Recently, environmental bio monitoring strategies are more than ever at the heart of the concerns... more Recently, environmental bio monitoring strategies are more than ever at the heart of the concerns of the studying groups from international bodies. The use of chosen bioindicators within the affected marine communities represents one of the means of assessing the impact of human development on marine ecosystems to prevent critical situations by setting up restoration and conservation tools. The species most often frequenting Algerian waters are Holothuria forskali, Holothuria stellati, Holothuria (Roweothuria) poli, Holothuria (Platyperona) sanctori ARTICLE INFO ABSTRACT Article History: Received: Jan. 7, 2021 Accepted: May 28, 2021 Online: June 25, 2021 _______________
Seasonal variation in the physiological indices and biochemical composition of the sea urchin Par... more Seasonal variation in the physiological indices and biochemical composition of the sea urchin Paracentrotus lividus (Lamarck, 1816) (Echinodermata Echinoidea) from the west coast of Algeria were studied between March 2016 and February 2017 from three stations of different nature and geographical position: Sidi Lakhdar (S1), Cap Carbon (S2), and Benisaf harbor (S3). Two spawning period occurred in spring and autumn, resulting in a fall in gonad indices to a low level with values between 2.14 and 3.65%. The seawater temperature in the three sampling stations revealed that the latter had a spawning rate at 9-15 °C in spring and 24 and 11 °C in autumn corresponding to the two peaks of spawning. The biochemical composition of the gonads protein contents, carbohydrates and lipids were recorded with a high percentage for proteins between (25.80 and 45.23%) followed by that of lipids (9.21 and 14.40%) and finally carbohydrates (3.49 and 7.39%). In accordance with the gonad cycle, sea urchin lipids and proteins show a marked seasonal variation with a decrease in their percentages during the spawning period. Protein levels had an inverse profile with carbohydrates, with their values at a minimum when carbohydrates were at their maximum. The profile of the total components in the gut content is almost the same as in the gonads with minus values. A relationship has been found between the biochemical components of the gonads and the digestive tract during gametogenesis, the latter seems to be an organ that tends to store nutrients, indicating that populations of sea urchin P. lividus are in good nutritional conditions.
The present work was organized to evaluate the trace metal
contaminations of Cu, Cd, Pb, Zn, and ... more The present work was organized to evaluate the trace metal contaminations of Cu, Cd, Pb, Zn, and Ni in the organs of Holothuria tubulosa (Gmelin, 1791), at two sites on the Algerian west coast; Ain Franine (AF) and Sidi Lakhdar (SL). The obtained concentrations revealed the presence of heterogeneous metal contents and showed that the most important concentrations were relatively detected in zinc, with values of the male gonads at the level of AF (16.39 ± 2.38 mg / kg PF) for winter and SL (4.65 ± 0.59mg / kg PF) for summer. The lowest zinc values were recorded on the integument for the two sites. The highest Cu values were recorded in spring on the integument of two groups of Holothuria tubulosa. Nickel concentrations showed a high value in the integuments in males (1.08 ±0.03mg / kgP.F) at AF during summer and at SL in spring (0.93 ± 0.02mg / kg PF). While they recorded the lowest values in winter for sea cucumbers of FA and in spring for those of SL for the same organ. The lead concentrations revealed high values on the integument with (1.77 ± 0.56 mg / kg PF) in winter for SL sea cucumbers and (1.36 ± 0.04 mg / kg PF) in summer for those from AF. Moreover, cadmium targeted the same organ as lead where high values were noticed on the integuments during fall for the two communities of sea cucumbers of the order of (0.51 ± 0.03 mg / kg PF) to AF and from (0.43 ± 0.01mg / kg PF) to SL. The analysis of the metal concentrations obtained revealed that, despite the difference in biotope, the two communities of Holothuria tubulosa did not present a significant difference (P> 0.005) for all the metals considered.
Recently, environmental bio monitoring strategies are more than ever at the heart of the concerns... more Recently, environmental bio monitoring strategies are more than ever at the heart of the concerns of the studying groups from international bodies. The use of chosen bioindicators within the affected marine communities represents one of the means of assessing the impact of human development on marine ecosystems to prevent critical situations by setting up restoration and conservation tools. The species most often frequenting Algerian waters are Holothuria forskali, Holothuria stellati, Holothuria (Roweothuria) poli, Holothuria (Platyperona) sanctori ARTICLE INFO ABSTRACT Article History: Received: Jan. 7, 2021 Accepted: May 28, 2021 Online: June 25, 2021 _______________
Seasonal variation in the physiological indices and biochemical composition of the sea urchin Par... more Seasonal variation in the physiological indices and biochemical composition of the sea urchin Paracentrotus lividus (Lamarck, 1816) (Echinodermata Echinoidea) from the west coast of Algeria were studied between March 2016 and February 2017 from three stations of different nature and geographical position: Sidi Lakhdar (S1), Cap Carbon (S2), and Benisaf harbor (S3). Two spawning period occurred in spring and autumn, resulting in a fall in gonad indices to a low level with values between 2.14 and 3.65%. The seawater temperature in the three sampling stations revealed that the latter had a spawning rate at 9-15 °C in spring and 24 and 11 °C in autumn corresponding to the two peaks of spawning. The biochemical composition of the gonads protein contents, carbohydrates and lipids were recorded with a high percentage for proteins between (25.80 and 45.23%) followed by that of lipids (9.21 and 14.40%) and finally carbohydrates (3.49 and 7.39%). In accordance with the gonad cycle, sea urchin lipids and proteins show a marked seasonal variation with a decrease in their percentages during the spawning period. Protein levels had an inverse profile with carbohydrates, with their values at a minimum when carbohydrates were at their maximum. The profile of the total components in the gut content is almost the same as in the gonads with minus values. A relationship has been found between the biochemical components of the gonads and the digestive tract during gametogenesis, the latter seems to be an organ that tends to store nutrients, indicating that populations of sea urchin P. lividus are in good nutritional conditions.
