Now showing items 1601-1620 of 4221

    • BFAR-CHED Philippine National Aquasilviculture Program (PNAP) in Bataan 

      Flores, Rudy C.; Tungol, Felicisima E.; Antonio, Abraham S.; Medairos, Elizabeth D.; Salas, Jonathan M. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Under the Philippine Aquasilviculture Program, the Bataan Peninsula State University (BSPU) rehabilitated denuded mangrove resources, established aquasilviculture technology demonstration projects as a livelihood option for fisherfolks (while caring for the mangroves they had planted) and established community-based multi-species hatcheries to increase endemic fish species in the area. The BPSU was able to (a) plant 183, 300 mangrove seedlings where 85.96% survival was noted a year after, (b) establish 16 units aquasilviculture projects for the livelihood of the beneficiaries (planting that earned the beneficiaries P1,338, 731.90); and (c) establish community-based multispecies hatcheries that already produced an estimated 1,030,502,400 eggs of various fish species, thus increasing the wild fishery resource in the area. The program is expected to bear potential impacts on our environment and to the lives of the marginalized people of our community through the collaborative efforts of the Bureau of Fisheries and Aquatic Resources (BFAR), the Commission on Higher Education (CHED), BPSU, Local Government Units (LGUs) and the fisherfolks.
    • Community-based shrimp stock enhancement for coastal socio-ecological restoration in the Philippines 

      Altamirano, Jon; Kurokura, Hisashi; Salayo, Nerissa D.; Baticados, Didi; Suyo, Jee Grace; Ishikawa, Satoshi (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      The reality of declining quality of coastal areas has been evident for many developing countries, especially in Southeast Asia. In the Philippines, rural coastal zones and estuaries are now being characterized by declining wild fisheries resources and degrading environment. This paper presents, as an example, the typical rural coastal towns of New Washington and Batan in Aklan province, Philippines and showcases how the concept of shrimp stock enhancement can provide incentives to restore the environment and provide sustainable fishing livelihood in the area. The New Washington-Batan Estuary in northeast Panay Island, Philippines was a productive fishing ground that has been in a state of degenerating brackishwater fisheries and estuarine environment. Average daily catch composed of various species decreased from 24 kg in 1970s to 0.7 kg at present. Shrimp fisheries, the most important livelihood, declined in quality and quantity. The highly-priced and once very abundant tiger shrimp Penaeus monodon was replaced with smaller-sized and lower-priced species like the Metapenaeus ensis. These can be attributed to the conversion of 76% of mangroves to culture ponds in the past 50 years and more than 400% increase in fishing gears since the 1990s. The need to reduce fishing structures and rehabilitate mangroves is evident. However, these drastic changes directly affect fishers livelihood. This paper explores the prospects of P. monodon stock enhancement as positive reinforcement for the estuary s rehabilitation. Number of gears per fisher may have to be reduced but shrimp catches will be relatively high-priced. Simulations with additional tiger shrimp caught due to stock enhancement show that fishers can increase income by more than 4 times from their current PhP 34 gear-1 day-1. Campaigns on the importance of mangrove especially as shrimp habitat can encourage local communities to reforest the estuary especially in abandoned ponds. With effective management, law enforcement, and sustained support from different sectors, shrimp stock enhancement can be a positive strategy in estuarine rehabilitation and livelihood sustainability in the New Washington-Batan Estuary.
    • Social preparations towards community-based approach to stock enhancement in Sagay Marine Reserve, Philippines 

