Rearing and estimation of life-cycle parameters of the tubicifid worm Branchiura sowerbyi: Application to ecotoxicity testing

Ducrot, Virginie; Péry, Alexandre R.R.; Quéau, H.; Mons, R.; Lafont, M.; Garric, Jeanne

doi:10.1016/j.scitotenv.2007.06.010

Cited by 24 publications

(29 citation statements)

References 21 publications

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“…The BSAF for PCB congeners (PCB 138, PCB 153, and PCB 156) in T. tubifex exposed to the spiked sediment was slowly increasing over nearly 1000 days. Tubificidae have a relatively long life span of more than 3 years, 38 therefore, a slow and steady uptake of octa-, nona-, and deca-BDEs can, similar to PCBs, last for several months if not for the whole of their life cycle.…”

Section: Discussionmentioning

confidence: 99%

Bioaccumulation of Polybrominated Diphenyl Ethers by Tubifex Tubifex

Kolar¹,

Arnuš²,

Križanec³

et al. 2016

ACSi

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The selective uptake of polybrominated diphenyl ethers (PBDEs) by oligochaetes makes it possible to assess the bioaccumulation of individual congeners in commercial mixtures. Twenty-one congeners from three BDE commercial mixtures (TBDE-71, TBDE-79 and TBDE-83R) and as individual congeners were tested on Tubifex tubifex in accordance with the OECD TG 315 "Bioaccumulation in Sediment-Dwelling Benthic Oligochaetes". All the congeners that were spiked in the sediment were detected at the end of the uptake phase and at the end of the experiment. The bioaccumulation factor (BAF), the kinetic bioaccumulation factor (BAF K ) and the biotasediment accumulation factor (BSAF) were calculated, and indicate a high bioaccumulation potential for tri-to hexaBDEs and a lower bioaccumulation potential for hepta-to deca-BDEs. The penta-homologues BDE-99 and BDE-100 showed the highest BSAFs of 4.84 and 5.85 (BAFs of 7.34 and 9.01), while the nona-and deca-BDEs exhibit bioaccumulation in up to one-order-lower concentrations. The change in the bioaccumulation potential between the group of trito hexa-BDEs and hepta-to deca-BDEs correlated with the generally accepted molecular-mass threshold for the molecular transition through biological membranes (700 g/mol).

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Section: Discussionmentioning

confidence: 99%

Bioaccumulation of Polybrominated Diphenyl Ethers by Tubifex Tubifex

Kolar¹,

Arnuš²,

Križanec³

et al. 2016

ACSi

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“…The conversion factor for that is: 1.47×10 7 joules energy production per kg COD oxidised or 3.86 kWh/kg COD (McCarty et al, 2011). Tetramin® fish food (Tetra, Germany) was used as a control diet as it was proven to be a suitable diet to support growth of Lv and other aquatic worms (Ducrot et al, 2007;Elissen et al, 2015).…”

Section: Experimental Designmentioning

confidence: 99%

The carbon to nitrogen ratio in isoenergetic wheat based diets controls the growth rate of the aquatic worm Lumbriculus variegatus

Laarhoven

Elissen

Buisman

et al. 2016

JIFF

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The aquatic worm Lumbriculus variegatus (Lv) contains high levels of proteins and can provide an excellent fish food. Large-scale production of Lv on low value organic substrates, such as by-products produced during wheat processing, therefore can be a promising and sustainable concept for the aquaculture industry. Growth and reproduction of Lv on different combinations of wheat based derivatives was studied at fixed isoenergetic levels (expressed by the chemical oxygen demand of the food), but at different carbon to nitrogen (C:N) mass ratios under controlled conditions in specifically designed test-beaker tests. Growth and reproduction rates were compared to those on Tetramin®, a substrate known to give excellent growth of Lv. Although Lv did exhibit a growth response on single as well as on mixed wheat fractions, growth was mainly controlled by the C:N ratio of the diets. Lower C:N ratios of typically 6-7 gave a much better performance than high C:N ratios of approximately 20. It was discussed this is probably caused by Lv relying on the presence of proteins for their carbon and energy source. Although growth and reproduction rates were not as high as on the control diet, the results are promising for the development of a worm biomass production system operating on by-products from the wheat processing industry.

