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  • 1
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    In:  http://aquaticcommons.org/id/eprint/4053 | 424 | 2011-09-29 16:28:31 | 4053 | Fisheries Society of Nigeria
    Publication Date: 2021-06-29
    Description: This study was carried out to assess consumers' acceptance of kilishi prepared from Labeo coubie and Hyperopisus bebe occidentalis in Sokoto. The organoleptic properties (texture, odour, taste and flavour) of kilishi in its fresh form and under storage for 16 weeks were determined. The mean scores for the organoleptic assessment (6.90 and 7.19 for kilishi of Labeo and Hyperopisus respectively) showed that fish kilishi was highly acceptable. Hyperopisus kilishi recorded slightly higher mean scores for the tested organoleptic properties. The declining pattern of the sensory assessment scores with length of storage indicated that the optimum storage period under the room temperature for kilishi made from the experimental fish species in the study area was 6-8 weeks. Further research on appropriate storage methods is desirable. However, preparation of fish kilishi could be explored as alternative preservation technique to reduce fish spoilage especially during the glut in supply and to diversify fish products
    Keywords: Fisheries ; Chemistry ; Nigeria ; fish utilization ; fishery products ; organoleptic properties ; processed fishery products ; Hyperopisus bebe occidentalis ; Labeo coubie
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 376-381
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  • 2
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    In:  http://aquaticcommons.org/id/eprint/4117 | 424 | 2011-09-29 16:33:01 | 4117 | Fisheries Society of Nigeria
    Publication Date: 2021-06-29
    Description: Three types of prototype (Lege) traps with different numbers of entrance valves were evaluated in River Rima, north western Nigeria. The traps contained 4,6 and 8 valves, tagged 4-V, 6-V and 8-V respectively. The experiment was carried out in a randomized complete block design with one factor each replicated three times. Data collected on fish diversity, number, biomass and sizes were subjected to descriptive statistics and analysis of variance. The results of the catch composition showed close diversity index of 0.86 for 6-V, 0.80 for 8-V and 0.60 for 4-V Lege traps. However, the number (41%) and biomass (48%) of fish caught in the 6-V Lege trap were significantly (P〈0.05) higher than those caught in the other traps. There was no definite trend in the sizes (length and girth) of fish caught in the traps. On the basis of species diversity, and the number and biomass of fish caught, the 6-V Lege showed preference for adoption than the other two traps. However, further studies are recommended on the appropriate mesh size net for the trap in line with the provisions of fisheries edicts
    Keywords: Fisheries ; Biology ; Nigeria ; River Rima ; catch composition ; fishing gear ; gear construction
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 802-808
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  • 3
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    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23232 | 19325 | 2018-03-18 13:49:50 | 23232 | Fisheries Society of Nigeria
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Protopterus annectens of the River Rima and Goronyo Dam in North Western Nigeria was studied. A total of one hundred and eighteen (118) fish samples were collected from October, 2001 to September, 2002 and the stomach contents were analyzed using frequency of occurrence method. The feeding adaptation with respect to mouth and related structures, gill rakers and dentition were examined. The gut length and fish length indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of GL TL relationships were highly significant (p〈0. 01). The main taxa of food substances found in the stomachs included substances of plant and animal origins, with overall frequency of 49. 1and 38.3% for the samples from River Rima and 27.2 and 60.3% for those from Goronyo Dam in the same order. The results of percentage occurrence of the food items in the dry season showed that animal substances in the juveniles (51.7%) and the adults (41.4%) were higher than the plant materials in the samples from the two water bodies. In the rainy season, the percentage occurrences of animal substances were higher in the adults (= 30cm) samples from Goronyo Dam than those samples from River Rima, while the same food items were absent in the juveniles (= 30cm) from the two water bodies. These feeding adaptive features indicate the roles of the species in their ecological niche and provide base line information that could be useful in satisfying their food requirement under culture condition. The diversity of food substances found in the stomach and their occurrence in the juveniles and adults varied with the water bodies and season.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food chains ; Food preferences
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 128-135
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  • 4
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    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23231 | 19325 | 2018-03-18 15:06:24 | 23231 | Fisheries Society of Nigeria
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Hyperopisus bebe occidentalis caught in River Rima and Goronyo Dam in North western Nigeria were investigated A total of four hundred and fifty four (454) fish samples were collected on monthly basis from October, 2001 to September, 2002 are examined for feeding adaptations and gizzard content. The mouth is terminal in studied species. Two types of teeth were identified viz; cardiform and molariform. The gill rakers were 0.09~c 0.04cm in length with 0.010~ccm interspacing. The compartment of gut included gizzard-like stomach. The gut length and fish length (GL-TL) indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of the gut length fish length relationships were significant (p〈 0.05). The main taxa of food items identified included substances of plant and animal origins, with overall percentage occurrence of 69.8 and 20.7% for samples from River Rima and 59.1 and 20. 0% for those from Goronyo Dam in the same order. During the dry season, the frequency occurrence of plant substances were higher in the juveniles (〈30cm, TL) 70.9% and adults (=30cm, TL) 64.7% in River Rima than the values obtained in samples from Goronyo Dam. Their occurrences in Goronyo Dam were fairly higher in the adults (62.9%) than in the juveniles (53.6%) during the same season. The results of this study showed higher occurrence of plant materials in juveniles than in the adults from the two water bodies during the rainy season. Contrary to this, low frequency occurrence of substances of animal in the juvenile samples from River Rima (15.2%) and Goronyo Dam (17.1%) were obtained in adult samples, the occurrence of animal substances were more than those of plants from the two seasons and water body. The feeding adaptive features revealed the ecological roles of the fish species that could be useful in satisfying their food requirements in culture systems and for teaching and further research.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe occidentalis ; Nigeria ; Rim R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food preferences
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 120-127
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  • 5
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    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23293 | 19325 | 2018-03-30 14:52:29 | 23293 | Fisheries Society of Nigeria
    Publication Date: 2021-07-13
    Description: Ninety five (95) specimena of P. Annectens (Owen) were caught from Goronyo Dam (26) and River Rima (69). The result revealed flesh yield of 44.29~c2.52 in August to 49.46~c to 5.68 in October which was not significant in samples from River Rima. The flesh yield from samples in Goronyo Dam ranged from 46-95~c2.43 in June to 54.28~c3.36 in September indicating significant difference between the months. The waste yield also varied significantly in samples from Goronyo Dam 45.72~c3.36 in September to 53.05~c 2.43 in June. However the results indicated non-significance (P〉0.05) difference in samples from River Rima with a range of 50.54~c6.68 in October to 55.71~c2.55 in August. Similarly the flesh yields were found to be higher during the dry season than in the rainy season. The sample specimens were found to contain enough flesh thereby creating potentialities to caning industries.