The present work was organized to evaluate the trace metal
contaminations of Cu, Cd, Pb, Zn, and ... more The present work was organized to evaluate the trace metal contaminations of Cu, Cd, Pb, Zn, and Ni in the organs of Holothuria tubulosa (Gmelin, 1791), at two sites on the Algerian west coast; Ain Franine (AF) and Sidi Lakhdar (SL). The obtained concentrations revealed the presence of heterogeneous metal contents and showed that the most important concentrations were relatively detected in zinc, with values of the male gonads at the level of AF (16.39 ± 2.38 mg / kg PF) for winter and SL (4.65 ± 0.59mg / kg PF) for summer. The lowest zinc values were recorded on the integument for the two sites. The highest Cu values were recorded in spring on the integument of two groups of Holothuria tubulosa. Nickel concentrations showed a high value in the integuments in males (1.08 ±0.03mg / kgP.F) at AF during summer and at SL in spring (0.93 ± 0.02mg / kg PF). While they recorded the lowest values in winter for sea cucumbers of FA and in spring for those of SL for the same organ. The lead concentrations revealed high values on the integument with (1.77 ± 0.56 mg / kg PF) in winter for SL sea cucumbers and (1.36 ± 0.04 mg / kg PF) in summer for those from AF. Moreover, cadmium targeted the same organ as lead where high values were noticed on the integuments during fall for the two communities of sea cucumbers of the order of (0.51 ± 0.03 mg / kg PF) to AF and from (0.43 ± 0.01mg / kg PF) to SL. The analysis of the metal concentrations obtained revealed that, despite the difference in biotope, the two communities of Holothuria tubulosa did not present a significant difference (P> 0.005) for all the metals considered.
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Papers by dermeche saliha
contaminations of Cu, Cd, Pb, Zn, and Ni in the organs of Holothuria
tubulosa (Gmelin, 1791), at two sites on the Algerian west coast; Ain
Franine (AF) and Sidi Lakhdar (SL). The obtained concentrations revealed the presence of heterogeneous metal contents and showed that the most important concentrations were relatively detected in zinc, with values of the male gonads at the level of AF (16.39 ± 2.38 mg / kg PF) for winter and SL (4.65 ± 0.59mg / kg PF) for summer. The lowest zinc values were recorded on the integument for the two sites. The highest Cu values were recorded in spring on the integument of two groups of Holothuria tubulosa. Nickel concentrations showed a high value in the integuments in males (1.08 ±0.03mg / kgP.F) at AF during summer and at SL in spring (0.93 ± 0.02mg / kg PF). While they recorded the lowest values in winter for sea cucumbers of FA and in spring for those of SL for the same organ. The lead concentrations revealed high values on the integument with (1.77 ± 0.56 mg / kg PF) in winter for SL sea cucumbers and (1.36 ± 0.04 mg / kg PF) in summer for those from AF. Moreover, cadmium targeted the same organ as lead where high values were noticed on the integuments during fall for the two communities of sea cucumbers of the order of (0.51 ± 0.03 mg / kg PF)
to AF and from (0.43 ± 0.01mg / kg PF) to SL. The analysis of the metal
concentrations obtained revealed that, despite the difference in biotope, the two communities of Holothuria tubulosa did not present a significant
difference (P> 0.005) for all the metals considered.
contaminations of Cu, Cd, Pb, Zn, and Ni in the organs of Holothuria
tubulosa (Gmelin, 1791), at two sites on the Algerian west coast; Ain
Franine (AF) and Sidi Lakhdar (SL). The obtained concentrations revealed the presence of heterogeneous metal contents and showed that the most important concentrations were relatively detected in zinc, with values of the male gonads at the level of AF (16.39 ± 2.38 mg / kg PF) for winter and SL (4.65 ± 0.59mg / kg PF) for summer. The lowest zinc values were recorded on the integument for the two sites. The highest Cu values were recorded in spring on the integument of two groups of Holothuria tubulosa. Nickel concentrations showed a high value in the integuments in males (1.08 ±0.03mg / kgP.F) at AF during summer and at SL in spring (0.93 ± 0.02mg / kg PF). While they recorded the lowest values in winter for sea cucumbers of FA and in spring for those of SL for the same organ. The lead concentrations revealed high values on the integument with (1.77 ± 0.56 mg / kg PF) in winter for SL sea cucumbers and (1.36 ± 0.04 mg / kg PF) in summer for those from AF. Moreover, cadmium targeted the same organ as lead where high values were noticed on the integuments during fall for the two communities of sea cucumbers of the order of (0.51 ± 0.03 mg / kg PF)
to AF and from (0.43 ± 0.01mg / kg PF) to SL. The analysis of the metal
concentrations obtained revealed that, despite the difference in biotope, the two communities of Holothuria tubulosa did not present a significant
difference (P> 0.005) for all the metals considered.