scholarly journals Reversible morphological changes in a juvenile marine fish after exposure to predatory alarm cues

2020 ◽  
Vol 7 (5) ◽  
pp. 191945
Author(s):  
Carlos Díaz-Gil ◽  
Josep Alós ◽  
Pablo Arechavala-Lopez ◽  
Miquel Palmer ◽  
Inmaculada Riera-Batle ◽  
...  
Keyword(s):  
Marine Fish ◽  
Body Shape ◽  
Sparus Aurata ◽  
Morphological Changes ◽  
The Body ◽  
Fish Predator ◽  
Individual Level ◽  
Recovery Potential ◽  
Controlled Conditions ◽  
The Individual

Chemical cues from predators induce a range of predator-induced morphological defences (PIMDs) observed across fish taxa. However, the mechanisms, consistency, direction and adaptive value of PIMDs are still poorly studied. Here, we have tested if predatory cues can induce changes in the body shape of the juvenile marine fish Sparus aurata reared under controlled conditions without the presence of predators by exposing individuals to the olfactory stimulus of a fish predator. We tested our hypothesis using a nested replicated before-after-control-impact experiment, including recovery (potential reversibility) after the cessation of the predator stimulus. Differences in the size-independent body shape were explored using landmark-based geometric morphometrics and revealed that, on average, individuals exposed to a predatory cue presented deeper bodies and longer caudal regions, according to our adaptive theoretical predictions. These average plastic responses were reversible after withdrawal of the stimulus and individuals returned to average body shapes. We, therefore, provide evidence supporting innate reversible PIMDs in marine naive fish reared under controlled conditions. The effects at the individual level, including fitness and the associated applied implications, deserve further research.

Public service motivation and willingness to collaborate

2014 ◽  
Vol 2 (1) ◽  
pp. 80-95 ◽  
Author(s):  
Heather Getha-Taylor ◽  
Alexa Haddock-Bigwarfe
Keyword(s):  
Homeland Security ◽  
Public Service ◽  
Public Service Motivation ◽  
The Body ◽  
Organizational Level ◽  
Cross Sectional ◽  
Content Type ◽  
Individual Level ◽  
Original Survey ◽  
The Individual

Purpose – The purpose of this paper is to examine public service motivation (PSM) and the connection with collaborative attitudes among a sample of homeland security actors representing the public, private, and nonprofit sectors. Design/methodology/approach – This study examines relationships between measures of PSM and collaboration using original survey data and hierarchical multiple regression. Findings – Findings reveal strong positive relationships between PSM measures and attitudes toward collaboration at the individual and organizational level. Research limitations/implications – Survey results are cross-sectional and are from respondents participating in a single state's homeland security summit. Practical implications – It is expected that results can be used to enhance collaboration at the individual and organizational levels. At the organizational level, results can be used for matching individuals with collaborative opportunities. At the individual level, results can be used for enhanced self-reflection and effectiveness purposes. Originality/value – This study provides insights on the relationship between PSM measures and collaborative attitudes. The research contributes to the body of scholarly work connecting PSM and correlates of interest.

scholarly journals Simple morphometrics for predicting lordosis-induced deviations of body-shape in reared Gilthead seabream (Sparus aurata L.)

2021 ◽  
Author(s):  
Stefanos Fragkoulis ◽  
George Koumoundouros
Keyword(s):  
Body Shape ◽  
Sparus Aurata ◽  
Juvenile Stage ◽  
External Morphology ◽  
Gilthead Seabream ◽  
High Recovery ◽  
Normal Phenotype ◽  
Recovery Potential ◽  
Morphometric Index ◽  
Normal Fish

Haemal lordosis, V-shape bending of the haemal vertebrae, is a frequent abnormality of reared fish. Lordosis severity ranges from light deformations of vertebral axis, with insignificant effects on external morphology, to severe axis deformations with significant impact on body-shape. In the present study, we developed a simple morphometric index (PrAn) that links lordosis severity at the juvenile stage with fish body-shape at harvesting, without requiring to radiograph or sacrifice the samples. Examined seabream specimens were part of our previous study (Fragkoulis et al. 2019, Sci. Rep. 9, 9832), which monitored the effects of lordosis on the external morphology of pit-tagged seabream juveniles during their growth, up to harvest size. At both juvenile and adult stages, PrAn was effective in discriminating the normal fish from ca the 70% of lordotic fish. Our results suggest the PrAn as a valuable scale of quality, which quantifies the lordosis effects on fish external morphology, both at the juvenile stage and at harvest. Depending on the lordosis rates, and the hatchery strategy on the maximum allowed abnormality rates, this scale can cull out different rates of lordotic fish, without affecting the fish with normal phenotype or the lordotic fish with high recovery potential.

