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Journal articles on the topic 'Lobster sector'
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1
Silva, K. C. A., R. Cruz, I. H. A. Cintra, and F. A. Abrunhosa. "Structure and diversity of the lobster community on the Amazon continental shelf." Crustaceana 86, no. 9 (2013): 1084–102. http://dx.doi.org/10.1163/15685403-00003227.
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The present study analyses the diversity and community structure of the lobsters captured using bottom trawl shrimp nets at depths of 41 to 626 m during fishery prospection cruises conducted between 1996 and 1998. The study area encompasses the coasts of the Brazilian states of Amapá and Pará, which were divided into two sectors, to the north and to south of Cape North. The 44 lobster specimens identified belonged to nine species: Acanthacaris caeca (A. Milne-Edwards, 1881), Nephropsis aculeata Smith, 1881, Nephropsis rosea Bate, 1888, Palinustus truncatus A. Milne-Edwards, 1880, Panulirus argus (Latreille, 1804), Parribacus antarcticus (Lund, 1793), Polycheles typhlops Heller, 1862, Scyllarides delfosi Holthuis, 1960 and Stereomastis sculpta (Smith, 1880). The specimens were captured preferentially on muddy sand substrates in the northern sector and gravelly and muddy sand in the southern sector. All species were more common in the northern sector during the dry season (June-November), and in the southern sector in the rainy season (December-May).
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Turnbull, Alison, Juan José Dorantes-Aranda, Tom Madigan, Jessica Jolley, Hilary Revill, Tim Harwood, and Gustaaf Hallegraeff. "Field Validation of the Southern Rock Lobster Paralytic Shellfish Toxin Monitoring Program in Tasmania, Australia." Marine Drugs 19, no. 9 (September 8, 2021): 510. http://dx.doi.org/10.3390/md19090510.
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Paralytic shellfish toxins (PST) are found in the hepatopancreas of Southern Rock Lobster Jasus edwardsii from the east coast of Tasmania in association with blooms of the toxic dinoflagellate Alexandrium catenella. Tasmania’s rock lobster fishery is one of the state’s most important wild capture fisheries, supporting a significant commercial industry (AUD 97M) and recreational fishing sector. A comprehensive 8 years of field data collected across multiple sites has allowed continued improvements to the risk management program protecting public health and market access for the Tasmanian lobster fishery. High variability was seen in toxin levels between individuals, sites, months, and years. The highest risk sites were those on the central east coast, with July to January identified as the most at-risk months. Relatively high uptake rates were observed (exponential rate of 2% per day), similar to filter-feeding mussels, and meant that lobster accumulated toxins quickly. Similarly, lobsters were relatively fast detoxifiers, losing up to 3% PST per day, following bloom demise. Mussel sentinel lines were effective in indicating a risk of elevated PST in lobster hepatopancreas, with annual baseline monitoring costing approximately 0.06% of the industry value. In addition, it was determined that if the mean hepatopancreas PST levels in five individual lobsters from a site were <0.22 mg STX equiv. kg−1, there is a 97.5% probability that any lobster from that site would be below the bivalve maximum level of 0.8 mg STX equiv. kg−1. The combination of using a sentinel species to identify risk areas and sampling five individual lobsters at a particular site, provides a cost-effective strategy for managing PST risk in the Tasmanian commercial lobster fishery.
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Harding, Gareth C., and Ronald W. Trites. "Dispersal of Homarus americanus Larvae in the Gulf of Maine from Browns Bank." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 3 (March 1, 1988): 416–25. http://dx.doi.org/10.1139/f88-050.
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Studies of larval lobster (Homarus americanus) distribution off southwestern Nova Scotia during the summers of 1977 and 1978, were used to estimate an average larval recruitment or production of 1918 and 5284 stage IV lobsters per square kilometre per year inshore and offshore, respectively. Results indicate that the offshore may contribute up to 97% of the larval recruits for the entire southwestern Nova Scotia region. Current patterns and velocities of 3–16 cm∙s−1 were estimated from surface drifter returns within the Gulf of Maine. Limits of larval dispersion are estimated from surface currents in the region and the physiological and ecological traits of the larval lobster. Offshore lobsters could make an important contribution to recruitment not only off southwestern Nova Scotia but in the entire eastern sector of the Gulf of Maine to Casco Bay. Larval dispersal provides another line of evidence that the Gulf of Maine area represents one lobster recruitment center. Our results are consistent with the idea that ontogenic seasonal migration of female lobsters has evolved to locate planktotrophic larvae in warmer shoal areas where growth and survival is optimal and from which ocean currents subsequently disperse a large portion of these larvae to settle over highly productive juvenile grounds.
