Download or read book Evaluation of a U S West Coast Groundfish Habitat Conservation Regulation Via Analysis of Spatial and Temporal Patterns of Trawl Fishing Efforts written by Marlene A. Bellman and published by . This book was released on 2004 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent emphasis on linkages between essential fish habitat and fish stock productivity has raised concerns about the management of fishing activities such as trawling, which have the potential to impact fish habitat. Knowing specifically where and how intensively trawl effort has occurred over time provides ecologists with the necessary background for habitat impact and recovery studies, and provides fishery managers with an assessment of how habitat conservation objectives are being met. The objectives of this study were to (1) examine the extent to which the 2000 Pacific Fishery Management Council footrope restriction has shifted and reduced trawl fishing effort on Oregon fishing grounds, (2) to relate these changes in distribution to the benthic habitat type over which they occur, and (3) to develop methods for enhancing fine-scale spatial review of targeted fishing effort. Density analysis of available trawl start locations provided a spatial and temporal understanding of how fishing efforts increased and decreased in relation to habitat distribution and fishery management actions between 1995 and 2002. Trawl effort patterns exhibit significant inter-annual variability and patchy distribution. Areas of increased fishing effort were still evident between years, despite an overall decline in trawl tows across the time scale of this study. Tow end point locations for the years 1998-2001 were retrieved from manual logbooks for five reference sites located in the proximity of rock habitat features. Trawl towlines were mapped from start to end point and demonstrated a marked enhancement of fine-scale fishing effort resolution, with increased ability to identify effort shifts over benthic habitat. Distinct spatial shifts in fishing intensity (measured as km towed) away from rock habitat were evident at all reference sites, with an average reduction of 86%. Some slight shifts into surrounding unconsolidated sediments also occurred, indicating effort displacement as well as reduction. Fishing intensity was calculated from commercial trawl and research trawl survey towlines to achieve the most accurate assessment of fishing impacts and potential habitat recovery areas. Research trawling intensity was less than 1% of commercial trawl effort originating from the same sites. A brief comparison of Oregon vessel towlines and California vessel towlines demonstrated similar targeted fishing patterns by both fleets, except at one site. Results indicate that the footrope restriction, in conjunction with associated landing limits, was effective in protecting rocky habitats from trawl fishing impacts. Reference areas were identified where essential fish habitat (EFH) recovery is likely occurring off the coast of Oregon. Substantial regulatory changes continue in this fishery, with trip limits and gear restrictions continuously adjusted. Continued monitoring and review of spatial trawl data would assist in fishery management decision-making and assess conservation objectives for depleted groundfish and associated habitats. Future research should incorporate analysis of catch data and expand the review of trawl towlines for the entire US West coast groundfish fishery. The trawl towline spatial analysis developed in this work is a credible method for reviewing fishing effort at the scale of the fishery and in relation to detailed habitat data. The research presented here provides an example of how an interdisciplinary approach and critical assessment of data can work to resolve marine management challenges.
