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Table 1 Results of the questionnaire issued to 19 European facilities that keep bottlenose dolphins (Tursiops truncatus)

From: Vitamin blood concentration and vitamin supplementation in bottlenose dolphins (Tursiops truncatus) in European facilities

Questionnaire section   Number [%]
Ordering and purchasing Number of fish species ordered 2–4 7 37
5–6 11 58
>6 1 5
Fish species fed Herring 16 a
Squid 16
Capelin 16
Sprat 13
Mackerel 11
Fish history checked Yes 14 74
No 5 26
Fish wholesaler used Wholesaler A 10 53
Wholesaler B 4 21
Fish freezing method Block frozen 19  
Individually frozen 3
Fish block size 1–10 kg 7  
10.1–20 kg 14
20.1–40 kg 11
Shipment inspection Documentation 13  
Sings of thawing 14
Temperature 10
Manually for firmness 11
Storing and thawing Nutritional analysis conducted With every shipment 15 79
Every 3 months 4 21
Vitamin analysis conducted   0 0
Storage time 1–2 months 4 21
3–6 months 10 53
7–12 months 5 26
Handling thawed fish Time before feeding <24 h 18 95
24–48 h 1 5
Feeding Fish preparation Cutting 6 32
No cutting 13 68
  1. N Number of institutions, aif more than one answer was given, no percentage could be calculated