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Triyanti, Riesti, and Risna Yusuf. "ANALISIS MANAJEMEN RANTAI PASOK LOBSTER (Studi Kasus di Kabupaten Simeulue, Aceh)." Jurnal Sosial Ekonomi Kelautan dan Perikanan 10, no. 2 (June 20, 2016): 203. http://dx.doi.org/10.15578/jsekp.v10i2.1260.
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Kabupaten Simeulue sebagai daerah kepulauan memiliki potensi perikanan yang cukup besar namun pemanfaatannya masih tergolong rendah. Kontribusi sektor perikanan terhadap PDRB Kabupaten Simeulue hanya mencapai 2,20 persen selama tujuh tahun terakhir meskipun dari sisi nilai laju pertumbuhan naik secara signifikan (19,12 %). Penelitian ini bertujuan untuk memetakan rantai pasok lobster di Kabupaten Simeulue yang meliputi interaksi sosial ekonomi dan kontribusi antar pelaku usaha yang terlibat. Pengumpulan data dilakukan melalui wawancara terhadap pelaku usaha yang terlibat serta Badan Karantina Ikan, Pengendalian Mutu, dan Keamanan Hasil Perikanan (BKIPMKHP) Wilayah Kerja Simeulue. Data hasil wawancara dilengkapi hasil observasi dan dokumentasi, selanjutnya diolah dan disajikan secara deskriptif. Hasil penelitian menunjukkan bahwa rantai pasok lobster terdiri dari nelayan/ pembudidaya (100%) → supplier (100%) → eksportir (90%) dan konsumen lokal (10%) → konsumen luar negeri (100%) serta terdiri dari tujuh pemetaan dalam manajemen rantai pasok. Permasalahan yang terjadi adalah makin menurunnya volume lobster yang di pasok, adanya monopoli harga oleh eksportir, aksesilibitas pasar yang terbatas pada produsen, penerapan teknologi (penyimpanan dan pengiriman) hanya pada eksportir, dan belum adanya kelembagaan keuangan formal yang menjamin harga lobster lebih tinggi. Manajemen rantai pasok lobster dapat menjadi bahan kebijakan untuk pemerintah daerah Kabupaten Simeulue dalam peningkatan pendapatan dan kesejahteraan nelayan maupun pembudidaya lobster. (Analysis of Lobster Supply Chain Management (Case Study in Simeulue District, Aceh))Simeulue islands have a large fisheries potential, but its use is still relatively low. Contribution of the fisheries sector to Simeulue’s GDP only reached 2.20 per cent over the last seven years despite of the value of the growth rate increased significantly (19.12%). The aim of this studi is to map lobster supply chain in Simeulue Island which includes economic and social interaction among business actors involved. Data collected through interviews with businesses and Agency for fish quarantine, quality control and safety of fish product work area in Simeulue District. Interviewed data are compounded by the results of observation and documentation. Data were processed and presented descriptively. Results of the study showed that the supply chain lobster consists of: fishers/farmers (100%) → supplier (100%) → exporters (90%) and local consumers (10%) → consumers abroad (100%) and consists of seven mapping in management supply chain. The problem that occurs is decreasing of volume supplied lobster, pricing monopoly by exporters, limited market accessibility by producer, application of technology (storage and delivery) only on exporters, and financial institution that guarantees higher lobster prices are not available. Lobster supply chain management can be a policy concern for the local government district of Simeulue in increasing the income and prosperity lobster fishers and farmers.
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Ton Nu Hai, Au, and Stijn Speelman. "Involving stakeholders to support sustainable development of the marine lobster aquaculture sector in Vietnam." Marine Policy 113 (March 2020): 103799. http://dx.doi.org/10.1016/j.marpol.2019.103799.
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Gasca, Rebeca, and Heyden Manzanilla-Dominguez. "Distribution and Abundance of Phyllosoma Larvae (Decapoda, Palinuridae) in the Southern Gulf of Mexico and the Western Caribbean Sea." Crustaceana 77, no. 1 (2004): 75–93. http://dx.doi.org/10.1163/156854004323037900.
