Relevant bibliographies by topics / Seabird by-catch

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Academic literature on the topic 'Seabird by-catch'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Seabird by-catch"

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Favero, M., and J. P. Seco Pon. "Challenges in seabird by-catch mitigation." Animal Conservation 17, no. 6 (November 27, 2014): 532–33. http://dx.doi.org/10.1111/acv.12180.

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Boyd, C. "Minimizing seabird by-catch in industrial fisheries." Animal Conservation 17, no. 6 (December 2014): 530–31. http://dx.doi.org/10.1111/acv.12179.

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Robertson, Graham. "The culture and practice of longline tuna fishing: implications for seabird by-catch mitigation." Bird Conservation International 8, no. 3 (September 1998): 211–21. http://dx.doi.org/10.1017/s095927090000188x.

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SummaryThe development of practical approaches to seabird by-catch reduction in longline tuna fisheries is dependent upon knowledge of fishing practices and the cultural and vocational nuances of fishermen. This overview, drawn from information gathered on Japanese tuna vessels in Australian waters, describes the Japanese method of tuna longlining and lists possible reasons for the reluctance shown by tuna fishermen in the adoption of measures to reduce the incidental take of seabirds. While the focus is on Japan there are reasons to believe that tuna fishing for long periods on the high seas is a culture of its own that transcends nationalities. The acceptance of change in fishing cultures, unless imposed by economic necessity or direct government policy, is slow. The overview also makes some suggestions for future efforts to reduce seabird deaths in longline tuna fisheries.
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Norden, W. S., and J. P. Pierre. "Exploiting sensory ecology to reduce seabird by-catch." Emu - Austral Ornithology 107, no. 1 (March 2007): 38–43. http://dx.doi.org/10.1071/mu06050.

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Ogi, Haruo. "International and National Problems in Fisheries Seabird By-Catch." Journal of Disaster Research 3, no. 3 (June 1, 2008): 187–95. http://dx.doi.org/10.20965/jdr.2008.p0187.

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Large-scale international fisheries have seen many developments, including the adoption of 200-mile fishing limits by many countries, including Japan, between 1976 and 1977. On the North Pacific high seas, the use of neon flying squid and large-mesh driftnets is expanding rapidly. The many kinds and large numbers of nontargeted species caught in such driftnets, however, influenced world public opinion and the United Nations to prohibit driftnet fishing on the high seas in 1991. The investigation on the consequences of such driftnets have been often failed to be conducted in Japan, because Japan’s fisheries have been downsized. Japan’s fishing industry has not addressed this problem appropriately, even though the authorities have recommended that fishing fleets minimize by-catch. Japan has no legislation designating sea surface conservation for sealife, and fisheries by-catch have dramatically reduced the number of breeding seabirds in isolated habitats. The Japanese murrelet (Synthliboramphus wumizusume) of Miyazaki Prefecture and the common murre (Uria aalge) and the tufted puffin (Lunda cirrhata) of Hokkaido face a serious situation. The number of the spectacled guillemot (Cepphus carbo) living along Tohoku-Hokkaido coast has rapidly decreased due to by-catch fishing. Russia has legislation designating breeding places for seabirds and animals and designating surroundings as conservation areas. The Northern Territory adjoining Hokkaido thus has extremely diverse sea species. Japan has no corresponding legislation to succeed the Russian conservation legislation if Russia should return the Northern Territories to Japan.
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Bull, Leigh S. "New mitigation measures reducing seabird by-catch in trawl fisheries." Fish and Fisheries 10, no. 4 (December 2009): 408–27. http://dx.doi.org/10.1111/j.1467-2979.2009.00327.x.

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Durán Muñoz, P., F. J. Murillo, M. Sayago-Gil, A. Serrano, M. Laporta, I. Otero, and C. Gómez. "Effects of deep-sea bottom longlining on the Hatton Bank fish communities and benthic ecosystem, north-east Atlantic." Journal of the Marine Biological Association of the United Kingdom 91, no. 4 (November 2, 2010): 939–52. http://dx.doi.org/10.1017/s0025315410001773.

