Now showing items 1-5 of 5

    • Article

      Economic feasibility analysis of the monoculture of mudcrab (Scylla serrata) Forsskal 

      RF Agbayani, DD Baliao, GPB Samonte, RE Tumaliuan & R Caturao - Aquaculture, 1990 - Elsevier
      Mudcrabs, Scylla serrata Forsskal, were monocultured at different stocking densities: 5000, 10 000, 15 000 and 20 000/ha for 90 days. Highest mean weight, survival and relative growth increment (P>0.05) were obtained from a stocking density of 5000/ha. Best feed conversion ratio of 1.72 and corresponding gross production of 1019 kg/ha per crop were attained at the same stocking density. The economic indicators, i.e., return on investment and return on equity, were also highest at 5000/ha stocking density and the payback period was shortest. Partial budgeting showed that no incremental benefit accrued from stocking beyond 5000/ha. Sensitivity analysis showed that even if the value of mudcrab were to decrease by 28%, mudcrab monoculture would still be economically viable.
    • Article

      Economics of microalgae (Chaetoceros calcitrans) production using the multi-step method in the Philippines 

      GPB Samonte, CC Espegadera & R Caturao - Aquaculture, 1993 - Elsevier
      The use of live microalgae for food during the early stages of the life cycle of shrimp larvae is considered essential. The microalga Chaetoceros calcitrans was mass produced at the Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC/AQD) using the multistep method. The alga was grown in batches using successively larger containers. A cell density of 2.65 × 106 cells/ml was obtained from the final 4-day culture of C. calcitrans. Production cost using this method was P715.50/ton (US$ 1.00=25 Philippine pesos). The minimal costs involved in this method make it an affordable technique for the mass culture of microalgae.
    • Article

      Gracilaria (Rhodophyta) farming in Panay, Western Visayas, Philippines 

      AQ Hurtado-Ponce, GPB Samonte, MRJ Luhan & NG Guanzon Jr. - Aquaculture, 1992 - Elsevier
      Interviews were conducted among eight Gracilaria growers in Panay, Western Visayas, Philippines from March to July (1990) using a structured questionnaire. The "rice planting" method was employed by farmers growing seaweeds in natural drainage canals and ponds. Initial harvests are made 15–60 days after planting. Higher production [ 7–14 t (dry) ha−1 year−1] are obtained from cultures in canals than in ponds [3–4 t (dry) ha−1 year−1]. The net income derived from culture in ponds is estimated at P698/crop or P6313/year (US$234/year). A higher net income of P4936/crop or P41766/year (US$1547/year) was generated from Gracilaria farming in canals. Returns on investment (ROI) from farming in ponds and canals are 39% and 908%, respectively. Payback period is 2 months in canal farming and 1.8 years in pond farming.
    • Conference paper

      Socio-economics of oyster and mussel farming in Western Visayas, Philippines 

      GPB Samonte, SV Siar, RS Ortega & LT Espada - In LM Chou, AD Munro, TJ Lam, TW Chen, LKK Cheong, JK Ding, KK Hooi, HW Khoo, VPE Phang, KF Shim & CH Tan (Eds.), The Third Asian Fisheries Forum. Proceedings of the Third Asian Fisheries Forum, 26-30 October 1992, Singapore, 1994 - Asian Fisheries Society
      Among the economically important bivalves, the slipper oyster (Crassostrea iredalei) and green mussel (Perna viridis) are predominantly being farmed in the Philippines. Oyster and mussel farms in the Western Visayas region have increased because of the need for supplementary sources of income brought about by the dwindling catch of small-scale fishermen. Socio-demographic and costs and returns data were gathered from 175 oyster and mussel farmers using a combination of rapid rural appraisal techniques and a pre-tested questionnaire. Oyster and mussel farms, less than 1000 m2, were located among fish capture devices in rivers and bays. The oyster and mussel farmers belong to the marginalized sector of society with about 30% of total household income derived from oyster and mussel farming. Problems encountered by oyster and mussel farmers included poaching, mortality due to siltation or sedimentation and pond effluents, no spat, lack of financing, and lack of buyers. This study recommends that oyster and mussel farmers form cooperatives to effectively market their produce and avail of financing, and research on the non-occurrence of spat.
    • Article

      A survey of small-scale fishermen's credit practices in Panay, Philippines 

      GPB Samonte & RS Ortega - Philippine Quarterly of Culture and Society, 1992 - University of San Carlos Publications
      In the Philippines, small-scale fishermen have traditionally relied on informal lenders in view of the limitations of self-finance and the lack of access to bank credit. An assessment of credit practices and its availability in 5 coastal communities: Culasi, San Jose, Concepcion, San Dionisio, and Nueva Valencia, was conducted from February to August 1990. Ninety-six percent of the respondents surveyed considered fishing as their major source of income with average earnings from fishing of P1982/month (25 Philippines Pesos = US$1.). Hook and line, gill net, jigger, and spear are the common fishing gears used. Credit was obtained by 83% of the fishermen surveyed and was used mainly for food and household expenses, and fishing operations. Credit ranging from P20 to P20,000 was obtained from informal or non-institutional sources, such as relatives, friends, small store owners, and traders. Informal credit sources were preferred over formal or institutional sources for the following reasons: accessibility (51%), fast credit extension (31%), liberal terms (25%), and being only source known to the fisherman (18%). Analysis showed that income has a highly significant linear correlation with amount of credit (r2=0.1311). Income from fishing is not enough to cover the basic necessities of a small-scale fisherman's household, hence the dependence on informal credit.