Distribution and abundance of freshwater eels (Anguilla spp.) in Tasmania

1984 ◽  
Vol 35 (4) ◽  
pp. 463 ◽  
Author(s):  
RD Sloane
Keyword(s):  
New Zealand ◽  
Coastal Lagoons ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
North Eastern ◽  
Coastal Streams ◽  
Catch Statistics ◽  
The 1960S ◽  
Density And Biomass ◽  
Freshwater Eels

The distribution of A. australis australis Richardson and A. reinhardtii Steindachner in Tasmania was determined from electrofishing surveys and commercial catch records. A. a. australis is abundant in coastal streams and extends far inland in the major drainage systems to the main lakes in Tasmania's Central Highlands. Density and biomass estimates for A. a. australis in streams, <0.01-1 .40 m-2 and 0.04-23.01 g m-2, respectively, are similar to those recorded for A. australis schmidtii Phillipps in New Zealand and for A. anguilla L. in Europe, A. reinhardtii is restricted to coastal lagoons and the lower freshwater reaches and estuaries of streams in north-eastern Tasmania including Flinders Island. Substantial populations of A. reinhardtii reside in these areas (0.05 m-2, 114.66 g m-2 in Douglas River). Analysis of commercial catch statistics indicates that the initial eel yields from standing waterbodies were high in the 1960s by world standards, although landings and catch per unit effort have subsequently declined.

Eels at the Edge: Science, Status, and Conservation Concerns

2009 ◽  
Keyword(s):  
New Zealand ◽  
Management System ◽  
Stock Assessment ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
The North ◽  
Anguilla Australis ◽  
Unit Effort ◽  
Access Rights ◽  
Quota Management

<em>Abstract.</em>—The New Zealand eel fishery comprises two species, the shortfin eel <em>Anguilla australis </em>and the New Zealand longfin eel <em>A. dieffenbachii</em>. A third species, the speckled longfin eel <em>A. reinhardtii</em>, is present in small numbers in some areas. Major fisheries in New Zealand are managed under the Quota Management System. Individual transferable quotas are set as a proportion of an annual total allowable commercial catch. The Quota Management System was introduced into the South Island eel fishery on 1 October 2000 and the North Island fishery on 1 October 2004. Freshwater eels have particular significance for customary Maori. Management policies allow for customary take and the granting of commercial access rights on introduction into the Quota Management System. Eel catches have remained relatively constant since the early 1970s. The average annual catch from 1989–1990 to 2001–2002 (fishing year) was 1,313 mt. Catch per unit effort remained constant from 1983 to 1989 and reduced from 1990 to 1999. Statistically significant declines in catch per unit effort for New Zealand longfin eel were found in some areas over the latter period. For management, an annual stock-assessment process provides an update on stock status.

A length-based Bayesian stock assessment model for the New Zealand abalone Haliotis iris

2003 ◽  
Vol 54 (5) ◽  
pp. 619 ◽  
Author(s):  
Paul A. Breen ◽  
Susan W. Kim ◽  
Neil L. Andrew
Keyword(s):  
New Zealand ◽  
Stock Assessment ◽  
Assessment Model ◽  
Data Sets ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
Data Set ◽  
Future Directions ◽  
Common Component ◽  
Joint Posterior Distribution

We describe a length-based Bayesian model for stock assessment of the New Zealand abalone Haliotis iris (paua). We fitted the model to five data sets: catch-per-unit-effort (CPUE) and a fishery-independent survey index, proportions-at-length from both commercial catch sampling and population surveys, and tag–recapture data. We estimated a common component of error and used iterative re-weighting of the data sets to balance the residuals, removing the arbitrary data set weightings used in previous assessments. Estimates at the mode of the joint posterior distribution were used to explore sensitivity of the results to model assumptions and input data; the assessment itself was based on marginal posterior distributions estimated from Markov chain–Monte Carlo simulation. Assessments are presented for two stocks in the south of New Zealand. One may be recovering after recent catch reductions; the other is over-exploited and likely to decline further. Assessment for the first stock was robust; assessment for the second stock was sensitive to the CPUE data and may be too optimistic. We discuss future directions and potential problems with this approach.

scholarly journals Development and evaluation of catch per unit effort indices for southern blue whiting (Micromesistius australis) on the Campbell Island Rise, New Zealand

