Acceder

Bibliografías temáticas / Dredges / Artículos de revistas

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Dredges.

Artículos de revistas sobre el tema "Dredges"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "Dredges".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Lyubimov, Victor Ivanovich, Nikolay Frolovich Popov, and Grigory Ivanovich Sapunov. "Review and analysis of operation of best domestic and foreign river dredgers." Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, no. 2 (2020): 39–53. http://dx.doi.org/10.24143/2073-1574-2020-2-39-53.

Texto completo

Resumen

The article analyzes the development and modernization of energy and technological equipment, as well as soil productivity of dredging projects of both foreign and domestic manufacturers of dredging equipment. The emphasis has been placed on the installation and use of submersible pumps. The productivity of soil dredges has been found to increase due to changes in the design of soil sampling devices and soil pumps. The main characteristics of the American river dredgers with hydraulic cultivators and domestic river diesel dredgers with hydraulic soil cultivators have been considered and evalua

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Gaspar, M. B., F. Leitão, M. N. Santos, et al. "A comparison of direct macrofaunal mortality using three types of clam dredges." ICES Journal of Marine Science 60, no. 4 (2003): 733–42. http://dx.doi.org/10.1016/s1054-3139(03)00023-7.

Texto completo

Resumen

Abstract The white clam Spisula solida is harvested along the entire coast of Portugal using mechanical dredges. In this study, the total direct mortality of the macrobenthic community caused by three types of clam dredges (north dredge—ND, traditional dredge—TD, and the metallic grid dredge—GD) used in the S. solida fishery was determined and compared. The relationship between mortality and catching efficiency for each type of dredge was also assessed. Our results showed significant differences for total direct mortality between the ND and both the GD and TD dredges. This difference was large

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Ouwerkerk, M. R., P. R. H. Verbeek, and T. Schut. "A NEW TOOL FOR LARGE-SCALE OIL COMBAT." International Oil Spill Conference Proceedings 1995, no. 1 (1995): 855B—857. http://dx.doi.org/10.7901/2169-3358-1995-1-855b.

Texto completo

Resumen

ABSTRACT Trailing suction hopper dredges maintain ports and their entrance channels around the world. Several of these dredges have already operated as oil spill cleanup vessels as a secondary assignment. Different types of available oil spill response systems were applied. Recent developments allow these dredges to use their own dredge pumps, making these vessels by far the largest capacity oil spill cleanup vessels available in the world. The add-on system requires no modifications of the vessel and a relatively low investment. Tests have documented very good performance.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Alessi, Marissa A., Peter G. Chirico, Sindhuja Sunder, and Kelsey L. O’Pry. "Detection and Monitoring of Small-Scale Diamond and Gold Mining Dredges Using Synthetic Aperture Radar on the Kadéï (Sangha) River, Central African Republic." Remote Sensing 15, no. 4 (2023): 913. http://dx.doi.org/10.3390/rs15040913.

Texto completo

Resumen

Diamond and gold mining has been practiced by artisanal miners in the Central African Republic (CAR) for decades. The recent introduction of riverine dredges indicates a transition from artisanal/manual digging and sorting techniques to small-scale mining methods. This study implements a remote sensing analysis of Synthetic Aperture Radar (SAR) data to map gold and diamond dredges operating on the Kadéï (Sangha) river in the CAR. Riverine vessels are identified in Sentinel-1 SAR data between 2015 and 2019, and their activity levels are mapped over time. The number of active dredges identified

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Currie, David R., and Gregory D. Parry. "Impacts and efficiency of scallop dredging on different soft substrates." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 4 (1999): 539–50. http://dx.doi.org/10.1139/f98-194.

Texto completo

Resumen

Impacts of scallop dredges and their efficiency were examined experimentally in three areas with different soft substrates in Port Phillip Bay, southeastern Australia. Physical and biological changes were measured on large (600 × 600 m) experimental plots that were dredged with an intensity and duration similar to normal fishing operations. Dredges were most efficient on soft, flat, muddy sediments (51-56% of commercial-sized scallops caught) and least efficient on firm, sandy sediments with more topographic variation (38-44%). Dredging flattened all plots, but changes to topography were most

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Fenton, Mairi, Claire L. Szostek, Adam Delargy, et al. "Catch yield and selectivity of a modified scallop dredge to reduce seabed impact." PLOS ONE 19, no. 5 (2024): e0302225. http://dx.doi.org/10.1371/journal.pone.0302225.

