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Articoli di riviste sul tema "Drifting Fish Aggregating Devices"

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Autore: Grafiati

Pubblicato: 22 giugno 2024

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1

Hanich, Quentin, Ruth Davis, Glen Holmes, Elizabeth-Rose Amidjogbe e Brooke Campbell. "Drifting Fish Aggregating Devices (FADs)". International Journal of Marine and Coastal Law 34, n. 4 (4 novembre 2019): 731–54. http://dx.doi.org/10.1163/15718085-23441103.

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AbstractThis article describes the proliferation of drifting fish aggregating devices (FADs) and analyses subsequent legal questions that arise for fisheries and marine litter management over who is responsible for FADs during their drifting stage. This follows recent concerns about unlicensed FADs drifting through closed areas. This article analyses a case study of the Western and Central Pacific Fisheries Commission (WCPFC) in order to determine State obligations to manage drifting FADs. Analysis concludes that a drifting FAD in the WCPFC Area is ‘fishing’ from deployment to recovery, thereby creating obligations to monitor, control and report drifting FADs, consistent with broader obligations for coastal and flag States. The article recommends strengthening regional management in three ways: implement regional drifting FAD monitoring systems; control deployment of drifting FADs so as to promote recovery and minimize lost gear; and define appropriate responses for FADs that drift into national or closed waters without a license.

2

Trygonis, Vasilis, Stratis Georgakarakos, Laurent Dagorn e Patrice Brehmer. "Spatiotemporal distribution of fish schools around drifting fish aggregating devices". Fisheries Research 177 (maggio 2016): 39–49. http://dx.doi.org/10.1016/j.fishres.2016.01.013.

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3

Zhang, Tongzheng, Zhiqiang Liu, Junbo Zhang, Xing Su, Junlin Chen e Rong Wan. "Numerical Study of the Hydrodynamic Response of Biodegradable Drifting Fish Aggregating Devices in Regular Waves". Fishes 9, n. 4 (22 marzo 2024): 112. http://dx.doi.org/10.3390/fishes9040112.

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Fish-aggregating devices play a significant role in tuna purse fisheries. The severe marine environment and the large number of non-biodegradable fish-aggregating devices impact structural safety and cause marine litter. Therefore, hydrodynamic performance and the use of biodegradable materials are crucial issues for ensuring the sustainability of fish-aggregating devices. In this study, a type of virtual biodegradable drifting fish-aggregating device (Bio-DFAD) was designed. Numerical simulations were conducted to investigate the motion responses and relative velocities of Bio-DFADs in regular waves (first- and fifth-order waves). The numerical model was applied based on unsteady Reynolds-averaged Navier–Stokes equations with the realizable k–ε model. For different scenarios of modeling, various conditions were modeled, including the relative length, wave steepness, and diameter of the balsa wood, to analyze their effects on the hydrodynamic response of the Bio-DFADs. The results indicated that the increased relative length, wave steepness, and diameter of balsa wood had a significant influence on the motion response amplitude operators (RAOs) and relative velocity of Bio-DFADs. The results suggested that a relative length (LF/B = 1.5) and smaller diameter (DF = 30 mm) were recommended for fewer motion responses and relative velocity. The obtained results provide insight for practical engineering applications of the hydrodynamic design of Bio-DFADs.

4

Zudaire, Iker, Gala Moreno, Jefferson Murua, Paul Hamer, Hilario Murua, Mariana T. Tolotti, Marlon Roman et al. "Biodegradable drifting fish aggregating devices: Current status and future prospects". Marine Policy 153 (luglio 2023): 105659. http://dx.doi.org/10.1016/j.marpol.2023.105659.

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5

Moreno, Gala, Erwan Josse, Patrice Brehmer e Leif Nøttestad. "Echotrace classification and spatial distribution of pelagic fish aggregations around drifting fish aggregating devices (DFAD)". Aquatic Living Resources 20, n. 4 (ottobre 2007): 343–56. http://dx.doi.org/10.1051/alr:2008015.

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6

Moreno, Gala, Laurent Dagorn, Gorka Sancho e David Itano. "Fish behaviour from fishers’ knowledge: the case study of tropical tuna around drifting fish aggregating devices (DFADs)". Canadian Journal of Fisheries and Aquatic Sciences 64, n. 11 (1 novembre 2007): 1517–28. http://dx.doi.org/10.1139/f07-113.

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Purse-seining for tropical tuna is one of the most technologically advanced fisheries in the world. The purpose of this study was to apply local ecological knowledge (LEK) to assist in the planning of future in situ studies of fish behaviour around drifting fish aggregating devices (DFADs) by prioritizing research topics, thereby reducing the number of potential hypotheses to explore. Interviews of fishing masters of the purse-seine fleets working in the western Indian Ocean provided an alternate, independent, and previously unexplored source of behavioural information, specifically on the attraction, retention, and departure behaviours of tuna schools in relation to DFADs. Most fishing masters agreed that the maximum attraction distance of a DFAD is approximately 10 km and generally agreed to the following statements. Tuna form distinct schools under FADs, commonly segregated by species and size. The main reasons for the departure of tuna aggregations from FADs are changes in currents or FAD movements and location in relation to physical or oceanographic features. The number of actively monitored DFADs at sea in the western Indian Ocean was estimated at approximately 2100. Incorporating fishers into the planning and design stages of future research projects will facilitate collaborative and integrated approaches.

