Date: 13/03/2018 13:19:06
From: mollwollfumble
ID: 1198717
Subject: CSIROI
mollwollfumble said:
C’mon, spit it out, man. Spit it out.
Oops. That title was supposed to be “CSIRO Snapshots”.
I get these in my email box, and usually discard them, but you may be interested.
https://events.csiro.au/Newsletters/Snapshot/March-2018
Want a job? How about “Research Director of Nutrition & Health” or “Satellite Operations and Data Manager”. Both jobs are up for grabs this month.
Other topics:
mollwollfumble said:
Say no more!
The total number of adult white sharks across the Australasian region is around 2,210. Of these adults, 1,460 are west of Tasmania and 750 are east of Tasmania, including New Zealand. Numbers are stable “We found that in both populations the adult population trend since protection has been essentially flat, with no evidence for a substantial increase or decrease.”
“Counting fish is like counting trees, but you can’t see them and they move around all the time. Electronic tagging doesn’t tell us about shark numbers.
To address this key problem we worked with colleagues across Australia and New Zealand to use a highly novel method called close-kin mark-recapture, first developed by CSIRO in the late 2000s to monitor southern bluefin tuna.
Close-kin mark-recapture first involves taking a tissue sample from a shark, alive or dead, obtaining a genetic profile of the animal, and then comparing it to all the other sharks and asking: are these sharks related, and if so how are they related?
Due to a number of factors, it is easier to take genetic samples from juvenile white sharks (in the 3.5 to 4 m or less range) than from adults.
Higher numbers of sharks, or sharks with low survival rates, make it less likely to find siblings in the samples. Find enough of these half-siblings, and you can estimate both adult numbers and survival rates.”
> Counting fish is like counting trees, but you can’t see them and they move around all the time.
Makes me wonder about a science experiment like this. Put a blindfolded person in a football field and ask them to count how many other people are on that field. All the other people have been told to slowly and quietly walk predefined routes and not dodge.
The blindfolded person may use any nethod they like to count the others. Eg. Smell and sonar, wind interference.
mollwollfumble said:
- our researchers have used a patented form of the ‘wonder material’ graphene, called GraphAir, as an extraordinarily effective filter that improves water purification
If only it could remove salt too!
mollwollfumble said:
> Counting fish is like counting trees, but you can’t see them and they move around all the time.Makes me wonder about a science experiment like this. Put a blindfolded person in a football field and ask them to count how many other people are on that field. All the other people have been told to slowly and quietly walk predefined routes and not dodge.
The blindfolded person may use any nethod they like to count the others. Eg. Smell and sonar, wind interference.
Can you get them to count off
party_pants said:
mollwollfumble said:
- our researchers have used a patented form of the ‘wonder material’ graphene, called GraphAir, as an extraordinarily effective filter that improves water purification
If only it could remove salt too!
MIT claims that they can process wood to do that.