Effects of Familiarity and Population Density on Competitive Interactions and Growth: An Experimental Study on a Territorial Salmonid Fish

Ethology ◽  
2015 ◽  
Vol 121 (12) ◽  
pp. 1202-1211 ◽  
Author(s):  
Libor Závorka ◽  
Joacim Näslund ◽  
David Aldvén ◽  
Johan Höjesjö ◽  
Jörgen I. Johnsson
Keyword(s):  
Experimental Study ◽  
Population Density ◽  
Salmonid Fish ◽  
Competitive Interactions

Experimental Study on Population Density of Different Occupant Types in Supermarket Evacuation

2014 ◽  
Vol 24 (1) ◽  
pp. 123-140
Author(s):  
Guowei Zhang ◽  
Guoqing Zhu ◽  
Lili Huang
Keyword(s):  
Experimental Study ◽  
Population Density

An experimental study of competitive interference between Anigozanthos manglesii D. Don, A. humilis Lindl. and their F1 Hybrids (Haemodoraceae)

1978 ◽  
Vol 26 (6) ◽  
pp. 807 ◽  
Author(s):  
SD Hooper
Keyword(s):  
Experimental Study ◽  
Competitive Interactions ◽  
F1 Hybrids ◽  
Minor Role ◽  
Naturally Occurring ◽  
Competitive Interference ◽  
Competitive Disadvantage ◽  
Major Factors ◽  
A Minor ◽  
Hybrid Distribution

Poor competitive ability has been invoked often to explain the confinement of hybrids to disturbed ecotones at the junction of parental habitats. This hypothesis has not as yet been verified in an experimental study. Two-month-old seedlings of Anigozanthos manglesii, A, humilis and synthesized F1 hybrids were grown singly and in various paired combinations in small pots for 172 days to test for competitive interactions. F1 hybrids and A. manglesii performed comparably in most competition trials, while A. humilis suffered a considerable competitive disadvantage. It is proposed that competitive interactions may play a minor role in confining naturally occurring F1 hybrids to ecotonal areas between habitats preferentially occupied by A. humilis and A. manglesii. Spatial limitations on pollen and seed flow appear to be the major factors controlling hybrid distribution in this case.

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