scholarly journals The Interannual Variability of the Fall Size of Young-of-The-Year Chub (Squalius cephalus): Influence of Phenology, Growth Patterns and Abiotic Factors

2021 ◽  
Vol 9 ◽  
Author(s):  
Maxime Logez ◽  
Bernadette Bounket ◽  
Pierre Gibert ◽  
Georges Carrel ◽  
Virginie Diouloufet ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Abiotic Factors ◽  
Hydrological Regime ◽  
Growth Patterns ◽  
Individual Growth ◽  
Life Stages ◽  
Large Variability ◽  
Growing Period ◽  
Young Of The Year ◽  
Squalius Cephalus

Long-term surveys confirm the rapidity of environmental and biological changes undergone by endangered species but that also concerned relatively “tolerant” species, especially common rheophilic species such as European chub (Squalius cephalus, Linnaeus 1758). As many organisms, fish are highly vulnerable during their first life stages. Body size is a determinant factor for ecosystem functioning and for fish to survive to predators or to winter conditions. While numerous studies has already demonstrated the large variability of autumnal size of fish hatched during the year, few have focused on the factors explaining these interannual variations and on the growth patterns underlying these distributions. Using otoliths of young-of-the-year (YOY), we studied how the interannual variability in fall sizes of chub might be related to varying phenology, temperature, hydrology and growth patterns. YOY were sampled in three sections of the same reach of the Rhône River with contrasted hydrological regime: an artificial deep lotic channel (the tailrace of Bollène), a bypassed section with both lotic and lentic areas (former river channel before dam construction) and a reservoir with lentic deep waters. Sampling was performed on each sector during two thermally distinct years. Temperature had an important effect on both phenology and growth rate but it was not expressed similarly among river sections. Fish hatched earlier in the warmer year. Fish sizes were positively correlated with growing degree-days, but with distinct relationships between years and sections. The growth was faster in the warmer year, and in the warmer section, but differences in growth patterns varied between sections. In the bypassed section, the difference was slight, almost not significant, even if temperatures were very different between the 2 years considered. Autumnal variations in size could be explained either by an earlier phenology or by a faster growth due to higher temperatures occurring during the final part of the growing period. Our results were in accordance with general theory’s predictions relating individual growth to temperature, but they also showed that other factors might mitigate the influence of temperature on fish early life stages.

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.

Description of a simulation model for the population dynamics of Eimeria acervulina infection in broilers

Parasitology ◽  
1994 ◽  
Vol 108 (5) ◽  
pp. 503-512 ◽  
Author(s):  
A. M. Henken ◽  
H. W. Ploeger ◽  
E. A. M. Graat ◽  
T. E. Carpenter
Keyword(s):  
Population Dynamics ◽  
Simulation Model ◽  
Difference Equations ◽  
Life Stages ◽  
Eimeria Acervulina ◽  
Growing Period ◽  
Equilibrium Level ◽  
Equilibrium Number

SummaryA simulation model for the population dynamics of Eimeria acervulina infection in broilers is presented. The model describes the development of the numbers of parasites in the various life-stages during the growing period of broilers and the empty house period between grow-outs. The model includes assumptions with respect to development of immunity to E. acervulina infection and effects of application of anticoccidial drugs. The model consists of a set of difference equations that are solved numerically at 1 h intervals. Under constant conditions, an equilibrium level was reached after a few grow-outs during which infection always peaked around the 21st day in the growing period. Within a growing period, infection peaked earlier (later) than the 21st day in case initial numbers of sporulated oocysts were higher (lower) than the equilibrium number.

scholarly journals Clustering Individual Growth Patterns in an Even-Aged Forest Stand

FORMATH ◽  
2005 ◽  
Vol 4 (0) ◽  
pp. 49-69
Author(s):  
H. Yanagihara ◽  
A. Yoshimoto
Keyword(s):  
Forest Stand ◽  
Growth Patterns ◽  
Individual Growth

scholarly journals Transcripts repressed at the stop of phloem unloading highlight the energy efficiency of sugar import in the ripening V. vinifera fruit.

2021 ◽  
Author(s):  
Stefania Savoi ◽  
Laurent Torregrosa ◽  
Charles Romieu
Keyword(s):  
Cell Wall ◽  
Regulatory Elements ◽  
Solute Concentration ◽  
Growth Patterns ◽  
Individual Growth ◽  
Sugar Accumulation ◽  
Minor Role ◽  
Phloem Unloading ◽  
Sugar Transporters ◽  
A Minor

AbstractTranscriptomic changes at the cessation of sugar accumulation in the pericarp of Vitis vinifera were addressed on single berries re-synchronized according to their individual growth patterns. The net rates of water, sugars and K+ accumulation inferred from individual growth and solute concentration confirmed that these inflows stopped simultaneously in the ripe berry, while the small amount of malic acid remaining at this stage was still being oxidized at a low rate. Resynchronized individual berries displayed negligible variations in gene expression among triplicates. RNA-Seq studies revealed sharp reprogramming of cell wall enzymes and structural proteins, associated with an 80% repression of specific sugar transporters and aquaporins on the plasma or tonoplast membranes, at the stop of phloem unloading in the three genotypes and two environments investigated. The prevalence of SWEET transporters suggests that electrogenic transporters would just play a minor role on the plasma membrane of SE/CC complex, and the one of the flesh, while sucrose/H+ exchangers dominate on its tonoplast. Cis-regulatory elements present in their promoters allowed to sort these transporters in different groups, also including specific TIPs and PIPs paralogs, and cohorts of cell wall related genes. These results lead us to propose which structural, developmental and energy adaptations would give this fruit such a power of attraction for water and photoassimilates.

