Showing posts with label New Zealand farming. Show all posts
Showing posts with label New Zealand farming. Show all posts

February 3, 2016

New Zealand farming. Pigs – Glossary of terms


Dr Clive Dalton


 Baconer: Pig slaughtered around 80kg live weight (60kg carcass weight) to produce bacon and ham.

Barrow:  A castrated male pig. Mainly an American term.

Boar:  Uncastrated male used for breeding but can be used for younger pigs.

Breeds:
·      Large white
·      Landrace
·      Berkshire
·      Welsh
·      Hampshire
·      Tamworth
·      Wessex saddleback
·      Large black
·      Hybrids from commercial breeding companies
·      Kunikuni Maori native pig
·      Feral pigs
Modern hybrid gilts of Large White and Landrace cross


 Farrowing: Process of giving birth to a litter.

Farrowing pen or crate:  Confined area where sows is held while farrowing or suckling piglets in first few weeks.


Sow confined in farrowing pen to allow piglets to suckle without being overlain.

 Farrowing index:  Average number of litters of piglets a sow produces in a year.


Sow and litter in farrowing pen given more space to stand up and move around.

Gilt: Female pig of any age from birth to having her first litter.

Hog:  General term (mainly American) for young pig.

Litter: All the piglets produced by a sow at one birth.

Porker: Pig slaughtered at about 50kg liveweight (40kg carcass weight) for fresh meat (pork).

Runt: Small poorly developed piglet in a litter.

Sow: Female kept for breeding which has had at least one litter.

Sucker:  Young pig of either sex still, sucking its dam.

Super porker:  Pig of bacon weight killed for trimmed pork cuts.

Tassels:  Seen on some feral pigs, e.g. NZ Kunikuni.

Tassle on Kunikuni pig's jowl

 Weaner:  Pig removed from suckling its mother from 3 weeks (early weaning) to 8-10 weeks (conventional weaning).

Large black 8-week old weaners

August 26, 2014

Agricultural history in New Zealand. Herd testers. Joan Bentley

By Dr Clive Dalton

 
Joan Bentley was born in Ireland and worked for the President of the Irish Jersey Breeders Association, who got a lot of information from New Zealand about Jersey cattle. 

This encouraged Joan’s interest in Jerseys, and New Zealand.

2012  New Zealand Jersey herd of 400 cows, five times the average herd size in the 1960s



In 1965 she saw an advert in the Irish Farmer’s Weekly for herd testers in New Zealand, so got all the necessary forms and applied. One of the big attractions of the job was that men and women were paid the same pay rate, which was not the norm in Ireland.

She had an interview in Belfast and after the necessary health checks, she was accepted as a ‘ten pound pom’ and on her way to New Zealand aged 24 from Tilbury docks in London on the NZ Shipping Company ‘Rangitoto’, leaving on 26 May 1965.


SS Rangitoto (photo Internet)
 Joan said the ship had a couple of breakdowns due to her age, needing engineers to fly out to Panama.  So it was not a rushed trip and she remembers a wonderful five weeks at sea with 36 other future herd testers and many other young folk on board.  They had memorable stops at the Azores, Panama through the canal and Tahiti, where she vividly remembers the lush vegetation after many days at sea. She said the voyage was a time of rest and relaxation - and putting on weight, arriving Wellington on 26 June 1965.


The Rarimu railway spiral from the air

After arrival, the group of herd tester recruits boarded the ‘limited overnight express’ train bound for Frankton Junction.   

She remember stopping on the top of the Rarimu spiral in the middle of the night, opening the windows, seeing the stars and feeling the cold King Country winter air flowing in.

She remembers it being equally cold on arrival at Frankton Junction at 6am.  



AHIA office briefing
Scotsman Bill Calder met the group at Frankton where accommodation had been arranged at the Riverlea Hotel at the south end of Victoria Street in Hamilton.  They then spent two days at the Head Office of the Auckland Herd Improvement Association (AHIA) in London Street, with the manager Selwyn Sheaf and Ken Stone who was responsible for training.  Joan found them very nice people and very welcoming.

The former head office of the Auckland Herd Improvement Association in London Street, Hamilton.  This 2014 photo shows a different business to keeping pedigree and production records from dairy cows in the 1960s.
 Joan remembers being lectured on the important issue of herd testing etiquette, of never  carrying information on herd tests results, or gossip, from one farm to another, as many folk were related and this could cause all sorts of problems. They had to be friendly but professional at all times.

