Effect of environmental variability on the individual growth of yellow abalone (Haliotis corrugata) and blue abalone (Haliotis fulgens) in the Mexican Pacific

2021 ◽  
pp. 101877
Author(s):  
Victor G. Vargas-López ◽  
Francisco Vergara-Solana ◽  
Francisco Arreguín-Sánchez
Keyword(s):  
Environmental Variability ◽  
Individual Growth ◽  
Mexican Pacific ◽  
The Individual ◽  
Haliotis Corrugata

scholarly journals Century-long cod otolith biochronology reveals individual growth plasticity in response to temperature

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Szymon Smoliński ◽  
Julie Deplanque-Lasserre ◽  
Einar Hjörleifsson ◽  
Audrey J. Geffen ◽  
Jane A. Godiksen ◽  
...  
Keyword(s):  
Gadus Morhua ◽  
Environmental Variability ◽  
Atlantic Cod ◽  
Population Level ◽  
Climatic Conditions ◽  
Individual Growth ◽  
Individual Level ◽  
Thermal Plasticity ◽  
Individual Effects ◽  
The Individual

Abstract Otolith biochronologies combine growth records from individual fish to produce long-term growth sequences, which can help to disentangle individual from population-level responses to environmental variability. This study assessed individual thermal plasticity of Atlantic cod (Gadus morhua) growth in Icelandic waters based on measurements of otolith increments. We applied linear mixed-effects models and developed a century-long growth biochronology (1908–2014). We demonstrated interannual and cohort-specific changes in the growth of Icelandic cod over the last century which were mainly driven by temperature variation. Temperature had contrasting relationships with growth—positive for the fish during the youngest ages and negative during the oldest ages. We decomposed the effects of temperature on growth observed at the population level into within-individual effects and among‐individual effects and detected significant individual variation in the thermal plasticity of growth. Variance in the individual plasticity differed across cohorts and may be related to the mean environmental conditions experienced by the group. Our results underscore the complexity of the relationships between climatic conditions and the growth of fish at both the population and individual level, and highlight the need to distinguish between average population responses and growth plasticity of the individuals for accurate growth predictions.

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.

scholarly journals Individual growth of Heleobia piscium in natural populations (Gastropoda: Cochliopidae) from the multiple use natural Reserve Isla Martin Garcia, Buenos Aires, Argentina

2008 ◽  
Vol 68 (3) ◽  
pp. 617-621 ◽  
Author(s):  
SM. Martin
Keyword(s):  
Buenos Aires ◽  
Natural Populations ◽  
Dynamic Structure ◽  
Reproductive Period ◽  
Individual Growth ◽  
Growth Equation ◽  
Multiple Use ◽  
Natural Reserve ◽  
Drainage Channels ◽  
The Individual

The present work analyses the individual growth of Heleobia piscium in natural conditions in coastal drainage channels of the Multiple Use Natural Reserve Isla Martín García, Buenos Aires, Argentina. Isla Martín García is located in the Upper Río de la Plata, to the south of the mouth of the Uruguay river (34° 11' 25" S and 58° 15' 38" W). Monthly collections were made from July 2005 to July 2006 in the eastern part of the island (Arena Beach). The population of H. piscium showed a complex and dynamic structure of sizes during a long period of the annual cycle. Two cohorts could be detected. The Bertalanffy growth equation was: Lt = 6 (1-e -1.85 (t+0.38)) and Lt = 3.9 (1-e -0.19 (t+4.84)) for cohorts 1 and 2, respectively. The pattern of population growth displayed a staggered model, where the greatest growth is observed during the summer. The reproductive period occurred during six months, from the beginning of summer to middle of fall. Based on only one reproductive effort, this pattern is not similar to that of other cogeneric species already studied.

Individual Growth and Reproduction

2019 ◽  
pp. 38-56
Author(s):  
Ken H. Andersen
Keyword(s):  
Life History ◽  
Growth Model ◽  
Life Histories ◽  
Maximum Size ◽  
Individual Growth ◽  
Energy Budgets ◽  
Asymptotic Size ◽  
The Individual ◽  
Growth And Reproduction

This chapter develops descriptions of how individuals grow and reproduce. More specifically, the chapter seeks to determine the growth and reproduction rates from the consumption rate, by developing an energy budget of the individual as a function of size. To that end, the chapter addresses the question of how an individual makes use of the energy acquired from consumption. It sets up the energy budgets of individuals by formulating the growth model using so-called life-history invariants, which are parameters that do not vary systematically between species. While the formulation of the growth model in terms of life-history invariants is largely successful, there is in particular one parameter that is not invariant between life histories: the asymptotic size (maximum size) of individuals in the population. This parameter plays the role of a master trait that characterizes most of the variation between life histories.

