Effect of coffee residues on growth and reproduction of Hyperiodrilus africanus (Oligochaeta, Eudrilidae) in Ivory Coast

1998 ◽  
Vol 26 (4) ◽  
pp. 336-340 ◽  
Author(s):  
E. J. Tondoh
Keyword(s):  
Ivory Coast ◽  
Hyperiodrilus Africanus ◽  
Coffee Residues ◽  
Growth And Reproduction

Population dynamics of Hyperiodrilus africanus (Oligochaeta, Eudrilidae) in Ivory Coast

2005 ◽  
Vol 21 (5) ◽  
pp. 493-500 ◽  
Author(s):  
Jérôme Ebagnerin Tondoh ◽  
Patrick Lavelle
Keyword(s):  
Population Dynamics ◽  
Ivory Coast ◽  
Secondary Forest ◽  
Adaptive Strategies ◽  
Seasonal Abundance ◽  
Population Abundance ◽  
Seasonal Fluctuations ◽  
Abundance Patterns ◽  
Natural Reserve ◽  
Hyperiodrilus Africanus

The population dynamics of the exotic earthworm Hyperiodrilus africanus was investigated in a secondary forest of the Natural Reserve of Lamto (Ivory Coast) over a period of 19 mo. The objectives were to assess seasonal abundance patterns and to determine the adaptive strategies of this species. Each month, 10 soil samples of 100×100×40 cm and 20 monolith samples of 25×25×30 cm were randomly excavated in a plot of 50×95 m and earthworms were extracted by both hand-sorting and wash-sieving methods. The results show significant inter-annual and seasonal fluctuations in population size. Three factors are likely to control population dynamics: (1) rainfall, (2) soil water content and (3) seasonality. The dry season appears to be the most important environmental factor that regulates population abundance when predation, density-dependent regulation and competition phenomena are ignored. Hyperiodrilus africanus exhibited an r strategy, suggesting a high ability to recover populations affected by drought.

The influences of density on growth and reproduction in moose Alces alces

2000 ◽  
Vol 6 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Steven H. Ferguson ◽  
Alan R. Bisset ◽  
François Messier
Keyword(s):  
Alces Alces ◽  
Growth And Reproduction

THE EFFECTS OF TEMPERATURE ON THE GROWTH AND REPRODUCTION IN SIMOCEPHALUS HIMALAYENSIS

2010 ◽  
Vol 36 (4) ◽  
pp. 794-805 ◽  
Author(s):  
Xin-Lu SHI ◽  
Cai-Hua QI ◽  
Gui-Jie LIU ◽  
Shuang-Yan BAO ◽  
Xiao-Na HUANG
Keyword(s):  
Effects Of Temperature ◽  
Growth And Reproduction

EFFECTS OF MICROCYSTIS ON THE GROWTH AND REPRODUCTION OF DAPHNIA MAGNA

2010 ◽  
Vol 33 (6) ◽  
pp. 1198-1201
Author(s):  
Xiao-Yu LI ◽  
Zhi-Juan ZHANG ◽  
Lei LI
Keyword(s):  
Daphnia Magna ◽  
Growth And Reproduction
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