Genetic analysis of a documented population bottleneck: introduced Bennett's wallabies (Macropus rufogriseus rufogriseus) in New Zealand

2000 ◽  
Vol 9 (6) ◽  
pp. 753-763 ◽  
Author(s):  
S. L. Le Page ◽  
R. A. Livermore ◽  
D. W. Cooper ◽  
A. C. Taylor
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Population Bottleneck

scholarly journals Crossing the front: contrasting storm-forced dispersal dynamics revealed by biological, geological and genetic analysis of beach-cast kelp

2018 ◽  
Vol 15 (140) ◽  
pp. 20180046 ◽  
Author(s):  
Jonathan M. Waters ◽  
Tania M. King ◽  
Ceridwen I. Fraser ◽  
Dave Craw
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Wind Direction ◽  
Storm Events ◽  
Temperate Water ◽  
Marine Dispersal ◽  
Quantitative Analyses ◽  
Dispersal Distances ◽  
Warm Temperate ◽  
Beach Cast

The subtropical front (STF) generally represents a substantial oceanographic barrier to dispersal between cold-sub-Antarctic and warm-temperate water masses. Recent studies have suggested that storm events can drastically influence marine dispersal and patterns. Here we analyse biological and geological dispersal driven by two major, contrasting storm events in southern New Zealand, 2017. We integrate biological and physical data to show that a severe southerly system in July 2017 disrupted this barrier by promoting movement of substantial numbers of southern sub-Antarctic Durvillaea kelp rafts across the STF, to make landfall in mainland NZ. By contrast, a less intense easterly storm (Cyclone Cook, April 2017) resulted in more moderate dispersal distances, with minimal dispersal between the sub-Antarctic and mainland New Zealand. These quantitative analyses of approximately 200 freshly beach-cast kelp specimens indicate that storm intensity and wind direction can strongly influence marine dispersal and landfall outcomes.

scholarly journals A genetic analysis of mallards, grey ducks, and their hybrids in New Zealand

1990 ◽  
Vol 17 (3) ◽  
pp. 467-472 ◽  
Author(s):  
R.A. Hitchmough ◽  
M. Williams ◽  
C.H. Daugherty
Keyword(s):  
New Zealand ◽  
Genetic Analysis

Genetic Analysis of Litter Size, Mortality and Growth Traits of New Zealand White Rabbits1

1988 ◽  
Vol 4 (2) ◽  
pp. 11-16 ◽  
Author(s):  
Z.B. Johnson ◽  
D.J. Harris ◽  
C.J. Brown ◽  
Will R. Getz ◽  
Robert L. Harrold
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Litter Size ◽  
Growth Traits

The genus Pseudolycoriella Menzel & Mohrig, 1998 (Diptera, Sciaridae) in New Zealand

Zootaxa ◽  
2019 ◽  
Vol 4707 (1) ◽  
pp. 1-69
Author(s):  
ARNE KÖHLER
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Nuclear Gene ◽  
Species Group ◽  
Mitochondrial Genes ◽  
Species Complexes ◽  
Senior Synonym ◽  
First Time

In the course of the present study 28 species of the genus Pseudolycoriella Menzel & Mohrig, 1998 from New Zealand were described as new to science: Pseudolycoriella aotearoa sp. n., Psl. dagae sp. n., Psl. dentitegmenta sp. n., Psl. fiordlandia sp. n., Psl. gonotegmenta sp. n., Psl. hauta sp. n., Psl. huttoni sp. n., Psl. jaschhofi sp. n., Psl. jejunella sp. n., Psl. kaikoura sp. n., Psl. maddisoni sp. n., Psl. mahanga sp. n., Psl. nahenahe sp. n., Psl. orite sp. n., Psl. plicitegmenta sp. n., Psl. porehu sp. n., Psl. porotaka sp. n., Psl. puhihi sp. n., Psl. raki sp. n., Psl. robustotegmenta sp. n.,Psl. subtilitegmenta sp. n., Psl. sudhausi sp. n., Psl. teo sp. n., Psl. tewaipounamu sp. n., Psl. tuakana sp. n., Psl. wernermohrigi sp. n., Psl. whakahara sp. n., and Psl. whena sp. n. Pseudolycoriella cavatica (Skuse, 1888), a widely distributed species, was recorded from New Zealand for the first time, and recognised as a senior synonym of Spathobdella setigera Hardy, 1960 syn. n. Apart from Psl. kaikoura and Psl. cavatica all New Zealand Pseudolycoriella species group in four different clusters: the Psl. bispina complex, the Psl. jejuna complex, the Psl. macrotegmenta complex, and the Psl. zealandica complex. The monophyly of those four species complexes was confirmed by a genetic analysis based on two mitochondrial genes (COI and 16S) and one nuclear gene (28S). A key to the species is given.  

scholarly journals American foulbrood and its causative agent, Paenibacillus larvae, in New Zealand’s registered hives and apiaries