7

Capello, Manuela, Gorka Merino, Mariana Tolotti, Hilario Murua e Laurent Dagorn. "Developing a science-based framework for the management of drifting Fish Aggregating Devices". Marine Policy 153 (luglio 2023): 105657. http://dx.doi.org/10.1016/j.marpol.2023.105657.

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8

Brehmer, Patrice, Erwan Josse e Leif Nøttestad. "Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation?" Marine Ecology 33, n. 2 (5 agosto 2011): 176–82. http://dx.doi.org/10.1111/j.1439-0485.2011.00478.x.

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9

Baidai, Yannick, Jon Uranga, Maitane Grande, Hilario Murua, Josu Santiago, Iñaki Quincoces, Guillermo Boyra, Blanca Orue, Laurent Floch e Manuela Capello. "A standard processing framework for the location data of satellite-linked buoys on drifting fish aggregating devices". Aquatic Living Resources 35 (2022): 13. http://dx.doi.org/10.1051/alr/2022013.

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Satellite-linked buoys used by tropical tuna purse-seine vessels on drifting fish aggregating devices (DFADs) provide a continuous stream of information on both the ocean characteristics and the presence and size of fish aggregations associated with DFADs, enabling the study of pelagic communities. This unprecedented amount of data is characterized by ocean-scale coverage with high spatial and temporal resolutions, but also by different data formats and specifications depending on buoy model and brand, as well as on the type of data exchange agreements into play. Their use for scientific and management purposes is therefore critically dependent on the abilities of algorithms to process heterogeneous data formats and resolutions. This paper proposes a unified set of algorithms for processing the buoys location data used by the two major purse seine fleets operating in the Atlantic and Indian oceans. Three main issues that need to be addressed prior to the exploitation of the data are identified (structural errors, data records on land and on-board vessels) and five specific filtering criteria are proposed to improve the data cleaning process and, hence, quality. Different filtering procedures are also compared, and their advantages and limitations are discussed.

10

Baidai, Y., L. Dagorn, M. J. Amande, D. Gaertner e M. Capello. "Machine learning for characterizing tropical tuna aggregations under Drifting Fish Aggregating Devices (DFADs) from commercial echosounder buoys data". Fisheries Research 229 (settembre 2020): 105613. http://dx.doi.org/10.1016/j.fishres.2020.105613.

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11

Taquet, Marc, Gorka Sancho, Laurent Dagorn, Jean-Claude Gaertner, David Itano, Riaz Aumeeruddy, Bertrand Wendling e Christophe Peignon. "Characterizing fish communities associated with drifting fish aggregating devices (FADs) in the Western Indian Ocean using underwater visual surveys". Aquatic Living Resources 20, n. 4 (ottobre 2007): 331–41. http://dx.doi.org/10.1051/alr:2008007.

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12

Wan, Rong, Tongzheng Zhang, Cheng Zhou, Fenfang Zhao e Weijie Wang. "Experimental and numerical investigations of hydrodynamic response of biodegradable drifting Fish Aggregating Devices (FADs) in waves". Ocean Engineering 244 (gennaio 2022): 110436. http://dx.doi.org/10.1016/j.oceaneng.2021.110436.

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13

Davies, Tim K., Chris C. Mees e E. J. Milner-Gulland. "The past, present and future use of drifting fish aggregating devices (FADs) in the Indian Ocean". Marine Policy 45 (marzo 2014): 163–70. http://dx.doi.org/10.1016/j.marpol.2013.12.014.

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14

Frankemölle, Philippe F. V. W., Peter D. Nooteboom, Joe Scutt Phillips, Lauriane Escalle, Simon Nicol e Erik van Sebille. "Assessing the drift of fish aggregating devices in the tropical Pacific Ocean". Ocean Science 20, n. 1 (16 gennaio 2024): 31–41. http://dx.doi.org/10.5194/os-20-31-2024.