      Salayo, Nerissa D.; Castel, Raisa Joy G.; Tormon, Dianne Hope M.; Barrido, Rafael T.; Nievales, Marie Frances J.; Azuma, Teruo (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Stock enhancement involves a set of management approaches which include the release of hatchery-produced aquatic organisms to enhance or restore fisheries. Stock enhancement of various species has a long history in developed countries and it showed that releases have the potential to yield substantial benefits for various fishery stakeholders. While the biological objectives of stock enhancement were often successfully achieved in most of these enhancement initiatives, some results showed that actual social gains in terms of yields, distribution of benefits and institutional sustainability are often inconclusive. The high cost of stocking accrues to the government which means these are supported by public funds. Meanwhile, benefits are dissipated across various stakeholders, some of them did not at all contribute and participate in the stocking program. In such government-initiated and publicly-funded stock enhancement programs, the lack of sense of stewardship among direct fishery stakeholders was observed to have contributed to a vicious cycle of excessive extraction of fishery resources for individual economic benefits. Developing countries such as the Philippines would be confronted by budgetary limitations if it has to adopt the stocking strategies applied in developed countries. Thus, with reference to the success of co-management approaches for managing fishery resources in the Philippines, a community-based strategy for enhancement of fishery stocks was explored. SEAFDEC/AQD, with support from the Government of Japan Trust Fund, initiated a community-based approach to stock enhancement in Molocaboc, an island barangay or village within the Sagay Marine Reserve (SMR). The initiative aims to ensure that its goals and strategies are within the social milieu of local stakeholders, i.e. fisherfolks are without financial assets to contribute or pay for the enhancement of the fishery and stock enhancement is often not a priority approach to address fishery resource depletion for most local governments. However, the social assets of fishing communities could be explored to implement stock enhancement. This paper describes the social preparation executed from 2007 to 2011 in order to orient a fishing community such as Molocaboc towards a successful enhancement of overfished species. Initially, the project focused on donkey s ear abalone Haliotis asinina to provide an example for other species. Abalone or kapinan in the vernacular is one of the over-extracted fishery resources in Sagay City. It is one of the high-priced catch among fishers in coastal communities in the Philippines. High buying prices compared with other fish catch motivated small-scale fishers to target abalones and caused its overfishing.
    • Abalone aquaculture for stock enhancement and community livelihood project in northern Palawan, Philippines 

      Gonzales, Benjamin J. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      One of the interventions to feed the poorest of the poor fisheries sector in the country is the provision of livelihood in the form of mariculture of high value marine species. In the Philippines, livelihood in rural areas is largely linked to resource depletion, hence it is wise not only to provide livelihood to the community but also to encourage them to conserve and enhance the resources. As part of the revised R&D program, the Western Philippines University partnered with NGO and existing projects to embark on a community-based environment-concerned livelihood project, using hatchery bred abalone, although top shell was also considered for stock enhancement. This is in an on-going project thus, preliminary phases such as abalone production and cage-based grow-out as well as subsequent project plans will be discussed. The objectives of this study were to: (a) share the implementing experiences in this project, (b) identify success and failure drivers of the project, (c) explain the conceptual framework for the MPA-based stock enhancement to be used in this project, and (d) give recommendations to improve the implementation and ensure the success of the project. The following activities have thus far been conducted: (a) development of criteria for cage micro-site selection; (b) writing of proposal and provision of financial assistance for hatchery juvenile production through a partnership MOA; (c) presentation of site survey results to beneficiaries and stake holders; (d) conduct of trainings on abalone grow out culture to POs; (e) development and improvement of training module; (f) signing of conservation agreement; (g) giving of cage materials and juveniles to people s organizations; (h) on site coaching; and (i) partial monitoring. The next activities include improvement in juvenile production, conduct of researches on abalone nutrition, and development of market and value chain flow analysis. The conceptual framework for community-managed stock enhancement will follow that of the Department of Environment and Natural Resources-ICRMP, of which the stock enhancement project is anchored on the management of marine protected areas or MPAs. The steps in all the activities were documented and while the project was in progress, performance of the participants in training were measured, the training module was improved, the training approaches were revised according to needs, and the growth and survival of juvenile abalone were monitored. The problems identified were low production of juveniles, insufficient food for grow-out, political squabbles, social preparation, and delay in implementation schedule. Recommendations to improve or resolve the problems encountered were also presented in this paper.
    • Stock assessment of christian crabs (Charybdis feriatus, Linnaeus, 1758) in San Miguel bay 

      Nieves, Plutomeo M.; Olfindo, Nelson R.; Macale, Aldrin Mel (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Assessment of the status of swimming crab fisheries in San Miguel Bay with focus on Christian or Crucifix crab, Charybdis feriatus, was undertaken from November 2011 to January 2013. An analytical length-based fish stock assessment was employed using the FISAT (version 1.2.2). A total of 7,679 length frequencies (3,612 C. feriatus and 4,067 Portunus pelagicus) were used in the analysis. About 15 and 14 percent gravid females were harvested monthly for both species that may contribute to recruitment overfishing. Population parameters showed exploitation rate (E) for P. pelagicus and C. feriatus exceeded the optimum exploitation (E0.5) implying excessive fishing effort and heavily exploited stocks. Size at maturity of C. feriatus and P. pelagicus in San Miguel Bay is 8.3 cm and 8.5 cm, respectively. Doable options for resources conservation and management strategies are proposed and supported by local government units (LGUs) including the Integrated Fisheries and Aquatic Resource Management Council.
    • Assessment of humphead wrasse (Cheilinus undulatus), spawning aggregations and declaration of marine protected area as strategy for enhancement of wild stocks 