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The effects of deep-sea bottom longlining on fish communities and the benthic ecosystem, as well as the interactions between fishing and seabirds, were studied based on data collected from a joint collaboration between the Spanish Institute of Oceanography and a longliner, carried out on the Hatton Bank area (north-east Atlantic) in 2008. A total of 38 longline sets were distributed mainly along the rugged bottom of the rocky outcrop at depths ranging from 750 to 1500 m. Deep-water sharks and lotids were predominant in the catches contributing respectively 80.4% and 13.1% in terms of weight. Deep-water sharks were predominant in the discards. By-catch of cold-water corals and small glass sponges occurred along the western flank of the Hatton Bank, while large hexactinellids were found along the eastern flank. Longlines fished the adult fraction of vulnerable deep-water sharks and lotids. High catches per unit effort values for these species were obtained in coral areas. A combination of seabird-scaring streamer lines and other measures of preventing seabird by-catch were used. Only one fulmar was captured and it survived. Data on distribution of marine litter and derelict deep-sea gillnets are also presented.
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Jahncke, Jaime, Elisa Goya, and Alex Guillen. "Seabird By-Catch in Small-Scale Longline Fisheries in Northern Peru." Waterbirds: The International Journal of Waterbird Biology 24, no. 1 (April 2001): 137. http://dx.doi.org/10.2307/1522255.

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Gilman, Eric, Nigel Brothers, and Donald R. Kobayashi. "Principles and approaches to abate seabird by-catch in longline fisheries." Fish and Fisheries 6, no. 1 (March 2005): 35–49. http://dx.doi.org/10.1111/j.1467-2679.2005.00175.x.

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GANDINI, PATRICIA, and ESTEBAN FRERE. "The economic cost of seabird bycatch in Argentinean longline fisheries." Bird Conservation International 22, no. 1 (September 26, 2011): 59–65. http://dx.doi.org/10.1017/s0959270911000219.

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SummarySeabird mortality in longline fisheries is believed to be an important cause of the reductions in many seabird populations worldwide, and results in reduced fishing efficiency and economic losses for fishing companies. We estimated the economic cost of not using seabird bycatch deterrents in Argentinean longline fisheries, with the intention of encouraging adoption of mitigation measures in those fisheries. We conducted the study in the Argentine ling Genypterus blacodes and Patagonian toothfish Dissostichus eleginoides fisheries from 2001 to 2006 on three fishing vessels. Data on the incidence of seabird bycatch were collected by seabird observers specially trained in seabird identification and data on the catch rates of target species, cost of bait and fish were provided by the fishing company, supervised by Federal Inspectors from the Provincial Fisheries Agency. To estimate the bait loss, we set lines both with and without the use of deterrents (streamer lines, night setting and strategic discharge of offal) in both fisheries. Seabird bycatch varies temporally and geographically, so to estimate economic losses using deterrents in each fishery, we used different bycatch rates/1000 hooks registered for different periods and fishing areas. Bycatch rates in the absence of deterrents were two birds/1000 hooks and 1.53 birds/1000 hooks for the Patagonian toothfish and ling fisheries, respectively. These rates equate to the loss of more than 1.5 and 2 million dollars over a 10 year period for each fishery. When estimations are made with lower mortality rates, economic losses declined abruptly and were in the order of hundreds of dollars/fishing trip, for the same period of time. Results show that using deterrents, long term profits for the fishing company increase at a considerably high rate (the decrease in monetary loss is an order of magnitude), and the mortality of seabirds decreases by the same proportion (CPUE of seabirds decreases from tens of thousands to a few hundred). In these fisheries, the use of mitigation measures that reduce bait loss and seabird mortality represents a win-win situation with benefits to conservation and fishing companies.
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Dissertations / Theses on the topic "Seabird by-catch"

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Klaer, Neil E., and n/a. "Analysis of seabird by-catch in the Australian Fishing Zone using Japanese longline fishery observer data." University of Canberra. Applied Science, 1998. http://erl.canberra.edu.au./public/adt-AUC20060814.150108.

