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Studija ocjenjuje usvajanje poboljšanih tehnologija akvakulture među uzgajivačima ribe u Lagosu u Nigeriji. Ukupno 90 uzgajivača ribe uzorkovano je kroz višestupanjske tehnike uzorkovanja. Validirani i predtestirani raspored intervjua je korišten za dobivanje primarnih informacija od uzgajivača ribe. Dobiveni podaci obrađeni su deskriptivnom i inferencijalnom statistikom. Dobiveni rezultati pokazuju da je više od pola uzgajivača ribe dobilo kreditne pogodnosti od kooperativnih društava te oko jedne trećine od Esusa, dok su gotovo svi prodavali svoje ribe kao dimljene. Veći udio uzgajivača ribe su bili svjesni, pokušali su i usvojili većinu poboljšanih tehnologija akvakulture, dok su neki uzgajivači ribe obustavili većinu ranije usvojenih tehnologija. Ova studija također ukazuje da su uzgajivači riba imali pozitivan stav prema usvajanju poboljšanih tehnologija akvakulture. Rezultati regresijske analize su pokazali da su sekundarno zanimanje uzgajivača ribe (β = -0,324, p, The study assessed the adoption of improved aquaculture technologies among fish farmers in Lagos State, Nigeria. A total of 90 fish farmers were sampled through the multistage sampling technique. A validated and pretested interview schedule was used to obtain primary information from the fish farmers. Obtained data were analyzed using descriptive and inferential statistics. Results obtained revealed that more than half and about one-third of the fish farmers sourced credit facilities from cooperative societies and Esusu, respectively, while almost all sold their fishes as smoked fish. Higher proportions of the fish farmers were aware, tried and adopted most of the improved aquaculture technologies with some of the fish farmers also discontinuing most of the previously adopted technologies. The findings of the study also reported that the fish farmers had positive attitude towards the adoption of improved aquaculture technologies. Results of regression analysis revealed that secondary occupation of the fish farmers (β=-0.324, p

The multivariate relationship between fish species and environmental variables was studied at three landing sites along the coast of the Gulf of Guinea, Southwest Nigeria. Fish species were sampled for abundance once per month per site for twenty-four months and eight environmental variables were measured. Five fish species (Sardinella maderensis, Ilisha africana, Pentanemus quinquarius, Chloroscombrus chrysurus, Ethmalosa fimbrata and Pterioscion peli) were observed to be very abundant, which contributed 77.6% of the total abundance. Fish species composition depicted tropical waters fishery with few dominant species having large number of individuals. Dendogram of cluster analysis revealed five fish communities. Canonical correspondence analysis was used to elucidate the relationships between assemblages of fish species and their environment. S. maderensis, the most abundant species, was observed to be influenced by pH, total dissolved solids (TDS) and nitrate. Clustering and ordination techniques provided very similar results based on the fish species composition. Water pH, total dissolved solids (TDS), nitrate and conductivity were shown to be most influencing environmental variables in decreasing order of vector projections, influencing fish assemblages in marine coastal waters of the Gulf of Guinea, Southwest, Nigeria., Ovim istraživanjem proučavan je multivarijatni odnos vrsta riba i varijabli iz okoline na tri mjesta duž obale Gvinejskog zaljeva u jugozapadnoj Nigeriji. Uzorci riba prikupljani su jednom mjesečno na odabranim lokacijama tijekom 24 mjeseca, pri čemu je mjereno i osam varijabli iz okoline. Najčešće vrste riba, sa 77,6 % udjela ukupne riblje populacije, bile su: Sardinella maderensis, Ilisha africana, Pentanemus quinquarius, Chloroscombrus chrysurus, Ethmalosa fimbrata i Pterioscion peli. Sastav ribljih vrsta prikazuje ulov u tropskim vodama s nekoliko dominantnih vrsta koje imaju veliki broj jedinki.. Dendrogram klaster analize prikazuje pet ribljih zajednica. Kanonička korelacijska analiza korištena je kako bi se razjasnio odnos između sastava vrsta riba i njihove okoline. Utvrđen je vidljiv utjecaj pH, ukupnih otopljenih tvari (TDS) i nitrata na S. maderensis, najbrojniju riblju vrstu. Tehnike grupiranja i koordinacije dale su vrlo slične rezultate temeljene na sastavu ribljih vrsta. pH vrijednost vode, ukupne otopljene tvari (TDS), nitrati i provodljivost najutjecajnije su varijable okoline u opadajućem redoslijedu vektorske projekcije, a znatno utječu na riblji sastav u moru na obalama Gvinejskog zaljeva u jugozapadnoj Nigeriji.

This study was undertaken to investigate the relationship between poverty and the different fishers management practices being employed by fishermen in the exploitation and harnessing of the costal wetlands of Ondo State. Over 80% of the fisher-folks are by nature very poor and thus will more often than no `eat deep' into the fish resources at their disposal. The results of the study show that the most prevalent management practices were gillnetting, caste netting and seine-netting. These were found to be very versatile, durable and affordable. It reveals that those practices which posses the highest potentials for short-term income generation were more commonly used. The lowest direct cost of investment in engaging in any practice was in gill netting, while the highest was in the use of chemical and herbal poisons. The perceived ability of each practice to generate short-term income gains was highest for gill netting and followed by total draining. The least practice in the generation of short-term income gains was hooks and line, spears and closed season. The paper recommends among others the effective tackling of the poverty-related issues in the Nigeria's artisanal fishery sub-sector. [JEXT Vol.1(1) 2000: 54-62]