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Jawad, Laith A.; Gnohossou, Pierre; Toussou, Ayoko G.; Ligas, Alessandro

doi:10.4194/1303-2712-v17_1_24

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…In this study, we detected the spatial differences in relationships between asteriscus descriptors and body length of C. gibelio. Similar observations have also been reported for many fish species (Tombari et al, 2011;Bostancı et al, 2017;Jawad et al, 2017;Saygın et al, 2017;Nguyen and Dinh, 2020;Dinh et al, 2021). These variations may mainly be due to differences in the abiotic factors (e.g., temperature, pH, salinity, diet, etc.)…”

Section: Discussionsupporting

confidence: 85%

Spatial variation in relationships of otolith measurements with body length of Prussian carp, Carassius gibelio (Bloch, 1782) collected from four lentic habitats in Samsun Province, Türkiye

Yılmaz¹,

Akbay²,

Özpiçak³

et al. 2022

EgeJFAS

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This study aimed to disclose the spatial variability in the lagenar otolith (asteriscus) dimensions-total length relationships generated for four Prussian carp, Carassius gibelio (Bloch, 1782) populations (Altınkaya Dam Lake, Bafra Fish Lakes, Lake Ladik and Lake Simenit) in Samsun Province, Türkiye. Relationship between length and weight of the fish was also described for each population. Samples were obtained from commercial fishermen in different periods between February 2017 and March 2018. The length, height, and weight of each otolith were determined. A non-linear function was used to define allometric relationships between asteriscus measurements and body size. The slopes of the regressions acquired for the right and left otoliths at each sampling site did not show any significant difference. All of the relationships were found to be statistically significant (P<0.001). The r2 values ranged from 0.61 to 0.95, and the mean values of the percent prediction error varied from 3.10 to 7.45. The ANCOVA test determined significant spatial differences in regression slopes for the three otolith variables. Our findings revealed that otolith development reflected somatic growth, but this varied by sampling area.

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Section: Discussionsupporting

confidence: 85%

Spatial variation in relationships of otolith measurements with body length of Prussian carp, Carassius gibelio (Bloch, 1782) collected from four lentic habitats in Samsun Province, Türkiye

Yılmaz¹,

Akbay²,

Özpiçak³

et al. 2022

EgeJFAS

View full text Add to dashboard Cite

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Assessment of cyanotoxins in water and fish in an African freshwater lagoon (Lagoon Aghien, Ivory Coast) and the application of WHO guidelines

Yao,

Ahoutou,

Olokotum

et al. 2023

Environ Sci Pollut Res

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In comparison with northern countries, limited data are available on the occurrence and potential toxicity of cyanobacterial blooms in lakes and ponds in Sub-Saharan countries. With the aim of enhancing our knowledge on cyanobacteria and their toxins in Africa, we performed a 17-month monitoring of a freshwater ecosystem, Lagoon Aghien (Ivory Coast), which is used for multiple practices by riverine populations and for drinking water production in Abidjan city. The richness and diversity of the cyanobacterial community were high and displayed few variations during the entire survey. The monthly average abundances ranged from 4.1x10 4 cell mL − 1 to 1.8x10 5 cell mL − 1 , with higher abundances recorded during the dry seasons. Among the ve cyanotoxin families analyzed, only microcystins (MC) were detected with concentrations ranging from 0 to 0.364 µg L − 1 in phytoplankton cells, from 32 to 1,092 µg kg − 1 fresh weight of sh intestines and from 33 to 383 µg kg − 1 in sh livers. Even if the MC concentrations in water and sh are low, usually below the thresholds de ned in WHO guidelines, these data raise the issue of the relevance of these WHO guidelines for Sub-Saharan Africa, where local populations are exposed throughout the year to these toxins in multiple ways.

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Assessment of cyanotoxins in water and fish in an African freshwater lagoon (Lagoon Aghien, Ivory Coast) and the application of WHO guidelines

Yao

Ahoutou

Olokotum³

et al. 2023

Preprint

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In comparison with northern countries, limited data are available on the occurrence and potential toxicity of cyanobacterial blooms in lakes and ponds in Sub-Saharan countries. With the aim of enhancing our knowledge on cyanobacteria and their toxins in Africa, we performed a 17-month monitoring of a freshwater ecosystem, Lagoon Aghien (Ivory Coast), which is used for multiple practices by riverine populations and for drinking water production in Abidjan city. The richness and diversity of the cyanobacterial community were high and displayed few variations during the entire survey. The monthly average abundances ranged from 4.1x104 cell mL− 1 to 1.8x105 cell mL− 1, with higher abundances recorded during the dry seasons. Among the five cyanotoxin families analyzed, only microcystins (MC) were detected with concentrations ranging from 0 to 0.364 µg L− 1 in phytoplankton cells, from 32 to 1,092 µg kg− 1 fresh weight of fish intestines and from 33 to 383 µg kg− 1 in fish livers. Even if the MC concentrations in water and fish are low, usually below the thresholds defined in WHO guidelines, these data raise the issue of the relevance of these WHO guidelines for Sub-Saharan Africa, where local populations are exposed throughout the year to these toxins in multiple ways.

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Cited by 3 publications

References 18 publications

Spatial variation in relationships of otolith measurements with body length of Prussian carp, Carassius gibelio (Bloch, 1782) collected from four lentic habitats in Samsun Province, Türkiye

Spatial variation in relationships of otolith measurements with body length of Prussian carp, Carassius gibelio (Bloch, 1782) collected from four lentic habitats in Samsun Province, Türkiye

Assessment of cyanotoxins in water and fish in an African freshwater lagoon (Lagoon Aghien, Ivory Coast) and the application of WHO guidelines

Assessment of cyanotoxins in water and fish in an African freshwater lagoon (Lagoon Aghien, Ivory Coast) and the application of WHO guidelines

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