The population ecology of a natural population of the pierid butterfly Colias alexandra

Oecologia ◽  
1981 ◽  
Vol 49 (2) ◽  
pp. 188-200 ◽  
Author(s):  
Jane Leslie Hayes
Keyword(s):  
Natural Population ◽  
Population Ecology ◽  
Pierid Butterfly

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 and conservation status of the last natural population of English yew Taxus baccata in Denmark

1999 ◽  
Vol 88 (2) ◽  
pp. 173-182 ◽  
Author(s):  
Jens-Christian Svenning ◽  
Else Magård
Keyword(s):  
Natural Population ◽  
Population Ecology ◽  
Conservation Status ◽  
Taxus Baccata ◽  
English Yew

On the occurrence of an additional diploid taxon —Withania obtusifolia TÄCKH. (Solanaceae) — from the natural population of South India

1999 ◽  
Vol 110 (5-6) ◽  
pp. 419-422 ◽  
Author(s):  
G. Thirupur Sundari ◽  
S. Sudhakaran ◽  
A. Ganapathi
Keyword(s):  
Natural Population ◽  
South India ◽  
Diploid Taxon

Reproduction of the Roman snail (Helix pomatia L.) from a local natural population in farm conditions and in a natural habitat

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Maciej Ligaszewski ◽  
Przemysław Pol
Keyword(s):  
Natural Population ◽  
Natural Habitat ◽  
Local Population ◽  
Helix Pomatia ◽  
Second Phase ◽  
Animal Reproduction ◽  
Snail Helix Pomatia ◽  
June July ◽  
A Site

AbstractThe aim of this study was to compare the quality of clutches and reproduction results of two groups of Roman snails (Helix pomatia) from the same local population, laying eggs simultaneously in semi-natural farm conditions and in a natural habitat. The study material were Roman snails aged 2 or more years which had entered the third phenological season of their life and thus the first season of sexual maturity. Observations were conducted at an earthen enclosure in a greenhouse belonging to the experimental farm for edible snails at the National Research Institute of Animal Reproduction in Balice near Kraków (Poland) as well as at a site where a local population naturally occurs in the uncultivated park surrounding the Radziwiłł Palace. In the June-July season, differences among such parameters as weight of clutch, number of eggs in clutch, mean egg weight, and hatchling percentage when compared to the total number of eggs in the clutch were compared. It was determined that clutches of eggs from the natural population laid in the greenhouse were of lesser weight (P<0.01), contained fewer eggs (P<0.05), and the mean weight of individual eggs was less (P<0.05) than in clutches laid simultaneously in a natural habitat. Both in the greenhouse and the natural habitat, in the first phase of laying eggs (June) the weight of the clutch and number of eggs its contained were greater than in the second phase (July). However, only for snails laying eggs in the greenhouse were these differences statistically significant (P<0.05) and highly significant (P<0.01), respectively. Statistically significant differences were not observed in hatchling percentage between eggs laid in the greenhouse and the natural habitat. The lower number of eggs laid in the farmed conditions of the greenhouse was successfully compensated for by the absence of mass destruction by rodents which occurred in the natural habitat.

Identification of SSR Markers Linked to Oil Content in Peanut (Arachis hypogaea L.) through RIL Population and Natural Population

2012 ◽  
Vol 37 (11) ◽  
pp. 1967-1974 ◽  
Author(s):  
Li HUANG ◽  
Xin-Yan ZHAO ◽  
Wen-Hua ZHANG ◽  
Zhi-Ming FAN ◽  
Xiao-Ping REN ◽  
...  
Keyword(s):  
Natural Population ◽  
Arachis Hypogaea ◽  
Ssr Markers ◽  
Oil Content ◽  
Ril Population

Renessaince of Population Ecology: An Explanation for Performance of a Firm and its Survival

2011 ◽  
Author(s):  
Narayana V. L. Bhyrovabhotla
Keyword(s):  
Population Ecology

Population Ecology of Individuals. (MPB-25), Volume 25

2020 ◽  
Author(s):  
ADAM ŁOMNICKI
Keyword(s):  
Population Ecology
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