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Abstract. The tropical Pacific Ocean is characterized by its dominant zonal flow, strong climate dependence on the El Niño–Southern Oscillation (ENSO) and abundant tuna stocks. Tuna fisheries in the West and Central Pacific Ocean accounted for 55 % of the world-wide tuna catch in 2019 and are one of the main sources of income in many Pacific island nations. One of the dominant fishing methods in this region relies on the use of drifting fish aggregating devices (dFADs): rafts with long underwater appendages (on average 50 m deep) that aggregate fish. Although currents such as the North Equatorial Countercurrent (NECC) and South Equatorial Current (SEC) in the tropical Pacific Ocean vary strongly with ENSO, little is known about the impact of this variability in flow on dFAD dispersion. In this study, virtual Lagrangian particles are tracked for the period 2006 to 2021 over the domain in a 3D hydrodynamic model and are advected in simulations with only surface flow, as well as simulations using a depth-averaged horizontal flow over the upper 50 m, representing virtual dFADs. Zonal displacements, eddy-like behaviour and ENSO variability are then studied for both types of virtual particles. It was found that virtual particles advected by surface flow only are displaced up to 35 % farther than virtual dFADs subjected to a depth-averaged flow, but no other major differences were found in dispersion patterns. The strongest correlations between ENSO and virtual dFAD dispersion for the assessed variables were found in the West Pacific Ocean, with Pearson correlation coefficients of up to 0.59 for virtual dFAD displacement. Connections between ENSO and eddy-like behaviour were found in the western part of the SEC, indicating more circulation and meandering during El Niño. These findings may be useful for improving sustainable deployment strategies during ENSO events and understanding the ocean processes driving the distribution of dFADs.

15

Fuller, Daniel W., e Kurt M. Schaefer. "Evaluation of a fishing captain's ability to predict species composition, sizes, and quantities of tunas associated with drifting fish-aggregating devices in the eastern Pacific Ocean". ICES Journal of Marine Science 71, n. 7 (25 febbraio 2014): 1774–80. http://dx.doi.org/10.1093/icesjms/fsu012.

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Abstract Experiments were conducted to evaluate a fishing captain's ability to predict species composition, sizes, and quantities of tunas associated with drifting fish-aggregating devices (FADs), before encirclement with a purse-seine net. Operating in the equatorial eastern Pacific Ocean, during 11 May–23 July 2011, Captain Ricardo Diaz detected small quantities of bigeye (Thunnus obesus) and yellowfin (Thunnus albacares) tunas within large FAD-associated aggregations dominated by skipjack tuna (Katsuwonus pelamis). The captain's predictions were significantly related to the actual total catch and catch by species, but not to size categories by species. His predictions of species composition were most accurate when estimates of bigeye and yellowfin tuna were combined. If purse-seine captains are able to make accurate predictions of the proportion of bigeye and yellowfin tunas present in mixed-species aggregations associated with FADs, managers may wish to consider incentives to fishers to reduce the fishing mortality on those species.

16

Gaertner, JC, M. Taquet, L. Dagorn, B. Mérigot, R. Aumeeruddy, G. Sancho e D. Itano. "Visual censuses around drifting fish aggregating devices (FADs): a new approach for assessing the diversity of fish in open-ocean waters". Marine Ecology Progress Series 366 (29 agosto 2008): 175–86. http://dx.doi.org/10.3354/meps07554.

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17

Taquet, Marc, Gorka Sancho, Laurent Dagorn, Jean-Claude Gaertner, David Itano, Riaz Aumeeruddy, Bertrand Wendling e Christophe Peignon. "Erratum to: Characterizing fish communities associated with drifting fish aggregating devices (FADs) in the Western Indian Ocean using underwater visual surveys". Aquatic Living Resources 30 (2017): 26. http://dx.doi.org/10.1051/alr/2017030.

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18

Orue, Blanca, Jon Lopez, Gala Moreno, Josu Santiago, Maria Soto e Hilario Murua. "Aggregation process of drifting fish aggregating devices (DFADs) in the Western Indian Ocean: Who arrives first, tuna or non-tuna species?" PLOS ONE 14, n. 1 (15 gennaio 2019): e0210435. http://dx.doi.org/10.1371/journal.pone.0210435.

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19

Imzilen, Taha, David M. Kaplan, Nicolas Barrier e Christophe Lett. "Simulations of drifting fish aggregating device (dFAD) trajectories in the Atlantic and Indian Oceans". Fisheries Research 264 (agosto 2023): 106711. http://dx.doi.org/10.1016/j.fishres.2023.106711.

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20

Filmalter, John D., Laurent Dagorn, Paul D. Cowley e Marc Taquet. "First Descriptions of the Behavior of Silky Sharks, Carcharhinus Falciformis, Around Drifting Fish Aggregating Devices in the Indian Ocean". Bulletin of Marine Science 87, n. 3 (1 luglio 2011): 325–37. http://dx.doi.org/10.5343/bms.2010.1057.

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21

Escalle, Lauriane, Jennyfer Mourot, Paul Hamer, Steven R. Hare, Naiten Bradley Phillip e Graham M. Pilling. "Towards non-entangling and biodegradable drifting fish aggregating devices – Baselines and transition in the world’s largest tuna purse seine fishery". Marine Policy 149 (marzo 2023): 105500. http://dx.doi.org/10.1016/j.marpol.2023.105500.