      Romero, Filemon G.; Injaki, Akkil S. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Humphead wrasse, known as the Napoleon fish (Cheilinus undulatus), is the largest living member of the family Labridae. It is slow growing but can grow to a maximum size exceeding 2 m and 190 kg. This species was the first commercially important coral reef food fish to be listed in the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) Appendix II in 2004 because of its vulnerable status and the ongoing threat to its conservation from international trade. Like many coral reef fishes, the humphead wrasse, Cheilinus undulatus, aggregate in reef areas when they spawn and this spawning behaviour makes them highly vulnerable to overfishing. Assessment of the spawning aggregations of this species was conducted in the municipalities of Sibutu and Sitangkai in the province of Tawi-Tawi, Philippines. Key informant interviews (KII) with fishermen, mariculturists, and other stakeholders and focus group discussions (FGD) with local government leaders, Fisheries and Aquatic Resources Management (FARMC) members, mariculturists, and exporters were conducted. Guided by the results of these KII and FGDs, underwater visual census of mameng (local common name for Napoleon wrasse) populations (juvenile and mature) were conducted to document spawning aggregation sites. Since there was no photo-documentation of actual spawning aggregations of mameng in the reef areas, indirect measures were used. Result of the KII and FGD indicated that the Baligtang Reef in Sipangkot and Tando Owak are major sources of spawners. Anecdotal accounts of Bajau fishermen showed that Dungun Dungon, Baligtang reef, Tando Owak and Tugalan are traditional fishing grounds for mameng spawning aggregations. From the length-frequency analysis of mameng caught by hook and line and fish pot in the Baligtang Reef in Sipangkot, the estimated length at maturity of this species was found to be 25-35 cm. There were 134 individuals caught within this size range so they are considered potential spawners. Another indirect proof used was the underwater documentation of juvenile humphead wrasse which were regularly observed and photographed in association with seagrass beds and branching coral reefs in Baligtang Reef in Sipangkot, Sitangkai. Gonadal study also indicated that the mameng caught in this area had mature and ripe gonads but the number of mature fish depends on the season. These were the basis of declaring Spawning Aggregation Sites in Tando Owak and Dungun Dungun in Sibutu and Baligtang Reef, Sipangkot and Tugalan in Sitangkai. These were declared as marine protected areas by ordinance of the municipal Sangguniang Bayan of the two municipalities. Management and enforcement plans have been developed and Bantay Dagat have been trained to protect the spawning aggregations and this strategy aims to protect the wild stocks of humphead wrasse. Protecting the spawners would ensure that there would be enough recruits, prevent recruitment overfishing and enhance the wild stocks.
    • Good aquaculture practices (VietGAP) and sustainable aquaculture development in Viet Nam 

      Nguyen, Thi Bang Tam (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      The shrimp (black tiger and white leg shrimp) and catfish industries in Viet Nam continue to experience increasing growth due to rapid aquaculture development. However, disease outbreaks become a major issue. Moreover, seafood consumers at present are likely to be more concerned about how the products are produced and how to control/manage aquatic animal health instead of treatment. Hence, the main objective of this abstract is to focus on one of the solutions to address these problems/issues and ensure sustainable aquaculture development in Viet Nam.
    • The Philippine National Aquasilviculture Program 

