Mating Behaviour of Australian Isolates of Phytophthora Species. I. Inter- and Intraspecific Mating

1978 ◽  
Vol 26 (2) ◽  
pp. 123 ◽  
Author(s):  
CJ Shepherd
Keyword(s):  
Sexual Reproduction ◽  
Papua New Guinea ◽  
Sexual Behaviour ◽  
Mating Behaviour ◽  
Phytophthora Species ◽  
The Other ◽  
Detailed Report ◽  
Mating Patterns ◽  
Phytophthora Drechsleri ◽  
New Britain

This paper presents the first detailed report on the mating behaviour of isolates of Phytophthora drechsleri, P. cinnamomi, P. parasitica, P. palmivora, P. cryptogea and P. cambivora from Australia, Papua New Guinea and New Britain. In all, 97 isolates of Australasian origin and four isolates of American origin were examined. Matings between species produced fewer oogonia and more aborted oogonia than occurred in intraspecific matings. Isolates differed in their abilities to form oogonia in interspecific matings. Unlike the other species examined, P. drechsleri isolates were unable to form oogonia and oospores in many of the intraspecific matings attempted. In general, the mating patterns of P. Cryptogea isolates were similar to those of P. drechsleri, which supports the conclusion that these taxa are conspecific. Isolates of P. parasitica mated freely in intraspecific pairings but showed some restrictions in interspecific matings, with aborted oogonia frequently being produced. The behaviour of single- zoospore derivatives from seven P.parasitica isolates that exhibited irregular sexual behaviour during culture showed that three of the field isolates were heterocaryotic, carrying both homothallic and A1 type nuclei. Both homogenic and heterogenic incompatibility mechanisms may be operative as barriers to free sexual reproduction. The present study indicates that determinations of mating competence are of little taxonomic value.

INFLUENCE OF NEONATAL GESTAGEN INJECTION ON THE DIFFERENTIATION OF PSYCHOSEXUALITY IN FEMALE RATS

1971 ◽  
Vol 67 (3) ◽  
pp. 544-550
Author(s):  
H. Steinbeck ◽  
B. Cupceancu ◽  
M. Mehring ◽  
F. Neumann
Keyword(s):  
Side Effects ◽  
Sexual Behaviour ◽  
Mating Behaviour ◽  
Adult Life ◽  
Female Rats ◽  
Hormonal Stimulation ◽  
Mating Patterns ◽  
Behavioural Patterns ◽  
Neonatal Injection ◽  
Norethindrone Acetate

ABSTRACT The influence of neonatal injection of gestagens with androgenic, oestrogenic, or no side activities on sexual behaviour differentiation was studied in female rats. Single injections of norethindrone acetate, ethinodiol diacetate and norethindrone oenanthate, which are steroids with inherent oestrogenic activities, suppressed the capacity to display lordosis responses in adult life after hormonal stimulation. Both norethindrone esters also caused a certain shift of psychosexuality towards masculinity. The incidence of bisexuality was, however, extremely low in all the rats. Androgenic gestagens, i. e. d.l-norgestrel and norethandrolone, did not suppress female differentiation of sexuality; there was moreover no increase in male behavioural patterns. Norhydroxyprogesterone caproate, megestrol acetate and a new synthetic progesterone derivative (clomegestone acetate), all steroids with no side activities, were without any effect on mating behaviour differentiation. Allylestrenol and medroxyprogesterone acetate suppressed the capacity to display feminine mating patterns but did not induce male behaviour. It is most likely, however, that this result is due to the administration of higher gestagen doses rather than to any side effects of either steroid.

Incest Offences and Alcoholism

1974 ◽  
Vol 14 (2) ◽  
pp. 124-128 ◽  
Author(s):  
M. Virkkunen
Keyword(s):  
Sexual Behaviour ◽  
Psychiatric Hospitalization ◽  
Large Family ◽  
Sexual Attitude ◽  
Living Conditions ◽  
The Other ◽  
Alcoholic Drinks ◽  
The Relationship ◽  
At Home

