Population Ecology of the Intertidal Anemone Actinia tenebrosa I. Pedal Locomotion and Intraspecific Aggression

1978 ◽  
Vol 29 (6) ◽  
pp. 787 ◽  
Author(s):  
JR Ottaway
Keyword(s):  
Natural Population ◽  
Population Ecology ◽  
External Factors ◽  
Intraspecific Aggression ◽  
Column Diameter ◽  
Rock Substratum ◽  
Impact Injuries

Some 80 adult and over 250 juvenile A. tenebrosa, the total natural population on 2.5 m² of a stable rock substratum, were tracked for up to 738 days. In this period 24% of adults and 10% of juveniles moved > 250 mm, Some adults and many juveniles showed no discernible locomotion at all, although most juveniles survived less than 20 days. Large, directed movements of up to 1.6 m were sometimes associated with such external factors as impact injuries from moving rocks or logs, physical shocks, repeated desiccation, interference from molluscs, or wounding from intraspecific aggression. Acrorhagi are the nematocyst-bearing structures, present in most A. tenebrosa larger than about 10 mm column diameter, which are used in intraspecific conflicts. Some 44 % of adults were involved in fights with other adults over the 2 years of observations. None of those fights was fatal. Contact of two adult A. tenebrosa did not always result in an aggressive conflict, but after intraspecific aggression, in both field and laboratory situations, the wounded anemone moved directly away from the site of wounding.

Population Ecology of the Itertidal Anemone Actinia tenebrosa. III. Dynamics and Environmental Factors

1979 ◽  
Vol 30 (1) ◽  
pp. 41 ◽  
Author(s):  
JR Ottaway
Keyword(s):  
New Zealand ◽  
Mortality Rate ◽  
Environmental Factors ◽  
High Temperatures ◽  
Population Ecology ◽  
Benthic Invertebrates ◽  
Rocky Intertidal ◽  
Column Diameter ◽  
Juvenile Mortality ◽  
Impact Injuries

An isolated subpopulation of A. tenebrosa was studied, for three years, on the rocky intertidal coast at Kaikoura, New Zealand. The number of adults remained very stable: 94% of adults first seen in November 1973 survived until the observations were concluded. Adults died mainly from impact injuries caused by moving rocks and logs during gales. The number of juveniles in the colony fluctuated markedly from season to season, between 81 and 225 % of the number first seen. Most settlement was in the summer months, but some occurred throughout the year. The main causes of juvenile mortality were, in order of decreasing importance, failure to successfully attach leading to probable predation by benthic invertebrates, desiccation at low tides, dislodgement or crushing by grazing molluscs, impact injuries during gales, and exposure to combinations of excessive desiccation and high temperatures at low tides. Adult mortalities appeared to be independent of size. The rate of mortality of juveniles in their first 20 days after release from brooding adults is largely independent of juvenile size. After that, the mortality rate is negatively correlated with size until juveniles exceed about 15 mm column diameter: the smaller juveniles are more susceptible to both desiccation at low tide and to fatal interference from grazing molluscs.

Population ecology of the intertidal anemone Actinia tenebrosa. IV. Growth rates and longevities

1980 ◽  
Vol 31 (3) ◽  
pp. 385 ◽  
Author(s):  
JR Ottaway
Keyword(s):  
New Zealand ◽  
Population Ecology ◽  
Growth Rates ◽  
Mortality Data ◽  
Column Diameter ◽  
Growth Data ◽  
Sea Anemones ◽  
Free Living ◽  
Growth Increments ◽  
Rocky Coast

In all, 82 adults and about 600 juvenile A tenebrosa were tracked for up to 3 years These intertidal sea anemones were free-living on the rocky coast at Kaikoura, New Zealand Regular measurements of column diameters were taken for 2 years Annual growth increments were small for all sizes of A. tenebrosa observed most increments were in the range -2 to 4 mm of column diameter per year, with the smallest anemones havmg the fastest relative mean growth rates From the growth data, A tenebrosa reaches a column diameter of 40 mm in 8-66 years after settlement From mortality data, the observed adults have a predicted mean longevity of at least 50 years and a predicted maximum longevity of at least 210 years.

