Measurement of Catch and Fishing Effort in the Western Rock Lobster Fishery

2008 ◽  
pp. 334-356 ◽  
Author(s):  
N. Caputi ◽  
C.F. Chubb ◽  
N.G. Hall ◽  
R.S. Brown
Keyword(s):  
Fishing Effort ◽  
Rock Lobster ◽  
Lobster Fishery

scholarly journals Evaluating the ecosystem effects of variation in recruitment and fishing effort in the western rock lobster fishery

2013 ◽  
Vol 145 ◽  
pp. 128-135 ◽  
Author(s):  
Hector Lozano-Montes ◽  
Neil R. Loneragan ◽  
Russ Babcock ◽  
Nick Caputi
Keyword(s):  
Fishing Effort ◽  
Rock Lobster ◽  
Ecosystem Effects ◽  
Lobster Fishery

Restructuring the Tasmanian rock-lobster fishery - the effect of two years of management under individual transferable quotas

2001 ◽  
Vol 52 (8) ◽  
pp. 1641 ◽  
Author(s):  
Wes Ford ◽  
Wes Ford
Keyword(s):  
Egg Production ◽  
Fishing Effort ◽  
Rock Lobster ◽  
Quota System ◽  
Individual Transferable Quotas ◽  
Fishing Vessels ◽  
Early Results ◽  
Lobster Fishery ◽  
Quota Management ◽  
One Year

Individual transferable quotas were successfully introduced into the Tasmanian rock-lobster fishery in 1998. In the two years since, significant industry restructuring has occurred. The move to quota management was intended to meet two key objectives: to reduce the catch to a sustainable level, allowing the stock to rebuild, and to provide a mechanism whereby the industry could achieve economic sustainability. The quota system has achieved early results on both the sustainability and restructuring objectives and is now well accepted and supported by the vast majority of fishers and licence holders. Its effect has been to reduce fishing effort by 29% and number of fishing vessels by 23%, and the reduction in catch has resulted in a 6% increase in the estimated biomass and substantial increases in egg production after one year. Fishers now spend fewer days at sea, and catch rates are improving. These changes are reducing fishing costs, which in time should increase profitability. Social costs of introducing quotas are that fewer fishers are employed on vessels and that fishers now find it harder and more expensive to lease a fishing licence. These costs must be factored into any assessment of the industry.

scholarly journals Changes in the lease and permanent sale quota markets of a rock lobster fishery in response to stock abundance

2015 ◽  
Vol 72 (5) ◽  
pp. 1555-1564 ◽  
Author(s):  
Rafael León ◽  
Caleb Gardner ◽  
Ingrid van Putten ◽  
Klaas Hartmann
Keyword(s):  
Granger Causality Test ◽  
Economic Rent ◽  
Rock Lobster ◽  
Markov Modelling ◽  
Causality Test ◽  
Individual Transferable Quotas ◽  
Theoretical Pattern ◽  
Lobster Fishery ◽  
Trade Market ◽  
Stock Abundance

AbstractEffective individual transferable quotas (ITQ) systems rebuild stocks and allow transfer of quotas to more efficient operators. This process requires functional markets for both quota sales and temporary quota leases. These markets are expected to respond to changes in economic rent from the fishery, which is influenced by stock abundance and the international rock lobster price. This research used multistate Markov modelling and Granger causality test to examine changes in the permanent and temporary quota trade in the Tasmanian rock lobster fishery quota market, during periods of both increasing and decreasing stock abundance. The permanent quota trade market was more active during the period of stock growth, while the quota lease market was active in both periods of stock growth and decline. In contrast to theoretical trends in ITQ fisheries, trades in both markets were not linked to the technical efficiency (i.e. catching capability) of operators, but were more driven by the quota owners' financial capacity (i.e. number of owned quotas). Prolonged and unexpected stock decline affected the quota market so that it deviated from the theoretical pattern of ITQ fisheries. Operators previously active in the market reduced their activity, while smaller operators and firms that previously had not traded became more active, so the fleet expanded with smaller operators entering.

