Correction to: Highly migratory species predictive spatial modeling (PRiSM): an analytical framework for assessing the performance of spatial fisheries management

Fixed closure (FC) is a standard fisheries management tool for protecting sensitive species or species requiring conservation. However, an FC might not effectively manage migratory species because of the large uncertainties of their migration. Adaptive real-time closure (ARTC) is a tool that updates closure areas according to the latest information. This study aimed to evaluate the effectiveness of ARTC to conserve sensitive species for data-limited fisheries by a series of simulations using migration models with hotspots. In the single species simulation, the conservation ratio for the sensitive species in FC varies widely at greater migration uncertainty. In ARTC, a longer duration of a hotspot resulted in a higher conservation ratio. When the mean duration of hotspots was medium or long, the conservation ratio for the sensitive species was more than 50 % in more than 99 % of the simulation trials. In multispecies fisheries, a clear trade-off was observed between the conservation ratio of sensitive species and other species. ARTC was more effective than whole closure when the proportion of sensitive species was high or without closure when the proportion was low. Conditions in which ARTC was most appropriate were described for hotspot duration, increased numbers of individuals in a hotspot, and the relative value of conservation, representing the ratio of the value of conserving sensitive species to one of catching other species.

Download Full-text

Keragaman Genetik Ikan Cakalang (Katsuwonus pelamis) di Perairan Laut Maluku Utara

DEPIK ◽

10.13170/depik.7.2.11156 ◽

2018 ◽

Vol 7 (2) ◽

pp. 164-176

Author(s):

Nebuchad Nezzar Akbar ◽

Rusmawati Labenua

Keyword(s):

Genetic Diversity ◽

Fisheries Management ◽

Negative Impact ◽

Genetic Data ◽

Molecular Characteristics ◽

Skipjack Tuna ◽

Migratory Species ◽

Sustainable Fisheries ◽

Katsuwonus Pelamis ◽

The North

Skipjack tuna is a migratory species that migrate globally throughout the ocean. The North Maluku Sea has a big potency on skipjack, this resource has been exploited intensively and gave the negative impact on skipjack population. The genetic data is one of the important information to strategy a better sustainable fisheries management. Hence, the aims of the study were to analyze the genetic diversity data in North Maluku Sea. The samples were collected from three locations, namely Morotai Island, South Halamera and Bacan. A total of 10 samples were collected from every location. The samples were extracted with Chelex 10%, and processing for PCR and sequencing. The results showed that molecular characteristics in skipjack are 546 (bp). The genetic diversity was ranged from 0.800-1.000 with the total of 28 haplotypes of 30 samples. The genetic diversity is included in high/undisturbed criteria and showed the population still in stable condition.Ikan Cakalang merupakan migratori spesies yang bermigrasi secara global di seluruh samudera. Potensi ikan cakalang sangat tinggi di perairan laut Maluku Utara. Pemanfaatan sumberdaya ikan cakalang sudah dilakukan lama dan terus menurus sehingga berdampak pada penurunan, oleh karena itu perlu segera dilakukan pengelolaan secara berkelanjutan. Data genetik merupakan salah satu informasi penting untuk menyusun rencana pengelolaannya di perairan laut Maluku Utara. Oleh karena itu penelitian ini bertujuan untuk melakukan analisis keragamana genetik ikan cakalang di perairan Maluku Utara. Sampel ikan diperoleh dari tiga lokasi, yaitu Pulau Moratai, Halamera Selatan dan Bacan, masing-masing lokasi dengan 10 sampel. Hasil penelitian diperoleh karakteristik molekuler pada ikan cakalang 546 (bp). Keragaman genetik ditemukan berkisar 0.800-1.000 dengan jumlah 28 jaringan haplotipe dari 30 sampel. Nilai keragaman genetik masuk dalam kriteria tinggi/baik, sehingga bisa dikatakan bahwa populasi ikan masih dalam kondisi stabil.

Download Full-text

ANALISIS HUKUM TERHADAP PENGATURAN PENGELOLAAN PERIKANAN BERBASIS MASYARAKAT DI INDONESIA

Jurnal Hukum Lingkungan Indonesia ◽

10.38011/jhli.v2i1.18 ◽

2015 ◽

Vol 2 (1) ◽

pp. 1

Author(s):

Ahmad Marthin Hadiwinata

Keyword(s):

