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MACROINVERTEBRATE DIVERSITY AND WATER QUALITY PATTERNS OF A MUNICIPAL STREAM IN DOKO DISTRICT,NIGER STATE,NIGERIA

2026-05-01T16:08:58Z

Title: MACROINVERTEBRATE DIVERSITY AND WATER QUALITY PATTERNS OF A MUNICIPAL STREAM IN DOKO DISTRICT,NIGER STATE,NIGERIA Authors: Umar ., B.L; Arimoro, F.O.; Adama, S.B.; Mohammed, Y.M.; Mohammed, A.Z.; Auta, Y.I. Abstract: The macroinvertebrate community of Emikpata stream, Doko district, Niger State, Nigeria were studied for a period of eight months using the modified kick sampling techniques. Four well marked stations were selected along the course of the stream designated as station 1, 2,3,4.Physicochemical parameters examined and readings were: Water temperature (23.0-27.0℃c),Depth (20.96-24.10cm), Flow velocity (0.29-0.30m/s), Dissolved oxygen (5.97-6.35mg/l),Biochemical oxygen demand (3.25-3.87mg/l), pH (6.0-6.32, Conductivity (49.1-110.0μS/cm),Total hardness (12.3-18.0mg/l), Total alkalinity (13.0-20.5mg/l), Chlorine (10.71-32.79mg/l),Nitrate (1.83-3.69mg/l), Phosphate (0.60-1.12mg/L), Sodium (7.24-9.02mg/l), Potassium (1.74-1.92mg/l). A total of 625 individuals from 28 species and 19 families of invertebrate were recorded. Significantly higher (P<0.005) macroinvertebrate abundance was recorded during the dry season as compares to the wet season. The Canonical Correspondence Analysis (CCA)result showed strong relationship between species abundance and measured environmental variables. Higher population of pollution tolerant macroinvertebrates groups and the poor water quality observed during the sampling period were indications of pollution stress occasioned by anthropogenic activities, decomposing domestic wastes and inorganic fertilizer washed into the stream from various nearby farms.

Identification of inland Freshwater Crab Species Niche and Biology: A case Study of Wasteland/Watershed Areas in Minna Environs

2026-05-01T15:23:52Z

Title: Identification of inland Freshwater Crab Species Niche and Biology: A case Study of Wasteland/Watershed Areas in Minna Environs Authors: Adama, Solomon Bake; Adamu, Zubairu Mohammed; Auta, Yohanna Iliya; Kinta, Mohammed; Olawuyi, Goodness Taiye Abstract: Survey Was carred out to identify burrows/holes of crabs in three (3) sites covering three hectares of watershed fieldl in the Main campus of Federal University of Technology, Minna. Two hundred and seven (207)burrows/holes of crabs were identified and 60 were dugged out to collect the crabs, 20 holes per site and 5 holes per sampling in each site, the length of burrows measured between 21.1-95 cm deep. Fifty five (55) crabs werecollected, the size of crab varies comprising of (nymphs (10), juvenile (10) and adult (35(fifteen male,twentyfemale)) indicating their reproductive and growth activities.The crabs were observed resting at the entrance ofthe burrows at dawn and dusk (6- 8am and 6-8pm). They withdrew to the hole quickly on perceiving any strangesound or movement, Standard chart was used to indentified species. Species identified is Afrithelphosa monodosa.Matured male were morphologically different from female, though the size and shape are the same, female haveslub on their antenna and posses porch at the anterior end. The matured females were gravid between April-May,with ovl small eggs of 10 cm diameter, orange in colour 10-20 eggs, clustered and stringed in each porch.The성브보s were laid in between May and June, in late June, female porches were emptied indicating the egg were laid.At commencement of rains, the eggs hatched under favourable conditions of more rainfall which provided moist and reduces temperature of the soil. The soil became water logged and burrows filled with water. The6emmencement of rainfall motivate them to bring out fresh soil cast outside the entrance of the burrows indicating there is a crab residing in that burrow in most cases. They feed vigorously during rainy season and hibernate in dry season. This study shows that crabs ecology and biology has the potentials of being cultured for their great nutritional and resourceful value.

