scholarly journals POTENTIAL FISHING GROUND MAPPING BASED ON GIS HOTSPOT MODEL AND TIME SERIES ANALYSIS: A CASE STUDY ON LIFT NET FISHERIES IN SERIBU ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 337-356
Author(s):  
Andi Alamsyah Rivai ◽  
Vincentius P. Siregar ◽  
Syamsul B. Agus ◽  
Hiroki Yasuma
Keyword(s):  
Time Series ◽  
Fisheries Management ◽  
Fishing Ground ◽  
Effective Management ◽  
Target Species ◽  
Fishing Activity ◽  
Fishing Season ◽  
Spatio Temporal ◽  
West Monsoon

Information on the spatial and temporal of fishing activity can optimize a fisheries management and increase their economical and biological benefit. For effective management and good understanding of fishing activities, information about fishing ground is crucial. In this study, we aimed to analyze the spatio-temporal of lift net fisheries in Kepulauan Seribu by analyzing their fishing season, investigating their hotspot of fishing ground using GIS-based hotspot model, and mapping the potential fishing ground of each target species. We found that anchovy and scad could be caught throughtout the year, while sardine and squid had high fishing season in west monsoon. Hotspot of fishing ground of lift net fisheries in Kepulauan Seribu waters generally was concentrated around Lancang Island and in southern part of Kotok Island. Potential fishing ground for sardines was located in around Lancang Island on west monsoon. Squids were highly distributed around Lancang Island in December to January and around Lancang and Rambut Islands in November. Anchovy and scad had more potential fishing ground in around Kepulauan Seribu waters.  Keywords: fishing ground, lift net, hotspot, fishing season 

scholarly journals POTENTIAL FISHING GROUND MAPPING BASED ON GIS HOTSPOT MODEL AND TIME SERIES ANALYSIS: A CASE STUDY ON LIFT NET FISHERIES IN SERIBU ISLAND

2017 ◽  
Vol 9 (1) ◽  
pp. 337
Author(s):  
Andi Alamsyah Rivai ◽  
Vincentius P. Siregar ◽  
Syamsul B. Agus ◽  
Hiroki Yasuma
Keyword(s):  
Time Series ◽  
Fisheries Management ◽  
Fishing Ground ◽  
Effective Management ◽  
Target Species ◽  
Fishing Activity ◽  
Fishing Season ◽  
Spatio Temporal ◽  
West Monsoon

<p class="Paragraf"><em>Information on the spatial and temporal of fishing activity can optimize a fisheries management and increase their economical and biological benefit. For effective management and good understanding of fishing activities, information about fishing ground is crucial. In this study, we aimed to analyze the spatio-temporal of lift net fisheries in </em><em>Kepulauan Seribu</em><em> by analyzing their fishing season, investigating their hotspot of fishing ground using GIS-based hotspot model, and mapping the potential fishing ground of each target species. We found that anchovy and scad could be caught throughtout the year, while sardine and squid had high fishing season in west monsoon. Hotspot of fishing ground of lift net fisheries in </em><em>Kepulauan Seribu</em><em> waters generally was concentrated around Lancang Island and in southern part of Kotok Island. Potential fishing ground for sardines was located in around Lancang Island on west monsoon. Squids were highly distributed around Lancang Island in December to January and around Lancang and Rambut Islands in November. Anchovy and scad had more potential fishing ground in around </em><em>Kepulauan Seribu</em><em> waters. </em></p><p class="Paragraf"><em> </em></p><p class="Paragraf"><strong><em>Keywords</em></strong><em>: </em><em>fishing ground</em><em>, </em><em>lift net, hotspot, fishing season </em></p>

scholarly journals A Case Study in Connecting Fisheries Management Challenges With Models and Analysis to Support Ecosystem-Based Management in the California Current Ecosystem

2021 ◽  
Vol 8 ◽  
Author(s):  
Desiree Tommasi ◽  
Yvonne deReynier ◽  
Howard Townsend ◽  
Chris J. Harvey ◽  
William H. Satterthwaite ◽  
...  
Keyword(s):  
Fisheries Management ◽  
West Coast ◽  
California Current ◽  
Fishing Communities ◽  
Target Species ◽  
Ecosystem Models ◽  
Protected Species ◽  
Forage Species ◽  
The U.S

One of the significant challenges to using information and ideas generated through ecosystem models and analyses for ecosystem-based fisheries management is the disconnect between modeling and management needs. Here we present a case study from the U.S. West Coast, the stakeholder review of NOAA’s annual ecosystem status report for the California Current Ecosystem established by the Pacific Fisheries Management Council’s Fisheries Ecosystem Plan, showcasing a process to identify management priorities that require information from ecosystem models and analyses. We then assess potential ecosystem models and analyses that could help address the identified policy concerns. We screened stakeholder comments and found 17 comments highlighting the need for ecosystem-level synthesis. Policy needs for ecosystem science included: (1) assessment of how the environment affects productivity of target species to improve forecasts of biomass and reference points required for setting harvest limits, (2) assessment of shifts in the spatial distribution of target stocks and protected species to anticipate changes in availability and the potential for interactions between target and protected species, (3) identification of trophic interactions to better assess tradeoffs in the management of forage species between the diet needs of dependent predators, the resilience of fishing communities, and maintenance of the forage species themselves, and (4) synthesis of how the environment affects efficiency and profitability in fishing communities, either directly via extreme events (e.g., storms) or indirectly via climate-driven changes in target species availability. We conclude by exemplifying an existing management process established on the U.S. West Coast that could be used to enable the structured, iterative, and interactive communication between managers, stakeholders, and modelers that is key to refining existing ecosystem models and analyses for management use.

scholarly journals Fishing for euros: how mapping applications can assist in maintaining revenues under the Landing Obligation

