Basic features, conjunctive searches, and the confusion effect in predator–prey interactions

2008 ◽  
Vol 63 (3) ◽  
pp. 473-475 ◽  
Author(s):  
Colin R. Tosh ◽  
Jens Krause ◽  
Graeme D. Ruxton
2017 ◽  
Author(s):  
Sonja M. Ehlers ◽  
Ricardo A. Scrosati ◽  
Julius A. Ellrich

AbstractPredators have often been shown to have nonconsumptive effects (NCEs) on prey behaviour, but the demographic consequences for prey remain poorly known. This is important to understand because demography influences the impact of a species in its community. We used an intertidal predator–prey system to investigate predator NCEs on prey recruitment, a key demographic process for population persistence. Pelagic mussel larvae are known to avoid waterborne cues from dogwhelks, which prey on intertidal mussels. Through a field experiment done in Atlantic Canada, we manipulated the presence of dogwhelks in intertidal habitats during the mussel recruitment season. We measured mussel recruitment in collectors that could be reached by waterborne dogwhelk cues but not by dogwhelks themselves. We found that the nearby presence of dogwhelks significantly decreased mussel recruit density. A previous study done in the same habitats under the same experimental conditions showed that dogwhelk cues also limit the recruitment of barnacles, another prey item for dogwhelks. However, such NCEs were four times stronger than those observed for mussel recruitment. This difference relates well to the higher ability of mussels to escape predation, as mussels can relocate while barnacles cannot. Therefore, basic features of natural history may be useful to predict predator NCEs on prey recruitment.


2003 ◽  
Vol 62 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Marek Nieznanski

The aim of the study was to explore the basic features of self-schema in persons with schizophrenia. Thirty two schizophrenic patients and 32 normal controls were asked to select personality trait words from a check-list that described themselves, themselves as they were five years ago, and what most people are like. Compared with the control group, participants from the experimental group chose significantly more adjectives that were common to descriptions of self and others, and significantly less that were common to self and past-self descriptions. These results suggest that schizophrenic patients experience their personality as changing over time much more than do healthy subjects. Moreover, their self-representation seems to be less differentiated from others-representation and less clearly defined than in normal subjects.


1997 ◽  
Author(s):  
Alan B. Bond ◽  
Alan C. Kamil ◽  
Christopher Cink
Keyword(s):  

1970 ◽  
Vol 7 (1) ◽  
pp. 198-207
Author(s):  
Євген Карпенко

У статті проаналізовано місце феномену емоційної компетентності в становленні дискурсу життєтворення особистості. Відзначено, що її засадничими ознаками є відкритість і діалогічність, що фасилітують процеси життєтворчості в інтра- та інтерпсихічному просторі та сприяють здобуттю певних експірієнтальних «знань» і формуванню відповідних комунікативних «умінь». Отже, емоційна компетентність виконує функцію орієнтації в знаково-символічній реальності внутрішнього та зовнішнього середовища і, відповідно, бере участь у прийнятті рішень стосовно них. Це сприяє реалізації функції особистісного вибору у значущих обставинах життя. Вважається, що цей вибір повинен ґрунтуватися на домінуючій екзистенційній ідентичності та релевантно реалізовуватися на всіх її рівнях: базовому, характерологічному, ситуативному. В цьому контексті емоційна компетентність виступає в якості з’єднувальної ланки між ідентичністю та її зовнішньою поведінковою маніфестацією, в якій вона, власне, й проявляється. Інтегруючи первинні емоції, емоційна компетентність сприяє формуванню системи цінностей, мотивів і світоглядних орієнтацій особистості, а також сприяє їх коректному втіленню в практиці міжособистісного спілкування і, відповідно, конструювання дискурсу власного життя. У цьому полягає ключова роль емоційної компетентності в процесі життєтворення особистості. The article analyzes the role of emotional competence in establishing the discourse of personal life creation. It has been stated that its basic features are openness and readiness to dialog that facilitate life creation processes in the intra- and interpsychic space and promote acquirement of certain experiential "knowledge" as well as formation of relevant communicative "skills". So, emotional competence has a function of orienting in sign and symbol reality of the internal and external environment and, therefore, takes part in decision-making in respect thereof. This enables realization of the function of personal choice in significant life circumstances.  This choice is considered to be based on dominant existential identity and realized in the relevant manner at all its levels: basic, characterological, situational. In this sense emotional competence forms a link between identity and its outer behavioral manifestation.  While integrating primary emotions emotional competence facilitates formation of a system of values, motives and world view of personality as well as their correct implementation in the course of interpersonal communication and personal life discourse construction. This embodies the key role of emotional competence in the process of life creation of personality.


2014 ◽  
Vol 155 (21) ◽  
pp. 822-827
Author(s):  
Ágnes Váradi

The question of electronic solutions in public health care has become a contemporary issue at the European Union level since the action plan of the Commission on the e-health developments of the period between 2012 and 2020 has been published. In Hungary this issue has been placed into the centre of attention after a draft on modifications of regulations in health-care has been released for public discourse, which – if accepted – would lay down the basics of an electronic heath-service system. The aim of this paper is to review the basic features of e-health solutions in Hungary and the European Union with the help of the most important pieces of legislation, documents of the European Union institutions and sources from secondary literature. When examining the definition of the basic goals and instruments of the development, differences between the European Union and national approaches can be detected. Examination of recent developmental programs and existing models seem to reveal difficulties in creating interoperability and financing such projects. Finally, the review is completed by the aspects of jurisdiction and fundamental rights. It is concluded that these issues are mandatory to delineate the legislative, economic and technological framework for the development of the e-health systems. Orv. Hetil., 2014, 155(21), 822–827.


2019 ◽  
Vol 19 (1) ◽  
pp. 7-37
Author(s):  
Aleksandra Kustra-Rogatka

Summary The paper deals with the changes in the centralized (Kelsenian) model of constitutional review resulting from a state’s membership of the EU, which unequivocally demonstrates the decomposition of the classic paradigm of constitutional judiciary. The main point raised in the paper is that European integration has fundamentally influenced on the four above-mentioned basic elements of the Kelsenian model of constitutional review of legislation, which are the following: the assumption of the hierarchical construction of a legal system; the assumption of the supreme legal force of the constitution as the primary normative act of a given system; a centralised model of reviewing hierarchical conformity of legal norms; coherence of the system guaranteed by a constitutional court’s power to declare defectiveness of a norm and the latter’s derogation. All its fundamental elements have evolved, i.e. the hierarchy of the legal system, the overriding power of the constitution, centralized control of constitutionality, and the erga omnes effect of the ruling on the hierarchical non-conformity of the norms. It should be noted that over the last decade the dynamics of these changes have definitely gained momentum. This has been influenced by several factors, including the “great accession” of 2004, the pursuit of formal constitutionalization of the EU through the Constitutional Treaty, the compromise solutions adopted in the Treaty of Lisbon, the entry into force of the Charter, and the prospect of EU accession to the ECHR. The CJEU has used these factors to deepen the tendencies towards decentralization of constitutional control, by atomising national judicial systems and relativizing the effects of constitutional court rulings within national legal systems. The end result is the observed phenomenon, if not of marginalisation, then at least of a systemic shift in the position of constitutional courts, which have lost their uniqueness and have become “only ones of many” national courts.


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