Download or read book Evaluation of a US West Coast Groundfish Habitat Conservation Regulation Via Analysis of Spatial and Temporal Patterns of Trawl Fishing Effort written by Marlene A. Bellman and published by . This book was released on 2005 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2008 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rationalization of the Pacific Coast Groundfish Limited Entry Trawl Fishery Including Regulatory Impact Review and Initial Regulatory Flexibility Analysis written by and published by . This book was released on 2009 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes to Pacific Coast Groundfish Essential Fish Habitat Conservation Areas and Boundaries of the Trawl Gear Rockfish Conservation Area written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Trawling and Dredging on Seafloor Habitat written by National Research Council and published by National Academies Press. This book was released on 2002-07-09 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Download or read book Changes to Groundfish Essential Fish Habitat Conservation Areas and Boundaries of the Trawl Gear Rockfish Conservation Areas written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Data limited Research in Stock Assessment to Increase the Understanding of Fisheries Resources and Inform and Improve Management Efforts written by Giuseppe Scarcella and published by Frontiers Media SA. This book was released on 2023-04-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trawl Rationalization Trailing Actions written by and published by . This book was released on 2017 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This document provides background information about, and analyses for, regulatory changes affecting the catch share program for the shorebased groundfish trawl fishery (a program that provides individual fishing quotas (IFQ) for the harvest of groundfish delivered to shoreside processors and bycatch of Pacific halibut). The regulatory changes would reallocate widow rockfish quota shares (QS). The proposed action would require an amendment to the regulations implementing the Pacific Coast Groundfish Fishery Management Plan (FMP), and must conform to the Magnuson-Stevens Fishery Conservation and Management Act (MSA)--the principal legal basis for fishery management within the Exclusive Economic Zone (EEZ). The EEZ extends from the outer boundary of the territorial sea at three miles to a distance of 200 nautical miles from shore. In addition to addressing MSA mandates, this document serves as an environmental assessment (EA) covering the impacts of the action alternatives relative to the No Action Alternative, pursuant to the National Environmental Policy Act (NEPA) of 1969, as amended"--Introduction.
Download or read book Fisheries Off West Coast States Pacific Coast Groundfish Fishery Management Plan Trawl Rationalization Program Midwater Trawl Requirements Us National Oceanic and Atmospheric Administration Regulation Noaa 2018 Edition written by The Law Library and published by Independently Published. This book was released on 2019-01-09 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Fisheries off West Coast States - Pacific Coast Groundfish Fishery Management Plan - Trawl Rationalization Program - Midwater Trawl Requirements (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 This final rule clarifies the regulatory requirements for vessels using midwater trawl gear in the Pacific Coast Groundfish Fishery Shorebased Individual Fishing Quota Program. This action is needed to eliminate inconsistencies and reduce confusion in the current regulations. For vessels targeting Pacific whiting, the action clarifies that the retention of prohibited and protected species is allowed until landing. The disposition of prohibited and protected species is specified consistent with the Pacific Coast Groundfish Fishery Management Plan (groundfish FMP), the Pacific Coast Salmon Fishery Management Plan (salmon FMP), and other applicable law. This ebook contains: - The complete text of the Fisheries off West Coast States - Pacific Coast Groundfish Fishery Management Plan - Trawl Rationalization Program - Midwater Trawl Requirements (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book Rationalization of the Pacific Coast Groundfish Limited Entry Trawl Fishery written by and published by . This book was released on 2010 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Pacific Fishery Management Council (Council) proposes changes to its Pacific Coast Groundfish Fishery Management Plan (groundfish FMP) to rationalize Federal management of the Pacific Coast groundfish trawl fishery. This would be accomplished by implementing a limited access privilege (LAP) program and modifying the approach to controlling bycatch of Pacific halibut in the groundfish trawl fishery. LAPs are a form of output control whereby an individual fisherman, community, or other entity is granted the privilege to catch a specified portion of the total allowable catch (TAC). The proposed action (termed "trawl rationalization") is intended, among other things, to increase economic efficiency within the Pacific coast groundfish trawl fishery and reduce the incidental catch of overfished groundfish and possibly Pacific halibut (often referred to as bycatch and defined as fish that are not kept or sold and are discarded, usually at sea). Implementing the action will involve both changes to the management framework in the FMP and promulgation of implementing regulations"--Executive summary (p. iii).
