Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates

Martin Grosell, J. Blanchard, K. V. Brix, R. Gerdes

Research output: Contribution to journalArticle

170 Citations (Scopus)

Abstract

The present paper presents original data and a review of the copper (Cu) toxicity literature for estuarine and marine environments. For the first time, acute Cu toxicity across the full salinity range was determined. Killifish, Fundulus heteroclitus, eggs were hatched in freshwater (FW), 2.5, 5, 10, 15, 22 and 35 ppt (seawater, SW) and juveniles were allowed to acclimate for 7 days prior to acute toxicity testing. Sensitivity was highest in FW (96 h LC50: 18 μg/l), followed by SW (96 h LC50: 294 μg/l) with fish at intermediate salinities being the most tolerant (96 h LC50 > 963 μg/l at 10 ppt). This approximately 50-fold, non-linear variation in sensitivity could not be accounted for by Cu speciation or competition among cations but can be explained by physiology. The relative Na+ gradient from the blood plasma to the water is greatest in FW followed by SW and is smallest at 10 ppt. Regression of Cu toxicity versus the equilibrium potential for Na+, which reflects the relative Na+ gradient, revealed that 93% of the variation can be attributed to Na+ gradients and thus osmoregulatory physiology. Examination of the existing literature on acute Cu toxicity in SW (defined as >25 ppt) confirmed that early life stages generally are most sensitive but this pattern may be attributable to size rather than developmental stage. Regardless of developmental stage and phylogeny, size clearly matters for Cu sensitivity. The existing literature on the influence of salinity on acute Cu toxicity as well as studies of mechanisms of Cu toxicity in fish and invertebrates are reviewed.

Original languageEnglish
Pages (from-to)162-172
Number of pages11
JournalAquatic Toxicology
Volume84
Issue number2 SPEC. ISS.
DOIs
StatePublished - Aug 30 2007

Fingerprint

Salinity
Seawater
acute toxicity
Invertebrates
physiology
Copper
Fishes
seawater
invertebrate
copper
Fresh Water
invertebrates
Fundulidae
lethal concentration 50
salinity
toxicity
fish
toxicity testing
developmental stages
Fundulus heteroclitus

Keywords

  • BLM
  • Cu
  • Fundulus heteroclitus
  • Killifish
  • Toxic mechanism

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates. / Grosell, Martin; Blanchard, J.; Brix, K. V.; Gerdes, R.

In: Aquatic Toxicology, Vol. 84, No. 2 SPEC. ISS., 30.08.2007, p. 162-172.

Research output: Contribution to journalArticle

Grosell, Martin ; Blanchard, J. ; Brix, K. V. ; Gerdes, R. / Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates. In: Aquatic Toxicology. 2007 ; Vol. 84, No. 2 SPEC. ISS. pp. 162-172.
@article{dd97eedf45fc4d77bcf643a5688b9d54,
title = "Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates",
abstract = "The present paper presents original data and a review of the copper (Cu) toxicity literature for estuarine and marine environments. For the first time, acute Cu toxicity across the full salinity range was determined. Killifish, Fundulus heteroclitus, eggs were hatched in freshwater (FW), 2.5, 5, 10, 15, 22 and 35 ppt (seawater, SW) and juveniles were allowed to acclimate for 7 days prior to acute toxicity testing. Sensitivity was highest in FW (96 h LC50: 18 μg/l), followed by SW (96 h LC50: 294 μg/l) with fish at intermediate salinities being the most tolerant (96 h LC50 > 963 μg/l at 10 ppt). This approximately 50-fold, non-linear variation in sensitivity could not be accounted for by Cu speciation or competition among cations but can be explained by physiology. The relative Na+ gradient from the blood plasma to the water is greatest in FW followed by SW and is smallest at 10 ppt. Regression of Cu toxicity versus the equilibrium potential for Na+, which reflects the relative Na+ gradient, revealed that 93{\%} of the variation can be attributed to Na+ gradients and thus osmoregulatory physiology. Examination of the existing literature on acute Cu toxicity in SW (defined as >25 ppt) confirmed that early life stages generally are most sensitive but this pattern may be attributable to size rather than developmental stage. Regardless of developmental stage and phylogeny, size clearly matters for Cu sensitivity. The existing literature on the influence of salinity on acute Cu toxicity as well as studies of mechanisms of Cu toxicity in fish and invertebrates are reviewed.",
keywords = "BLM, Cu, Fundulus heteroclitus, Killifish, Toxic mechanism",
author = "Martin Grosell and J. Blanchard and Brix, {K. V.} and R. Gerdes",
year = "2007",
month = "8",
day = "30",
doi = "10.1016/j.aquatox.2007.03.026",
language = "English",
volume = "84",
pages = "162--172",
journal = "Aquatic Toxicology",
issn = "0166-445X",
publisher = "Elsevier",
number = "2 SPEC. ISS.",

}

TY - JOUR

T1 - Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates

AU - Grosell, Martin

AU - Blanchard, J.

