Dietary vitamin C improves the quality of yellowtail (Seriola quinqueradiata) seedlings

Tolerance to the air exposition test of Hoplias lacerdae larvae and juvenile during its initial development

“…The authors found a feeding treatment effect, since the larvae that received enriched nauplii presented greater survival on the stress resistance test, varying from 95.3 to 98.7%, while those that received non enriched nauplii diet presented Re of only 27%. However, in these two studies (Sakakura et al, 1998;Ako et al, 1994), the air exposition test was less drastic than the one done in the present study, where specimens of Hoplias lacerdae were also subjected to surface drying condition and loss of protection mucus due to the contact with the drying paper. In a previous experiment where the effect of water salinization was studied for initial rearing of trairao larvae fed with Artemia nauplii, 100% Re was found after 15 days of treatment, in all treatments (zero to 4‰ salinity) in a three-minute test in drying paper (Luz and Portella, 2002).…”

“…However, the animals were extremely resistant to the tests used in this study, indicating that larvae and juveniles of this species were not too sensitive to air exposition. The trairao specimens presented high Re values in comparison to those found in yellowtail, Seriola quinqueradiata, subjected to a study on vitamin C effect (Sakakura et al, 1998). These authors ran an air exposition test for four minutes, after 20 days of feeding, and observed survival during the subsequent two hours.…”

“…The correlation of resistance to stress due to various stressing factors has been used as a criterion to evaluate production quality and as a back up for the results of growth and survival (Tackaert et al, 1989). Several resistance stress tests have been utilized, e.g., exposure to air (Ako et al, 1994;Benfey and Biron, 2000;Fryer, 1975;Koven et al, 2001;Kraul et al, 1993;Luz and Portella, 2002;Martins, et al, 2000;Sakakura et al, 1998), responses to bacteria inoculation (Chair et al, 1994;Gatesoupe, 1995), and to high ammonia levels (Mazik et al, 1987). Trairao is considered a potential species for fish farming purposes (Neves, 1996) due its capacity of living in captivity (Andrade et al, 1998; and also for its accentuated rusticity (Gontijo, 1984).…”

Ascorbic acid and reproduction in fish: endocrine regulation and gamete quality

“…There is good evidence for ascorbate involvement in reproductive events in fish, although behavioural aspects are considered to be outside the scope of this review (Blom, Dabrowski, Rapp, Sakakura & Tsukamoto 1999; Sakakura, Koshio, Iida, Tsukamoto, Kida & Blom 1998).…”

Performance and stress resistance of Nile tilapias fed different crude protein levels

“…Resistance to stress tests may, along with these variables, be a support tool to evaluate the quality of larvae and fingerlings production (Dhert et al, 1992). Amongst the stress tests, air exposure is usually used for several species (Sakakura et al, 1998;Arends et al, 1999;Benfey & Biron, 2000;Martins et al, 2000;Koven et al, 2001;Van Anholt et al, 2004;Luz & Portella, 2005;Luz, 2007;Trushenski et al, 2010), and it is efficient for the evaluation of food quality on the stress resistance rate (Ako et al, 1994;Kanazawa, 1997;Luz, 2007). These tests may point to the effects of diet on the improvement of the health of the animals (Ako et al, 1994) and indicate the lot quality through the relationship between stress resistance, growth and survival results (Luz, 2007).…”