scholarly journals Was the Chlamydial Adaptative Strategy to Tryptophan Starvation an Early Determinant of Plastid Endosymbiosis?

2016 ◽  
Vol 6 ◽  
Author(s):  
Ugo Cenci ◽  
Mathieu Ducatez ◽  
Derifa Kadouche ◽  
Christophe Colleoni ◽  
Steven G. Ball
Keyword(s):  
Adaptative Strategy

scholarly journals Occurrence of polygyny in Acromyrmex subterraneus molestans Santschi 1925 (Hymenoptera: Formicidae)

2004 ◽  
Vol 34 (5) ◽  
pp. 1611-1613 ◽  
Author(s):  
Danival José de Souza ◽  
José Lino Neto ◽  
Terezinha M. C. Della Lucia ◽  
Ethel Peternelli
Keyword(s):  
Ovarian Development ◽  
Fungus Garden ◽  
Morphological Differences ◽  
Adaptative Strategy

Polygyny denotes the coexistence of two or more mated and fertile queens in the colony. A colony of Acromyrmex subterraneus molestans Santschi containing 14 queens was collected on campus of the Universidade Federal de Viçosa, Brazil, aiming to verify if they were all egg-layers and fertile . The volume of the fungus garden in the nest was about 500 ml with a large number of larvae and pupae. Observation of the ovarian development and spermathecae indicates that 13 queens had copulated and ovary did not show morphological differences among them. This could indicate that polygyny is not accidental and may represent an adaptative strategy to optimize the development of the initial colony in A. subterraneus molestans.

scholarly journals Adaptative strategy to mitigate impacts of repetitive flooding of residents in Thailand's Ayutthaya province

2018 ◽  
Vol 10 (4) ◽  
pp. 931-937
Author(s):  
Nawhath Thanvisitthpon
Keyword(s):  
Psychological Consequences ◽  
Living Quarter ◽  
Flat Bottom ◽  
Individual Level ◽  
Local Residents ◽  
Upper Level ◽  
The Individual ◽  
Relief Efforts ◽  
Adaptative Strategy

Abstract This research investigates the socio-economic, behavioral, and psychological consequences of repetitive flooding on the residents of Ayutthaya's four flood-prone districts. The study also examines the individual-level adaptative strategies adopted by the local residents to coexist with the flooding. The findings revealed several challenges encountered by the flooded households. In addition, most of the respondents expressed a preference to live out the floods in their residences rather than relocating to a makeshift shelter. The ability to live through the floods was largely attributable to the architecture of their residences whereby the houses are raised a few meters above the ground with the living quarter on the upper level, which is the most prominent adaptative strategy. Other adaptative strategies included, e.g., the ownership of a flat-bottom boat and pre-flood stocking-up on basic necessities. Furthermore, in light of the residents’ preference to live out the repetitive flooding, this research also proposes a simple means to enhance the effectiveness of the localized flood relief efforts.

Re-evaluation of osmotic effects as a general adaptative strategy for bacteria in sub-freezing conditions

2001 ◽  
Vol 89 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Carol A. Mindock ◽  
Mayya A. Petrova ◽  
Rawle I. Hollingsworth
Keyword(s):  
Osmotic Effects ◽  
Adaptative Strategy

Dynamique de la population d'Orchestia mediterranea L. (Crustacé, Amphipode) dans l'estuaire du Bou Regreg (Maroc)

1985 ◽  
Vol 63 (12) ◽  
pp. 2800-2809 ◽  
Author(s):  
B. Elkaïm ◽  
J. P. Irlinger ◽  
S. Pichard
Keyword(s):  
Population Structure ◽  
Statistical Analysis ◽  
Sex Ratio ◽  
Population Ecology ◽  
Seasonal Variations ◽  
Reproductive Potential ◽  
Reproductive Activity ◽  
Brood Number ◽  
Complex Manner ◽  
Adaptative Strategy

Some aspects of the population ecology of Orchestia mediterranea, found in the estuary of Bou Regreg (Morocco), were studied over the course of 1 year. Histograms of cohort frequency and observations on reproductive activity showed seasonal variations all year long: O. mediterranea can be characterized as a multivoltine, semiannual species. By statistical analysis, associated with a procedure near successive maxima, the population structure was determined by identifying cohorts that are associated in a complex manner. All these characteristics are similar to those of O. mediterranea and Talorchestia deshayesei found in the Mediterranean Sea. The exceptionally high annual reproductive potential estimated from the fecundity (which varies with the age of females and with the seasons), the sex ratio, and the brood number of the successive cohorts from the same filiation, all in a nutrient-rich environment, suggests an r type of adaptative strategy.

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