Fishing Gears Research Papers - Academia.edu (original) (raw)

Commercial Fishing & Ocean Plastic Pollution

This study examined the feasibility of gear substitution as a means to reduce bycatch and habitat impacts of fisheries, using a social-ecological systems approach. The U.S. west coast sablefish fishery is an excellent subject for this... more

This study examined the feasibility of gear substitution as a means to reduce bycatch and habitat impacts of fisheries, using a social-ecological systems approach. The U.S. west coast sablefish fishery is an excellent subject for this study, because it permits three different gear types and has a problem with bycatch of overfished species. Bycatch rates were highest in trawls and lowest in pots. Combining interview data with findings from a previous study, affirmed that habitat impacts were highest with trawls and lowest with longlines. Interviews with 44 individuals analyzed using grounded theory yielded several common themes in the opinions of gear substitution. Positive opinion themes included that it would allow better management of the fish populations by reducing bycatch and would allow more business options, flexibility, and increased profit for some trawlers. The main negative opinion theme was that gear substitution could decrease landings needed to support shoreside infrastructure. Most stakeholder groups saw some benefit in gear substitution. Notably, the trawlers voiced a unanimous preference for converting to pots rather than longlines. A scenario analysis revealed that the preferable management option would be long-term gear conversion, but incentives are likely to be an important means of encouraging gear conversion. This ecological impacts rapid assessment provided a regional assessment of bycatch and habitat impacts that had never been conducted before for these gear types. It also provided scientific support for a regulatory change that legally allows trawlers to practice gear substitution.

The Rabnabad is a marine channel, harbor of plentiful aquatic resources, situated at southern district of Patuakhali in Bangladesh. An investigation has been carried out on three different selected spots (S 1 , S 2 and S 3) of Rabnabad... more

The Rabnabad is a marine channel, harbor of plentiful aquatic resources, situated at southern district of Patuakhali in Bangladesh. An investigation has been carried out on three different selected spots (S 1 , S 2 and S 3) of Rabnabad channel to identify fishing gears used for fishing and their potential effects on available fisheries diversity for a period of 8 months from February 2015 to September 2015, employing a prepared questionnaire. The study explored total 21 fishing gears under 8 major groups of net. In total, 54 species of fishes were identified belongs to 10 orders and 27 families in the catches of these gears. The order basis percentage analysis of the fish species executed the highest occurrence belongs to the order Perciformes (31.48%) and lowest for five ordersviz., Aulopiformes, Beloniformes, Osteoglossiformes, Pleuronectiformes and Tetraodontiformes were found in the percentage as 1.85% (for each) of the total fish community. Out of 54 species, 7, 2 and 7 species was recorded as endangered, critically endangered and vulnerable, respectively. Calculated Shannon-Weiner index (H), Gibson's evenness (E), Simpson's dominance index (D), Simpson's index of diversity (1-D) and Margalef's index (d) of fishes ranges between 3.22-3.30, 0.54-0.59, 0.04-0.05, 0.95-0.96 and 5.67-6.10, respectively. It is worse that numerous non-selective and restricted fishing gears are used which lead to unsorted catches, consequently, diversity of fish fauna are decreasing from the channel. For sustainability of these resources, proper management and conservation is crucial to guard the species diversity.

Fishing hooks stand out among the simplest and the oldest of such devices. They are not well studied, and the available studies are out dated due to emergence of new models materials and technologies. Methods of numbering of hooks are not... more

Fishing hooks stand out among the simplest and the oldest of such devices. They are not well
studied, and the available studies are out dated due to emergence of new models materials and
technologies. Methods of numbering of hooks are not standardized. This review dwells into their
history and evolution, terminology, properties, classification, numbering, testing procedure and
hooking efficiency. The study points to the need for a comparative study of hooks in terms of their
relative properties and also as a conservation tool for sustainable development of recreational fishing.

