scholarly journals Possibilities of developing sheep which suckle from several teats

1988 ◽  
Vol 60 (6) ◽  
pp. 608-619
Author(s):  
K. Maijala ◽  
B. Kyle
Keyword(s):  
New Zealand ◽  
Field Data ◽  
Average Distance ◽  
Success Rates ◽  
Systematic Experiment ◽  
Teat Number ◽  
Selection For ◽  
Finnish Study ◽  
Made In ◽  
Daily Milk

Because of the increasing need for ewes which can rear more than two lambs adequately and without shepherding, studies were made in Finland (F), New Zealand (N. Z.) and Ireland on criteria relating the development of such ewes. The Finnish study was based on small trials in 1963—66 and in 1985—88 and on field data from the 1980’s. Data of Vainikainen (1945) was also used. In N.Z., a more systematic experiment has been carried out since 1984, while in Ireland a small study of teat parameters was made in 1985. The frequency of ewes with supernumerary teats (ST) in Finnsheep and Coopworth was ca. 20 %. The frequency of six-teated animals increased with selection for teat number. In Finland, about ½ of the 4-teated ewes had milk-yielding STs. Six-teated ewes in N.Z. gave 30—40 % of their daily milk from the STs. The N.Z. Coopworths seemed to have a »multiple lamb image»; multiple lambs tended to be closely bonded and sucked together, leading to higher success rates than when sucking individually. Heritability of teat number in N.Z. was 0.6. The lengths of STs were more variable than those of main teats, and their mean length ca. half of that of main teats. The average distance of STs from the main teats in Finnish trials was ca. 20 mm (range 1—50mm); the length and separation of teat pairs were correlated, although this was not the case in several flocks studied in Ireland.

Parameterization of Directional Spectra and Its Influence on Ship Motion Predictions

1993 ◽  
Vol 37 (02) ◽  
pp. 138-147
Author(s):  
Ross Graham ◽  
Barbara-Ann Juszko
Keyword(s):  
Spectral Data ◽  
Field Data ◽  
Ship Motion ◽  
Flight Operations ◽  
Modeling Accuracy ◽  
Directional Wave ◽  
Made In

An approach to parameterizing directional spectra proposed by Hogben & Cobb based on a combination of the Ochi & Hubble 6-parameter spectrum and the Longuet-Higgins et al cos2p model is adopted for a study of directional parameterizations and their influence on ship motion predictions. Two schemes for evaluating the directional spreading parameters are assessed in terms of their ability to reproduce highly resolved measured directional spectra, and the best approach, termed the 10-parameter spectrum, is adopted. The applicability of the 10-parameter spectrum to hindcast spectra is investigated, and acceptable fits obtained for 93% of the spectra considered. An evaluation of the ability of the hindcast model to reproduce the measured spectral data is also made. In general, it is found that the differences between the hindcast spectra and associated 10-parameter fits are significantly smaller than the differences between the hindcast spectra and the field data, and it is concluded that the 10-parameter spectrum is a suitable basis for developing statistical descriptions of directional wave climates. The effects of directional parameterization on ship motion predictions are investigated by computing the ship responses as a function of heading for sample hindcast spectra, and the associated 10-parameter and Bretschneider 2-parameter spectra. The responses calculated using the 10-parameter spectrum are found to be in better agreement with the hindcast results than those obtained with the Bretschneider 2-parameter spectrum, with a significant improvement in modeling accuracy in the case of bi-modal spectra. The potential advantages of incorporating the 10-parameter spectrum in future operability analyses of flight operations is examined by comparing the head-to-wind roll response computed using hindcast spectra with that predicted using 10-parameter and Bretschneider spectra.