Texto completo

Resumen

Global scallop fisheries are economically important but are associated with environmental impacts to seabed communities resulting from the direct physical contact of the fishing gear with the seabed. Gear modifications attempting to reduce this contact must be economically feasible such that the catch numbers for the target species is maintained or increased. This study investigated the outcome of reducing seabed contact on retained catch of scallops and bycatch by the addition of skids to the bottom of the collecting bag of scallop dredges. We used a paired control experimental design to inve

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Vasconcelos, Paulo, António Morgado-André, Carlos Morgado-André, and Miguel B. Gaspar. "Shell strength and fishing damage to the smooth clam (Callista chione): simulating impacts caused by bivalve dredging." ICES Journal of Marine Science 68, no. 1 (2010): 32–42. http://dx.doi.org/10.1093/icesjms/fsq149.

Texto completo

Resumen

Abstract Vasconcelos, P., Morgado-André, A., Morgado-André, C., and Gaspar, M. B. 2011. Shell strength and fishing damage to the smooth clam (Callista chione): simulating impacts caused by bivalve dredging. – ICES Journal of Marine Science, 68: 32–42. The smooth clam Callista chione is exploited by a fleet of dredgers along the southwestern coast of Portugal and suffers from a high incidence of shell damage. The force required to break C. chione shells in relation to fishing impacts and dredge damage is quantified. Fishing trials and shell-strength measurements (compression and compaction expe

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Greene, Paul, George Follett, and Clint Henker. "Munitions and Dredging Experience on the United States Coast." Marine Technology Society Journal 43, no. 4 (2009): 127–31. http://dx.doi.org/10.4031/mtsj.43.4.2.

Texto completo

Resumen

AbstractA number of dredging projects have unknowingly and unfortunately encountered munitions and explosives of concern (MEC). MEC have been discovered on dredges (e.g., in dragheads, cutterheads, pump casings) and at the dredged material placement site. Detonations have occurred that have either damaged the dredge plant or have even sunk the dredging vessel. A number of recent dredging projects have proactively addressed MEC issues before the start of construction, thereby greatly reducing overall risk and MEC cleanup costs. This paper explains common dredging equipment, discusses techniques

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Thorarinsdóttir, Gudrun G., Larry Jacobson, Stefan Áki Ragnarsson, Elena Guijarro Garcia, and Karl Gunnarsson. "Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model." ICES Journal of Marine Science 67, no. 2 (2009): 345–54. http://dx.doi.org/10.1093/icesjms/fsp236.

Texto completo

Resumen

AbstractThorarinsdóttir, G. G., Jacobson, L., Ragnarsson, S. Á., Garcia, E. G., and Gunnarsson, K. 2010. Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model. – ICES Journal of Marine Science, 67: 345–354. Estimates of capture efficiency and size selectivity for commercial dredges are important in estimating stock biomass and setting catch limits for the ocean quahog off Iceland and the United States. Ocean quahogs are long-lived, slow-growing, and sensitive to overharvest resulting

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Veale, L. O., A. S. Hill, S. J. Hawkins, and A. R. Brand. "Distribution and damage to the by-catch assemblages of the northern Irish Sea scallop dredge fisheries." Journal of the Marine Biological Association of the United Kingdom 81, no. 1 (2001): 85–96. http://dx.doi.org/10.1017/s0025315401003435.

Texto completo

Resumen

The major by-catch species retained during twice yearly dredge surveys of great scallop, Pecten maximus, and queen scallop, Aequipecten opercularis, (both Mollusca: Pectinidae) populations on 13 fishing grounds in the northern Irish Sea, over a period of five years, were identified and enumerated. Additionally, the damage sustained by the by-catch was assessed and related to a range of physical parameters recorded during the survey. A number of species captured in the spring-toothed dredges exhibited differences in abundance and damage sustained between years, and also between the start and en

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Malanga, G. "The French Dredges." Literary Imagination 4, no. 3 (2002): 436–37. http://dx.doi.org/10.1093/litimag/4.3.436.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Anon. "Krupp's bucketwheel dredges." Oceanographic Literature Review 45, no. 1 (1998): 157. https://doi.org/10.1016/s0967-0653(98)80749-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Dudinskii, Fedor, Boris Talgamer, and Nikolai Murzin. "Justifying the parameters of dredging in various types of stopes and massive productive strata." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, no. 3 (May 14, 2020): 5–14. http://dx.doi.org/10.21440/0536-1028-2020-3-5-14.