      Dieta, Romeo E.; Dieta, Florida C. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      The Philippine National Aquasilviculture Program (PNAP) is a banner program of the Department of Agriculture (DA) being implemented by the Bureau of Fisheries and Aquatic Resources (BFAR). To implement the PNAP, a Memorandum of Agreement (MOA) was executed between BFAR and the Commission on Higher Education (CHED). The program concept is primarily mangrove resource rehabilitation and livelihood provision to help address climate change, food security and poverty among municipal/artisanal coastal fisherfolks. To achieve its goals and objectives, the BFAR identified three strategic interventions, such as: (1) replanting of destroyed mangrove resources; (2) establishment of community-based multi-species hatcheries (CBMSH), and (3) provision of aquasilviculture livelihood projects to fisherfolkbeneficiaries throughout the country. As envisioned, the BFAR shall provide support funds for the establishment, operation and management of the PNAP while CHED shall provide logistical support during program implementation. The program covers at least 71 state universities and colleges (SUCs) and 61 provinces throughout the country. Potential areas targeted by the PNAP are abandoned, undeveloped and underutilized (AUUs) fishpond lease agreements (FLAs) and the Department of Environment and Natural Resources (DENR) identified areas (Key Biodiversity Areas, reforestation areas and co-management agreement areas) from BFAR coastal Regions 1 to 13 and the Autonomous Region of Muslim Mindanao (ARMM). Participating agencies are DA-BFAR Regional Fisheries Offices (RFOs) and Provincial Fisheries Offices (PFOs), CHED (SUCs), DENR Provincial Environment and Natural Resources Offices (PENRO) and Community Environment and Natural Resources Offices (CENRO), and the local government units (LGUs) in the provinces and municipalities. Target beneficiaries for the aquasilviculture livelihood projects are at least 1,000 coastal fisherfolks and for the community-based multi-species hatcheries are 64 SUCs who were signatories to the MOA. For mangrove rehabilitation, the PNAP will involve the coastal fisherfolks in the planting of 100 million propagules for the next 3-4 years. Funding support from BFAR are PhP 6.00 per surviving propagule, PhP 1.2 million per SUC for the establishment and operation of CBMSH and PhP 65,000 per aquasilviculture project. As part of the over-all management strategy, a National Steering Committee (NSC) was formed to formulate policy guidelines of the PNAP while Regional Steering Committees (RSCs) were created to oversee policy implementation in the regions. Program Management Offices (PMOs) were formed to implement and supervise program implementation in the provinces. Community Organizers (COs) were hired in each province to assist in the implementation of daily activities. The approved PNAP implementing guideline details the procedures to follow, both relating to the technical and administrative operations of the program.
    • Inland fisheries resource enhancement and conservation practices in Myanmar 

      Thein, Htun (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Myanmar has impressive freshwater capture fisheries. Inland freshwater bodies cover 8.1 million ha of which 1.3 million ha are permanent while the rest are seasonally inundated floodplains. There are repeated references to the crucial importance of fish and fish products in the nutrition of the Myanmar people. Over the past few decades, inland fisheries resources have increased pressure from overfishing, use of destructive fishing gear/methods, pollution and environment changes. In order to make a sustainable inland capture fisheries and conservation of aquatic biodiversity as well as nutritional security and improved rural livelihoods, fisheries resource enhancement and conservation measures have long been adopted in Myanmar since 1967, initiated through a seed replenishment program in natural waters, such rivers, lake, dams, even rice fields, etc. However, the institutional, policy, legislative and financial environments under which enhancement and capture fisheries regimes exist are not conducive to the interests of the fishers. Strong tools for valuation of ecosystem goods and services, enabling governance arrangements and estimation of environmental flows are needed. Fishing communities need to be organized into strong co-management/participatory/community regimes in order to ensure that all stakeholders take part in decision-making process and the benefits accrued are shared equitably by all.
    • Status of resource management and aquaculture in Malaysia 

      Yusoff, Aishah (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Malaysia is a maritime nation and its fishing industry is a source of income for 134,000 fishermen. In 2012, the fisheries sector produced 1.7 million tons of fish valued at RM10.8 billion and generated trade worth RM6 billion. The landings from capture fisheries are expected to increase from 1.32 million tons in 2010 to 1.76 million tons in 2020 at an annual growth rate of 2.9%. In 2012, 65% of total catch was contributed by the coastal fisheries as compared to 35% from deep sea fishing. Landing from deep sea fishing is expected to rise from 381,000 tons in 2012 to 620,000 tons in 2020. Deep sea fishing has been identified for its potential to contribute to the increase in the country s fish production. With a growing population and an increasing preference for fish as a healthy source of animal protein, the National Agro-food Policy (2011-2020) estimated that the annual demand for fish will increase to 1.93 million tons by the year 2020. The Department of Fisheries (DOF) has developed the Capture Fisheries Strategic Management Plan (2011-2020) based on three main documents i.e.; National Agro-food Policy (NAP, 2011-2020), Department of Fisheries Strategic Management Plan (2011-2020), and Malaysia National Plan of Action on Sustainable Fisheries for Food Security towards 2020. Aquaculture is now being promoted in Malaysia as an important engine of growth and eventually to become the mainstay of the nation s economy. Situated in a region with abundant supply of land and water, two determinant factors for aquaculture activities, Malaysia has always strived to ensure that this sector is not sidelined in their development efforts. With a growing population and an increasing preference for fish as a healthy source of animal protein, it has been estimated that the annual demand for fish will increase to 1.7 million tons in 2011 and further to 1.93 million tons by 2020. From the present annual aquaculture production of about 525,000 tons, this output would need to be raised to 790,000 tons to meet the projected demand by 2020. In a move to develop the aquaculture industry, the DOF, has initiated the Aquaculture Industrial Zone (AIZ) Program involving the development of 49 zones, located across Malaysia, which will be used for culture of various types of high value aquatic species. The DOF has identified several strategic areas that would be developed for downstream activities such as fish seed production, feed mills, fish processing plants, and other supporting industries. Aquaculture is also currently listed amongst the 16 Agro-food s Entry Point Projects (EPP) of the National Key Economic Area (NKEA). The government aims to double the Agro-food sector s contribution to Gross National Income (GNI) from Malaysian Ringgit (RM) 20.2 billion in the year 2010 to RM49.1 billion by 2020, or an increase of RM28.9 billion.
    • Status of resource enhancement and sustainable aquaculture practices in Japan 

