate. In some cases, > 80% of the survivors may come from the upper 25% of the initial growth rate distribution, and the mean growth rate of the survivors may exceed twice the initial mean growth rate. When individual growth rates change from day to day rather than remaining constant, the contribution of atypical individuals is accentuated even further. Counterintuitively, most of the selection for faster-growing individuals happens only after the majority of mortality has already taken place. These results suggest that interactions between individual variability and selective mortality may have important cohort-level implications for survival in fishes.

Comparison of selected Douglas-fir seed sources for cambial and leader growth patterns in four western Oregon environments

1977 ◽  
Vol 7 (1) ◽  
pp. 154-164 ◽  
Author(s):  
William H. Emmingham
Keyword(s):  
Growth Rate ◽  
British Columbia ◽  
Growth Pattern ◽  
Douglas Fir ◽  
Growth Patterns ◽  
Seasonal Growth ◽  
Growth Duration ◽  
Cambial Growth ◽  
Seed Sources ◽  
Definite Pattern

The leader and cambial growth of sapling Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) from both inland and coastal varieties followed a definite pattern in four western Oregon environments. Generally, buds became active first and cambial growth became active soon after. Leader growth stopped in August, long before cambial growth, which continued into October. Phenology, total seasonal growth, and growth pattern for trees from coastal sources from Vancouver Island, B.C., to southern Oregon were more similar than for trees from inland sources from British Columbia to Idaho and Arizona. Most of the differences among populations in one season's growth were related to growth rate rather than growth duration.

scholarly journals Historical analysis of somatic growth of Chilean hake (Merluccius gayi gayi) off central coast of Chile

2017 ◽  
Vol 41 (3) ◽  
pp. 558-569
Author(s):  
Francisco Cerna ◽  
Luis A. Cubillos ◽  
Guido Plaza
Keyword(s):  
Growth Rate ◽  
Growth Parameters ◽  
Historical Analysis ◽  
Somatic Growth ◽  
Growth Curves ◽  
Individual Growth ◽  
Linear Mixed Effect Model ◽  
Central Coast ◽  
Mixed Effect ◽  
Average Growth

Somatic growth was studied in the Chilean hake stock off central coast of Chile, through the application of Von Bertalanffy equation (vB) as a non-linear mixed effect model (NLME) on length-at-agedata derived from otolith readings made at Instituto de Fomento Pesquero since 1972. Average growth rates for each year from 1972 to 2009 were estimated. Growth parameters of vB curves were analyzed for three major periods regarding changes in stock biomass (1972-1990, 1991-2003 and 2004-2009). Results indicated that the average growth rate showed inter-annual variations that did not exceed ±15 cm of total length around the historical average of males and females, showing no persistent tendency towards sustained increase or decrease in somatic growth rate. Growth curves obtained with the vB parameters, estimated for the three periods, showed a similar trajectories until age 7 and 8 years, in both male and females. Changes after this age may be a result of a decrease of larger fish removed by the selective effect of fishing, which triggered variations in the fitted curves, but not necessarily changes in somatic growth of these ages in the population. The results demonstrated that the individual growth of hake has not changed significantly since 1972, without observing a density-dependent effect with decreasing abundance.

Reproduction, growth and maturity in the black flying-fox, Pteropus alecto (Megachiroptera : Pteropodidae)

1998 ◽  
Vol 46 (4) ◽  
pp. 329 ◽  
Author(s):  
M. J. Vardon ◽  
C. R. Tidemann
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Growth Curves ◽  
Day Length ◽  
Individual Growth ◽  
Young Males ◽  
Weight Growth ◽  
Eastern Australia ◽  
Juvenile Males ◽  
Flying Fox

This paper reviews the timing of reproduction, growth rates and age at maturity of the black flying-fox, Pteropus alecto. This species is found from Sulawesi, Indonesia, south to the central east coast of Australia. In northern Australia at 12ºS most young are born in January–March, in contrast to October–November at 27ºS in eastern Australia, but a small percentage of young are born outside the major birth peaks in both areas. The birth peaks of P. alecto appear to be aligned with periods of maximum plant productivity, rather than day length. The plasticity of breeding season is likely to be an important factor enabling P. alecto to colonise areas from near the equator to 29ºS. Individual growth rates were calculated for 27 P. alecto. The weight growth rate of these animals was 2.40 3.14 g day-1 (mean s.d.), while growth rate of the forearm was 0.19 0.18 mm day-1 (mean s.d.). The growth rate of the forearm of females was significantly greater than for males (P = 0.08). From the mean forearm lengths of animals trapped, separate growth curves were developed for juvenile males (n = 566) and females (n = 610); these indicate that growth rate of females is about 8% higher than that of males. Primiparous females had a forearm length of 171.1 3.4 mm (mean s.d.) (n = 5), which is achieved 15–17 months after birth, but about a third of females with forearm lengths of 160–170 mm have suckled young. Males mature at an age greater than females due to their slower growth rate, a phenomenon known from other megachiropteran species.

