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Number of Results: 119

abiotic

abrasion

absorption

abyss

abyssal plain

abyssobenthic

abyssopelagic

acclimation

acclimatization

accumulation

acid

acid -soil

acid iron waste

acid rain

acid-base balance

acidophilic

activated sludge process

acute

acute toxicity

adaptation

adenosine triphosphate (ATP)

adhesion

adhesive eggs

adipose tissue

adsorption

adult

aeolian depostis

aeration

aerobic

aerobic bacteria

affinity index

age composition

age group (class)

agglutination

aggregation

agonistic behaviour

agricultural waste

air

air saturation value of dissolved oxygen

albinism

aldehydes

alga

algal bloom

algal toxicosis

algicides

alien

alkalinity

alkalinity, total

allele

allelic frequency

allopatric

alluvial deposit

alluvium

alpha-radiation

altruistic behaviour

ambient

amino acid

ammonia

ammonia toxicity

ammonification

amnesic shellfish poisoning (ASP)

amorphous

amphiatlantic

amphibiotic

amphidromous

amplitude

anadromous

anaerobic

anaerobic bacteria

anaerobic digestion

anaerobic respiration

analysis of variance

androgens

annelids

annual production

ANOVA

anoxia

anoxic

anoxic substratum

anoxic zone

antagonism

Antarctic cirumpolar current

Antarctic convergence

Antarctic divergence

anthropogenic

anti-fouling agent

antibiotic

antiboreal

antigenic drift

aphotic

Apogean tides

aquaculture

aquatic organism

aquifer

archibenthal zone

arenaceous

argillaceous

arithmetic mean

artefact

artificial fertilization

artificial reef

ash-free dry weight

assimilation

assimilative capacity

assimilative efficiency

association

astronomic tide

asymmetry

asymptomatic distribution

atmosphere

atmospheric inputs

aufwuchs

austral

autecology

autochthonous

autotroph

average distance

avoidance response

azoic

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anti-fouling agent

Definition

A collective term used for that group of compounds (coatings or paints), often containing metals, which are applied to structures and equipment to prevent attachment of fouling organisms; examples include tributyl tin TBT which is commonly used in shipping. Though these compounds have been used in many aquatic situations, their use in aquaculture is now regulated because of detrimental effects on molluscs as well as their accumulation in finfish, when used to treat cage netting. Other anti-foulants, using alternative chemical agents are commercially available. The latest developments include Teflon and multi-layer coatings which peel off or are self-polishing, thus allowing the removal of settled organisms without toxic action. Some of these new materials are partly bio-degradable and thus more environmentally acceptable.

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