    Description: Includes:- 10 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Yield ; Yield predictions ; Population dynamics
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 67-70
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  • 6
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    In:  http://aquaticcommons.org/id/eprint/4047 | 424 | 2011-09-29 16:27:58 | 4047 | Fisheries Society of Nigeria
    Publication Date: 2021-06-29
    Description: The fabrication and operational techniques of Malian and Ndurutu traps mostly used by the fishermen in River Rima in north western Nigeria were evaluated through structured questionnaire and measurement of samples of the Data collected were analyzed using descriptive statistics. There was no standard in the dimensions of either of the traps. The traps were made of locally sourced materials, except the synthetic net of the Malian trap. About 81 and 80% of the respondents fabricated their Malian and Ndurutu traps, respectively. The major problems encountered in the structure and operation of the Malian trap included projection above water, stealing of catches and trap, and trapping of small sized fishes as indicated by 61.9, 47.6 and 28.6% of the respondents, respectively. In the case of the Ndurutu trap, 72.0, 48.0, 12.0 and 8.0% of the respondents respectively indicated poor durability, single entrance valve, destruction by cattle and instability in water, as the major problems encountered. As improvement measures for the Malian trap, the respondents suggested increase in number and size of valve (81.0%), horizontal positioning (57.1%) and square shape (47.6%) while 52.0% each suggested increase in number of entrance valve and netting of Ndurutu trap. The fishermen demonstrated ingenuity in the fabrication and operation of the traps, but they failed to initiate the required improvement. It is important to critically examine the designs, materials, costs and limitations of the traps and the suggestions of the fishermen, as basis for improvement on the technology of the traps
    Keywords: Fisheries ; Nigeria ; River Rima ; efficiency ; fishing gear ; surveys
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 341-348
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  • 7
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    In:  http://aquaticcommons.org/id/eprint/4048 | 424 | 2011-09-29 16:28:01 | 4048 | Fisheries Society of Nigeria
    Publication Date: 2021-06-29
    Description: Based on the findings and diagnostic survey, a new fishing trap, christened Lege trap was designed and fabricated, and the performance evaluated. The 8-valve Lege trap was assessed concurrently with Malian and Ndurutu traps by the fishermen in the study area. The experiment was conducted in a randomized complete block design with one factor each replicated three times. Data collected on fish diversity number, biomass and size were subjected to descriptive statistics and analysis of variance. The results showed that 22 fish species belonging to thirteen families were caught. The prototype (Lege) trap recorded higher species diversity index (0.90) than the Malian (0.50) and Ndurutu (0.50) traps. The Lege trap also accounted for the largest number (55%) and biomass (63%) of fish caught which was significantly (P〈0.05) higher than those of the Malian and Nduutu traps were. The mean length (15.03~c5.70cm), weight (60.43~c48.61g) and girth (4.77~c1.65cm) of fishes caught in the Lege trap were also significantly (P0.05) higher than those caught in the other two traps. These results demonstrated better performance of the new trap than the two conventional traps, even though the sizes of some of the fish species caught in all the traps were below those allowed by the Sokoto State Fisheries Edict where the study was conducted. Therefore, since it is desirable to develop conservation-oriented trap at a least cost, it is necessary to research further on the number of valves and mesh size of the new trap
    Keywords: Fisheries ; Biology ; Nigeria ; River Rima ; evaluation ; fishing gear ; surveys ; trap fishing ; trap nets
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 349-364
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/4050 | 424 | 2011-09-29 16:28:03 | 4050 | Fisheries Society of Nigeria
    Publication Date: 2021-06-29
    Description: Three types of prototype (Lege) traps with different numbers of entrance valves were evaluated in River Rima, north western Nigeria. The traps contained 4,6 and 8 valves, tagged 4-V, 6-V and 8-V respectively. The experiment was carried out in a randomized complete block design with one factor each replicated three times. Data collected on fish diversity, number biomass and sizes were subjected to descriptive statistics and analysis of variance. The results of the catch composition showed close diversity index of 0.86 for 6-V, 0.80 for 8-V and 0.60 for 4-V Lege traps. However, the number (41%) and biomass 48%) of fish caught in the 6-V Lege trap were significantly (P0.05) higher than those caught in the other traps. There was no definite trend in the sizes (length and girth) of fish caught in the traps. On the basis of species diversity, and the number and biomass of fish caught, the 6-V Lege showed preference for adoption than the other two traps. However, further studies are recommended on the appropriate mesh size net for the trap in line with the provisions of fisheries edicts
    Keywords: Fisheries ; Biology ; Nigeria ; River Rima ; catch composition ; fishing gear ; gear construction
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 365-375
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