Stocking density in the larviculture of Nile tilapia in saline water

Luz, Ronald Kennedy; Silva, Walisson de Souza e; Filho, Reinaldo Melillo; Santos, André Eduardo Heringer; Rodrigues, Lucas; Takata, Rodrigo; Alvarenga, Érika Ramos de; Turra, Eduardo Maldonado

doi:10.1590/s1516-35982012001200001

Cited by 16 publications

(13 citation statements)

References 32 publications

(36 reference statements)

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“…Both TAN and turbidity increased during Phase 2 in the 190 m 3 → 103 m 3 tanks as the density increased, as also found by, e.g. Luz, Silva, Melillo, Santos, Rodrigues, Takata, de Alvarenga and Turra (). Despite the significant differences in pH, CO 2 , turbidity and TAN in the 190 m 3 → 103 m 3 tanks, the growth rate in this group was still highest.…”

Section: Discussionsupporting

confidence: 80%

Tank size and fish management history matters in experimental design

et al. 2016

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To investigate the questions: (1) does tank size affect fish performance; (2) does tank size prior to an experiment affect later fish performance and (3) how does performance in experimental tanks compare with rearing in industry-scale cages, Atlantic salmon smolts were acclimatized to 190, 3 or 0.9 m 3 tanks (Phase 1; 1.5 months) before redistributed to Phase 2 for 5 months. Question 1: fish in 190 m 3 tank were redistributed to 0.9 m 3 (190 m 3 ? 0.9 m 3 ), 3 m 3 (190 m 3 ? 3 m 3 ), or 103 m 3 (190 m 3 ? 103 m 3 ) tanks. Question 2: fish in 0.9 m 3 tanks were redistributed to 3 m 3 tanks (0.9 m 3 ? 3 m 3 ), and compared to fish from 190 m 3 tank (190 m 3 ? 3 m 3 ). Question 3: fish were placed directly in 3 m 3 tanks, not moved (3 m 3 ? 3 m 3 ), and compared to reference sea cages. Phase 2 mortality: 190 m 3 ? 0.9 m 3 (46%), 190 m 3 ? 3 m 3 (29%), 190 m 3 ? 103 m 3 (19%), 3 m 3 ? 3 m 3 and 0.9 m 3 ? 3 m 3 (<5%). Most mortality happened shortly after transfer. Our study suggests tank size dependent performance, based on growth and feed intake that increased with tank size. 190 m 3 ? 103 m 3 fish were more active than 190 m 3 ? 0.9 m 3 and 190 m 3 ? 3 m 3 fish. 190 m 3 ? 103 m 3 tanks had lowest relative variance. Previous tank scale history affected survival, since 0.9 m 3 ? 3 m 3 fish showed higher survival than 190 m 3 ? 3 m 3 fish. However, previous scale history did not affect growth rate, feed intake or somatic indexes. Fish performance in 3 m 3 ? 3 m 3 tanks did not differ from the reference sea cages. However, fish in 103 m 3 tanks performed better than reference cages, suggesting potential for improved commercial production. This study demonstrates that management practices can influence fish performance and should be taken into account when designing experiments.

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Section: Discussionsupporting

confidence: 80%

Tank size and fish management history matters in experimental design

et al. 2016

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“…The rearing of B. splendens larvae in low-salinity conditions resulted in better or similar growth and survival rates compared to freshwater rearing conditions, as previously observed for other stenohaline species (BORODE et al, 2002;SANTOS and LUZ, 2009;LUZ et al, 2012;JOMORI et al, 2012;. For instance, the growth of Colossoma macropomum, Astronotus ocellatus, Brycon amazonicus and Leporinus macrocephalus larvae was positively affected when they were reared in low-salinity water (JOMORI et al, 2013).…”

Section: Discusionsupporting

confidence: 69%

“…The use of sodium chloride (NaCl) in water has proved to be an important rearing protocol during the production of larvae (SANTOS and LUZ, 2009;LUZ and SANTOS, 2010;LUZ et al, 2012;JOM ORI et al, 2012;JOMORI et al, 2013) and juveniles (ZUANON et al, 2009;SALARO et al, 2012) of freshwater fish species. In literature, tolerance of Betta splendens to salinity was been reported by ZUANON et al (2009) and PUELLO-CRUZ et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Larvicultura do betta em água levemente salinizada

et al. 2017

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The low-salinity water may improve live food utilization during larviculture, mainly when larvae are fed with salt water organisms. This study aimed to determine the median lethal concentration (LC 50 ) of NaCl in water for larvae of Betta splendens, an important ornamental species, and to evaluate the effect of low-salinity on the larviculture during the first 15 days of exogenous feeding. In the first experiment, 400 larvae were stocked in forty 250 mL aquariums, and exposed to ten saline concentrations. In the second experiment, 360 larvae were distributed in 24 1 L aquariums, in a factorial design 2x3 comprising two increasing prey densities, starting with 50 and 100 Artemia nauplii larva -1 , and three concentrations of NaCl (0, 2 and 4 g NaCl L -1 ). After 24, 48, 72 and 96 h of exposure, the LC 50 were 11.7, 10.1, 8.2 and 7.1 g NaCl L -1 , respectively. At the end of the experiment 2, larvae reared in salinity of 2 and 4 g NaCl L -1 and fed with the initial prey density of 100 nauplii larvae -1 were bigger and heavier. The use of low-saline water (2 to 4 g NaCl L -1 ) is a safe protocol for larviculture of Siamese fighting fish as it does not affect the survival and optimizes the use of Artemia nauplii when higher prey densities are used.

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“…In the second experiment, there was a reduction in the water quality due to the high stocking density. This was reflected in the largest dissolved oxygen consumption and the increase in nitrogen compounds produced by the fish (Abe et al, ; Abe et al, ; Luz et al., ; Santos et al, ). In addition to the reduction in water quality, there was also a reduction in the productivity performance as stocking density increased.…”

Section: Discussionmentioning

confidence: 99%

Growth of Amazon ornamental fish Nannostomus beckfordi larvae (Steindachner, 1876) submitted to different stocking densities and feeding management in captivity conditions

et al. 2019

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The study evaluated productive performance of larvae Nannostomus beckfordi submitted to feeding management (Experiment one) and different stock density (Experiment two) in captivity conditions. The first experiment evaluated feeding rate (100 and 200 nauplii of artemia larvae −1 day −1 ) and feeding frequency (2 and 4× per day). Second experiment evaluated different stock density (1, 5, 10, 20, 40 larvae per litre). At the end of 15 days, for both experiment, the survival and productive performance such as total length (TL), final weight (FW), specific development rate (SDR), specific growth rate (SGR), uniformity for weight (UW) uniformity for length (UL) and relative condition factor (Kr) was determined. For the main results, there is no significant difference to the rate and feeding frequency. The stock density has no significant difference for UW, Kr and survival. Nonetheless, a reduction in the TL, FW, SDR, SGR and FW with the increase in density (20 for 40 larvae per litre) was observed. Thus, for this species Nannostomus beckfordi during to initial stage using exogenous feeding, it is recommended 20 larvae per litre fed with 100 nauplii per larvae having two meals per day.

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Stocking density in the larviculture of Nile tilapia in saline water

Cited by 16 publications

References 32 publications

Tank size and fish management history matters in experimental design

Tank size and fish management history matters in experimental design

Larvicultura do betta em água levemente salinizada

Growth of Amazon ornamental fish Nannostomus beckfordi larvae (Steindachner, 1876) submitted to different stocking densities and feeding management in captivity conditions

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