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Data collected by Australian observers, combined with logbook data supplied by all Japanese vessels fishing in the Australian Fishing Zone were used to estimate the total seabird catch and catch rates (and associated variances) within the Australian Fishing Zone by season and area. The species composition of subsamples of captured seabirds was used in conjunction with the estimates of total by-catch to provide estimates of by-catch by species. The total by-catch of all seabird species by Japanese longline within Australian waters was estimated to be 2,981 (cv 17%) for the 1992 fishing year, 3,590 (cv 15%) in 1993 and 2,817 (cv 19%) in 1994. However, the observed seabird bycatch may underestimate the total number of seabirds killed by 27%. The increase in total seabird by-catch between 1992 and 1993 is partly due to the use of monofilament nylon longline gear by two vessels in 1993, and the decrease from 1993 to 1994 was mainly due to a corresponding reduction in fishing effort. For the three years examined, 78% of the total seabird by-catch was albatrosses, with black-browed albatross (Diomedea melanophrys) and shy albatross (D. cauta) caught in the greatest numbers. Catches of yellow-nosed albatross (D. chlororhynchos), wandering albatross (D. exulans}, and grey-headed albatross (D. chrysostoma) were also substantial. The proportions of individual species caught showed considerable inter-annual variability. Most seabirds caught and killed by longline fishing are captured during line setting. Data collected by the observers were also used to determine the influence of various environmental factors and mitigation measures on seabird catch rates. Generalised linear models were used to determine the statistical significance of the effect of each factor on the seabird catch rate. Results show that the environmental factor that has the most influence is whether line setting was carried out at night or during the day. For the data examined, the chance of catching seabirds during day sets was five times greater than for night sets. For night sets, the chance of catching seabirds during the full half-phase of the moon was five times greater than during the new half-phase. Other environmental factors with significant effects were the area and season fished. Wind, cloud and sea conditions were not found to have a significant influence. Considerable variation in the seabird by-catch rate among vessels was found, which is probably due to differences in their implementation of mitigation measures, as well as the clumped distribution of seabirds by area and time. Interannual variation in the by-catch rate was found to be statistically significant but the differences among years was small in comparison to other factors. An examination of the influence of mitigation measures for sets made during the day in summer in the Tasmanian area showed that the level of bait thawing and unidentified factors related to individual vessels were most significant in determining the seabird by-catch rate, followed by the use of a bait throwing device. It was not possible to examine the influence of the use of bird scaring tori poles and lines as these were used during all sets examined in detail. For this data set, the amount of cloud cover had an influence, while moon phase, sea conditions and wind strength did not.
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Books on the topic "Seabird by-catch"

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Jackson Hill, Diane, and Craig Smith. Windcatcher. CSIRO Publishing, 2019. http://dx.doi.org/10.1071/9781486309887.

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A short-tailed shearwater flies from the edge of the Southern Ocean to the rim of the Arctic Circle – and back – every year. This remarkable 30,000 kilometre journey is driven by seabird law. Instinct and community will guide her. A wingspan the size of a child’s outstretched arms will support her. But first, she must catch the wind … Based on birds that live on Griffiths Island, near Port Fairy, Victoria, Windcatcher is a tale of migration, conservation and survival that begins with one small bird called Hope. Written by award-winning children’s author Diane Jackson Hill and illustrated by Craig Smith, one of Australia’s most prolific and popular illustrators, Windcatcher explores the mysteries of seabird migration. For primary aged readers.
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Book chapters on the topic "Seabird by-catch"

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Stehn, R. A., K. S. Rivera, S. Fitzgerald, and K. D. Woll. "Incidental catch of seabirds by longline fisheries in Alaska." In Seabird Bycatch: Trends, Roadblocks, and Solutions, 61–77. Alaska Sea Grant, University of Alaska Fairbanks, 2001. http://dx.doi.org/10.4027/sbtrs.2001.04.

