18
Dec

Shrimp Glossary

 

·        Antennae – is part of the head and it has a sensory function. It is also known as the second antennae. Also see Shrimp Anatomy

·        Antennules – it is the first pair of small antennae on the head. It also has sensory functions.

·        Appendages – these are evolved chelae which are used to trap food particles from the water column. Also see Bamboo shrimp.

·        Abdomen – This section of the dwarf shrimp is the most muscular section of the shrimp. It comprises of appendages, swimmerets, uropods and telson.

·        Berried – is a term used for a ‘pregnant ’female shrimp that is carrying eggs.

·        Brackish water – is water that has more salinity than fresh water, but not as much as seawater. The mixture of sea water and fresh water is what is refered to as brackish. Brackish water habitats are found within estuaries.

·        Crystal Red Shrimp (CRS) – is a breed variant of the freshwater Bee shrimp.

·        Carapace – the carapace is the head shield that protects vital organs of the shrimp. It is the strongest section of a dwarf shrimp.  The shell on this section is thicker to protect all of the shrimp’s vital organs.  All legs, maxillipeds, the rostrum and eyes are attached to the carapace.

·        Chela (Chelae) – also called pincers.

·        Cheliped – any chela or, (claw)-bearing thoracopod; these usually refers to first pair(s) of pereiopods.

·        Estuary – an estuary is a body of water where fresh and salt water mix.

·        Exoskeleton – outer shell of an invertebrate .

·        High Order – this is a reference for shrimp that hatch eggs and the young ones are miniaturized versions of the adult. They do not have a larvae stage. Also see low order.

·        Hydra – they are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa. The creatures are found in fresh water. They have tentacles that stretch out when looking for prey. If the prey gets in contact with these tentacles, the hydra releases some neurotoxins that will paralyze it. They are asexual and tend to reproduce rapidly in warm waters. Their distinct appearance is enchanting but they can be deadly to small aquatic invertebrates such as Daphnia and Cyclops. There have been reports of hydra being harmful to small fry and shrimp.

·        Low Order – this is a reference for shrimp that hatch eggs that have a larvae stage and therefore not able to produce mini-shrimp until a later stage of development. See also high order

·        Maxillipeds – these are three pairs of legs within the thorax region. The pairs of legs are modified for feeding.

·        Molting – the process of shedding an invertebrate’s exoskeleton.

·        Pereiopod(s) – are primarily walking legs. Usually the first two pairs of pereopods are equiped with chelae (claws) that are referred to as chelipeds.  The chelae are used for food searching and handling, aggression and defense and grooming.

·        Pleopods – also known as natapods or swimmerets. They are part of the abdomen region and are primarily swimming organs/legs. These small swimming legs are found on the underside of the Abdomen. The female shrimp mainly uses them to hold eggs and fanning them. She continuously oxygenates them by rapidly moving these legs.                          

·        Rostrum – is the pointed “nose” on the front of the dwarf shrimp between the eyes.  The Rostrum is one of the dwarf shrimp’s distinctive features.

·        Swimmerets – see pleopods.

·        Tail Fan – the uropods and telson together make up the tail fan.

·        Telson – also known as a tail piece.

·        Uropod – It is part of the tail section of a shrimp. The paired appendage attached to the sixth abdominal segment, usually combining with the telson to form a tailfan. The function of the uropod is for protection and fast reaction as this allows the shrimp to have a rapid backwards acceleration facilitated by the muscular abdomen. Essentially it is used for swimming.

·        Walking Legs – Also see pleopods

·        Zoea – Is the larva of a newly hatched shrimp at an early stage where it still looks like planktonic. It is also called a larva because it swims with its thoracic appendages, at first using maxillipedal exopods and at a later stage the pereopodal ones.

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