Biotic and abiotic factors influencing channel catfish egg and gut microbiome dynamics during early life stages

Aquaculture ◽  
2019 ◽  
Vol 498 ◽  
pp. 556-567 ◽  
Author(s):  
S. Abdul Razak ◽  
M.J. Griffin ◽  
C.C. Mischke ◽  
B.G. Bosworth ◽  
G.C. Waldbieser ◽  
...  
Keyword(s):  
Channel Catfish ◽  
Gut Microbiome ◽  
Early Life ◽  
Abiotic Factors ◽  
Life Stages ◽  
Early Life Stages ◽  
Biotic And Abiotic Factors ◽  
Factors Influencing

Hydrotechnical facilities within the Chernobyl nuclear power plant exclusion zone: impacts on hydrologic regime and plant growth patterns of floodplain water bodies of the Pripyat River

2003 ◽  
Vol 48 (7) ◽  
pp. 89-96 ◽  
Author(s):  
D.I. Gudkov ◽  
L.N. Zub ◽  
A.L. Savitsky
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Hydrological Regime ◽  
Chernobyl Nuclear Power Plant ◽  
Growth Patterns ◽  
Left Bank ◽  
Vegetative Cover ◽  
Exclusion Zone ◽  
Radionuclide Contamination

As result of the Chernobyl nuclear power plant accident the territory of the left-bank flood-lands of the Pripyat River have undergone intensive radionuclide contamination. With the purpose of preventing the washing away of radioactive substances, a complex of flood protection dams was constructed. This construction changed the hydrological regime of these territories and caused overgrowth by higher aquatic plants. Absence of a flowing mode of reservoirs, the stagnant phenomena during spring and seasonal high waters on the embank site have caused amplification of eutrophication processes, swamping and, connected with it, increase of water-marsh floristic complex in the structure of the vegetative cover.

Comparison of 2 growth patterns during the growing period in fattening bulls. 3. slaughter characteristics, carcass composition and meat quality

1993 ◽  
Vol 1993 ◽  
pp. 217-217
Author(s):  
A. Clinquart ◽  
C. Van Eenaeme ◽  
T. Van Vooren ◽  
J. Van Hoof ◽  
L. Istasse
Keyword(s):  
Meat Quality ◽  
Food Restriction ◽  
Early Stage ◽  
Average Daily Gain ◽  
Live Weight ◽  
Growth Patterns ◽  
Carcass Composition ◽  
Growing Period ◽  
Daily Gain

The degree to which growth patterns are modified after a period of food restriction affects the compositional changes of the carcasses(Carstens et al., 1992), furthermore, the growth rate has a direct effect on the physical properties of meat (Fishell et al., 1985). The objective of this experiment was to evaluate the effects of a severe food restriction at a early stage of maturity on the slaughter characteristics and meat quality of Belgian Blue bulls.Twelve Belgian Blue bulls (dual purpose type) weighing 233 kg were offered two different planes of nutrition during the growing period. Six bulls (Group-) received a restricted diet so that their average daily gain was 0.34 kg/d (Group+) during 202 days. By contrast six other bulls were given a more conventional growing diet and their average daily gain was 1.13 kg/d. Both Groups were fattened with similar diet and slaughtered when the live weight was close to 600 kg. Carcass weight was measured and killing-out proportion calculated, the composition of the carcass was estimated after dissection of ribs 7, 8, 9 removed 48 h post-mortem.

Daily growth patterns of six species of young-of-the-year of Chilean intertidal fishes

2012 ◽  
Vol 93 (2) ◽  
pp. 389-395 ◽  
Author(s):  
Guido Plaza ◽  
Mauricio F. Landaeta ◽  
C. Valeria Espinoza ◽  
F. Patricio Ojeda
Keyword(s):  
Growth Patterns ◽  
Increment Width ◽  
Daily Growth ◽  
Central Chile ◽  
Irregular Pattern ◽  
Otolith Microstructure Analysis ◽  
Young Of The Year ◽  
Intertidal Pools ◽  
Oval Shape ◽  
Intertidal Fishes

Otolith microstructure analysis was used to reveal daily growth patterns of young-of-the year (YOY) of six species of perciform fishes, Bovichtus chilensis (Bovichtidae), Girella laevifrons and Graus nigra (Kyphosidae), Helcogrammoides chilensis (Tripterygiidae) and Hypsoblennius sordidus and Scartichthys viridis (Blenniidae). YOY collected in intertidal pools from June to December 2008 in Central Chile, ranged from 24 to 76 mm total length and from 25 to 390 days of age. In the six species, sagittal otoliths showed a slightly oval shape, symmetrical and laterally compressed and showed micro-increments distinguishable after a two-side polishing. Increment width of sagittae showed two patterns irrespective of hatch month and species: (i) a parabolic growth with wider increment widths (during the first 150 of YOY life, e.g. B. chilensis, G. nigra and G. laevifrons); and (ii) a more irregular pattern with lower increment widths during most of the seasons in H. chilensis and H. sordidus. Further results were: (i) a unique central primordium enclosed by two checks after which distinctive increments were deposited; (ii) low instantaneous growth rates estimated through the slope of the length-at-age relationship (range 0.1–0.21 mm d−1); and (iii) a linear fish size–otolith size relationship.

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