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AbstractFrom plankton samples collected during two oceanographic expeditions in the southern Gulf of Mexico (1991) and five in the Mexican Caribbean Sea, we studied the composition, abundance, and distribution of the phyllosoma larvae. A total of 118 phyllosomas belonging to five species of lobster were recorded. Panulirus argus was the most abundant and dominant, it represented 73.9% of the total number of phyllosomas collected, followed by Scyllarides aequinoctialis (18.0%). The phyllosomas were distributed mainly in the coastal areas, with decreasing densities oceanwards. Highest larval concentrations were recorded near the outer border of the Campeche Bank shelf in the southern Gulf of Mexico. In the Mexican Caribbean area, phyllosomas were most abundant around Banco Chinchorro, off Espiritu Santo Bay and Ascension Bay, and near Isla Mujeres; these are well-known spawning areas for the spiny lobster, P. argus and are indicated by the presence of the earliest larval stages. The oldest larvae were concentrated on the Campeche Bank; this was attributed to the effect of a local gyre that retains these larvae. The youngest phyllosomas tended to have an oceanic distribution thus allowing them to enter the oceanic system of mesoscale gyres of the Gulf. In the Mexican Caribbean the coastal shoreward currents seem to act as a retention system for lobster larvae. The distribution of the phyllosoma stages in the Caribbean area suggests a continuous presence of different stages year-round. Some of these larvae, in the northeastern sector, would likely be transported to the Campeche Bank.
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Ulisses, Cláudia, Marciana Morais, Marta R. Barbosa, Cynthia C. Albuquerque, Lilia Willadino, and Terezinha R. Camara. "Physiological development of zygotic embryos of heliconias propagated in vitro and conventionally." Horticultura Brasileira 36, no. 2 (June 2018): 229–34. http://dx.doi.org/10.1590/s0102-053620180214.
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ABSTRACT The aim of this study is to compare physiological development of Heliconia bihai cv. Lobster Claw Two plants derived from in vitro culture of zygotic embryos and conventional propagation. Heliconias obtained from rhizomes and from in vitro multiplication were evaluated every 30 days during ten months under greenhouse conditions. The experimental design was completely randomized, with ten repetitions, and the 2x10 factorial arrangement consisted of two plant multiplication methods and ten evaluations performed at different times. The analyzed biometric parameters were plant height, number of leaves, number of tillers, leaf area, and color intensity in the bracts. Plants derived from in vitro culture showed significant differences in the development of the evaluated physiological parameters in comparison to plants derived from rhizomes, and they also showed early flowering. Although the in vitro cultured plants were derived from zygotic embryos, no morphological changes were found in the vegetative and reproductive parts (inflorescence) of the plants or in the colorimetry. It shows that the in vitro cultures of zygotic embryos may be used as a technique to produce seedlings on a large-scale, thus allowing the floriculture sector to grow in the region and all over the country.
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Hall, Norman G. "Delay-difference model to estimate the catch of different categories of the western rock lobster (Panulirus cygnus) for the two stages of the annual fishing season." Marine and Freshwater Research 48, no. 8 (1997): 949. http://dx.doi.org/10.1071/mf97109.
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The annual exploitation rate of the limited-entry rock lobster fishery of Western Australia is controlled by constraining the total allowable effort. An important aspect of the harvest strategy introduced in 1993 was the use of annual levels of allowed fishing effort that could be varied in accordance with predicted levels of recruitment to the fishery in order to increase the abundance of spawning females and to reduce the variability in the level of annual catch. A model was needed that could examine the impact of alternative management strategies on the catches both within and between fishing seasons. The model that has been developed uses a delay-difference structure in which the fishing season is divided into two periods. Growth between the periods, and over the closed fishing season, is determined from tagging data. Recruitment is estimated from the observed levels of puerulus settlement. The model has been fitted to the observed effort within the southern sector of the fishery. This model allows the evaluation of alternative levels of fishing effort within the management zone, providing managers and industry with a tool to explore alternative harvest strategies.
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Hutton, T., E. I. van Putten, S. D. Pascoe, R. A. Deng, É. E. Plagányi, and D. Dennis. "Trade-offs in transitions between indigenous and commercial fishing sectors: the Torres Strait tropical rock lobster fishery." Fisheries Management and Ecology 23, no. 6 (November 23, 2016): 463–77. http://dx.doi.org/10.1111/fme.12186.
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Fondo, Esther N., and Benrick Ogutu. "Sustainable crab fishery for Blue Economy in Kenya." Aquatic Ecosystem Health & Management 24, no. 1 (January 2, 2021): 21–26. http://dx.doi.org/10.14321/aehm.024.01.05.