Download or read book Essential Fish Habitat Designation and Minimization of Adverse Impacts Pacific Coast Groundfish Fishery Management Plan written by and published by . This book was released on 2005 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essential Fish Habitat written by EFH Core Team for West Coast Groundfish and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring Spatial and Temporal Patterns in New Zealand Scampi Fisheries Ecology written by Alaric Uamari McCarthy and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: New Zealand scampi (Metanephrops challengeri) is a commercially important species, representing one of New Zealand's most highly valued seafood export products by weight. Despite their economic significance, relatively little is understood of their ecology, and the factors affecting their distribution in comparison to their northern hemisphere counterpart, the Norway lobster (Nephrops norvegicus). This is largely due to the difficulty and expense of gathering data for cryptic deep-sea species such as New Zealand scampi. There remain substantial information gaps in our knowledge with regard to aspects of their habitat ecology, reproductive biology and distribution that are likely to have implications for management and sustainability of the fishery. The research presented in this thesis aims to improve our understanding of patterns of scampi habitat associations, trawl efficiency, maturity, catch distribution and fishing effort to provide insights into the potential for improved fishing efficiency and scampi management. To achieve this aim, the research for this thesis investigated novel aspects of the in-situ biology of New Zealand scampi at a variety of scales, using a combination of field video experimentation, field sampling and analysis of historical catch data. These included: trawl-scale investigations of scampi-habitat associations and the first direct assessments of scampi trawl efficiency using video technology deployed on trawl nets (Chapter 2); assessment of broad-scale patterns in the size at onset of maturity of female scampi and the first estimates of the size at onset of maturity of male scampi (Chapter 3); and the adoption of a range of spatial analyses not previously documented for the New Zealand scampi fishery to investigate drivers of spatial and temporal patterns of commercial fishing effort, catch and catch per unit effort (CPUE), and assess historical catch efficiency of the fleet (Chapter 4). The results of the research suggest a negative relationship between the distribution of scampi burrows (most reliable proxy of scampi abundance) and smooth topography, but a positive relationship with conical mounds (formed by bioturbators) within three fisheries management areas (FMAs) (Chapter 2). These findings indicate that scampi may be patchily distributed over fine scales and potentially predictable in their localised distribution. Scampi trawl efficiency was low, with only 30% of observed scampi passing over the footrope and into the trawl net, indicating that a much lower proportion of emerged scampi are caught during trawling than previously assumed. Catching success decreased further over rough topography (27%), with the presence of conical mounds (23%), and when scampi were partially in their burrows (10%) (Chapter 2). Estimates of the size at onset of maturity for female scampi increased with latitude among FMAs and corresponded with decreases in both water temperature and scampi density. The results also indicate that gonadal widening (morphological maturation) and early-stage gonad maturation (physiological maturation) occurs prior to the bearing of eggs (Chapter 3). Finally, trends in spatial variations of scampi fishing effort and catch within FMAs coincided with changes in fisheries management strategies and were likely influenced by fishers avoiding moulting seasons and strategically targeting larger sized scampi in shallower but less scampi-dense areas. An observed disconnect between the spatial allocation of fishing effort and spatial patterns of CPUE may signal catch inefficiencies and sub-optimal fishing of the scampi fleet (Chapter 4). Collectively, these findings of the research presented in this thesis have the potential to help inform more targeted and sustainable fishing practices, whilst also identifying regional differences in scampi reproductive potential and fishing susceptibility and contribute to more robust stock assessments.
Download or read book Using Oregon Trawl Logbooks to Study Spatial and Temporal Characteristics of Commercial Groundfish Species Associations written by Yong Woo Lee and published by . This book was released on 1997 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Species associations of fifteen major commercial groundfish species in the northeastern Pacific ocean and their spatial and temporal characteristics were studied using Oregon bottom trawl logbook data, 1987 to 1993. Screening procedures were used to remove questionable data from the original logbook files, which resulted in the exclusion of information from 46% of the total available tows. Two multivariate methods, detrended correspondence analysis (DCA) and Ward's method of hierarchical cluster analysis were used to derive the association patterns of species and species groups. A general linear model that was developed for the primary DCA axis suggested that the species associations are strongly correlated with depth, but minimally correlated with the other environmental variables that were examined (latitude, season, and year). The weak correlations between DCA axis 1 and the temporal variables indicate that species associations in the study region are fairly persistent over time. The same multivariate techniques were used to examine possible sampling effects due to changes in the participating trawl vessels that contributed logbook information. Depth and latitudinal distributions of species occurrence in the logbook were similar to distributions derived from National Marine Fishery Service triennial bottom trawl survey. However, the analysis also showed that the depth coverage by the survey is not broad enough to accurately characterize associations among species that are currently subject to commercial fishing activity.
