Water Quality and Microbial Dynamics in Shrimp Ponds Receiving Bagasse‐Based Feed

Visscher, Pieter T.; Duerr, Eirik O.

doi:10.1111/j.1749-7345.1991.tb00718.x

Cited by 16 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chlorophyll concentrations in our ponds were also comparable with those in other studies of shrimp ponds (e.g. Visscher & Duerr 1991;Briggs & Funge-Smith 1994;Burford 1997). Concentrations were higher in the second sampling period, but this is probably the result of short-term trends rather than a trend over the growth season.…”

Section: Discussionsupporting

confidence: 90%

“…Values for the physical parameters and nutrients for the two sampling periods early and late in the growth season were comparable with those in other studies of shrimp ponds (e.g. Visscher & Duerr 1991;Boyd & Fast 1992;Fast & Lannan 1992;Briggs & Funge-Smith 1994). Chlorophyll concentrations in our ponds were also comparable with those in other studies of shrimp ponds (e.g.…”

Section: Discussionsupporting

confidence: 90%

See 1 more Smart Citation

Short-term nitrogen uptake and regeneration in early and late growth phase shrimp ponds

Burford

Glibert

1999

Aquaculture Research

View full text Add to dashboard Cite

Phytoplankton uptake of nitrogen and regeneration by the natural biota were measured over two 24-h periods in three commercial shrimp ponds [Penaeus japonicus (Bate)] in subtropical Australia. Ponds were sampled on two occasions: early in the growth season when shrimp biomass was relatively low (1000 kg ha ±1 ); and late in the growth season when biomass was high (3000 kg ha ±1 ). Ammonium-N, urea-N and chlorophyll a concentrations were higher in the second sampling period (1.68 T 0.61 mM, 2.63 T 0.41 mM and 115.28 T 10.63 mg L ±1 respectively) than in the ®rst (0.36 T 0.07 mM, 0.40 T 0.12 mM and 23.61 T 1.44 mg L ±1 respectively). Rates of phytoplankton uptake of urea, ammonium and nitrate were also higher in the second sampling period (15.58 T 5.12, 1.90 T 0.37 and 1.02 T 0.19 mM h ±1 respectively) than in the ®rst (1.33 T 0.18, 0.69 T 0.04 and 0.06 T 0.004 mM h ±1 respectively), and there were no day±night differences in rates, with the exception of higher urea uptake during the day in the ®rst sampling period. The relative preference indices for urea and ammonium were higher than for nitrate during the ®rst sampling period, whereas all three sources were taken up in equal proportion in the second period. Most of the particulate nitrogen biomass and nitrogen uptake was in the < 10 mm fraction (only measured during the second sampling period). The bulk of this community was nano¯agellates. Urea was taken up more rapidly than the other nitrogen sources by both > 10 and < 10 mm fractions, but the uptake of nitrate was proportionately higher in the > 10 mm fraction. Ammonium and urea regeneration rates were higher in the second sampling period than in the ®rst (2.15 T 0.25 and 13.27 T 4.03 mM h ±1 , respectively, compared with 0.67 T 0.04 and 1.39 T 0.15 mM h ±1 ), and both ammonium and urea regeneration appeared to be coupled to phytoplankton uptake. Shrimp excretion of ammonium and urea was a minor contributor to regeneration (9% in the ®rst sampling period and 6% in the second). We hypothesize that microzooplankton and/or bacterial remineralization were the major contributors to the regeneration. The shrimp ponds were therefore characterized by rapid turnover of urea and inorganic nitrogen.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 90%

Short-term nitrogen uptake and regeneration in early and late growth phase shrimp ponds

Burford

Glibert

1999

Aquaculture Research

View full text Add to dashboard Cite

show abstract

“…Using the quantified minimum estimates of 38–91 mmoles‐C m −2 day −1 for bacterial C productivity (Figures 4–7 using mean pond depth of 0.7 m) and a cellular level productivity of 50 fg‐C cell −1 day −1 , it is estimated that sediment cell densities are order 10 8 –10 9 cell cm −3 (this calculation does not include a growth efficiency). This estimate of cell densities is consistent with other studies [ Torsvik et al , 1996; Visscher and Duerr , 1991].…”

Section: Discussionsupporting

confidence: 93%

Carbon and oxygen dynamics of shallow aquatic systems: Process vectors and bacterial productivity

