scholarly journals Pelatihan Penggunaan Fish Finder Untuk Peningkatan Produksi Perikanan Kelompok Nelayan Tuna Dumai

2020 ◽  
Vol 14 (4) ◽  
pp. 240
Author(s):  
Muhammad Nur Arkham ◽  
Fajar Miftakhul Rizqy ◽  
Roma Yuli Hutapea ◽  
Rizqi Ilmal Yaqin
Keyword(s):  
Fishing Ground

Penerapan ilmu dan teknologi dalam aktivitas perikanan tangkap berbasis sumberdaya akan mampu memenuhi kebutuhan nelayan secara berkelanjutan. Salah satu teknologi penangkapan yang dapat membantu nelayan dalam aktivitas penangkapan ikan adalah fish finder. Tujuan dari kegiatan pengabdian ini adalah untuk memberikan edukasi dan meningkatkan keterampilan kelompok nelayan melalui penggunaan fish finder dalam membantu mendeteksi keberadaan ikan yang nantinya mampu meningkatakan penangkapan ikan hasil tangkapan. Kegiatan pengabdian kepada masyarakat ini menggunakan metode pendekatan pengembangan masyarakat melalui pelatihan berdasarkan teori dan praktik serta diskusi kelompok secara terarah (FGD). Kegiatan pelatihan penggunaan fish finder berlangsung dengan baik, semangat dan partisipatif dari para peserta. Pelaksanaan pelatihan ini dilaksanakan dengan 2 konsep pendekatan yaitu kelas teori dan kelas praktik. Materi yang diberikan dalam kelas teori meliputi pengetahuan dan perkembangan penggunaan fish finder secara global, sedangkan untuk kelas praktik dilaksanakan pengoperasian fish finder langsung di atas kapal. Hasil dari monitoring dan evaluasi menyebutkan bahwa nelayan mendapatkan banyak manfaat dalam menggunakan alat bantu penangkapan fish finder dalam membantu mendeteksi keberadaan ikan sehingga mampu mengurangi biaya operasional, meningkatkan hasil tangkapan dan menemukan daerah tangkapan (fishing ground) lebih mudah. 

Application of Ocean Remote Sensing On Fishing Ground Analysis: A Review

2013 ◽  
Vol 19 (6) ◽  
pp. 1079-1088
Author(s):  
Kuiwei HU ◽  
Liuxiong XU ◽  
Xinjun CHEN ◽  
Guoping ZHU ◽  
Xuefang WANG
Keyword(s):  
Remote Sensing ◽  
Fishing Ground ◽  
Ocean Remote Sensing

scholarly journals Inferring the location and scale of mixing between habitat areas of lesser sandeel through information from the fishery

2010 ◽  
Vol 68 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Henrik Jensen ◽  
Anna Rindorf ◽  
Peter J. Wright ◽  
Henrik Mosegaard
Keyword(s):  
North Sea ◽  
Large Scale ◽  
Pelagic Fish ◽  
Fishing Ground ◽  
Marine Science ◽  
Foraging Habitat ◽  
Small Pelagic Fish ◽  
The North ◽  
The North Sea

Abstract Jensen, H., Rindorf, A., Wright, P. J., and Mosegaard, H. 2011. Inferring the location and scale of mixing between habitat areas of lesser sandeel through information from the fishery. – ICES Journal of Marine Science, 68: 43–51. Sandeels are small pelagic fish that play an important role in the diet of a range of natural predators. Because of their limited capture by traditional survey gear, little is known about their large-scale distribution or the degree of mixing between habitat areas. Detailed information collected directly from the fishery was used to map fishing grounds, which were then assumed to reflect the foraging habitat of the species. Length distributions from individual hauls were used to assess differences in the distributions as a function of distance between samples. Sandeel foraging habitat covered some 5% of the total area of the North Sea. Mixing between neighbouring fishing grounds was too low to eliminate differences in length distributions at distances between grounds down to 5 km. Within fishing grounds, mixing was sufficient to eliminate differences in length distributions at scales <28 km but insufficient at greater distances. The lack of mixing between grounds may result in large differences in sandeel abundance among adjacent fishing grounds. Further, notable abundance at one end of an extensive fishing ground is not necessarily indicative of similar abundance at its other end.

scholarly journals Analysis of background noise in a coastal fishing ground.

1990 ◽  
Vol 56 (6) ◽  
pp. 911-916 ◽  
Author(s):  
Shinji Fujita ◽  
Katsutaro Yamamoto ◽  
Katsuaki Nashimoto
Keyword(s):  
Background Noise ◽  
Fishing Ground

scholarly journals Investigation of seabed fishing impacts on benthic structure using multi-beam sonar, sidescan sonar, and video

2007 ◽  
Vol 64 (5) ◽  
pp. 1053-1065 ◽  
Author(s):  
Mashkoor A. Malik ◽  
Larry A. Mayer
Keyword(s):  
Gulf Of Maine ◽  
Fishing Ground ◽  
Sidescan Sonar ◽  
Data Sets ◽  
Frequency Filtering ◽  
Data Set ◽  
Detection And Identification ◽  
Spatial Frequency Filtering ◽  
Disparate Data ◽  
Fishing Impacts

