Seasonal Changes in Gonad Index, Biochemical Composition and Heavy Metal Determination of Sea Urchin Paracentrotus lividus Gonads from the South Coast of Morocco

Seasonal variation in the gonad weight and biochemical composition of the sea urchinParacentrotus lividusfrom the Golf of Tunis (Tunisia) were studied between September 2003 and August 2004. The highest gonad indices occurred in March (16.71%). The spawning period occurred between April and July and resulted in a fall in gonad indices to low level (7.12 ± 0.12%). Protein constituted the main component of the gonad, and lipid and carbohydrate were found at appreciable amounts. Consistent with the gonad cycle, sea urchin biochemical components showed clear seasonal variation with a significant decrease during the spawning period. The polyunsaturated fatty acid (PUFA) group was found at high level (40% of the total fatty acids). Of the PUFA group, eicosapentaenoic (C20:5n−3) and eicosatetraenoic (C20:4n−3) were the most abundant gonadal lipids. The level of PUFA was significantly affected by temperature variation showing an increase during the cold months and a decrease in the hot months.

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Heavy metal determination of unfertilised vegetables and univariate analysis of the results

Journal of Chemical Metrology ◽

10.25135/jcm.4.17.02.031 ◽

2017 ◽

Vol 11 (1) ◽

pp. 23-30 ◽

Cited By ~ 2

Author(s):

Mustafa Sahin Dundar ◽

Huseyin Altundag ◽

Aysenur Yılmaz

Keyword(s):

Heavy Metal ◽

Univariate Analysis ◽

Metal Determination ◽

Heavy Metal Determination

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Characterization and Heavy Metal Determination of Starch Obtained from Rambutan (Nephelium lappaceum) Seed

Proceedings of the International Conference of Science, Technology, Engineering, Environmental and Ramification Researches ◽

10.5220/0010095508610864 ◽

2018 ◽

Author(s):

Lia Laila ◽

Bayu Eko Prasetyo ◽

. Mariadi

Keyword(s):

Heavy Metal ◽

Metal Determination ◽

Nephelium Lappaceum ◽

Heavy Metal Determination

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Seasonal changes in the biochemical composition of body components of the sea urchin, Paracentrotus lividus, in Lorbé (Galicia, north-western Spain)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315403007501h ◽

2003 ◽

Vol 83 (3) ◽

pp. 575-581 ◽

Cited By ~ 33

Author(s):

M.F. Montero-Torreiro ◽

P. Garcia-Martinez

Keyword(s):

Seasonal Variation ◽

Sea Urchin ◽

Biochemical Composition ◽

Gonad Index ◽

Paracentrotus Lividus ◽

Dry Weight ◽

Spawning Period ◽

Biochemical Components ◽

Western Spain ◽

North Western

Seasonal variations in the gonad index and the biochemical composition of gonad and gut tissue of the sea urchin, Paracentrotus lividus (Echinodermata: Echinoidea) were determined. Samples were collected from Lorbé (Galicia, north-western Spain) between November 1994 and October 1995. The gametogenic cycle of the sea urchin was annual, with a long, single spawning period from May to August 1995. Most of the biochemical components in gonad showed clear seasonal variation, which was related to the gonad cycle. The main component was protein, which ranged between 36 and 60% of the dry weight, with maximum levels coinciding with the minimum levels of glycogen. Gonad glycogen therefore seemed to be the energy source employed for protein synthesis during gametogenesis. Seasonal variation in total lipids in the gonad was less evident; the main lipidic component was triacylglycerol (around 10% of the dry weight), whereas total cholesterol accounted for less than 1%. The gut does not seem to act as a storage tissue in P. lividus and seasonal variation in biochemical components may be a consequence of fluctuations in the availability of food.

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