Hippocampus
Volume 1, Numéro 4, Pages 9-14
2025-07-27
Evaluation Of Response To Two Spawning Induction Methods Of Mytilus Galloprovincialis
Authors : Amina Kacimi Kacimi .
Abstract
Spawning induction in mollusks, particularly Mytilus galloprovincialis, is crucial for enhancing reproduction and larval production in aquaculture. This study aimed to compare the effectiveness of two spawning induction methods: thermal shock and chemical shock. A total of 90 adult mussels, with an average weight of 32.53 ± 14.46 g and an average length of 6.65 ± 1.1 cm, were collected from the "Cultmare" mussel (Tipaza province, Algeria, North Africa), in May 2024. The mussels were subjected to thermal shock by placing them in cold water (10-15°C) for 30 minutes, followed by hot water (25-30°C), repeated after 40 minutes. For chemical shock, 10 mussels were injected with 2 mL of a potassium chloride (KCl) solution, while others were immersed in dilute solutions of hydrogen peroxide (H2O2) and acetic acid (CH3COOH) for specified durations. The chemical parameters of the water were monitored, and the temperature was maintained within the specified ranges throughout the experiments. The results indicated that thermal shocks triggered a spawning response in 43.33% of the mussels, while chemical shocks resulted in a 33.33% response rate. Statistical analysis revealed significant differences in response rates between males and females, with males exhibiting a faster and more intense reaction to both stimuli. These findings suggest that while both methods can effectively induce spawning, the choice of method should be tailored to the specific reproductive goals and biological characteristics of Mytilus galloprovincialis populations.
Keywords
Mollusks ; Aquaculture ; Thermal shock ; Chemical shock ; Mussels
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