Assessement of Fish Diversity in Relation to Fishing Gear Efficiency in Tagwai Lake Minna, Nigeria

2026-04-28T21:17:27Z

Title: Assessement of Fish Diversity in Relation to Fishing Gear Efficiency in Tagwai Lake Minna, Nigeria Authors: Chukwumeka, V.I.; Arimoro, F.O.; Auta, Y.I.; Olisadebe, O.J.; Erhabor, O.F. Abstract: The fish fauna of Tagwai Lake, Niger State, Nigeria was studied between February and August, 2016. The catch assessment was conducted at the landing site bi-weekly. Simple descriptive statistical tools such as simple percentage, frequency counts were used to analyze data obtained. A total of 53,442 fishes belonging to 7 families and 8 species were identified namely: Tilapia zill, Sarotherodon galilaeus, Alestes dentex, Auchenoglanis occidentalis, Clarias gariepinus, Mormyrus hasselquistii, Chrysicthys auratus, and Odaxothrissa mento. In terms of number, the Family: Clupeidae dominated the catch, and contributed 46.98% to the total catch. This was followed by the Cichlidae (43%), Alestidae (7.03%), Bagridae (2.08%), Clarotidae (7%), Claridae (0.42%), Mormyridae (0.00%). In terms of weight, the Cichlidae family was dominant (40.84%) for the total weight of fish caught. Cichlidae was also the most diversified family, represented by 2 species. The results showed the species abundance to be: Tilapia zillii (21.96), Sarotherodon galilaeus (21.04%), Odaxothrissa mento (46.98%), Alestes dentex (7.033%) and Auchenoglanis occidentalis (2.08%) in Tagwai Lake. Cast nets and gill nets were the most productive fishing gear with a total catch of 33, 555 and 7095 fishes respectively. Hook-and-line yielded no catch. The predominantly used gear between the month of July and August were Trap nets (Wire trap and the Gura Malian trap) The dominant species in cast net collections was T. galilaeus (32.60%) while that of Gill net was O. mento (59.48%). As a management strategy for this Lake, fishing activities should be monitored periodically to avoid the use of inappropriate gear for fishing.

SPATIAL MAPPING OF SHELFISH MARKETING IN KURE ULTRA MODERN MARKET, MINNA, NIGER STATE, NIGERIA

2026-03-26T08:01:18Z

Title: SPATIAL MAPPING OF SHELFISH MARKETING IN KURE ULTRA MODERN MARKET, MINNA, NIGER STATE, NIGERIA Authors: Ibrahim, S. U.; Adama, B. S.; Yakubu, U. P.; Mohammed, A. Abstract: Geographic Information System and Remote Sensing in the field of marketing is used in this study to open a wide range of its possible applications as the study assessed shellfish marketing in Kure Ultra Modern Market Minna, Niger State. The aim was to đevelop ddatabase of various shelfish product on sale at the market. The demographic profile, socio-economic characteristics of the marketers and problem associated with the marketing, 100 questionnaires were administered the analytical tool used were frequency distribution, tables, percentages and cost-benefit ratio. Returns from the interview and questionnaire and were used to retify the result which depicts that both male and female were engage in the business with female forming the malority group (55%) and 45% men. Maketing of the shellish was profitable which was contributed to realization of the significant of shelfish over meat. The high profit was recorded in raining (70%) while dry season sales were 30%. Species of shellfish marketed were crayfish, prawr, cockler, snail, shrimps and crabs. The study also shows that the shelfishes mostly sold are in fresh form (85%) while 15% are in dry form. Daily sales ranges from N1000 - N5000, majority of the respondents (75%) patronize low-cost transportation means between N500-N1000. In every enterprise there must be a problem; most of the problem encountered by the respondents were lack of constant supply from the landing site which is mostly marine environment, inadequate storage facility, poor transportation, high tax charges and theft; all these attribute data and the co-ordinate of the selling point at the market were put into ArcGIS environment. Base on the findings, recommendations were profiled to the government and database kept for references.