Fishing Methods And Fishing Fleets

2001 ◽  
pp. 1035-1048 ◽  
Author(s):  
R. Fonteyne
Keyword(s):  
Fishing Fleets

ANALISIS BIOEKONOMI PERIKANAN TUNA SIRIP KUNING DI LARANTUKA, KABUPATEN FLORES TIMUR, INDONESIA

2020 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Pratita Budi Utami ◽  
Tridoyo Kusumastanto ◽  
Nimmi Zulbainarni ◽  
Nisa Ayunda
Keyword(s):  
Local Community ◽  
International Markets ◽  
Yellowfin Tuna ◽  
Regional Government ◽  
Economic Rent ◽  
High Demand ◽  
Maximum Economic Yield ◽  
Fish Exploitation ◽  
Fishing Fleets ◽  
Tuna Fisheries

Tingginya permintaan tuna sirip kuning baik dalam memenuhi kebutuhan pasar mancanegara dan pasar lokal, berdampak pada keberlanjutan perikanan tuna tersebut. Wilayah perairan Flores Timur adalah salah satu lokasi migrasi bagi tuna sirip kuning; Kecamatan Larantuka merupakan tempat pendaratan terpenting bagi nelayan lokal handline tuna sirip kuning. Kegiatan perikanan tuna sirip kuning ini merupakan salah satu pendapatan utama bagi nelayan lokal dan pemerintah daerah setempat. Penelitian ini bertujuan untuk mengestimasi tingkat eksploitasi dan menganalisa rezim pemanfaatan dari perikanan handline tuna sirip kuning di Larantuka, Flores Timur. Model bioekonomi Fox dan Copes digunakan dalam penelitian untuk menganalisa tingkat lestari sumber daya tuna ekor kuning dari pendekatan input dan output. Hasil estimasi dari kedua model menunjukkan bahwa tingkat pemanfaatan sumber daya ikan tuna sirip kuning oleh nelayan lokal handline masih dalam zona lestari secara ekonomi dan ekologi. Maximum economic yield (MEY) merupakan strategi terbaik untuk mengelola keberlanjutan perikanan tuna sirip kuning di perairan Flores Timur. Melalui pengelolaan rezim MEY diperkirakan dapat menyerap tenaga kerja lebih dari 30 orang, peningkatan armada alat penangkapan sebanyak 25 unit dan pemasukan keuntungan secara ekonomi sebesar Rp68.123.060.000,00 per tahun.Title: Bioeconomic Analysis of Yellowfin Tuna Fishery in Larantuka of East Flores Regency, Indonesia The high demand for yellowfin tuna both in national and international markets has a consequence to the fish resources sustainability. Eastern Flores water is a major area of this tuna mobility; the district of Larantuka is the central port for local yellowfin tuna handline fisheries. These activities are substantial incomes for the local community and regional government. This study, therefore, aims to calculate fish exploitation level and to analyze appropriate management for yellowfin tuna fisheries in Larantuka, East Flores. The bioeconomics Fox and Copes models are used to evaluating the optimal fisheries from input and output approaches. The models’ applications demonstrated that yellowfin tuna handline fisheries are currently estimated sustainable both in ecology and economics. During the study period, the maximum economic yield (MEY) is a recommended strategy to manage yellowfin tuna fisheries in Larantuka, Eastern Flores. The strategy contributes to increasing the number of workers about 30 people, the number of fishing fleets about 25 units and reaching the economic rent  IDR 68.123.060.000,00 in a year

Problems Confronting Fishing Industries Relative to Management Policies Adopted by Governments

1973 ◽  
Vol 30 (12) ◽  
pp. 2486-2489
Author(s):  
G. H. Elliot
Keyword(s):  
Fisheries Management ◽  
International Level ◽  
Full Understanding ◽  
Alternative Management ◽  
Fishery Resources ◽  
International Action ◽  
The Future ◽  
Future Viability ◽  
Management Policies ◽  
Fishing Fleets

With increase in numbers, size, and effectiveness, fishing fleets have depleted important stocks of fish, and strong international action by governments is imperative for the future viability of fishery resources. The author favors a system of an overall quota of fish, with individual quotas for boats and plants, and predicts that this will become "the accepted method of running fisheries" in 20 years. He discusses how best to organize such a system, with full consultation between governments and their national fishing industries as well as at the international level. For efficient handling of the complex issues involved and a full understanding of them, he suggests that governments should appoint to their fisheries ministries officers who have specialized in fisheries management and are able to analyze the situation in depth and advise the administrators on the implications of alternative management policies. The controls over fishing that he advocates are essential because "free fish means eventually no fish."