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22

Orue, Blanca, Jon Lopez, Maria Grazia Pennino, Gala Moreno, Josu Santiago e Hilario Murua. "Comparing the distribution of tropical tuna associated with drifting fish aggregating devices (DFADs) resulting from catch dependent and independent data". Deep Sea Research Part II: Topical Studies in Oceanography 175 (maggio 2020): 104747. http://dx.doi.org/10.1016/j.dsr2.2020.104747.

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23

Hallier, J., e D. Gaertner. "Drifting fish aggregation devices could act as an ecological trap for tropical tuna species". Marine Ecology Progress Series 353 (17 gennaio 2008): 255–64. http://dx.doi.org/10.3354/meps07180.

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24

Scutt Phillips, J., L. Escalle, G. Pilling, A. Sen Gupta e E. van Sebille. "Regional connectivity and spatial densities of drifting fish aggregating devices, simulated from fishing events in the Western and Central Pacific Ocean". Environmental Research Communications 1, n. 5 (12 giugno 2019): 055001. http://dx.doi.org/10.1088/2515-7620/ab21e9.

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25

Jaquemet, S., M. Potier e F. Ménard. "Do drifting and anchored Fish Aggregating Devices (FADs) similarly influence tuna feeding habits? A case study from the western Indian Ocean". Fisheries Research 107, n. 1-3 (gennaio 2011): 283–90. http://dx.doi.org/10.1016/j.fishres.2010.11.011.

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26

Tolotti, Mariana Travassos, Fabien Forget, Manuela Capello, John David Filmalter, Melanie Hutchinson, David Itano, Kim Holland e Laurent Dagorn. "Association dynamics of tuna and purse seine bycatch species with drifting fish aggregating devices (FADs) in the tropical eastern Atlantic Ocean". Fisheries Research 226 (giugno 2020): 105521. http://dx.doi.org/10.1016/j.fishres.2020.105521.

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27

Maufroy, Alexandra, David M. Kaplan, Nicolas Bez, Alicia Delgado De Molina, Hilario Murua, Laurent Floch e Emmanuel Chassot. "Massive increase in the use of drifting Fish Aggregating Devices (dFADs) by tropical tuna purse seine fisheries in the Atlantic and Indian oceans". ICES Journal of Marine Science 74, n. 1 (26 ottobre 2016): 215–25. http://dx.doi.org/10.1093/icesjms/fsw175.

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Abstract (sommario):

Since the mid-1990s, drifting Fish Aggregating Devices (dFADs), artificial floating objects designed to aggregate fish, have become an important mean by which purse seine fleets catch tropical tunas. Mass deployment of dFADs, as well as the massive use of GPS buoys to track dFADs and natural floating objects, has raised serious concerns for the state of tropical tuna stocks and ecosystem functioning. Here, we combine tracks from a large proportion of the French GPS buoys from the Indian and Atlantic oceans with data from observers aboard French and Spanish purse seiners and French logbook data to estimate the total number of dFADs and GPS buoys used within the main fishing grounds of these two oceans over the period 2007–2013. In the Atlantic Ocean, the total number of dFADs increased from 1175 dFADs active in January 2007 to 8575 dFADs in August 2013. In the Indian Ocean, this number increased from 2250 dFADs in October 2007 to 10 300 dFADs in September 2013. In both oceans, at least a fourfold increase in the number of dFADs was observed over the 7-year study period. Though the relative proportion of natural to artificial floating objects varied over space, with some areas such as the Mozambique Channel and areas adjacent to the mouths of the Niger and Congo rivers being characterized by a relatively high percentage of natural objects, in no region do dFADs represent <50% of the floating objects and the proportion of natural objects has dropped over time as dFAD deployments have increased. Globally, this increased dFAD use represents a major change to the pelagic ecosystem that needs to be closely followed in order to assess its impacts and avoid negative ecosystem consequences.

28

Maufroy, Alexandra, Emmanuel Chassot, Rocío Joo e David Michael Kaplan. "Large-Scale Examination of Spatio-Temporal Patterns of Drifting Fish Aggregating Devices (dFADs) from Tropical Tuna Fisheries of the Indian and Atlantic Oceans". PLOS ONE 10, n. 5 (26 maggio 2015): e0128023. http://dx.doi.org/10.1371/journal.pone.0128023.

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29

Báez, José Carlos, Santiago Déniz, María Lourdes Ramos, Maitane Grande, Jon Ruiz, Hilario Murua, Josu Santiago et al. "Data Provision for Science-Based FAD Fishery Management: Spanish FAD Management Plan as a Case Study". Sustainability 14, n. 6 (10 marzo 2022): 3278. http://dx.doi.org/10.3390/su14063278.