Texto completo

Resumen

Introduction. Due to a wide variety of placer dredging conditions, traditional methods of dredging parameters calculation do not always take into account all aspects of productive strata mining. It is first of all true for deep placers operation and mining with side cuts. Research aim is to improve the methods of calculating dredging parameters and the capacity of pilesupported bucket chain dredgers. Methodology. Existing methods of calculating dredging parameters and dredgers capacity do not take into account the applied mining method, stope type, and upper stope cave-in conditions. The indic

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Alessi, Marissa A., Peter G. Chirico, and Marco Millones. "Artisanal Mining River Dredge Detection Using SAR: A Method Comparison." Remote Sensing 15, no. 24 (2023): 5701. http://dx.doi.org/10.3390/rs15245701.

Texto completo

Resumen

Challenges exist in monitoring artisanal and small-scale mining (ASM) activities, given their dynamic and often informal nature. ASM takes form through various techniques and scales, including riverine dredging, which often targets the abundant alluvial gold deposits in South America. Remote sensing offers a solution to improve data collection, regulation, and monitoring of the more mobile and elusive ASM activities and their impacts. Mapping ASM riverine dredges using Synthetic Aperture Radar (SAR) is one of the application areas least explored. Three semi-automated detection approaches using

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Johnsen, Espen, and Alf Harbitz. "Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge." ICES Journal of Marine Science 70, no. 2 (2013): 379–86. http://dx.doi.org/10.1093/icesjms/fss202.

Texto completo

Resumen

Abstract Johnsen, E., and Harbitz, A. 2013. Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge – ICES Journal of Marine Science, 70: 379–386. The lesser sandeel (Ammodytes marinus) remains burrowed for long periods in the seabed in sandy areas, and its habitat preference is reflected in a large-scale (10 km) patchy distribution in the North Sea. The small-scale spatial structure of sandeels in the seabed is less known. In this study, it was found that sandeel catches in grabs and dredges fit gamma distributions with a common shape parameter on both a

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Neitman, L. N., M. M. Fridman, N. N. Kozhevnikov, and F. P. Tsurgan. "Equipping dredges with submersible pumps." Hydrotechnical Construction 28, no. 1 (1994): 53–57. http://dx.doi.org/10.1007/bf01545102.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Setiawan, Rachman. "PARAMETRIC ANALYSIS ON OFF-SHORE DREDGING PROCESS USING CUTTER SUCTION DREDGERS." ASEAN Engineering Journal 6, no. 1 (2015): 37–46. http://dx.doi.org/10.11113/aej.v6.15477.

Texto completo

Resumen

Nowadays, cutter-suction dredgers are widely used in off-shore tin mining around South East Asia region, especially in Indonesia. So far, the effectiveness of the dredging process is arguably due to the skills and experience of individuals who operate the dredgers. No sufficient guidelines, standard operating procedures exist on how to operate the dredgers effectively based on scientific facts and factual data on the mining environment. This paper discusses the effectiveness of the dredging process in a cutter suction dredger (CSD). The influence of various parameters is studied through parame

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Cores, Claudia, Miguel B. Gaspar, and Karim Erzini. "Estimating the density of Pennant's swimming crab, Portumnus latipes (Pennant, 1777) in the swash zone using baited stakes and area of attraction." Journal of the Marine Biological Association of the United Kingdom 99, no. 4 (2018): 887–90. http://dx.doi.org/10.1017/s002531541800067x.

Texto completo

Resumen

AbstractWe used a new, easy to use, highly selective, low impact and cheap method of sampling in the swash zone of a sandy beach to obtain catch per unit effort data (CPUE) for Pennant's swimming crab, Portumnus latipes (Pennant, 1777). Metal stakes baited with sardines were used to attract the crabs that were caught by hand. Crab density was estimated based on area of attraction and maximum CPUE and compared with estimates from bivalve dredges used at depths from 3 to 6.5 m. The baited stake method gave an estimate of 0.026 crabs m−2, which is comparable to bivalve dredge estimates (0.0059–0.

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Pfarrer, V. H. "THE HYDRAULIC DREDGING AND PUMPING OF LAKE AREA DEPOSITS." Coastal Engineering Proceedings 1, no. 4 (2000): 21. http://dx.doi.org/10.9753/icce.v4.21.

