scholarly journals BIO-EXPLOITATION STATUS OF BOMBAY DUCK (Harpadon nehereus HAMILTON, 1822) ON TRAWL FISHERY IN TARAKAN WATERS

2015 ◽  
Vol 21 (1) ◽  
pp. 53
Author(s):  
Duto Nugroho ◽  
Ria Faizah ◽  
Andhika P. Prasetyo ◽  
M. Badrudin
Keyword(s):  
Fishery Management ◽  
Management Plan ◽  
Reference Points ◽  
Fishing Ground ◽  
Individual Species ◽  
Small Scale ◽  
Base Line ◽  
Boundary Area ◽  
Bombay Duck ◽  
Harpadon Nehereus

North Kalimantan Province, notably Tarakan City marine waters, is one of the important fishing ground in boundary area among Sulu Sulawesi Marine Ecoregion. It produces approximately 100 mt/annum of Bombay duck (<em>Harpadon nehereus</em>) with valued of US$ 750,000. The sustainability of this fishery is a crucially concern given the following: substantial economic contribution, significant dependence of small-scale fishers on this species for their livelihoods. The fishing intensities considerable and growing threats to their habitats. To evaluate the vulnerability of individual species to over exploitation, the spawning potential ratio (SPR) approach applied to describe the status of its existing fisheries. This approach provides the ability to determine fishing mortality as reference points to enhance its sustainability. The objective of this study is to understand this fish biomass resilience to harvesting. The calculated SPR based on the value of estimated length of first capture or Lc at 208 mm is equivalent to the SPR of 28%. With a base line of stocks are generally thought to risk recruitment declining when SPR &lt;20%, recent finding indicated that the existing fishery can be generally described as nearly fully exploited. In recognition of this sector’s has an ecological importance and socio-economic significance, the sustainable development of Bombay duck fisheries should be initiated through developing local fishery committee to provide a their local fishery management plan.

scholarly journals The monkfish fishery and its management in the northeastern USA

2008 ◽  
Vol 65 (7) ◽  
pp. 1370-1379 ◽  
Author(s):  
Phil Haring ◽  
J-J. Maguire
Keyword(s):  
Fishery Management ◽  
Management Plan ◽  
Maximum Sustainable Yield ◽  
Reference Points ◽  
Sustainable Yield ◽  
Marine Science ◽  
The Us ◽  
Management Plans ◽  
Northeastern Usa ◽  
Innovative Approaches

Abstract Haring, P., and Maguire, J-J. 2008. The monkfish fishery and its management in the northeastern USA. – ICES Journal of Marine Science, 65: 1370–1379. The domestic monkfish (Lophius americanus) fishery off the northeastern USA is described, along with the management response to the expansion of the fishery and the challenges posed to the management and scientific processes. The US fishery was virtually non-existent in the early 1980s, but it expanded rapidly over the next decade to the point that a management plan became necessary to regulate harvesting. By law, US fishery management plans must include measurable biological reference points based on maximum sustainable yield or a proxy; management plans must stop overfishing and rebuild overfished stocks. For monkfish, the limited biological and historical fisheries information presented significant challenges to science and management and resulted in the adoption of innovative approaches to comply with the law.

scholarly journals Histology of Tritia mutabilis gonads: using reproductive biology to support sustainable fishery management

2021 ◽  
Vol 34 ◽  
pp. 6
Author(s):  
Alicia Mallet ◽  
Jean-Yves Jouvenel ◽  
Morgane Broyon ◽  
Nelly Pirot ◽  
Benjamin Geffroy
Keyword(s):  
Reproductive Biology ◽  
Fishery Management ◽  
Shell Height ◽  
Management Plan ◽  
Small Scale ◽  
Breeding Period ◽  
Management Measures ◽  
Baseline Information ◽  
Sustainable Fishery ◽  
First Maturity