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The use of fish aggregating devices (FADs) in tropical tuna fisheries has increased significantly during recent decades. Concurrently, concern about juvenile tuna mortality, bycatch, and marine debris associated with FAD fisheries increased, and this led to the implementation of FAD management measures and more sustainable designs (e.g., non-entangling or biodegradable FADs, limits on active FADs, etc.). This document reviews data collection and reporting requirements of tuna-Regional Fisheries Management Organizations (t-RFMOs) on drifting FADs and summarizes the work carried out since 2010 under the Spanish FAD management plan to create an adequate standard data collection aimed at improving science-based decision making. The aim of this study is to assist in the strengthening of data collection systems through: (1) a review of the existing data requirements, (2) a review of the status of FAD data collection worldwide and identification of data gaps, and (3) recommendations aimed at improving FAD management through the strengthening of FAD data requirements. Due to the complexities of data collection, we summarize the difficulties faced when processing the data and propose concrete and practical solutions to improve both the data collection system and information quality.

30

Fonteneau, Alain, Emmanuel Chassot e Nathalie Bodin. "Global spatio-temporal patterns in tropical tuna purse seine fisheries on drifting fish aggregating devices (DFADs): Taking a historical perspective to inform current challenges". Aquatic Living Resources 26, n. 1 (gennaio 2013): 37–48. http://dx.doi.org/10.1051/alr/2013046.

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31

Lennert-Cody, Cleridy E., Gala Moreno, Victor Restrepo, Marlon H. Román e Mark N. Maunder. "Recent purse-seine FAD fishing strategies in the eastern Pacific Ocean: what is the appropriate number of FADs at sea?" ICES Journal of Marine Science 75, n. 5 (18 aprile 2018): 1748–57. http://dx.doi.org/10.1093/icesjms/fsy046.

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Abstract Concerns about the ecological impact of recent increases in the use of drifting fish-aggregating devices (FADs) have led to implementation of FAD limits worldwide in purse-seine fisheries targeting tropical tunas. However, quantitative analyses supporting such management measures are needed. Analyses of observer data for purse-seine vessels operating in the eastern Pacific Ocean (EPO) during 2012–2015 were conducted. FAD fishing strategies identified in this analysis were found to vary with distance to the coast. Vessels that operated furthest offshore made a large number of FAD deployments and fished primarily on FADs they deployed themselves. Vessels that operated closest to the coast made the fewest FAD deployments and fished about equally on FADs they deployed themselves and on FADs deployed by other vessels. Independent of the FAD fishing strategy, the estimated relationship between deployments and sets was increasing but nonlinear, with a reduced rate of return beyond about 200 deployments. An analysis of the relationship between deployments and standardized catch per successful set, however, provided some support for the hypothesis that more deployments may allow vessels to optimize fishing efficiency. These results highlight the complexity of EPO FAD fishing strategies and have management implications for limits on FAD usage globally.

32

Lopez, Jon, Gala Moreno, Cleridy Lennert-Cody, Mark Maunder, Igor Sancristobal, Ainhoa Caballero e Laurent Dagorn. "Environmental preferences of tuna and non-tuna species associated with drifting fish aggregating devices (DFADs) in the Atlantic Ocean, ascertained through fishers’ echo-sounder buoys". Deep Sea Research Part II: Topical Studies in Oceanography 140 (giugno 2017): 127–38. http://dx.doi.org/10.1016/j.dsr2.2017.02.007.

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Forget, Fabien G., Manuela Capello, John D. Filmalter, Rodney Govinden, Marc Soria, Paul D. Cowley e Laurent Dagorn. "Behaviour and vulnerability of target and non-target species at drifting fish aggregating devices (FADs) in the tropical tuna purse seine fishery determined by acoustic telemetry". Canadian Journal of Fisheries and Aquatic Sciences 72, n. 9 (settembre 2015): 1398–405. http://dx.doi.org/10.1139/cjfas-2014-0458.

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Characterizing the vulnerability of both target and non-target (bycatch) species to a fishing gear is a key step towards an ecosystem-based fisheries management approach. This study addresses this issue for the tropical tuna purse seine fishery that uses fish aggregating devices (FADs). We used passive acoustic telemetry to characterize, on a 24 h scale, the associative patterns and the vertical distribution of skipjack (Katsuwonus pelamis), yellowfin (Thunnus albacares), and bigeye tuna (Thunnus obesus) (target species), as well as silky shark (Carcharhinus falciformis), oceanic triggerfish (Canthidermis maculata), and rainbow runner (Elagatis bipinnulata) (major non-target species). Distinct diel associative patterns were observed; the tunas and the silky sharks were more closely associated with FADs during daytime, while the rainbow runner and the oceanic triggerfish were more closely associated during the night. Minor changes in bycatch to catch ratio of rainbow runner and oceanic triggerfish could possibly be achieved by fishing at FADs after sunrise. However, as silky sharks display a similar associative pattern as tunas, no specific change in fishing time could mitigate the vulnerability of this more sensitive species. For the vertical distribution, there was no particular time of the day when any species occurred beyond the depth of a typical purse seine net. While this study does not provide an immediate solution to reduce the bycatch to catch ratios of the FAD-based fishery in the western Indian Ocean, the method described here could be applied to other regions where similar fisheries exist so as to evaluate potential solutions to reducing fishing mortality of non-target species.

