Potential to produce brown mussel integrated to a net-cage fish farm in a Mediterranean bay

Type Article
Date 2023-08
Language English
Author(s) Medhioub WalidORCID1, Challouf Rafika2, Laabir Mohamed3, Limayem Youness1, Bchir Sondes1, Slimeni Wissem1, El Amri Dorsaf1, Hamza Asma4, Mahfoudhi Mabrouka4, Rijal Leblad Benlahcen6, Néjib Medhioub Mohamed1, Abadie EricORCID5, Rolland Jean-LucORCID7, Salah Azaza Mohamed1
Affiliation(s) 1 : Laboratoire Aquaculture, Institut National des Sciences et Technologies de la Mer, Tunisie
2 : Laboratoire Biodiversité Marine, Institut National des Sciences et Technologies de la Mer, Monastir, Tunisie
3 : Université Montpellier, MARBEC IRD IFREMER CNRS, Montpellier, France
4 : Laboratoire Milieu Marin, Institut National des Sciences et Technologies de la Mer, Sfax, Tunisie
5 : IFREMER, Biodivenv, 79 route de pointe fort, 97231 Le Robert, France
6 : INRH (Moroccan Institute of Fisheries Research), Marine Environment Monitoring Laboratory, Tangier, Morocco
7 : MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, 87 Avenue Jean Monnet, 34200 Sète, France
Source Aquaculture Reports (2352-5134) (Elsevier BV), 2023-08 , Vol. 31 , P. 101674 (14p.)
DOI 10.1016/j.aqrep.2023.101674
Keyword(s) Brown mussel, growth performance, Potentially toxic microalgae, Microbiological contamination, Mediterranean bay

In this study, we investigated the potential exploitation of the brown mussel Perna perna (Linnaeus, 1758) in an aquaculture farm (Monastir Bay, Mediterranean Sea, Tunisia). The quality of seawater as well as performance indicators such as Condition Index, length, weight, growth and frequency distribution of the mussel were determined over an annual cycle; from July 2017 to August 2018. Interestingly, P. perna has an extended sexual cycle during the year with two main spawning periods, the first in spring and the second in autumn, when suspended matter and Chlorophyll a were at their maximum concentrations in seawater. Spat mussels and young mussels showed significant growth rates from 1 July 2017 to 31 October 2017. Adult mussels exhibited negative allometric growth and a modal size of 41 to 50 mm. Results showed that several potentially toxic microalgae species developed at low densities in this marine zone. By using Solid Phase Adsorption Toxins Tracker (SPATT); lipophilic toxins including Okadaic acid and yessotoxins were detected at low levels in seawater and may be involved in the positive LSTs (lipophilic shellfish toxins) mouse bioassays in P. perna during the autumn. No other toxins such as paralytic shellfish toxins or amnesic shellfish toxins nor pathogenic bacteria or viruses were detected in P. perna. Altogether, our results suggest that finfish farms in Monastir Bay could be suitable sites for farming P. perna.

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Medhioub Walid, Challouf Rafika, Laabir Mohamed, Limayem Youness, Bchir Sondes, Slimeni Wissem, El Amri Dorsaf, Hamza Asma, Mahfoudhi Mabrouka, Rijal Leblad Benlahcen, Néjib Medhioub Mohamed, Abadie Eric, Rolland Jean-Luc, Salah Azaza Mohamed (2023). Potential to produce brown mussel integrated to a net-cage fish farm in a Mediterranean bay. Aquaculture Reports, 31, 101674 (14p.). Publisher's official version : https://doi.org/10.1016/j.aqrep.2023.101674 , Open Access version : https://archimer.ifremer.fr/doc/00848/95990/