Studies on the effect of using the rotifer, <i>Brachionus plicatilis</i>
, treated with different nutritional enrichment media and antibiotics on the growth and survival of blue-fin sea bream, <i>Sparidentex hasta</i>
 (Valenciennes), larvae

Abu-Rezq, Tawfiq S.; Al-Abdul-Elah, K.; Duremdez, R; Al‐Marzouk, A; James, Charles M.; Al-Gharabally, H.; Al-Shimmari, Jaber

doi:10.1046/j.1365-2109.2002.00658.x

Cited by 15 publications

(12 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking into account that DHA levels in larvae fed prey enriched with MG were significantly higher than in those fed AG‐enriched prey, it can be suggested that DHA levels and DHA/EPA ratio influence final survival, something already observed in other species of marine fish larvae (Tocher ). In other species such as Gadus morhua (García et al ), Melanogrammus aeglefinus (García et al ), and Sparidentex until (Tawfiq Abu‐Rezq et al ), there does not seem to exist this relationship between the content of DHA in live prey and larvae and the final survival.…”

Section: Discussionmentioning

confidence: 99%

Effect of different enrichment products rich in docosahexaenoic acid on growth and survival of meagre, Argyrosomus regius (Asso, 1801)

Vallés¹,

Estévez²

2015

J World Aquaculture Soc

View full text Add to dashboard Cite

Live prey used in aquaculture to feed marine larval fish – rotifer and Artemia nauplii – lack the necessary levels of n‐3 polyunsaturated fatty acids (n‐3 PUFA) which are considered essential for the development of fish larvae. Due to the high voracity, visual feeding in conditions of relatively high luminosity, and cannibalism observed in meagre larvae, a study of its nutritional requirements is needed. In this study, the effect of different enrichment products with different docosahexaenoic acid (DHA) concentrations used to enrich rotifers and Artemia metanauplii have been tested on growth, survival, and lipid composition of the larvae of meagre. The larvae fed live prey enriched with Algamac 3050 (AG) showed a significantly higher growth than the rest of the groups at the end of the larval rearing, while the larvae fed preys enriched with Multigain (MG) had a higher survival rate. DHA levels in larvae fed prey enriched with MG were significantly higher than in those fed AG‐enriched prey. High levels of DHA in Artemia metanauplii must be used to achieve optimal growth and survival of meagre larvae.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of different enrichment products rich in docosahexaenoic acid on growth and survival of meagre, Argyrosomus regius (Asso, 1801)

Vallés¹,

Estévez²

2015

J World Aquaculture Soc

View full text Add to dashboard Cite

show abstract

“…In a previous study, no significant differences (p < 0.05) in the culturable counts of heterotrophic bacteria and Vibrio spp. between untreated and oxolinic-acid-treated rotifer cultures were observed, resulting in the conclusion that antibiotic-treated rotifers used to feed reared larvae of blue-fin seabream are not needed to improve larval survival [67]. By contrast, the bacterial loads on both rotifers and Artemia were reduced with antibiotics [10], but until now, effective bacterial reduction in mass-produced rotifers remains an unsolved issue.…”

Section: Discussionmentioning

confidence: 99%

Live Feeds Used in the Larval Culture of Red Cusk Eel, Genypterus chilensis, Carry High Levels of Antimicrobial-Resistant Bacteria and Antibiotic-Resistance Genes (ARGs)