The mutable nassa, Tritia mutabilis, a marine gastropod that is widely exploited on the Adriatic coast is an important source of income for small-scale fishermen in the Mediterranean Sea, particularly in the Gulf of Lion. However, the lack of knowledge on the ecology and biology of this species limits our capacities to propose and produce an effective management plan. As a result, stocks are currently declining, especially in Italy. In order to optimize a management plan for this fishery, we designed a study to better characterize the reproductive biology of T. mutabilis, using gonad histology and performing a regular monitoring of population size frequency. The average shell height of individuals during the breeding period was 24 ± 2.7 mm for males and 30 ± 3.7 mm for females. The presence of small females (10 mm) and large males (32 mm) in the whole sample challenged previous assumptions regarding protandry (sex change from male to female). The size at first maturity was estimated for males and females at 17.5 mm and 24.4 mm shell height, respectively. In Italy, current management measures include a minimum conservation reference size of 20 mm in shell height. Therefore, it is likely that many individuals that did not reproduce are being caught, which could partly explain the decline observed, despite conservation measures introduced more than ten years ago. Overall, our study provides some baseline information to establish, in consultation with fishermen, management measures for this small-scale fishery in France.

scholarly journals KAJIAN PENANGGULANGAN IUUF PADA PERIKANAN CANTRANG DI LAUT JAWA (WPP – 712)

2014 ◽  
Vol 6 (2) ◽  
pp. 55
Author(s):  
Duto Nugroho ◽  
Suherman Banon Atmaja
Keyword(s):  
Fishery Management ◽  
Demersal Fish ◽  
Reference Points ◽  
Fish Stock ◽  
Small Scale ◽  
Fish Resources ◽  
Iuu Fishing ◽  
Data Collecting ◽  
Java Sea ◽  
Collecting System

<p>Kajian terhadap perikanan cantrang yang beroperasi di Laut Jawa dengan menggunakan perangkat pengelolaan cenderung dikategorikan sebagai perikanan akses terbuka. Penambahan armada secara historis memperlihatkan rendahnya pertimbangan terhadap pentingnya kelestarian sumber daya ikan, bebas beroperasi dan dalam banyak kasus tidak dikelola sesuai tatalaksana perikanan secara bertanggung jawab. Hasil penelitian menunjukkan sebagian besar armada cantrang dengan izin daerah melakukan penangkapan di luar batas 12 mil laut dan beroperasi di kawasan yang berdasarkan ketentuan diperuntukan bagi nelayan skala kecil yang bukan merupakan wewenang pemberi ijin armada cantrang dari panyai Utara Jawa. Studi kasus dilakukan di Pelabuhan Perikanan Tegal, ditujukan untuk menggambarkan sistem pendataan aktivitas penangkapan yang sedang berjalan. Hal ini berkaitan dengan sistem pencatatan data dan informasi perikanan setempat memiliki kemampuan dan kapasitas terbatas terutama pada sistem pemantauan, pengendalian dan pengawasan untuk melaksanakan pengelolaan perikanan berdasarkan prinsip tata laksana pemanfaatan secara berkelanjutan sesuai peraturan dan keputusan teknis. Terbatasnya pemahaman tentang dampak praktek perikanan tidak berkelanjutan, baik pada tingkat pelaku dan pembuat kebijakan merupakan permasalahan yang harus segera dipecahkan. Kajian ini menyimpulkan bahwa sistem yang berjalan hanya mampu merekam data kurang dari sepertiganya dan penerapan perikanan secara bertanggung jawab pada perikanan cantrang memberikan indikasi pada tingkat yang mengkhawatirkan terutama berdasarkan pertimbangan biologi, eksploitasi dan kelestarian lingkungan, serta memiliki potensi terjadinya unreported yang mengarah pada praktek IUU fishing. Temuan ini diharapkan dapat memperkuat tersedianya landasan pengelolaan perikanan terkait pemulihan sumberdaya ikan demersal bagi kepentingan pengembangan perikanan dalam jangka panjang di Laut Jawa.</p><p> </p><p>Study on demersal danish seine fishery operating in the Java Sea tend to be categorized as an open access fishery. The historical fleet development indicate no limited access to exploit demersal fish resources, which is in many cases the fishery are not well managed in a responsible manner. Study indicates that most of license to fish of demersal danish seine operate in areas outside 12 nm, somehow fleets operated in the area for small-scale fishers in the nearby coastal area beyond the origin of license authority. The objective is to describe the existing data collecting system. This corresponds to the limitation of capacity of the catch in one of fishing port. The data collecting system of local fisheries services has a limited capacity, particularly in monitoring, control and surveillance to implement best practices of fisheries management that declared through several technical reference points. Increasing awareness by complying with management measures of business sectors and policy makers must be immediately resolved. This study indicates current system covered less than a third of its landing data and it would affect the implementation of responsible fisheries based on bio-exploitation and environmental sustainability indicators on demersal fishery. It also has a potential on unreported that lead to IUU fishing practices. This should considered that bias of data could affect the accuracy of regular fish stock assessment. This finding should be treated to strengthen the long-term demersal danish seine fishery management plan as a baseline of sustainable demersal fish resources in the Java Sea.</p>

