Your browser (Internet Explorer 8 or lower) is out of date. It has known security flaws and may not display all features of this and other websites. Learn how to update your browser.

X

Menu

Sustainability

Fixed Quota versus Fixed Effort Jenna Specker

Jenna Specker
This model incorporates several options in examining fisheries dynamics and fisheries employment. The two most important aspects are the choice between I)managing based on setting fixed quota versus setting fixed effort , and ii) using the 'scientific advice' for quota setting  versus allowing 'political influence' on quota setting (the assumption here is that you have good estimates of recruitment and stock assessments that form the basis of 'scientific advice' and then 'political influnce' that desires increased quota beyond the scientific advice).

Fishery Management Population Sustainability

  • 1 month 4 weeks ago

Clone of CARP - Carp AquacultuRe in Ponds

Te Kou Gage
This model simulates the growth of carp in an aquaculture pond, both with respect to production and environmental effects.

 Carp are mainly cultivated in Asia and Europe, and contribute to the world food supply.

Aquaculture currently produces sixty million tonnes of fish and shellfish every year. In 2011, aquaculture production overtook wild fisheries for human consumption.

This paradigm shift last occurred in the Neolithic period, ten thousand years ago, when agriculture displaced hunter-gatherers as a source of human food.

Aquaculture is here to stay, and wild fish capture (fishing) will never again exceed cultivation.

Recreational fishing will remain a human activity, just as hunting still is, after ten thousand years - but it won't be a major source of food from the seas.

The best way to preserve wild fish is not to fish them.

Environment Aquaculture Finfish Sustainability

  • 1 year 11 months ago

Clone of FINAL STAGE

ComPAIR Research
Thanks for taking the time to look at my model on how greenhouse effect impacts food security!
Here are a few notes:-For more detailed descriptions of primitives, click on the information ("i") buttons.-You may need to adjust the window size when viewing the graphs-If you want to revisit my graphs after viewing the story, click on the buttons at the bottom of the canvas.-References and links to photos can be found at the end of the story

Sustainability Food Security Greenhouse Effect

  • 2 years 10 months ago

Clone of FINAL STAGE

Pagandai V Pannirselvam
Thanks for taking the time to look at my model on how greenhouse effect impacts food security!
Here are a few notes:-For more detailed descriptions of primitives, click on the information ("i") buttons.-You may need to adjust the window size when viewing the graphs-If you want to revisit my graphs after viewing the story, click on the buttons at the bottom of the canvas.-References and links to photos can be found at the end of the story

Sustainability Food Security Greenhouse Effect

  • 2 years 12 months ago

Oil to Pension Fund Model with Taxation

J K
This is a heavily simplified model of the revenue generated by oil extraction and the pension fund. The oil reserves are a stock already considered in monetary value. Every year part of this stock goes to people working in the oil industry, the shareholders, or directly into the pension fund. Part of the workers' wages go to the pension fund as long as there are wages coming from the oil company. This money flow is stopped once the oil reserves are depleted. The payouts to the shareholders are not taxed, however the wealth of the shareholders is flat-taxed with a fixed percentage. This flow is nicknamed "Tax the Rich".

Sustainability

  • 4 months 2 weeks ago

Clone of CARP - Carp AquacultuRe in Ponds

Igor Sreckovic
This model simulates the growth of carp in an aquaculture pond, both with respect to production and environmental effects.

Both the anabolism and fasting catabolism functions contain elements of allometry, through the m and n exponents that reduce the ration per unit body weight as the animal grows bigger.

The 'S' term provides a growth adjustment with respect to the number of fish, so implicitly adds competition (for food, oxygen, space, etc).

 Carp are mainly cultivated in Asia and Europe, and contribute to the world food supply.

Aquaculture currently produces sixty million tonnes of fish and shellfish every year. In May 2013, aquaculture production overtook wild fisheries for human consumption.

This paradigm shift last occurred in the Neolithic period, ten thousand years ago, when agriculture displaced hunter-gatherers as a source of human food.

Aquaculture is here to stay, and wild fish capture (fishing) will never again exceed cultivation.

Recreational fishing will remain a human activity, just as hunting still is, after ten thousand years - but it won't be a major source of food from the seas.

The best way to preserve wild fish is not to fish them.

Environment Aquaculture Finfish Sustainability

  • 2 years 5 months ago

Clone of CARP - Carp AquacultuRe in Ponds

Pagandai V Pannirselvam
This model simulates the growth of carp in an aquaculture pond, both with respect to production and environmental effects.

Both the anabolism and fasting catabolism functions contain elements of allometry, through the m and n exponents that reduce the ration per unit body weight as the animal grows bigger.

The 'S' term provides a growth adjustment with respect to the number of fish, so implicitly adds competition (for food, oxygen, space, etc).

 Carp are mainly cultivated in Asia and Europe, and contribute to the world food supply.

Aquaculture currently produces sixty million tonnes of fish and shellfish every year. In 2011, aquaculture production overtook wild fisheries for human consumption.

This paradigm shift last occurred in the Neolithic period, ten thousand years ago, when agriculture displaced hunter-gatherers as a source of human food.

Aquaculture is here to stay, and wild fish capture (fishing) will never again exceed cultivation.

Recreational fishing will remain a human activity, just as hunting still is, after ten thousand years - but it won't be a major source of food from the seas.

The best way to preserve wild fish is not to fish them.

Environment Aquaculture Finfish Sustainability

  • 3 years 4 months ago

Clone of FINAL STAGE

Pagandai V Pannirselvam
Thanks for taking the time to look at my model on how greenhouse effect impacts food security!
Here are a few notes:-For more detailed descriptions of primitives, click on the information ("i") buttons.-You may need to adjust the window size when viewing the graphs-If you want to revisit my graphs after viewing the story, click on the buttons at the bottom of the canvas.-References and links to photos can be found at the end of the story

Sustainability Food Security Greenhouse Effect

  • 2 years 12 months ago

Clone of CARP - Carp AquacultuRe in Ponds

Valentin Balseanu
This model simulates the growth of carp in an aquaculture pond, both with respect to production and environmental effects.

Both the anabolism and fasting catabolism functions contain elements of allometry, through the m and n exponents that reduce the ration per unit body weight as the animal grows bigger.

The 'S' term provides a growth adjustment with respect to the number of fish, so implicitly adds competition (for food, oxygen, space, etc).

 Carp are mainly cultivated in Asia and Europe, and contribute to the world food supply.

Aquaculture currently produces sixty million tonnes of fish and shellfish every year. In 2011, aquaculture production overtook wild fisheries for human consumption.

This paradigm shift last occurred in the Neolithic period, ten thousand years ago, when agriculture displaced hunter-gatherers as a source of human food.

Aquaculture is here to stay, and wild fish capture (fishing) will never again exceed cultivation.

Recreational fishing will remain a human activity, just as hunting still is, after ten thousand years - but it won't be a major source of food from the seas.

The best way to preserve wild fish is not to fish them.

Environment Aquaculture Finfish Sustainability

  • 3 years 1 month ago

Clone of FINAL STAGE

Pagandai V Pannirselvam
Thanks for taking the time to look at my model on how greenhouse effect impacts food security!
Here are a few notes:-For more detailed descriptions of primitives, click on the information ("i") buttons.-You may need to adjust the window size when viewing the graphs-If you want to revisit my graphs after viewing the story, click on the buttons at the bottom of the canvas.-References and links to photos can be found at the end of the story

Sustainability Food Security Greenhouse Effect

  • 2 years 12 months ago

Pages