34

Schaefer, Kurt M., e Daniel W. Fuller. "Simultaneous behavior of skipjack (Katsuwonus pelamis), bigeye (Thunnus obsesus), and yellowfin (T. albacares) tunas, within large multi-species aggregations associated with drifting fish aggregating devices (FADs) in the equatorial eastern Pacific Ocean". Marine Biology 160, n. 11 (9 luglio 2013): 3005–14. http://dx.doi.org/10.1007/s00227-013-2290-9.

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35

Govinden, Rodney, Manuela Capello, Fabien Forget, John D. Filmalter e Laurent Dagorn. "Behavior of skipjack ( Katsuwonus pelamis ), yellowfin ( Thunnus albacares ), and bigeye ( T. obsesus ) tunas associated with drifting fish aggregating devices (dFADs) in the Indian Ocean, assessed through acoustic telemetry". Fisheries Oceanography 30, n. 5 (26 marzo 2021): 542–55. http://dx.doi.org/10.1111/fog.12536.

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Eddy, Corey, Richard Brill e Diego Bernal. "Rates of at-vessel mortality and post-release survival of pelagic sharks captured with tuna purse seines around drifting fish aggregating devices (FADs) in the equatorial eastern Pacific Ocean". Fisheries Research 174 (febbraio 2016): 109–17. http://dx.doi.org/10.1016/j.fishres.2015.09.008.

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37

Schaefer, Kurt M., Daniel W. Fuller e Milani Chaloupka. "Performance evaluation of a shallow prototype versus a standard depth traditional design drifting fish-aggregating device in the equatorial eastern Pacific tuna purse-seine fishery". Fisheries Research 233 (gennaio 2021): 105763. http://dx.doi.org/10.1016/j.fishres.2020.105763.

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38

Escalle, Lauriane, Daniel Gaertner, Pierre Chavance, Alicia Delgado de Molina, Javier Ariz e Bastien Mérigot. "Forecasted consequences of simulated FAD moratoria in the Atlantic and Indian Oceans on catches and bycatches". ICES Journal of Marine Science 74, n. 3 (13 dicembre 2016): 780–92. http://dx.doi.org/10.1093/icesjms/fsw187.

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Abstract (sommario):

Given the increasingly extensive use of drifting fish aggregation devices (FADs) by the purse-seine fisheries targeting tropical tunas, fishing effort restrictions have been introduced to manage tropical tuna stocks. However, these measures are focused on the protection of juvenile tunas and do not take account of the potential impact on bycatch or associated megafauna (whales and whale sharks). An iterative “fishing-day” Monte Carlo simulation model was developed to investigate the consequences on tropical tunas and bycatch of introducing extensive area 6-month moratoria on FAD activities. The model allowed for variability in a range of plausible values of the parameters characterizing the fishing operations conducted by European purse-seiners in the eastern tropical Atlantic and western Indian Oceans for the period 2005–2014. Monte Carlo simulations, using probabilities based on these fishery data, were carried out for the French and Spanish fishing fleets separately to account for differences in fishing strategies. The models predicted a decrease in FAD sets and an increase in free school sets. As a consequence, the catch of small tuna (<10 kg) decreased while the catch of large tuna (≥10 kg) increased, leading to an overall increase in tuna catch of 100–200 tons/year/vessel in the Atlantic Ocean, and a decrease of 400–1500 tons/year/vessel in the Indian Ocean. The bycatch decreased in the Indian Ocean, while in the Atlantic Ocean billfishes, turtles and chondrichthyans bycatch increased slightly and other bony fishes decreased. Because fishing practices were modified, whale and whale shark associated sets increased slightly in the Indian Ocean.

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Dempster, Tim, e Michael J. Kingsford. "Drifting objects as habitat for pelagic juvenile fish off New South Wales, Australia". Marine and Freshwater Research 55, n. 7 (2004): 675. http://dx.doi.org/10.1071/mf04071.

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The importance of drifting objects to small juvenile pelagic fish was investigated off the coast of New South Wales, Australia. Distance-related and temporal patterns in the distribution of clumps of drifting algae were investigated with 5000 m2 transects at five distances from shore (0.1, 0.5, 1, 5 and 10 km), two to three times per season for 2 years. Juvenile fish associated with drift algae were collected. Clumps of algae, predominantly Sargassum spp., were most abundant in spring, which coincided with the highest abundance of alga-associated post-flexion juvenile fish. Drift algae were also most abundant close to shore, probably due to the proximity to source and the dominant onshore winds. Fish were quickly attracted to drifting artificial objects (fish aggregation device; FADs), although the magnitude of attraction varied greatly among days. The relative abundance of small fish in open waters available to colonise FADs and differing weather conditions may explain much of this variability. More fish colonised FADs with an odour source than unscented control FADs, indicating small fish may use chemical cues to locate drifting structures. We conclude that juvenile fish actively seek drifting objects as pre-settlement habitat, which may reduce predation and enhance settlement opportunities.

