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Journal articles on the topic 'Fishes Tuna fisheries Fish populations Tuna'

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Published: 4 June 2021

Last updated: 16 February 2022

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1

Nugroho, Duto, and Suherman Banon Atmaja. "KEBIJAKAN RUMPONISASI PERIKANAN PUKAT CINCIN INDONESIA YANG BEROPERASI DI PERAIRAN LAUT LEPAS." Jurnal Kebijakan Perikanan Indonesia 5, no. 2 (2013): 97. http://dx.doi.org/10.15578/jkpi.5.2.2013.97-106.

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<p>Penggunaan rumpon laut-dalam telah mengubah taktik dan strategi perikanan pukat cincin pelagis kecil yang beroperasi di perairan dangkal untuk bergeser pada perikanan tuna neritik tropis. Rumponisasi perikanan pukat cincin yang dirancang untuk meningkatkan produktivitas telah menjadi masalah serius pada perikanan neritik tuna. Hal ini terjadi karena tertangkapnya ikan berukuran kecil dalam jumlah yang dominan sehingga dalam jangka panjang akan berpotensi konflik dengan perikanan lainnya. Para ilmuwan yang tergabung dalam pengelolaan perikanan regional merekomendasikan bahwa pengembang

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Castro, C., K. Van Waerebeek, D. Cárdenas, and JJ Alava. "Marine mammals used as bait for improvised fish aggregating devices in marine waters of Ecuador, eastern tropical Pacific." Endangered Species Research 41 (March 12, 2020): 289–302. http://dx.doi.org/10.3354/esr01015.

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Fish aggregating devices (FADs) are floating objects typically used to attract and capture pelagic fish in industrial tuna fisheries. This study documents 9 cases, involving 31 marine mammals, of incidentally captured, killed or otherwise retrieved cetaceans and pinnipeds which were used, or presumably used, as bait for improvised fish aggregation devices (IFAD) by artisanal fishers in coastal Ecuador. At least 3 species of small cetaceans were affected, including pantropical spotted dolphin Stenella attenuata, short-finned pilot whale Globicephala macrorhynchus, pygmy killer whale Feresa atte

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ALGHOZALI, FAQIH AKBAR, DIAH PERMATA WIJAYANTI, and AGUS SABDONO. "Short Communication: Genetic diversity of scalloped hammerhead sharks (Sphyrna lewini) landed in Muncar Fishing Port, Banyuwangi." Biodiversitas Journal of Biological Diversity 20, no. 4 (2019): 1154–59. http://dx.doi.org/10.13057/biodiv/d200430.

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Abstract. Alghozali FA, Wijayanti DP, Sabdono A. 2019. Short Communication: Genetic diversity of scalloped hammerhead sharks (Sphyrna lewini) landed in Muncar Fishing Port, Banyuwangi. Biodiversitas 20: 1154-1159. The majority of sharks caught in Indonesian fisheries were bycatch products from the tuna longline fisheries, but some regions in Indonesia fish the sharks as their main target. One of these regions is located in Muncar, Banyuwangi, which fishes the endangered Scalloped Hammerhead sharks (Sphyrna lewini) as target species. This research aimed to study the genetic diversity of the end

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Shafait, Faisal, Euan S. Harvey, Mark R. Shortis, et al. "Towards automating underwater measurement of fish length: a comparison of semi-automatic and manual stereo–video measurements." ICES Journal of Marine Science 74, no. 6 (2017): 1690–701. http://dx.doi.org/10.1093/icesjms/fsx007.

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Abstract Underwater stereo–video systems are widely used for counting and measuring fish in aquaculture, fisheries, and conservation management. Length measurements are generated from stereo–video recordings by a software operator using a mouse to locate the head and tail of a fish in synchronized pairs of images. This data can be used to compare spatial and temporal changes in the mean length and biomass or frequency distributions of populations of fishes. Since the early 1990s stereo–video has also been used for measuring the lengths of fish in aquaculture for quota and farm management. Howe

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Griffiths, Shane P., Gary C. Fry, Fiona J. Manson, and Richard D. Pillans. "Feeding dynamics, consumption rates and daily ration of longtail tuna (Thunnus tonggol) in Australian waters, with emphasis on the consumption of commercially important prawns." Marine and Freshwater Research 58, no. 4 (2007): 376. http://dx.doi.org/10.1071/mf06197.