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Abstract Lakes, rivers and oceans provide unique resources and support fisheries and aquaculture worldwide. The fisheries and aquaculture sector of Kenya contributes approximately 0.8% to the country’s GDP. Marine production is about 9 000 tonnes per year. Marine finfish form the bulk of the marine production, while shellfish (e.g. prawns, lobsters and crabs), molluscs (e.g. octopi and squids) are underexploited. The Fishery sector has the potential of about USD 5 billion for the Blue Economy in Kenya. Crab fishery in Kenya is active in some areas of the south and north coast. The crab resources along the Kenyan waters are diverse and a variety of species are edible. The most commonly fished crab by artisanal fishers is the Mangrove Mud Crab Scylla serrata. Semi-commercial and industrial fishers usually have portunid and other deep sea crabs as by-catch in trawl and longline fisheries, which in many cases are unutilized. Exports of live crabs have increased over the years, with exports mainly to Asian countries. Export of frozen crabs started recently. The need to sustainably utilize lake, river and ocean resources is recognized and important in promoting Blue Economy. Sustainable development of crab fishery provides a potential area for the Blue Economy development in Kenya. Research is essential to crab fishery development.
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Schultz, Lisen, Carl Folke, Henrik Österblom, and Per Olsson. "Adaptive governance, ecosystem management, and natural capital." Proceedings of the National Academy of Sciences 112, no. 24 (June 16, 2015): 7369–74. http://dx.doi.org/10.1073/pnas.1406493112.
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To gain insights into the effects of adaptive governance on natural capital, we compare three well-studied initiatives; a landscape in Southern Sweden, the Great Barrier Reef in Australia, and fisheries in the Southern Ocean. We assess changes in natural capital and ecosystem services related to these social–ecological governance approaches to ecosystem management and investigate their capacity to respond to change and new challenges. The adaptive governance initiatives are compared with other efforts aimed at conservation and sustainable use of natural capital: Natura 2000 in Europe, lobster fisheries in the Gulf of Maine, North America, and fisheries in Europe. In contrast to these efforts, we found that the adaptive governance cases developed capacity to perform ecosystem management, manage multiple ecosystem services, and monitor, communicate, and respond to ecosystem-wide changes at landscape and seascape levels with visible effects on natural capital. They enabled actors to collaborate across diverse interests, sectors, and institutional arrangements and detect opportunities and problems as they developed while nurturing adaptive capacity to deal with them. They all spanned local to international levels of decision making, thus representing multilevel governance systems for managing natural capital. As with any governance system, internal changes and external drivers of global impacts and demands will continue to challenge the long-term success of such initiatives.
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Pizarro, Valeria, Sara C. Rodríguez, Mateo López-Victoria, Fernando A. Zapata, Sven Zea, Claudia T. Galindo-Martínez, Roberto Iglesias-Prieto, Joseph Pollock, and Mónica Medina. "Unraveling the structure and composition of Varadero Reef, an improbable and imperiled coral reef in the Colombian Caribbean." PeerJ 5 (December 14, 2017): e4119. http://dx.doi.org/10.7717/peerj.4119.
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Coral reefs are commonly associated with oligotrophic, well-illuminated waters. In 2013, a healthy coral reef was discovered in one of the least expected places within the Colombian Caribbean: at the entrance of Cartagena Bay, a highly-polluted system that receives industrial and sewage waste, as well as high sediment and freshwater loads from an outlet of the Magdalena River (the longest and most populated river basin in Colombia). Here we provide the first characterization of Varadero Reef’s geomorphology and biological diversity. We also compare these characteristics with those of a nearby reference reef, Barú Reef, located in an area much less influenced by the described polluted system. Below the murky waters, we found high coral cover of 45.1% (±3.9; up to 80% in some sectors), high species diversity, including 42 species of scleractinian coral, 38 of sponge, three of lobster, and eight of sea urchin; a fish community composed of 61 species belonging to 24 families, and the typical zonation of a Caribbean fringing reef. All attributes found correspond to a reef that, according to current standards should be considered in “good condition”. Current plans to dredge part of Varadero threaten the survival of this reef. There is, therefore, an urgent need to describe the location and characteristics of Varadero as a first step towards gaining acknowledgement of its existence and garnering inherent legal and environmental protections.
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Bisack, Kathryn D., and Gisele M. Magnusson. "Spatial Management to Reduce Entanglement Risk to North Atlantic Right Whales in Fishing Gear: A Case Study of U.S. Northeast Lobster Fishery 2002–2009." Frontiers in Marine Science 8 (September 10, 2021). http://dx.doi.org/10.3389/fmars.2021.540966.