The purpose of this study was to clarify whether alcoholic incest offenders differ from other criminals who commit these offences. The series consisted of 45 cases of incest, of which 22 cases (48.9 per cent) gave an indication of alcoholism in the offender. The alcoholics showed more evidence of previous criminal offences, and this was especially true when considering acts of violence only. The alcoholics had also exhibited more often than the others aggressive features at home before the detection of incest. Statistically, significant differences were not arrived at as to depression, psychotic disturbances, intellectual defects, problems of jealousy, psychiatric hospitalization, and earlier sexual behaviour. The spouse had a rejective sexual attitude towards the offender in alcoholic cases more frequently than in other cases. The cause of this appeared to be mainly disgust at the abuse of alcoholic drinks and its consequences, as well as the result of a large family and/or poor living conditions. In more than half of the cases of incest in both groups actual intercourse had taken place. Generally, the relationship had, however, started by only touching sexual organs and so forth. According to the offender the victim had shown activity in one-third of the cases of alcoholics. The alcoholic offender tended to be under the influence of alcohol at least at the beginning of the relationship more often than the non-alcoholic person. Offences or an offence were reported by the victim or the offender's spouse in the cases of alcoholics more often than in the other cases; then the informer was usually an outsider. However, the victim's and the spouse's fear of the offender was one reason for concealment when the alcoholics were involved.

Papua New Guinea, East New Britain, Bismark Sea Coast

2021 ◽  
Vol 100 (sp1) ◽  
Author(s):  
Charles W. Finkl ◽  
Christopher Makowski
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
New Britain ◽  
Sea Coast

Elsinoe batatas. [Distribution map].

1982 ◽  
Author(s):  
Keyword(s):  
Papua New Guinea ◽  
Ipomoea Batatas ◽  
New Caledonia ◽  
Solomon Islands ◽  
Rio Grande ◽  
Distribution Map ◽  
Caroline Islands ◽  
New Hebrides ◽  
New Britain ◽  
New Distribution

Abstract A new distribution map is provided for Elsinoe batatas (Saw.) Viegas & Jenkins. Hosts: Sweet potato (Ipomoea batatas). Information is given on the geographical distribution in ASIA, Brunei, China, Hong Kong, Indonesia, Japan, Malaysia, Taiwan, AUSTRALASIA & OCEANIA, Caroline Islands, Fiji, Guadalcanal, Guam, New Britain, New Caledonia, New Hebrides, Papua New Guinea, Solomon Islands, Tonga, NORTH AMERICA, Mexico, SOUTH AMERICA, Brazil (Sao Paulo, Bahia, Campinas, Algoinhas, Rio Grande).

Radiocarbon Dates from West New Britain, Papua New Guinea

1981 ◽  
Vol 12 (1) ◽  
pp. 13-15 ◽  
Author(s):  
Jim Specht ◽  
Ian Lilley ◽  
John Normu
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Radiocarbon Dates ◽  
New Britain

35,000-year-old sites in the rainforests of West New Britain, Papua New Guinea

Antiquity ◽  
1994 ◽  
Vol 68 (260) ◽  
pp. 604-610 ◽  
Author(s):  
Christina Pavlides ◽  
Chris Gosden
Keyword(s):  
Papua New Guinea ◽  
Pacific Islands ◽  
Tropical Rainforest ◽  
New Guinea ◽  
Northwest Pacific ◽  
Open Site ◽  
Early Settlement ◽  
The World ◽  
Cultural Layers ◽  
New Britain

The growing story of early settlement in the northwest Pacific islands is moving from coastal sites into the rainforest. Evidence of Pleistocene cultural layers have been discovered in open-site excavations at Yombon, an area containing shifting hamlets, in West New Britain's interior tropical rainforest. These sites, the oldest in New Britain, may presently stand as the oldest open sites discovered in rainforest anywhere in the world.

scholarly journals Germination of Balsa Seedlings (Ochroma lagopus Swartz) under Different Sowing Media in East New Britain, Papua New Guinea

2021 ◽  
pp. 73-88
Author(s):  
Boas Malagat ◽  
Kari Iamba
Keyword(s):  
Papua New Guinea ◽  
Seedling Emergence ◽  
Garden Soil ◽  
Gaseous Exchange ◽  
Phenotypic Characteristics ◽  
The Third ◽  
Daily Average ◽  
Emergence Rate ◽  
New Britain ◽  
Local Materials

