Plummeting insect numbers threaten collapse of nature
08-29-2019, 12:13 PM
Post: #57
 Pjwum Member Posts: 58 Joined: Jan 2018
RE: Plummeting insect numbers threaten collapse of nature
Thanks to Monsanto paying high interest on their bonds I was able to acquire a mint HP-32E this week (10 EUR). This basic Spice model has no programming capabilities but it is predestined to study changes in insects populations of your area:

1. Standard method, only basic functions needed (but could harm insects and affect your result)
- catch a good amount of an insect species in your area, mark and release them (m)
- wait a few days for them to mix with the rest of the population
- catch a good amount of the insect species in your area (n)
- count the marked and recatched specimen (r)
- your population p is p = m*n/r

2. Read somewhere in the Internet, uses regression analysis (but could harm trees)
- count number of insects on a medium sized tree branch (i)
- count the tree branches of the tree crown
- meisure the circumference of the trunk (t)
- repeat the branch count and the trunk measurement on a good amount of trees (b)
- construct a regression model for crown size depending on trunk circumference (this relation should be in fact linear and an HP-32E will suffice, it's an awful lot of typing though)
- your population p is p = sum (all trees in your forest, i*b(t))

Cheers
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 Messages In This Thread Plummeting insect numbers threaten collapse of nature - Dan - 02-23-2019, 07:47 AM RE: Plummeting insect numbers threaten collapse of nature - pier4r - 02-23-2019, 01:30 PM RE: Plummeting insect numbers threaten collapse of nature - KeithB - 02-23-2019, 02:37 PM RE: Plummeting insect numbers threaten collapse of nature - mfleming - 02-23-2019, 04:35 PM RE: Plummeting insect numbers threaten collapse of nature - Joe Horn - 02-23-2019, 04:36 PM RE: Plummeting insect numbers threaten collapse of nature - Dieter - 02-23-2019, 07:41 PM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 02-23-2019, 09:34 PM RE: Plummeting insect numbers threaten collapse of nature - Joe Horn - 02-24-2019, 08:17 AM RE: Plummeting insect numbers threaten collapse of nature - Maximilian Hohmann - 02-24-2019, 11:11 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 03-02-2019, 08:42 AM RE: Plummeting insect numbers threaten collapse of nature - Thomas Klemm - 02-23-2019, 05:53 PM RE: Plummeting insect numbers threaten collapse of nature - Gerson W. Barbosa - 03-06-2019, 11:45 AM RE: Plummeting insect numbers threaten collapse of nature - Gene - 02-23-2019, 11:06 PM RE: Plummeting insect numbers threaten collapse of nature - mfleming - 02-24-2019, 01:33 AM RE: Plummeting insect numbers threaten collapse of nature - pier4r - 02-24-2019, 02:58 PM RE: Plummeting insect numbers threaten collapse of nature - BruceH - 11-03-2019, 04:43 PM RE: Plummeting insect numbers threaten collapse of nature - HP67 - 02-24-2019, 05:20 PM RE: Plummeting insect numbers threaten collapse of nature - Dave Britten - 03-06-2019, 05:44 PM RE: Plummeting insect numbers threaten collapse of nature - mfleming - 03-07-2019, 06:10 AM RE: Plummeting insect numbers threaten collapse of nature - rncgray - 03-07-2019, 08:15 AM RE: Plummeting insect numbers threaten collapse of nature - burkhard - 03-07-2019, 09:47 PM RE: Plummeting insect numbers threaten collapse of nature - Dan - 03-08-2019, 04:20 AM RE: Plummeting insect numbers threaten collapse of nature - Maximilian Hohmann - 03-08-2019, 12:49 PM RE: Plummeting insect numbers threaten collapse of nature - Massimo Gnerucci - 03-08-2019, 04:05 PM RE: Plummeting insect numbers threaten collapse of nature - Dan - 03-11-2019, 10:30 AM