Motionless of snail Hydrobia ulvae (Pennant) as response to sediment toxicity and its consequences for the post-exposure feeding

Autores/as

  • Cristiano VM Araujo Imar, Universidade de Coimbra
  • Julián Blasco Instituto de Ciencias Marinas de Andalucía (CSIC)
  • Ignacio Moreno-Garrido Instituto de Ciencias Marinas de Andalucía (CSIC)

DOI:

https://doi.org/10.5132/eec.2013.02.011

Resumen

Post-exposure feeding and motionless may be useful endpoints for assessing toxicity. The present study aimed to examine (i) the immobility of the estuarine snail Hydrobia ulvae resulting from short-term exposure to copper-spiked sediment, and subsequently, (ii) the potential application of post-exposure feeding (indirectly measured as pellets excreted) as an ecotoxicological response associated with motionlessness. Mobility and post-exposure feeding were influenced by copper contamination. Motionless was noticeable above the concentration of 200 μg Cu g-1, where 40% of the organisms were inactive. Practically all the organisms remained active at the two lowest concentrations: 40 (control) and 60 μg Cu g-1. For 400 and 800 μg Cu g-1 the motionless was generally higher than 50%. Mortality higher than 25% was observed at 200, 400 and 800 μg Cu g-1, with values of 27, 40 and 60%, respectively. The feeding inhibition values showed an increasing inhibition from 20% at the lowest concentration (60 μg Cu g-1), up to 59% at 400 μg Cu g-1; at concentration of 800 μg Cu g-1, although the physical activity inhibition had reached 67%, the post-exposure feeding was 1.5 higher in relation to the control. Probably, the starvation period due to motionless during exposure seems to increase the post-exposure feeding and egestion when food was provided; alternatively, increased pellet production could also indicate a detoxification process.

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Publicado

2013-12-01

Cómo citar

Araujo, C. V., Blasco, J., & Moreno-Garrido, I. (2013). Motionless of snail Hydrobia ulvae (Pennant) as response to sediment toxicity and its consequences for the post-exposure feeding. Ecotoxicology and Environmental Contamination, 8(2), 69–75. https://doi.org/10.5132/eec.2013.02.011

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