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Now showing items 71-80 of 103
An innovative biofloc technology for the nursery production of Pacific whiteleg shrimp, Penaeus vannamei in tanks
(International Network for Natural Sciences, 2022-10-09)
Nursery production of shrimp is usually done in small ponds; however, the use of small and circular tanks with plastic liners is gaining popularity. From an industry standpoint, there is still a need to assess how nursery systems can be of benefit to 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, Penaeus vannamei. A 450m<sup>2</sup> plastic lined circular tank was installed and prepared for the stocking of P. vannamei postlarvae (PLs) at a density of 500 PLs per m<sup>2</sup>. Biofloc was produced and maintained throughout the nursery phase using brown sugar as carbon source at a carbon to nitrogen (C:N) ratio of 10. Water quality was monitored daily, while presumptive Vibrios were enumerated weekly. Sampling for growth was done at the 14<sup>th</sup> day post-stocking and weekly until harvest on the 30th day. The different water quality parameters were within optimum levels required for shrimp growth. Presumptive Vibrios were dominated by the yellow colonies. At the end of the nursery phase, there was 100% survival and the shrimp attained an average body weight of 1.26 g and a feed conversion ratio (FCR) of 0.43. 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 in the grow-out culture of this shrimp species....
Field efficacy evaluation of a formalin-inactivated white spot syndrome virus (WSSV) vaccine for the preventive management of WSSV infection in shrimp grow-out ponds
(Elsevier, 2021)
A shrimp grow-out trial was conducted in four 700 m<sup>2</sup> earthen ponds in Dumangas Brackishwater Station of SEAFDEC Aquaculture Department, in Iloilo, Philippines to evaluate the efficacy of a combination of immersion- ...
Interaction effect of light intensity and photoperiod on egg hatchability, survival and growth of polychaete Marphysa iloiloensis from larva to juvenile
(Elsevier, 2021)
Polychaetes are of high commercial interest as potential feed in aquaculture industry. Despite this, knowledge of polychaete culture is limited. The goal of this study is to develop a protocol that maximizes survival and ...
The information-seeking behavior and levels of knowledge, precaution, and fear of college students in Iloilo, Philippines amidst the COVID-19 pandemic
(Elsevier, 2021-06-24)
COVID-19 pandemic is devastating the health, social, and economic well-being of citizens worldwide. The high rates of morbidity and mortality and the absence of vaccines cause fear among the people regardless of age, gender, ...
Producing young, single and meaty oyster Crassostrea iredalei (Faustino, 1932) in grow‐out culture using pouches suspended from rafts
(Wiley, 2021-06-11)
Growth and survival of the slipper oyster <i>Crassostrea iredalei</i> using traditional (tires and oyster shells) and new methods (pouches and trays) suspended from floating rafts were compared. After six months of grow-out ...
Effects of weaning on survival and growth of silver therapon (Leiopotherapon plumbeus) larvae fed live and artificial diet
(Wiley, 2021-10)
This study examined the effects of early weaning strategies on growth and survival of the silver therapon Leiopotherapon plumbeus larvae. In Trial 1, four larval age groups (8, 14, 20 and 26 days post‐hatch (dph)) were ...
Occurrence and disappearance of a non-native goby Rhinogobius sp. OR in relation to hydrological conditions in the Kamo River, southwestern Japan
(Springer, 2022-01)
We monitored the abundance of a non-native (Rhinogobius sp. OR) and two native stream gobies (R. fluviatilis and R. nagoyae) over a decade, from 1995 to 2004, in a fixed reach of a tributary of the Kamo River, southwestern ...
Aeromonas load and species composition in tilapia (Oreochromis niloticus) cultured in earthen ponds in the Philippines
(Wiley, 2020-04-14)
Aeromonas load and species composition in the rearing water, sediment, gills and intestines of healthy tilapia Oreochromis niloticus collected every 2 weeks from Days 30 to 120 after stocking in six earthen ponds in the ...
Navigating risks and uncertainties: Risk perceptions and risk management strategies in the Philippine seaweed industry
(Elsevier, 2021-04)
The Philippine seaweed industry is affected by multiple but interrelated risks. Farmers mainly encountered environment-related risks (e.g. disease, pest infestations) which, if unmanaged, could result to production failure. ...
Growth, metamorphosis and survival of orange-spotted rabbitfish (Siganus guttatus) larvae fed sodium iodide-supplemented brine shrimp (Artemia sp.)
(Elsevier, 2021-04)
In an attempt to improve the hatchery production of orange-spotted rabbitfish (Siganus guttatus), the present study evaluated the effects of iodine-supplementation of larval food (Artemia) on endogenous thyroid hormone ...