      Okuzawa, Koichi; Takebe, Takayuki; Hirai, Narisato; Ikuta, Kazumasa (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Contrary to the rapid increase in the world aquaculture production, fish production in Japan has been decreasing slightly due to the decreasing trend in seafood consumption of Japanese. Aquaculture production is approximately 20% in terms of yield, and 30% in terms of market value, of the country s total fisheries production. In Japan, about 80 species are targeted for release for sea ranching and resource enhancement purposes. The local governments (prefectures) are the main driving force in resource enhancement programs. Chum salmon, Oncorhynchus keta, and scallop Mizuhopecten yessoensisis are examples of successful resource enhancement in Japan. Japanese flounder, Paralichthys olivaceus, and red seabream, Pagrus major, represent intensely released fish species in Japan, and around 10% of the total catch of those species are estimated as released fish. The low price of products and increasing costs of production, such as costs of fuel and fish meal, are the major pressing issues in coastal fisheries and aquaculture in Japan. For aquaculture, the guarantee of food safety, minimization of environmental impact, and management of natural stock populations are highly necessary in order to achieve the sustainability of the industry. For resource enhancement, budget constraint is the major issue, and possible impact on natural stocks caused by released fish should also be considered. The Government of Japan (GOJ) is implementing some measures to rectify unstable business practices of aquaculture and to improve production techniques in aquaculture. For resource enhancement, the GOJ encourages cooperation among local governments (prefectures) for seed production and release of certain targeted species in order to reduce the cost and improve the efficiency of stock enhancement. In Japan, traditionally, the purpose for release was mainly sea ranching, namely harvesting all released animals. Nowadays, actual resource enhancement, i.e. the integrated release program including resource management and development of suitable nursery for released fish, is encouraged by the government. The evaluation and counter measures for the negative impact of stocked fish on genetic diversity of the wild population are also implemented. Recently, marked progress was achieved in seed production technologies of two important tropical fish species, namely coral trout, Plectropomus leopardus, and humphead wrasse, Cheilinus undulatus. These technologies are expected to contribute to the advancement of the aquaculture industry in the South East Asian region.
    • Current status of sustainable aquaculture in Cambodia 

      Lang, Ouch (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      In Cambodia, the extension of technologies in fish aquaculture is a vital activity that contributes to improving the daily livelihood of the rural poor farmer communities. Technology extension was introduced since 1994 through a project of the Asian Institute of Technology (AIT) and other local non-government organizations (NGOs) or international organizations (IOs) in some fish production deficient provinces. Prior to the introduction of such activities, wild fish were still abundant. From then to date, aquaculture extension is being done under the Freshwater Aquaculture Improvement and Extension Project Phase II of Japan International Cooperation Agency (FAIEXII-JICA), and Department for International Development/Danish International Development Agency (DFID/DANIDA) Projects. Recently, aquaculture extension is one of the national policies under the National Rectangular Strategy Policies of the Government. There are several different freshwater aquaculture systems including floating cage/pen culture, earthen pond culture and rice-fish culture, and other fish culture in smallwater bodies or aquaculture-based fisheries in Cambodia as practiced in over 20 provinces and cities, with less development focused on coastal aquaculture. Freshwater aquaculture production continued to grow over the past two decades and increased from 1,610 tons in 1984 to 20,760 tons in 2004, representing 11.9 times increase or growth of 16.3% per year This further increased to 74,000 tons in 2012, representing 11.9 times increase or a growth rate of 15% per year. However, aquaculture development in Cambodia is in its infancy stage compared to other countries in the region. It has encountered some problems and constraints during its development, which include inadequate and unreliable supply of good quality seed; lack of capital, fund or credit for aquaculture investment; inadequate knowledge of aquaculture technology; inadequate manpower for aquaculture extension service; and climate change, which have adversely impacted aquaculture development in Cambodia. In order to achieve the goal of supplying the nation s future fishery requirements through aquaculture, the Cambodia Fisheries Administration (FiA) published the Strategic Planning Framework (SPF) for Fisheries (2010-2019). Within this framework, the scenarios for future fish demand-supply for 2019 suggest that aquaculture production will increase by 15% per year to 185,000 tons by the end of 2019.
    • Rapid adaptation to a new environment: is it reversible? 