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The feeding ecology of longtail tuna was studied in northern and eastern Australia. Diet biomass data were used to estimate daily ration and consumption of individual prey taxa, particularly penaeids targeted by Australia’s valuable Northern Prawn Fishery (NPF). Overall, the 497 stomachs contained 101 prey taxa. In both regions, small pelagic and demersal fishes comprised the majority of the diet biomass. Fish in both regions showed a marked increase in prey diversity, variation in prey composition and stomach fullness index in autumn and winter (March–August). This increase in apparently oppo

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Espenilla, Jacqueline Joyce F. "Sharing Fish: The Philippine Experience." Korean Journal of International and Comparative Law 8, no. 2 (2020): 178–204. http://dx.doi.org/10.1163/22134484-12340136.

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Abstract Straddling and highly migratory fish such as tuna are the subject of immense interest from countries like the Philippines, whose populations are highly dependent on the oceans for both sustenance and livelihood. As these fish are transboundary by nature, they are deemed as “shared resources” that need to be cooperatively managed by country stakeholders in order to safeguard against depletion. This is the primary reason for the increasing number of international fisheries agreements as well as in the sudden prominence of regional fisheries management organizations (RFMO s). In that con

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Senina, Inna, Patrick Lehodey, John Sibert, and John Hampton. "Integrating tagging and fisheries data into a spatial population dynamics model to improve its predictive skills." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 3 (2020): 576–93. http://dx.doi.org/10.1139/cjfas-2018-0470.

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SEAPODYM is a model developed for investigating spatiotemporal dynamics of fish populations under the influence of both fishing and the environment. The model simulates age-structured population dynamics using advection–diffusion–reaction equations describing movement, recruitment, and natural and fishing mortality. The dynamic processes are constrained by environmental data and distributions of prey species. Model parameter estimation using fishing data was implemented earlier based on a maximum likelihood estimation (MLE) approach and adjoint technique. Here, we describe the integration of t

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Hearn, William S., Thomas Polacheck, Kenneth H. Pollock, and Wade Whitelaw. "Estimation of tag reporting rates in agestructured multicomponent fisheries where one component has observers." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 7 (1999): 1255–65. http://dx.doi.org/10.1139/f99-059.

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For many tagging experiments, it is vital that fishers find and report all tags to scientists. If not, the tag reporting rate needs to be estimated so that fishing and natural mortality rates can be estimated. One way to estimate this rate is to have one fishery component (e.g., with observers) report every tag found from all fish that it catches. If the numbers of fish caught by all fishery components are also known and the tagged fish are mixed with the population (or subpopulation) being harvested, then one can estimate the reporting rate of underreporting fishery components. This procedure

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Widodo, Agustinus Anung, Fayakun Satria, and Lilis Sadiyah. "STATUS PEMANFAATAN DAN PENGELOLAAN SUMBERDAYA IKAN TUNA NERITIK DI SAMUDERA HINDIA WPP 572 DAN 573." Jurnal Kebijakan Perikanan Indonesia 6, no. 1 (2014): 23. http://dx.doi.org/10.15578/jkpi.6.1.2014.23-28.

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<p>Dalam rangka mendeskripsikan status pemanfaatan dan pengelolaan sumberdaya tuna neritik di perairan Samudera Hindia (WPP 572 dan 573) telah dilakukan analisis terhadap informasi tentang jenis dan produksi tuna neritik yang disajikan dalam Statistik Perikanan Tangkap di Laut Menurut WPP tahun 2005-2012 (DJPT, 2013) serta data hasil penelitian berbasis di PPS Cilacap dan PPN Sibolga tahun 2011. Rekomendasi ‘working party’ tentang tuna neritik dari IOTC dikaji sebagai langkah pengelolaan perikanan tuna neritik di Indonesia. Hasil analisis dan kajian menunjukkan bahwa sumberdaya ikan tuna

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Jatmiko, Irwan, Fathur Rochman, and Maya Agustina. "VARIASI GENETIK MADIDIHANG (Thunnus albacares; Bonnaterre, 1788) DENGAN ANALISIS MIKROSATELIT DI PERAIRAN INDONESIA." Jurnal Penelitian Perikanan Indonesia 24, no. 3 (2018): 157. http://dx.doi.org/10.15578/jppi.24.3.2018.157-164.

