scholarly journals Reconstructing Ireland’s marine fisheries catches: 1950-2010

2013 ◽  
Author(s):  
Dana D Miller ◽  
Dirk Zeller
Keyword(s):  
Irish Sea ◽  
Commercial Fishing ◽  
Total Catch ◽  
Marine Fisheries ◽  
International Council ◽  
Northeast Atlantic ◽  
Fishing Vessels ◽  
Catch Reconstruction ◽  
Catch Statistics ◽  
Reported Data

The wasteful practice of discarding catch is one of the major problems associated with European fisheries. Despite this, estimates of discarded catch are not included in the ‘Official Catch Statistics’ database (1905 to present) collected and maintained by the International Council for the Exploration of the Sea (ICES). Furthermore, removals through recreational sea angling and estimates of other forms of unreported landings are often also missing from this dataset. Here, total discarded catch and unreported landings made by Irish commercial fishing vessels, and the total amount of fish caught and retained through Irish sea angling activities within the Northeast Atlantic from 1950 to 2010 have been estimated. Total reconstructed catches were 19.3% and 20.9% higher than the officially recorded total landings as reported by ICES from the Northeast Atlantic, and those estimated as being from within the Irish Exclusive Economic Zone (EEZ), respectively. Discarded catch was proportionately the largest component of the reconstruction, representing 12.7% of the total catch within the Irish EEZ. The Irish catch reconstruction presented here is by no means assumed to represent the complete record of total removals and the authors encourage further efforts to improve upon this attempt. However, considering the current absence of estimated values for discarded catch, recreational removals and other unreported landings from officially and publicly reported data, we feel that our reconstruction provides an improved baseline estimate of more accurate total Irish marine fisheries catch that has not previously been made publicly available.

scholarly journals Reconstructing Ireland’s marine fisheries catches: 1950-2010

2013 ◽  
Author(s):  
Dana D Miller ◽  
Dirk Zeller
Keyword(s):  
Irish Sea ◽  
Commercial Fishing ◽  
Total Catch ◽  
Marine Fisheries ◽  
International Council ◽  
Northeast Atlantic ◽  
Fishing Vessels ◽  
Catch Reconstruction ◽  
Catch Statistics ◽  
Reported Data

The wasteful practice of discarding catch is one of the major problems associated with European fisheries. Despite this, estimates of discarded catch are not included in the ‘Official Catch Statistics’ database (1905 to present) collected and maintained by the International Council for the Exploration of the Sea (ICES). Furthermore, removals through recreational sea angling and estimates of other forms of unreported landings are often also missing from this dataset. Here, total discarded catch and unreported landings made by Irish commercial fishing vessels, and the total amount of fish caught and retained through Irish sea angling activities within the Northeast Atlantic from 1950 to 2010 have been estimated. Total reconstructed catches were 19.3% and 20.9% higher than the officially recorded total landings as reported by ICES from the Northeast Atlantic, and those estimated as being from within the Irish Exclusive Economic Zone (EEZ), respectively. Discarded catch was proportionately the largest component of the reconstruction, representing 12.7% of the total catch within the Irish EEZ. The Irish catch reconstruction presented here is by no means assumed to represent the complete record of total removals and the authors encourage further efforts to improve upon this attempt. However, considering the current absence of estimated values for discarded catch, recreational removals and other unreported landings from officially and publicly reported data, we feel that our reconstruction provides an improved baseline estimate of more accurate total Irish marine fisheries catch that has not previously been made publicly available.

scholarly journals Fully documented fishery: a tool to support a catch quota management system

2011 ◽  
Vol 68 (8) ◽  
pp. 1606-1610 ◽  
Author(s):  
Lotte Kindt-Larsen ◽  
Eskild Kirkegaard ◽  
Jørgen Dalskov
Keyword(s):  
Management System ◽  
Gadus Morhua ◽  
Electronic Monitoring ◽  
Scientific Advice ◽  
Total Catch ◽  
Total Allowable Catch ◽  
International Council ◽  
Fishing Vessels ◽  
Scientific Advisory ◽  
Quota Management

