ETXV Ecotoxicity Values

oyster in etxv

This is one of the fields contained within the Ecotoxicity superfield (ZECO). For more general information regarding Environmental Fate, see the Ecotoxicity message field (ET).

The ETXV field can contain data for two types of species, fish and invertebrates and for other species as well. For Fish data (which is cited first and which is preceded by an indented line containing "Fish:"), LC50 values (lethal concentration required to kill 50% of the population under study), with duration of exposure, are quoted. Any additional information on bioassay type (static or flow through) and water condition (pH, temperature, hardness or oxygen content) is reported. For invertebrate data (preceded by an indented line containing "Invertebrates:"), LC50 values are also given, with duration of exposure, typically for molluscs and crustaceans. EC50 values, i.e. concentrations which will immobilise 50% of an exposed population are given for microbes, algae and bacteria. Values which will inhibit microbial or algal growth are reported. Duration of exposure is given when available. For other species data (which is preceded by an indented line containing "Other species:"), toxicity to species other than mammals, birds, invertebrates and fish (eg. reptiles, amphibians, plants, seaweeds), is reported here.

Actual data for each type is deliberately indented by four spaces to improve readability; each datum begins on a new line.