Abstract Malik, M. A., and Mayer, L. A. 2007. Investigation of seabed fishing impacts on benthic structure using multi-beam sonar, sidescan sonar, and video. – ICES Journal of Marine Science, 64: 1053–1065. Long, linear furrows of lengths up to several kilometres were observed during a recent high-resolution, multi-beam bathymetry survey of Jeffreys Ledge, a prominent fishing ground in the Gulf of Maine located about 50 km from Portsmouth, NH, USA. These features, which have a relief of only a few centimetres, are presumed to be caused either directly by dredging gear used in the area for scallop and clam fisheries, or indirectly through the dragging of boulders by bottom gear. Extraction of these features with very small vertical expression from a noisy data set, including several instrumental artefacts, presented a number of challenges. To enhance the detection and identification of the features, data artefacts were identified and removed selectively using spatial frequency filtering. Verification of the presence of the features was carried out with repeated multi-beam bathymetry surveys and sidescan sonar surveys. Seabed marks that were clearly detected on multi-beam and sidescan sonar records were not discernible on a subsequent video survey. The inability to see the seabed marks with video may be related to their age. The fact that with time, the textural contrasts discernible by video imagery are lost has important ramifications for the appropriateness of methodologies for quantifying gear impact. The results imply that detailed investigations of seabed impact are best done with a suite of survey tools (multi-beam bathymetry, sidescan sonar, and video) and software to integrate the disparate data sets geographically.

Diet of Patagonian toothfish (Dissostichus eleginoides) around Macquarie Island, South Pacific Ocean

2002 ◽  
Vol 53 (1) ◽  
pp. 49 ◽  
Author(s):  
S. D. Goldsworthy ◽  
M. Lewis ◽  
R. Williams ◽  
X. He ◽  
J. W. Young ◽  
...  
Keyword(s):  
Low Frequency ◽  
Time Of Day ◽  
Fishing Ground ◽  
Fish Prey ◽  
Macquarie Island ◽  
South Pacific Ocean ◽  
Important Prey ◽  
Patagonian Toothfish ◽  
Myctophid Fish ◽  
Dissostichus Eleginoides

A total of 1423 stomach samples were taken from Patagonian toothfish, Dissostichus eleginoides, caught by bottom trawls at two fishing grounds near Macquarie I., over three fishing seasons. Fish were caught at depths ranging from 500 to 1290 m, and ranged in size from 310 to 1490 mm total length. The 462 stomach samples (32%) that contained prey items indicated that toothfish preyed on a broad range of species including fish, cephalopods and crustaceans (58%, 32% and 10% biomass, respectively), suggesting that they are opportunistic predators. The bathypelagic fish Bathylagus sp. was the most important fish prey (14% dietary biomass); however, nototheniid, macrourid, morid and myctophid fish were also taken. The squid Gonatus antarcticus was also an important prey species (16% biomass), and many other cephalopod species were taken in low frequency. Prawnlike crustaceans (Nematocarcinidae, Mysididae, Sergestidae and Euphausiidae) were the most important crustaceans taken (9% of prey biomass). Significant inter-seasonal and inter-fishing-ground differences in diet were found, but dietary composition was not related to fishing depth, fish size (with the exception of one fishing ground in one season) or the time of day of capture. Comparison with other studies reveals biogeographical differences in the diet of toothfish.

scholarly journals Spatial and temporal distribution of fishing resources exploited by the Manaus fishing fleet, Amazonas, Brazil

2007 ◽  
Vol 67 (4) ◽  
pp. 651-656 ◽  
Author(s):  
VS. Batista ◽  
M. Petrere Jr
Keyword(s):  
Amazon Basin ◽  
Temporal Distribution ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Rural And Urban ◽  
Environmental Variations ◽  
Fishing Resources ◽  
The Right ◽  
Urban People ◽  
Operational Aspects

Fishing resources are important generators of income and food for the rural and urban people in the Amazon. The present paper investigates fishing and environmental variables determining fishing production landed in Manaus and evaluates the relative abundance of commercial fishes in the different sub-systems of the Central Amazon basin. Information collected was used to test the new catch index derived from multiple regressions with the following significant variables: number of fisherman days fishing; distance of the fishing ground from Manaus; amount of ice carried during the trip; and river level. There were no significant differences between mean catch values of the Purus, Madeira and Juruá sub-systems. These results suggest that the tributaries of the right margin were very similar and were the most productive in commercial terms. The actual production varies according to the recent magnitude of fishing effort, environmental variations and operational aspects of fishing, particularly ice consumption.

scholarly journals A fishing ground benthic ecosystem improved during the economic crisis

2018 ◽  
Vol 76 (2) ◽  
pp. 402-409
Author(s):  
Irini Tsikopoulou ◽  
Chris J Smith ◽  
Nadia K Papadopoulou ◽  
Elena Eleftheriadou ◽  
Ioannis Karakassis
Keyword(s):  
Economic Crisis ◽  
Eastern Mediterranean ◽  
Ecological Status ◽  
Ecosystem Approach ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Ecological Studies ◽  
Ecological Quality Status ◽  
Traditional Fishing

AbstractFisheries have global socioeconomic and ecological effects. Long-term ecological studies could be beneficial to ecosystem approach management and biodiversity conservation, however, they are rare. In this study, the impacts of bottom trawling on a traditional fishing ground in the Eastern Mediterranean were addressed and an improvement in diversity metrics and ecological quality status were detected and ascribed to the Greek economic crisis. After 18 years, there was a modest increase in species richness, total abundance, and ecological status in the unaffected zone and more pronounced improvement in the trawled zone pointing at a possible link to a decrease in fishing effort. This upturn emphasized the strong link between financial activities and ecology. The present study underlines the multiple and variable effects of economy not only on countries and citizens but also on the environment and ecosystem conservation and management.

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