Abstract Kindt-Larsen, L., Kirkegaard, E., and Dalskov, J. 2011. Fully documented fishery: a tool to support a catch quota management system. – ICES Journal of Marine Science, 68: 1606–1610. The Danish Government has proposed a catch quota management system (CQMS) in which fishers are obliged to report their total catches, including discards and landings, and both are counted against the formal total allowable catch (TAC). The success of a CQMS requires appropriate documentation to verify the total catch, the validity of scientific advice, and the implementation of the TACs through national catch quotas. A remote electronic monitoring (EM) system, providing full documentation of fishing operations and catches, was tested on six Danish fishing vessels operating under a CQMS for cod (Gadus morhua). The results showed that the EM system could provide the documentation required to support the CQMS and that it was an incentive for the participating fishers to avoid discarding cod. Changing from landings to total catch quotas would not affect the scientific-advisory processes of the International Council for the Exploration of the Sea (ICES), but it could have notable consequences for the allocation of TACs between countries.

scholarly journals On estimating the age composition of the commercial catch of Northeast Arctic cod from a sample of clusters

2003 ◽  
Vol 60 (2) ◽  
pp. 297-303 ◽  
Author(s):  
Aanes Sondre ◽  
Michael Pennington
Keyword(s):  
Age Structure ◽  
Age Distribution ◽  
Significant Loss ◽  
Effective Sample Size ◽  
Commercial Fishing ◽  
Total Catch ◽  
Intracluster Correlation ◽  
Age Composition ◽  
Commercial Catch ◽  
Arctic Cod

Abstract Assessment of Northeast Arctic cod is based on estimates of the commercial catch in numbers at age. The age structure of the catch is estimated by sampling fish from commercial fishing trips. Although it is commonly assumed that a sample of individuals is a random sample from the population, fish sampled from the same trip (i.e. from a “cluster” of fish) tend to be more similar in age than those in the total catch. For Northeast Arctic cod, the intracluster correlation for age is positive, and therefore the effective sample size is much smaller than the number of fish aged. Given the number of fish aged, the precision of the estimated age distribution is rather low, and the number of fish aged from each trip could be reduced from approximately 85 to 20 without a significant loss in precision.

Feeding habits and trophic level of the smooth hammerhead shark, Sphyrna zygaena (Carcharhiniformes: Sphyrnidae), off Ecuador

2018 ◽  
Vol 99 (3) ◽  
pp. 673-680 ◽  
Author(s):  
Colombo Estupiñán-Montaño ◽  
Luis Cedeño-Figueroa ◽  
José F. Estupiñán-Ortiz ◽  
Felipe Galván-Magaña ◽  
Alejandro Sandoval-Londoño ◽  
...  
Keyword(s):  
Trophic Level ◽  
Feeding Habits ◽  
Trophic Niche ◽  
Commercial Fishing ◽  
Dosidicus Gigas ◽  
Apex Predators ◽  
Marine Food Webs ◽  
Fishing Vessels ◽  
Marine Food ◽  
Index Of Relative Importance

As apex predators, sharks are known to play an important role in marine food webs. Detailed information on their diet and trophic level is however needed to make clear inferences about their role in the ecosystem. A total of 335 stomachs of smooth hammerhead sharks, Sphyrna zygaena, were obtained from commercial fishing vessels operating in the Ecuadorian Pacific between January and December 2004. A total of 53 prey items were found in the stomachs. According to the Index of Relative Importance (%IRI), cephalopods were the main prey (Dosidicus gigas, Sthenoteuthis oualaniensis, Ancistrocheirus lesueurii and Lolliguncula [Loliolopsis] diomedeae). Sphyrna zygaena was thus confirmed to be a teutophagous species. The estimated trophic level of S. zygaena was between 4.6 and 5.1 (mean ± SD: 4.7 ± 0.16; males: 4.7; females: 4.8). Levin's index (BA) was low (overall: 0.07; males: 0.08; females: 0.09), indicating a narrow trophic niche. We found that sharks <150 cm in total length consumed prey of coastal origin, whereas sharks ≥150 cm foraged in oceanic waters and near the continental shelf. The analyses indicate that S. zygaena is a specialized predator consuming mainly squids.

