@mcewanjc

A student of the scientific study of randomness in the biological world

 mosgiel
researchgate.net/profile/John_McEwan
Joined February 2011
  • Tweets1.1K
  • Following242
  • Followers403
154Media
John McEwan retweeted
Aaron Meikle@AaronJMeikleSep 29
Forecast farmgate prices for 3 main beef classes, from @NZBeefLamb's New Season Outlook 26/27. The change in the trend since 24 is marked beeflambnz.com/news/new-seas… Look at Manufacturing go. Reinforcing its a high quality product in its own right (quality being 'fit for purpose')
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John McEwan retweeted
Fish Focus@focus_fishSep 18
BREEDING LEANER SALMON COULD PAY OFF FOR THE INDUSTRY A new study from @nofima shows that #salmon can be bred to use feed more efficiently. Calculations suggest that this could save the Norwegian #salmon industry more than €100 million a year. @UK_NSC fishfocus.co.uk/breeding-lea…

BREEDING LEANER SALMON COULD PAY OFF FOR THE INDUSTRY

Breeding leaner salmon could pay off for the industry. A new study from Nofima shows that salmon can be bred to use feed more efficiently.

fishfocus.co.uk
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Top 10 regions by GDP per capita 1. Southland: $95,061 2. Wellington: $94,438 3. Auckland: $89,521 4. Taranaki: $85,095 5. Marlborough: $83,484 6. Canterbury: $79,852 7. West Coast: $77,650 8. Otago: $76,101 9. Waikato: $72,330 10. Bay of Plenty: $71,343 New Zealand — $81,283
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John McEwan retweeted
Charted Daily
@CharteddailyAug 21
The value of New Zealand's goods exports in the year to July rose 10% year-on-year, driven by continued strength in major primary & resource-based commodities: 🥛🧈🧀 up 5% ($1.2B) 🥩 up 24% ($2.3B) 🥝 up 12% ($0.5B) Gold up 94% ($1.2B) 🍎 up 13% ($0.15B) Aluminium up 41% ($0.6B)
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NZ farmers should ask why NZ has also been silent on this issue of having formal cryogenic storage of key sheep genetics. Perhaps this report by our closest sheep farming neighbor can spur some discussion for NZ? On a more flippant note, we should be chuffed that the picture chosen is a New Zealand sheep with twin lambs! Obviously, NZ genetics is being hankered after by farmers in Australia?
marina@marinarsfortesAug 10
CSIRO report proposed a hybrid livestock gene bank model - Sheep Central sheepcentral.com/unreleased-…

Unreleased CSIRO report proposed a hybrid livestock gene bank model - Sheep Central

A CSIRO report completed four years ago recommended Australia establish a livestock gene bank as insurance against the impact of exotic disease incursions or natural disasters...Read More

sheepcentral.com
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It would be interesting to dig into this further, I suspect construction is a bigger part of the NI economy and that it varies more with economic conditions? There is a deeper story here waiting to be explored.
Charted Daily
@CharteddailyAug 5
No wonder so many people are moving down south.
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Rocketlab has bought Iridium. As a proud Southern man, and having spent many years as a researcher in NZ pastoral agriculture, I suspect this development may have more impact on our future sheep/beef/dairy farming than many now suspect. space.com/space-exploration/…

'The start of a new era': Rocket Lab buying satellite-communications company Iridium for $8 billion

"This is a defining moment for the space industry and the start of a new era of strategic, accelerated growth for Rocket Lab and Iridium."

space.com
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John McEwan retweeted
Lee Hickey@DrHikovJun 28
🌱 Legumes fix nitrogen, reshape the microbiome, and boost the next crop’s yield by ~1 t/ha. We’ve never bred for it. Time to start. Our new preprint makes the case 👇 biorxiv.org/content/10.1101/…
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1878 was the year of the "great flood" where the Mataura and the Clutha rivers both changed course. teara.govt.nz/en/1966/disast… I remember the the January 1984 floods in Southland and the drought in Otago. Both floods were towards the end of a super El Nino period. History never repeats but it can rhyme? Worth a deeper look?
The Washington Post
@washingtonpostMay 8
Chances are rising that an El Niño expected to form soon could become one of the most powerful such events on record, according to new data. El Niño patterns are correlated with food shortages, water impacts and even civil conflict: wapo.st/49yLAQS
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John McEwan retweeted
Aaron Meikle@AaronJMeikleApr 30
Wool chart for today: a happy result again given the time of year and the wool for sale. Maybe the icing sugar will actually turn into icing on the cake for sheep farmers, with wool making a meaningful contribution to bottom lines.
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Interesting post and comments about Australian IMF genetic trends
Tom Bull@LambproHolbrookApr 29
Lamb won’t compete on price with white proteins, it needs to compete on experience. When you look at the maternal genetic trends for IMF it’s concerning where the industry will end up.
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If you are interested in sheep production and genetics facebook.com/share/p/1AVC312…
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John McEwan retweeted
Math Files
@Math_filesMar 5
Fallacious proof that 32.5 = 31.5
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John McEwan retweeted
Burner@BurnerDontaskFeb 13
New Zealand is a Latin American economy that just hasn't realised it yet
Civixplorer
@CivixplorerFeb 6
🐄 Countries with more cows than people.
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John McEwan retweeted
MethaneSAT
@MethaneSATFeb 2
MethaneSAT captured 221 scenes from oil & gas-producing regions around the world covering 50% of global onshore production. Now, our science and analytics teams have synthesized the data to uncover key insights about the global oil and gas system. More 👉 methanesat.org/project-updat…
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The great thing about science is it self corrects. Several years ago researchers noted that after plateauing in the early 2000s atmospheric methane levels were increasing more rapidly, subsequent papers using δ13CCH4 pinned it on an increase in biological sources. This work identifies that the change was a combination increased emissions from wetlands coupled with a decrease in hydroxyl radical concentrations linked to a drop in nitrogen oxide emissions during COVID-19 lockdowns.
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Methane emissions and their mitigation and removal from the atmosphere are a hot topic for NZ farmers grazing ruminants. Hope this paper informs future discussions. Further details available from Ciais, P., Y. Zhu, Y. Cai, X. Lan, S. E. Michel, B. Zheng, Y. Zhao, et al. 2026. “Why Methane Surged in the Atmosphere during the Early 2020s.” Science, February. doi.org/10.1126/science.adx8….

Why methane surged in the atmosphere during the early 2020s

The atmospheric methane (CH4) growth rate surged after 2019, peaking at 16.2 parts per billion per year (ppb year−1) in 2020 before declining to 8.6 ppb year−1 in 2023. Using multiple atmospheric...

science.org
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John McEwan retweeted
Aaron Meikle@AaronJMeikleFeb 2
Time for another interesting chart - where New Zealand is sending its lamb exports From Beef + Lamb New Zealand's 'New Season Outlook 2025/26' beeflambnz.com/knowledge-hub…
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New updates are coming to the €uroStar evaluations, launching this Tuesday 3rd of February. Dr. Thierry Pabiou, geneticist at Sheep Ireland explains the impacts of these updates below👇
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