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B. Makhado, Azwianewi, Rodney Braby, Bruce M. Dyer, Jessica Kemper, Alistair M. McInnes, Desmond Tom, and Robert J.M. Crawford. "Seabirds of the Benguela Ecosystem: Utilisation, Long-Term Changes and Challenges." In Birds - Challenges and Opportunities for Business, Conservation and Research. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96326.

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The Benguela Current is used by c. 82 seabird species, of which seven are endemic to it. Eggs and guano of formerly abundant seabirds were heavily harvested in the 19th and 20th centuries but decreases in seabird populations led to cessation of these industries at islands. Guano is still scraped from platforms. Seabird ecotourism has grown. There were large recent decreases in numbers of African Penguins Spheniscus demersus, Cape Gannets Morus capensis and Cape Phalacrocorax capensis and Bank P. neglectus Cormorants and redistributions of these other species away from the centre of the Benguela ecosystem towards its northern or eastern boundaries. In 2020, seabirds endemic to the Benguela ecosystem and albatrosses and petrels migrating into it had high proportions of globally Near Threatened or Threatened species. The primary threat to four Endangered endemic birds was scarcity of forage resources. A Vulnerable endemic damara tern was susceptible to habitat degradation and disturbance. The principal threat to visiting albatrosses and petrels was by-catch mortality. Identification and effective protection of Important Bird Area breeding and marine foraging and aggregation sites, and a suite of complementary measures, are needed to conserve the seabirds and ensure continuation of their economic and ecosystem benefits into the future.
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"Grenadiers of the World Oceans: Biology, Stock Assessment, and Fisheries." In Grenadiers of the World Oceans: Biology, Stock Assessment, and Fisheries, edited by Stuart Hanchet, Richard O’Driscoll, Sira Ballara, and Alistair Dunn. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874004.ch24.

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<em>Abstract</em>.—An exploratory longline fishery for toothfish (<em>Dissostichus </em>spp.) in the Ross Sea, Antarctica has been carried out since 1997. The main bycatch species in this fishery is the grenadier, <em>Macrourus whitsoni. </em>No assessments have been carried out of the impact of the fishery on grenadiers, although they have life history characteristics that make them vulnerable to overexploitation. The aims of this research were two-fold; firstly, to characterize the bycatch fishery and to determine factors affecting bycatch rates; and secondly to examine potential methods of monitoring its abundance. A standardized CPUE analysis was used to determine factors affecting bycatch rates of grenadiers in the fishery. The analysis was based on fine-scale haul-by-haul data from all vessels in the fishery from 1999 to 2005. The major factors influencing grenadier bycatch were vessel, area, and depth. Catch rates of grenadiers were highest along the continental slope of the Ross Sea in depths from 600 to 1000 m, and there was an order of magnitude difference in grenadier catch rates between different vessels. Examination of vessel characteristics showed that catch rates of grenadiers were significantly lower with the Spanish line system than with the autoline system. There are several plausible reasons for this difference, including hook location with respect to the seabed, bait type, and differences in levels of reporting of bycatch between vessels. Various approaches to monitoring and assessing grenadiers in the Ross Sea fishery were explored. We conclude that the year effect from the standardized CPUE analysis is unlikely to be monitoring abundance but instead probably reflect changes in gear characteristics, fisher behavior, and targeting of effort. Trends in the length composition of the catch are confounded with depth, and are also of limited value at present. We consider that the best approach to obtaining abundance estimates for grenadiers in the Ross Sea would be to carry out a random bottom trawl survey of the continental slope.
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"Grenadiers of the World Oceans: Biology, Stock Assessment, and Fisheries." In Grenadiers of the World Oceans: Biology, Stock Assessment, and Fisheries, edited by Stuart Hanchet, Richard O’Driscoll, Sira Ballara, and Alistair Dunn. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874004.ch24.