To Karaka
To start her herd-testing round, Joan was sent to Karaka where she had three weeks training with another herd tester, Charlie Leimweber – who Joan remembers was a constant student of ‘Best Bets’ horse racing guide.  New Zealand was a great experience for her being intrigued to see lemons growing on trees, and to confront her first dead possum!

Joan found the people on farms were all very friendly, and they were always interested in Ireland and what was going on in other places.  So there was no lack of conversation in the evenings, as Television was just coming in at the time, with radio being the main form of communication, especially in the cowshed.

Move to Waitoa
After Karaka, Joan was sent to Waitoa near Te Aroha to a round of monthly testing on 25 farms, where herds were increasing in size up to 120 cows by then, and everyone worked hard. 

Simca (photo Internet)

Herd testing was noisy heavy work with full pails of milk having to be lifted on to spring balances to record weight. 
 Horses and carts for herd testers had slipped into history by this time, and Joan got an interest-free load to buy an old Simca car and trailer to transport all her testing gear from farm to farm. 
Testers who had horses were not sorry to see them go, especially as those in the Waikato were all ex pacers ensuring that the cart and its contents had a steady swaying gait.
  
 The gear included the centrifuge for spinning the butyrometer tubes, containers for Sulphuric acid and amyl alcohol, 20 sets of milk meters and sample bottles. All these bottles needed washing, and the in hot water needed could cause a problem for the farmer as it took away water he needed.

Move to Te Kowhai
After two months at Waitoa, Joan was sent to Te Kowhai, which was the first area to trial the Trutest milk meter, which saved all the hard work of physically weighing milk.  Bill Calder designed all the equipment needed for these major changes to improve herd testing.

Herringbone sheds were starting to appear in great numbers, but Joan said that sheds converted from the standard walk-throughs to herringbones, had major problems with bottlenecks when cows were released.  So this encouraged farmers to come up with solutions from which all farmers benefited.

Testing tricks
Some farmers saw the monthly visit of the herd tester as a nuisance, as it upset their regular routines.  But the majority realised the importance of testing, and some were even up to tricks to get a good test to boost their herd, like putting weights on cup claws to draw out the last drops of milk, which were always higher in fat content, and stripping the cow (sometimes twice) after the cups had come off.  Putting the cows in a good paddock or feeding meal before the test was another common trick, especially in pedigree herds selling bulls.

Network of friends
A photo of the four women herd testers (at right) and two men with their horse transport.  They all met once a year at the Herd Testers conference and Ball. They  loved their horses most of the time - but were not sorry to see them go for a faster mode of transport.
 Joan said she made a lasting network of friends through herd testing, both male and female.  In the early days she remembers some wives were suspicious of women herd testers in the milking shed alone with their husbands, while they were in the house preparing meals.  Joan remembers informing  one suspicious wife that her husband’s looks ensured he was totally safe from the attentions of any  women herd testers! 

Joan looks back on her herd testing days with fond memories and after herd testing for four years at Te Kowhai, Joan married, and she and her husband went farming on their own account in the area.   She now breeds shorthorn cows on her small block in Te Kowhai.

Retirement
After her husband's death, she worked as a technician in the Horticulture Department at the Waikato Polytech, after which she has had a long and happy retirement on a small block in Te Kowhai with partner Brian Saunders. She has Shorthorn cattle and prize-winning poultry - and dogs!
Photo below shows her with doggy friend who she entertains on a Monday each week. 


Joan with friend's Great Dane and her own two Australian terriers May 2018



April 23, 2014

New Zealand agricultural history. No 2. Importing exotic sheep breeds


Scrapie in UK
Cause of Scrapie
Scrapie history in New Zealand

By Dr Clive Dalton

Scrapie was a major importation risk and this certainly worried a lot of people both in New Zealand and in UK.  

Scrapie in UK
Scrapie is endemic in UK, and we budding young shepherds used to see what must have been the disease in Cheviots and Scottish Blackface sheep on my native Scottish Border. Sick sheep used to act a ‘bit daft’ and scrape their wool off by rubbing against stonewalls and fences – hence the name. but no farmer would ever have dreamed of getting a vet to look at a sheep – they would have cost money!  Scrapie wasn’t common in UK, but it has a fearsome reputation for countries like New Zealand that want to claim a ‘clean health’ status, especially for exporting animals. 

(See Wikipedia for full details of Scrapie).

In the UK in recent years a testing programme was undertaken to eliminate Scrapie from the Swaledale breed, so it must have been serious enough to go to all the work and cost involved. 