Organizational Arrogance and a Theory-Based Instrument

2021 ◽  
pp. 210-232
Author(s):  
C. Victor Herbin III
Keyword(s):  
Organizational Culture ◽  
Work Teams ◽  
The Body ◽  
Organizational Level ◽  
Cronbach Alpha ◽  
Individual Level ◽  
Body Of Knowledge ◽  
The Individual ◽  
Development And Validation

Prior studies provided insight on arrogance at the individual level and how arrogant individuals express superiority through (1) overconfidence in capabilities, (2) dismissiveness, (3) and disparagement, and how these behaviors may negatively impact those employees in and around their work teams, yet did not indicate how these behaviors impact organizational culture. Organizational arrogance represents an emerging concept that describes arrogance at the organizational level. Organizational arrogance provides the body of knowledge with a comprehensive and inclusive definition that led to the development and validation of the Organizational Arrogance Scale with a Cronbach Alpha of .922 that accurately measures the presence of organizational arrogance.

scholarly journals Measuring the body composition of elderly subjects: a comparison of methods

1994 ◽  
Vol 72 (1) ◽  
pp. 33-44 ◽  
Author(s):  
J. J. Reilly ◽  
L. A. Murray ◽  
J. Wilson ◽  
J. V. G. A. Durnin
Keyword(s):  
Body Composition ◽  
Total Body Water ◽  
Body Water ◽  
The Body ◽  
Practical Significance ◽  
Elderly Subjects ◽  
Younger Adults ◽  
Individual Level ◽  
Total Body ◽  
The Individual

There is a paucity of data on differences between methods for the assessment of body composition in elderly subjects. Studies on younger adults suggest that such differences are of some practical significance at the individual level. In the present study the following methods of estimating percentage body fatness (BF%) were compared in healthy elderly men and women (mean age 70 (SD 6) years: densitometry; skinfold thickness; total body water; bioelectrical impedance (BIA) using an age-specific predictive equation and the manufacturers' equation; body mass index (BMI). Though BF% estimates from the various methods tended to be highly correlated with those from densitometry and with each other, differences between methods at the individual level were marked. In particular, the age-specific equations based on BMI and BIA systematically overestimated BF% relative to the other methods. Biases between BF% estimates derived from densitometry, skinfolds, BIA (manufacturers' equation) and total body water were less marked, indicating little evidence of systematic differences between these methods in elderly subjects. Individual differences between methods were slightly greater than those reported in some studies of younger adults, but this may be of little practical significance, and may be considered inevitable in view of variability between and within subjects in the extent to which the underlying assumptions of these two-component methods are met in elderly subjects.

scholarly journals Individual and social immune mechanisms of the honey bee (Apis mellifera)

2018 ◽  
Vol 74 (1) ◽  
pp. 6013-2018
Author(s):  
ANETA STRACHECKA ◽  
ALEKSANDRA ŁOŚ ◽  
JOANNA FILIPCZUK ◽  
MICHAŁ SCHULZ
Keyword(s):  
Apis Mellifera ◽  
Defense Mechanism ◽  
Resistance Mechanisms ◽  
The Body ◽  
Natural Resistance ◽  
Cell Mediated Immunity ◽  
Individual Level ◽  
Immune Mechanisms ◽  
Rebel Workers ◽  
The Individual

Honey bees (Apis mellifera) are constantly exposed to contact with many types of pathogens. However, during evolution they developed a number of immune mechanisms. At the individual level, they comprise 1) resistance mechanisms associated with anatomical and physiological barriers of the body, 2) cell-mediated immunity involving hemocytes (including plasmocytes, lamellocytes, and granulocytes), 3a) congenital humoral resistance related to the activity of lysozyme (N-acetylmuramylhydrolase), the prophenylooxidase system (ProPO) and hemagglutinins (lectins), and 3b) induced humoral resistence based on the action of antimicrobial peptides: apidicines, hymenoptecin, and defensins. In addition to the individual resistance of each bee, there is also a defense mechanism activated at the colony level. Shared secretion resistance is connected with the presence of antipathogenic compounds in secreta and in bee products. Social immunity is associated with hygienic and nursing behaviors, as well as with age polyethism in the colony, swarming (and the emergence of rebel workers), and the changing behavior of sick individuals. Many aspects and interactions between different types of resistance and immunity still remain unexplored. However, current research trends revolve around clarifying uncertainties so as to strengthen the natural resistance of bees and fight against pathogens that threaten the insects..