Texto completo

Resumen

First let me say that it is a sincere pleasure and an honor to address such a distinguished audience. More people should be made aware of the work that you are doing in the protection of our shores and coastline. It is a great satisfaction to me to he associated with an industry that is instrumental in rebuilding our shores along the lines of your extensive studies and recommendations. I recall laboring over the trochoidal wave theory in my study of naval architecture quite a few years ago. Frankly, it is not used very much in dredge design except in the larger molded form sea going hopper dre

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Roshchupkin, D. V. "Excavation of heavy soils by dredges." Hydrotechnical Construction 21, no. 4 (1987): 194–97. http://dx.doi.org/10.1007/bf01429611.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Ogorodnikov, S. P., N. N. Kozhevnikov, and A. E. Kulakov. "Submersible axial-flow pumps for dredges." Hydrotechnical Construction 29, no. 10 (1995): 574–77. http://dx.doi.org/10.1007/bf02443046.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Arcandra, _., Robert E. Randall, and Moo H. Kim. "Dynamic Analysis of a Semisubmersible-type Bucket Ladder Dredge." Marine Technology and SNAME News 36, no. 03 (1999): 143–56. http://dx.doi.org/10.5957/mt1.1999.36.3.143.

Texto completo

Resumen

A semisubmersible-type bucket ladder dredge is a candidate to satisfy the need of the Indonesian tin mining company, PT Timah, to recover tin deposits in water depths of 50 m and deeper. Their current vessel is a barge-type bucket ladder dredge capable of operating in depths shallower than only 30 m. In order to evaluate the dredging capability in 50 m water depth, a dynamic analysis of both semisubmersible-type and barge-type bucket ladder dredges was conducted. The vessel was designed by modifying an existing semisubmersible platform used in the oil and gas industry, while the barge-type use

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Child, C. Allan, and G. R. Harbison. "A Parasitic Association Between a Pycnogonid and a Scyphomedusa in Midwater." Journal of the Marine Biological Association of the United Kingdom 66, no. 1 (1986): 113–17. http://dx.doi.org/10.1017/s0025315400039680.

Texto completo

Resumen

The feeding habits and host specificities of the Pycnogonida are poorly known. These usually small, cryptically coloured animals are difficult to observe alive and are mostly collected fortuitously in gross samples taken from trawls and dredges. Any association between the pycnogonids and their food is disrupted in the trawl. Further, the possibility that some of the pycnogonids may have been captured in the water column rather than on the bottom cannot be ascertained from trawl and dredge samples. King (1973) lists only twelve records of pycnogonids actually seen browsing on food organisms. M

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Harms, CA, SM Boylan, BA Stacy, JF Beasley, D. García-Párraga, and MH Godfrey. "Gas embolism and massive blunt force trauma to sea turtles entrained in hopper dredges in North and South Carolina, USA." Diseases of Aquatic Organisms 142 (December 17, 2020): 189–96. http://dx.doi.org/10.3354/dao03542.

Texto completo

Resumen

Decompression sickness (DCS) has been described mainly in loggerhead turtles Caretta caretta bycaught in trawls and gillnets. Here we present cases of gas emboli (GE) in 8 green turtles Chelonia mydas and 2 Kemp’s ridleys Lepidochelys kempii entrained in hopper dredges that were working at 8.8-15.2 m depths during shipping channel maintenance or beach renourishment activities. Turtle weights ranged from 2.2 to 6.7 kg. All were found alive with blunt force injuries from passage through the dredge and were taken to rehabilitation facilities. Four green turtles died or were euthanized within 24 h

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Castro, Filipe. "Arade River Archaeological Complex: Dredges and Archaeology." International Journal of Nautical Archaeology 34, no. 1 (2005): 51–61. http://dx.doi.org/10.1111/j.1095-9270.2005.00043.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Kozhevnikov, N. N. "Improving the wear resistance of suction dredges." Hydrotechnical Construction 29, no. 3 (1995): 143–47. http://dx.doi.org/10.1007/bf01545806.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Cathcart, R. B. "Kra Canal (Thailand) excavation by nuclear-powered dredges." International Journal of Global Environmental Issues 8, no. 3 (2008): 248. http://dx.doi.org/10.1504/ijgenvi.2008.018639.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Ogorodnikov, S. P., I. I. Mikheev, A. E. Kulakov, and N. N. Kozhevnikov. "Intake devices for dredges with submersible suction pumps." Hydrotechnical Construction 24, no. 6 (1990): 372–74. http://dx.doi.org/10.1007/bf01433312.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Mikheev, I. I., V. I. Goryachev, and T. P. Kuznetsova. "Cutter Heads of Suction Dredges for Underwater Excavation." Power Technology and Engineering 51, no. 1 (2017): 58–60. http://dx.doi.org/10.1007/s10749-017-0783-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Ivanov, A. E. "Output of suction dredges with respect to solids." Hydrotechnical Construction 26, no. 10 (1992): 677–80. http://dx.doi.org/10.1007/bf01544772.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