 In the past, it was not easy to diagnose, as it required slaughter and examination of brain tissue. Brains are still examined today but there are now other fancy DNA diagnostic tools that can be used.

 Picture shows Swaledale ewes in their native Swale dale in Yorkshire, England

Cause of Scrapie
The organism causing Scrapie is a prion, which is a protein, and is most commonly spread from ewe to lamb at birth in all the birth fluids and close contact although a lot of this is still a mystery.  A prion has no DNA and multiplies by simply duplicating itself like the growth of a crystal.

The problem with Scrapie is that it develops slowly and is usually only seen in sheep around 3-5 years of age. So this is the challenge for quarantine which consequently has to go on for years, and greatly increases the cost of importations and especially if in the end, animals have to be slaughtered.

So nobody would risk buying sheep (or goats which can also carry Scrapie) from New Zealand if it was ever shown to become endemic here.

It’s always easy to show that a country has a disease; the hard part is proving that it has been eliminated with a high level of guarantee.  New Zealand’s trading competitors love this and just keep on demanding more data before they will relax their import regulations for New Zealand produce.  We live with this as a daily threat.

Scrapie history in New Zealand

This photo tells a bit of important history in the study of Scrapie.  

Dr R.H. Kimberlin who is the world authority on such diseases visited New Zealand and Alan spent time with him.  He was a valuable resource to check diagnostic criteria on such diseases.

Kimberlin edited the 'bible' on the subject. See reference below:
'Slow virus diseases of animals and man'.  New Holland Research Monograph, Volume 44.

Photo:  Dr Kimberin standing, Alan Julian at microscope.  Photo by Alan Julian


Veterinary pathologist Alan Julian gave a paper in 1996 to a workshop in Australia on a range of nasties called ‘spongiform encephalopathies’ in domestic animals where he reported the Scrapie saga in New Zealand.  Here are the key points:
  •  Scrapie was diagnosed for the first time in New Zealand in June 1952 in two Suffolk sheep in Canterbury imported from England in 1950.
  • Farm was quarantined and all sheep on property were destroyed.
  • All sheep sold from this property in the previous 3 years (a total of 225) were traced. (Presumably they were sent to the meat works).  
  • The farm was restocked 4 weeks after slaughter. 
  • Control measures were not effective as in 1954 an outbreak in Southland in a South Suffolk ewe was traced back to the Canterbury property.
  •   Control measures for this outbreak involved 191 properties, with the slaughter and burial of 4,399 sheep. (Presumed they were sent to the meat works).  
  • The farms had restrictions put on them for 3 years during which time all sheep sold from the properties had to go direct to slaughter. 

 
No other outbreaks were ever recorded so New Zealand was declared Scrapie free.  This saga was well documented and used for veterinary teaching, and it made the profession very determined never to allow it into NZ again!

Picture of Suffolk sheep - the breed that brought the Scrapie to New Zealand from England in 1950.

New Zealand agricultural history. No 3. Importing exotic sheep breeds.

Pressure for importation
Chance of a fast buck
 
By Dr Clive Dalton

When the pressure came on in the 1970s to import more sheep from UK, the memory of the 1952 Scrapie saga was still sufficiently fresh in the memory of a lot of folk to make them very nervous. 

 
Dr Sam Jamieson. Photo: National Archives
So t
here was a clear acceptance by all in 1972 that any importation of sheep from UK and Ireland had to be done right first time, which meant massive veterinary control of the exercise. 

At that time, MAF certainly had the right man to oversee this – Sam Jamieson. Sam left his native Scotland for New Zealand at some stage, to become one of the two MAF Wanganui Vets. The Wanganui district included, Ohakune, Taihape, Marton and Flock House, a large area. It boarded on to Hawkes Bay and Taupo. 

He then rose to be Chief Veterinary Officer (CVO) and Director of Animal Health in  Wellington Head Office, where he chaired the MSQAC (Maximum Security Quarantine Advisory Committee) set up to oversee all details of sheep importations. 

Sam made no secret of the fact that he was very much against any sheep importation, so consequently many in the Research Division saw him as a nit-picking, pontificating old Scot - or worse! Thankfully for New Zealand he was, as there was much at stake and no room to cut corners just to keep researchers happy. Sam has long gone but his concerns proved to be right.



Dr Neil Bruere of Massey University Vet School was another exotic disease expert very concerned about risks to the sheep industry if Scrapie got back into the country with the imported exotic sheep. 
  
Many geneticists saw Neil as another stumbling block in the way of sheep importations. 

