Effects Of Dietary Carbohydrate On Weight Gain And Gonad Production In Small Sea Urchins, Lytechinus Variegatus

Taylor, A. M.; Heflin, L. E.; Powell, M. L.; Lawrence, A. L.; Watts, S. A.

doi:10.1111/anu.12403

Effects Of Dietary Carbohydrate On Weight Gain And Gonad Production In Small Sea Urchins, Lytechinus Variegatus

2017
By Taylor, A. M. ; Heflin, L. E. ; Powell, M. L. ; ...

Public Access Version Available on: January 01, 2030, 12:00 AM

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Journal Title:

Aquaculture Nutrition
Personal Author:

Taylor, A. M. ; Heflin, L. E. ; Powell, M. L. ; Lawrence, A. L. ; Watts, S. A.
NOAA Program & Office:

Sea Grant ; OAR (Oceanic and Atmospheric Research)
Sea Grant Program:

MASGC (Mississippi-Alabama Sea Grant Consortium) ; NSGO/NSGLC (National Sea Grant)
Description:

In experiment 1, juvenile sea urchins (n = 80, 0.088 ± 0.001 g wet weight and 5.72 ± 0.04 mm diameter) were held individually and fed ad libitum one of three semi‐purified formulated diets (n = 16 individuals treatment−1). In the diets, protein was held constant (310 g kg−1 dry, as fed) and carbohydrate level varied (190, 260, or 380 g kg−1 dry, as fed). Wet weights were measured every 2 weeks. Total wet weight gain was inversely proportional to dietary carbohydrate level and energy content of the respective diet. In experiment 2, sea urchins (5.60 ± 0.48 g wet weight, n = 40) fed 190 g kg−1 carbohydrate consumed significantly more dry feed than those fed 260 g kg−1, but not more than those fed 380 g kg−1 carbohydrate. Based on differential feed intake rates, sea urchins that consumed more feed also consumed higher levels of protein and had the highest weight gain. Consequently, protein content and/or protein: energy ratio may be important in determining feed utilization and growth among sea urchins in this study. The average digestible energy intake was approximately 70 kcal kg−1 body weight day−1, suggesting daily caloric intake of juvenile Lytechinus variegatus is lower than in shrimp and fish.
Keywords:

Diet Sea Urchins Sea Urchins Lytechinus variegatus
Source:

Aquaculture Nutrition 23(2): 375-386, 2017
DOI:

https://dx.doi.org/10.1111/anu.12403
Pubmed Central ID:

28479861
Document Type:

Journal Article
Funding:

Grant no. NA16RG2258 ; Grant no. NA06OAR4170078
Compliance:

PMC
Main Document Checksum:

urn:sha256:391ecbdc674f40d5b29aafe0c5770bf1f4eee02d47a3eb6cd09b95c6eaac7d03
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