scholarly journals Intensive vehicle traffic impacts morphology and endocrine stress response in a threatened amphibian

Oryx ◽  
2015 ◽  
Vol 51 (1) ◽  
pp. 182-188 ◽  
Author(s):  
Hugo Cayuela ◽  
Ludivine Quay ◽  
Adeline Dumet ◽  
Jean-Paul Léna ◽  
Claude Miaud ◽  
...  
Keyword(s):  
Body Size ◽  
Body Condition ◽  
Negative Influence ◽  
The Body ◽  
Amphibian Conservation ◽  
Natural Habitats ◽  
Vehicle Traffic ◽  
Individual Level ◽  
Bombina Variegata ◽  
The Individual

AbstractAmphibians are considered to be the most threatened group of vertebrates. Among the multiple factors involved in their decline, habitat loss and alteration as a result of human activities is a major threat. At the individual level the effects of habitat alteration are potentially multiple, including a range of morphological and physiological responses. Analysing and understanding these responses is therefore a critical challenge for amphibian conservation. We examined the influence of intensive vehicle traffic (motorbikes and trucks on unpaved pathways) on the body size and condition and on the production of glucocorticoids (i.e. corticosterone) in the yellow-bellied toad Bombina variegata. In particular, we tested the hypothesis that intensive vehicle traffic has a negative influence on body size and body condition, and postulated that it also increases corticosterone production. Using morphometric data and saliva samples collected from four populations in France, we found that intensive vehicle traffic is associated with a decrease in body size and body condition in both males and females. Furthermore, our analysis revealed that corticosterone production was lower in both sexes in populations experiencing intensive vehicle traffic. We suggest that measures should be applied to reduce vehicle traffic intensity on unpaved pathways during toad breeding activity. This is critical for B. variegata, for which man-made ruts and residual puddles could mitigate the loss of natural habitats.

A review of noteworthy/major innovations in wearable clothing for thermal and moisture management from material to fabric structure

2021 ◽  
pp. 004051752110277
Author(s):  
Hafiz Muhammad Kaleem Ullah ◽  
Joseph Lejeune ◽  
Aurélie Cayla ◽  
Mélanie Monceaux ◽  
Christine Campagne ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
The Body ◽  
Innovative Strategies ◽  
Individual Level ◽  
Thermal Range ◽  
Moisture Management ◽  
Wide Range ◽  
The Individual ◽  
Air Conditioning Systems ◽  
Body Heat

The human body exchanges heat through the environment by various means, such as radiation, evaporation, conduction, and convection. Thermo-physiological comfort is associated with the effective heat transfer between the body and the atmosphere, maintaining the body temperature in a tolerable thermal range (36.5–37.5ºC). In order to ensure comfort, the body heat must be preserved or emitted, depending on external conditions. If the body heat is not properly managed, it can cause hyperthermia, heatstroke, and thermal discomfort. Conventionally, heating, ventilation, and air conditioning systems are used to provide comfort. However, they require a huge amount of energy, leading to an increase in global warming, and are limited to indoor applications. In recent decades, scientists across the world have been working to provide thermal comfort through wearable innovative textiles. This review article presents recent innovative strategies for moisture and/or thermal management at the material, filament/fiber, yarn, and fabric scales. It also summarizes the passive/active textile models for comfort. Integrating electrical devices in garments can rapidly control the skin temperature, and is dynamic and useful for a wide range of environmental conditions. However, their use can be limited in some situations due to their bulky design and batteries, which must be frequently recharged. Furthermore, adaptive textiles enable the wearer to maintain comfort in various temperatures and humidity without requiring batteries. Using these wearable textiles is convenient to provide thermal comfort at the individual level rather than controlling the entire building temperature.