BAETA, MARC, AROA NAVARRETE, and MANUEL BALLESTEROS. "First description of a new worm bait fishery in the NW Mediterranean Sea." Mediterranean Marine Science 20, no. 2 (2019): 302. http://dx.doi.org/10.12681/mms.19959.

Texto completo

Resumen

Most commercial clam stocks in the NW Mediterranean Sea have collapsed over the last few decades and, as a result, most clam dredge fishermen have been forced to leave the fishing sector. Recently, in order to sustain their economic activity, some fishermen have modified dredges to target sea worms to sell as bait for recreational fisheries. This study provides the first information about this new worm bait fishery on the Catalan Maresme coast (NE Spain). The local administration has regulated only a few aspects of the fishery: users (2 boats), geographical limits (40 km; between 0-7 m depth),

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Firdaus, Aden, Muhammad Rizkiansyah, and Yessi Nirwana. "Analisis Perbandingan Biaya pada Pekerjaan Pengerukan di Alur Pelabuhan Bandar Bakau Jaya Banten." Jurnal Rekayasa Hijau 4, no. 2 (2020): 62–71. http://dx.doi.org/10.26760/jrh.v4i2.15-23.

Texto completo

Resumen

ABSTRAKPelabuhan Bandar Bakau Jaya yang terletak di Provinsi Banten saat ini dapat melayani kapal yang berjenis 5.000 DWT, dan rencananya akan melayani kapal 10.000 DWT. Pekerjaan pengerukan akan dilakukan pada Alur Pelabuhan dengan dimensi panjang 2.391 m dengan jenis tanah adalah tanah halus berpasir. Tujuan dari penelitian ini adalah membandingkan biaya dan waktu pelaksanaan dari masing- masing jenis kapal keruk yang dapat melakukan pekerjaan pengerukan dengan kondisi tanah yang ada di alur pelabuhan. Metode yang digunakan adalah dengan memperhitungkan berapa lama waktu pekerjaan pengerukan

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Firdaus, Aden, Muhammad Rizkiansyah, and Yessi Nirwana. "Analisis Perbandingan Biaya pada Pekerjaan Pengerukan di Alur Pelabuhan Bandar Bakau Jaya Banten." Jurnal Rekayasa Hijau 4, no. 2 (2020): 62–71. http://dx.doi.org/10.26760/jrh.v4i2.62-71.

Texto completo

Resumen

ABSTRAKPelabuhan Bandar Bakau Jaya yang terletak di Provinsi Banten saat ini dapat melayani kapal yang berjenis 5.000 DWT, dan rencananya akan melayani kapal 10.000 DWT. Pekerjaan pengerukan akan dilakukan pada Alur Pelabuhan dengan dimensi panjang 2.391 m dengan jenis tanah adalah tanah halus berpasir. Tujuan dari penelitian ini adalah membandingkan biaya dan waktu pelaksanaan dari masing- masing jenis kapal keruk yang dapat melakukan pekerjaan pengerukan dengan kondisi tanah yang ada di alur pelabuhan. Metode yang digunakan adalah dengan memperhitungkan berapa lama waktu pekerjaan pengerukan

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Leitão, Francisco, Pedro Range, and Miguel Baptista Gaspar. "SURVIVAL ESTIMATES OF BYCATCH INDIVIDUALS DISCARDED FROM BIVALVE DREDGES." Brazilian Journal of Oceanography 62, no. 4 (2014): 257–63. http://dx.doi.org/10.1590/s1679-87592014067006204.