INDIVIDUAL VARIATION OF GROWTH AND FILTRATION RATES OF MUSSELS MYTILUS GALLOPROVINCIALIS LAM

2017 ◽  
Author(s):  
Irina Kazankova ◽  
Irina Kazankova ◽  
Elena Vasechkina ◽  
Elena Vasechkina
Keyword(s):  
Growth Rate ◽  
Individual Variation ◽  
Coefficient Of Variation ◽  
Individual Variability ◽  
Individual Growth ◽  
Rate Variation ◽  
Sample Mean ◽  
Metabolic Costs ◽  
Individual Growth Rate ◽  
The Mean

Research on individual variation of the filtration and growth rates of mussels was based both on the authors’ field and laboratory experiments and literature data analysis. High individual variability of these characteristics was recorded during the tests. The coefficient of variation grew up as the mean rate diminished. Under low specific growth rate the coefficient of variation (ratio of root-mean-square deviation to the sample mean) could exceed 100 %. Tests revealed the power-law relation of the coefficient of variation from the average for studied characteristics. That relation could be seen in filtration and growth rate charts; it was also true for estimates of production energy and metabolic costs. The exponent varied from -0.36 to -0.77. Individual growth rate variation of mussels was concluded to be an important criterion of the favorability of environmental conditions.

EVALUATION OF BABY CARROT CULTIVARS AND THEIR GROWTH PATTERNS IN SOUTHWESTERN ONTARIO

1980 ◽  
Vol 60 (3) ◽  
pp. 911-915
Author(s):  
A. LIPTAY ◽  
J. K. MUEHMER
Keyword(s):  
Growth Rate ◽  
Growth Pattern ◽  
Radial Growth ◽  
Growth Patterns ◽  
Longitudinal Growth ◽  
Soil Conditions ◽  
Radial Growth Rate ◽  
Agronomic Characters ◽  
The Third

In the assessment of baby carrot cultivars for various agronomic characters, three patterns of growth were observed in various carrot cultivars. Carrots of the first growth pattern had a rapid longitudinal rate of extension relative to their radial growth rate. These roots outgrew the baby carrot length earlier than other cultivars. In the second type of growth, radial extension was rapid relative to longitudinal growth and consequently these carrots became too thick before achieving sufficient length. Carrots from cultivars with the third pattern of growth had a desirable longitudinal rate of extension relative to radial growth. It was furthermore observed that under very wet soil conditions longitudinal growth was inhibited more than radial growth.

scholarly journals Growth pattern in tropical mangrove trees of Bunaken National Park, North Sulawesi, Indonesia

2019 ◽  
Vol 20 (6) ◽  
Author(s):  
RIGNOLDA DJAMALUDDIN
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Growth Pattern ◽  
National Park ◽  
Stem Growth ◽  
Growth Patterns ◽  
Diameter Growth ◽  
North Sulawesi ◽  
Individual Trees ◽  
Mangrove Trees

Abstract. Djamaluddin R. 2019. Growth pattern in tropical mangrove trees of Bunaken National Park, North Sulawesi, Indonesia. Biodiversitas 20: 1713-1720. Seasonal diameter growth patterns in mangrove are often related to rainfall, temperature and moisture regime. At any localities, specific environmental factors may influence growth rate of individual trees. I asked whether stem growth of tropical mangrove in BNP is constant over a year, and whether stem growth rates are different by sites, species, and trees of the same species. Dendrometer bands were installed on trees from twelve different sites in BNP to measure stem growth rates. Measurements were made at two months intervals from July 1999 to June 2001 and March 2014 to December 2016. Growth rates measured in trees at the twelve sites varied significantly from 0.83 ± 0.27 to 1.71 ± 0.31 mm month-1. Growth rates were higher on Sonneratia alba (1.65 ± 0.69 mm month-1), low on Rhizophora stylosa, Xylocarpus moluccensis, Avicennia marina, Ceriops tagal (0.82 ± 0.16, 0.82 ± 0.18, 0.85 ± 0.18, 0.88 ± 0.28 mm month-1, respectively), and medium on Rhizophora apiculata, Bruguiera parviflora, Bruguiera gymnorrhiza, Rhizophora mucronata (1.19 ± 0.16, 1.22 ± 0.69, 1.25 ± 0.49, 1.31 ± 0.22 mm month-1, respectively). Statistically, growth rates were higher in trees with initial girths more than 50 cm compared to trees with initial girth less than 50 cm on B. gymnorrhiza, C. tagal, and R. mucronata, but these were slower for R. apiculata and S. alba. Between individual trees in six species tested, the differences in diameter growth rate were statistically significant. Growth rates varied among different site conditions, and the effect of soil water salinity on these was significant at higher intertidal sites. Growth rates exhibited seasonal patterns, and these were correlated positively with rainfall and negatively with temperature. The effect of the 2015-2016 El Nino was significant on reduced growth rates.  

INDIVIDUAL VARIATION OF GROWTH AND FILTRATION RATES OF MUSSELS MYTILUS GALLOPROVINCIALIS LAM

2017 ◽  
Author(s):  
Irina Kazankova ◽  
Irina Kazankova ◽  
Elena Vasechkina ◽  
Elena Vasechkina
Keyword(s):  
Growth Rate ◽  
Individual Variation ◽  
Coefficient Of Variation ◽  
Individual Variability ◽  
Individual Growth ◽  
Rate Variation ◽  
Sample Mean ◽  
Metabolic Costs ◽  
Individual Growth Rate ◽  
The Mean

Research on individual variation of the filtration and growth rates of mussels was based both on the authors’ field and laboratory experiments and literature data analysis. High individual variability of these characteristics was recorded during the tests. The coefficient of variation grew up as the mean rate diminished. Under low specific growth rate the coefficient of variation (ratio of root-mean-square deviation to the sample mean) could exceed 100 %. Tests revealed the power-law relation of the coefficient of variation from the average for studied characteristics. That relation could be seen in filtration and growth rate charts; it was also true for estimates of production energy and metabolic costs. The exponent varied from -0.36 to -0.77. Individual growth rate variation of mussels was concluded to be an important criterion of the favorability of environmental conditions.

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