Sommeren 2016 var det regulerte Nøklevann kraftig neddemmet som et ledd i reparasjonsarbeider på demningen ved Rustadsaga, en av hovedinnfartsårene til Østmarka. I den anledning ble det fra turgåere meldt inn funn av trekonstruksjoner i... more

Sommeren 2016 var det regulerte Nøklevann kraftig neddemmet som et
ledd i reparasjonsarbeider på demningen ved Rustadsaga, en av hovedinnfartsårene til Østmarka. I den anledning ble det fra turgåere meldt inn funn av trekonstruksjoner i strandkanten. På bakgrunn av funnmeldingen fikk NMM i samarbeid med Byantikvaren i Oslo muligheten til å gjøre en rask overflateregistrering av de neddemmede breddene av vannet den 19. mai 2016. I løpet av dagen ble hele strandsonen rundt Nøklevann visuelt undersøkt, og det ble påvist tre skipsfunn, en rekke kattiser , steinrøyser, klopper og en struktur som kan være del av et veianlegg.

This report is a summary of the work carried out by the Lukasiewicz - Institute of Logistics and Warehousing under the Marelitt Baltic project. The introduction to the research conducted in the Laboratory of Identification Technologies of... more

This report is a summary of the work carried out by the Lukasiewicz -
Institute of Logistics and Warehousing under the Marelitt Baltic project. The introduction to the research conducted in the Laboratory of Identification Technologies of the Institute is a description of fishing gears used on the Baltic Sea and introduction to radio identification technologies (RFID). As part of the project, the Institute dealt with eveloping a solution that would allow marking all fishing gears available and used on the Baltic Sea. In the course of the works, ready-made solutions on the market were verified, enabling the marking of gears used in difficult conditions (up to 100 m below sea level) in connection with existing net elements (floats of different types and sizes), however their cost had a significant impact on the price of fishing gears. As a result of these arrangements, in consultation with project partners
and experts cooperating with the project team, Identification Technology
Laboratory committed to develop prototypes enabling mass marking of
fishing gears while maintaining a low cost of this solution. In further
laboratory work, the aforementioned prototypes were developed (both 3D projects as well as physical implementations of these projects using various techniques - 3D printing or polyurethane foam molding). Prepared prototypes were then subjected to laboratory tests and after their positive results, also sea trials, in real environment and most importantly in real fishing processes (both with the use of gillnets and trawl nets). The obtained results confirmed the resistance of prototypes to unfavorable working conditions and the possibility of keeping inventories of fishing nets continuously, during the implementation of fishing processes (during casting or pulling out the nets and during operations in the port).
As a result of the works carried out, solutions were proposed that were
accepted by the assessment of the project team for the mass implementation and recommendation of appropriate legal solutions. The method of identification of the owner of a given fishing gear remains an open question, and as a basis, the project team proposed using global identifiers and standardization compliant with GS1 standards (e.g. GRAI or GIAI identifier developed on their basis in cooperation with the GS1 organization).
The result of the project are both 3D prototype projects, prototypes made in the project, as well as this report constituting both the technical
documentation of the proposed solution as well as a description of the
research and development works carried out.

Bobofishing method has been observed to be utilized in Barangay Daliao, Toril, Davao City. This method of fishing is associated with reef fishes. Reef fishes caught by this method were identified and subjected to length-weight... more

Bobofishing method has been observed to be utilized in Barangay Daliao, Toril, Davao City. This method of fishing is associated with reef fishes. Reef fishes caught by this method were identified and subjected to length-weight relationship and condition index. Physical dimension of the traps and the pattern of fishing were determined.
Results revealed that there were 60 species belonging to 21 families associated with bobo fishing method in the said site. The establishment of length-weight relationship for 40 species indicated that most of these fishes grew allometrically negative which gave the implication that growth rate in weight decreased as the fish grows in length. Moreover,condition index indicated that most of them attained lesser weight compared with other geographically isolated populations.
Based on these findings, it has been concluded that many species of reef fishes were associated with bobo fishing method. Having negative allometric growth implied that adult specimens face nutritional inadequacy than smaller ones which may be brought by certain factors. The lesser attainment of weight also implied that certain factors affect the well-being of reef fishes in the site such as environment degradation. Furthermore, it was recommended that more extensive studies regarding LWR shall be conducted, incorporating several important variables such as sex and season, geographical and time influences and more extrinsic taxonomical examinations.