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Madidihang (Thunnus albacares) merupakan spesies yang bermigrasi jauh yang distribusinya di perairan tropis hingga perairan subtropis. Spesies ini ditemukan di Samudra Atlantik, Hindia dan Pasifik. Informasi genetik ikan dengan migrasi jauh seperti tuna penting diketahui untuk kepentingan pemanfaatan secara lestari. Penelitian ini bertujuan untuk memperoleh informasi keragaman genetik dan struktur populasi yang dieksploitasi dan kekerabatan populasi madidihang di perairan Indonesia. Pengumpulan sampel genetik dilakukan di tiga lokasi yaitu di Barat Sumatra, Selatan Bali dan perairan Sulawesi U

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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. Th

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Juan-Jordá, M. J., I. Mosqueira, J. Freire, and N. K. Dulvy. "Population declines of tuna and relatives depend on their speed of life." Proceedings of the Royal Society B: Biological Sciences 282, no. 1811 (2015): 20150322. http://dx.doi.org/10.1098/rspb.2015.0322.

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Larger-bodied species in a wide range of taxonomic groups including mammals, fishes and birds tend to decline more steeply and are at greater risk of extinction. Yet, the diversity in life histories is governed not only by body size, but also by time-related traits. A key question is whether this size-dependency of vulnerability also holds, not just locally, but globally across a wider range of environments. We test the relative importance of size- and time-related life-history traits and fishing mortality in determining population declines and current exploitation status in tunas and their re

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Morse, Molly R., Lisa A. Kerr, Benjamin Galuardi, and Steven X. Cadrin. "Performance of stock assessments for mixed-population fisheries: the illustrative case of Atlantic bluefin tuna." ICES Journal of Marine Science 77, no. 6 (2020): 2043–55. http://dx.doi.org/10.1093/icesjms/fsaa082.

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Abstract Accounting for movement and mixing in stock assessment is important for managing sustainable fisheries, particularly for highly migratory species. However, many fisheries management approaches continue to use single-stock, single-area models to assess mixed-population stocks that are known to have complex movement dynamics. We evaluated a single-stock, single-area stock assessment model’s performance on fishery pseudodata generated using a spatially complex operating model that incorporates movement and mixing of simulated Atlantic bluefin tuna-like populations. Structural model missp

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Campana, Steven E. "Transboundary movements, unmonitored fishing mortality, and ineffective international fisheries management pose risks for pelagic sharks in the Northwest Atlantic." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 10 (2016): 1599–607. http://dx.doi.org/10.1139/cjfas-2015-0502.

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The shortfin mako (Isurus oxyrinchus), porbeagle (Lamna nasus), and blue shark (Prionace glauca) are three frequently caught shark species in the northwestern Atlantic Ocean. Satellite tagging studies show that all three species range widely across many national boundaries but spend up to 92% of their time on the high seas, where they are largely unregulated and unmonitored. All are caught in large numbers by swordfish and tuna fishing fleets from a large number of nations, usually unintentionally, and all are unproductive by fish standards, which makes them particularly sensitive to fishing p

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Lehodey, P., J. Alheit, M. Barange, et al. "Climate Variability, Fish, and Fisheries." Journal of Climate 19, no. 20 (2006): 5009–30. http://dx.doi.org/10.1175/jcli3898.1.

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Abstract Fish population variability and fisheries activities are closely linked to weather and climate dynamics. While weather at sea directly affects fishing, environmental variability determines the distribution, migration, and abundance of fish. Fishery science grew up during the last century by integrating knowledge from oceanography, fish biology, marine ecology, and fish population dynamics, largely focused on the great Northern Hemisphere fisheries. During this period, understanding and explaining interannual fish recruitment variability became a major focus for fisheries oceanographer

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Bardey, Daniel Jonathan. "Overfishing: pressure on our oceans." Research in Agriculture Livestock and Fisheries 6, no. 3 (2020): 397–404. http://dx.doi.org/10.3329/ralf.v6i3.44805.