Hurtado

Miranda

Rojas

et al. 2020

Animals

View full text Add to dashboard Cite

Simple Summary: The culture of the marine fish red cusk eel Genypterus chilensis is currently considered a priority for Chilean aquaculture but low larval survival rates have prompted the need for the continuous use of antibiotics, mainly florfenicol. In this study, the role of live prey (rotifers and the brine shrimp Artemia franciscana) used to feed fish larvae as a source of antibacterial-resistant bacteria in a commercial culture of G. chilensis was investigated. Samples of live feeds were collected during the larval growth period and their bacterial contents were determined. High levels of potentially opportunistic pathogens, such as Vibrio spp., as well as florfenicol-resistant bacteria, were detected. Sixty-five florfenicol-resistant isolates were recovered from these cultures and identified as Vibrio (81.5%) and Pseudoalteromonas (15.4%), which exhibited a high incidence of co-resistance to the antibiotics streptomycin, oxytetracycline, co-trimoxazole, and kanamycin. The majority of them carried the florfenicol-resistance encoding genes floR and fexA. The high prevalence of antibiotic-resistant bacteria and the associated genetic elements in live feed administered to reared fish larvae requires the prompt implementation of efficient management strategies to prevent future therapy failures in fish larval cultures and the spread of antibiotic-resistant bacteria to associated aquatic environments. Abstract:The culture of red cusk eel Genypterus chilensis is currently considered a priority for Chilean aquaculture but low larval survival rates have prompted the need for the continuous use of antibacterials. The main aim of this study was to evaluate the role of live feed as a source of antibacterial-resistant bacteria in a commercial culture of G. chilensis. Samples of rotifer and Artemia cultures used as live feed were collected during the larval growth period and culturable bacterial counts were performed using a spread plate method. Rotifer and Artemia cultures exhibited high levels of resistant bacteria (8.03 × 10 4 to 1.79 × 10 7 CFU/g and 1.47 × 10 6 to 3.50 × 10 8 CFU/g, respectively). Sixty-five florfenicol-resistant isolates were identified as Vibrio (81.5%) and Pseudoalteromonas (15.4%) using 16S rRNA gene sequence analysis. A high incidence of resistance to streptomycin (93.8%), oxytetracycline (89.2%), co-trimoxazole (84.6%), and kanamycin (73.8%) was exhibited by resistant isolates. A high proportion of isolates (76.9%) carried the florfenicol-resistance encoding genes floR and fexA, as well as plasmid DNA (75.0%).Animals 2020, 10, 505 2 of 23 microbiota in reared fish larvae, thus proper monitoring and management strategies for live feed cultures appear to be a priority for preventing future therapy failures in fish larval cultures.

show abstract

“…The requirements of common dentex larvae for dietary EPA are close to those found in fish larvae from temperate water, such as Pseudocaranx dentex (>3.1%; Takeuchi et al, ) and Limanda ferruginea (3.5%; Copeman et al, ). Common dentex EPA requirements were higher than those of the temperate species Paralichthys olivaceus (1%; Furuita et al, ) and lower than that of the warm water species Sparidentex hasta (19.3%; Abu‐Rezq et al, ).…”

Section: Resultsmentioning

confidence: 98%

Effects of dietary arachidonic and eicosapentaenoic acids on common dentex (Dentex dentex Linnaeus 1758) larval performance

Papiol

Estévez

2019

J World Aquaculture Soc

View full text Add to dashboard Cite

Oily emulsions containing constant levels of total fatty acids (FAs) and varying eicosapentaenoic acid (EPA) and arachidonic acid (ARA) levels were used to enrich rotifers. Common dentex larval survival and growth were compared between groups fed different enriched live prey. Growth, survival rate, and lipid composition of larvae suggest that feeding common dentex in the first 15 days posthatching with 2.5–3% EPA, 6–8% docosahexaenoic acid (DHA), and DHA/EPA ratio of 2.0–2.5 is sufficient to fulfill their EPA requirements. Higher amounts of dietary EPA did not result in any significant improvement in growth or survival. EPA requirement during this period of larval development does not seem to be as critical as other FAs during the first 15 days of common dentex larval development, but it does not exclude its essentiality later in development. In the case of ARA, nutritional requirements are low compared to other marine finfish species, with the upper limit of this essential FA being around 2% of total FAs provided in the live prey composition.

show abstract

Studies on the effect of using the rotifer, Brachionus plicatilis , treated with different nutritional enrichment media and antibiotics on the growth and survival of blue-fin sea bream, Sparidentex hasta (Valenciennes), larvae

Cited by 15 publications

References 33 publications

Effect of different enrichment products rich in docosahexaenoic acid on growth and survival of meagre, Argyrosomus regius (Asso, 1801)

Effect of different enrichment products rich in docosahexaenoic acid on growth and survival of meagre, Argyrosomus regius (Asso, 1801)

Live Feeds Used in the Larval Culture of Red Cusk Eel, Genypterus chilensis, Carry High Levels of Antimicrobial-Resistant Bacteria and Antibiotic-Resistance Genes (ARGs)

Effects of dietary arachidonic and eicosapentaenoic acids on common dentex (Dentex dentex Linnaeus 1758) larval performance

Contact Info

Product

Resources

About