scholarly journals A multidisciplinary approach to the spatial dimension in ecosystem-based fisheries management

2018 ◽  
Vol 31 ◽  
pp. 23 ◽  
Author(s):  
Pascal Le Floc'h ◽  
Michel Bertignac ◽  
Olivier Curtil ◽  
Claire Macher ◽  
Emilie Mariat-Roy ◽  
...  
Keyword(s):  
Multidisciplinary Approach ◽  
Spatial Scales ◽  
Spatial Dimension ◽  
Common Denominator ◽  
Bay Of Biscay ◽  
First Case ◽  
Fishing Fleets ◽  
Coastal Space ◽  
Fish Habitats

This study considers how to reconcile different spatial scales to find the best common denominator to be used as an ecosystem-based management unit. For this, two fishery production zones differing ecologically, economically, legally and institutionally were investigated. The first case study is located within French territorial waters, in a MPA created in 2007- the Parc Naturel Marin d'Iroise (PNMI). The second case study, the Bay of Biscay, covers both territorial waters and the French exclusive economic zone. The paper adopts a multidisciplinary approach. Relevant questions concern how marine space is shared between exploited species and fishing fleets, especially the spatial mobility strategies they employ. An assessment of the institutional system established for the PNMI contributes to the discussion of changes in coastal space use. It is obvious that the area in need of protection, defined on the basis of essential fish habitats, does not solely concern the fisheries located within the coastal zone. Experiments conducted by scientists and professionals in the Bay of Biscay provide other key points for the discussion in terms of what institutional frameworks to promote.

scholarly journals Climate driven spatiotemporal variations in seabird bycatch hotspots and implications for seabird bycatch mitigation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rujia Bi ◽  
Yan Jiao ◽  
Joan A. Browder
Keyword(s):  
Gulf Stream ◽  
Spatiotemporal Patterns ◽  
Seabird Species ◽  
Advanced Planning ◽  
Physical Barriers ◽  
Pelagic Longline Fishery ◽  
Bayesian Approximation ◽  
Fishing Fleets ◽  
North Wall ◽  
National Marine Fisheries Service

AbstractBycatch in fisheries is a major threat to many seabird species. Understanding and predicting spatiotemporal changes in seabird bycatch from fisheries might be the key to mitigation. Inter-annual spatiotemporal patterns are evident in seabird bycatch of the U.S. Atlantic pelagic longline fishery monitored by the National Marine Fisheries Service Pelagic Observer Program (POP) since 1992. A newly developed fast computing Bayesian approximation method provided the opportunity to use POP data to understand spatiotemporal patterns, including temporal changes in location of seabird bycatch hotspots. A Bayesian model was developed to capture the inherent spatiotemporal structure in seabird bycatch and reduce the bias caused by physical barriers such as coastlines. The model was applied to the logbook data to estimate seabird bycatch for each longline set, and the mid-Atlantic bight and northeast coast were the fishing areas with the highest fleet bycatch estimate. Inter-annual changes in predicted bycatch hotspots were correlated with Gulf Stream meanders, suggesting that predictable patterns in Gulf Stream meanders could enable advanced planning of fishing fleet schedules and areas of operation. The greater the Gulf Stream North Wall index, the more northerly the seabird bycatch hotspot two years later. A simulation study suggested that switching fishing fleets from the hindcasted actual bycatch hotspot to neighboring areas and/or different periods could be an efficient strategy to decrease seabird bycatch while largely maintaining fishers’ benefit.

scholarly journals Variation in fisher skill is a major determinant of bycatch rates across species, gears, and fisheries

2021 ◽  
Author(s):  
Leslie Roberson ◽  
Chris Wilcox
Keyword(s):  
Threatened Species ◽  
Marine Mammals ◽  
Sea Turtles ◽  
Fishing Effort ◽  
Control Measures ◽  
Target Species ◽  
Marine Animals ◽  
Total Allowable Catch ◽  
Fishing Vessels ◽  
Fishing Fleets

