Preliminary trials of combined Artemia rearing and salt production in earthen salt ponds in the Philippines
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This paper describes trials at combining Artemia rearing with salt production during the dry season, in newly-constructed earthen salt ponds (reservoir, evaporation, concentration, and crystallization ponds, total area of 5,000 m2 at the Leganes, Iloilo Station of the SEAFDEC Aquaculture Department. Salt production by the solar method amounted to 250 sacks of slat over 30 days or an average of 8 sacks/day (1 sack = 50 kg). Two successful Artemia inoculations were undertaken in May and June 1979 respectively : in both cases the adult stage was reached after 1 week. The May population died off when the salinity was suddenly increased by salt addition. The June population gradually disappeared at the onset of the rainy season.
Primavera, J. H., Estenor, D., & Acosta, P. (1980). Preliminary trials of combined Artemia rearing and salt production in earthen salt ponds in the Philippines. In G. Persoone, P. Sorgeloos, O. Roels, & E. Jaspers (Eds.), The Brine Shrimp Artemia. Proceedings of the International Symposium on the brine shrimp Artemia salina, Corpus Christi, Texas, USA, August 20-23, 1979. (Vol. 3. Ecology, Culturing, Use in Aquaculture, pp. 207–214). Wetteren, Belgium: Universa Press.
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Conference paperIC Liao, JJ Guo & MS Su - In JR Arthur, CR Lavilla-Pitogo & RP Subasinghe (Eds.), Use of Chemicals in Aquaculture in Asia : Proceedings of the Meeting on the Use of Chemicals in Aquaculture in Asia 20-22 May 1996, Tigbauan, Iloilo, Philippines, 2000 - Aquaculture Department, Southeast Asian Fisheries Development CenterAquaculture in Taiwan has a history of more than three centuries. To satisfy consumer preferences, a wide variety of aquatic species, 71 in 1993, are being cultured in Taiwan. It is difficult to control diseases when many species are cultured and stocking densities are high. At present, it is important to manage the use and application of chemotherapeutants effectively. Many aquatic animal diseases fall under the category of potentially curable illnesses. These include diseases of bacterial, protozoan, fungal, and environmental etiologies. This paper summarizes the chemicals used in aquaculture, farm management practices, alternative disease prevention methods, national regulations, and the current research on chemical use for aquaculture in Taiwan.
Effect of dietary organic acid salts, potassium diformate and sodium diformate on the growth performance of male Nile tilapia Oreochromis niloticus MLA Cuvin-Aralar, C Luckstaedt, K Schroeder & KJ Kühlmann -
Bulletin of Fish Biology, 2011 - Verlag Natur & WissenschaftThe effect of two organic acid salts on the production performance of juvenile male Nile tilapia Oreochromis niloticus were studied in two separate experiments. In the first trial the fish (initial size: 7.84kg) were fed commercial feed supplemented with 0,3% potassium diformate (KDF) while in the second trial the fish (initial size: 16.48 kg) were fed diets supplemented with 0,3% sodium diformate (NDF). The control group for both trials used the same commercial fish feed with no supplementation. The feeding trials lasted for 74 and 78 days, respectively. Results showed that the supplementation of either KDF or NDF significantly improved growth and feed conversion of male Nile tilapia compared to the control group. The fish in the KDF treatment had a mean final weight of 51.4g and FCR of 1.81 compared to 45.4g and 1.97, respectively, for the control. Mean final weight and FCR of fish in the NDF treatment were 66.2g and 0.69, respectively, while those of the control were 58.7g and 0.77. The condition factor of the fish in both trials was not affected by treatment.
Sulfide-hemoglobin interactions in the sulfide-tolerant salt marsh resident, the California killifish Fundulus parvipinnis T Bagarinao & RD Vetter -
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 1992 - Springer-VerlagSulfide can potentially damage hemoglobin or be detoxified by hemoglobin. In the sulfide-tolerant California killifish neither seems to be the case at environmentally realistic (micromolar) and physiologically relevant (millimolar) sulfide concentrations. An 8-h exposure of killifish to 5 and 8 mmol sulfide · 1 -1 results in 50–100% mortality, but not due to sulfhemoglobin (where sulfide covalently binds to the porphyrin) nor ferric hemoglobin (Hb + ), both dysfunctional hemoglobin derivatives. Killifish hemoglobin converts to sulfhemoglobin in vitro only in the presence of 1–5 mmol sulfide · 1 -1 . The amount of sulfhemoglobin formed increases with time and heme concentration but decreases with pH. Hb + binds sulfide as ferric hemoglobin sulfide (Hb + S, an unstable complex where sulfide ligates to the iron), and also as sulfhemoglobin. Killifish blood does not catalyze the oxidation of 10–500 µmol sulfide · 1 -1 to any appreciable extent. Radiolabeled sulfide incubated with oxyhemoglobin or whole blood disappears at rates greater than in buffers, but only minimal amounts of thiosulfate and no sulfate nor sulfite are formed (elemental sulfur and bound sulfide not quantified). Sulfide disappearance rates increase linearly with initial sulfide concentration. Hb + does catalyze the oxidation of sulfide to thiosulfate in vitro. Similar experiments on another sulfide-tolerant species, the long-jawed mudsucker Gillichthys mirabilis , produced similar results.