Singapore's Changing Demography, the Eldercare Predicament and Transnational ‘Care’ Migration

2014 ◽  
Vol 2 (2) ◽  
pp. 247-269 ◽  
Author(s):  
Brenda S.A. Yeoh ◽  
Shirlena Huang
Keyword(s):  
Social Reproduction ◽  
Transnational Migration ◽  
Division Of Labour ◽  
The Body ◽  
Individual Level ◽  
Care Chain ◽  
Transnational Family ◽  
The Individual ◽  
City State ◽  
The City

AbstractScholars have recently argued that globalisation processes have significantly altered not just the productive but reproductive sphere. ‘Reproduction’ is formulated to include both biological and social reproduction, and which at the individual level requires ‘care’ throughout the life-cycle – that is, from cradle to grave – in sustaining the body in its corporeal and affective aspects. Concepts that have emerged in the literature in recent decades such as the ‘transnational family’, ‘global householding’ and ‘global care chain’ draw attention to the observation that the formation and sustenance of households is increasingly reliant on the international movement of people and transactions among household members residing in more than one national territory. Applying these notions to the context of the city-state of Singapore where the predicament around eldercare (resulting essentially from rapid fertility decline, shortages of Singapore women's reproductive labour and rigidities in the gender household division of labour) accompanies rapid globalisation, this paper examines strategies of care substitution which draw on the lowly paid labour of two groups of transnational subjects (mainly women) – transnational domestic workers working in the privatised sphere of the home, and transnational healthcare workers in institutionalised settings. The paper reflects upon the interdependencies between flows of transnational care migration and delves into the gender and class implications of these flows for an understanding of the links between transnational migration and social change.

scholarly journals Conservation physiology for applied management of marine fish: an overview with perspectives on the role and value of telemetry

2012 ◽  
Vol 367 (1596) ◽  
pp. 1746-1756 ◽  
Author(s):  
J. D. Metcalfe ◽  
W. J. F. Le Quesne ◽  
W. W. L. Cheung ◽  
D. A. Righton
Keyword(s):  
Marine Fish ◽  
Physiological Responses ◽  
Interdisciplinary Studies ◽  
Physiological Effects ◽  
Conservation Physiology ◽  
Individual Level ◽  
Constructive Dialogue ◽  
In The Wild ◽  
The Individual ◽  
Conservation And Management

Physiological studies focus on the responses of cells, tissues and individuals to stressors, usually in laboratory situations. Conservation and management, on the other hand, focus on populations. The field of conservation physiology addresses the question of how abiotic drivers of physiological responses at the level of the individual alter requirements for successful conservation and management of populations. To achieve this, impacts of physiological effects at the individual level need to be scaled to impacts on population dynamics, which requires consideration of ecology. Successfully realizing the potential of conservation physiology requires interdisciplinary studies incorporating physiology and ecology, and requires that a constructive dialogue develops between these traditionally disparate fields. To encourage this dialogue, we consider the increasingly explicit incorporation of physiology into ecological models applied to marine fish conservation and management. Conservation physiology is further challenged as the physiology of an individual revealed under laboratory conditions is unlikely to reflect realized responses to the complex variable stressors to which it is exposed in the wild. Telemetry technology offers the capability to record an animal's behaviour while simultaneously recording environmental variables to which it is exposed. We consider how the emerging insights from telemetry can strengthen the incorporation of physiology into ecology.

scholarly journals Body-shape trajectories and their genetic variance component in Gilthead seabream (Sparus aurata L.)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Stefanos Fragkoulis ◽  
Dimosthenis Kerasovitis ◽  
Costas Batargias ◽  
George Koumoundouros
Keyword(s):  
Body Shape ◽  
Sparus Aurata ◽  
Juvenile Fish ◽  
Rapid Change ◽  
The Body ◽  
Phenotypic Integration ◽  
Quality Trait ◽  
Gilthead Seabream ◽  
Ontogenetic Trajectories ◽  
Important Quality

AbstractThe phenotype of juvenile fish is closely associated with the adult phenotype, thus consisting an important quality trait for reared fish stocks. In this study, we estimated the correlation between the juvenile and adult body-shape in Gilthead seabream, and examined the genetic basis of the ontogenetic trajectories. The body shape of 959 pit-tagged fish was periodically examined during the juvenile-to-adult period. Individual shape ontogenetic trajectories were studied in respect to the initial (juvenile) and final (adult) phenotypes, as well as to the rate that adult phenotype is attained (phenotypic integration rate). We found that the juvenile body-shape presented a rapid change up to 192.7 ± 1.9 mm standard length, followed by a phenotypically stable period (plateau). Depending on the shape component considered, body-shape correlations between juvenile and adult stages ranged from 0.22 to 0.76. Heritability estimates (h2) of the final phenotype ranged from 0.370 ± 0.077 to 0.511 ± 0.089, whereas h2 for the phenotypic integration rate was 0.173 ± 0.062. To our knowledge, this is the first study demonstrating that the variance of the ontogenetic trajectories has a substantial additive genetic component. Results are discussed in respect to their potential use in selective breeding programs of Gilthead seabream.

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