2005 ◽  
Vol 62 (6) ◽  
pp. 1131-1138 ◽  
Author(s):  
Stuart M. Hanchet ◽  
Ron G. Blackwell ◽  
Alistair Dunn
Keyword(s):  
New Zealand ◽  
Stock Assessment ◽  
Independent Data ◽  
Catch Per Unit Effort ◽  
Age Composition ◽  
Commercial Catch ◽  
Fourfold Increase ◽  
Fishing Strategies ◽  
Acoustic Surveys ◽  
Campbell Island

Abstract This paper develops standardized commercial cpue indices for a highly aggregated spawning fishery in New Zealand waters, and verifies the indices using fishery-independent data. Indices were calculated for all vessels using three different measures of effort, and for vessel subsets based on processing type (surimi and dressed), and relative experience in the fishery. Trends in cpue were consistent with trends in fishery-independent acoustic surveys, age composition of the commercial catch, and recent stock assessment results. In particular, the cpue indices tracked the more than fourfold increase in abundance from 1993 to 1996 associated with the recruitment of the strong 1991 year class, and the decline in relative abundance as this year class was fished down. Despite this being a highly aggregated spawning fishery, there was little evidence for hyperstability. There were also significant differences in fishing strategies of the fleets between periods of high and low fish abundance.

Use of Ornamental Trees in Dating of Abandoned Cemeteries on the Example of Thuja Occidentalis and Thuja Orientalis

2012 ◽  
Vol 1 (1) ◽  
pp. 45-50
Author(s):  
Magdalena Opała ◽  
Leszek Majgier
Keyword(s):  
Climatic Conditions ◽  
The Other ◽  
Lake District ◽  
Thuja Occidentalis ◽  
North Eastern ◽  
The 1960S ◽  
Thuja Orientalis ◽  
Ornamental Trees ◽  
Common Tree ◽  
Local Habitat

Abstract Due to the lack of maintenance, abandoned cemeteries are often incorporated into the landscape. In many cases the information about the age of the cemetery is unavailable. To find out the approximate time of the formation of the cemetery the information recorded in the annual tree and shrub rings can be used. One of the most common tree species, planted for ornamental and symbolic purposes on the cemeteries, are Thuja orientalis and Thuja occidentalis. Alien to the Polish flora, these species adapted well to the local habitat and climatic conditions. The paper presents an attempt to apply dendrochronological dating to determine the age of the abandoned cemeteries in the region of the Great Masurian Lakes, part of the Masurian Lake District (north-eastern Poland). The study included five abandoned cemeteries. In total, 15 cores were taken from the trees. After applying the standard dendrochronological method, local chronologies for the studied species were established. The research indicated that the oldest found specimens - over 70 yrs old - are Thuja occidentalis individuals growing at the Słabowo cemetery. At the other sites the specimens of both Thuja species date back to the 1960s and early 1970s. Compared to the historical information regarding the age and origin of the studied objects, thujas growing there are much younger than the age of the cemeteries foundation. The presented method proved to be very helpful in understanding the time of Thuja occidentalis and Thuja orientalis introduction at the investigated cemeteries.

scholarly journals Regulation of bacterioplankton density and biomass in tropical shallow coastal lagoons

2013 ◽  
Vol 25 (3) ◽  
pp. 224-234 ◽  
Author(s):  
Fabiana MacCord ◽  
Fernanda Dall Ara Azevedo ◽  
Francisco de Assis Esteves ◽  
Vinicius Fortes Farjalla
Keyword(s):  
Coastal Lagoons ◽  
Density And Biomass

A Stagecraft of New Zealand Evaluation

2005 ◽  
Vol 5 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Neil T Lunt ◽  
Ian G Trotman
Keyword(s):  
New Zealand ◽  
Performance Management ◽  
Best Practice ◽  
Companion Paper ◽  
Cultural Practice ◽  
Tertiary Sector ◽  
Evaluation Activity ◽  
The Public ◽  
History Of ◽  
The 1960S