Climate Vulnerability and its Perceived Impact on the Namibian Rock Lobster Fishery

2021 ◽  
pp. 1843-1863
Author(s):  
Johannes A. Iitembu ◽  
Paulus Kainge ◽  
Warwick H. H. Sauer
Keyword(s):  
Rock Lobster ◽  
Climate Vulnerability ◽  
Lobster Fishery ◽  
Perceived Impact

scholarly journals Costs and Returns of Fishermen in the Massachusetts Inshore Lobster Fishery

1975 ◽  
Vol 4 (2) ◽  
pp. 195-210 ◽  
Author(s):  
J. M. Gates ◽  
J. M. D'Eugenio
Keyword(s):  
Fisheries Management ◽  
Fishing Effort ◽  
The State ◽  
Economic Factors ◽  
Sufficient Criterion ◽  
Fish Stocks ◽  
The Past ◽  
Resource Managers ◽  
Lobster Fishery

The inshore lobster fishery is one of the more important ones in the Commonwealth of Massachusetts, accounting for approximately 14 percent of the total landed value of all species in Massachusetts in 1971. Until recent years this fishery accounted for virtually all the pot landings in the state. Despite numerous attempts at conservation such as gear regulation, size restrictions, and prohibitions on harvesting egg-bearing females, the fishery has been subject to rapidly increasing effort and virtually constant landings. In the past decade it has become obvious to many fishery biologists and economists that conservation of fish stocks is a necessary but not sufficient criterion for fisheries management. Resource managers have become increasingly aware of the interdependence between economic factors and the intensity, location and composition of fishing effort.

Potential population and economic consequences of sublethal injuries in the spiny lobster fishery of the Florida Keys

2007 ◽  
Vol 58 (2) ◽  
pp. 166 ◽  
Author(s):  
D. M. Parsons ◽  
D. B. Eggleston
Keyword(s):  
Spiny Lobster ◽  
Florida Keys ◽  
Fishing Effort ◽  
Economic Consequences ◽  
Economic Losses ◽  
Growth Time ◽  
Potential Population ◽  
Lobster Fishery ◽  
Fishery Interactions ◽  
The Impact

Animals that interact with but are not retained by fishing gears may later die. The population and economic consequences of these sublethal fishery interactions are seldom known but may be significant. In the present study, a population model was used to quantify potential population and economic consequences of injuries that Caribbean spiny lobsters (Panulirus argus) sustain from fishing activities in the Florida Keys, USA. Injuries generated by the fishery are known to reduce growth and elevate mortality. Simulation modelling results indicated that injuries may reduce adult lobster abundance and associated landings by ≥50% in areas with high recreational fishing effort. When simulated injuries were ~20 times lower (representing areas with lower fishing effort), these injuries were only responsible for a 5 and 8% reduction in the adult lobster population and commercial landings respectively. Important parameters within the model (growth, time in stage and mortality of injured lobsters) were altered by ±10% to assess model sensitivity. Final results changed <10% (with the exception of one 15% change), suggesting that model output was relatively insensitive to variation in key parameters. When the impact of sublethal injuries was applied to the entire spiny lobster fishery in the Florida Keys, adult stock biomass and annual commercial landings were reduced by 900 and 160 t (US$1.6 million) respectively. These results suggest that sublethal fishery interactions can lead to high population and economic losses, and highlight the need to incorporate sublethal injuries into stock assessments and economic models.

An Analysis of Temperature Effects on the Inshore Lobster Fishery

1972 ◽  
Vol 29 (8) ◽  
pp. 1221-1225 ◽  
Author(s):  
J. M. Flowers ◽  
S. B. Saila
Keyword(s):  
World War Ii ◽  
Homarus Americanus ◽  
The United States ◽  
Fishing Effort ◽  
Yield Prediction ◽  
World War ◽  
Independent Variables ◽  
The Past ◽  
Summer Temperatures ◽  
Lobster Fishery

In the past, water temperature has been utilized in combination with some measure of fishing effort in the development of economic estimator or predictor equations for the yield of the lobster Homarus americanus. The hypothesis that the inshore lobster fishery in the United States has been overfished since the end of World War II to the point where increases in fishing effort since that time have had only minor effects on the yields was examined. It was shown that suitable yield prediction equations could be developed using only lagged and present temperatures as the independent variables. Comparisons were made of equations developed for the Maine fishery and sections of the Canadian fishery. Further analyses were done comparing equations developed using winter vs. summer temperatures and surface vs. bottom temperatures.

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