Now showing items 1-7 of 7

    • Article

      Effect of delayed feeding of Artemia salina and partial replacement by Moina macrocopa on growth and survival of sea bass, Lates calcarifer (Bloch), larvae. 

      ES Ganzon-Naret & AC Fermin - The Israeli Journal of Aquaculture-Bamidgeh, 1994 - Society of Israeli Aquaculture and Marine Biotechnology
      One-day old sea bass larvae (0.93-2.03 mm total length, 0.94-1.00 mg wet body weight) were stocked at a density of 30 larvae per liter in nine 250 l capacity fiberglass tanks. Fish were reared for 26 days on three different feeding regimes using Brachionus plicatiilis, Artemia salina and Moina macrocopa as live foods. Delaying feeding of Artemia nauplii until day 15 resulted in slower larvae growth rates compared with fish fed Artemia starting on day 10. Partial replacement of Artemia nauplii by Moina starting on day 17 showed a marked increase in larval growth over the delayed Artemia treatment. Percent survival of larvae amongst all three treatments did not vary significantly.
    • Article

      Effect of Epinephelus coioides, Chanos chanos, and GIFT tilapia in polyculture with Penaeus monodon on the growth of the luminous bacteria Vibrio harveyi 

      EA Tendencia, AC Fermin, MR dela Peña & CH Choresca Jr. - Aquaculture, 2006 - Elsevier
      Studies have shown that the presence of Tilapia hornorum hybrid has antibacterial effect against luminous bacteria. The present study aims to determine the effect of different fish species such as grouper, milkfish and tilapia in polyculture with shrimp on the growth of luminous bacteria. Results showed that stocking of tilapia Oreochromis niloticus hybrid and grouper Epinephelus coioides at a biomass of 500 g/m3 efficiently inhibited the growth of luminous bacteria in shrimp (biomass = 80 g/m3) rearing water and positively affected shrimp survival. Results also showed that the presence of milkfish Chanos chanos at a biomass of 500 g/m3 did not inhibit the growth of luminous bacteria in shrimp (biomass = 80 g/m3) rearing water.
    • Article

      Effects of alternate starvation and refeeding cycles on food consumption and compensatory growth of abalone, Haliotis asinina (Linnaeus). 

      AC Fermin - Aquaculture Research, 2002 - Blackwell Publishing
      The effects of alternate starvation and refeeding on food consumption and compensatory growth of hatchery-bred abalone, Haliotis asinina (Linnaeus), were determined. Two groups of abalone juveniles (mean shell length = 29 mm, body weight = 5 g) were alternately starved and refed a macro-alga, Gracilariopsis bailinae at equal duration (5/5 or 10/10) over 140 days. A control group (FR) was fed the seaweed ad libitum throughout a 200-day experimental period. Starved and refed abalone showed slower growth rates (DGR, 63 and 70 mg/day in the 5/5 and 10/10 groups respectively), as a result of reduced food intake (DFI 15% and 16% day−1 respectively), after repeated starvation and refeeding cycles. Percentage weight gains (5/5 = 196%, 10/10 = 177%) were significantly lower than that of the control (397%). When refed continuously over 60 days, the starved groups exhibited increased DFI and fed at the rate of 24% and 25% day−1, which were not significantly different from that of the control at 26% day−1. At the end of the experiment, no significant differences were observed among three treatments in terms of shell length (range: 46–48 mm), body weight (range 25–28 g), % weight gain (392–465%) and per cent survival (range 87–98%). The results indicated that H. asinina had a complete compensatory growth following a return to full rations after a series of intermittent starvation and refeeding cycles.
    • Article

      Feeding, growth and survival of abalone (Haliotis asinina Linnaeus 1758) reared at different stocking densities in suspended mesh cages in flow-through tanks 

      AC Fermin & SM Buen - The Philippine Scientist, 2000 - San Carlos Publications, University of San Carlos
      Feeding, growth and survival of hatchery-bred juvenile abalone, Haliotis asinina (mean initial shell lengths: 32 mm) stocked at 25, 50 and 100 m-2 of shelter surface area in mesh cages suspended in indoor tanks were determined. Animals were fed the seaweed, Gracilariopsis bailinae, to excess given at weekly intervals. After 250 d, avereage daily growth rate (mean: 122 µm d-1 shell length, 156 mg d-1 body weight) was highest in abalone reared at the lowest stocking density (25 m-2 ). Abalone stocked at 50 and 100 m-2 had similar growth rates that ranged from 96 to 98 µm d-1 SL and 123 to 131 mg d-1 BW). Daily feeding rates of 29 and 30% were not significantly different for abalone stocked at 25 and 50 m-2, respectively, but were higher than abalone stocked at 100 m-2. The higher feeding rates of 24-28% day-1 of abalone in all treatments starting day-129 until day-160 could be due to the onset of sexual maturation as most abalone are already mature at this size. Survival rates were generally high (91-98%) and were not significantly different among treatments. However, body size (range: 59.3 mm SL, 57-58.4 g BW) at harvest was bigger in animal stocked at 25 m-2 than those stocked at 100 m-2. Sexual maturation during culture did not hamper growth of abalone. G. bailinae proved to be a sufficient food source for abalone grow-out. A stocking density between 50-100 m-2 is recommended for tank grow-out of H. asinina.
    • Article

