Contribution to the assessment of the bioecological parameters of Razor clam Solen marginatus on the Moroccan Atlantic coast
Year: 2018
Type: article
Abstract: Event Abstract Back to Event Contribution to the assessment of the bioecological parameters of Razor clam Solen marginatus on the Moroccan Atlantic coast IBTISSAM DOUKILO1, 2, 3*, Oum Keltoum BELHSEN2, 3, Mohamed ID HALLA3, Khalid MANCHIH2, Brahim MOUTTAKI2, 3, Kaoutar HIMMI4 and Ahmed ERRHIF1 1 University of Hassan II Casablanca, Biology department, Morocco 2 Institut National de Recherche Halieutique (INRH), Fisheries department, Morocco 3 Institut National de Recherche Halieutique (INRH), Aquaculture department, Morocco 4 Mohammed V University, Biology department, Morocco Razor clam Solen marginatus is known for its economic value worldwide. Overexploitation of this resource can affect its distribution and ecology. For these reasons, a study of the bio-ecology of Solen marginatus was initiated in December 2017 in Oualidia lagoon on the Moroccan Atlantic Coast. The aim of this study is to ensure a better management of its fishery and establish the link between growth and reproduction with physicochemical parameters. For that, a monthly sampling of clams (71-110mm) is carried out as well as temperature, pH and salinity. At each sampling, 60 individuals were collected, 30 were used for condition index (CI) and 30 for histological analysis. In the laboratory, the clams are analyzed to determine the different biological parameters (length, height, thickness, total wet weight) followed by a dissection to determine the wet weight of the shells and flesh. The sex is determined by macroscopic observation, and confirmed by a gonad smear. Among the 300 individuals sampled during the period from December 2017 to April 2018, 33% were females, 44% were males and 23% were of undetermined sex. Starting from January 2018, sex determination was easy in specimens with a developed gonad in both sexes because the color of male gonad is creamy beige and the color of female gonad is brown. The sex ratio was well balanced in each months (no significant deviation between the sexes, chi-square = 0.012, P> 0.05). Preliminary results of this study showed no sex differentiation during December 2017 and a low value of condition index (38.48 ± 5.19). The highest value of condition index was recorded in February 2018 (54.58 ± 7.44). In April, when the temperature is 22°C, there is a decrease in the CI (42.97±6.64). The variations in the CI during the study are significant (ANOVA, P <0.05) and correlated with changes in temperature. However, no correlation was recorded between condition index, salinity and pH. In terms of growth, the cubic allometry (length/dry weight flesh) of the population showed an isometry in December 2017 and January 2018 (b = 3). On the other hand, we are witnessing a negative allometry, which is increasing more and more from February to April 2018 (b <3). Starting from February, higher negative allometry coincides with the decrease in the CI, this indicates the start of gonadal activity in the population initiated by a rise in temperature. Keywords: Solen marginatus, condition index, reproductive cycle, Sex ratio, Bioecology, Stock management Conference: IMMR'18 | International Meeting on Marine Research 2018, Peniche, Portugal, 5 Jul - 6 Jul, 2018. Presentation Type: Poster Presentation Topic: Biodiversity, Conservation and Coastal Management Citation: DOUKILO I, BELHSEN O, ID HALLA M, MANCHIH K, MOUTTAKI B, HIMMI K and ERRHIF A (2019). Contribution to the assessment of the bioecological parameters of Razor clam Solen marginatus on the Moroccan Atlantic coast. Front. Mar. Sci. Conference Abstract: IMMR'18 | International Meeting on Marine Research 2018. doi: 10.3389/conf.FMARS.2018.06.00150 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 30 May 2018; Published Online: 07 Jan 2019. * Correspondence: Miss. IBTISSAM DOUKILO, University of Hassan II Casablanca, Biology department, Casablanca, Morocco, [email protected] Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers IBTISSAM DOUKILO Oum Keltoum BELHSEN Mohamed ID HALLA Khalid MANCHIH Brahim MOUTTAKI Kaoutar HIMMI Ahmed ERRHIF Google IBTISSAM DOUKILO Oum Keltoum BELHSEN Mohamed ID HALLA Khalid MANCHIH Brahim MOUTTAKI Kaoutar HIMMI Ahmed ERRHIF Google Scholar IBTISSAM DOUKILO Oum Keltoum BELHSEN Mohamed ID HALLA Khalid MANCHIH Brahim MOUTTAKI Kaoutar HIMMI Ahmed ERRHIF PubMed IBTISSAM DOUKILO Oum Keltoum BELHSEN Mohamed ID HALLA Khalid MANCHIH Brahim MOUTTAKI Kaoutar HIMMI Ahmed ERRHIF Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.
Source: Frontiers in Marine Science
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDG: Life below water
Open Access status: gold
Estimated APC paid: $3,801
OpenAlex ID: W2910458010