On the Early Cambrian age of two late orogenic granites from. west-central Ahaggar (Algerian Sahara)

1969 ◽  
Vol 6 (1) ◽  
pp. 25-37 ◽  
Author(s):  
J. Boissonnas ◽  
S. Borsi ◽  
G. Ferrara ◽  
J. Fabre ◽  
J. Fabries ◽  
...  
Keyword(s):  
Random Sampling ◽  
Field Data ◽  
Large Scale ◽  
Early Cambrian ◽  
Basement Complex ◽  
West Central ◽  
Algerian Sahara ◽  
Igneous Activity ◽  
Made In

The Pharusian belt of west-central Ahaggar belongs to the 'basement complex' underlying the Paleozoic and later sediments of the Sahara. This paper reports and discusses the Rb–Sr ages obtained on total rocks and minerals from two granitic stocks of the belt: the Tioueiine and Iskel intrusions.Both plutons gave good whole-rock isochrons, which show that the systems were closed 560 ± 40 m.y. ago with respect to Rb and Sr. This is, most probably, the age of crystallization. Three of the four values obtained on biotites are somewhat lower and scattered in the range 502–526 m.y. The discrepancies are probably due to deuteric reactions or incipient weathering. They can be ascribed neither to the loss of 87Sr during the cooling down of the granites, nor to rejuvenation by some later thermal or tectonic event.These studies confirm previous results of random sampling in Ahaggar and prove that large-scale igneous activity took place during the Early Cambrian Epoch. Knowing from field data that the Tioueiine and Iskel are late orogenic granites, it must be concluded that the Pharusian orogeny came to an end at that time.Such a result contradicts early assumptions, made in the field, of a middle Precambrian age for the Pharusian orogeny. It gives further weight to modern ideas concerning the 700–500 m.y. events in Africa, and it leaves time for erosion to create the Saharian platform before the deposition of the first Paleozoic sandstones.

Should immunocontraception be used for wildlife population management?

2004 ◽  
Vol 26 (1) ◽  
pp. 61 ◽  
Author(s):  
DW Cooper
Keyword(s):  
Immune Response ◽  
New Zealand ◽  
Immune Responses ◽  
Fundamental Problem ◽  
Public Perceptions ◽  
Published Data ◽  
Red Foxes ◽  
European Rabbits ◽  
Selection For ◽  
Self Antigens

Immunocontraception involves eliciting an immune response against eggs, sperm or hormones so that successful reproduction is prevented. Work in Australasia is aimed at European rabbits (Oryctolagus cuniculus), red foxes (Vulpes vulpes), house mice (Mus musculus), common brushtail possums (Trichosurus vulpecula), koalas (Phascolartcos cinereus) and kangaroos (Macropus spp.), with the vaccines involved all containing self antigens or their relatives. Two fundamental problems have been inadequately addressed in this research. The first problem is that it is difficult to obtain strong immune responses against self antigens and so the vaccines may be ineffective. Most published data on the effect of immunocontraceptives on reproduction involve the use of an adjuvant of which there are many kinds. The materials enhance the immune response greatly. The most frequently used is Freund?s adjuvant which can cause chronic suffering. Its use on wildlife will lead to very negative public perceptions. There has been no convincing demonstration that successful immunocontraception is possible with any method of vaccination likely to be used in the field, if success is defined as contraception of a proportion of the population high enough for management requirements. If it is assumed that success can be achieved, the second fundamental problem arises with two potential consequences. Even with adjuvant, a substantial minority of the vaccinated animals remains fertile. The first consequence is that since failure to be contracepted is likely to be in part genetic, there is likely to be rapid selection for these non-responders. The method will become ineffective in a few generations. The second problem is that the offspring of the animals which breed will have altered immune responses. Their capacities to respond to their own pathogens or to harbor pathogens of other species in the same ecosystem are likely to be changed. The presence of chlamydia in P. cinereus and bovine tuberculosis in New Zealand T. vulpecula means that responses to these pathogens would have to be studied in offspring of immunocontracepted parents to ensure that the offspring were not more susceptible to them. New Zealand intentions to put an immunocontraceptive into a T. vulpecula gut worm must be viewed with caution by Australia. The eggs of transgenic worms will be easily transplanted either accidentally or deliberately back into Australia, and so infect T. vulpecula in Australia.

scholarly journals Research Into Labour, Employment and Work in New Zealand: An Overview

1996 ◽  
Author(s):  
Philip Morrison
Keyword(s):  
New Zealand ◽  
Key Points ◽  
Made In

The purpose of this overview is to take stock of the research into labour, employment and work undertaken in New Zealand as represented by this conference and to summarise as succinctly as possible the key points made in each paper.