Fisheries Management ◽

Common Property ◽

Analytical Framework ◽

Legal Framework ◽

Legal Issues ◽

Small Island ◽

Marine Resources ◽

Community Based ◽

The Common ◽

Fisheries Act

AbstrakArtikel ini bertujuan untuk menganalisis ketentuan hukum nasional dalam pengelolaan perikanan berbasis masyarakat (PPBM). Penulis menggunakan kerangka analisis Kuemlangan dan Teigene dalam artikelnya yang berjudul: “An Overview Of Legal Issues And Broad Legislative Considerations For Community Based Fisheries Management.” Tidak ada cetak biru dalam menciptakan kerangka hukum bagi PPBM namun hukum akan menentukan pengaturan mengenai PPBM. Perlu untuk melakukan penilaian terhadap penerimaan konstitusi atas PPBM dengan contoh hak kepemilikan bersama serta bagaimana desentralisasi kewenangan pengelolaan diatur. Penulis menemukan kemungkinan adanya konflik berdasarkan UU Perikanan, UU PWP3K dan UU Pemda dalam pengelolaan sumber daya perairan dan laut. Desa sebagai peluang penciptaan PPBM dapat menerapkan empat prinsip yaitu jaminan, ekslusivitas, keberlangsungan serta fleksibilitas. Tetapi terdapat hambatan dengan tidak terintegrasinya PPBM dalam kerangka hukum perikanan yang lebih luas. Penulis menyarankan adanya perubahan kebijakan menyeluruh dalam hukum perikanan yang mengakui pengelolaan oleh masyarakat dalam perikanan. AbstractThis article aims to analyze the provisions of national law in a community-based fisheries management (CBFM). The author uses analytical framework Kuemlangan and Teigenen in an article entitled: “An Overview Of Legal Issues And Broad Legislative Considerations For Community Based Fisheries Management.” There is no blueprint in creating a legal framework but the law will define the arrangements regarding CBFM. There is a need to conduct an assessment of the constitutionality of CBFM, for example related to the common property rights and decentralization of management authority. The author discovered a possible conflict based on Fisheries Act, Coastal and Small Island Act and Local Government Act in the management of marine resources. Villages as opportunities for establishing CBFM can apply four principles such as: security, exclusivity, permanence and flexibility. However, there are constraints in the integration of CBFM in the wider legal framework of fisheries. The author suggests a comprehensive legal reform in the fishery law to recognize community management with regard to fisheries.

Download Full-text

Pacific Salmon Environmental and Life History Models: Advancing Science for Sustainable Salmon in the Future

Pacific Salmon Environmental and Life History Models: Advancing Science for Sustainable Salmon in the Future ◽

10.47886/9781934874097.ch11 ◽

2009 ◽

Keyword(s):

Life History ◽

Fisheries Management ◽

Life Histories ◽

Pacific Salmon ◽

Fish Habitat ◽

Puget Sound ◽

Analytical Framework ◽

The United States ◽

Management Plans ◽

Fisheries Act

<em>Abstract.</em>—The 1996 Sustainable Fisheries Act states that all federal fisheries management plans should contain a description of essential fish habitat (EFH). While much emphasis has been placed on estimating EFH for marine stocks, very little attention has been paid to doing so for Pacific salmon <em>Oncorhynchus </em>spp., in part due to their complex life histories. An earlier assessment of EFH for Pacific salmon across the west coast of the United States focused on the freshwater component of EFH due to limited knowledge about marine distributions. That analysis concluded that a more in-depth and smaller-scale examination was needed to assess how freshwater habitat affects the various life stages. Here we use a detailed life history model for Pacific salmon to estimate the freshwater component of EFH for two threatened populations of Chinook salmon within a large watershed draining into Puget Sound, Washington, USA. By accounting for proposed harvest rates, hatchery practices, and habitat structure, we identified 23 of 50 subbasins as EFH for ensuring no significant decrease in the total number of spawners relative to current average escapement. Our analytical framework could be easily applied to other populations or species of salmon to aid in developing recovery and management plans.

Download Full-text

Livelihood functions of inland fisheries: policy implications in developing countries

Water Policy ◽

10.2166/wp.2005.0023 ◽

2005 ◽

Vol 7 (4) ◽

pp. 359-383 ◽

Cited By ~ 90

Author(s):

Laurence E. D. Smith ◽

S. Nguyen Khoa ◽

K. Lorenzen

Keyword(s):

Developing Countries ◽

Fisheries Management ◽

Development Policy ◽

Rural Livelihoods ◽

Analytical Framework ◽

Policy Implications ◽

Poor People ◽

Inland Fisheries ◽

Fisheries Policy ◽

Traditional Approaches

An improved analytical framework and typology of fishers are provided to improve understanding of the diverse livelihood functions of inland fishing in development policy making. Inland fisheries make an important but often neglected contribution to rural livelihoods in developing countries. A holistic and widely applicable analysis of the possible livelihood functions of such fisheries is presented, focusing on fishing as one activity within diverse livelihoods. Four different livelihood strategies are identified, involving fishing as: (i) a primary livelihood of last resort, (ii) part of a diversified semi-subsistence livelihood, (iii) a specialist occupation and (iv) part of a diversified accumulation strategy. The policy implications of these strategies are found to be differentiated and poorly represented in practice by socio-economic analysis that either undfervalues fisheries or treats them solely as livelihoods of last resort and by traditional approaches to fisheries management centred on stock conservation. The need for a more diverse and flexible range of measures, tailored to local priorities and conditions and ensuring that poor people can access the benefits of inland fisheries whilst achieving conservation objectives, is identified.