      Araki, Hitoshi (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Accumulating evidence suggests rapid adaptation of fish populations when they are exposed to artificial hatchery environments. However, little is known if rapidly-adapted populations can readapt to their original, natural environment at the same rate. Here, I review recent studies on salmonid fish that address this issue. They indeed suggest rapid adaptation of hatchery populations, in which reproductive fitness under a natural environment became much lower than that in the wild population after only 1-2 generations of captive breeding. However, the reproductive fitness did not recover after one generation of natural rearing, implying that rapid adaptation to a new environment was not reversible at the same rate. I discuss potential consequences of the irreversible fitness reduction in extensively stocked fish species. Understanding the mechanism behind the irreversible rapid adaptation in fish populations will help us figure out a better, nature-friendly, and hence sustainable means of hatchery operations for human welfare.
    • Is small-hold tropical aquaculture in a genetic plunge towards extinction? 

      Doyle, Roger W. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)
      Tropical shrimp aquaculture is in a disease-induced crisis of lost production. The response to this crisis currently focuses on microbiology and pathology, quarantine, and transboundary transfer of shrimp. The crisis also involves an interaction between shrimp genetics and various human interests including protection of intellectual property. Breeders of high-quality strains generally employ (and are encouraged to employ) some form of breeder lock that generates inbreeding when broodstocks are copied . Smaller hatcheries sell these copied, inbred shrimp to farmers, who thereby increase the likelihood of losing their crops to disease. The joint behavior of breeders, hatcheries and farmers causes inbreeding to accumulate in tropical regions. The depressive effect of inbreeding on disease resistance is exceptionally strong in shrimp, as shown in a re-analysis of published field and experimental data. Inbreeding increases the severity and frequency of disease through a variety of mechanisms. We have relatively few, marker-based estimates of accumulated inbreeding in any non-pedigreed shrimp aquaculture system. Simulation shows, however, that locked post larvae (PLs) can be distinguished from copies in broodstocks and farm ponds, given appropriate analysis of genetic markers. Culture of stocks certified to be free of specified pathogens (specific pathogen free or SPF stocks) is strongly recommended and only SPF stocks can now be legally imported into most jurisdictions. These recommendations are appropriate, beneficial and necessary. But insofar as they increase the commercial value of proprietary genetic strains, such regulations may also increase the likelihood of copying, and thus inbreeding at farm level and ever-increasing susceptibility to disease and climate stress (Doyle, 2014a). The intellectual property value of disease-resistant strains will be extremely high and intellectual property rights are fundamental to science-based economic innovation. Breeders will, and must, continue to protect their genetic improvement programs with genetic locks, especially in regions where judicial sanctions are ineffective. The regulatory objective should be to encourage biosecurity and genetic progress while discouraging copying and consequent inbreeding. The current consensus that inbreeding is unimportant may therefore be out of date. Inbreeding may be amplifying the severity of diseases (including the major current threats: white spot syndrome virus or WSSV, infectious hypodermal and hematopoietic necrosis virus or IHHNV and early mortality syndrome or EMS (acute hepatopancreatic necrosis disease or AHPND). Continuing to ignore the interaction between inbreeding and disease may become a fatal error for tropical shrimp aquaculture.
    • Some import/export laws affecting the ornamental fish trade 

      Surtida, Augusto P. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)
    • 'No' to cyanide fishing! 

      Dagoon, N. J. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)
    • AQD's marine ornamental fish project 

      Castaños, Milagros T.; Southeast Asian Fisheries Development Center, Aquaculture Department (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)
    • The marine aquarium 

      Surtida, Marilyn B. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)
    • The international trade in marine ornamental fish 

      Surtida, Augusto P. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)
    • New waste disposal system for poultry-fish culture 

      Ayyappan, T. Muthu (Aquaculture Department, Southeast Asian Fisheries Development Center, 1999)