Emeritus Professor Neil Bruere.
Photo: Words and Pictures


Neil's views against any importations, even from UK flocks with so-called 'Scrapie-free certificates', got a lot of coverage in the farming press at the time which got farmers attention – as in those days there were specialist agricultural journalists and editors of farming papers and journals who understood the risks that disease entry would have to our marketing reputation – and could write informed comment about it.  They did a great job and we’d be struggling to find such like today!

The Director of Agricultural Research at the time was Dr Lindsay Wallace who was one of Ruakura’s most famous scientists on a par with CP McMeekan, so it would have been interesting to have been a fly on the wall when Jamieson and Wallace were debating the importation proposals and protocols required. 

 Lyn Wallace was one of nature’s gentlemen and always came over as being very informed, and always commanded great respect from those of us on his staff for his logical approach to issues.  He must have won the day with Jamieson as the job went ahead.

Photo Dr L.R. Wallace. 
Photo taken by MAF Ruakura's long-serving photographer, the late Don 'whiskers' McQueen, who worked with equal skill  in both laboratory and field. Don was a legend! Photo AgResearch archives.

Chance of a fast buck
It must also be said that without a doubt, there were more than a few folk at the time with an eye to a fast buck, and who saw these new breeds not just as a boost to sheep production in New Zealand, but as a means of getting in early when supply was short and demand high – building up the hype, and then getting out fast after making a killing before demand and prices dropped.

There was plenty of evidence of this human frailty in New Zealand before and after the exotic sheep saga with the import of other so-called ‘exotic’ cattle breeds from UK, Europe in the late 1960s, the USA and Japan later. 

Add to this list Angora rabbits (pictured), Angora goats for mohair, Boar goats for meat, fitches/ferrets for fur, alpacas and llamas for fibre and as companion animals, and even water buffalo for milk.  

But where are they all now? If they can be found, none of them are part of a thriving export industry.  But at the time – we were all led to believe that they were going to be the ‘bees knees’ in terms of cashing in big time.

New Zealand agricultural history. No 14. Importing exotic sheep


The Danish Texels  - what happened to them?

 By Dr Clive Dalton

Texels were in great demand by other sheep countries around the world in the 1970s -1980s once the news got out about their meat qualities, and it seems that the Danish Texels had a top reputation. 

Dr Leyden Baker (pictured right) who had the responsibility to source the Finn, Texel and Oxford Down breeds in Denmark and Finland for the NZ MAF second importation (via embryos and semen), tells what happened when the NZ team were finished with the sheep.

Sheep when ET programme finished
When the NZ team were finished doing ET on the sheep they purchased to harvest embryos, they couldn’t bring them to New Zealand, so they offered to return each ewe to their former owners, free of charge and in mint condition except for a scar on their bellies. 

As far as Leyden knew, the owners were not overly concerned about what had gone on inside the sheep, or the indignity of having been operated on.  No owner made any comment to either Leyden or Dr Robin Tervit who did the Embryo Transfer work.

Dr Peter O'hara
 This information is important, as with the later importations from the same sources, MAF's Chief Veterinary Officer Dr Peter O'Hara  said that the owners did voice concern, leading to MAF allowing more live animals into New Zealand to prevent surgery on them, provided they were slaughtered immediately after their time in quarantine.

Neither Leyden Baker nor Robin Tervit who had both worked closely with the breeders had heard of any dissatisfaction from owners of the sheep over this issue, so it makes you wonder how the complaint got back to Wellington and the CVO. 
 
American interest in Texels
Leyden had a good contact with his friend Dr Gordon Dickerson from Clay Centre Nebraska who he had worked with, and who had done a sabbatical at Ruakura Genetics.  Dickerson was one of the world’s pioneer geneticists who somehow had got wind of what Leyden had been doing, and that there could be a few spare Texels around that Leyden had already sorted out.  

 Dickerson came up with some nice US greenbacks and the deal was done to buy the Texels from the Danes. Leyden thought this was a great idea, as he knew the Clay Center folk had been watching what the Texel was doing in Canada and wanted a piece of the action.

Dual honour
So Leyden Baker says he can now claim the unrecognised honour of being the first person to introduce Texel sheep to both the USA and New Zealand!

 Animal Enterprises looking for sheep
The other point worth noting was the way that Animal Enterprises were able to benefit from Leyden’s leg-work in locating flocks in Denmark and Finland, and building on the good NZ public relations to buy sheep from 70% of the same flocks that MAFTech did for their importation.  That was a very smart move  but all above board!


