Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8886136 | Journal of Sea Research | 2018 | 9 Pages |
Abstract
Reproductive traits of Paracartia grani [percentage of spawning females, egg production rate (EPR), and hatching success (HS)] were investigated for the first time at high salinities (39-121 psu) to examine the impact of such a particular situation. The study was done in two hypersaline ponds [A1 (39-46 psu) and C31 (70-121 psu)] in Sfax Solar Saltern, central-eastern coast of Tunisia. These ponds also differed in terms of the composition and concentrations of nutritional parameters. The EPR differed significantly between the ponds (ANOVA, F = 29.45, p < 0.001). In pond A1, EPR varied between 12.7 ± 1.3 eggs femaleâ 1 dayâ 1 (7 December 2009) and 14 ± 1 eggs femaleâ 1 dayâ 1 (19 January 2010) with an average of 13.3 ± 0.44 eggs femaleâ 1 dayâ 1. HS after 48 h of incubation were significantly higher than those after 24 h. The mean values of HS after 48 h were 42.72 ± 2.58% at pond A1 and 41.67 ± 3.92% at pond C31. The two peaks of HS (after 48 h) were observed at 15 °C in pond A1 (21 December 2009, 45.18% nauplii eggsâ 1) and in C31 (4 January 2010, 48.78%) at the same temperature. This study confirms that a broad salinity tolerance allows P. grani to settle itself in environments, which are normally hostile to the development of other Acartiidae.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
Neila Annabi-Trabelsi, Rayda Kobbi Rebai, Mohammad Ali, M.N.V. Subrahmanyam, Genuario Belmonte, Habib Ayadi,