The art of ecosystem-based fishery management

2014 ◽  
Vol 71 (3) ◽  
pp. 479-490 ◽  
Author(s):  
Michael J. Fogarty
Keyword(s):  
Fishery Management ◽  
Decision Rules ◽  
Maximum Sustainable Yield ◽  
Reference Points ◽  
Individual Species ◽  
Emergent Properties ◽  
Nontarget Organisms ◽  
Modeling And Analysis ◽  
Adoption And Implementation ◽  
Management Procedures

The perception that ecosystem-based fishery management is too complex and poorly defined remains a primary impediment to its broadscale adoption and implementation. Here, I attempt to offer potential solutions to these concerns. Specifically, I focus on pathways that can contribute to overall simplification by moving toward integrated place-based management plans and away from large numbers of species-based plans; by using multispecies or ecosystem models and indicators that permit the simultaneous and consistent assessment of ecosystem components while also incorporating broader environmental factors; and by consolidating individual administrative and regulatory functions now mostly dealt with on a species-by-species basis into a more integrated framework for system-wide decision-making. The approach focuses on emergent properties at the community and ecosystem levels and seeks to identify simpler modeling and analysis tools for evaluation. Adoption of ecosystem-based management procedures relying on simple decision rules and metrics is advocated. It is recommended that we replace static concepts for individual species focusing on maximum sustainable yield with a dynamic ecosystem yield framework that involves setting system-wide reference points along with constraints to protect individual species, habitats, and nontarget organisms in a dynamic environmental setting.

scholarly journals Global Ecolabelling Certification Standards and ASEAN Fisheries: Can Fisheries Legislations in ASEAN Countries Support the Fisheries Certification?

2018 ◽  
Vol 10 (11) ◽  
pp. 3843 ◽  
Author(s):  
Sopha Lieng ◽  
Nobuyuki Yagi ◽  
Hiroe Ishihara
Keyword(s):  
Fishery Management ◽  
Code Of Conduct ◽  
Reference Points ◽  
Small Scale ◽  
Fisheries Resources ◽  
Asean Member ◽  
Food And Agriculture ◽  
Certification Standards ◽  
Asean Countries ◽  
Legal Frameworks

