When Conventional Fisheries Management Fails to Reduce the Catch and Discard of Juvenile Fish: A Case Study of the Argentine Hake Trawl Fishery in San Matías Gulf

2010 ◽  
Vol 30 (3) ◽  
pp. 702-712 ◽  
Author(s):  
M. Alejandra Romero ◽  
Raúl A. González ◽  
Matías Ocampo-Reinaldo
Keyword(s):  
Fisheries Management ◽  
Juvenile Fish ◽  
Trawl Fishery ◽  
Argentine Hake

Assessing broad life cycle impacts of daily onboard decision-making, annual strategic planning, and fisheries management in a northeast Atlantic trawl fishery

2015 ◽  
Vol 23 (7) ◽  
pp. 1357-1367 ◽  
Author(s):  
Friederike Ziegler ◽  
Evelyne A. Groen ◽  
Sara Hornborg ◽  
Eddie A. M. Bokkers ◽  
Kine M. Karlsen ◽  
...  
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Strategic Planning ◽  
Fisheries Management ◽  
Northeast Atlantic ◽  
Trawl Fishery

scholarly journals A Case Study in Connecting Fisheries Management Challenges With Models and Analysis to Support Ecosystem-Based Management in the California Current Ecosystem

2021 ◽  
Vol 8 ◽  
Author(s):  
Desiree Tommasi ◽  
Yvonne deReynier ◽  
Howard Townsend ◽  
Chris J. Harvey ◽  
William H. Satterthwaite ◽  
...  
Keyword(s):  
Fisheries Management ◽  
West Coast ◽  
California Current ◽  
Fishing Communities ◽  
Target Species ◽  
Ecosystem Models ◽  
Protected Species ◽  
Forage Species ◽  
The U.S

One of the significant challenges to using information and ideas generated through ecosystem models and analyses for ecosystem-based fisheries management is the disconnect between modeling and management needs. Here we present a case study from the U.S. West Coast, the stakeholder review of NOAA’s annual ecosystem status report for the California Current Ecosystem established by the Pacific Fisheries Management Council’s Fisheries Ecosystem Plan, showcasing a process to identify management priorities that require information from ecosystem models and analyses. We then assess potential ecosystem models and analyses that could help address the identified policy concerns. We screened stakeholder comments and found 17 comments highlighting the need for ecosystem-level synthesis. Policy needs for ecosystem science included: (1) assessment of how the environment affects productivity of target species to improve forecasts of biomass and reference points required for setting harvest limits, (2) assessment of shifts in the spatial distribution of target stocks and protected species to anticipate changes in availability and the potential for interactions between target and protected species, (3) identification of trophic interactions to better assess tradeoffs in the management of forage species between the diet needs of dependent predators, the resilience of fishing communities, and maintenance of the forage species themselves, and (4) synthesis of how the environment affects efficiency and profitability in fishing communities, either directly via extreme events (e.g., storms) or indirectly via climate-driven changes in target species availability. We conclude by exemplifying an existing management process established on the U.S. West Coast that could be used to enable the structured, iterative, and interactive communication between managers, stakeholders, and modelers that is key to refining existing ecosystem models and analyses for management use.

The Potential for Historical Studies of Fisheries in Australia and New Zealand

2001 ◽  
pp. 181-206 ◽  
Author(s):  
Malcolm Tull ◽  
Tom Polacheck
Keyword(s):  
New Zealand ◽  
Primary Sources ◽  
Commercial Fishing ◽  
Secondary Literature ◽  
Trawl Fishery ◽  
Small Family ◽  
The Impact

Malcolm Tull, Tom Polacheck, and Neil Klaer examine the primary sources - particularly printed statistical sources - and secondary literature in order to understand the impact of commercial fishing and harvesting of fish across Australia and New Zealand - including a case study of the multi-species Southeast Australain Trawl Fishery. The authors note that fisheries in Australia and New Zealand have historically been managed by small, family operations, so the records pertining to them are sparse. As a result, most of the records in this chapter come from governmental sources - such as reports and inquiries into Australasian fisheries.

scholarly journals Use of avoidance behaviours to reduce the economic impacts of the EU Landing Obligation: the case study of a mixed trawl fishery

2019 ◽  
Vol 76 (6) ◽  
pp. 1554-1566
Author(s):  
Fabien Pointin ◽  
Fabienne Daurès ◽  
Marie-Joëlle Rochet
Keyword(s):  
Temporal Distribution ◽  
Grid Method ◽  
Fishing Effort ◽  
Economic Losses ◽  
Otter Trawl ◽  
Trawl Fishery ◽  
Nested Grid ◽  
Fishing Practices ◽  
The Eu

Abstract The EU Landing Obligation (LO) is designed to reduce bycatch (i.e. unwanted catch) through more selective fishing practices, such as avoidance behaviours which consist in allocating fishing effort to other species, fishing grounds or seasons. Incentives for fishers to change their behaviours depend on their economic performances as well as their ability to avoid bycatch. Changes in economic performances under the LO are evaluated based on cost and revenue equations. The nested grid method is then used to explore the spatial and temporal distribution of landings and discards, and to suggest alternative effort allocation to avoid bycatch. This article is focussed specifically on the French otter trawl fishery in the eastern English Channel and southern North Sea. Results suggest that under the LO the choke species problem will curtail fishing activities earlier in the year, leading to significant economic losses. In the absence of significant quota top-ups (at least 75%), a change in fishing practices consisting in reducing overall bycatch by 30% is insufficient to reduce losses. With a particular attention to choke species, more economically efficient avoidance strategies can be found thanks to the nested grid method.

Presence-Absence Sampling for Fisheries Management

1990 ◽  
Vol 47 (10) ◽  
pp. 1875-1887 ◽  
Author(s):  
Marc Mangel ◽  
Paul E. Smith
Keyword(s):  
Fisheries Management ◽  
Habitat Structure ◽  
Egg Production ◽  
Fish Stock ◽  
Search Process ◽  
Pelagic Species ◽  
Alternative Method ◽  
Probabilistic Description ◽  
Spawning Biomass

It is often important to estimate the abundance of a fish stock when the stock is somewhat depleted. For pelagic species this presents great operational difficulties, because adult surveys may be prohibitively expensive and time consuming. Here we introduce a method for estimating the spawning biomass of a stock by means of egg or larval surveys. In particular, we develop a series of models for presence-absence sampling of eggs or larvae and show how presence-absence data can be used to estimate adult spawning biomass. The models are based on an underlying probabilistic description of the aggregation of eggs or larvae, a search process, and a description of habitat structure. Methodologies are given for estimating the distribution of the size of the spawning biomass from presence-absence data. A case study of sardine is used to justify a number of the assumptions. The methods are applied to a 1985 survey for sardine eggs and are compared to an alternative method based on egg production.

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