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Academic literature on the topic 'Operation Whalers, 2005'
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Journal articles on the topic "Operation Whalers, 2005"
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Tixier, Paul, Jade Vacquie Garcia, Nicolas Gasco, Guy Duhamel, and Christophe Guinet. "Mitigating killer whale depredation on demersal longline fisheries by changing fishing practices." ICES Journal of Marine Science 72, no. 5 (2014): 1610–20. http://dx.doi.org/10.1093/icesjms/fsu137.
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Abstract Odontocete depredation on longlines involves socioeconomic and conservation issues with significant losses for fisheries and potential impacts on wild populations of depredating species. As technical solutions to this conflict are limited and difficult to implement, this study aimed to identify fishing practices that could reduce odontocete depredation, with a focus on killer whales (Orcinus orca) interacting with Patagonian toothfish (Dissostichus eleginoides) longliners off the Crozet islands. Data collected by fishery observers from 6013 longline sets between 2003 and 2013 allowed us to statistically detect the significant influence of five operational variables using GLMMs. The probability of interactions between vessels and killer whales was decreased by (i) the number of vessels operating simultaneously in the area: the limited number of depredating killer whales may induce a dilution effect with increased fleet size, and (ii) depth of longline sets: vessels operating in shallow waters may be more accessible to whales that are initially distributed on peri-insular shelves. The cpue was negatively influenced by (iii) length of longlines: longer sets may provide killer whales access to a greater proportion of hooked fish per set, and positively influenced by (iv) hauling speed: increased speed may shorten the time during which toothfish are accessible to whales during hauling. The time it takes for killer whales to reach vessels was positively correlated to (v) the distance travelled between longline sets with an estimated threshold of 100 km beyond which whales seem to temporarily lose track of vessels. These findings provide insightful guidelines about what fishing strategy to adopt given these variables to reduce killer whale depredation here and in similar situations elsewhere. To a greater extent, this study is illustrative of how collaborative work with fishermen in a fully controlled fishery framework may lead to the definition of cost-limited and easy-to-implement mitigation solutions when facing such human-wildlife conflict.
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Laran, Sophie, and Alexandre Gannier. "Spatial and temporal prediction of fin whale distribution in the northwestern Mediterranean Sea." ICES Journal of Marine Science 65, no. 7 (2008): 1260–69. http://dx.doi.org/10.1093/icesjms/fsn086.
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Abstract Laran, S. and Gannier, A. 2008. Spatial and temporal prediction of fin whale distribution in the northwestern Mediterranean Sea. – ICES Journal of Marine Science, 65: 1260–1269. Understanding the distribution of the cetaceans is crucial to improving their conservation. Therefore, a prediction model of fin whale’s (Balaenoptera physalus) summer distribution was developed from data collected between May and August, in the Pelagos Mediterranean Marine Mammals Sanctuary. Explanatory variables were selected by multiple logistic regression, among several physiographic and oceanographic parameters. Depth, chlorophyll (Chl a) concentration, and sea surface temperature (SST) were selected for characterizing fin whale presence. Remote sensing imagery (Chl a and SST) was used at an 8-d resolution to capture short-term environmental variability. With the selection of a presence/absence threshold by the receiver operating characteristic curve, a correct classification of 70% (49% for presence, 85% for absence) was achieved for the initial dataset. Model reliability was also tested on an independent dataset, collected in the northwestern Basin; a correct classification of 71% (41% for presence prediction, 86% for absence prediction) was obtained. This study contributes to an understanding of where fin whales might concentrate to feed in summer. Weekly predictions of their distribution represent a valuable conservation tool in a marine protected area, for example to prevent collisions with ships.
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Laidre, Kristin L., Patrick J. Heagerty, Mads Peter Heide-Jørgensen, Lars Witting, and Malene Simon. "Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches." ICES Journal of Marine Science 66, no. 10 (2009): 2253–66. http://dx.doi.org/10.1093/icesjms/fsp191.
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Abstract Laidre, K. L., Heagerty, P. J., Heide-Jørgensen, M. P., Witting, L., and Simon, M. 2009. Sexual segregation of common minke whales (Balaenoptera acutorostrata) in Greenland, and the influence of sea temperature on the sex ratio of catches. – ICES Journal of Marine Science, 66: 2253–2266. The harvest of common minke whales (Balaenoptera acutorostrata) in West Greenland has historically been skewed towards female whales, yet a complete analysis of spatial and temporal patterns of catch sex ratio has never been conducted. We examined trends in the sex ratio of catches over time, season, space, and relative to sea temperature using 2400 records from inshore Greenland subsistence whaling operations (1960–2006) and 2072 records from offshore Norwegian commercial operations (1968–1985). Logistic regression models were developed to examine the trend in sex ratio in three regions (Northwest, NW; Central West, CW; Southwest, SW) and by latitude. The highly skewed proportion of females in all catches was strongly positively correlated (r2 = 0.8) with latitude in the offshore catches (>100 km). Generalized linear models of inshore catches indicated slightly increasing though non-significant trends in the proportion of females taken off CW and NW Greenland and a significant declining trend off SW Greenland. Sensitivity analyses show that the declining inshore SW trend was entirely accounted for by the past 5 years (2002–2006) of data. Models containing both year and temperature interactions suggested that either parameter provided an equivalent explanation of the variation in trends across regions.