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Despite the use of gear requirements and access restrictions to manage lobster fishery interactions with north Atlantic right whales since 1997, the population is likely below 370 animals. The Dynamic Area Management (DAM) program (2002–2009) used “real-time” right whale sightings data to provide temporary protection using closures or whale-modified-gear to reduce entanglement. Our ex-post evaluation uses a flexible framework to identify strengths and weaknesses of the program. Biological and economic implications of the program are evaluated using a relative risk of entanglement index (RREI) calculated with spatially and temporally explicit data on density of right whales and fishing effort. An illustrative closure optimization model demonstrates the trade-offs between the non-monetary benefits of risk reduction and the opportunity cost of closures under alternative decision rules (benefit-ranking and cost-effectiveness). Annual aerial sampling to detect DAM areas was low (<3%), yet in some months’ the 17% of area covered by all northeast right whale management areas encompassed up to 70% of the region’s population. Despite their small spatial footprint, dynamic and static measures may have reduced total risk by 6.5% on average, and DAM zones may have created an indirect economic incentive for some fishers to adopt the whale-modified-gear. Similar RREI index values in some months with inverse levels of fishing effort and whale presence highlight the need to consider fishing and whales jointly to reduce risk. These temporal-spatial patterns are critical in policy instrument design. Further, optimization results illustrate how different decision rules can attain equivalent non-monetary benefits of risk reduction at different opportunity costs to industry; the implications of whale-modified-gear and compliance factors are explored. We recommend that DAMs be considered as part of a suite of policy instruments, and highlight how recent technological advances may support lower cost data collection and faster implementation given limited public sector budgets. This case study highlights the need for evaluation of past policy instruments with a lens beyond biological outcomes, and sets the stage for further empirical analysis to better understand harvester responses to management measures designed to protect right whales and the resulting private and public sector trade-offs.
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Prastiyo, Slamet Eko, Irham Irham, Suhatmini Hardyastuti, and Jamhari Jamhari. "The Impact of Regional Policy and Population Growth on Environmental Kuznets Curve for Agricultural Sector in Indonesia: A Provincial Dynamic Panel Data Analysis." Current World Environment, August 12, 2020, 364–70. http://dx.doi.org/10.12944/cwe.15.2.14.
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The present study was undertaken to record the diversity of Balapur pond of the Prayagraj district of Uttar Pradesh with special reference to vertebrates and angiosperms. The Balapur pond was surveyed in detail once in a month for a period of one year from January 2018 to December 2018. The survey reflects a rich and flourishing biodiversity of the pond studied including 40 chordate species and 38 species of angiosperms. The notable chordate diversity includes 12 species of fishes, 2 species of amphibians, 7 species of reptiles, 11 species of birds and 8 species of mammals. Besides, several species of annelids, crabs, butterflies, moths, grasshoppers, ants, termites, lobsters, snails, other gastropods, planktons, algae, bryophytes and pteridophytes have also been observed.
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Cramer, Katie L., and John N. Kittinger. "Reef Conservation off the Hook: Can Market Interventions Make Coral Reef Fisheries More Sustainable?" Frontiers in Marine Science 8 (August 17, 2021). http://dx.doi.org/10.3389/fmars.2021.675274.
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The overexploitation of coral reef fisheries threatens the persistence of reef ecosystems and the livelihoods and food security of millions of people. Market-based initiatives to increase fisheries sustainability have been widely implemented in industrialized commodity fisheries, but the suitability of these initiatives for coral reef fisheries has not been systematically investigated. Here, we present a typology of market-based interventions and coral reef fisheries sectors and identity promising approaches for each fishery archetype. For high value, export-oriented reef fisheries that are highly unsustainable (live reef food fish and dried sea cucumbers), traditional regulatory efforts including trade restrictions will be most effective. For high-value, export-oriented fisheries for highly fecund invertebrates (lobsters and mollusks), certification and ratings efforts, fishery improvement projects, and sustainable purchasing commitments can improve fishing practices and increase fisher market access and revenue. For lower-value fisheries targeting species for domestic or regional consumption, sustainable purchasing commitments among local buyers, consumer awareness campaigns, and local certification and ratings schemes hold promise for shifting attitudes toward sustainability and increasing food security for local communities. Finally, fisher empowerment efforts including direct access to local markets and market information, training on improved post-harvest methods, and formation of fisher associations hold promise for increasing fisher incomes, reducing wasteful catch, increasing food security, and de-incentivizing unsustainable practices. Despite the potential of market-based interventions, specific approaches must be carefully tailored to the ecological and social reality of these systems, including the inherent unsustainability of commercial coral reef fisheries, the limited capacity for fisheries governance, the limited financial support of market-based initiatives, and the threatened status of coral reef ecosystems globally.