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<em>Abstract</em>.—An exploratory longline fishery for toothfish (<em>Dissostichus </em>spp.) in the Ross Sea, Antarctica has been carried out since 1997. The main bycatch species in this fishery is the grenadier, <em>Macrourus whitsoni. </em>No assessments have been carried out of the impact of the fishery on grenadiers, although they have life history characteristics that make them vulnerable to overexploitation. The aims of this research were two-fold; firstly, to characterize the bycatch fishery and to determine factors affecting bycatch rates; and secondly to examine potential methods of monitoring its abundance. A standardized CPUE analysis was used to determine factors affecting bycatch rates of grenadiers in the fishery. The analysis was based on fine-scale haul-by-haul data from all vessels in the fishery from 1999 to 2005. The major factors influencing grenadier bycatch were vessel, area, and depth. Catch rates of grenadiers were highest along the continental slope of the Ross Sea in depths from 600 to 1000 m, and there was an order of magnitude difference in grenadier catch rates between different vessels. Examination of vessel characteristics showed that catch rates of grenadiers were significantly lower with the Spanish line system than with the autoline system. There are several plausible reasons for this difference, including hook location with respect to the seabed, bait type, and differences in levels of reporting of bycatch between vessels. Various approaches to monitoring and assessing grenadiers in the Ross Sea fishery were explored. We conclude that the year effect from the standardized CPUE analysis is unlikely to be monitoring abundance but instead probably reflect changes in gear characteristics, fisher behavior, and targeting of effort. Trends in the length composition of the catch are confounded with depth, and are also of limited value at present. We consider that the best approach to obtaining abundance estimates for grenadiers in the Ross Sea would be to carry out a random bottom trawl survey of the continental slope.
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"Benthic Habitats and the Effects of Fishing." In Benthic Habitats and the Effects of Fishing, edited by R. A. PICKRILL and B. J. TODD. American Fisheries Society, 2005. http://dx.doi.org/10.47886/9781888569605.ch30.

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Multibeam sea floor mapping technologies have provided the capability to accurately, and cost effectively, image large areas of the seabed. Imagery provides base maps of sea floor topography from which targeted surveys can be planned to map sea floor sediments and associated benthic communities. Over the last five years extensive multi-disciplinary surveys have been carried out on Browns, German and Georges Banks. The government of Canada entered into a partnership with the scallop industry to map bathymetry, surficial sediments and benthic communities. The new knowledge has been used by industry, and has implications for fisheries management. Associations between substrate type and benthic community composition have enabled precise maps of scallop habitat to be produced and links between scallop abundance and substrate to be established. The environmental and economic benefits have been immediate, with reduced effort to catch set quota, less bottom disturbance, and containment of fishing activity to known scallop grounds. Stock assessments and management practices are improved. Other pilot projects in Atlantic Canada and the northeastern USA have demonstrated the value of integrated sea floor mapping in designating marine protected areas (The Gully, Stellwagen Bank), in identifying offshore hazards such as landslides, in siting offshore structures, cables and pipelines, and in addressing environmental issues such as the routing of outfalls and disposal of dredge materials. In recognition of the power of these new tools and digital map products, Canada is considering development of a national mapping strategy to provide the foundation for sustainable ocean management in the 21st century.
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Conference papers on the topic "Seabird by-catch"

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Tabeta, Shigeru, and Haruki Yoshimoto. "Investigation of Carbon Budget Around Artificial Upwelling Generator by a Coupled Physical-Biological Model." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29653.

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There are several projects of generating upwelling by artificial structures to enhance the primary production expecting fish catch increase. From the view point of global environment, CO2 budget between atmosphere and ocean due to such technologies are also interesting. In this study, a coupled physical-biological model was developed to simulate the nitrogen and carbon cycles around artificial upwelling generator. The model is focusing on the degradation of particulate organic matter, because the process should much affects on the efficiency of the biological pump. The model is tuned by using the experimental data and applied to simulate the material cycle in the target area which is located north of Ikitsuki Island located northwest of Kyusyu, Japan, where an artificial seabed mound is installed to generate upwelling. The long-term carbon budget is also estimated by vertical one-dimensional ecosystem model using the parameters determined from the results of the three-dimensional coupled physical-biological model.
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