scholarly journals Comparing Dermestes maculatus (DeGeer) Infestation of Cured Tropical Freshwater Fishes [Oreochromis niloticus (Linnaeus) and Clarias gariepinus (Burchell)]

2014 ◽  
Vol 3 (5) ◽  
pp. 434
Author(s):  
Davies Ibienebo Chris
Keyword(s):  
Oreochromis Niloticus ◽  
Clarias Gariepinus ◽  
Freshwater Fishes ◽  
Dermestes Maculatus ◽  
Tropical Freshwater

scholarly journals Insectes ravageurs des poissons fumés au cours du stockage et dégâts occasionnés dans la boucle Nord de la Réserve de Biosphère du Dja (Est-Cameroun)

2020 ◽  
Vol 14 (2) ◽  
pp. 528-538
Author(s):  
Béranger Raoul Tamgno ◽  
Hervé Tekou Ngunte ◽  
Nectaire Lié Nyamsi Tchatcho ◽  
Mama Mouamfon ◽  
Léonard Simon Ngamo Tinkeu
Keyword(s):  
Fish Species ◽  
Oreochromis Niloticus ◽  
Insect Pests ◽  
Clarias Gariepinus ◽  
Biosphere Reserve ◽  
Economic Losses ◽  
Smoked Fish ◽  
Dermestes Maculatus ◽  
The North ◽  
Insectes Ravageurs

Dans de nombreux pays en voie de développement, 80% des captures de poissons sont fumés ou séchés afin de limiter les dégâts. Les insectes constituent un problème récurrent du poisson fumé stocké causant des grandes pertes économiques. Le but de l’étude réalisée dans quatre campements (Djeela, Nemeyong I, Malene I, Ndengué) de la boucle nord de la Réserve de Biosphère du Dja (RBD), était de déterminer la diversité des insectes ravageurs des poissons fumés stockés et leurs dégâts. Dans chaque campement, 25 outils de stockage des poissons fumés ont été inspectés, puis caractérisés et les espèces de poissons fumés identifiées. Lors de cette prospection, des collections de 8 espèces de poissons fumés ont été ramenées et mises en observation au laboratoire. Les insectes émergés des collections ont été dénombrés et identifiés et les dégâts évalués. Il ressort de cette étude que 31 espèces ichtyologiques appartenant à 12 familles sont fumées. Les Cichlidae (35,4%), les Clariidae (20,1%) et les Cyprinidae (10,3%) sont les familles les plus représentées. Oreochromis niloticus, Clarias gariepinus, Clariallabes manyangae sont les espèces les plus fumées. Les claies sont les outils de stockage les plus utilisés (46,66%). Excepté C. gariepinus infesté à 80%, les autres collections sont toutes infestées. Dermestes maculatus, Necrobia rufipes (Coléoptères) et Calliphora sp (Diptères) sont les insectes ravageurs des poissons fumés stockés. D. maculatus est le Coléoptère le plus préjudiciable aux stocks de poissons fumés avec 786 individus (99,49%) et 173,8 g de farine de forage. Les Insectes sont les principaux ravageurs des poissons fumés dans la RBD. C. gariepinus, C. manyangae et M. moorii sont les poissons fumés les plus attaquées. Les claies sont les outils de stockage les plus répandues.Mots clés : poissons fumés, structure de stockage, insectes ravageurs, dégâts, Réserve de Biosphère du Dja. English Title: Insect pests of smoked fishes during storage and damages done in the north loop of the Dja Biosphere Reserve (East-Cameroon) In many developing countries, 80% of fish catches are smoked or dried to limit losses. Insects are a recurring problem of stored smoked fishes causing great economic losses. The purpose of the study carried out in four camps (Djeela, Nemeyong I, Malene I, Ndengué) of the north loop of the Dja Biosphere Reserve (DBR), was to determine the diversity of insect pests of stored smoked fishes and their damages. In each camp, 25 smoked fish storage tools were inspected, then characterized, and the smoked fish species identified. During this survey, collections of 8 species of smoked fishes were brought back and put under observation in the laboratory. The insects emerged from the collections were enumerated and identified and the damage assessed. This study shows that 31 fish species belonging to 12 families are smoked. Cichlids (35.4%), Clariidae (20.1%) and Cyprinidae (10.3%) are the most common families. Oreochromis niloticus, Clarias gariepinus, Clariallabes manyangae are the most smoked species. Racks are the most used storage tools (46.66%). With the exception of C. gariepinus infested at 80%, the other collections are all infested. Dermestes maculatus, Necrobia rufipes (Coleopterans) andCalliphora sp (Dipterans) are the insect pests of the stored smocked fishes. D. maculatus is the more prejudicial Coleopteran to the storage of smoked fishes with 786 individuals (99.49%) and 173.8 g of drilling flour. Insects are the main pests of smocked fishes in the DBR. C. gariepinus, C. manyangae and M. moorii are the most attacked species. Racks are the most common storage tools.Keywords: Smoked fish, storage structure, insect pests, damages, Dja Biosphere Reserve.