Download or read book Fisheries Off West Coast States Pacific Coast Groundfish Fishery Management Plan Amendments 20 and 21 Trawl Rationalization Program Us National written by The Law Library and published by Independently Published. This book was released on 2019-01-08 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Law Library presents the complete text of the Fisheries off West Coast States - Pacific Coast Groundfish Fishery Management Plan - Amendments 20 and 21 - Trawl Rationalization Program (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition). Updated as of May 29, 2018 NMFS is implementing Amendments 20 and 21 to the Pacific Coast Groundfish Fishery Management Plan (FMP), which were partially approved by the Secretary on August 9, 2010. Amendment 20 establishes a trawl rationalization program for the Pacific Coast groundfish fishery. Amendment 20's trawl rationalization program consists of: an individual fishing quota (IFQ) program for the shorebased trawl fleet (including whiting and non-whiting sectors); and cooperative (coop) programs for the at-sea (whiting only) mothership and catcher/processor trawl fleets. The trawl rationalization program is intended to increase net economic benefits, create individual economic stability, provide full utilization of the trawl sector allocation, consider environmental impacts, and achieve individual accountability of catch and bycatch. Amendment 21 establishes fixed allocations for limited entry trawl participants. These allocations are intended to improve management under the rationalization program by streamlining its administration, providing stability to the fishery, and addressing halibut bycatch. This rule finalizes only certain key components necessary for issuance of permits and endorsements in time for use in the 2011 fishery and in order to have the 2011 specifications reflect the new allocation scheme. Specifically, this rule establishes the allocations set forth under Amendment 21 and establishes procedures for initial issuance of permits, endorsements, quota shares (QS), and catch history assignments under the IFQ and coop programs. In addition, this rule restructures the entire Pacific Coast groundfish regulations to more closely track the organization of the proposed management measures and to make the total groundfish regulations more clear. This ebook contains: - The complete text of the Fisheries off West Coast States - Pacific Coast Groundfish Fishery Management Plan - Amendments 20 and 21 - Trawl Rationalization Program (US National Oceanic and Atmospheric Administration Regulation) (NOAA) (2018 Edition) - A dynamic table of content linking to each section - A table of contents in introduction presenting a general overview of the structure
Download or read book Amendment 94 to the Fishery Management Plan for Groundfish of the Bering Sea and Aleutian Islands Management Area to Require Trawl Sweep Modification in the Bering Sea Flatfish Fishery Establish a Modified Gear Trawl Zone and Revise Boundaries of the Northern Bering Sea Research Area and Saint Matthew Island Habitat Conservation Area written by and published by . This book was released on 2010 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This Environmental Assessment/Regulatory Impact Review/Final Regulatory Flexibility Analysis analyzes Amendment 94 to the Fishery Management Plan for Groundfish of the Bering Sea and Aleutian Islands Management Area (FMP) and gear modification for nonpelagic trawl vessels targeting flatfish in the Bering Sea subarea. The regulations require elevating devices on trawl sweeps to raise them off the seafloor and to reduce the potential impact on bottom habitat. The action follows from Amendment 89, Bering Sea Habitat Conservation Measures. This analysis also evaluates changes to the southern boundary of the Northern Bering Sea Research Area to create an area (Modified Gear Trawl Zone), wherein anyone fishing with nonpelagic trawl gear must use modified trawl sweeps and evaluates changes to the eastern boundary of the Saint Matthew Island Habitat Conservation Area to be consistent with the Council's intent to protect blue king crab habitat. Finally, the document addresses certain housekeeping amendments to the FMP, which are required to correct typographical and non-substantive errors and to ensure consistency with the Magnuson-Stevens Fishery Conservation and Management Act"--Abstract (p. [1]).
