I’m starting to read an ecology book, and have a few questions.

1. Of what practical use is the Darwinian Demon ?

Could a giant clam be thought of as a close approximation to a Darwinian Demon because of its indefinitely long lifespan and lack of predators?

2. Metapopulations increase species longevity because it allows reseeding after one semi-isolated population goes extinct. Human beings are well known for producing “artificially fragmented habitats” for wild species. This seems to imply that the fragmentation of habitats by human beings aids species survival. But I’m not convinced.

What do the mathematical models of metapopulation interactions say about this?

https://en.wikipedia.org/wiki/Darwinian_Demon

i’m not sure a hypothetical organism (type) living indefinitely really qualifies as or for Darwinian demon, perhaps arguably it doesn’t

seems contradictory of some fundamentals of the purpose of replication with variation, but then to not include it as part of demon characteristics would probably be neglectful, in any related thought exercise

mollwollfumble said:

I’m starting to read an ecology book, and have a few questions.

1. Of what practical use is the Darwinian Demon ?

Could a giant clam be thought of as a close approximation to a Darwinian Demon because of its indefinitely long lifespan and lack of predators?

2. Metapopulations increase species longevity because it allows reseeding after one semi-isolated population goes extinct. Human beings are well known for producing “artificially fragmented habitats” for wild species. This seems to imply that the fragmentation of habitats by human beings aids species survival. But I’m not convinced.

What do the mathematical models of metapopulation interactions say about this?

Well TATE says:
“biologists use Darwinian Demons in thought experiments to understand different life history strategies among different organisms.”

but I presume you read that, so I’m not sure what sort of “practical use” you are after.

The Rev Dodgson said:

mollwollfumble said:

I’m starting to read an ecology book, and have a few questions.

1. Of what practical use is the Darwinian Demon ?

Could a giant clam be thought of as a close approximation to a Darwinian Demon because of its indefinitely long lifespan and lack of predators?

2. Metapopulations increase species longevity because it allows reseeding after one semi-isolated population goes extinct. Human beings are well known for producing “artificially fragmented habitats” for wild species. This seems to imply that the fragmentation of habitats by human beings aids species survival. But I’m not convinced.

What do the mathematical models of metapopulation interactions say about this?

Well TATE says:
“biologists use Darwinian Demons in thought experiments to understand different life history strategies among different organisms.”

but I presume you read that, so I’m not sure what sort of “practical use” you are after.

I’m just wondering what the heck “thought experiments to understand different life history strategies among different organisms” is supposed to mean. What is a “life history strategy” for starters?

mollwollfumble said:

The Rev Dodgson said:

mollwollfumble said:

I’m starting to read an ecology book, and have a few questions.

1. Of what practical use is the Darwinian Demon ?

Could a giant clam be thought of as a close approximation to a Darwinian Demon because of its indefinitely long lifespan and lack of predators?

2. Metapopulations increase species longevity because it allows reseeding after one semi-isolated population goes extinct. Human beings are well known for producing “artificially fragmented habitats” for wild species. This seems to imply that the fragmentation of habitats by human beings aids species survival. But I’m not convinced.

What do the mathematical models of metapopulation interactions say about this?

Well TATE says:
“biologists use Darwinian Demons in thought experiments to understand different life history strategies among different organisms.”

but I presume you read that, so I’m not sure what sort of “practical use” you are after.

I’m just wondering what the heck “thought experiments to understand different life history strategies among different organisms” is supposed to mean. What is a “life history strategy” for starters?

Good question.

I’ll have a think about it.

The Rev Dodgson said:

mollwollfumble said:

The Rev Dodgson said:

Well TATE says:
“biologists use Darwinian Demons in thought experiments to understand different life history strategies among different organisms.”

but I presume you read that, so I’m not sure what sort of “practical use” you are after.

I’m just wondering what the heck “thought experiments to understand different life history strategies among different organisms” is supposed to mean. What is a “life history strategy” for starters?

Good question.

I’ll have a think about it.

an abstraction to consider biohistory, the likely mechanisms involved of the latter, reverse engineering if you will what they might be

strategies are ways, that can be conceived as mechanisms

transition said:

The Rev Dodgson said:

mollwollfumble said:

I’m just wondering what the heck “thought experiments to understand different life history strategies among different organisms” is supposed to mean. What is a “life history strategy” for starters?

Good question.

I’ll have a think about it.

an abstraction to consider biohistory, the likely mechanisms involved of the latter, reverse engineering if you will what they might be

strategies are ways, that can be conceived as mechanisms

Life history theory is an analytical framework designed to study the diversity of life history strategies used by different organisms throughout the world, as well as the causes and results of the variation in their life cycles. It is a theory of biological evolution that seeks to explain aspects of organisms’ anatomy and behavior by reference to the way that their life histories—including their reproductive development and behaviors, post-reproductive behaviors, and lifespan (length of time alive)—have been shaped by natural selection. A life history strategy is the “age- and stage-specific patterns” and timing of events that make up an organism’s life, such as birth, weaning, maturation, death, etc. These events, notably juvenile development, age of sexual maturity, first reproduction, number of offspring and level of parental investment, senescence and death, depend on the physical and ecological environment of the organism.

The theory was developed in the 1950s and is used to answer questions about topics such as organism size, age of maturation, number of offspring, life span, and many others. In order to study these topics, life history strategies must be identified, and then models are constructed to study their effects. Finally, predictions about the importance and role of the strategies are made and these predictions are used to understand how evolution affects the ordering and length of life history events in an organism’s life, particularly the lifespan and period of reproduction. Life history theory draws on an evolutionary foundation, and studies the effects of natural selection on organisms, both throughout their lifetime and across generations. It also uses measures of evolutionary fitness to determine if organisms are able to maximize or optimize this fitness, by allocating resources to a range of different demands throughout the organism’s life. It serves as a method to investigate further the “many layers of complexity of organisms and their worlds”.

Organisms have evolved a great variety of life histories, from Pacific salmon, which produce thousands of eggs at one time and then die, to human beings, who produce a few offspring over the course of decades. The theory depends on principles of evolutionary biology and ecology and is widely used in other areas of science.