Experience with Management of Orange Roughy (Hoplostethus atlanticus) in New Zealand Waters, and the Effects of Commercial Fishing on Stocks over the Period 1980–1993

1995 ◽  
pp. 251-266 ◽  
Author(s):  
Malcolm Clark
Keyword(s):  
New Zealand ◽  
Commercial Fishing ◽  
Orange Roughy ◽  
Hoplostethus Atlanticus

Enzyme variation in orange roughy, Hoplostethus atlanticus (Teleostei: Trachichthyidae), from southern Australian and New Zealand waters

1992 ◽  
Vol 43 (6) ◽  
pp. 1561 ◽  
Author(s):  
NG Elliott ◽  
RD Ward
Keyword(s):  
Genetic Diversity ◽  
New Zealand ◽  
Sampling Error ◽  
Genetic Homogeneity ◽  
Gene Frequencies ◽  
Orange Roughy ◽  
Enzyme Variation ◽  
Enzyme Loci ◽  
Total Genetic Diversity ◽  
Hoplostethus Atlanticus

Orange roughy from six localities around the southern coasts of Australia showed no evidence of genetic subdivision when the products of 11 polymorphic enzyme loci were analysed electrophoretically. Samples ranged in size from 84 to 171 per locality. Gene frequencies were very similar in samples taken from New Zealand. The amount of total genetic diversity attributable to subdivision among samples is estimated at 0.55 to 0.22%, but bootstrapping procedures showed that much of this diversity could arise from sampling error. A minimum of around 200 migrants per locality per generation would be sufficient to maintain the observed genetic homogeneity, although actual numbers migrating are likely to be greater than this.

Use of Risk Analysis to Assess Fishery Management Strategies: A Case Study using Orange Roughy (Hoplostethus atlanticus) on the Chatham Rise, New Zealand

1992 ◽  
Vol 49 (5) ◽  
pp. 922-930 ◽  
Author(s):  
R. I C. C. Francis
Keyword(s):  
New Zealand ◽  
Risk Analysis ◽  
Fishery Management ◽  
Management Strategies ◽  
Scientific Advice ◽  
Orange Roughy ◽  
Biological Risk ◽  
Stock Assessments ◽  
Hoplostethus Atlanticus

Risk analysis can enhance the value of scientific advice to fishery managers by expressing the uncertainty inherent in stock assessments in terms of biological risk. I present a case study involving an overexploited population of orange roughy (Hoplostethus atlanticus) on the Chatham Rise, New Zealand. This analysis quantifies the risk to the fishery and shows how this decreases as the rate of reduction in total allowble catch increases. The technique helps fishery managers balance biological risk against economic risk. Ways of generalizing the technique are discussed.

The cost of overfishing and management strategies for new fisheries on slow-growing fish: orange roughy (Hoplostethus atlanticus) in New Zealand

2006 ◽  
Vol 63 (10) ◽  
pp. 2149-2153 ◽  
Author(s):  
Ray Hilborn ◽  
John Annala ◽  
Daniel S Holland
Keyword(s):  
New Zealand ◽  
Management Strategies ◽  
Maximum Sustainable Yield ◽  
Economic Consequences ◽  
Orange Roughy ◽  
Potential Yield ◽  
Capacity Limits ◽  
Fisheries Resources ◽  
Management Approaches ◽  
Hoplostethus Atlanticus

The history of orange roughy (Hoplostethus atlanticus) stocks, primarily in New Zealand and Australia, is commonly used as an example of the inability to manage fisheries resources. We review the history and status of the New Zealand orange roughy fishery and show that the total loss of potential biological yield from overfishing is no more than 8.3% (1260 tonnes (t)·year–1) of the potential yield. The losses from underfishing are estimated to be 810 t·year–1. We consider the biological and economic consequences of alternative management approaches to the New Zealand orange roughy fishery. We suggest that given the uncertainty in stock abundance and productivity and market and processing capacity limits, the management of New Zealand orange roughy stocks has been close to economically optimal and has produced near maximum sustainable yield from the resource.

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