Download Full-text

Genetic Diversity and Demography of Skipjack Tuna (Katsuwonus pelamis) In Southern and Western Part of Indonesian Waters

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.24.2.61-68 ◽

2019 ◽

Vol 24 (2) ◽

pp. 61

Author(s):

Irwan Jatmiko ◽

Raymon Rahmanov Zedta ◽

Maya Agustina ◽

Bram Setyadji

Keyword(s):

Genetic Diversity ◽

Fisheries Management ◽

Pcr Amplification ◽

Skipjack Tuna ◽

Migratory Species ◽

Katsuwonus Pelamis ◽

Tissue Samples ◽

Management Area ◽

Polymerase Chain ◽

Group 2

Skipjack tuna (Katsuwonus pelamis) is highly migratory species that spread from trophic and sub trophic waters. This species can be found in Atlantic, Indian and Pacific oceans. The genetic information of highly migratory species like skipjack tuna is important to support the sustainability of the fisheries. The objectives of this study are to gain information genetic diversity and population structure of exploited species and to understand the population kinship in Indonesian waters. Tissue samples were collected from six locations, i.e.: Sibolga (North Sumatera), Padang (West Sumatera), Binuangeun (Banten), Pacitan (East Java), Lombok (West Nusa Tenggara) and Kupang (East Nusa Tenggara). Microsatellite analysis was done in this study consisting of extraction, purification, polymerase chain reaction (PCR) amplification and electrophoresis. Three loci used for the analysis i.e.: UTD 172, UTD 523 and UTD 535. The results showed that there are two groups from six locations i.e.: group 1: Sibolga and Padang; group 2: Binuangeun, Pacitan Lombok and Kupang. The variance among these two groups is 0.066 with variance 5.441%. This finding in line with Indonesian Fisheries Management Area of 572 (west of Sumatera waters) and 573 (south of Java waters). However, as highly migratory species across nations, the management strategy for skipjack tuna needs collaboration among countries through regional fisheries management authority like Indian Ocean Tuna Commission (IOTC).

Download Full-text

Highly migratory species predictive spatial modeling (PRiSM): an analytical framework for assessing the performance of spatial fisheries management

Marine Biology ◽

10.1007/s00227-021-03951-7 ◽

2021 ◽

Vol 168 (10) ◽

Author(s):

Daniel P. Crear ◽

Tobey H. Curtis ◽

Stephen J. Durkee ◽

John K. Carlson

Keyword(s):

Spatial Modeling ◽

Performance Metrics ◽

Additive Model ◽

The United States ◽

Sea Turtle ◽

Longline Fishery ◽

Sandbar Shark ◽

Migratory Species ◽

Scalloped Hammerhead ◽

Spatial Management

AbstractSpatial management for highly migratory species (HMS) is difficult due to many species’ mobile habits and the dynamic nature of oceanic habitats. Current static spatial management areas for fisheries in the United States have been in place for extended periods of time with limited data collection inside the areas, making any analysis of their efficacy challenging. Spatial modeling approaches can be specifically designed to integrate species data from outside of closed areas to project species distributions inside and outside closed areas relative to the fishery. We developed HMS-PRedictive Spatial Modeling (PRiSM), which uses fishery-dependent observer data of species’ presence–absence, oceanographic covariates, and gear covariates in a generalized additive model (GAM) framework to produce fishery interaction spatial models. Species fishery interaction distributions were generated monthly within the domain of two HMS longline fisheries and used to produce a series of performance metrics for HMS closed areas. PRiSM was tested on bycatch species, including shortfin mako shark (Isurus oxyrinchus), billfish (Istiophoridae), and leatherback sea turtle (Dermochelys coriacea) in a pelagic longline fishery, and sandbar shark (Carcharhinus plumbeus), dusky shark (C. obscurus), and scalloped hammerhead shark (Sphyrna lewini) in a bottom longline fishery. Model validation procedures suggest PRiSM performed well for these species. The closed area performance metrics provided an objective and flexible framework to compare distributions between closed and open areas under recent environmental conditions. Fisheries managers can use the metrics generated by PRiSM to supplement other streams of information and guide spatial management decisions to support sustainable fisheries.

Download Full-text