Texto completo

Resumen

The fate of released bycatch is an issue of great interest for fisheries research and management. Survival experiments were carried out to assess the survival capacity of animals damaged and discarded during clam dredging operations. Three common bycatch species, two fish (Trachinus vipera; Dicologlossa cuneata) and one crab (Polybius henslowii), were collected during the sorting of catches from a commercial dredging boat. An arbitrary score scale was used to quantify the type and extent of damage to the organisms. Onboard, damaged individuals were placed in tanks containing seawater which wer

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Gilkinson, Kent D., Donald C. Gordon, Kevin G. MacIsaac, et al. "Immediate impacts and recovery trajectories of macrofaunal communities following hydraulic clam dredging on Banquereau, eastern Canada." ICES Journal of Marine Science 62, no. 5 (2005): 925–47. http://dx.doi.org/10.1016/j.icesjms.2005.03.009.

Texto completo

Resumen

Abstract A hydraulic clam dredging experiment, designed to mimic offshore commercial dredging practices, was carried out at a depth of approximately 70 m on a sandy seabed on Banquereau, on the Scotian Shelf, eastern Canada. The experiment was designed to study the separate and combined effects of dredging through three treatment boxes (Dredging Only, Dredging and Discarding, Discarding Only) and two spatially separated reference boxes. In all, 270 taxa were identified from grab samples. Of these, four bivalves are targeted in the commercial fishery (Arctica islandica, Cyrtodaria siliqua, Mact

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Zhang, Yong, Chengjun Li, Guorui Qiao, Xuerong Sun, and Shumei Chen. "Vibration optimization methods of dredger engine room." Journal of Physics: Conference Series 2882, no. 1 (2024): 012059. http://dx.doi.org/10.1088/1742-6596/2882/1/012059.

Texto completo

Resumen

Abstract Due to the large number and heavy weight of equipment, as well as the high center of gravity in the cabin area of dredgers, the concentrated arrangement of equipment is prone to local vibration problems in the cabin area. Additionally, there are many devices that need to be placed under the deck in the cabin area, which imposes significant constraints on the placement of supports. Using the finite element method to analyze the vibration problem of a certain dredger, we studied the influence of different equipment arrangements and structural reinforcement methods on vibration. This all

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Anjos, Mariana, Fábio Pereira, Paulo Vasconcelos, et al. "Bycatch and discard survival rate in a small-scale bivalve dredge fishery along the Algarve coast (southern Portugal)." Scientia Marina 82, S1 (2018): 75. http://dx.doi.org/10.3989/scimar.04742.08a.

Texto completo

Resumen

Although the bivalve dredge used on the Algarve coast (southern Portugal) is highly selective for the target species, in some periods of the year the bycatch can exceed the catch of the commercial species. The present study aimed to quantify the bycatch and discards, estimate damage and mortality, and propose management measures to minimize discards and mortality. A total of 15 fishing surveys (60 tows) were performed using two types of dredges (“DDredge” targeting Donax trunculus and “SDredge” targeting Spisula solida and Chamelea gallina). Of the 85257 individuals (392.4 kg) of 52 taxa that

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Lucchetti, Alessandro, and Antonello Sala. "Impact and performance of Mediterranean fishing gear by side-scan sonar technology." Canadian Journal of Fisheries and Aquatic Sciences 69, no. 11 (2012): 1806–16. http://dx.doi.org/10.1139/f2012-107.

Texto completo

Resumen

An innovative approach with side-scan sonar was implemented to observe directly during towing operations the behaviour and the performance of hydraulic dredge, Rapido trawl, and two types of Mediterranean bottom trawls. The innovative aspect of the current paper is that a side-scan sonar was used alongside fishing operations when towing was in progress. Based on available literature, the type and level of the physical impact assessed were used to infer biological and ecological consequences caused by the fishing gear. The sonar used in real time can be applied to a wide range of research and m

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

MITUHASI, Takahisa, Toshihide KITAKADO, Fuxiang HU, and Tadashi TOKAI. "Modelling the contact probability and size-selectivity of toothed dredges." Fisheries Science 71, no. 4 (2005): 703–12. http://dx.doi.org/10.1111/j.1444-2906.2005.00996.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

