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  • 1
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    Variation in the physico-chemical features and phytoplankton of new Calabar river at Aluu, Rivers State, Nigeria. (2008)
    Details
    Publication Date: 2021-05-19
    Description: The physico-chemical features and phytoplankton community of the upper reaches of the New Calabar river at Aluu were studied at high and low water slacks for a period of 12 months. The water was acidic (pH 5.5 – 6.5) with low alkalinity (10 – 20mg CaCO3 L-1 and characteristically soft (total hardness ranging from 10 to 60mg CaCO3L-1). There was obvious seasonal flux in the silica level, with dry season having higher values than wet season. The phytoplankton was predominated by the diatoms, which constituted more than 85% of the total phytoplankton population. The predominant taxa were Melosira sp. Tabellaria spp. Surirella spp. and Navicula spp. The phytoplankton density was significantly higher during the dry season than rainy season (Czekanowski’s Coefficient.Cz = 0.332) but there was no significant difference between the high and low tide values (Cz = 0.66).
    Description: NIOMR
    Description: Published
    Keywords: Phytoplankton ; Physicochemical properties ; Physicochemical properties ; Phytoplankton
    Repository Name: AquaDocs
    Type: Report
    Format: 18
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  • 2
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    Population dynamics of periwinkle Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the Bonny Estuary, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23289 | 19325 | 2018-03-30 14:45:43 | 23289 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The growth, mortality and recruitment pattern of Tympanotonus fuscatus var fuscatus were investigated using shell length (SL) - frequency data obtained from the mangrove swamps of the Bonny River, population. Computer based software package FiSAT (FAO - ICLARM Fish Stock Assessment tool) were used for the analysis. Sampling was done between January to December, 2004. Results obtained showed relatively high growth, low mortality and recruitment pattern with two peaks annually.
    Description: Includes:- 2 tables.;1 fig.;11 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Bonny Estuary ; freshwater environment ; Population dynamics ; Growth rate ; Mortality ; Recruitment
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 46-49
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  • 3
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    Food and feeding habit of Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the mangrove swamps of the Bonny River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23324 | 19325 | 2018-04-06 16:00:32 | 23324 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the food and feeding habit of T. fuscatus var fuscatus from the mangrove swamps of the Bonny River, Niger Delta revealed that the species is a deposit feeder but fed more on algae and protozoa. The variation of food types with season were determined from the numerical and frequency of occurrence methods of food analysis. The algae were of Stephanodiscus, Cosanodiscus. Navicula and Nitzschia species, while the protozoa were Arecella arenaria, Pseudodileptus and Trinema species. Feeding actively occurred at low tides, this coincided with the presence of algae on the mud surface. No qualitative seasonal variation occurred as T. fuscatus var fuscatus fed basically on the primary diets at all seasons.
    Description: Includes:-1 table.;1 fig.;9 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Niger Delta ; freshwater environment ; Feeding behaviour ; Stomach content ; Food consumption ; Stomach ; Seasonal variations
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 19-21
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  • 4
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    Dominance shift of phytoplankton in relation to different organic fertilizer treatments in Clarias gariepinus culture (2021)
    In:  http://aquaticcommons.org/id/eprint/858 | 6 | 2011-09-29 21:30:18 | 858 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-03
    Keywords: Aquaculture ; Nigeria ; Clarias gariepinus ; Catfish
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 62-66
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