Lysmata debelius LYSDEB-060898-SANRAV-002

This entry was posted on Monday, June 8th, 1998 and is filed under Shrimps, Spawning Reports.

The Breeder’s Registry©Information contained in this report is taken from submitted observations from aquarist unless noted otherwise (see comments). Information may be reproduced providing the Breeder’s Registry is cited.


Breeder ID: LYSDEB-060898-SANRAV-002

Date received: 6/8/98

Identification: Lysmata debelius (Bruce, 1983)

Geographic origin: Indo-pacific


Taxonomy: (after I.C.Z.N.)

Kingdom Animalia

Phylum Arthropoda Subphylum Crustacea

Class Malacostraca Subclass Eumalacostraca

Superorder Eucarida Order Decapoda

Suborder Pleocyemata (=Eukyphida) Infraorder Caridea

Superfamily Alpheoidea Family Hippolytidae

Genus Lysmata (Risso, 1816)

Species debelius (Bruce, 1983)


Sex: Simultaneous hemaphrodites, need to “pair” up

Duration (yr): 0.5 years

Size: 3 “pairs”; 40.0 mm, 40.0 mm; 43.0 mm, 52.0 mm; 55.0 mm, 51.5 mm

Adult diet: Mussel (Mytilus edulis) and lugworm (Arenicola marina) 1/5 mussel and 2 cm segment of lugworm daily. Removed 4 – 5 hours after to minimize water quality deterioration.

Pre-spawning activity: Shrimp store sperm for at least 2 clutches without copulation.

Time spawning began: several hours after molt

Area spawning occurred: not specific (in broodstock aquaria)

Frequency of spawning: 11 – 16 days

Egg(s) description: green. Number and size dependant upon broodstock condition/nutrition.

Approximate quantity: 300 – 400

Size: not indicated

Incubation period: 6 – 8 days

Time hatching occurred: night

Newly hatched appear: very photo-positive

Size of hatching larvae: 2.6 mm, yolk sac not present

Method removal/transfer: Larvae siphoned using a rubber hose (adults will feed on larvae!)


Spawning tank size(liter): 67 liters, 60 cm x 37.5 cm x 30 cm

Sides of tank covered? no

Lighting & photo period: 12 hour light, 12 hour dark, lighting ~ 2 meters from surface (aquaculture research facility)

Filtration: UGF with fine gravel on top

Additives & doses: natural seawater prefiltered through 0.2 micron then treated with UV. 50% weekly water changes.

Specific gravity: natural seawater

pH: 7.5 – 8.0

Temperature: 28 \F0C (27 – 29 \F0C fluctuations)


Fry development/changes: Stage I: 1 day old. Eyes not yet developed on stalks. Attracted to light.

First food offered: Artemia 5 – 10 / ml / per day

Survival: Week 1 = 60%, Week 2 = 20%, Week 3 = 7%, Week 4 = 3%. None survived past 31 days.


Larval rearing tank size(liter): 2 liter flasks, then 5 liter buckets at Stage V

Lighting & photo period: 12 hour light, 12 hour dark, lighting ~ 2 meters from surface (aquaculture research facility)

Filtration: none

Additives & doses: natural seawater prefiltered through 0.2 micron then treated with UV. Daily water changes- every day count larvae and restock feed density.

Specific gravity: natural seawater

pH: 7.5 – 8.0

Temperature: 28 \F0C (27 – 29 \F0C fluctuations)


Comments: Larvae go through many stages. Develop rapidly but overall pelagic phase up to 100+ days. Surprised by previous report of only 56 days to juvenile. Research conducted as part of MSc thesis. University of Wales, Bangor School of Ocean Sciences. Menai Bridge, LL59 5EY, United Kingdom

Word origin: Lysmata appears to be from the Greek roots Lys meaning loose and mat, -aeo,-eo, meaning foolish or idle. The species debelius is in honor of Helmut Debelius who sent this commonly seen shrimp to a specialist to get a positive identification. This resulted in the discovery that the species had not been described and was subsequently named in his honor.

The literal translation for the genus seems a bit confusing and Lysmata may refer to the cleaner shrimps leaving the substrate (loose) to clean fish capable of eating them (foolish).

The order Decapoda means “ten legs”; deca indicating ten and pod meaning foot. The suborder Pleocyemata is from the Greek roots pleo  meaningfull, more or swim; cyemato means an embryo. The infraorder Caridea is from the Latin word carid meaning shrimp. The family Hippolytidae are the “cleaner” shrimp. The Greek roots hippo meaning “horse” and ly another word for loose, and idae being a standard suffix for an animal, although generally used on family designations.

About this report: Information contained in this report is taken from submitted observations. Taxonomy, Synonomy, Original description , Word origin and Suggested reading are provided by member(s) of The Breeder’s Registry staff. Information is presented under the belief that it is accurate. If you have information in addition to, or contrary to that presented you are encouraged to contact the Breeder’s Registry. Permission is granted for “one-time” personal use. Reproduction as distributed or accessible media is prohibited without prior written permission. All rights reserved. 1998

 

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