Torgersen

Branco

2007

J. Geophys. Res.

View full text Add to dashboard Cite

[1] In shallow aquatic systems subject to heavy allochthonous (terrestrial) organic loading, bacterial processing of organic matter can be a significant component in the ecosystem C-cycle. Because this bacterial processing of organic matter also produces reduced species (Fe +2 , Mn +2, S À2 , NH 3 , etc.), these processes also create an additional chemical oxygen demand. Hence, net ecosystem operation can deviate significantly from the ''Redfield Line'' defined by the traditional photosynthesis/respiration reaction stoichiometry. Here, a 3D process vector concept is presented in terms of (gas-exchangecorrected) CO 2 or O 2 -TDIC-time to characterize significant bacterial contributions to the net O 2 and TDIC dynamics of the ecosystem. The direction of the process vector provides an important clue to the internal process dynamics and the biogeochemical pathways that govern the net ecosystem function. Using instrumented in situ measures of O 2 and TDIC in a small pond (ca. 0.7 m deep), this ecosystem is shown to operate significantly off the ''Redfield Line'' with multiple periods producing a net increase in both (gas-exchangecorrected) O 2 and CO 2 and exporting of both to the atmosphere. A methodology for the quantification of the minimum bacterially produced TDIC in the ecosystem (MBP) is developed. The rates (38-91 mmoles C m À2 day À1

show abstract

“…Additionally, the natural environment where L. vannamei is found is typically turbid with low visibility and high amounts of substrate (Visscher & Duerr, 1991), where no light of wavelength below 500 nm can penetrate. Thus, the perception and preference for yellow and red colours better match the light conditions present in natural environment, which may improve FI and growth in such places.…”

Section: Discussionmentioning

confidence: 99%

Effects of substrate colour preference on growth of the shrimp Litopenaeus vannamei (Boone, 1931) (Decapoda, Penaeoidea)

Freire

Luchiari

Marques

2012

Crustac

View full text Add to dashboard Cite

We tested the substrate colour preference and its effect on the specific growth rate (SGR), food intake and feeding efficiency (FE) of the shrimp Litopenaeus vannamei (Boone, 1931). Preference was tested in 50 cm diameter circular tanks divided into 4 lateral compartments, each filled with 2 cm depth of fine-grain, coloured sand (yellow, blue, green and red). The respective walls of each tank were also kept with the same colour, using coloured paper. Tanks were fiUed with 10 1 of water (salinity of 4) and illuminated with fluorescent light (n = 35). Tanks with natural sand (without a specific colour) were used as controls (n = 6). Thirty-five shrimps were observed individually for three days at 7, 10, 13 and 16 h, for 20 min each time. Visit frequency to each compartment was registered every 2 min. Shrimps did not show any preference for a specific colour substrate for the first two days, however, there was higher preference for the yellow and red substrates on the third day. Control shrimps did not show preference for any compartment. To test the effects of substrate colour on feeding rate and growth, 25 shrimps were isolated for 60 days in a 15-1 aquahum covered with coloured paper on the walls and filled with 2 cm of coloured substrate (yellow, blue, green, red and natural sand, n = 5 for each colour). Shrimps were fed daily and uneaten food removed and recorded. Shrimps were weighed every 10 days. Feeding rate was higher in the red environment than in blue or green environments, and ra was also higher for red than for blue shrimps group. SGR was higher in red and yellow environments. These results suggest that yellow and red substrate enhance the shrimps' visual perception and food detection, and thus supports the finding that these substrate colours can improve FE and SGR of cultivated shrimps. RESUMOTestamos a preferencia por coloraçâo do substrato e seus efeitos sobre a taxa de crescimento específico (SRG), ingestao alimentar e eficiencia alimentar (FE) do camarao Litopenaeus

show abstract

Water Quality and Microbial Dynamics in Shrimp Ponds Receiving Bagasse‐Based Feed

Cited by 16 publications

References 35 publications

Short-term nitrogen uptake and regeneration in early and late growth phase shrimp ponds

Short-term nitrogen uptake and regeneration in early and late growth phase shrimp ponds

Carbon and oxygen dynamics of shallow aquatic systems: Process vectors and bacterial productivity

Effects of substrate colour preference on growth of the shrimp Litopenaeus vannamei (Boone, 1931) (Decapoda, Penaeoidea)

Contact Info

Product

Resources

About