O'Neill, F. G., M. Robertson, K. Summerbell, M. Breen, and L. A. Robinson. "The mobilisation of sediment and benthic infauna by scallop dredges." Marine Environmental Research 90 (September 2013): 104–12. http://dx.doi.org/10.1016/j.marenvres.2013.06.003.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Kozhevnikov, N. N., and M. S. Triandafilov. "Improving the delivery of suction-tube dredges and hydrotransport parameters." Hydrotechnical Construction 24, no. 11 (1990): 697–702. http://dx.doi.org/10.1007/bf01423889.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Ogorodnikov, S. P., I. I. Mikheev, and A. E. Kulakov. "Optimization of the mud intakes of dredges with submersible pumps." Hydrotechnical Construction 21, no. 7 (1987): 432–36. http://dx.doi.org/10.1007/bf01427276.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Freidin, V. M., T. I. Adam'yants, and N. N. Kozhevnikov. "Prospects of using grab dredges for excavating gravel-pebble deposits." Hydrotechnical Construction 22, no. 3 (1988): 155–57. http://dx.doi.org/10.1007/bf01441068.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Kozhevnikov, N. N., Ya Ya Urisman, and M. M. Fridman. "Development and implementation of domestic suction dredges with submersible pumps." Power Technology and Engineering 40, no. 6 (2006): 325–29. http://dx.doi.org/10.1007/s10749-006-0070-0.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Zhuang, Haifei, Mingming Liu, and Hairong Wang. "Design and Optimization of Slurry Conveying System for Small-sized Cutter Suction Dredger." Journal of Physics: Conference Series 2610, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1742-6596/2610/1/012002.

Texto completo

Resumen

Abstract Aiming at the production capacity of a newly-built small-sized dredger, the slurry conveying system is optimized. Based on the performance test of the model pump, the water performance curve of the dredge pump is obtained through similarity conversion; By comparing the resistance of the two pipe diameters, the diameters of the suction and discharge pipes on the dredger are optimized, and the resistance consumption of the slurry conveying pipeline on the dredger is reduced. The proportion of the resistance of the pipe on the dredger to the head of the dredge pump is reduced from 11.7%

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Bassias, Yannis, and Pierre Cros. "Dolomite and chert diagenesis in Upper Cretaceous pelagic sediments. Southern Kerguelen Plateau MD48: NASKA dredges." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 184, no. 3 (1992): 359–88. http://dx.doi.org/10.1127/njgpa/184/1992/359.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Urisman, Ya Ya. "Development of Flooded Sand and Gravel Pits by Use of Dredges." Power Technology and Engineering 38, no. 4 (2004): 208–11. http://dx.doi.org/10.1023/b:hyco.0000047259.08606.28.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Leotsinidis, Michalis, and Eleni Sazakli. "Evaluating contamination of dredges and disposal criteria in Greek coastal areas." Chemosphere 72, no. 5 (2008): 811–18. http://dx.doi.org/10.1016/j.chemosphere.2008.02.049.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Konter, Jasper G., Valerie A. Finlayson, Jacqueline Engel, Matthew G. Jackson, Anthony A. P. Koppers, and Shiv K. Sharma. "Shipboard Characterization of Tuvalu, Samoa, and Lau Dredge Samples Using Laser-Induced Breakdown Spectroscopy (LIBS)." Applied Spectroscopy 73, no. 6 (2019): 623–37. http://dx.doi.org/10.1177/0003702819830793.

Texto completo

Resumen

Chemical analysis using laser-induced breakdown spectroscopy (LIBS) is well suited for field applications and was applied here for shipboard characterization of a large sample set during the RR1310 rock dredging expedition to the Tuvalu Seamounts. Although recently the most common data treatment for LIBS has consisted of a partial least squares approach to define sample groupings, we show that quantitative data of useful quality can be obtained with a univariate approach. Here, our analysis goal was a quantitative comparison of the total alkali (Na2O + K2O) versus silica (SiO2) contents of 586

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Qi, Qiang, Feifei Qiao, Wenyuan Wang, Zijian Guo, and Ying Jiang. "A evaluation and selection model of dredger considering marine ecological environment and dredger performance." E3S Web of Conferences 294 (2021): 06001. http://dx.doi.org/10.1051/e3sconf/202129406001.

Texto completo

Resumen

There will be total suspended solids in port dredging, which will affect aquatic organisms and water quality. Therefore, with the Green Port becoming the core concept of port development, it is necessary to consider the impact of dredging on marine ecological environment when selecting dredgers. In this paper, the calculation method of biomass loss caused by dredging is proposed, and the biomass loss is taken as the evaluation index to establish a dredger selection model considering marine ecological environment and dredger performance. The dredger selection model uses the fuzzy synthetic eval

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!