The study was conducted during February 2017- January 2018. Data were collected by Questionnaire Interview (QI), Focus Group Discussion (FGD) and cross-check Interview of fishermen and resource persons from 8 villages by the river Banar... more

The study was conducted during February 2017- January 2018. Data were collected by Questionnaire Interview (QI), Focus Group Discussion (FGD) and cross-check Interview of fishermen and resource persons from 8 villages by the river Banar under 4 Unions of Fulbaria Upazila, under Mymensingh District. A total of 62 species of fish and shellfish under 10 Orders and 24 Families were recorded from the Banar river. Among the Orders recorded from the studied river, Cypriniformes (30.65%) was the most dominant Order followed by Siluriformes
(29.04%), Perciformes (22.58%), Synbranchiformes (6.45%), and Decapoda (3.23%). Cyprinidae was the most dominant family contributing 17 species. The availability status of identified species were common (40.32%), seasonal (20.97%), rare (17.74%) and very rare
(20.97%). Seventeen threatened fish species were recorded from the river in which 8 species were endangered, 7 were vulnerable and 2 were critically endangered. Among the threatened fish species, endangered (47.06%) was found to be most abundant followed by vulnerable (41.18%) and critically endangered (11.76%). Fishermen were found to use 10 types of the fishing gears. Use of illegal fishing gears, overfishing, decreasing depth of river and katha fishing were observed as major threats for fish diversity in the river.

Critical issues on fishing gear and fishing method of the world are re-appraised with particular reference to the Nigerian fishing industry. The adaptability, selectivity and seasonality of both passive and active fishing gears to... more

Critical issues on fishing gear and fishing method of the world are re-appraised with particular reference to the Nigerian fishing industry. The adaptability, selectivity and seasonality of both
passive and active fishing gears to aquatic environment, fish species and time of the year are reexamined. Furthermore, new innovations (mechanization) to improve the efficiency of gears and thus the fishery are addressed in the light of rapid socioeconomic changes within the fishery industry. Included along with miscellaneous fish viewing and fishing methods are eleven illustrative figures on fishing gear technology and fishing methods.

Historical information about coracles - hide covered boats used since Antiquity.

Fishing gears are important tools in catching aquatic species that is consumed by local communities. The design and methods employed describe the characteristics of species caught by these gears. This study was conducted to document the... more

Fishing gears are important tools in catching aquatic species that is consumed by local communities. The design and methods employed describe the characteristics of species caught by these gears. This study was conducted to document the fishing gears and their common catch in SIMBANA (Simpocan, Bagong Bayan, Napsan), Puerto Princesa City, and Rasa Island, Narra, Palawan, Philippines. Fishing gears used were photo-documented, and their common catches were identified using one-on-one interviews with fishermen. Sixteen fishing gears were documented, with six "nets", four "lines", four "barriers and traps", and two "hand instruments". Six gears were further classified as active gears, while 10 were Passive gears. More gears operate in Rasa Island than in SIMBANA. Most of the species caught are fish, pelagic species and reef-associated. Information gathered can be used for the characterization of the multi-gear fisheries which are important in making fisheries policies and management decisions for the mentioned coastal areas.

This thesis aims to describe the transformations that occurred in fishing between the middle of the 18th century and the Unification of Italy (1861), focusing on the two Apulian coasts: the Adriatic (Province of Bari) and the Ionian... more