Catch and Release in Marine Recreational Fisheries

2002 ◽  
Keyword(s):  
Commercial Fishing ◽  
Migratory Species ◽  
Science Center ◽  
Fisheries Science ◽  
Atlantic Bluefin Tuna ◽  
Tag Retention ◽  
Catch And Release ◽  
Istiophorus Platypterus ◽  
Makaira Nigricans ◽  
Fishing Vessels

<em>Abstract.</em>—The Cooperative Tagging Center (CTC) of the National Marine Fisheries Service’s Southeast Fisheries Science Center operates one of the largest and oldest fish tagging programs of its type in the world. Since 1954, more than 35,000 recreational and commercial fishing constituents have voluntarily participated in the CTC, and this has resulted in tagging more than 245,000 fish of 123 species. Although some tagging activities have been conducted by scientists, most of the tag release and recovery activities were achieved by recreational and commercial fishery constituents. Five large highly migratory species have historically represented the Program’s primary target species, including Atlantic bluefin tuna <em> Thunnus thynnus</em>, blue marlin <em> Makaira nigricans</em>, white marlin <em> Tetrapturus albidus</em>, sailfish <em> Istiophorus platypterus</em>, and broadbill swordfish <em> Xiphias gladius</em>. Tagging equipment and procedures for catching, tagging, and resuscitation of species too large to be brought aboard fishing vessels have evolved and improved considerably over the years. This paper presents a review of the development of the most efficient tagging, handling, and dehooking techniques used on a variety of large, highly migratory species in the CTC. In addition, the results of a comparative tag retention study on billfish are presented, comparing stainless steel dart tags used for nearly 30 years with a hydroscopic nylon double-barb dart tag, recently developed in conjunction with The Billfish Foundation. Recommendations are made on the best techniques, procedures, and equipment for in-water tagging of large, highly migratory species.

Mitigating Impacts of Natural Hazards on Fishery Ecosystems

2008 ◽  
Keyword(s):  
Natural Hazards ◽  
Large Scale ◽  
Gulf Coast ◽  
Commercial Fishing ◽  
Single Beam ◽  
Coastal Bays ◽  
Fishing Vessels ◽  
Northern Gulf Coast ◽  
Hurricanes Katrina And Rita ◽  
Survey Planning

<em>Abstract</em>.—Hurricanes Katrina and Rita critically impacted the northern Gulf Coast. Shrimping and other commercial fishing industries saw large scale destruction of vessels and shore based facilities in addition to a deposition of large amounts of debris on fishing grounds from Alabama to Louisiana. In 2006, the National Oceanic and Atmospheric Administration’s (NOAA’s) Office of Coast Survey and Office of Response and Restoration started the implementation of a large scale hazards survey program to map the coastal waters of Louisiana, Mississippi, and Alabama. The first phase of the effort involved surveying more than 600 square nautical miles of coastal bays and nearshore waters with sidescan and single beam acoustic sonar. Survey findings are posted each week on a NOAA public Web site displaying the location of each hazard and debris found. The survey work is also updating the NOAA navigation charts for coastal areas that are used heavily by fishing vessels, the navigation industry, and recreational boaters. Survey planning and implementation is conducted cooperatively with the marine fisheries agencies of Alabama, Mississippi, and Louisiana.

MARINE FISHERIES AND SAFETY

Fisheries ◽  
2020 ◽  
Vol 2020 (6) ◽  
pp. 111-113
Author(s):  
Viktor Min'ko
Keyword(s):  
Statistical Data ◽  
Marine Fisheries ◽  
Fishing Vessel ◽  
Fatal Accidents ◽  
Small Vessels ◽  
Fishing Vessels ◽  
Fishing Gears

The problem of choosing a fishing vessel is considered. Statistical data from various countries are presented, confirming the increased level of professional risk for members of the crews of small vessels. A relation that relates the frequency of fatal accidents among fishermen with the displacement of fishing vessels is obtained. The necessity of increasing the level of safety of the solutions used in the design of fishing schemes, fishing equipment and fishing gears is indicated.

Accelerometers: Assessing their potential for measuring personal flotation device use on commercial fishing vessels

2019 ◽  
Vol 62 (10) ◽  
pp. 883-892
Author(s):  
Paul L. Jenkins ◽  
Margaret Knight ◽  
Liane Hirabayashi ◽  
Rebecca Weil ◽  
Jessica Echard ◽  
...  
Keyword(s):  
Commercial Fishing ◽  
Fishing Vessels ◽  
Device Use

scholarly journals Interactions between commercial fishing vessels and a pelagic seabird in the southern Mediterranean Sea

BMC Ecology ◽  
2018 ◽  
Vol 18 (1) ◽  
Author(s):  
M. Cianchetti-Benedetti ◽  
G. Dell’Omo ◽  
T. Russo ◽  
C. Catoni ◽  
P. Quillfeldt
Keyword(s):  
Mediterranean Sea ◽  
Commercial Fishing ◽  
Fishing Vessels ◽  
Southern Mediterranean ◽  
Pelagic Seabird
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