Adaptation under Changing Environments with Various Rates of Inheritance of Acquired Characters

1999 ◽  
pp. 34-41 ◽  
Author(s):  
Takahiro Sasaki ◽  
Mario Tokoro
Keyword(s):  
Changing Environments ◽  
Inheritance Of Acquired Characters ◽  
Acquired Characters

Evolving Learnable Neural Networks Under Changing Environments with Various Rates of Inheritance of Acquired Characters: Comparison of Darwinian and Lamarckian Evolution

1999 ◽  
Vol 5 (3) ◽  
pp. 203-223 ◽  
Author(s):  
Takahiro Sasaki ◽  
Mario Tokoro
Keyword(s):  
Neural Networks ◽  
Environmental Changes ◽  
Dynamic Environments ◽  
Abstract Model ◽  
Changing Environments ◽  
Lamarckian Evolution ◽  
Inheritance Of Acquired Characters ◽  
Acquired Characters ◽  
Successive Generations ◽  
The Relationship

The processes of adaptation in natural organisms consist of two complementary phases: learning, occurring within each individual's lifetime, and evolution, occurring over successive generations of the population. In this article, we study the relationship between learning and evolution in a simple abstract model, where neural networks capable of learning are evolved using genetic algorithms (GAs). Individuals try to maximize their life energy by learning certain rules that distinguish between two groups of materials: food and poison. The connective weights of individuals' neural networks undergo modification, that is, certain characters will be acquired, through their lifetime learning. By setting various rates for the heritability of acquired characters, which is a motive force of Lamarckian evolution, we observe adaptational processes of populations over successive generations. Paying particular attention to behaviors under changing environments, we show the following results. Populations with lower rates of heritability not only show more stable behavior against environmental changes, but also maintain greater adaptability with respect to such changing environments. Consequently, the population with zero heritability, that is, the Darwinian population, attains the highest level of adaptation to dynamic environments.

Lamarck’s Two Legacies: A 21st-Century Perspective on Use-Disuse and the Inheritance of Acquired Characters

2015 ◽  
Vol 3 (5) ◽  
Author(s):  
Eva Jablonka ◽  
Ehud Lamm
Keyword(s):  
21St Century ◽  
Cultural Evolution ◽  
Historical Context ◽  
Physiological Model ◽  
Future Generations ◽  
Biological Plasticity ◽  
Inheritance Of Acquired Characters ◽  
The Law ◽  
Acquired Characters

<p class="p1"><span class="s1"><strong>Abstract </strong></span>| Lamarck has left many legacies for future generations of biologists<span class="s2"><strong>. </strong></span>His best known legacy was an explicit suggestion, developed in the <em>Philosophie zoologique </em>(PZ), that the effects of use and disuse (acquired characters) can be inherited and can drive species transformation.This suggestion was formulated as two laws, which we refer to as the law of biological plasticity and the law of phenotypic continuity<span class="s2"><strong>. </strong></span>We put these laws in their historical context and distinguish between Lamarck’s key insights and later neo-Lamarckian interpretations of his ideas<span class="s2"><strong>.</strong></span>We argue that Lamarck’s emphasis on the role played by the organization of living beings and his physiological model of reproduction are directly relevant to 21st-century concerns, and illustrate this by discussing intergenerational genomic continuity and cultural evolution.</p>

scholarly journals Inheritance of Acquired Characters

Nature ◽  
1933 ◽  
Vol 131 (3299) ◽  
pp. 95-95
Author(s):  
R. L. JENKINS
Keyword(s):  
Inheritance Of Acquired Characters ◽  
Acquired Characters

scholarly journals Lamarck, Evolution, and the Inheritance of Acquired Characters

Genetics ◽  
2013 ◽  
Vol 194 (4) ◽  
pp. 793-805 ◽  
Author(s):  
Richard W. Burkhardt
Keyword(s):  
Inheritance Of Acquired Characters ◽  
Acquired Characters

scholarly journals Experiments on the egg-laying instincts of the sawfly, Pontania salicis Christ., and their bearing on the inheritance of acquired characters; with some remarks on a new principle in evolution

1927 ◽  
Vol 101 (707) ◽  
pp. 115-126 ◽  
Keyword(s):  
Food Habits ◽  
Calluna Vulgaris ◽  
Egg Laying ◽  
Food Plant ◽  
Direct Result ◽  
Natural Manner ◽  
In Captivity ◽  
Inheritance Of Acquired Characters ◽  
Acquired Characters

In the course of genetical investigations (Harrison, 1920) in the lepidopterous genus Oporabia I conceived the idea that the inherited instinct of Oporabia filigrammaria HS. to deposit its eggs on heather ( Calluna vulgaris ) was the direct result of long-continued isolation on treeless heather-clad moorlands, involving a compulsory diet of that plant; in other words, I felt that the development of the instinct and its inheritance were Lamarckian effects. To test these views experimentally, by attempting a transference in the food habits of other insects, seemed far from difficult, and search was forthwith made for material easy to manipulate in captivity. No forms appeared more adapted for the purpose than the Geometrid moths Lycia hirtaria Cl. and Phigalia pedaria F., which I had employed in former experiments. However, the technique adopted, at any rate as applied to these insects, proved unsatisfactory and had therefore to be modified. Unexpected difficulties, riot in securing oviposition in a state of semicaptivity but in its taking place in a natural manner on the food plant, were immediately encountered.

The Inheritance of Acquired Characters

Nature ◽  
1932 ◽  
Vol 129 (3268) ◽  
pp. 900-901 ◽  
Author(s):  
E. W. MACBRIDE
Keyword(s):  
Inheritance Of Acquired Characters ◽  
Acquired Characters
Sign in / Sign up

Export Citation Format

Share Document