Cited by 48Environmental Toxicology and EcotoxicologyHeavy Metal Exposure and ToxicityCrustacean biology and ecology

Effects of manganese on chemically induced food search behaviour of the Norway lobster, Nephrops norvegicus (L.)

Krång, Anna-Sara, Rosenqvist, Gunilla·2006·Aquatic Toxicology

Abstract

The decapod Norway lobster, Nephrops norvegicus (L.), lives on muddy sediments rich in manganese (Mn). In hypoxic conditions, manganese is reduced and released from the sediment, so increased concentrations of dissolved Mn(2+) become bioavailable. In excess, manganese acts as a neurotoxin and may inhibit vital functions of benthic organisms, such as muscle contraction. We investigated in a laboratory flume experiment, the effect of environmentally realistic concentrations of manganese (0.1 and 0.2mM for 12 days) on the food search behaviour of N. norvegicus. We found that lobsters exposed to manganese had a more than doubled reaction time to food odour stimuli compared to the controls (p<0.05). In addition, manganese exposure reduced the number of N. norvegicus reaching the food stimuli source. Compared to the controls where 86% reached the stimuli source, only about half of the lobsters exposed to 0.1mM Mn and one-third of the lobsters exposed to 0.2mM Mn reached the stimuli source (p<0.05 and 0.001, respectively). There was no significant difference between treatments in the number of lobsters leaving their shelter or in the time from reaction until leaving the shelter and there was no difference in search time for those animals that eventually did locate the stimuli source. This study shows that environmentally realistic manganese concentrations affect parts of the food search behaviour of N. norvegicus, likely due to impaired chemosensory ability or reduced motivation for feeding. Thus, the ability of N. norvegicus to detect and find food can be reduced in areas with high manganese concentrations, with possible consequences on individual and population levels.

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Crossref · 10.1016/j.aquatox.2006.04.001

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Authors
Krång, A.-S., & Rosenqvist, G.
Affiliations
  • University of Gothenburg (SE)
  • Norwegian University of Science and Technology (NO)
Corresponding author
Krång, Anna-Sara
Venue
Aquatic Toxicology
Publisher
Elsevier BV
Published
2006-06
Volume
78
Issue
3
Pages
284-291
ISSN
0166-445X (ISSN-L)
OpenAlex
W2028612785
Cited by
48
References
52
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 14 · 2017: 5 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 1
FWCI
1.52
Type
journal article
Language
en
Open access
closed
Locations
  • Aquatic Toxicology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
  • Physical Sciences › Environmental Science › Ecology › Crustacean biology and ecology
Keywords
manganese, Norway lobster, reaction time, food motivation, neurotoxicity, hypoxia, Decapoda, benthic organisms
MeSH terms
Analysis of Variance, Animals, Environmental Monitoring, Feeding Behavior, Nephropidae, Male, Manganese, Time Factors, Water Pollutants, Chemical

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