Small‐Scale System for the Mass Production of Rotifers Using Algal Paste

Pfeiffer, Timothy J.; Ludwig, Gerald M.

doi:10.1577/a05-098.1

Cited by 15 publications

(8 citation statements)

References 23 publications

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“…The technology to raise hybrid striped bass from fry through the first 14-21 d posthatch (dph) in indoor tanks has been developed (Denson and Smith 1997;Ludwig 2006) as have tank systems for larval fish production of a wide variety of species, such as grouper (Serranidae) (Tucker 2005), snappers (Lutjanidae) (Watanabe et al 2005), lingcod Ophiodon elongates (Rust et al 2005), and hybrid striped bass (Ludwig 1994a(Ludwig , 2003(Ludwig , 2005(Ludwig , 2006. Indoor tank systems to culture rotifers as first-feed sources for tank production indoors have also been developed (Pfeiffer and Ludwig 2007).…”

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confidence: 99%

Comparative Cost Analysis of Hybrid Striped Bass Fingerling Production in Ponds and Tanks

2012

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Year-round production of hybrid striped bass (female white bass Morone chrysops × male striped bass M. saxatilis) fingerlings would allow food fish growers to sell their product throughout the year, which would improve the consistency of market supply and cash flow for the farm. However, pond production of fingerlings is seasonal and precludes year-round supply. Tank culture methods have been developed to produce hybrid striped bass fingerlings indoors throughout the year, but the associated costs have not been estimated or compared with pond production costs. Economic engineering techniques were used to estimate production costs for phase I hybrid striped bass fingerlings in ponds (0.4, 1.2, or 2.4 ha) and tanks (945, 2,457, or 5,670 L) for production scales of 50,000, 100,000, 250,000, 500,000, 1,000,000, or 2,000,000 fingerlings per year. The results demonstrated that there are economies of scale in terms of the volume of production and the size of the production unit. Overall, pond production per 1,000 fingerlings was substantially less expensive than tank production, even accounting for the increased number of annual production cycles in tanks. Production costs were sensitive to survival rates and can be reduced by 7-14% and 5-11% for each 5% improvement in survival in ponds and tanks, respectively. Substituting microcyst brine shrimp for rotifers Artemia spp. in the diet may have the potential to reduce the tank costs of producing hybrid striped bass depending on fingerling survival beyond 14 d posthatch. Additional research is needed to improve overall fingerling survival both during the early fry rearing stage and after training to dry feed.

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confidence: 99%

Comparative Cost Analysis of Hybrid Striped Bass Fingerling Production in Ponds and Tanks

2012

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“…Likewise, all other treatments with the exception of the preserved Nanno product were observed to support growth of the worms. The reasons for the poor performance resulting from the use of the preserved Nanno remains unclear as this product is successfully being used for the culture of rotifers and as a replacement for live algae used in greenwater larval culture systems and without any adverse affects (Sicuro et al 2006; Pfeiffer and Ludwig, 2007; Fairchild et al 2009). Fatty acid analysis revealed that preserved Nanno had a higher content of EPA but an overall similar spectrum of fatty acids as the live Nanno.…”

Section: Discussionmentioning

confidence: 99%

Growth and Survival of Juvenile Feather Duster Worms, Sabellastarte spectabilis, Fed Live and Preserved Algae

Tamaru¹,

Ako²,

Baker³

et al. 2011

J World Aquaculture Soc

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The use of live algae and preserved algal products was examined as to their utility in supporting growth and survival of the feather duster worm, Sabellastarte spectabilis. Hatchery‐reared 4‐mo‐old worms were provided the same cell densities of live T‐Iso, preserved T‐Iso, live Nannochlropsis sp., and preserved Nannochloropsis sp. over the course of 132 d. A group of worms placed in a water table that received a continuous flow of raw seawater served as controls. Live and preserved T‐Iso resulted in the highest survival (86.7 ± 6.2% and 78.3 ± 16.5%, respectively) compared to all the other treatments. Live T‐Iso fed worms resulted in significantly larger worms than all other treatments with the preserved T‐Iso treatment supporting similar growth to those being fed live Nannochloropsis sp. and exposed to raw seawater. The preserved Nannochloropsis sp. resulted in significantly lower survival and growth when compared to all the other treatments. Fatty acid profiles of the algal diets and worm carcasses obtained during the current investigation suggest that T‐Iso outperformed Nannochloropsis because of its higher energy or fatty acid content.

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“…Nannochloropsis spp. may also be used as cell reactors for the production of heterologous proteins (Chen et al 2008) and have long been used as a food source in aquaculture (Duerr et al 1998;Pfeiffer and Ludwig 2007;Patil et al 2007;Ferreira et al 2009).…”

Section: Practical Importancementioning

confidence: 99%

Eustigmatophyceae

Eliáš

Amaral

Fawley

et al. 2016

Handbook of the Protists

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Eustigmatophyceae (eustigmatophytes) are a distinct lineage of ochrophyte (stramenopile) algae with a relatively small number (~30) of described species, but with evidence for a substantial taxonomic diversity yet to be explored. Eustigmatophytes are all unicellular coccoid algae, usually spherical or ovoid, but sometimes with a more distinctive shape (e.g., stipitate, tetrahedral, or with branched projections). Most eustigmatophytes live in freshwater, but some are common in terrestrial habitats and one subgroup is mostly marine. Reproduction occurs primarily via autosporogenesis, but many members of this class form zoospores with an anterior mastigoneme-bearing flagellum and a (sometimes missing) posterior bare flagellum. Sexual reproduction has not been directly observed, but genomic evidence suggests its presence in some species. Eustigmatophytes are distinguished from other ochrophytes by a suite of cytological features (not all are necessarily present in all taxa): a pigmented lipidic body (reddish globule), a swelling at the base of the anterior flagellum associated with an extraplastidial stigma (eyespot), lamellate vesicles (with a putative reserve product), and plastids without a girdle lamella and lacking continuity with the nuclear envelope. Also characteristic is the lack of chlorophyll c and violaxanthin as the dominant xanthophyll. Because of their tendency to accumulate large amounts of lipids, including polyunsaturated fatty acids, eustigmatophytes are extensively used for biotechnology applications. The potential for commercial use has sparked a renewed interest in the basic biology of Eustigmatophyceae, including initiation of genome sequencing projects, although attention remains highly biased toward a single lineage comprising the genera Nannochloropsis and Microchloropsis.

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Small‐Scale System for the Mass Production of Rotifers Using Algal Paste

Cited by 15 publications

References 23 publications

Comparative Cost Analysis of Hybrid Striped Bass Fingerling Production in Ponds and Tanks

Comparative Cost Analysis of Hybrid Striped Bass Fingerling Production in Ponds and Tanks

Growth and Survival of Juvenile Feather Duster Worms, Sabellastarte spectabilis, Fed Live and Preserved Algae

Eustigmatophyceae

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