RE: Plummeting insect numbers threaten collapse of nature - Massimo Gnerucci - 03-11-2019, 10:41 AM RE: Plummeting insect numbers threaten collapse of nature - Csaba Tizedes - 03-12-2019, 05:02 PM RE: Plummeting insect numbers threaten collapse of nature - Dave Britten - 03-08-2019, 01:47 AM RE: Plummeting insect numbers threaten collapse of nature - Dave Britten - 03-08-2019, 02:23 PM RE: Plummeting insect numbers threaten collapse of nature - Dan - 03-31-2019, 07:06 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 05-07-2019, 09:09 AM RE: Plummeting insect numbers threaten collapse of nature - Joe Horn - 05-07-2019, 05:05 PM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-07-2019, 05:41 PM RE: Plummeting insect numbers threaten collapse of nature - Joe Horn - 05-08-2019, 12:21 AM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-08-2019, 12:46 AM RE: Plummeting insect numbers threaten collapse of nature - Joe Horn - 05-08-2019, 02:02 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 05-09-2019, 05:13 AM RE: Plummeting insect numbers threaten collapse of nature - Archilog - 05-09-2019, 12:54 PM RE: Plummeting insect numbers threaten collapse of nature - pier4r - 05-09-2019, 07:04 PM RE: Plummeting insect numbers threaten collapse of nature - SlideRule - 05-08-2019, 11:33 AM RE: Plummeting insect numbers threaten collapse of nature - SlideRule - 05-10-2019, 12:04 AM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-10-2019, 12:08 AM RE: Plummeting insect numbers threaten collapse of nature - SlideRule - 05-10-2019, 12:25 AM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-10-2019, 12:31 AM RE: Plummeting insect numbers threaten collapse of nature - ijabbott - 05-10-2019, 07:02 PM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-10-2019, 07:56 PM RE: Plummeting insect numbers threaten collapse of nature - ijabbott - 05-10-2019, 08:41 PM RE: Plummeting insect numbers threaten collapse of nature - Thomas Okken - 05-10-2019, 09:41 PM RE: Plummeting insect numbers threaten collapse of nature - burkhard - 05-10-2019, 11:41 PM RE: Plummeting insect numbers threaten collapse of nature - jebem - 05-11-2019, 06:11 PM RE: Plummeting insect numbers threaten collapse of nature - ijabbott - 05-11-2019, 12:17 PM RE: Plummeting insect numbers threaten collapse of nature - burkhard - 05-12-2019, 01:39 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 08-08-2019, 01:53 AM RE: Plummeting insect numbers threaten collapse of nature - toml_12953 - 08-08-2019, 06:40 AM RE: Plummeting insect numbers threaten collapse of nature - jlind - 08-12-2019, 04:59 PM RE: Plummeting insect numbers threaten collapse of nature - Pjwum - 08-13-2019, 07:42 PM RE: Plummeting insect numbers threaten collapse of nature - Dan - 08-27-2019, 07:37 AM RE: Plummeting insect numbers threaten collapse of nature - ijabbott - 08-31-2019, 07:22 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 08-31-2019, 09:56 AM RE: Plummeting insect numbers threaten collapse of nature - ijabbott - 08-31-2019, 01:57 PM RE: Plummeting insect numbers threaten collapse of nature - Dan - 09-05-2019, 03:14 AM RE: Plummeting insect numbers threaten collapse of nature - toml_12953 - 09-05-2019, 10:52 AM RE: Plummeting insect numbers threaten collapse of nature - Albert Chan - 09-05-2019, 11:08 AM RE: Plummeting insect numbers threaten collapse of nature - Dan - 09-06-2019, 02:56 AM RE: Plummeting insect numbers threaten collapse of nature - Pjwum - 08-29-2019 12:13 PM RE: Plummeting insect numbers threaten collapse of nature - mfleming - 08-29-2019, 02:28 PM RE: Plummeting insect numbers threaten collapse of nature - rncgray - 10-31-2019, 10:21 AM

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