The Relationship Between Marking Patterns and Motivational State in the Pre-Spawning Behaviour of the Cichlid Fish Chromidotilapia Guentheri (Sauvage)

1985 ◽  
Vol 36 (1) ◽  
pp. 88-116 ◽  
Author(s):  
R. Vodegel ◽  
G.P. Baerends ◽  
J.B.W. Wanders
Keyword(s):  
Cichlid Fish ◽  
Motivational State ◽  
Spawning Behaviour ◽  
The Relationship

The relationship between growth, brain asymmetry and behavioural lateralization in a cichlid fish

2009 ◽  
Vol 201 (1) ◽  
pp. 223-228 ◽  
Author(s):  
Adam R. Reddon ◽  
Cristián Gutiérrez-Ibáñez ◽  
Douglas R. Wylie ◽  
Peter L. Hurd
Keyword(s):  
Cichlid Fish ◽  
Brain Asymmetry ◽  
The Relationship

Influence of Chicks and Food Quality on Food Calling in Broody Domestic Hens

Behaviour ◽  
1999 ◽  
Vol 136 (7) ◽  
pp. 919-933 ◽  
Author(s):  
J.S. Pierre ◽  
J.P. Richard ◽  
M.A. Richard-Yris ◽  
A.M. Wauters ◽  
Keyword(s):  
Social Context ◽  
Food Quality ◽  
Social Situations ◽  
Motivational State ◽  
Food Call ◽  
Call Production ◽  
The Relationship ◽  
Different Levels

AbstractThe aim of this study was to understand the relationship between production of food calls by maternal hens and both food quality and social context. Nineteen broody hens were tested in twenty experiments combining four different food contexts with five social situations in which they could receive different levels of stimuli from their chicks. Results revealed that the food call rates of broody hens were positively correlated with food quality (or motivational state with regard to food). They were also influenced by the caller's social context: presence of chicks, behaviour of chicks and separation from chicks modified food call production. These results are therefore consistent with previous reports on food calling by cockerels.

THE MEDIATING EFFECT OF WORK ENGAGEMENT ON THE RELATIONSHIP BETWEEN SELF-LEADERSHIP AND INDIVIDUAL INNOVATION

2015 ◽  
Vol 19 (01) ◽  
pp. 1550009 ◽  
Author(s):  
CATARINA GOMES ◽  
LUIS CURRAL ◽  
ANTÓNIO CAETANO
Keyword(s):  
Health Care ◽  
Work Engagement ◽  
High Performance ◽  
Positive Relationship ◽  
Leadership Skills ◽  
Integrated Health Care ◽  
Mediating Effect ◽  
Motivational State ◽  
Health Care Unit ◽  
The Relationship

It has already been demonstrated that individual innovation within the workplace is the fundamental underpinning of high-performance organisations. The aim of this study is to explore the relationship between self-leadership, work engagement and individual innovation. Because innovation manifests itself when individuals feel engaged with their work, we propose that this positive affective motivational state will mediate the relationship between self-leadership skills and individual innovation. To study these relationships, data were collected from a sample of 337 nurses and doctors who work at an integrated health care unit. Our results show a positive relationship between self-leadership, work engagement and individual innovation. Furthermore, the results showed that work engagement had a mediating effect on the relationship between self-leadership and individual innovation. Overall, this research will contribute towards gaining more insights into the role that self-leadership and work engagement play in individual innovation. In addition, it will provide insights into new interventions that promote the development of innovation at work.

La radiothyroïdectomie et son effet sur la consommation d'oxygène chez les cichlidés Aequidens latifrons

1971 ◽  
Vol 49 (3) ◽  
pp. 423-425 ◽  
Author(s):  
M.-L. Ruhland
Keyword(s):  
Oxygen Consumption ◽  
Thyroid Gland ◽  
Treatment Period ◽  
Fibrous Tissue ◽  
Thyroid Tissue ◽  
Cichlid Fish ◽  
Thyroid Cells ◽  
Rate Of Oxygen Consumption ◽  
The Relationship ◽  
Thiourea Treatment

The thyroidectomy produced after radioiodide immersion of the cichlid fish Aequidens latifrons during 5 months was characterized by progressive alterations of the thyroid tissue from the disappearance of colloid, the degeneration of thyroid cells until an intensive proliferation of fibrous tissue, which replaced the thyroid follicles of the gland. Autoradiographic examinations revealed a few microfollicles, which presented a small activity.The consequential effects on the respiratory exchanges are significant decreases of the oxygen consumption which are progressive and more important than the decreases obtained after thiourea treatment. The decreases reach a third of the normal rate of oxygen consumption, 32% after a long treatment period (150 days). This proves the relationship between the thyroid gland and the oxygen consumption of fishes.

Breeder-Helper Conflict in a Cichlid Fish With Broodcare Helpers: an Experimental Analysis

Behaviour ◽  
1985 ◽  
Vol 95 (1-2) ◽  
pp. 45-75 ◽  
Author(s):  
Michael Taborsky
Keyword(s):  
Experimental Analysis ◽  
Graphical Model ◽  
Cichlid Fish ◽  
Field Evidence ◽  
The Family ◽  
Cooperatively Breeding ◽  
Common Interests ◽  
Relationship Of ◽  
The Relationship ◽  
Sexually Mature

AbstractThis paper reports an experimental analysis of conflicting interests in the cooperatively breeding Lamprologus brichardi (Cichlidae). Helpers clearly prefer to stay in the family territory rather than leave for an aggregation of same-size young or for an unoccupied area-even when their chances of reproducing independently are superior to those in the field. Helpers usually attain independence when the breeders force them to leave the territory. Breeders' toleration of helpers depends on the stage in the reproductive cycle, the size of helpers and the need for helpers. Large, previously expelled helpers are reaccepted when competition is increased. In these circumstances breeders prefer their own former helpers to strange young. Experimental and field evidence suggests that 3 factors are ultimately important for the breeder/helper relationship: reproductive parasitism by mature helpers, eventual cannibalism on breeders' eggs and competition for shelter within the territory. A graphical model shows how the initially common interests of breeders and helpers develop divergently when helpers reach the size at which they become sexually mature and less susceptible to predation. Large helpers pay to stay. The relationship of breeders and large helpers meets the criterion of reciprocal altruism.

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