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S. officinalis hatched

zeekat

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The oldest ones now 2 weeks old. Stil about 20 eggs need to hatch.
And some more pics...
 

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zeekat

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and then one where one catches a frozen mysis.
Sometimes it looks as if they have a square on the back.
 

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DWhatley

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zeekat,
Have you a reference for the marine vs FW crustaceans? I have been trying to find data on this as well because it would open up several foods if we can look at the numbers. I started a thread to compare some of the animals (lobster, shrimp, crayfish and crab) but could only find fat vs protein, not the kind of fats and would like to find and record on that thread any research any one comes across. So much is hearsay on this that it is hard to make an educated call.
 

zeekat

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I' ll see if I can find the references, could be on my laptop at work.

If I remember correctly there are some papers on Sepia culture using alternative prey, but I could only read the abstracts. I think it was procambarus. Artemia failed miserably.
 

zeekat

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The use of alternative diets to culture juvenile cuttlefish, Sepia officinalis: effects on growth and lipid composition

1. A. FERREIRA1,
2. L. MARQUEZ2,
3. E. ALMANSA2,3,
4. J.P. ANDRADE1,
5. A. LORENZO4,
6. P.M. DOMINGUES2
Abstract

The effects of feeding three natural frozen diets, grass shrimp (Palaemonetes sp.), crayfish (Procambarus clarkii) and fish (Sardina pilchardus) and two semi-humid artificial diets (based on fish or shrimp powder) to the cuttlefish, Sepia officinalis, were analysed. Growth rate and feeding rate [FR; % body weight (BW) day−1] and food conversions (FC, %) were determined. Cuttlefish fed shrimp grew larger (3.8% BW day−1) and had the highest FC, followed by those fed crayfish, and sardine. The highest FR was obtained for cuttlefish fed crayfish (10.5% BW day−1). Although both artificial diets were accepted, none produced growth. Digestive gland-to-body weight ratio (DG/BW ratio) was calculated for animals fed each diet. A positive correlation (r = 0.94) between cuttlefish ingestion FR and DG weight was obtained. Mortality occurred mainly during the last week, and some cannibalism occurred among cuttlefish fed artificial diets. Finally, lipid composition of diets, DG and mantle of each group were analysed. Sardine diet was characterized by high levels of triacylglycerol (TG), whereas the main difference between shrimp and crayfish was the higher n-3/n-6 ratio found in shrimp. Changes in the lipid composition of DG were related to diet, but did not correlate with growth data. A strong loss of TG in the DG of artificial diets groups was notable. No differences in mantle lipid composition among the natural diets were found, but artificial diet groups showed higher contents of neutral lipids in their mantle respect to natural diets. According to results obtained, crayfish (P. clarkii) could be used as an alternative prey for rearing S. officinalis compared with shrimp. Artificial diets showed the worst effects in growth and mortality as well as the stronger influence on DG and mantle lipid composition of cuttlefish.
 


DWhatley

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THANKS!! I never thought to look for cuttlefish (oops) articles - I am an octopus keeper so I have looked for studies on octos but it is likely the results will be the same if the content of the food is similar. I found the link to the abstract and posted both on the referenced thread. Should you come across other abstracts or articles with FW and SW crustacean comparisons, PLEASE pm me with a link or post it (I will see it if it is posted) as I believe we are missing quality live food alternatives but want to be very sure before making recommendations.

Unfortunately, I also found an abstract that suggest the crays AND farm raised shrimp do not contain the proper balance of fatty acid (abstracted included with the above article here)

While searching for the link I came across another abstract on first foods that I added to the cuttle care forum.
 

zeekat

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To be honest for me it is not really an issue as I surf and am at the sea every week or every other week.
I have a limitless supply of live crab and shrimp.
 

zeekat

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I found them in France on a beach in Morgat.
The videos you mention are taken at the 'zeelandbrug' which is a 6 km long bridge about an hour drive away from my home. I pass it nearly every time I go surfing.
 

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