2020 ◽  
Author(s):  
Julia Calderwood ◽  
Kristian Schreiber Plet-Hansen ◽  
Clara Ulrich ◽  
David G Reid
Keyword(s):  
Temporal Dynamics ◽  
Species Distributions ◽  
Fishing Effort ◽  
Fishing Industry ◽  
Fishing Activity ◽  
Spatio Temporal ◽  
Catch Rates ◽  
Demersal Species ◽  
High Catch

Abstract With the introduction of the Landing Obligation (LO) in EU fisheries, there is an increasing need for fishers to avoid unwanted catches while maximizing revenues. Improving understanding of the spatio-temporal dynamics of unwanted catches could assist the fishing industry optimize catches by altering where they fish. How following such advice relates to revenues and fishery dynamics requires more consideration. We take an existing hotspot mapping methodology and examine how it could be used to identify fishing opportunities under the LO in Irish (Celtic Sea) and Danish (North Sea and Skagerrak) demersal fisheries. We consider if fishing effort can be relocated to avoid unwanted catches while maintaining revenues. The value per unit effort of fishing activity in both areas was often linked to high catch rates of key demersal species (cod, haddock, hake, and whiting). Our analyses indicated, however, that there are options to fish in areas that could provide higher revenues while avoiding below minimum conservation reference size catches and choke species. This was evident across both case study areas demonstrating that hotspot mapping tools could have wide applicability. There does, however, remain a need to explore how the displacement of vessels may further alter species distributions and fleet economics.

scholarly journals Integrating fishing spatial patterns and strategies to improve high seas fisheries management

2018 ◽  
Author(s):  
Raul Vilela
Keyword(s):  
Fisheries Management ◽  
Current Knowledge ◽  
Future Research ◽  
Target Species ◽  
Fishing Activity ◽  
Southwest Atlantic ◽  
Fish Stocks ◽  
Heterogeneous Behavior ◽  
National Jurisdiction ◽  
High Seas

Fishing activity in waters beyond national jurisdiction generates multiple management issues, such as data poor fisheries, management of straddling fish stocks and lack of impact assessments on deep-sea Vulnerable Marine Ecosystems (VMEs). Fishing strategy is the key to understanding and managing high seas fisheries, targeting highly migratory resources that are widely distributed. An international fleet, including Spanish flag bottom trawlers, operates along the Patagonian shelf in Southwest Atlantic waters, which includes an unregulated strip of continental shelf beyond national jurisdiction. The Spanish fleet’s fishing strategy was analyzed, and based on on-board observer data collected from 1989 to 2015, three main fishing seasons were identified: a first season mainly targeting Argentinean squid (Illex argentinus) from January to March, a second season targeting hake (Merluccius hubbsi) from April to August, and a third season from September to December showing an opportunistic and heterogeneous behavior. Findings were framed within current knowledge on resource distribution. A preliminary observation of the inter-annual CPUE rates of target species during their respective fishing seasons highlights the possible existence of species linkages and bioclimatic cycles which may affect species distribution and abundance in the area and might require future research. Even if current fishing activity from the Spanish fleet does not overlap deep-water VMEs, any slight change in the fishing strategy to deeper waters (i.e. the fleet targeting high density I. argentinus areas below 300 m, or a change in the target species) would be critical for the conservation of VMEs in these waters.

DAMPAK PENGOPERASIAN ALAT PENANGKAP IKAN TERHADAP SUMBERDAYA IKAN RAWA DANAU BANGKAU THE (IMPACT OF FISHING GEARS TO SUSTAINABILITY OF FISHERIES AT DANAU BANGKAU SWAMP WATERS)

2016 ◽  
Vol 2 (4) ◽  
pp. 131
Author(s):  
Mijani Rahman
Keyword(s):  
Standard Length ◽  
Fish Population ◽  
Fishing Ground ◽  
Fish Production ◽  
Fishing Activity ◽  
Gonad Maturity ◽  
Fishing Season ◽  
Gill Net ◽  
Fishing Gears ◽  
The Impact

Secara kualitatif, produksi ikan dari Danau Bangkau dalam beberapa tahun terakhir mengalami penurunan, terutama ikan-ikan ekonomis penting. Ikan-ikan yang berukuran layak konsumsi mulai jarang ditemukan dan salah satu penyebabnya diduga karena intensitas penangkapan yang tinggi. Evaluasi dampak pengoperasian alat penangkap terhadap populasi  ikan merupakan langkah awal yang perlu dilakukan untuk menyusun srategi pemanfaatan sumberdaya ikan yang berkesinambungan. Hasil pengukuran terhadap panjang baku dan tingkat kematangan gonada ikan yang tertangkap menunjukan bahwa alat penangkap yang dioperasikan di rawa Danau Bangkau tergolong alat penangkap yang tidak selektif terhadap ukuran ikan yang tertangkap dan berpotensi memutus daur repopulasi ikan (kecuali horizontal gill net). Pembatasan daerah penangkapan, musim penangkapan dan pengaturan zona penangkapan merupakan solusi terbaik agar aktivitas penangkapan dapat memberikan manfaatyang optimal.Base on qualities category, a fish production from Danau Bankau swamp waters in some years later was reducing, especially in commercialize fish,  and one of causing this problem was a high fishing intensity. The evaluasion of fishing gears impact to fish population have been required to made a concept of sustainable fishing strategy. The measurement of standard length and gonad maturity of fish specimens showed all kind of fishing gears that operated in Danau Bangkau swamp waters included a selectiveness fishing geard category (excepted horizontal gill net) and could be broken to repopulation. A regulation of fishing ground, fishing season and fishing zone have a best solution in order to optimize of fishing activity.

Sign in / Sign up

Export Citation Format

Share Document