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An increased demand for fish, combined with ever-growing global populations our oceans cannot keep up with the rate at which we are fishing our seas. As coastal fisheries declined, fishing started to expand into using open oceans as a resource leading to an 80% decline in bluefin tuna (Thunnus thynnus) and swordfish (Xiphias gladius) in just 5 years. Though overfishing for specific species can be beneficial, and even more surprisingly it’s encouraged. Off the coast of America, a new threat has been growing in recent years, the red lion fish (Pterois volitans). This species originally native to

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Steadman, David W., and Sharyn Jones. "Long-Term Trends in Prehistoric Fishing and Hunting on Tobago, West Indies." Latin American Antiquity 17, no. 3 (2006): 316–34. http://dx.doi.org/10.2307/25063055.

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AbstractWe compare the bone assemblages of Milford 1 (TOB-3) and Golden Grove (TOB-13) in Tobago, West Indies. Milford 1 is a small preceramic occupation (ca. 3000-2800 cal B.P.), whereas Golden Grove is a large ceramic-period village (ca. 1700-900 cal B.P.). Species richness at TOB-13 is greater than at TOB-3, both in marine (67 vs. 39 fishes) and terrestrial (32 vs. 9) taxa. Major shifts in marine exploitation from the preceramic to ceramic periods can be seen in relative abundance of tuna, toadfishes, and in fishes inhabiting mangrove and brackish water environments, and decreases in relati

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Shahul Hameed, Pentam Veli Pura, Aliyyathumada Ishyyapura Muhsin, Pathummathada Pookoya, and Kutty Ranjeet. "Length–weight analysis of ten species (Actinopterygii) supporting subsistence fishery in Lakshadweep waters, southern Arabian Sea." Acta Ichthyologica et Piscatoria 51, no. 3 (2021): 257–61. http://dx.doi.org/10.3897/aiep.51.e64632.

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The length–weight relations of ten fish species representing eight genera and four families and that formed the backbone of the subsistence fishery in the Lakshadweep islands were estimated. These fishes which included four species of tuna [Katsuwonus pelamis (Linnaeus, 1758); Thunnus albacares (Bonnaterre, 1788); Auxis thazard (Lacepède, 1800); Euthynnus affinis (Cantor, 1849)], three species of needlefishes[Ablennes hians (Valenciennes, 1846); Tylosurus crocodilus (Péron et Leseur, 1821); Tylosurus acus melanotus (Bleeker, 1850)], two species of bait fishes [Spratelloides delicatulus (Bennet

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Shahul Hameed, Pentam Veli Pura, Aliyyathumada Ishyyapura Muhsin, Pathummathada Pookoya, and Kutty Ranjeet. "Length–weight analysis of ten species (Actinopterygii) supporting subsistence fishery in Lakshadweep waters, southern Arabian Sea." Acta Ichthyologica et Piscatoria 51, no. 3 (2021): 257–61. http://dx.doi.org/10.3897/aiep.51.64632.

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The length–weight relations of ten fish species representing eight genera and four families and that formed the backbone of the subsistence fishery in the Lakshadweep islands were estimated. These fishes which included four species of tuna [Katsuwonus pelamis (Linnaeus, 1758); Thunnus albacares (Bonnaterre, 1788); Auxis thazard (Lacepède, 1800); Euthynnus affinis (Cantor, 1849)], three species of needlefishes[Ablennes hians (Valenciennes, 1846); Tylosurus crocodilus (Péron et Leseur, 1821); Tylosurus acus melanotus (Bleeker, 1850)], two species of bait fishes [Spratelloides delicatulus (Bennet

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Pertiwi, Lia Amelia, Hadi Susilo, and Nurullah Asep Abdilah. "Microbiological and formaline test on the big eye tuna (Thunnus obesus Lowe, 1839) from fish auction place (TPI) and moving fish trader (PIK) in Panimbang Pandeglang Village Banten." Biological Environment and Pollution 1, no. 1 (2021): 38–45. http://dx.doi.org/10.31763/bioenvipo.v1i1.391.

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Big Eye Tuna (Thunnus obesus Lowe, 1839) is one of the fish species that can increase sources of animal protein and has high economic value in the world of trade because it is the second-largest export commodity after shrimp. The purpose of this study was to test the content of microbial and formalin contamination in the flesh of T. obesus fish from the Fish Auction Place (TPI) and Mobile Fish Trader (PIK) in Panimbang Village, Pandeglang, Banten. The research was carried out at the Regional Technical Implementation Unit (UPTD) Testing and Application of Quality of Fishery Products, Department

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Farley, Jessica H., Naomi P. Clear, Bruno Leroy, Tim L. O. Davis, and Geoff McPherson. "Age, growth and preliminary estimates of maturity of bigeye tuna, Thunnus obesus, in the Australian region." Marine and Freshwater Research 57, no. 7 (2006): 713. http://dx.doi.org/10.1071/mf05255.

