Now showing items 1-7 of 7

    • Article

      Broodstock transplantation: An approach for stock enhancement of the 'kapis' shell Placuna placenta along Panay Gulf, central Philippines 

      JA Madrones-Ladja, ET Aldon & DD Baliao - The Philippine Agricultural Scientist, 2012 - College of Agriculture, University of the Philippines Los Baños
      The Panay Gulf in central Philippines once supported a substantial ‘kapis’ Placuna placenta (Linnaeus) population that was among the six major sources for this species. However, stock depletion began in the late 1980s because of overexploitation and destructive fishing practices. To recover the declining ‘kapis’ fishery along the Gulf, a broodstock transplantation program was initiated in 1999. Results from a survey of the Gulf prior to this program confirmed reports of resource depletion. Four (4) transplantation sites (S) with natural soft-muddy substrata in adjacent coastal towns, namely, Tigbauan (S1 and S2), Guimbal (S3) and Oton (S4) were established and stocked with 3200 (1:1 male to female ratio) sexually mature ‘kapis’ broodstock collected from nearby Negros Island in March–October 1999. Transplant survival along the sites ranged 80–100%. Spontaneous spawning by ‘kapis’ transplants occurred from March 1999 (15 d after first stocking) through May 2000. Larvae (5 larvae per L) began to appear at S1 15 d after transplantation and progressively increased in density to 23 larvae per L in November 1999. During this period, local divers reported big patches of ‘kapis’ juveniles [shell length (SL), 38 ± 11 mm] at S4. Sex ratio of recruits was 3:2 (male: female). Larvae became abundant off the nearby coasts with a strong recruitment pulse at 160 larvae per L at S4 by January 2000. Likewise, transplants taken to the laboratory were induced to spawn by photochemical method, and thus validated the spawning that occurred in transplantation sites. Juvenile recruits were of variable sizes, indicating that spawning was not simultaneous. Sexually mature juvenile recruits (40% female, 90% male) were already observed in January–February 2000. The recruitment apparently resulting from these transplants was local, dispersion ranging from zero to a few kilometers distance from transplantation sites. ‘Kapis’ harvest began in 2007 for local market consumption while commercial harvest was done in 2010 with approximately 600 tons.

      The repopulation of ‘kapis’ along Panay Gulf after a decade indicated the success of the restocking program which was attributed to the suitability of the species, reproduction of transplants and the proper management of the newly established resource by the coastal fishers who are members of a local organization (FARMC) with the support of local government units (LGUs).
    • magazineArticle

      Environment-friendly practices in the aquafarm 

      ET Aldon & RY Buendia - SEAFDEC Asian Aquaculture, 1998 - Aquaculture Department, Southeast Asian Fisheries Development Center
      An outline is given of various environment-friendly management practices in aquaculture, considering the following: 1) feed right; 2) avoid antibiotics; 3) reuse and cycle water; 4) use settling or sedimentation ponds; 5) provide mangrove buffer zone; and, 6) practice polyculture or integrated farming.
    • magazineArticle

      Environment-friendly schemes in shrimp farming 

      ET Aldon - SEAFDEC Asian Aquaculture, 1999 - Aquaculture Department, Southeast Asian Fisheries Development Center
    • magazineArticle

      Seaweeds: Utilization and product applications 

      ET Aldon - SEAFDEC Asian Aquaculture, 1998 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Seaweeds have been used as food, medicine, fertilizers, soil conditioner and source of salt. Realizing the potentials of seaweeds, research and development thrusts have been geared towards improving and developing its product applications. Today, various applications of seaweeds have been developed and improved. The major success in the seaweed industry is the development of phycocolloids with the following specific applications: 1) agar; 2) carrageenans; and, 3) alginates.
    • Article

      Socio-cultural context of fishers’ participation in coastal resources management in Anini-y, Antique in west central Philippines 

      MET Aldon, AC Fermin & RF Agbayani - Fisheries Research, 2011 - Elsevier
      The vicious cycle of poverty, overfishing and resource degradation in coastal communities in the Philippines calls for action that will address the problem of declining fish catch and degraded fish habitats. The literature has shown that an efficient and effective coastal management program can be instrumental in approaching this problem. In order to secure food and livelihood of fishers, the Southeast Asian Fisheries Development Center/Aquaculture Department collaborated with the local government of Anini-y, Antique to develop a sustainable utilization of natural marine resources through sea ranching of abalone within the Nogas Island marine protected area. Establishing a marine protected area is a means of conserving natural stocks while sea ranching is considered an effective strategy that can increase fishery resources. The two management schemes are considered as effective coastal resources management strategies. The success of a sea-ranching project is dependent not only on biophysical but also on socioeconomic factors as determinants of community participation and cooperation. A social assessment was conducted to determine the fishers’ socio-cultural characteristics, their perceptions of their coastal resources and knowledge on how to effectively manage these coastal resources. The fishers’ awareness on fishing regulations and the extent of their participation in community's coastal resources management activities were also determined. Data were collected from a household survey using a semi-structured questionnaire, focus group discussions and in-depth interviews with key informants. The fishers generally scored low in almost all aspects of their socioeconomic wellbeing. Most fishers perceived that their coastal resources were in a bad condition which they attributed to illegal and commercial fishing, increasing number of fishers and the poor enforcement of fishery regulations. However, the weighted mean scores of their knowledge on coastal resources management, awareness to fishery regulations and participation in community coastal resource management activities were average. This implied that fishers when trained and developed can become potential partners for effective coastal resources management programs.
    • Conference paper

      Sociocultural factors influencing fishers’ participation in coastal resource management in Anini-y, Antique, west central, Philippines 

      MET Aldon, DH Tormon & AC Fermin - In LL Tolentino, LD Landicho, S Wun'Gaeo & K Ikegami (Eds.), 4th International Conference : the multidimensionality of energy, economy and environmental crises and their implications to rural livelihoods : September 7-10, 2010, Bicol University, Legazpi City, Albay, Philippines, 2010 - Asian Rural Sociology Association
      Fishing is the only source of livelihood in the coastal communities. This is the reason why poverty persists in these areas. The lack of other alternative livelihood activities results to overfishing and eventual degradation of fishery resources, thus, forming a vicious cycle of poverty and resource degradation. Recognizing the importance of promoting healthy and sustainable fisheries, SEAFDEC/AQD collaborated with the local government of Anini-y to develop a sustainable utilization of natural marine resources within the marine protected area at Nogas Island, Anini-y, Antique.

      This study determined the fishers’ sociocultural characteristics and how these variables influence their participation in the community’s coastal resources management activities. Primary data were collected from household survey using semi-structured questionnaire, focus group discussion and in-depth interview with key informants. Means and frequencies were used to describe the fishers’ sociocultural and demographic characteristics while logistic regressions run by SPSS program was used to determine significance of relationships between sociocultural variables and extent of participation in coastal resources management. Results showed that age, gender, household size, distance from the shoreline, perceptions about coastal resources and fishers’ willingness to leave fishing did not significantly influence fishers’ participation in coastal resources management while fishers’ economic well being, attitude towards coastal resources and awareness level to fishery regulations showed significant influence.
    • magazineArticle

      Tigbauan and Oton: Reviving the kapis industry 

      ET Aldon - SEAFDEC Asian Aquaculture, 1999 - Aquaculture Department, Southeast Asian Fisheries Development Center