Conference Proceedings
http://hdl.handle.net/10862/3357
2024-03-29T08:06:41ZBurning grey: The worldwide influence of a locally published grey literature
http://hdl.handle.net/10862/6311
Burning grey: The worldwide influence of a locally published grey literature
Palcullo, Vince Ervin; Rivera, Donna May C.; Dumenden, Via Marie F.; Peleña, Ma Cynthia Tolones; Geromiano, Joy F.; Superio, Daryl
Rice is a major staple crop in the Philippines, which produces a large amount of rice each year. On the other hand, rice production generates biomass waste in the form of rice husks. In consideration of the rice husks’ potential as a biomass energy source and support the development of the rice husk gas stove technology in the Philippines, Engineer Alexis T. Belonio had published a grey literature (GL) entitled “Rice Husk Gas Stove Handbook.” Hence, to fully understand the impact of the technology, a citation analysis was conducted. The works that cited the GL were retrieved from Google Scholar using Harzing’s Publish or Perish software. The complete title of the GL was used as keywords for the search string. Results revealed that the GL was cited by 155 literatures written by 398 authors from 31 countries. Seventy-five (48.4%) of the 155 literatures were cited 797 times. The results showed the wide utilization and the impact of locally-published GL, thereby confirming GL’s value in research and development.
2022-01-01T00:00:00ZEvaluation of community-based livelihood development initiatives: The sustainable livelihood approach
http://hdl.handle.net/10862/6420
Evaluation of community-based livelihood development initiatives: The sustainable livelihood approach
Salayo, Nerissa D.; Castel, Raisa Joy G.; Montinola, Quenie S.; Diamante, Rose Ann; Kodama, Masashi
Ferrer, Alice Joan
The sustainable livelihood approach (SLA) is a tool for evaluating livelihood strategies that utilize assets categorized as environmental, human, physical, financial and social assets. In this study, the SLA was applied to determine the main factors that influence the adoption of integrated multi-trophic aquaculture (IMTA) in milkfish (Chanos chanos Forsskål) farming among fisherfolks. The community-based field trials conducted in Nueva Valencia in Guimaras province for 4 years since 2015 revealed that stakeholders were receptive to IMTA and were able to situate its effects on livelihood assets. The assessment of 52 stakeholders showed small but significant improvements in most livelihood assets during the 3-phased evaluation period. Using the 5-scale Likert rating, the environmental livelihood assets were rated highest but showed slight significant decline due to perceived weather and water level changes that may have negatively affected fish production and income. Financial livelihood assets were initially rated low but significantly improved due to supplemental income derived from wages and harvest. The human livelihood assets significantly improved due to sustained hands-on aquaculture experience. Social livelihood assets also improved due to cohesive interaction during projects implementation. In contrast, the acquisition of physical livelihood assets did not significantly improve because these assets were not commensurate with the many stakeholders who would like to have access to these shared assets. Overall, stakeholders expect IMTA’s potential environmental and economic benefits to overcome additional adoption costs. These include the cost of physical and financial investments in seeds of co-culture species and modified enclosures. Stakeholders expect institutional and government support on further studies on the technical details of IMTA. Fisheries and aquaculture regulations should embed the necessary support systems for the adoption of IMTA and ensure a positive public perception of aquaculture.
2022-01-01T00:00:00ZInnofloc: Innovative biofloc technology for the nursery production of shrimp, Litopenaeus vannamei in tanks
http://hdl.handle.net/10862/6419
Innofloc: Innovative biofloc technology for the nursery production of shrimp, Litopenaeus vannamei in tanks
Caipang, Christopher Marlowe; Trebol, Kathleen Mae P.; Abeto, Marian Jill S.; Coloso, Relicardo M.; Pakingking, Rolando V., Jr.; Calpe, Adelaida T.; Deocampo Jr., Joel E.