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Biological parameters such as age, growth and age (or size) at maturity are vital for accurate stock assessments and management plans to ensure that fisheries develop sustainably. Despite this, very few validated age studies have been conducted for large tropical pelagic species within the Australian region. Age and growth parameters were estimated for bigeye tuna, Thunnus obesus (Lowe, 1839), sampled from longline fisheries in the Australian region using validated techniques based on counts of annual increments. Poor increment clarity reduced the number of otoliths included in the final analy

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Yusfiandayani, Roza, Mulyono S. Baskoro, and Daniel Monintja. "IMPACT OF FISH AGGREGATING DEVICE ON SUSTAINABLE CAPTURE FISHERIES." KnE Life Sciences 2, no. 1 (2015): 224. http://dx.doi.org/10.18502/kls.v1i0.107.

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The use of rumpon, a type of Fish Aggregating Device (FAD), has been traditional in Indonesia, particularly in eastern Indonesia waters since time immemorial (Reuter 1938; Nasution et al. 1986; Monintja 1976). The traditional tuna fishermen in Mamuju waters in the Province of South Celebes have used rumpons for a long time, although there is no record when the device was first used (Nasution et al. 1986). Any structure designed or made to attract free schooling fishes: rumpon (Indonesia), tendak (West Java), uncang (Sumatera), rompong (Sulawesi), payaos (Philippines). Local fishermen claimed t

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Ladino, Felipe, Sandra Martínez, María Duarte, Natalia Vélez, and Sandra Bessudo. "Monitoring of the status of eleven bony and cartilaginous fish populations in the Malpelo Sanctuary of Fauna and Flora, Colombian Pacific." Boletín de Investigaciones Marinas y Costeras 50, no. 1 (2021): 105–20. http://dx.doi.org/10.25268/bimc.invemar.2021.50.1.1084.

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To determine trends over time in the relative abundance of species prioritized in the Malpelo Fauna and Flroa Sanctuary Management Plan, underwater visual censuses were done from April 2009 to August 2019. Data were collected for five species of bonefish: bluefin trevally (Caranx melampygus), longfin yellowtail (Seriola rivoliana), yellowfin tuna (Thunnus albacares), leather bass (Dermatolepis dermatolepis) and sailfin grouper (Mycteroperca olfax), and six cartilaginous fish: spotted eagle ray (Aetobatus laticeps), silky shark (Carcharhinus falciformis), Galapagos shark (Carcharhinus galapagen

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Maunder, Mark N., John R. Sibert, Alain Fonteneau, John Hampton, Pierre Kleiber, and Shelton J. Harley. "Interpreting catch per unit effort data to assess the status of individual stocks and communities." ICES Journal of Marine Science 63, no. 8 (2006): 1373–85. http://dx.doi.org/10.1016/j.icesjms.2006.05.008.

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AbstractDespite being one of the most common pieces of information used in assessing the status of fish stocks, relative abundance indices based on catch per unit effort (cpue) data are notoriously problematic. Raw cpue is seldom proportional to abundance over a whole exploitation history and an entire geographic range, because numerous factors affect catch rates. One of the most commonly applied fisheries analyses is standardization of cpue data to remove the effect of factors that bias cpue as an index of abundance. Even if cpue is standardized appropriately, the resulting index of relative

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Rick, Torben, Virginia L. Harvey, and Michael Buckley. "Collagen fingerprinting and the Chumash billfish fishery, Santa Barbara Channel, California, USA." Archaeological and Anthropological Sciences 11, no. 12 (2019): 6639–48. http://dx.doi.org/10.1007/s12520-019-00930-4.

