Influence de la salinité sur la structure des branchies et l’ultrastructure des ionocytes Chez le tilapia &lt;i&gt;Sarotherodon melanotheron heudelotii&lt;/i&gt; provenant d'un estuaire hypersalé (Saloum, Sénégal).

Ouattara, Nahoua Issa; Ouattara, Siaka; Bamba, Yacouba; Yao, K. B.

doi:10.4314/jab.v79i1.5

Cited by 3 publications

(3 citation statements)

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“…The high level of activity the Na + /K + -ATPase in EM and especially in EHS suggests an effective response of the Na + /K + -ATPase to changes in salinity. This effectiveness of adaptation is measured not only by the activity of the enzyme but also by the modification ultrastructure of gill monocytes, the size and the number of monocytes, as well as the localization of transmembrane proteins 6,16 .…”

Section: Discussionmentioning

confidence: 99%

“…Numerous studies have also been carried out on the adaptation to variations of salinities involving changes in the activity of the Na + /K + -ATPase in Fundulus heteroclitus and among Oreochromis mossambicus 14 . In contrast, in S. melanotheron, indicated as a species with high euryhalinity 6,15,16 , few studies have been devoted to the analysis of the activity of the Na + /K + -ATPase during changes in salinity.…”

Section: Introductionmentioning

confidence: 99%

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The effect of the variation in salinity on the activity of the Na+/K+ - ATPase pump in tilapia Sarotherodon melanotheron

2018

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The goal of this study was to investigate the effect of salinity on the activity of the main transmembrane protein involved in osmoregulation in the gills of tilapia Sarotherodon melanotheron heudelotii from a hypersalé estuary (Saloum, Senegal). In a controlled environment, juveniles of S. m. heudelotii initially high TO 0.3 PSU in fresh water (ED) have been divided into two groups, a control group maintained in ED and a direct transfer of the ed to 35 psu in sea water (EM) has been performed on the other group. A portion of the fish in EM have then been acclimated to waters hypersaline (EHS) by a gradual increase of 7 psu/day up to 70 (EHS70) and 90 psu (EHS90). The activity of the enzyme was measured by the determination of the amount of inorganic phosphate and proteins released after 24, 72, 240 and 720 hours of exposure to different salinities. Between the ED and the EM, the activity of the pump has increased slightly but significantly. Of the EM to the ESH70 and the EHS90, the activity of the Na + /K +-ATPase has strongly increased. This continual increase significant and of the activity of the enzyme with the increase in salinity indicates an effective adaptation of S. melanotheron face to changes in salinity. The strong increase in the activity to high salinities compared to low salinities suggests a nuance in the osmoregulatory mechanisms between these two ranges of salinities in this fish.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of the variation in salinity on the activity of the Na+/K+ - ATPase pump in tilapia Sarotherodon melanotheron

2018

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“…Despite of its potential for aquaculture in freshwaters, O. niloticus does not tolerate high salinity waters [10] . So, S. m. melanotheron could be a good candidate for the aquaculture in the areas where freshwaters are scarce [11] . For a successful culture operation of a fish, the knowledge of some biological parameters including its growth and wellbeing are required [12] .…”

Section: Introductionmentioning

confidence: 99%

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2022

Int. J. Fish. Aquat. Stud.

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343 specimens of Sarotherodon melanotheron melanotheron are sampled from March 2017 to February 2018 with carp nets. They are sexed, weighed and measured. This operation made it possible to obtain size distribution frequency, allometric coefficient (b) and condition factor (k) modal class is [17.78-19.03] for each of the two sexes in sector VI. In the females of Ayame 1 artificial lake and Aby lagoon, modal class is [19.04-20.29] while in the males it is [20.30-21.55]. Only in lagoon males, cases of positive and isometric allometric growth appeared. Positive allometric growth is obtained in males during short dry season (b=3.23) and short rainy season (b=3.07) in Aby lagoon. In sector VI, males of the flood season had a positive allometric growth (b=3.04) while it was isometric in rainy season (b=2.99). As for condition factor, it was greater than 1. In conclusion, species adapts to any environment but with growth favorable to weight in males in lagoon.

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2016

Tarpons

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Influence de la salinité sur la structure des branchies et l’ultrastructure des ionocytes Chez le tilapia <i>Sarotherodon melanotheron heudelotii</i> provenant d'un estuaire hypersalé (Saloum, Sénégal).

Abstract: Influence de la salinité sur la structure des branchies et l'ultrastructure des ionocytes chez le tilapia provenant d'un estuaire hypersalé (Sénégal).

Cited by 3 publications

References 12 publications

The effect of the variation in salinity on the activity of the Na+/K+ - ATPase pump in tilapia Sarotherodon melanotheron

The effect of the variation in salinity on the activity of the Na+/K+ - ATPase pump in tilapia Sarotherodon melanotheron

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