This thesis aims to describe the transformations that occurred in fishing between the middle of the 18th century and the Unification of Italy (1861), focusing on the two Apulian coasts: the Adriatic (Province of Bari) and the Ionian (Taranto).
The first chapter is a brief history of Mediterranean fishing: it describes the development of this activity through the centuries, from artisanal techniques and local organization to the introduction of pair trawlers, which occurred for the first time at the beginning of 18th century in Catalunia (Spain).
The second chapter focuses on legislation in the Kingdom of Naples: from the traditional locally-based regulations to national initiatives (the first was in 1784) designed to counteract the sail-trawlers, which also fished far off shore, thus avoiding traditional controls; it outlines fishing legislation in the Kingdom of Naples (which became Kingdom of the Two Sicilies in 1815) until the time of its collapse and unification with other Italian states in 1860.
The third chapter is about the fishermen of Terra di Bari (=Land of Bari), and in particular from Barletta, Trani and Molfetta. The first part of this chapter focuses on the very first occurrences of sail-trawling (pair trawlers) as detailed in provincial records (1770s and 1780s). The introduction of this method was directly connected to a decrease in trade, which had led to unemployment among sailors (and boats). Sail trawling became their favoured alternative activity because it did not require specific know-how. These first trawlermen were therefore lacking in the knowledge of fish and sustainable fishing that traditional fishermen had learnt through their close relationship with the sea over several centuries. The practice set off an intense debate between scientists and policy makers, leading to the introduction of laws and other State intervention in fishing up to 1860. The distance of the Province from the capital and the extreme poverty of the sailor community, which was described in many letters by local administrators to central government, led the latter to exempt these fishermen from complying with national laws on trawling. From the Restoration (1815) onwards, these trawlers (in particular those from Trani and Molfetta) started fishing annually in the Tyrrhenian Sea (in the winter), causing conflicts with local fishing communities. In addition, sailors from Barletta fished in the Ionian Sea when they brought salt to the Ionian coast of Calabria: as a result there were numerous problems with Taranto, a city where fishing had always been the main activity for most of the population.
The last chapter focuses entirely on fishing in Taranto. This city was wholly built on an island "between two seas", the Mar Piccolo (=Little Sea) and the Mar Grande (=Big Sea). Fishing had been the main economic activity since at least the 10th century: it had brought a large income (through taxes on catches) to the Prince of Taranto until the Principality collapsed (1463), and then to the Royal Crown of Naples, which inherited the Prince's assets. This chapter describes the economic organization of these seas, the connected supervision system and the transformation brought about in the last fifteen years of the 18th and the first fifteen years of the 19th century thanks to the efforts of two "enlightened" royal administrators: Tommaso Ciura and Ignazio Maria Marrese. Their work, along with the experiments of Giuseppe Capecelatro (the "enlightened" archbishop of Taranto and a natural scientist known all over Europe), led to the incredible increase in mussel farming in the Mar Piccolo. This activity rapidly became the most important in the city, replacing fishing in the local (and royal) economy.

The aim of this paper is to present the analysis of a selection of archaeological materials included in the arqua collection. The items examined are related to fishing activities and have been found in submarine contexts off the coast of... more

The aim of this paper is to present the analysis of a selection of archaeological materials included in the arqua collection. The items examined are related to fishing activities and have been found in submarine contexts off the coast of Murcia. This analysis has been carried out within the framework of my doctoral studies, currently in progress and through which I intend to compile the evidence for fishing activities in Hispania. This work is the first study with these characteristics in the area, and aims at completing the already available information concerning the coast of the Tarraconensis.

The study of fishing tackle is an innovative research avenue which is improving our understanding of one of the most important past economic activities: fishing. This book is the first attempt to approach this issue in the region known as... more

The study of fishing tackle is an innovative research avenue which is improving our understanding of one of the most important past economic activities: fishing. This book is the first attempt to approach this issue in the region known as Fretum Gaditanum, were over a thousand pieces of evidence pertaining to fishing tackle have been inventoried. In these pages, the reader will find the typo-chronological classification of the material, which follows a diachronic discourse spanning the Phoenician-Punic period and Late Antiquity; special emphasis will be laid on the morphological-typological changes undergone by these artefacts and technological change over time. In this way, a comprehensive picture of the fishing arts practiced in the environment of Gades during Antiquity will be drawn, and the corpus will be compared with those found in other Atlantic and Mediterranean regions.

The purpose of this book is to increase our understanding of the driving forces in pre-modern resource exploitation. Within this, the goal is to make distinction between human and natural impacts on the marine ecosystem through analyses... more

The purpose of this book is to increase our understanding of the driving forces in pre-modern resource exploitation. Within this, the goal is to make distinction between human and natural impacts on the marine ecosystem through analyses of relevant sets of historical source material.
This leads to a starting point of formulating three overarching questions.
1. What were the main forces stimulating changes in the exploitation of North Sea herring in the period of c. 1600-1860. In other words, what were the dynamics of this particular historical system?
2. What was the role of the natural environment in this?
3. What caused the long term decline of the Dutch herring fisheries?