AU - Brix, K. V.

AU - Gerdes, R.

PY - 2007/8/30

Y1 - 2007/8/30

N2 - The present paper presents original data and a review of the copper (Cu) toxicity literature for estuarine and marine environments. For the first time, acute Cu toxicity across the full salinity range was determined. Killifish, Fundulus heteroclitus, eggs were hatched in freshwater (FW), 2.5, 5, 10, 15, 22 and 35 ppt (seawater, SW) and juveniles were allowed to acclimate for 7 days prior to acute toxicity testing. Sensitivity was highest in FW (96 h LC50: 18 μg/l), followed by SW (96 h LC50: 294 μg/l) with fish at intermediate salinities being the most tolerant (96 h LC50 > 963 μg/l at 10 ppt). This approximately 50-fold, non-linear variation in sensitivity could not be accounted for by Cu speciation or competition among cations but can be explained by physiology. The relative Na+ gradient from the blood plasma to the water is greatest in FW followed by SW and is smallest at 10 ppt. Regression of Cu toxicity versus the equilibrium potential for Na+, which reflects the relative Na+ gradient, revealed that 93% of the variation can be attributed to Na+ gradients and thus osmoregulatory physiology. Examination of the existing literature on acute Cu toxicity in SW (defined as >25 ppt) confirmed that early life stages generally are most sensitive but this pattern may be attributable to size rather than developmental stage. Regardless of developmental stage and phylogeny, size clearly matters for Cu sensitivity. The existing literature on the influence of salinity on acute Cu toxicity as well as studies of mechanisms of Cu toxicity in fish and invertebrates are reviewed.

AB - The present paper presents original data and a review of the copper (Cu) toxicity literature for estuarine and marine environments. For the first time, acute Cu toxicity across the full salinity range was determined. Killifish, Fundulus heteroclitus, eggs were hatched in freshwater (FW), 2.5, 5, 10, 15, 22 and 35 ppt (seawater, SW) and juveniles were allowed to acclimate for 7 days prior to acute toxicity testing. Sensitivity was highest in FW (96 h LC50: 18 μg/l), followed by SW (96 h LC50: 294 μg/l) with fish at intermediate salinities being the most tolerant (96 h LC50 > 963 μg/l at 10 ppt). This approximately 50-fold, non-linear variation in sensitivity could not be accounted for by Cu speciation or competition among cations but can be explained by physiology. The relative Na+ gradient from the blood plasma to the water is greatest in FW followed by SW and is smallest at 10 ppt. Regression of Cu toxicity versus the equilibrium potential for Na+, which reflects the relative Na+ gradient, revealed that 93% of the variation can be attributed to Na+ gradients and thus osmoregulatory physiology. Examination of the existing literature on acute Cu toxicity in SW (defined as >25 ppt) confirmed that early life stages generally are most sensitive but this pattern may be attributable to size rather than developmental stage. Regardless of developmental stage and phylogeny, size clearly matters for Cu sensitivity. The existing literature on the influence of salinity on acute Cu toxicity as well as studies of mechanisms of Cu toxicity in fish and invertebrates are reviewed.

KW - BLM

KW - Cu

KW - Fundulus heteroclitus

KW - Killifish

KW - Toxic mechanism

UR - http://www.scopus.com/inward/record.url?scp=34547739112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547739112&partnerID=8YFLogxK

U2 - 10.1016/j.aquatox.2007.03.026

DO - 10.1016/j.aquatox.2007.03.026

M3 - Article

C2 - 17643507

AN - SCOPUS:34547739112

VL - 84

SP - 162

EP - 172

JO - Aquatic Toxicology

JF - Aquatic Toxicology

SN - 0166-445X

IS - 2 SPEC. ISS.

ER -