Size-related feeding and gastric evacuation measurements for the Southern brown shrimp Penaeus subtilis

Nunes, Alberto Jorge Pinto; Parsons, G. J.

doi:10.1016/s0044-8486(99)00386-5

Cited by 65 publications

(39 citation statements)

References 28 publications

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“…The estimated value of CB (−0.11), one of the parameters used to define allometric consumption, was consistent with the assumption that weight-specific consumption would decrease as size increased (i.e. the sign was negative) and was similar in magnitude to, but smaller than, estimates of CB for Penaeus subtilis (−0.38;Nunes & Parsons 2000) and Farfantepenaeus paulensis (−0.29; Soares et al 2005). It is difficult to compare the parameter p with literature values, as it is a composite of 4 separate parameters (s, e, u and ρ) for which there is little information available.…”

Section: Discussionsupporting

confidence: 75%

Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Adamack

Stow²,

Mason³

et al. 2012

Mar. Ecol. Prog. Ser.

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Section: Discussionsupporting

confidence: 75%

Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Adamack

Stow²,

Mason³

et al. 2012

Mar. Ecol. Prog. Ser.

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“…One hour after feed delivery, the feeding trays were removed, the uneaten feed was discarded, and the tank bottom was cleaned. This was followed by two consecutive fecal collections, 1.25 and 2.15 h after feed delivery at 07.00 h, and 13.00 h. This interval is sufficient to allow the gastric evacuation of more than half of a meal ingested by shrimp (Nunes and Parsons, 2000).…”

Section: Methodsmentioning

confidence: 99%

Bioavailability of crude protein and lipid from biofloc meals produced in an activated sludge system for white shrimp, Litopenaeus vannamei

2015

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-The present study compared the bioavailability of crude protein and lipid from biofloc meals generated with an activated sludge system using two water sources: wastewater from shrimp experimental culture (BFL-W) and, artificially, using clean seawater (BFL-C). The sludge system operated by chemical and organic fertilization three times per week. Sampling of bioflocs occurred every two days during 81 days. To evaluate digestibility, each type of biofloc meal was incorporated into a reference diet (REF) at 300 g/kg. Another diet acted as a negative control (NEG) by using fish waste meal. The apparent digestibility of bioflocs was estimated by the indirect method using chromic oxide (Cr 2 O 3 ) as the inert marker at 10 g/kg of the diet. Juvenile L. vannamei of 5.09±0.79 g (n = 440) were stocked at 10 shrimp/tank in 44 tanks of 61 L each that operated under a water recirculating regime. Biofloc meals contained a high ash content (591.0-649.2 g/kg) combined with a low crude protein content (95.9-137.3 g/kg). After 26 days, shrimp achieved a final survival of 93.2±0.8% and a biomass gain of 37.1±1.8 g/tank. Final shrimp body weight ranged from 9.01±0.15 to 9.45±0.13 g. The apparent digestibility coefficient (ADC) of crude protein in the biofloc produced from BFL-W, BFL-C and fish waste meal (NEG) reached 26.0, 25.7, and 64.1%, respectively. Similarly, the lipid ADC was 78.9, 67.9, and 85.8%, respectively. This study indicated that biofloc meals had a low protein availability for L. vannamei. However, although low levels of lipid were present, it proved to be available for the species. The dietary inclusion of biofloc meal appears to have a growth-promoting effect on shrimp, which may be associated with trace minerals, or other nutrients not identified in this study.

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“…Methods and experimental design used in the pond feeding trials were analogous to those in the creek feeding trials. The use of a starvation period prior to feeding is common practice with shrimp (Feller 1998, Nunes & Parsons 2000b, Stephen 2001, and it would have been advantageous to starve the field shrimp as in the laboratory feeding trials; however, this was not possible. We intended for field and laboratory starvation methods to be similar, but the pond managers requested minimal handling, and thus we were unable to conduct a starvation period with the field shrimp.…”

Section: Methodsmentioning

confidence: 99%

“…Although our study did not measure the time needed for complete evacuation of a meal from the gut, based on our values for GPT, we believe it is reasonable to assume that gut evacuation was complete in about double the mean GPT values for each species (about 3 h for Farfantepenaeus aztecus, slightly less time for Litopenaeus vannamei) (Beseres et al 2005). Nunes & Parsons (2000b) reported that, for Penaeus subtilis, foregut evacuation was nearly compete in 2 h after feeding, and Cockcroft & McLachlan (1986) measured complete evacuation of the foregut in 2 to 4 h for the penaeid Macropetasma africanus. Similar gut clearance times have been reported for P. monodon, P. esculentus, P. stylirostris, P. californiensis, P. vannamei (Dall et al 1990), and P. semisulcatus (Heales et al 1996).…”

Section: Gut Passage Timesmentioning

confidence: 99%

Practical equivalence of laboratory and field measurements of gut passage time in two penaeid shrimp species

Beseres

Lawrence²,

Feller³

2006

Mar. Ecol. Prog. Ser.

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Gut passage times (GPTs) of 2 species of juvenile penaeid shrimp Farfantepenaeus aztecus (Pèrez Farfante & Kensley, 1997) and Litopenaeus vannamei (Pèrez Farfante & Kensley, 1997) were measured in field and laboratory feeding trials using soy-based feeds varying in percent dry weight of either fiber (2.3 to 11.3%), protein (20.1 to 45%), or lipid (3.5 to 13.5%). To trace feed movement visually through the gut, feeds were thoroughly mixed with inert fluorescent latex beads. Because it was not possible to continuously view feed passage through the shrimp guts in the field trials (as is possible in the laboratory), we developed indirect methods that allowed us to obtain periodic 'snapshots' of feed movement through shrimp guts at 10 min intervals, which were then compared with direct observations of feed movement used in the laboratory trials and used to calculate GPT and gut passage rate. Indirect methods underestimated GPTs in field feeding trials, necessitating their adjustment before comparison with the directly measured laboratory GPTs. Overall, mean GPTs for L. vannamei fed 13 different fiber, protein, and lipid feeds were not significantly different between laboratory and field feeding trials. In general, mean laboratory GPTs for L. vannamei were slightly shorter than mean GPTs from field feeding trials (1 to 20 min). Utilizing only 1 feed (base feed: 30.1% protein, 5.3% fiber, 7.5% lipid), mean GPTs of F. aztecus in laboratory feeding trials were again slightly shorter (12 min) than mean field GPTs. We suggest that a temporal change in mean GPT of 1 to 20 min for shrimp fed the same feed in laboratory and field settings may be trivial enough to justify use of simpler laboratory measurements to extrapolate the GPTs of field populations for design of more efficient feeding regimes.

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Size-related feeding and gastric evacuation measurements for the Southern brown shrimp Penaeus subtilis

Cited by 65 publications

References 28 publications

Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Predicting the effects of freshwater diversions on juvenile brown shrimp growth and production: a Bayesian-based approach

Bioavailability of crude protein and lipid from biofloc meals produced in an activated sludge system for white shrimp, Litopenaeus vannamei

Practical equivalence of laboratory and field measurements of gut passage time in two penaeid shrimp species

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