A good sowing media ensures better anchorage of plants, provides a reservoir of  nutrients and water, and enhance gaseous exchange with the atmosphere. Balsa (Ochroma lagopus Swartz); Vimmy variety, has proven its versatility in producing some of the best phenotypic characteristics such as higher jorquette height, less branching and high log volumes. This experiment was carried out using a combination of three different local materials; local garden soil, pumice soil and sawdust but in different combination ratios aimed to investigate the best combinations. Six treatments were tested: T1= Pure Garden soil, T2= Pumice, T3= Control (75% large coarse sawdust, 25% pure garden soil), T4= Pure Sawdust, T5= 50% medium coarse sawdust, 50% pure soil, and, T6= 33% medium coarse sawdust, 33% Pumice, 33% Pure garden Soil. The daily average germination count in Treatment 5 (50% medium coarse sawdust & 50% pure soil) produced constant germinations from day fifteen (15) to day twenty one (21). Treatments 1, 2, 3, 4 and 6 showed high variations in their daily average germination for the same period but did not produce a constant supply of germinations. Treatment 5 had the highest emergence rate index (ERI=71.76) followed by treatment 1 (ERI=66.59).  Treatment 4 had the third highest seedling emergence (ERI=63.74) followed by treatment 3 (ERI=59.37), treatment 6 (ERI=57.22) and treatment 2 (ERI=53.81) at the lowest continuum. Substrates containing 50% soil and 50% medium coarse sawdust are regarded as better sowing media for O. lagopus seedlings.

scholarly journals Enacting the Absent State: State-formation on the oil-palm frontier of Pomio (Papua New Guinea)

2018 ◽  
Author(s):  
Tuomas Tammisto
Keyword(s):  
Papua New Guinea ◽  
State Formation ◽  
Oil Palm ◽  
New Guinea ◽  
The State ◽  
Rural District ◽  
Top Down ◽  
Active Worker ◽  
The Relationship ◽  
New Britain

Tammisto, Tuomas 2016. Enacting the Absent State: State-formation on the oil-palm frontier of Pomio (Papua New Guinea). Paideuma: Mitteilungen zur Kulturkunde 62: 51-68. In this article I examine the relationship between new oil-palm plantations and state-formation in Pomio, a remote rural district of East New Britain Province (Papua New Guinea). I am particularly interested in the kinds of spaces of governance produced by the new oil-palm plantations and how this contributes to state formation and territorialisation in Pomio.Plantations in Pomio do not became state-like spaces as a result of top-down processes alone, but also because of active worker initiatives. By contributing to state formation in this way, the inhabitants of Pomio also make claims on what the state should be like. While plantations become governable and statelike spaces, they do not produce simply governable subjects, nor do they produce a uniformly governable territory but an uneven space in which some places are more governable than others. The inhabitants of Pomio move between these places in their pursuit of different goals.

scholarly journals Pathogenicity of four Phytophthora species on kauri in vitro and glasshouse trials

2014 ◽  
Vol 67 ◽  
pp. 54-59 ◽  
Author(s):  
I.J. Horner ◽  
E.G. Hough
Keyword(s):  
Plant Growth ◽  
Forest Soils ◽  
Phytophthora Cinnamomi ◽  
Phytophthora Species ◽  
The Other ◽  
Root Damage ◽  
Soil Inoculation

In kauri forest soils surveys Phytophthora taxon Agathis (PTA) P cinnamomi P multivora and P cryptogea were detected frequently In vitro and glasshouse studies determined that all four Phytophthora species produced lesions on excised kauri leaves and stems Lesion advance was significantly slower with P cinnamomi P multivora and P cryptogea than with PTA When 2yearold kauri seedlings were trunkinoculated lesion spread was rapid with PTA trunks were girdled and all trees died within 46 weeks Phytophthora cinnamomi P multivora and P cryptogea produced substantially smaller lesions than PTA no trees died and plant growth was only slightly suppressed Following soil inoculation with PTA all kauri seedlings died within 10 weeks There were no deaths following soil inoculation with P cinnamomi P multivora or P cryptogea although feeder root damage was observed and the respective pathogens were reisolated Results suggest that PTA is an aggressive pathogen and the other three species are weaker pathogens of kauri

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