Biological performance of Totoaba macdonaldi in response to dietary protein level

The effects of environmental salinity on the growth and physiology of totoaba Totoaba macdonaldi and shortfin corvina Cynoscion parvipinnis

“…Confirmatory long‐term trials, growing fishes up to market size, are warranted. In this respect, the G S recorded at a salinity of 10 for C. parvipinnis (1·9 ± 0·1% day −1 ) and especially for T. macdonaldi (2·3 ± 0·1% day −1 ), places them as attractive aquaculture candidates, considering the range of G S values reported (from 0·7 to 2·5% day −1 ) for some juvenile and sub adult sciaenids, such as S. ocellatus, A. japonicus , Sciaena umbra L. 1758, Cynoscion othonopterus Jordan & Gilbert 1882, U. cirrosa and T. macdonaldi (Sandifer et al ., ; Jirsa et al ., ; Segato et al ., ; Chatzifotis et al ., ; Rueda‐López et al ., ; Minjarez‐Osorio et al ., ; Perez‐Velazquez et al ., ). Furthermore, improved growth rates of C. parvipinnis and T. macdonaldi might be expected when using adequate infrastructure for commercial culture, e.g ., floating cages with ample open space and high‐quality feeds.…”

“…In contrast, I VS of C. parvipinnis , as well as I HS and I VS of T. macdonaldi were equivocal. Likewise, in previous studies of C. parvipinnis or T. macdonaldi , measurements of K and I VS did not follow clear patterns in comparative feeding trials (Minjarez‐Osorio et al ., , ). It is worthwhile pointing out that, although rearing the two species together was advantageous for comparative purposes, sharing the same environment may have influenced, to some extent, their salinity tolerance.…”

“…As far as values of physico‐chemical variables of culture water are concerned, the values reported herein for temperature, dissolved oxygen, pH and the concentration of ammonia and nitrite, are similar to values in which good growth responses have previously been reported for the related sciaenid red drum (Davis, ; Wurts & Stickney, ; Tomasso & Kempton, ) or for the two species under study (Minjarez‐Osorio et al ., , ). Therefore, it is considered that the present study was conducted under adequate water quality conditions.…”

“…Recent efforts have primarily focused on stock enhancement, but also on aquaculture, with some success in the production of fry. T. macdonaldi can grow relatively rapidly in captivity (Minjarez‐Osorio et al ., ) and, given its highly appreciated flesh quality, it has captured the attention of aquaculturists and scientists.…”

Differential growth performance, intestinal antioxidant status and relative expression of Nrf2 and its target genes in young grass carp (Ctenopharyngodon idella) fed with graded levels of leucine

“…Balanced amino acids in diet resulted in high amino acid retention, and ultimately improved fish growth in Senegalese sole (Solea senegalensis) (Aragão et al, 2004). In teleosts, ammonia, as main nitrogenous metabolite of protein or amino acid degradation, is generally used as indicator of amino acid balance in diet (Minjarez-Osorio et al, 2012;Yang et al, 2012). It has been reported that lower plasma ammonia level in rainbow trout might be result of more balanced amino acid profile in diets (Fournier et al, 2003).…”