New Zealand agricultural history. No 16. Importing exotic sheep breeds

 
Importation of exotic sheep breeds
Second MAF importation
Quarantine station at Hopuhopu
Veterinary inspection
MAFQual veterinarian Peter Hoyle

 Dr Clive Dalton

Hopuhopu quarantine station
Hamilton MAFQual veterinarian Peter Hoyle’s  memories



 I was new boy on the block and had some experience in quarantine while working in the UK as a state veterinarian. So I got the job nobody else wanted, to provide veterinary supervision of the Hopuhopu quarantine station for the sheep imported from Finland and Denmark as embryos. 

With members of the Ruakura Genetics team, we thrashed out some rules of procedure and structural requirements to ensure a credible disease confinement programme. 
Photo: Peter Hoyle, happily retired in Vanuatu 2014 where there is no sheep.  Local dogs cleaned up the last few!

The Hopuhopu property owned by Tainui was known to be infected with Ovine Johne’s Disease (OJD), and we devised a programme to attempt to clear infection ahead of the imported animals arrival, as we needed to import local sheep onto the station to be embryo recipients during the intensive multiplication phase.   So another programme was devised to try to avoid importing OJD with these Romney recipient ewes.

MAFTech technical officer Ian Malthus, rattling the feed bucket 
to move the sheep at Hopuhopu


The imported purebred exotic breed sheep arrived as weaners from Somes Island and had never been out of doors.  They were accustomed to being hand fed so the easiest way to get them to go places was to walk in front and rattle a bucket. They had never seen a dog before, and the first dog they met got a very thorough physical going over by them - much to the dog’s embarrassment and disgust.

Duties
  • My duties involved regular visits for the following jobs: 
  • For animal health and examination of sick and dead animals.   
  •  For veterinary oversight of the embryo transfers done at the multiplication stage in the Hopuhopu woolshed surgery.
  • To advise on routine disease control measures.
  • To advise on quarantine procedures.
  • In the final stages, to supervise the post mortem examination of the entire original imported purebreds at the Ruakura Abattoir.  Here we found that all our efforts to eliminate OJD had failed, but there was no evidence of Scrapie from examination of brain tissue.
 
Peter Hoyle providing post-operative care to sheep after Embryo Transfer.  21 March 1986.  Photo by Jaap Jasperse, NZ Farmer magazine






I remember one incident when I arrived on the station and found a ewe acting very strangely and making me suspect that it could be Scrapie.  To my relief, I found that she had been overdosed with oestrogen, which explained her odd behavior. Finding scrapie at that stage would have been the mother and father of all disasters!

Alan Julian
With another sick sheep, specialist veterinary pathologist Alain Julian then at the Ruakura Animal Health Lab diagnosed a rare genetic kidney disease (Mesangiocapillary Glomerulonephritis) from samples I submitted taken from a Finn lamb. 

Alan sent sections of the kidney to Dr Dick Barlow in Scotland and they confirmed the disease.  The good news was that it was not Scrapie!  
 
We also had problems with Necrotic Laryngitis in the Texels at Hopuhopu. This can be nasty and lead to death by suffocation.  It is also called 'chronic ovine laryngitis' caused by a bacterium with the monika of 'Fusobacterium necrophorum'

Other breeds of sheep can get this too.  Feeding too much dry feed can bring it on - and the sheep were fed plenty of that on the station to keep them growing.


Photos from  Hopuhopu  provided by Mike Wolland, Technical Officer at Hopuhopu


One of the many ammunition bunkers on the Hopuhopu army training area.



Truck washing  after sheep arrived from Soames Island maximum quarantine station

 
Hopuhopu quarantine station needed facilities for handling sheep and wool and doing surgery. 

 
MAF Technicians Graham Hasard (left) and Mike Wolland preparing recipient ewes for embryo transfer.  Photo by Jaap Jasperse of NZ Farmer, 21 March, 1986.



 
Operating on embryo recipients in Hophopu woolshed surgery.  Photo by Jaap Jasperse of NZ Farmer, 21 March, 1986.

 
Mike Wolland and Texel ram at Hopuhopu quarantine station


 Farmer reactions to the Texels
But my most telling memory was the reaction of  visiting sheep farmers, in particular the Perendale breeders when the saw the Texels for the first time. In no time they were queuing up to put their names down to purchase some when quarantine was finalised. They probably recognised the Cheviot in the Texel which was also part of the Perendale too, so thought there would be good ‘nicking’ among the genes of the two breeds.

Quality Texel rams that every farmer wanted, especially Perendale breeders.