2021 ◽  
Author(s):  
◽  
Samantha Amy Montrose Graham
Keyword(s):  
New Zealand ◽  
Statistical Analysis ◽  
Genetic Analysis ◽  
Honey Bee ◽  
Causative Agent ◽  
Management Strategies ◽  
Paenibacillus Larvae ◽  
Bacterial Disease ◽  
American Foulbrood ◽  
Infection Rates

<p>Though the honey bee (Apis mellifera) is exposed to an extensive diversity of parasites and pathogens from multiple kingdoms, few are as devastating as American foulbrood. American foulbrood is a highly contagious bacterial disease, of which the causative agent (bacterium Paenibacillus larvae) infects honey bee brood through the ingestion of its spores, ultimately leading to the death of the infected larva and the collapse of the infected hive. Paenibacillus larvae’s genotypes (ERIC I-IV) exhibit differing ‘killing time’ of infected larvae, resulting in different larval and colony level virulence of the disease within hives.  American foulbrood is found in New Zealand’s registered hives, and poses a threat to the country’s apiculture industry. The first objective of this thesis was to perform a genetic analysis on New Zealand’s P. larvae field strains using the well-established methodology of rep-PCR with MBO REP1 primers. A total of 172 bacteria isolates were gathered from registered hives from 2011 to 2014 and examined. The MBO REP1 primer identifies the ‘beta’ genetic subgroups of P. larvae. By identifying beta subgroups, the ERIC genotypes that are present in New Zealand can also be concluded. The genetic analysis of P. larvae using rep-PCR is a first for New Zealand, and appears to be a first for Australasia. The second objective of this thesis was to conduct a temporal and geographical statistical analysis on American foulbrood infection rate trends in New Zealand’s national and regional, divided into seven regions, registered hives and apiaries from 1994 to 2013.  The genetic analysis of P. larvae detected three ‘beta’ genotypic subgroups: B, b, and Б. From these findings it was concluded that ERIC I and ERIC II are present in New Zealand. Previous to my findings, subgroup B and Б and ERIC II genotype had not been recorded outside of Europe. The statistical analysis reported that American foulbrood infection rates were significantly decreasing nationally. Results also reported that four of the seven regions’ infection rates were significantly decreasing, whilst three regions were significantly increasing.  Conclusions on the subgroups and genotypes present in New Zealand gives the first insight to the virulence and occurrence of P. larvae strains. Additionally, the use of rep-PCR for the genetic analysis of P. larvae enables this thesis to contribute to the increasing knowledge on American foulbrood. By examining the temporal and geographic dynamics of American foulbrood, the results allow for the evaluation of current management strategies and the most recent understanding on the national and regional infection rates of the disease.</p>

A preliminary genetic analysis of breech and tail traits with the aim of improving the welfare of sheep

2007 ◽  
Vol 58 (2) ◽  
pp. 161 ◽  
Author(s):  
D. R. Scobie ◽  
D. O'Connell ◽  
C. A. Morris ◽  
S. M. Hickey
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Genetic Correlation ◽  
Genetic Correlations ◽  
Phenotypic Correlation ◽  
Linear Scale ◽  
Bare Area ◽  
Phenotypic Correlations ◽  
Tail Docking

The area of naturally bare skin around the perineum was scored at weaning in lambs (n = 2152) from a composite flock of New Zealand crossbred sheep. Breech bareness was scored on a range from 1, where wool was growing right to the edges of the anus, to 5, where a large bare area surrounded the perineum. Bareness on the under surface of the tail was measured on a linear scale at tail docking. Dag score (degree of breech soiling) was recorded at weaning, on a scale of 0–5, where an increasing score indicated more dags. Dag score was taken as a measure of the risk of flystrike in the breech. Female lambs tended to have slightly greater (P < 0.001) breech bareness score (mean score 2.7) than males (mean score 2.6), whereas mean dag score of females was lower than that of males (0.45 v. 0.53; P < 0.05). Breech bareness score had a heritability of 0.33 ± 0.06, and the length of bare skin under the tail had a heritability of 0.59 ± 0.06. The genetic correlation between breech bareness score at weaning and length of bare skin under the tail at docking was positive (0.35 ± 0.10). These 2 traits had phenotypic correlations with dag score of –0.17 ± 0.02 and –0.03 ± 0.03, respectively, and genetic correlations with dag score of –0.30 ± 0.13 and 0.03 ± 0.12, respectively; negative values indicated a favourable relationship. Tails were removed at docking, so the phenotypic correlation of about zero between tail data and dag score at weaning was of little utility. Our results suggest that selecting for these 2 bareness traits could reduce dag formation and the associated risk of breech strike.

scholarly journals Novel approaches to genetic analysis of fertility traits in New Zealand dairy cattle

2015 ◽  
Vol 98 (3) ◽  
pp. 2005-2012 ◽  
Author(s):  
F.E. Bowley ◽  
R.E. Green ◽  
P.R. Amer ◽  
S. Meier
Keyword(s):  
New Zealand ◽  
Genetic Analysis ◽  
Dairy Cattle ◽  
Novel Approaches ◽  
Fertility Traits
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