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Moreno, G., L. Dagorn, M. Capello, J. Lopez, J. Filmalter, F. Forget, I. Sancristobal e K. Holland. "Fish aggregating devices (FADs) as scientific platforms". Fisheries Research 178 (giugno 2016): 122–29. http://dx.doi.org/10.1016/j.fishres.2015.09.021.

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Ibrahim, Sakri, Julaihi Matusin e Sukree Hajisamae. "Natural and Combination Fish Aggregating Devices (FADS) as Tools for Fish Aggregation in Lake Kenyir, Trengganu, Malaysia". ASEAN Journal on Science and Technology for Development 17, n. 2 (1 novembre 2000): 39. http://dx.doi.org/10.29037/ajstd.114.

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Altinagac, Ugur, Ali Kara, Adnan Ayaz, Deniz Acarli, Cenkmen R. Begburs e Alkan Oztekin. "Comparison of Fish Aggregating Devices (FADs) Having Different Attractors". Journal of Animal and Veterinary Advances 9, n. 6 (1 giugno 2010): 1026–29. http://dx.doi.org/10.3923/javaa.2010.1026.1029.

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Ibrahim, Sakri, Mohd Azmi Ambak, Lokman Shamsudin e Mohd Zaini Samsudin. "Importance of fish aggregating devices (FADs) as substrates for food organisms of fish". Fisheries Research 27, n. 4 (luglio 1996): 265–73. http://dx.doi.org/10.1016/0165-7836(96)00473-0.

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Bush, Simon R., e Arthur P. J. Mol. "Governing in a placeless environment: Sustainability and fish aggregating devices". Environmental Science & Policy 53 (novembre 2015): 27–37. http://dx.doi.org/10.1016/j.envsci.2014.07.016.

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Hargiyatno, Ignatius Tri, Suyud Warno Utomo, Rauf Achmad Sue e Wudianto. "Tuna Fisheries Sustainable Management: Assessing of Indonesia Fish Aggregating Devices (FADs) Fisheries". E3S Web of Conferences 68 (2018): 04019. http://dx.doi.org/10.1051/e3sconf/20186804019.

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Abstract (sommario):

This paper aims to describe the Fish Aggregating Devices (FADs) fisheries in Indonesia and its relation to sustainable fisheries management. On tuna fishing, FADs are widely used as a tool to attract fish. FADs uncontrolled development is feared to have an impact on the sustainability of fish resources. We found that most of the fish caught around FADs are still juvenile. Deployment FADs can also interfere with the swimming pattern of tuna resources. This is negatively affecting the sustainability of tuna resources. However, from the social and economic aspects, FADs provide significant benefits for fishing communities. The Government has imposed regulations on FADs but not yet implemented. The objective of SDG's in the management of tuna fisheries associated with FADs can be implemented through the application of RFMO regulations. Findings from this paper can be used for policy recommendations for the management of sustainable FADsfisheries.

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Mendes de Barros Correia, José Renato, Erandy Gomes da Silva, Carlos Augusto França Schettini, José Carlos Pacheco dos Santos, Tiago Hilário Pedrosa Campello e Maria Elisabeth De Araújo. "USING AGGREGATING DEVICES TO SAMPLE FISH RECRUITS AROUND DEEP SHIPWRECKS: EXPERIMENTS AND SUGGESTIONS". Arquivos de Ciências do Mar 53, n. 1 (31 agosto 2020): 63–81. http://dx.doi.org/10.32360/acmar.v53i1.42376.

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Abstract (sommario):

Fish aggregating devices (FAD) are an ancient fishery technique that benefits from the gregarious behavior of many species. They represent alternatives to usual census approach to study fish recruits. Based on this, we test two FAD models built for fish recruitment research, Standard monitoring unit for the recruitment of reef fishes (SMURF) and Artificial Reef Mooring (ARM) moored for the first time close to deep shipwrecks inBrazil Northeastern coast. We compared fish recruits’ abundance sampled by both models at two depths, bottom and mid-water (6 meters from the bottom). SMURFs sampled seven times more fish recruits than ARM with no difference between depth. We discovered that SMURFs mooring tilted 24º in mean with local marine currents. A long-term study with SMURFs tested immersion time influence in recruit’s sampling, and explored recruit’s abundance and standard length at two depth from the bottom. Increasing immersion timefrom 14-28 days did not influence recruit’s abundance. Bottom and Mid-water SMURFs sampled equal recruit’s number and fish sizes were significantly larger at the bottom. FADs, specially SMURFs, showed good tool to sample fish recruits in deeper shipwrecks,however standardization of FAD deployment is indicated to maximize work time and security in unstable sea conditions.