Ferrer, Alice Joan
Nursery systems are valuable production tools in shrimp aquaculture and are effective biosecurity facilities for the high-density culture of shrimp postlarvae (PL), resulting in healthy and uniform-sized juveniles. The nursery production of shrimp is usually carried out in small ponds; however, the use of small and circular tanks with plastic liners is gaining popularity. From an industry standpoint, there is a need to assess how nursery systems can improve the productivity of the shrimp production cycle. Hence, the use of small circular tanks coupled with the incorporation of biofloc technology was assessed in terms of its viability during the nursery production of the Pacific whiteleg shrimp, Litopenaeus vannamei. A 450m<sup>2</sup> plastic-lined circular tank was installed and prepared for the stocking of L. vannamei postlarvae (PLs) at a density of 500 PLs per m<sup>2</sup>. Biofloc was produced and maintained throughout the nursery phase by adding brown sugar as a carbon source at carbon to nitrogen (C:N) ratio of 10. Daily monitoring of the various water quality parameters was carried out, while presumptive Vibrios were enumerated weekly. The shrimp juveniles were sampled for their body weight on the 14th day post-stocking and weekly until harvest on the 30th day of culture. The different water quality parameters were within optimum levels required for shrimp growth. Presumptive Vibrios were dominated by the yellow colonies. The shrimp attained 100% survival with an average body weight of 1.26 g and a feed conversion ratio (FCR) of 0.43 at the end of the nursery production phase. Our results indicate that the use of small circular tanks with biofloc during the nursery production phase of whiteleg shrimp is feasible and can be incorporated during the grow-out culture for improved and continuous production of this shrimp species.
2022-01-01T00:00:00ZBacterial microbiota of hatchery-reared freshwater prawn Macrobrachium rosenbergii (De Man, 1879) and their pathogenicity
http://hdl.handle.net/10862/6418
Bacterial microbiota of hatchery-reared freshwater prawn Macrobrachium rosenbergii (De Man, 1879) and their pathogenicity
Monghit-Camarin, Ma-ann; Cruz-Lacierda, Erlinda R.; Pakingking, Rolando V., Jr.; Cuvin-Aralar, Maria Lourdes; Traifalgar, Rex Ferdinand; Añasco, Nathaniel C.; Austin, Frank William; Lawrence, Mark Lee
Ferrer, Alice Joan
Quantitative and qualitative analyses of bacterial microbiota associated with hatchery of Macrobrachium rosenbergii (de Man, 1879) were conducted over three larval cycles, along with important water quality parameters. Physicochemical parameters (temperature, DO, salinity, pH, and total ammonia) of culture water were within the optimum level required for the hatchery phase of M. rosenbergii. Significant differences in aerobic plate count (APC) among larval stages were observed. Ten genera and 17 species were identified with the predominance of Gram-negative bacteria constituting 63 % of all isolates (n = 706). A total of 17 dominant bacterial isolates randomly selected from freshwater prawn larvae were screened for in vitro hemolysin activity using blood agar plate (BAP) medium with 5% sheep blood. Pathogenicity of the isolated bacterial strains was assessed through in vivo infection bioassay. Out of the 17 isolates tested, six isolates showed α – β zone of hemolysis on the BAP, i.e., Aeromonas caviae, Bacillus cereus, Plesiomonas shigelloides, Staphylococcus warneri, Vibrio cholerae non-01, and Vibrio furnissii, were used in the infection bioassay. The current data indicate that the six bacterial isolates tested, particularly B. cereus and V. cholerae non-01, are opportunistic pathogens capable of inducing disease epizootics, particularly in freshwater prawn hatcheries with suboptimal rearing water conditions. Thus, control measures to reduce the influx of pathogenic microbes in the system by maintaining good water quality and good farm management practices through disinfection of culture facilities, rearing water, and Artemia cysts, the practice of good hygiene of personnel, regular water exchange, and feed regulation, among others, and cautionary use of antibiotics, can be adopted.
2022-01-01T00:00:00Z