Visualization of Individual Growth-Related Craniofacial Changes Based on Cephalometric Landmark Data: A Pilot Study

2002 ◽  
Vol 39 (3) ◽  
pp. 341-352 ◽  
Author(s):  
Christopher J. Lux ◽  
Jens Starke ◽  
Jan Rübel ◽  
Angelika Stellzig ◽  
Gerda Komposch
Keyword(s):  
Dynamic Behavior ◽  
Growth Process ◽  
Shape Change ◽  
Individual Growth ◽  
Craniofacial Skeleton ◽  
Size And Shape ◽  
Lateral Cephalograms ◽  
Landmark Data ◽  
The Individual ◽  
Shape Changes

Objective: An approach based on Euclidean distances between cephalometric landmarks is presented (1) to visualize and localize the individual shape changes of the complex craniofacial skeleton during growth and (2) to depict the individual dynamic behavior of developmental size and shape changes. Patients and Method: Growth-related craniofacial changes were investigated exemplarily for two male orthodontically untreated subjects from the Belfast Growth Study on the basis of lateral cephalograms at 7, 9, 11, 13, and 15 years. The interlandmark distances among seven skeletal cephalometric landmarks served as a database for the study. A modified Karhunen-Loèvedecomposition based on orthogonal modes and time-dependent scalar amplitudes was used to describe the growth process. The individual shape changes of the various craniofacial regions were visualized by allocation of colors to the respective distances, and overdrawn representations were reconstructed by means of multidimensional scaling. Results and Conclusions: This visualization technique allows anatomical regions to be characterized with respect to reduced or strengthened growth, compared with pure size changes. The clinically relevant mechanisms of craniofacial changes are visualized (e.g., shifts in the anteroposterior or vertical dimensions of the jaws in relation to cranial base and structural imbalances during development). In addition, overdrawing the effects of shape change on the skeletal structures gives a more readily comprehensible impression of the growth process. Taking account of the methodical limitations of this approach (e.g., the restrictions concerning the number of landmarks), the clinician may take advantage of this technique in orthodontic or surgical diagnostics to gain additional insight into the individual complex size and shape changes during development along with their dynamic behavior.

scholarly journals Contribution of community-based sociotherapy interventions for the psychological well-being of Rwandan youths born to genocide perpetrators and survivors: analysis of the stories telling of a sociotherapy approach

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Emmanuel Biracyaza ◽  
Samuel Habimana
Keyword(s):  
Personal Growth ◽  
Psychosocial Problems ◽  
Well Being ◽  
Self Esteem ◽  
Health Intervention ◽  
Individual Growth ◽  
Community Based ◽  
Positive Functioning ◽  
Psychological Well Being ◽  
The Individual

Abstract Background Psychological well-being (PWB) refers to inter- and intra-individual levels of positive functioning that include one’s relatedness with others and self-referent attitudes that include one’s sense of mastery and personal growth. PWB consists of hedonism and eudaimonia building on thoughts, feelings, and behaviors. Sociotherapy is a community-based health intervention that contributes to the promotion of PWB worldwide. Starting from an analysis of trauma transmitted from the perpetrators and survivors of the Rwandan genocide to their descendants, this article is aimed at exploring the contribution of therapeutic sessions to PWB among youth. Method A qualitative study design based on shared testimonies was carried out. Field reports from the sociotherapists, written texts, and testimonies of changes presented in the conviviality meetings were analyzed using transactional analysis. We included 24 reflexive texts upon completion of 8 months of the therapeutic program. Results Results indicated that before sociotherapy sessions, youth born to genocide survivors and perpetrators had psychosocial distress, including low self-esteem, hopelessness, anxiety, stigma, thoughts of revenge, shame, depression, and antisocial behaviors. Sociotherapy significantly contributed to the reduction of these psychosocial problems. Participating youth reported feeling safe, trusted, respected, and healthier than before the sociotherapy. This intervention created inner healing, social cohesion, alleviated their sufferings of trauma, restored their families and contributed to community resilience. Results revealed that youth developed PWB, helping them to what appeared to be psychosocial problems as being potentially healthy, enhancing self-acceptance, and respecting humanity. Youth also became the vector for the reconciliation and reconstruction of their humanity. Conclusion Sociotherapy is a community health intervention that has an effective outcome on the personal well-being of of youth. This therapy impacted the individual, social, and familial resilience of youth who developed their capacity to regain and maintain health. The intervention restored their PWB, characterized by increased positive functioning specifically in the areas of autonomy, ecological mastery, individual growth, purpose in life, good relationships with others, and improved self-esteem.

TRACE ELEMENTS IN CEPHALOPOD CALCIFIED TISSUE: CUTTLEBONE AS A POSSIBLE TRACER FOR LIFE HISTORICAL EVENTS OF CUTTLEFISH

1999 ◽  
Vol 09 (03n04) ◽  
pp. 335-343 ◽  
Author(s):  
Y. IKEDA ◽  
N. ARAI ◽  
W. SAKAMOTO ◽  
K. YOSHIDA
Keyword(s):  
Trace Elements ◽  
Element Concentration ◽  
Major Element ◽  
Adult Stage ◽  
Individual Growth ◽  
Middle Portion ◽  
Ishigaki Island ◽  
Calcified Tissue ◽  
Young Stage ◽  
The Individual

Trace elements in a cuttlebone, a buoyant calcified tissue developing simultaneously with the individual growth, of an adult giant cuttlefish originating from the water of Ishigaki Island were measured by PIXE to examine the ontogenetic change of the element concentration. Beside calcium (major element), iron, zinc, manganese, copper, bromine and relatively large amounts of strontium were detected in the cuttlebone. Strontium concentration varied with position along the cuttlebone: it was high near the spine (the portion that deposited at the paralarval stage), then showed some variations at the middle portion of the cuttlebone (the portion that deposited from young stage to sub-adult stage) and became the highest near the locus (the portion that deposited near the catch date, i.e., adult stage). This variation was compared to migration of this species between inshore and offshore waters.

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