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Passadore, Cecilia, Andrés Domingo, María Szephegyi, and Eduardo R. Secchi. "Influence of environmental and longline fishing operational variables on the presence of killer whales (Orcinus orca) in south-western Atlantic." Journal of the Marine Biological Association of the United Kingdom 94, no. 6 (2012): 1267–76. http://dx.doi.org/10.1017/s002531541200166x.
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Killer whale (Orcinus orca) is frequently encountered in coastal and high productive pelagic waters, near the shelf break. In the south-western Atlantic Ocean, spatial and temporal occurrence patterns are poorly known. However, the monitoring of the interaction between killer whales and longline fishery suggests that the species is frequent in this region. We analysed the killer whale presence within the Uruguayan pelagic longline fishing zone. Data were collected from 1996 to 2007, during 2189 fishing events, by vessel skippers and on-board observers. We estimated the sighting rate (SR = sightings days/fishing days * 100) for different time scales and in 1 × 1 degree grids. Generalized linear models were used to evaluate the effect of spatial, temporal, environmental and operational variables on the species presence. Killer whales were sighted in 100 fishing days (SR = 4.5%), this occurrence being explained by distance from shore and sea surface temperature, varying among months and fishing boats. Although sightings occurred year round, they were more frequent in autumn and winter, at 150–400 nautical miles (nm) from shore (mean = 250 nm) and in waters with temperatures ranging from 19 to 24°C (mean = 22°C). Sets took place between 19°–40°S and 21°–54°W, while killer whales occurred mostly from 34°–37°S and 48°–53°W. In this region, the high productive Brazil—Malvinas Confluence Zone is located, and concentrates fishing effort and also killer whales.
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Simonis, Anne E., Robert L. Brownell, Bruce J. Thayre, et al. "Co-occurrence of beaked whale strandings and naval sonar in the Mariana Islands, Western Pacific." Proceedings of the Royal Society B: Biological Sciences 287, no. 1921 (2020): 20200070. http://dx.doi.org/10.1098/rspb.2020.0070.
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Mid-frequency active sonar (MFAS), used for antisubmarine warfare (ASW), has been associated with multiple beaked whale (BW) mass stranding events. Multinational naval ASW exercises have used MFAS offshore of the Mariana Archipelago semi-annually since 2006. We report BW and MFAS acoustic activity near the islands of Saipan and Tinian from March 2010 to November 2014. Signals from Cuvier's ( Ziphius cavirostris) and Blainville's beaked whales ( Mesoplodon densirostris ), and a third unidentified BW species, were detected throughout the recording period. Both recorders documented MFAS on 21 August 2011 before two Cuvier's beaked whales stranded on 22–23 August 2011. We compared the history of known naval operations and BW strandings from the Mariana Archipelago to consider potential threats to BW populations. Eight BW stranding events between June 2006 and January 2019 each included one to three animals. Half of these strandings occurred during or within 6 days after naval activities, and this co-occurrence is highly significant. We highlight strandings of individual BWs can be associated with ASW, and emphasize the value of ongoing passive acoustic monitoring, especially for beaked whales that are difficult to visually detect at sea. We strongly recommend more visual monitoring efforts, at sea and along coastlines, for stranded cetaceans before, during and after naval exercises.
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Escalle, Lauriane, Daniel Gaertner, Pierre Chavance, Alicia Delgado de Molina, Javier Ariz, and Bastien Mérigot. "Forecasted consequences of simulated FAD moratoria in the Atlantic and Indian Oceans on catches and bycatches." ICES Journal of Marine Science 74, no. 3 (2016): 780–92. http://dx.doi.org/10.1093/icesjms/fsw187.
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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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Findlay, Abigail. "Practical Considerations in the Recovery of Oil from Sunken and Abandoned Vessels." International Oil Spill Conference Proceedings 2003, no. 1 (2003): 161–66. http://dx.doi.org/10.7901/2169-3358-2003-1-161.
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ABSTRACT The world has a legacy from its maritime history; sunken vessels from wars, casualties from accidents and storms and abandoned vessels from former marine operations. All have the potential to be environmental “time bombs” if left to their own devices. In recent years there have been a number of operations to investigate and potentially salvage these wrecks, some of which are in increasingly poor condition and beginning to show signs of structural failure. Operations such as the Blucher in Norway, Royal Oak in Scapa Flow, UK, and the Erika in the Bay of Biscay have all presented technological and environmental challenges to salvors. This paper will investigate one such operation that has presented a unique set of challenges, namely the recovery of the fuel oil from a collection of whale catchers abandoned in Grytviken harbour in the South Atlantic. The extreme remoteness of the location has meant that the operation can only be carried out after a number of detailed surveys. The logistics issues of transporting the personnel and the equipment to the island were a major consideration in the planning of the operation. All potential scenarios had to be considered in advance and contingencies put in place since additional or replacement equipment would not be readily available either at a nearby location or within a reasonable timescale. The issues of safety of personnel, access to the vessels and the handling of equipment on to the vessels all had to be addressed. The removal of the oil, its subsequent temporary storage and its ultimate disposal will all be covered in the paper. The whole operation is set against the backdrop of one of the worlds’ wilderness areas which is in the process of being rejuvenated after the ravages of both natural events and manmade activities.