Fisheries, particularly small-scale fisheries, in the Association of Southeast Asian Nations (ASEAN) countries are an important source of food security, nutrition, and livelihood for people. However, high fishing pressure and other impacts have resulted in a decline of fisheries resources, questioning the future sustainability of fisheries. Ecolabelling is a tool developed based on the Code of Conduct for Responsible Fisheries and the Food and Agriculture Organization (FAO) Guideline for Ecolabelling of Fish and Fisheries Products from Marine/Inland Fisheries. In the past decades, only a few fisheries in ASEAN countries have been certified. This study particularly focuses on the legal frameworks of these countries and reviews the existing national fisheries legislation, including laws, acts, decrees, directives, rules, and regulations in ASEAN countries in relation to the requirement of the fisheries certification standards. The review reveals that although the legal frameworks in ASEAN member states generally provide a fair basis for their fisheries to meet the requirement of the fisheries certification standards, further improvements are required to incorporate the concept of adaptive management, precautionary approaches, and reference points on fishery management objectives. Monitoring, control, and surveillance of fisheries and other enforcement activities for fisheries legislations are other challenges to ensure sustainability of fisheries through fisheries certification.

scholarly journals KONSEPTUALISASI PENGELOLAAN PERIKANAN LAUT SKALA KECIL BERBASIS LOKASI PKN (Peningkatan Kehidupan Nelayan) (Study Kasus: Wilayah Kecamatan PKN Kabupaten Nagan Raya)

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Farah Diana ◽  
Muhammad Rizal
Keyword(s):  
Fishery Management ◽  
Secondary Data ◽  
Structured Interview ◽  
Primary Data ◽  
Fishing Ground ◽  
Small Scale ◽  
Structured Interviews ◽  
Dominant Type ◽  
Small Scale Fisheries ◽  
Fisheries Resources

Capture fisheries are very important economic activity and have contributed greatly to the total fishery production in general in the District Naganraya. Fishery system that occurs dominated by small-scale fisheries. Fishermen in Naganraya district has a high dependence on fisheries resources as the main source of livelihood and almost all coastal areas based fisheries activities. Small-scale fisheries businesses have an impact on the fishing fleet and fishing locations (fishing ground) resulting in range of fishing operations is limited. The purpose of this research is 1). Analyzing small-scale capture fisheries system in locations PKN Naganraya district, 2). Formulate an alternative strategy in the management of small-scale fishing locations PKN Naganraya district. Data to be collected in this study consisted of primary and secondary data. Primary data was collected intensively using semi-structured interviews (semi-structured interview) to small-scale fishermen, observation and documentation in selected locations. The results showed that the dominant type of fishing gear is trawl catches beach and species that dominate the catch is Sardinella lemuru and Selar spp. Fish marketing patterns in locations peningkapan fishing activities (PKN) is not through the auction only through traders / large and are twelve strategic through internal and external environmental factors were dominant influence on the pattern of the conceptualization of small-scale fishery management in PKN location Nagan Raya.

Fishing catch shares in the face of global change: a framework for integrating cumulative impacts and single species management

2010 ◽  
Vol 67 (12) ◽  
pp. 1968-1982 ◽  
Author(s):  
Isaac C. Kaplan ◽  
Phillip S. Levin ◽  
Merrick Burden ◽  
Elizabeth A. Fulton
Keyword(s):  
Global Change ◽  
Ocean Acidification ◽  
Fishery Management ◽  
Single Species ◽  
Ecosystem Model ◽  
Careful Consideration ◽  
Reference Points ◽  
Cumulative Impacts ◽  
English Sole ◽  
Modeling Tools

Any fishery management scheme, such as individual fishing quotas (IFQs) or marine protected areas, should be designed to be robust to potential shifts in the biophysical system. Here we couple possible catch scenarios under an IFQ scheme with ocean acidification impacts on shelled benthos and plankton, using an Atlantis ecosystem model for the US West Coast. IFQ harvest scenarios alone, in most cases, did not have strong impacts on the food web, beyond the direct effects on harvested species. However, when we added the impacts of ocean acidification, the abundance of commercially important groundfish such as English sole ( Pleuronectes vetulus ), arrowtooth flounder ( Atheresthes stomias ), and yellowtail rockfish ( Sebastes flavidus ) declined up to 20%–80%, owing to the loss of shelled prey items from their diet. English sole exhibited a 10-fold decline in potential catch and economic yield when confronted with strong acidification impacts on shelled benthos. Therefore, it seems prudent to complement IFQs with careful consideration of potential global change effects such as acidification. Our analysis provides an example of how new ecosystem modeling tools that evaluate cumulative impacts can be integrated with established management reference points and decision mechanisms.