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AbstractBillfish from the families Xiphiidae (swordfish) and Istiophoridae (marlins and sailfish) are large, often pelagic fishes that are highly migratory. Although some billfish have been the target of global commercial and sport fisheries for decades, prehistoric billfish foraging is relatively rare, but includes systematic swordfish (Xiphias gladius) and/or striped marlin (Kajikia audax) exploitation in the Santa Barbara Channel region of California, the Gulf of Maine, and the northern coast of Chile. While whole vertebrae, rostra, and other elements can often be identified to species, fra

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Tsai, Wen-Pei, Chi-Lu Sun, Sheng-Ping Wang, and Kwang-Ming Liu. "Evaluating the impacts of uncertainty on the estimation of biological reference points for the shortfin mako shark, Isurus oxyrinchus, in the north-western Pacific Ocean." Marine and Freshwater Research 62, no. 12 (2011): 1383. http://dx.doi.org/10.1071/mf11010.

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Biological reference points (BRPs) are commonly used to assess the harvest level and stock status of marine fish populations. However, BRP estimates may be influenced by uncertainties about life-history parameters and fishing practices. The shortfin mako shark, Isurus oxyrinchus, is one of the most important by-catch species for tuna longline fisheries; however, its stock status remains poorly understood. To understand its population dynamics, the present study examined fishery statistics data and biological measurements of the shortfin mako in the north-western Pacific, and evaluated the impa

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Dharmadi, Dharmadi, Mas Tri Djoko Sunarno, and Isa Nagib Edrus. "PERIKANANDANASPEKBIOLOGI IKANPARI LAMPENGAN, Mobula japanica DI PERAIRANSELATAN JAWA." BAWAL Widya Riset Perikanan Tangkap 3, no. 6 (2017): 369. http://dx.doi.org/10.15578/bawal.3.6.2011.369-376.

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Ikan pari merupakan salah satu jenis ikan yang banyak didaratkan berasal dari Selatan Jawa. Salah satu jenis ikanpari yang belum banyak dilakukan penelitian adalah ikan pari lampengan (Mobula japanica). Tujuan penelitian ini adalah untuk mengetahui tentang perikanan dan aspek biologi jenis ikan tersebut di perairan Selatan Jawa sebagai informasi dasar bagi penentuan kebijakan pengelolaan perikanan Elasmobranchii. Penelitian menggunakan metode survei yang berlangsung dari Januari hingga Desember 2010 di Pelabuhan Perikanan Samudera Cilacap-Jawa Tengah. Sejumlah 165 ikan pari yang tertangkap ole

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Mira, Mira, and Subhechanis Saptanto. "PENGARUH KEBIJAKAN PERUBAHAN TARIF IMPOR TERHADAP KINERJA SEKTOR KELAUTAN DAN PERIKANAN." Jurnal Kebijakan Sosial Ekonomi Kelautan dan Perikanan 7, no. 1 (2018): 13. http://dx.doi.org/10.15578/jksekp.v7i1.5745.

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Adapun tujuan dari penelitian ini adalah melihat pengaruh kebijakan perubahan tarif impor terhadap kinerja sektor kelautan dan perikanan. Data dari tabel Input dan Output dianalisis dengan menggunakan computable general equilibrium mode (CGE). Simulasi dilakukan dengan Focus Group Discussion, pertama menggunakan tarif impor yang berlaku saat ini untuk produk perikanan yaitu sebesar 5%, kedua menggunakan tarif impor 10 persen jika tarjadi peningkatan tarif, dan ketiga menggunakan tarif 0 % dimana terjadi penurunan tarif impor karena kesepakatan kerjasama regional (Masyarakat Ekonomi Asean). Aki

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Pérez, Géraldine, Laurent Dagorn, Jean-Louis Deneubourg, et al. "Effects of habitat modifications on the movement behavior of animals: the case study of Fish Aggregating Devices (FADs) and tropical tunas." Movement Ecology 8, no. 1 (2020). http://dx.doi.org/10.1186/s40462-020-00230-w.

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Abstract Background Aggregation sites represent important sources of environmental heterogeneity and can modify the movement behavior of animals. When these sites are artificially established through anthropogenic actions, the consequent alterations to animal movements may impact their ecology with potential implications for their fitness. Floating objects represent important sources of habitat heterogeneity for tropical tunas, beneath which these species naturally aggregate in large numbers. Man-made floating objects, called Fish Aggregating Devices (FAD), are used by fishers on a massive sca

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Townhill, Bryony L., Elena Couce, James Bell, Stuart Reeves, and Oliver Yates. "Climate Change Impacts on Atlantic Oceanic Island Tuna Fisheries." Frontiers in Marine Science 8 (February 23, 2021). http://dx.doi.org/10.3389/fmars.2021.634280.

