Organism. By A. Gaul. They have a good biochemical composition in terms of essential fatty acids. Production rates and characteristics of fecal pellets of the copepod Acartia tonsa under simulated phytoplankton bloom conditions: implications for vertical fluxes Defining characteristics are: Long first antennae (at least half the length of their bodies) Branched second antennae ; Joint between the fifth and sixth body segments; Non-extensive rostral margin; Sausage-like body morphology; If your specimen … This is the Reef Shotz Acartia tonsa culture after two weeks fed exclusively on their AT feed. The calanoid copepod Acartia tonsa is recognized as an emerging biological model, a source of live prey for aquaculture purposes (Drillet et al., 2006) and is widely used for evaluation of marine contaminants (Stancheva et al., 2015). Acartia tonsa. Acartia (Acanthacartia) tonsa . Home » Crustaceans » Copepods » Calanoida » Acartia (Acanthacartia) tonsa. As an example, Gaedke and Ebenhöh presented in 1991 a study on the interaction between two estuarine species of copepods, Acartia tonsa and Eurytemora affinis.They first used a simple model based on eqns [25] and [26] including (a) predation (including self-predation of immature stages) by Acartia on the two, (b) a term of biomass gain of Acartia by this predation, and (c) a density … This microscopic organism commonly referred to as a copepod don’t get any bigger then 2mm and can usually be seen with the naked eye. An amazing population explosion over such a short time.... We … click on image for more illustrations Distribution: Worldwide, in the Atlantic, Indian, and Pacific oceans, and the Azov, Baltic, Black, Caspian, and Mediterranean seas. Common name: Copepod. It has a relatively short abdomen, and relative body width is higher than in sympatric congeners. Acartia tonsa is usually about 1 mm long (up to 1.5 mm) (Garmew et al., 1994; Belmonte et al., 1994; Marcus & Wilcox, 2007) and hence a microscope is required for identification. Production rates and characteristics of fecal pellets of the copepod Acartia tonsa under simulated phytoplankton bloom conditions: implications for vertical fluxes Mari Butler, Hans G. Dam* Department of Marine Sciences, University of Connecticut, Groton, Connecticut 06340-6097, USA Acartia tonsa. Taxonomic Group Characteristics. Taxon-Order: Calanoida. Acartia (Acanthacartia) tonsa from Northeastern and Middle Caspian Sea, male and female, is re-described. They are apart of the order Calanoida, who is …