Protein and energy digestibility and gonad development of the European sea urchin Paracentrotus lividus (Lamarck) fed algal and prepared diets during spring and fall
By S. Schlosser, I. Lupatsch, J. Lawrence, A. Lawrence, M. Shpigel. 2005
92 citations recorded by the source corpus.
Protein and energy are two of the main limiting factors for sea urchin growth. However, the requirement of daily protein and energy to maximize gonadal production is still unknown. Paracentrotus lividus were fed three experimental diets: Ulva lactuca, Gracilaria conferta and a prepared diet for 2 months in the fall of 1999 and spring of 2000. Sea urchins from a laboratory-cultured population of equal age, weight and test diameter were used. Apparent digestibility coefficients (ADC%) for protein and energy, using acid-insoluble ash as a marker, were measured for all experimental diets. Apparent digestibility coefficients for protein was high (>75%) for all diets. Energy digestibility varied among the diets and was lowest for G. conferta (50-62%). The three diets contained varying digestible protein (DP) to digestible energy (DE) ratios of 25, 26 and12 mg kJ-1 for U. lactuca, G. conferta and the prepared diet respectively. Digestible protein intake was similar for all treatments, but DE intake was greater for sea urchins fed the prepared diet in both seasons. As a result, the gonad production was significantly higher for urchins fed the prepared diet, suggesting that energy was limiting in the algal diets. Paracentrotus lividus spawned during the spring experiment, resulting in protein loss in all treatments. Protein loss was lowest in the sea urchins fed the prepared diet. Enhanced gonadal growth and gamete development of P. lividus resulted from the higher dietary energy content of the prepared diet.
Subfields: Aquatic Science, Global and Planetary Change, Oceanography
View Paper: https://www.semanticscholar.org/paper/1fd364da5a2442e6b2daf6c89f55f984ba8d9a87
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Aquatic Science
In Global and Planetary Change
In Oceanography
Citations in the corpus
- A comparison of the effect of urchin size and diet on gonad yield and quality in the sea urchin Evechinus chloroticus Valenciennes (2008, background): “Feeding prepared diets to urchins can result in increased somatic and gonad growth compared to natural algal diets, although this may not necessarily also result in an improvement in other gonad qualities such as colour, taste and texture (Cook et al. 1998; Pantazis et al. 2000; Pearce et al. 2002, ”