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Climate change is already affecting the distributions of marine fish, and future change is expected to have a particularly large impact on small islands that are reliant on the sea for much of their income. This study aims to develop an understanding of how climate change may affect the distribution of commercially important tuna in the waters around the United Kingdom’s Overseas Territories in the South Atlantic. The future suitable habitat of southern bluefin, albacore, bigeye, yellowfin and skipjack tunas were modelled under two future climate change scenarios. Of all the tunas, the waters

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AL MALIK, M. DANIE, NI PUTU DIAN PERTIWI, ANDRIANUS SEMBIRING, NI LUH ASTRIA YUSMALINDA, ENEX YUNIARTI NINGSIH, and IDA AYU ASTARINI. "Short Communication: Genetic structure of Longtail Tuna Thunnus tonggol (Bleeker, 1851) in Java Sea, Indonesia." Biodiversitas Journal of Biological Diversity 21, no. 8 (2020). http://dx.doi.org/10.13057/biodiv/d210828.

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Abstract. Al Malik MD, Pertiwi NPD, Sembiring A, Yusmalinda NLA, Ningsing EY, Astarini IA. 2020. Short Communication: Genetic structure of Longtail Tuna Thunnus tonggol (Bleeker, 1851) in Java Sea, Indonesia. Biodiversitas 21: 3637-3643. Thunnus tonggol (Longtail Tuna) is an economically important fish found in Indonesia waters, however, the information regarding this fish is lacking. Known to be a neritic fish and found in shallow water, Java Sea is one of the ideal habitats for T. tonggol species. Due to high fishing rates activities in Java Sea, a better management plan to ensure the conser

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Filmalter, John D., Robert K. Bauer, Fabien Forget, Paul D. Cowley, and Laurent Dagorn. "Movement behaviour and fishery interaction of silky sharks (Carcharhinus falciformis) in the tropical tuna purse seine fishery in the Western Indian Ocean." ICES Journal of Marine Science, June 21, 2021. http://dx.doi.org/10.1093/icesjms/fsab119.

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Abstract The silky shark Carcharhinus falciformis regularly associates with floating objects in the open ocean, resulting in relatively high levels of bycatch in industrial tuna purse seine fisheries using drifting fish aggregating devices (FADs). This bycatch has contributed to concerns regarding the sustainability of this fishery and its impact on silky shark populations. To investigate fishery interactions, movements of 28 silky sharks (86–235 cm TL, mean = 118 cm) fitted with pop-up and archival tags in the western Indian Ocean, between 2010 and 2012, were examined. Monthly overlap between

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Receveur, Aurore, Valerie Allain, Frederic Menard, et al. "Modelling Marine Predator Habitat Using the Abundance of Its Pelagic Prey in the Tropical South-Western Pacific." Ecosystems, August 10, 2021. http://dx.doi.org/10.1007/s10021-021-00685-x.

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AbstractUnderstanding the ecological mechanisms underpinning distribution patterns is vital in managing populations of mobile marine species. This study is a first step towards an integrated description of the habitats and spatial distributions of marine predators in the Natural Park of the Coral Sea, one of the world’s largest marine-protected areas at about 1.3 million km2, covering the entirety of New Caledonia’s pelagic waters. The study aims to quantify the benefit of including a proxy for prey abundance in predator niche modelling, relative to other marine physical variables. Spatial dis

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Brophy, Deirdre, Naiara Rodríguez-Ezpeleta, Igaratza Fraile, and Haritz Arrizabalaga. "Combining genetic markers with stable isotopes in otoliths reveals complexity in the stock structure of Atlantic bluefin tuna (Thunnus thynnus)." Scientific Reports 10, no. 1 (2020). http://dx.doi.org/10.1038/s41598-020-71355-6.

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Abstract Atlantic bluefin tuna (Thunnus thynnus) from the two main spawning populations in the Mediterranean and Gulf of Mexico occur together in the western, central and eastern Atlantic. Stock composition of catches from mixing areas is uncertain, presenting a major challenge to the sustainable management of the fisheries. This study combines genetic and chemical markers to develop an integrated method of population assignment. Stable isotope signatures (δ13C and δ18O) in the otolith core of adults from the two main spawning populations (adult baselines) showed less overlap than those of yea

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