En este trabajo presentamos un estado de la cuestión sobre los anzuelos de pesca en la península ibérica. Para ello realizaremos un análisis diacrónico desde las primeras evidencias que se conocen en el registro arqueológico prehistórico... more

En este trabajo presentamos un estado de la cuestión sobre los anzuelos de pesca en la península ibérica. Para ello realizaremos un análisis diacrónico desde las primeras evidencias que se conocen en el registro arqueológico prehistórico hasta época medieval. Se tratará de anali-zar cómo ha sido su evolución a lo largo de la historia, definiéndose los principales hitos tecnológicos que han ido produciéndose hasta llegar a configurarse el modelo de anzuelo que conocemos en la actualidad, y conside-rándose, al mismo tiempo, cuáles son aquellos rasgos morfo-tipológicos que han perdurado/desaparecido y cuáles han sido transformados/sustituidos. Todo ello nos permitirá valorar aspectos históricos de gran importancia como pueden ser el origen geográfico de las innovaciones y su difusión a escala atlántico-mediterránea a través de posibles fenómenos de interacción cultural. Palabras claves. Anzuelo; hueso; metal; sistema de suje-ción del sedal; arpón. Abstract In this work we introduce a state of the question about fish hooks in the Iberian Peninsula. In order to do so, we will carry out a diachronic analysis from the first evidences known in the prehistoric archeological record until the Medieval time. We will attempt to analyze how they have evolved throughout history, defining the main technological milestones that have been occurring until it turns into the fish hook model we know now. At the same time, we will consider which morphotypological characteristics have persisted/disappeared and which ones have been transformed/replaced. Taking all this into account, we will assess very important historical aspects, like the geographical origin of innovations and their dissemination in the Atlantic and Mediterranean areas thanks to possible cultural. Cómo citar este artículo / How to cite this article: Vargas Girón, J. M. (2020). Orígenes y desarrollo de los anzuelos de pesca en la península ibérica. De la prehistoria a la Edad Media. Lucentum, XXXIX, 87-112. https://doi.

Analysis of the fish bones from the 5th millennium BC settlement on Akab Island in Umm al-Qaiwain emirate in the United Arab Emirates provides evidence of open ocean fishing. The discovery of numerous bones of tuna, as well as the... more

Analysis of the fish bones from the 5th millennium BC settlement on Akab Island in Umm al-Qaiwain emirate in the United Arab Emirates provides evidence of open ocean fishing. The discovery of numerous bones of tuna, as well as the presence of shell fish hooks at the site, suggests that fishing was at least part of the time carried out from boats in the open sea, beyond the shallow waters of the local lagoon. Some fishing was also carried on in these sheltered waters, and analysis of the molluscan and crab remains indicates that mangrove areas were also exploited. Some comments are made concerning the presence of shell fish hooks at the site, as well as certain types of beads and jewellery, which reinforce the idea of a coherent regional cultural entity during the 5th–4th millennia within this region.

TESIS PARA OPTAR EL TÍTULO PROFESIONAL DE ARQUEOLÓGIA.

This article collects and analyzes the literary, archaeological, epigraphic and comparative evidence for fishing with fire, arguing that the range of techniques and technologies employed in antiquity is fundamentally similar to that... more

This article collects and analyzes the literary, archaeological, epigraphic and comparative evidence for fishing with fire, arguing that the range of techniques and technologies employed in antiquity is fundamentally similar to that attested in the early modern Mediterranean and that such fisheries were conducted on a large enough scale that the attendant demand for and trade in torchwood played an important role in the utilization of forest resources.

A fin de determinar los implementos de pesca utilizados por los aborígenes que visitaban la isla Dos Mosquises, Archipiélago de Los Roques, Venezuela, se identificó la muestra de arqueofauna marina proveniente del tamizado fino (malla de... more

A fin de determinar los implementos de pesca utilizados por los aborígenes que visitaban la isla Dos Mosquises, Archipiélago de Los Roques, Venezuela, se identificó la muestra de arqueofauna marina proveniente del tamizado fino (malla de 1 mm ) de una sección del único yacimiento
prehispánico presente en la isla (1200 a 1500 años D.C.), una vez determinado su contexto arqueológico. Posteriormente, se estudió la biología y ecología de las especies identificadas, los
informes etnohistóricos, la pesca artesanal actual del área y datos proporcionados por los informantes nativos.
Se discute el posible y efectivo uso de trampas y redes en la captura de las especies zooarqueológicas identificadas, concluyendo que la red ha sido el arte de pesca principal.