      Partial replacement of Artemia sp. by the brackishwater cladoceran, Diaphanosoma celebensis (Stingelin), in the larval rearing of sea bass, Lates calcarifer (Bloch) 

      MR de la Peña, AC Fermin & DP Lojera - The Israeli Journal of Aquaculture-Bamidgeh, 1998 - Society of Israeli Aquaculture and Marine Biotechnology
      A feed experiment was conducted to test the brackishwater cladoceran, Diaphanosoma celebensis, as a partial or complete substitute for Artemia in the larval rearing of the sea bass, Lates calcarifer. The cladoceran was fed either alone or in combination with Artemia to 15-day old sea bass larvae (5.6 mm SL, 2.7 mg wet BW) reared at 15 ppt salinity. Groups fed Artemia alone were reared at 15 and 32 ppt salinity levels. After 15 days of rearing, the survival (95-99%), observed mortality (0.8-1.2%) and apparent loss due to cannibalism (0.2-4.1%) did not differ significantly among treatments. The specific growth rates of fish fed only Artemia (18.7-19.1%/day) and combined Artemia+Diaphanosoma (18.7%/day) were significantly higher than that of fish fed only Diaphanosoma (16.3%/day). Diaphanosoma had higher crude protein and crude fat contents than Artemia but the percentage of n-3 highly unsaturated fatty acids, particularly 20:5n3 and 22:6n3, was lower than in Artermia. Results indicated the potential of Diaphanosoma as a partial substitute for Artemia in the larval rearing of sea bass at 15 ppt salinity.
    • Book

      Sea bass hatchery operations. 

      MM Parazo, LMB Garcia, FG Ayson, AC Fermin, JME Almendras, DM Reyes Jr., EM Avila & JD Toledo - 1998 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 18
      The manual addresses sea bass (Lates calcarifer) fry production in the hatchery. It describes the principles and practical procedures for rearing sea bass - from eggs until metamorphosis - as practiced by the SEAFDEC Aquaculture Department in Tigbauan, Iloilo, Philippines. It is presented under the following main section headings: General principles; biology; Selecting a suitable site; Design - tank systems, seawater supply system, freshwater supply system, aeration system, other facilities; Broodstock - source of breeders, breeding techniques; Egg collection, transport and hatching; Larval rearing - stocking density, feed types and feeding management, water management size-grading of larvae; Harvest and transport of fry; and, Propagation of larval food - Chorella, Brachionus, Artemia, Moina.
    • Article

      Terrestrial leaf meals or freshwater aquatic fern as potential feed ingredients for farmed abalone Haliotis asinina (Linnaeus 1758) 

      OS Reyes & AC Fermin - Aquaculture Research, 2003 - Blackwell Publishing
      Three terrestrial leaf meals, Carica papaya, Leucaena leucocephala, Moringa oliefera and a freshwater aquatic fern, Azolla pinnata were evaluated as potential ingredients for farmed abalone diet. All diets were formulated to contain 27% crude protein, 13% of which was contributed by the various leaf meals. Fresh seaweed Gracilariopsis bailinae served as the control feed. Juvenile Haliotis asinina (mean body weight=13.4±1.6 g, mean shell length= 38.8±1.4 mm) were fed the diets at 2–3% of the body weight day–1. Seaweed was given at 30% of body weight day–1. After 120 days of feeding, abalone fed M. oliefera, A. pinnata-based diets, and fresh G. bailinae had significantly higher (P<0.01) specific growth rates (SGR%) than abalone fed the L. leucocephala-based diet. Abalone fed the M. oliefera-based diet had a better growth rate in terms of shell length (P<0.05) compared with those fed the L. leucocephala-based diet but not with those in other treatments. Furthermore, protein productive value (PPV) of H. asinina was significantly higher when fed the M. oliefera-based diet compared with all other treatments (P<0.002). Survival was generally high (80–100%) with no significant differences among treatments. Abalone fed the M. oliefera-based diet showed significantly higher carcass protein (70% dry weight) and lipid (5%) than the other treatments. Moringa oliefera leaf meal and freshwater aquatic fern (A. pinnata) are promising alternative feed ingredients for practical diet for farmed abalone as these are locally available year-round in the Philippines.