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Hafinuddin, Hafinuddin, Nilam Shantica e Syarifah Zuraidah. "STUDI PENDAPATAN DAN POLA BAGI HASIL NELAYAN PUKAT PAYANG YANG MENGGUNAKAN ALAT BANTU RUMPON". JURNAL PERIKANAN TROPIS 6, n. 1 (1 aprile 2019): 33. http://dx.doi.org/10.35308/jpt.v6i1.1181.

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Rumpon (fish aggregating device) is a tool for fisherman to catch fish in the sea. This research aims to know income level and plural by used sharing profit of seine net (pukat payang) with fish aggregating devices (FADs). This study have done on Agustus-September 2016, at fish landing of Ujong Baroh (PPI Ujong Baroh) district of West Aceh. Survey method was used for this study analysis of data is using deep profit analysis with to considering investment value and cutback and also descriptive analysis. Income per month for each fisherman is Rp. 2.642.776,3,-; ship-owner (Toke Boat) Rp. 29.599.095,6,-; wholesaler (Toke Bangku) Rp. 7.399.774,-. Percentage of sharing profit at fish landing of ujong Baroh is for ship-owner 40%, fisherman 50% and wholesaler 10%. FAD using for seine net show expected to increasing profit for fisherman of boat seine.

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Yusfiandayani, Roza, Mulyono e Sahrin Nugroho. "Catching trial around portable Fish Aggregating Devices (FADs) at Belitung Waters". IOP Conference Series: Earth and Environmental Science 1033, n. 1 (1 giugno 2022): 012028. http://dx.doi.org/10.1088/1755-1315/1033/1/012028.

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Abstract Belitung Regency is an administrative area in the Bangka Belitung Islands Province. Handline is one of the most popular fishing gear in Belitung Island. However, the production value of handline fishing gear has decreased recently. This decrease was caused by the lack of fishing technology in handline fishing which potentially threatened the sustainability of small-scale fishing industry in the region. The use of portable Fish Aggregating Devices (FADs) technology was expected to increase the productivity of handline fishing gear. This study aims to compare the composition of handline catch, productivity, and fishers total income using portable FADs and without FADs. Sixteen experimental fishing trips were conducted to collect data. The results showed that the dominant catch of handline using portable FADs was threadfin breams (Nemipterus hexodon) (50.7%), greater lizardfish (Saurida tumbil) (27.4%), yellow stripe threadfin bream (Pentapodus aureofasciatus) (10.7%), grouper (Epinephelus bleeker) (4.6%), monocle bream (Scolopsis sp.) (4.2%), yellow jack (Caranx bartholomei) (2.1%), and mackerel (Acanthocybium solandri) (0.2%). The number of catches using portable FADs was 521 of fish (37%), while the one without FADs was 888 of fish (63%). However, based on its weight, the operation using portable FADs resulted in 84.4 kg (58%) and those without FADs was 61.6 kg (41%). The productivity of handline fishing with portable FADs was higher, 1.32 kg / trip, compared to its counterpart which was 0.91 kg / trip. Based on the Kruskal-Wallis test, it showed that the use of portable FADs has a significant effect on handline fishing. Additionally, the total income of fishermen with portable FADs was higher than those without portable FADs.

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Moreno, Gala, Guillermo Boyra, Igor Sancristobal, David Itano e Victor Restrepo. "Towards acoustic discrimination of tropical tuna associated with Fish Aggregating Devices". PLOS ONE 14, n. 6 (5 giugno 2019): e0216353. http://dx.doi.org/10.1371/journal.pone.0216353.

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Mbaru, Emmanuel K., Dorcas Sigana, Renison K. Ruwa, Elizabeth M. Mueni, Collins K. Ndoro, Edward N. Kimani e Boaz Kaunda-Arara. "Experimental evaluation of influence of FADs on community structure and fisheries in coastal Kenya". Aquatic Living Resources 31 (2018): 6. http://dx.doi.org/10.1051/alr/2017045.

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Abstract (sommario):

Fish aggregating devices (FADs) have been widely used by commercial fisheries to increase the catchability of pelagic stocks in the open sea. FADs have the potential to enhance nearshore small-scale fisheries where stocks are often overfished. This study examined changes in catch composition, abundance, catch and effort, and aspects of diversity in Kenya's nearshore coastal fisheries after deployment of anchored fish aggregating devices (AFADs). The study combined both fishery independent and dependent methods in assessing changes in fish assemblages post-deployment. Results showed orders of magnitude increase in length, weight, commercial value, and catch per unit effort (CPUE) of landed catch after deployment of FADs suggesting that FADs had a positive effect on the local fishery. Species richness at FAD sites increased post-deployment (n = 281) compared to pre-deployment values (n = 223). Simultaneous use of several complementary structural indices may be required in order to accurately describe and monitor fish assemblages around the FADs. The findings suggest that AFADs are capable of creating both short and long-term impacts on livelihoods, with the potential to deflect pressure on the overfished nearshore fish stocks. However, more research will be needed on redistribution of fish around FADs, design and placement configuration, and site selection amongst others.