Abstract Fisheries bycatch continues to drive the decline of many threatened marine species such as seabirds, sharks, marine mammals, and sea turtles. Management frameworks typically address bycatch with fleet-level controls on fishing. Yet, individual operators differ in their fishing practices and efficiency at catching fish. If operators have differing abilities to target species, they should also have differing abilities to anti-target bycatch species. We analyse variations in threatened species bycatch among individual operators from five industrial fisheries representing different geographic areas, gear types, and target species. The individual vessel is a significant predictor of bycatch for 15 of the 16 species-fishery interactions, including species that represent high or low costs to fishers, or have economic value as potentially targeted byproducts. Encouragingly, we found high performance operators in all five fishing sectors, including gears known for high bycatch mortality globally. These results show the potential to reduce negative environmental impacts of fisheries with incentive-based interventions targeting specific performance groups of individuals. Management of threatened species bycatch Incidental catch of marine animals in fishing gear ("bycatch") has been recognized as a serious problem for several decades. Despite widespread efforts to address it, bycatch remains one of the most pressing issues in fisheries management today, especially for threatened or protected species such as sea turtles, seabirds, elasmobranchs, and marine mammals1,2. The most common approaches to reducing bycatch have been command-and-control measures implemented across the entire fleet or industry, such as technology requirements or total allowable catch for particular bycatch species3,4. These conventional approaches have been far from universally successful, and have often performed worse in practice than models and trials suggested, even when the same approach is translated to a similar fishery5. The Skipper Effect Managing bycatch is a problem of fishing efficiency. Although management frameworks typically treat fishing fleets as a unit, several studies suggest that the skill of individual operators (the "skipper effect") could be a driver of important and unexplained variations in fishing efficiency. A skipper's skill is some combination of managerial ability, experience and knowledge of the environment, ability to respond to rapidly changing information and conditions at sea, and numerous other factors that are difficult to describe or record6. There is ongoing debate about the key components of operator skill and its importance in different contexts, such as different gears or technical advancement of fisheries7–10. Yet, numerous studies show consistent variation in target catch rates among anglers, skippers, or fishing vessels that is not explained by environmental variables or economic inputs7,11−13. This includes technically advanced and homogeneous fleets where a skipper's skill would seemingly be less important14. Previously, the skipper effect has been explored in relation to fishing efficiency and profitability (effort and target catch). However, if fishers have differing abilities to catch species they want, it follows that they would also have variable skill at avoiding unwanted species. Untangling the skipper effect is difficult without very detailed data, which are often not available for target catch and are extremely rare for bycatch. We capitalize on a rare opportunity to compare multiple high-resolution fisheries datasets that have information about both target and bycatch. We use fisheries observer data from five Australian Commonwealth fisheries sectors to answer three key questions: 1) Is there significant and predictable variation among operators in their target to bycatch ratios? We hypothesize that there are characteristics at the operator level that lead some vessels to perform worse than others on a consistent basis, and that operator skill is an important factor driving variations in bycatch across fishing fleets; 2) Does the pattern hold across species, gear types, and fisheries? We predict that, irrespective of the bycatch context, there are high performing operators that are able to avoid bycatch while maintaining high target catch; and 3) Does skipper skill transfer across species?” We posit that certain types of bycatch are inherently more difficult to avoid but expect to find correlations between bycatch rates, indicating that a skipper's ability to avoid one species extends to other types of bycatch. If these hypotheses hold true, then there exists untapped potential to reduce bycatch without imposing additional controls on fishing effort and gear. This would support an alternative approach to framing management questions such as those around threatened species bycatch. It may be that it is not a random event across a fishery, but in fact is an issue of particular low performance operators. In this case, measures aimed directly at those individual operators could be an opportunity to make considerable progress towards reducing threatened species bycatch, at potentially much lower cost than common whole-of-fishery solutions.

scholarly journals PERBANDINGAN KAPAL MONOHULL, CATAMARAN, TRIMARAN BERDASARKAN TINJAUAN OPERASIONAL PENGGUNAAN BAHAN BAKAR

2021 ◽  
Vol 4 ◽  
pp. 30-36
Author(s):  
Jacobus Tupan ◽  
Richard Benny Luhulima
Keyword(s):  
Data Analysis ◽  
Energy Requirements ◽  
Energy Usage ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Initial Stage ◽  
Transverse Stability ◽  
Fishing Fleets

