Growth trials for polyculture of hatchery-reared juvenile spotted babylon (Babylonia areolata ) and sea bass (Lates calcarifer ) in a flow-through sea water system

2001 ◽  
Vol 32 (3) ◽  
pp. 247-250 ◽  
Author(s):  
N Chaitanawisuti ◽  
A Kritsanapuntu ◽  
S Kathinmai ◽  
Y Natsukari
Keyword(s):  
Sea Water ◽  
Water System ◽  
Sea Bass ◽  
Lates Calcarifer ◽  
Babylonia Areolata ◽  
Flow Through

scholarly journals APLIKASI MINYAK CENGKEH SEBAGAI OBAT BIUS PADA KAKAP PUTIH (Lates calcarifer Bloch)

2006 ◽  
Vol 8 (1) ◽  
pp. 9
Author(s):  
Bambang Hanggono
Keyword(s):  
Survival Rate ◽  
Potential Application ◽  
Sea Water ◽  
Sea Bass ◽  
Abnormal Behavior ◽  
Clove Oil ◽  
Lates Calcarifer ◽  
Plastic Bag ◽  
Slope Function ◽  
External Stimuli

The objective of this study was to determine the safety and efficacy of clove oil as an anesthetic in sea bass (Lates calcarifer) and the potential application of clove oil as anesthetic to facilitate the sea bass fry transportation. Acute toxicity test indicated the 24-hr LC50 value of clove oil in sea bass fry as 30 ppm with slope function of 1.079 (1.05 to 1.107). In efficacy test, fish were exposed to 5, 10, 15, 20 and 25 ppm of clove oil for 15 minutes. At 5 ppm, clove oil caused only sedation effect (partial loss of reaction to external stimuli) while at 20 ppm, fish entered anesthesia stage (failure to respond to external stimuli) within about 3 minutes. Fish recovered from a 15-min period of exposure in 20 ppm clove oil within less than 10 minutes following removal from the anesthetic solution. There was neither mortality nor abnormal behavior of fish during 15-min exposure of clove oil as well as during 7 days post recovery from anesthesia. The potential application of clove oil as an aid in the transport of sea bass fry in plastic bag was also investigated. At 5 ppm, clove oil could reduce activities of the fish without loss of equilibrium (sedation stage) during the 4 hour simulated transport at 50 fish per 1,000 ml sea water (15 ppt). At 20 ppm, clove oil caused loss of equilibrium in fish resulting in the anesthesia stage throughout the 4 hour period. However, there was no improvement on survival rate and fish behavior with the use of clove oil during and after this 4 hour transport. Simulated transport at 50 fish per 500 ml sea water (15 ppt) for 8 hour did show better significant survival rate with additional of 5 and 20 ppm clove oil. In both short and long term transport study, clove oil did show the benefit by reducing the fish activities judging from the reduction of oxygen consumption, ammonia and carbon dioxide levels. Addition of appropriate concentration of clove oil in transport water ensured that the fish would stay calm by reducing fish activity and therefore, prevented any drastic changes of water qualities.

Post-larval recruitment of blacklip abalone (Haliotis rubra) on artificial collectors in southern Tasmania

1995 ◽  
Vol 46 (3) ◽  
pp. 531 ◽  
Author(s):  
WJ Nash ◽  
JC Sanderson ◽  
J Bridley ◽  
S Dickson ◽  
B Hislop
Keyword(s):  
Sea Water ◽  
Larval Settlement ◽  
Water System ◽  
Early Spring ◽  
Larval Abundance ◽  
Second Phase ◽  
Larval Recruitment ◽  
Stage Process ◽  
Flow Through ◽  
Haliotis Rubra

Recruitment rates of blacklip abalone (Haliotis rubra) post-larvae were measured at fortnightly intervals for a year in southern Tasmania on larval collectors made of transparent, corrugated plastic. The settlement plates were conditioned prior to use in a flow-through sea-water system in a two-stage process. A film of diatoms (mainly Nitzschia and Navicula species) was first established on the plates, which were then grazed by juvenile H. rubra. This allowed second-phase algae (principally Myrionema species) to become established. The plates were then periodically deployed at a depth of ~7 m. Larval settlement occurred mainly during the austral winter and early spring. A peak settlement rate of 1408 post-larvae per collector (2347 post-larvae m-2) occurred in mid August. Methods of measuring larval or immediate post-larval abundance are reviewed with regard to their use in the assessment and management of abalone fisheries.

