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Comparative study on reproductive biology of the Caspian Sea amphipod, Pontogammarus maeoticus in brakish and freshwater
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Hamideh Tahmasebi Malekrodi    , Nader Shabanipour |
| Guilan University , nshabanipour@yahoo.com |
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Abstract: (842 Views) |
Background and Objectives: Caspian Amphipod is vivacious and very flexible in maintenance and is suitable for reproduction and breeding in different environments, especially fresh water. In the present study, samples (Pontogammarus maeoticus) were collected from the Caspian Sea coast (Kiashahr port), then transferred to the laboratory and adapted to the laboratory environment and fresh water in 14 days. male and female samples were identified by studying the animal's behavior. They were treated and studied separately, from birth to preparation for reproduction in three generations, in brackish (12 ppt) and fresh water. During the experiment, temperature was constant (25±1ᵒC), pH was 7.8 and the lighting period was according to the daily natural pattern (14/10 light/dark) and feeding was once a day.
Methods: Data analysis was done using SPSS 26 and Excel 2016 software. The data normality was evaluated by Kolmogorov–Smirnov test. ANOVA test, Tukey’s test was also used to compare results.
Findings: Reproduction was successful in both environments, but copulation time, oocytes and brood production were different. Preparation for reproduction and copulation takes longer and the number of broods are less compared in freshwater to brackish water. It seems the effective factors in the reproduction difference depended water solutes and type of nutrition. In the present study, the possibility of propagation and maintenance of Caspian Sea Pontogammarus is possible and recommended in fresh water.
Conclusion: Mass production of Pontogamarus is feasible on a technical scale in fresh water. |
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| Keywords: Reproduction, Mass production, Three generations, Amphipod |
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Full-Text [PDF 1696 kb]
(340 Downloads)
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Type of Study: Applied Article |
Subject:
Marine Biology
Received: 2022/07/19 | Revised: 2024/02/29 | Accepted: 2023/06/5 | ePublished: 2023/09/10
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