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“…Dornfeld et al (2006), for instance, reported different densities throughout sampled parts of the Salto Grande reservoir (Americana, São Paulo, Brazil), ranging between 44 and 8711 ind.m -2 . When cultivated in laboratory conditions (25°C), this species exhibits low hatching rate: 34.4%- Marchese & Brinkhurst (1996), 31.0%- Ducrot et al (2007) and 44.93%- Nascimento & Alves (2008). However, the survival rate among juveniles is high and can reach 96% (Ducrot et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…When cultivated in laboratory conditions (25°C), this species exhibits low hatching rate: 34.4%- Marchese & Brinkhurst (1996), 31.0%- Ducrot et al (2007) and 44.93%- Nascimento & Alves (2008). However, the survival rate among juveniles is high and can reach 96% (Ducrot et al, 2007). Sexual maturity was reached in approximately 35 days, with an average daily growth of 0.58 mg.day -1 (Marchese & Brinkhurst 1996).…”

Section: Introductionmentioning

confidence: 99%

“…After becoming sexually mature, the organisms lay an average of 0.17 cocoons.day -1 (Ducrot et al 2007), during two yearly egg-laying cycles lasting approximately 20 weeks each (Ducrot et al 2007;Lobo & Alves 2011). Life expectancy for this species remains unclear but is estimated to lie between 18 (Aston 1968) and 36 months (Ducrot et al 2007). This uncertainty may be related to the difficulty of monitoring such organisms over a long period of time.…”

Section: Introductionmentioning

confidence: 99%

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<strong><em>Branchiura sowerbyi</em> Beddard, 1892 (Oligochaeta: Naididae) as a test species in ecotoxicology bioassays: a review</strong>

Lobo¹,

Espíndola²

2014

Zoosymposia

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Branchiura sowerbyi (Oligochaeta; Naididae; Rhyacodrilinae) is an oligochaete with great potential to be used as a testspecies in toxicology bioassays. Since 1950, its life cycle has been studied and nowadays it is well described in the literature. B. sowerbyi has a cosmopolitan distribution and can be found in places where Tubifex tubifex (normally used in toxicity bioassays) does not occur, especially in tropical regions. Due to its high individual biomass, B. sowerbyi is suitable for use in bioaccumulation bioassays. The present study reviews papers that have used this species in toxicology bioassays and were published between 1950 and the first semester of 2012. In the first part, a brief overview is provided of the biology and the life-cycle parameters of B. sowerbyi. In the second part, the bioassays are presented and discussed, and in the third and last part, conclusions about research to date and perspectives about future studies are presented. Throughout the investigation, it was possible to find a total of 30 papers that tested approximately 65 different substances (insecticides, metals, industrial chemicals and others). The majority of the bioassays run are 96-h acute water-only tests, only five were chronic bioassays and two involved bioaccumulation. The lack of research and the small number of tested substances in comparison with the standardized T. tubifex species (i.e. approximately 9 and 44 tested metals for B. sowerbyi and T. tubifex, respectively) can be explained by the absence of a bioassay protocol for B. sowerbyi, causing researchers to choose other species. It is necessary to undertake more methodological research in order to find a better and common methodology for bioassays.

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Rearing and estimation of life-cycle parameters of the tubicifid worm Branchiura sowerbyi: Application to ecotoxicity testing

Cited by 24 publications

References 21 publications

Bioaccumulation of Polybrominated Diphenyl Ethers by Tubifex Tubifex

Bioaccumulation of Polybrominated Diphenyl Ethers by Tubifex Tubifex

The carbon to nitrogen ratio in isoenergetic wheat based diets controls the growth rate of the aquatic worm Lumbriculus variegatus

<strong><em>Branchiura sowerbyi</em> Beddard, 1892 (Oligochaeta: Naididae) as a test species in ecotoxicology bioassays: a review</strong>

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