In general, fishing fleets operating in Maluku waters and managed by local entrepreneurs consist of monohull and trimaran fishing vessels with outriggers. Monohull fishing vessels have limited deck space and poor transverse stability, while trimaran-type vessels have better deck space and transverse stability than monohull vessels, but because they are still in the form of outriggers, the space is limited. This study aims to examine the development of the trimaran fishing vessel in terms of energy requirements, safety, and comfort of the crew during fishing operations. The initial stage of this research begins with data analysis and the basic size of monohull fishing vessels operating in Maluku waters, from this data the shape of the trimaran hull is designed. Calculation of resistance using CFD, then analyzed the calculation of resistance and stability, safety, and comfort of the ship using Maxsurf. The drag Trimaran is 8.86% smaller than a monohull and 3.25% smaller than a catamaran. Energy Usage (EHP) is proven by trimaran ships more than other ship modes. The average trimaran period is 10.5 seconds which meets IMO standards and is declared operationally good.

scholarly journals medieval fisheries of Galicia (Northwestern Iberia): A preliminary archaeozoological overview

Archaeofauna ◽  
2021 ◽  
Vol 30 ◽  
pp. 155-165
Author(s):  
EUFRASIA ROSELLÓ-IZQUIERDO ◽  
EDUARDO GONZÁLEZ-GÓMEZ DE AGÜERO ◽  
CARLOS FERNÁNDEZ-RODRÍGUEZ ◽  
LAURA LLORENTE-RODRÍGUEZ ◽  
ARTURO MORALES-MUÑIZ
Keyword(s):  
Middle Ages ◽  
Iron Age ◽  
Fish Assemblages ◽  
Late Iron Age ◽  
Late Middle Ages ◽  
Critical Issues ◽  
Fish Remains ◽  
Coastal Deposits ◽  
Fishing Fleets ◽  
Two Kingdoms

The origin and development of the Iberian Medieval fisheries is a poorly documented phenomenon both from the standpoint of historical (documentary) and material (archaeological) evidence. Such dearth of knowledge can be explained in terms of proximal (i.e., a deficient retrieval of fish remains) and ultimate causes. Among the latter, the Muslim invasion, that lasted ca. 800 years of the “medieval millennium” in the Iberian Peninsula, needs to be taken into account as it probably delayed the development of fishing fleets within the Christian kingdoms for a substantial period of time. Be it as it may, the lack of knowledge does not allow one to explore a range of critical issues of Spanish and Portuguese history, such as the role played by the ever-expanding fishing fleets of Portugal and Castilla in the process of maritime discovery and colonization that these two kingdoms fostered by the end of the Middle Ages. In this paper, the results from a comparative analysis of selected fish assemblages from primary (i.e. coastal) deposits of the northern Iberian shores are presented. The aim is to check whether changes can be documented both at the level of (1) the range of species occurring in sites from the late Iron Age (Castreña culture, IV-I BC) to the Late Middle Ages (XV AD), and (2) the skeletal spectra of certain species that could reveal a differential processing of taxa meant for local consumption and those that appear in inland sites.

scholarly journals Dictionary-Based Method for Fishing Gear Pattern Detection

10.29007/npz9 ◽  
2019 ◽  
Author(s):  
Ramón Aranda ◽  
Hugo Carlos
Keyword(s):  
Coastal Communities ◽  
Pattern Detection ◽  
Upper Paleolithic ◽  
Fishing Gear ◽  
Fish Stocks ◽  
Iuu Fishing ◽  
Marine Habitats ◽  
Automatic Information ◽  
Fishing Fleets ◽  
Unregulated Fishing

Fishing is an ancient practice that dates back to at least the beginning of the Upper Paleolithic period about 40,000 years ago. Nowadays, Fishing is one of the most important activities, as it provides a source of food and economic income worldwide. A key challenge in ecology and conservation is to decrease the Illegal, Unreported and Unregulated fishing (IUU). IUU fishing depletes fish stocks, destroys marine habitats, distorts competition, puts honest fishers at an unfair disadvantage, and weakens coastal communities, particularly in developing countries. One strategy to decrease the IUU fishing is monitoring and detecting the fishing vessel behaviors. Satellite–based Automatic Information Systems (S– AIS) are now commonly installed on most ocean–going vessels and have been proposed as a novel tool to explore the movements of fishing fleets in near real time. In this article, we present a dictionary–based method to classify, by using AIS data, between two fishing gear types: trawl and purse seine. The data was obtained from Global Fishing Watch. Our experiments show that our proposal has a good performance in classifying fishing behaviors, which could help to prevent overexploit and improve the strategies of the fisheries management.

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