AZOV SEA VIMBA INDICATOR ASSESSMENT OF THE STATE OF FISH POPULATION IN TERMS OF LACK OF BIOLOGICAL DATA BY LBI MODEL

Fisheries ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. 68-75
Author(s):  
Inna Kozobrod ◽  
M. Pyatinsky ◽  
Elena Vlasenko
Keyword(s):  
Stock Assessment ◽  
Fish Population ◽  
Maximum Sustainable Yield ◽  
Biological Data ◽  
Reference Points ◽  
Population Characteristics ◽  
Small Scale ◽  
Assessment Procedure ◽  
Indicator Method ◽  
Yield Level

Stock assessment of vimba population Vimba vimba (Linnaeus, 1758) in period 2015–2020 was performed by qualitative indicator method LBI (Length-Based Indicators) that allows to assess qualitative characteristics of the population and fisheries and MSY biological reference points. The indicator, qualitative approach to stock assessment was applied due to absence vimba population of stable stock-recruitment relationship (due to artificial reproduction exist), which makes impossible to apply surplus production approach to solve production equation dB/dt. LBI model was performed based on available length-weight vimba frequencies dynamics information, which allows to evaluate qualitative population characteristics and fisheries impact. Model results shows no overexploitation signals: in period 2015–2020 fisheries are carried out in maximum sustainable yield level. Indicator results according to reference points indicate no significant signals of reduction optimal length class (Lopt), small-size or large-size class. In 2016 and 2018 uncertain overexploitation of small-scale classes leads to no significant changes was underlined. In terms of biological and fisheries data lacking, LBI methods allow to perform stock assessment procedure more stable and robust then surplus or cohort approach, and output scientific advice to fisheries management.

Efficiency and selectivity of the Anomalocardia brasiliana (Mollusca: Veneridae) hand dredge used in southern Brazil

2010 ◽  
Vol 90 (7) ◽  
pp. 1455-1464 ◽  
Author(s):  
Paulo R. Pezzuto ◽  
Caroline Schio ◽  
Tito C.M. Almeida
Keyword(s):  
Management Plan ◽  
Fishing Effort ◽  
Management Tool ◽  
Small Scale ◽  
Commercial Fisheries ◽  
Effective Management ◽  
Southern Brazil ◽  
Fishing Rights ◽  
Before And After ◽  
Experimental Plots

In Florianópolis, southern Brazil, the venerid clam Anomalocardia brasiliana has supported subsistence and small-scale commercial fisheries for decades. The introduction of a hand dredge (gancho) since 1987 led to the development of a significant fishery supplying both local and regional shellfish markets. In 1992 one of the main fishing areas in the region was designated as the first Brazilian Marine Extractive Reserve (Pirajubaé RESEX), a federal form of governance intended to promote sustainable exploitation of natural resources by assigning exclusive fishing rights to traditional users. However, excessive fishing effort, institutional shortcomings and lack of a negotiated management plan have resulted in the overexploitation of the species since 2000. This study was aimed at evaluating the efficiency and selectivity of the hand dredge currently in use at the RESEX, through a field experiment conducted in October 2006. Quantitative samples of A. brasiliana were collected before and after dredging 15 experimental plots. Additional samples were obtained inside the dredge (catch) and respective cover cod-end (discard) for selectivity analysis. A single haul of the hand dredge can dislocate up to 76% of the individuals present in the sediment irrespective of their size, and retain up to 69% of the commercial-sized organisms. The gear has a knife-edge selection pattern, which enables the use of the minimum spacing between the iron bars of the dredge's basket as an effective management tool.

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