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Standard Practice for Sampling Fish with Rotenone
Automaticky přeložený název:
Standardní praxe pro odběr vzorků ryb s rotenonu
NORMA vydána dne 1.1.2014
Označení normy: ASTM D4131-84(2014)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.1.2014
Kód zboží: NS-26166
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
ICS Number Code 67.120.30 (Fish and fishery products)
1. Scope | ||
1.1 This practice covers determination of the quantitative and qualitative species composition of fish in a specified area. The successful use of this technique is dependent on: (1) preventing fish from escaping the sample area and (2) retrieving all affected fish, which may take up to three days. 1.2 Advantages: 1.2.1 Easily detoxified. 1.2.2 All native freshwater fish are susceptible, but it has low toxicity to mammals and birds. 1.2.3 At low concentrations fish toxicity depends on species, age, and size. 1.2.4 The suffocating action is reversible. 1.3 Limitations: 1.3.1 It is less effective in cold (below 20°C) and highly alkaline water. 1.3.2 Smaller fish and those without air bladders usually do not float. 1.3.3 Completely random selection of sample areas is not possible. 1.3.4 Overkill beyond sample area can sometimes occur. 1.3.5 Food web organisms may be eliminated. 1.4 Applications—this practice is useful in both short- and long-term studies for management and impact assessment purposes. It is adaptable to both lotic and lentic situations in littoral and limnetic areas. 1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.6 This standard does not
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Specification for Reagent
Water |
NEPLATNÁ
1.7.2011
1.1.1992
1.2.1992
1.7.1992
1.2.1993
1.2.1993
Poslední aktualizace: 02.05.2024 (Počet položek: 2 896 910)
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