scholarly journals REARING OF JUVENILE DONKEY-EAR ABALONE (Haliotis asinina) IN FLOW-THROUGH TANKS WITH THE ADDITION OF DIFFERENT SUBSTRATES

2015 ◽  
Vol 40 (1) ◽  
pp. 17-22
Author(s):  
Dwi Eny Djoko Setyono
Keyword(s):  
Body Weight ◽  
Growth Rates ◽  
Shell Length ◽  
Sea Water ◽  
Survival Rates ◽  
Water System ◽  
Daily Growth ◽  
Coral Rubble ◽  
Haliotis Asinina ◽  
Flow Through

This study investigated the effects of the addition of coral rubble and polyvinylchloride (PVC) guttering as substrates on the growth of donkey-ear abalone (Haliotis asinina) reared in a flow-through water system. The tanks were100 cm long x 50 cm wide x 40 cm deep, filled with sea water up to 30 cm high. Hatchery-produced abalone with a mean initial shell length of 30.9 ± 0.1 mm and wet weight of 5.5 ± 0.1 g were stocked at 25 individuals/tankthat corresponded to stocking densities of ca. 50 abalone/m2 of the bottom area of the tank. Juvenile abalonewere provided with an excess red seaweed Gracilaria spp daily over 175 days. The results show that growth and growth rates in shell length and wet body weight were not significantly different between treatments (P>0.05). Survival rates of juveniles reared in the tank with the addition of coral rubble and/or PVC guttering were 100%, but 98% for juveniles in the tank without the addition of substrate. The average daily growth rates of shell length and wet body weight were 0.087+0.037 mm and 0.088+0.044 g for juveniles reared in the tank with the addition of coral rubble; 0.081+0.030 mm and 0.077+0.032 g for juveniles reared in the tank with the addition of PVC guttering; and 0.082+0.032 mm and 0.078+0.039 g for juveniles reared in tank without addition of substrates.

β-Defensin from the Asian Sea Bass, Lates calcarifer: Molecular Prediction and Phylogenetic Analysis

2021 ◽  
Author(s):  
Athira Raveendran ◽  
Dhanya Lenin K. L. ◽  
Anju M.V. ◽  
Neelima S. ◽  
Anooja V.V. ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Sea Bass ◽  
Lates Calcarifer ◽  
Asian Sea Bass

scholarly journals Dietary starch promotes hepatic lipogenesis in barramundi (Lates calcarifer)

2020 ◽  
Vol 124 (4) ◽  
pp. 363-373
Author(s):  
N. M. Wade ◽  
L. H. Trenkner ◽  
I. Viegas ◽  
L. C. Tavares ◽  
M. Palma ◽  
...  
Keyword(s):  
Mammalian Target Of Rapamycin ◽  
Sea Bass ◽  
Metabolic Effects ◽  
Lates Calcarifer ◽  
Glucose Levels ◽  
H Nmr ◽  
Expression Of Genes ◽  
Fractional Synthetic Rate ◽  
Dietary Starch

AbstractBarramundi (Lates calcarifer) are a highly valued aquaculture species, and, as obligate carnivores, they have a demonstrated preference for dietary protein over lipid or starch to fuel energetic growth demands. In order to investigate how carnivorous fish regulate nutritional cues, we examined the metabolic effects of feeding two isoenergetic diets that contained different proportions of digestible protein or starch energy. Fish fed a high proportion of dietary starch energy had a higher proportion of liver SFA, but showed no change in plasma glucose levels, and few changes in the expression of genes regulating key hepatic metabolic pathways. Decreased activation of the mammalian target of rapamycin growth signalling cascade was consistent with decreased growth performance values. The fractional synthetic rate (lipogenesis), measured by TAG 2H-enrichment using 2H NMR, was significantly higher in barramundi fed with the starch diet compared with the protein diet (0·6 (se 0·1) v. 0·4 (se 0·1) % per d, respectively). Hepatic TAG-bound glycerol synthetic rates were much higher than other closely related fish such as sea bass, but were not significantly different (starch, 2·8 (se 0·3) v. protein, 3·4 (se 0·3) % per d), highlighting the role of glycerol as a metabolic intermediary and high TAG-FA cycling in barramundi. Overall, dietary starch significantly increased hepatic TAG through increased lipogenesis. Compared with other fish, barramundi possess a unique mechanism to metabolise dietary carbohydrates and this knowledge may define ways to improve performance of advanced formulated feeds.

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