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Jayne Lyman, Erica, and Olivier Jamin. "Japan’s Introduction from the Sea of Sei Whale Meat: the Breaking Point of CITES?" International Journal of Law and Public Administration 1, no. 1 (2018): 68. http://dx.doi.org/10.11114/ijlpa.v1i1.3379.
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A cornerstone of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) is the exertion of market control when a species’ biological status is put at risk by commercial demand. This is the crux of an Appendix I listing under CITES; once a species is listed on Appendix I it may not be imported or introduced from the sea in order to be used for primarily commercial purposes. As CITES has evolved and strengthened over its forty three-year history, the Parties have agreed specific compliance measures and policy initiatives targeted toward both building upon and supporting this cornerstone. And, yet, one decision at the upcoming Standing Committee puts at risk the reputation and integrity on which CITES stands.Since 2002 Japan has introduced from the sea sei whales and sold the meat, blubber, and other products commercially in order to raise money to support its whaling operations. Because Japan does not have a reservation for the North Pacific population of sei whale, which is listed on Appendix I, Japan’s actions are in clear contravention of the Convention. The question is whether the Standing Committee is willing to hold Japan accountable for nearly 20 years of non-compliance in a demonstration of the integrity and reputation of the Convention or whether politics and power triumph.
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Shedd, Taylor, Allison Northey, and Shawn Larson. "Epimeletic behaviour in a Southern Resident Killer Whale (Orcinus orca)." Canadian Field-Naturalist 134, no. 4 (2021): 316–20. http://dx.doi.org/10.22621/cfn.v134i4.2555.
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Southern Resident Killer Whale (SRKW, Orcinus orca) may be found year round in the Salish Sea. These orcas comprise three matrilineal pods (J, K, and L) and were listed as Endangered under the Canadian Species at Risk Act in 2003 and under the United States Endangered Species Act in 2005 because of prey scarcity, vessel noise and disturbance, small population size, and exposure to toxins. Since 1993, the Whale Museum has been operating Soundwatch, a boater education program for vessels. Soundwatch personnel are on the water in the central Salish Sea throughout the summer educating boaters on how to maneuver near marine mammals legally and documenting vessel regulation violations and marine mammal presence and behaviour. Starting on 24 July 2018, Soundwatch documented an adult female SRKW of J pod (J35) carrying a dead neonate calf. J35 continued to carry her dead calf for 17 consecutive days covering ~1600 km. Her story riveted the attention of the people of the Salish Sea as well as people around the world, evoking empathy for J35 and her loss as well as the plight of the Endangered SRKW population. Here, we tell her story and evaluate whether the behaviour J35 displayed toward her dead calf was an example of epimeletic behaviour, animal grief.
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Kuningas, Sanna, Petter H. Kvadsheim, Frans-Peter A. Lam, and Patrick J. O. Miller. "Killer whale presence in relation to naval sonar activity and prey abundance in northern Norway." ICES Journal of Marine Science 70, no. 7 (2013): 1287–93. http://dx.doi.org/10.1093/icesjms/fst127.
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Abstract Kuningas, S., Kvadsheim, P. H., Lam, F-P. A., and Miller, P. J. O. 2013. Killer whale presence in relation to naval sonar activity and prey abundance in northern Norway. – ICES Journal of Marine Science, 70: . In this study, retrospective data on naval sonar activity and prey abundance were correlated with killer whale sightings within a fjord basin in northern Norway. In addition, passive acoustic and visual marine mammal surveys were conducted before, during, and after a specific navy exercise in 2006. Herring abundance was the main factor affecting killer whale presence. Naval sonar, either operational navy sonar exercises (Flotex) or experimental sonar activity (CEE) alone, did not explain killer whale occurrence. However, naval sonar activity during a period of low prey availability seemed to have had a negative effect on killer whale presence. We conclude that the level of reaction to sonar can be influenced by multiple factors, including availability of prey.
Books on the topic "Operation Whalers, 2005"
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Victory point: Operations Red Wings and Whalers : Marine Corps' battle for freedom in Afghanistan. Berkley Caliber, 2009.
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Marie, Bettridge Shannon Olivia, and United States. National Marine Fisheries Service, eds. Vessel operations in right whale protection areas in 2009. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 2010.
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Victory Point: Operations Red Wings and Whalers - the Marine Corps' Battle for Freedom in Afghanistan. Dutton Caliber, 2010.