Water

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Browsing Water by Author "Adamba, Stephanie Wangare Kamau"

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  • Publication
    Publication
    Parasite Communities of Oreochromis niloticus baringoensis (Trewavas, 1983) in Relation to Selected Water Quality Parameters in the Hot Springs of Lorwai Swamp and Lake Baringo, Kenya
    (Springer Nature, 2020-02-19) Adamba, Stephanie Wangare Kamau; Otachi, Elick Onyango; Ong’ondo, Geoffrey Odhiambo
    PurposeParasite infections may lead to mortalities in fish; therefore, destabilizing the biodiversity and ecosystem functions. Swamps such as the Lorwai Swamp are important water sources, and information on the parasite species infecting Oreochromis nilotocus baringoensis in the hot springs of Lorwai Swamp which have a distinct genetic makeup from their counterparts in Lake Baringo is lacking. The purpose of this study was to provide a knowledge base on the parasite species infecting O. niloticus baringoensis in these springs, facilitate their comparison with those in Lake Baringo and determine their relationship with selected water quality parameters.Methods347 fish were collected and standard parasitological procedures were used to examine the presence of parasites. Physico-chemical parameters were measured in situ and water samples were collected for chlorophyll-a determination and nutrient analyses in the laboratory using standard methods. Relationship between parasitic infections and selected water quality parameters was determined by PCA using SPSS version 22.ResultsTwo parasite species were common in all sites: Cichlidogyrus sclerosus and Clinostomum sp. Some parasites correlated positively with some parameters; Amirthalingamia macracantha and Contracaecum sp. with nitrogen compounds. Others like Clinostomum sp. and Tylodelphys sp. correlated negatively with dissolved oxygen.ConclusionResults from this study showed that there were both positive and negative relationships between some water quality parameters and the prevalence of recovered parasites. O. niloticus baringoensis from Lake Baringo also recorded high parasite prevalence and this calls for sensitization of the public on the risks that may arise from the consumption of undercooked infected fish.
  • Publication
    Publication
    Some aspects of Oreochromis niloticus baringoensis (Trewavas, 1983) fishery assessment and influence of selected water quality parameters in the hot springs of Lorwai Swamp, Baringo, Kenya
    (Egerton University, 2019-12-05) Adamba, Stephanie Wangare Kamau
    Water quality has been documented to affect the biology and well-being of fish. This study therefore investigated some aspects of Oreochromis niloticus baringoensis (Trewavas, 1983) fishery assessment and the influence of selected water quality parameters in two hot springs draining into Lorwai Swamp; Lake Bogoria Spa spring and Chelaba spring between the months of July and August, 2018. A total of 445 fish were collected; 244 from Lake Bogoria Spa spring and 201 from Chelaba spring using a seine net. Length Weight Relationship (LWR) was determined using Le Cren’s equation; W=aTLb and Fulton’s condition factor (k) determined using Ricker’s equation; 100W/L3. LWR results indicated an isometric growth for fish from both springs. The mean (± SD) k values for fish in Lake Bogoria Spa spring were 2.02±0.25 for the males, 2.02±0.27 for the females and 2.00±0.26 for both sexes. In Chelaba spring, the mean k values were 2.03±0.21 for the males, 1.97±0.25 for the females and 2.00±0.23 for both sexes. These values indicated that the fish in these hot springs are in a very good condition and healthy status with k values above 1. Some of the selected water quality parameters indicated a positive correlation with the length, weight and Fulton’s condition factor of O. n. baringoensis in the two hot springs.