Interactive Experience and Identification as Predictors of Attributing Responsibility in Video Games

2018 ◽  
Vol 30 (1) ◽  
pp. 3-15
Author(s):  
Nathan Walter ◽  
Yariv Tsfati
Keyword(s):  
Video Game ◽  
Psychological Research ◽  
External Factors ◽  
Theoretical Expectation ◽  
Main Character ◽  
Attribution Of Responsibility ◽  
Attributions Of Responsibility ◽  
Violent Video Game ◽  
Grand Theft Auto Iv ◽  
Interactive Experience

Abstract. This study examines the effect of interactivity on the attribution of responsibility for the character’s actions in a violent video game. Through an experiment, we tested the hypothesis that identification with the main character in Grand Theft Auto IV mediates the effect of interactivity on attributions of responsibility for the main character’s antisocial behavior. Using the framework of the fundamental attribution error, we demonstrated that those who actually played the game, as opposed to those who simply watched someone else playing it, identified with the main character. In accordance with the theoretical expectation, those who played the game and came to identify with the main character attributed the responsibility for his actions to external factors such as “living in a violent society.” By contrast, those who did not interact with the game attributed responsibility for the character’s actions to his personality traits. These findings could be viewed as contrasting with psychological research suggesting that respondents should have distanced themselves from the violent protagonist rather than identifying with him, and with Iyengar’s (1991) expectation that more personalized episodic framing would be associated with attributing responsibility to the protagonist.

Pengembangan Butik Muslim yang Terkait dengan Pelayanan Prima dan Kualitas Produk pada Butik Firta Collection

Liquidity ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 97-107
Author(s):  
Esust Setiawati
Keyword(s):  
Strategic Management ◽  
Product Quality ◽  
Qualitative Method ◽  
Swot Analysis ◽  
External Environment ◽  
Marketing Mix ◽  
External Factors ◽  
Customer Trust

This study aims to analyze how strategic management in the Firta Collection Boutique to develop its business, especially in providing services to customers. The method used in this research is a qualitative method that includes Marketing Mix (4P Analysis) and SWOT Analysis, to find out what external factors are opportunities or threats to the Firta Collection Boutique. The results of the study show that the strategies adopted by the Firta Collection Boutique are still inappropriate and need to use other strategies. Changes in the external environment have continued to increase so that it is an opportunity and anticipates threats by utilizing strengths and minimizing weaknesses by innovating and improving approaches and gaining customer trust in product quality, in order to compete in the fashion sector.

External Factors of Big Business Transformation in Russia

2005 ◽  
pp. 72-89 ◽  
Author(s):  
Ya. Pappe ◽  
Ya. Galukhina
Keyword(s):  
Financial Market ◽  
Capital Market ◽  
Business Groups ◽  
External Factors ◽  
Big Business ◽  
Business Transformation ◽  
Global Standards ◽  
The World ◽  
Principal Subject

The paper is devoted to the role of the global financial market in the development of Russian big business. It proves that terms and standards posed by this market as well as opportunities it offers determine major changes in Russian big business in the last three years. The article examines why Russian companies go abroad to attract capital and provides data, which indicate the scope of this phenomenon. It stresses the effects of Russian big business’s interaction with the world capital market, including the modification of the principal subject of Russian big business from integrated business groups to companies and the changes in companies’ behavior: they gradually move away from the so-called Russian specifics and adopt global standards.

Problems of Science and Its Effectiveness

2011 ◽  
pp. 151-157 ◽  
Author(s):  
A. Varshavsky
Keyword(s):  
Higher Education ◽  
Public Management ◽  
External Factors ◽  
Education Sector ◽  
Russian Science ◽  
Russian Academy Of Sciences ◽  
Scientific Results ◽  
Academy Of Sciences ◽  
Academic Sector

The article considers current problems of Russia´s science. Special attention is paid to external factors that negatively influence its effectiveness including considerable lag in public management sector. The issues of opposing higher education sector to the Russian Academy of Sciences (RAS) are also discussed. A number of indicators of the Russian science and its academic sector effectiveness are presented. The expediency of comparing scientific results with R&D expenditures is shown. The problems connected with using bibliometric methods are discussed. Special attention is paid to the necessity of preserving and further developing Russian science including RAS.

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