scholarly journals Apprenticeship in New Zealand : its development, present organization and administration

2021 ◽  
Author(s):  
◽  
Richard Vaughan Kriby
Keyword(s):  
New Zealand ◽  
Organization And Administration ◽  
Boer War ◽  
Machine Age ◽  
The Village ◽  
To Receive ◽  
Made In ◽  
The Ideal ◽  
The Way

"Lumen Accipe et Imperti ", says the motto of Wellington College; and, in becoming a teacher, after being a pupil of the College, I fully accepted the injunction to receive the light and impart it. But it took the preparation of this thesis on the apprenticeship system to bring home to me the<br>strength of the human impulse implied in those four<br>Latin words.<br>In the ideal, the impulse is personified in Oliver Goldsmith's description of the village schoolmaster who "...tried each art, reproved each dull delay; Allur'd to brighter worlds, and led the way."<br><div>It is this impulse to seek skills and to hand them on which helps to explain the enigma of a system apparently always on the point of being out-moded, and yet surviving time and change, depression and prosperity, wars and its greatest challenge, the machine age.</div><div>In 1898 - before the Boer War - a Member of the New Zealand Parliament announced that a pair of boots had been made in 25 minutes, passing through 53 different machines and 63 pairs of hands. The tone of the brief, ensuing discussion was one suited to the occasion of an imminent demise, and a Bill for improvement of the apprenticeship system then before the House quietly expired.<br><br></div>

scholarly journals “On the Margins and Not the Mainstream:” Case Selection for the Implementation of Community Based Primary Health Care in Canada and New Zealand

2017 ◽  
Vol 17 (2) ◽  
Author(s):  
Kerry Kuluski ◽  
Nicolette Sheridan ◽  
Tim Kenealy ◽  
Mylaine Breton ◽  
Ann McKillop ◽  
...  
Keyword(s):  
Health Care ◽  
Primary Health Care ◽  
New Zealand ◽  
Community Based ◽  
Case Selection ◽  
Primary Health ◽  
Selection For

scholarly journals Earthquake insurance

1969 ◽  
Vol 2 (1) ◽  
pp. 116-118
Author(s):  
J. L. Gill
Keyword(s):  
New Zealand ◽  
Direct Result ◽  
Earthquake Insurance ◽  
Insurance Contracts ◽  
Fire Insurance ◽  
Property Owners ◽  
Made In

Property owners in New Zealand obtain indemnity against loss or damage occurring as a direct result of earthquake shock or earthquake fire under a compulsory extension to a contract of fire insurance. A special earthquake and war damage premium is levied under fire insurance contracts made in New Zealand and is paid by the insurer into a fund which is administered by the Commission under the Earthquake and War Damage Act 1944.

scholarly journals Prospects for Trifolium Improvement Through Germplasm Characterisation and Pre-breeding in New Zealand and Beyond

2021 ◽  
Vol 12 ◽  
Author(s):  
Lucy M. Egan ◽  
Rainer W. Hofmann ◽  
Kioumars Ghamkhar ◽  
Valerio Hoyos-Villegas
Keyword(s):  
New Zealand ◽  
Open Space ◽  
Temperate Grassland ◽  
Exotic Germplasm ◽  
Forage Legumes ◽  
Pastoral Production ◽  
Breeding Programmes ◽  
History Of ◽  
The Impact ◽  
Made In

Trifolium is the most used pastoral legume genus in temperate grassland systems, and a common feature in meadows and open space areas in cities and parks. Breeding of Trifolium spp. for pastoral production has been going on for over a century. However, the breeding targets have changed over the decades in response to different environmental and production pressures. Relatively small gains have been made in Trifolium breeding progress. Trifolium breeding programmes aim to maintain a broad genetic base to maximise variation. New Zealand is a global hub in Trifolium breeding, utilising exotic germplasm imported by the Margot Forde Germplasm Centre. This article describes the history of Trifolium breeding in New Zealand as well as the role and past successes of utilising genebanks in forage breeding. The impact of germplasm characterisation and evaluation in breeding programmes is also discussed. The history and challenges of Trifolium breeding and its effect on genetic gain can be used to inform future pre-breeding decisions in this genus, as well as being a model for other forage legumes.

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