Since the 1960s there has been a growing interest in evaluation shown by most Western countries. Alongside discussion of practical and theoretical issues of evaluation, such as methodological developments, best practice, and cross-cultural practice, there has also been increased interest in mapping the history of evaluation activity. Historical discussions are significant for three reasons; first, in providing a record for future generations of evaluators. Second, they provide a consideration of the domestic and international context that has shaped evaluation development, giving each country its distinct institutional make-up and brand of evaluation activity. Third, they assist a country's evaluation capacity development by building on its strengths and compensating for the weaknesses of its history. This article traces the emergence of evaluation within New Zealand using the metaphor of dramaturgy to introduce the settings and actors that we consider to have been constituent of what was played out in the New Zealand situation. Our remit is a broad one of attempting to describe and explain the range of evaluation activities, including program evaluation, organisational review, performance management, and process and policy evaluation. Within this article a broad overview only is possible. As an example of a more in-depth study, a comprehensive article could be prepared on the history of performance management in the public service. Our comments cover developments in the public sector, tertiary sector, and private and professional organisations. It is a companion paper to one on the history of evaluation in Australia, prepared by Colin A Sharp in a recent issue of this journal (Sharpe 2003).

scholarly journals ‘IT'S NOT SOMETHING ONE CAN DELIBERATELY SET OUT TO DO’: CHRISTIAN WOLFF IN CONVERSATION

Tempo ◽  
2017 ◽  
Vol 72 (283) ◽  
pp. 56-79
Author(s):  
James Gardner ◽  
Christopher Fox
Keyword(s):  
New Zealand ◽  
Contemporary Music ◽  
The Political ◽  
Music Festival ◽  
Christian Wolff ◽  
The 1950S ◽  
The 1960S

ABSTRACTIn 2002 Christian Wolff was a guest composer at the Huddersfield Contemporary Music Festival and during the course of the festival he was interviewed by Christopher Fox and by James Gardner. Fox's interview took place before an audience in the Lawrence Batley Theatre on 25 November; Gardner's interview was recorded in private in the George Hotel, Huddersfield on 27 November, and edited excerpts from that recording were subsequently used in a programme produced by Radio New Zealand. The conversation presented here has been compiled by James Gardner from his transcriptions of the two interviews and presents a wide-ranging discussion of Wolff's musical preoccupations across every phase of his compositional career, from the early piano pieces of the 1950s, to his involvement with indeterminacy in the 1960s, to the political concerns evident in his music after 1970, to the works of the last three decades in which indeterminate and determinate methods of composition are combined.

"... about as austere as a Dior gown ...": New Zealand architecture in the 1960s

2005 ◽  
Vol 2 ◽  
pp. 1-2
Author(s):  
Christine McCarthy
Keyword(s):  
New Zealand ◽  
Gold Medal ◽  
Full Length ◽  
Medal Award ◽  
The 1960S

Peter Middleton's 1964 description of Hoogerburg Scott's Futuna Chapel (1958-1960) as being "about as austere as a Dior gown and as comforting as a hair shirt ... [but] at least it's a meaningful statement" points to a sense of complexity and contradiction present in the architecture of the 1960s. The decade which began with Futuna's completion, ends shortly after its recognition with an NZIA Gold Medal Award in 1968. The significance of the building weaves through the full length of the decade.

Cot death

2021 ◽  
pp. 377-382
Author(s):  
Michael Obladen
Keyword(s):  
New Zealand ◽  
The Netherlands ◽  
19Th Century ◽  
Causes Of Death ◽  
Epidemiological Evidence ◽  
England And Wales ◽  
Cot Death ◽  
Prone Sleeping ◽  
The 1960S ◽  
The 19Th Century

Since antiquity, cot death was explained as accidental suffocation, overlaying, or smothering. Parents were blamed for neglect or drunkenness, and a cage called arcuccio was invented around 1570 to protect the sleeping infant. Up to the 19th century, accidents were registered as natural causes of death. From 1830, accidental suffocation became unacceptable for physicians and legislators, and ‘natural’ explanations for the catastrophe were sought, with parents being consoled rather than blamed. Prone sleeping originated in the 1930s and from 1944 was associated with cot death. However, from the 1960s many authors recommended prone sleeping for infants, and many countries adopted the advice. A worldwide epidemic followed, peaking at 2% in England and Wales and 5% in New Zealand in the 1980s. Although epidemiological evidence was available by 1970, the first intervention was initiated in the Netherlands in 1989. Cot death disappeared almost entirely wherever prone sleeping was avoided. This strongly supports the assumption that prone sleeping has the greatest influence on the disorder, and that the epidemic resulted from wrong advice.

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