PHYTOCHEMICAL SCREENING AND LARVICIDAL EFFECT EVALUATION OF AZADIRACHTA INDICA (L) LEAF EXTRACT ON DERMESTES MACULATUS (DE GEER, 1774) INFESTATION OF SMOKED CLARIAS GARIEPINUS (BURCHELL, 1822)

2020 ◽  
Vol 4 (2) ◽  
pp. 41-45
Author(s):  
Sadam Sulaiman Indabo ◽  
Rufai Zakari
Keyword(s):  
Azadirachta Indica ◽  
Leaf Extract ◽  
Standard Procedure ◽  
Clarias Gariepinus ◽  
Phytochemical Screening ◽  
Range Finding ◽  
Dermestes Maculatus ◽  
Randomized Design ◽  
Fish Samples ◽  
Initial Source

Dermestes maculatus is a major pest of stored fish in Nigeria, fish is preserved with highly persistent synthetic chemicals. There have been an increasing effort at developing plant-based toxicants that are environmentally friendly. Therefore, this study was conducted to screen the leaf extract of Azadirachta indica for phytochemical constituents. The efficacy of the methanolic leaf extract of the plant against D. maculatus was also evaluated. The leaves of A. indica were obtained, processed and taken to laboratory for methanolic extraction. Phytochemical screening was carried out to identify saponins, flavonoids, alkaloids, tannins, steroids, cardiac glycosides, glycosides, triterpenes and carbohydrates using standard procedure.  Both clean and infested samples of smoke-dried Clarias gariepinus were purchased from Sabon Gari Market, Zaria. The infested samples were used as initial source of D. maculatus larvae. Range finding test was carried out prior to the bioassay. During the bioassay, clean un-infested fish samples were weighed and introduced into kilner jars and respective dosages of 0.2g, 0.4g, 0.6g and 0.8g of extract were added. Another set of fish samples without the extract were maintained as control. The experiment was arranged in Completely Randomized Design with three replicates. Fifteen larvae of D. maculatus were introduced into both treated and control containers and covered. Mortality was recorded after 24, 48, 72 and 96 hours. Data obtained revealed an increase in mortality with increasing dose and time. Mortality ranged from 1.67 to 11.00. Therefore, leaf extract of A. indica should be incorporated in the development of larvicide against D. maculatus.   

Incidence and molecular characterization of fungi and yeast isolated from cultured catfish and Nile tilapia

2020 ◽  
Vol 21 (3) ◽  
pp. 61-66
Author(s):  
Ola Hashem ◽  
Viola Zaki ◽  
Rawia Adawy
Keyword(s):  
Molecular Characterization ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Clarias Gariepinus ◽  
Fungal Species ◽  
High Rate ◽  
Fish Farms ◽  
Isolation And Identification ◽  
Penicillium Spp

Objective: To study the incidence and seasonal dynamics of different fungi affected freshwater fishes in Lake Manzala with molecular identification of the isolated fungi. Animals: 300 Nile tilapia (Oreochromis niloticus) and 300 catfish (Clarias gariepinus). Design: Descriptive study. Procedures: Random samples of Oreochromis niloticus (O. niloticus) and Clarias gariepinus (C. gariepinus) were collected from Manzala fish farms. Clinical and postmortem examination of fish was applied. Isolation and identification of different fungi were performed by conventional methods. Furthermore, the molecular characterization of isolated fungi was carried out. Results: C. gariepinus had a higher rate of infection with different fungal species than O. niloticus. Aspergillus spp. (Aspergillus niger and Aspergillus flavus) were the most fungal isolated from the examined fishes, followed by Penicillium spp. and Candida albicans. Aspergillus spp were detected in all seasons with a higher rate in summer and spring. A. flavus, A. niger, Penicillium spp. and C.albicans isolates were amplified from both C. gariepinus and O. niloticus at the specified molecular weight using PCR. Conclusion and clinical relevance: Fungal infection affected the fish showing different external and internal lesions, all species of Aspergillus were found in all seasons with a high rate in, hot seasons, summer and spring. The Prevalence of Penicillium and C. albicans were also reported. All fungal isolates were identified on the phenotypic and molecular bases.

Description of Freshwater Fish Traditional Smoking in the Western Region, Cameroon

2021 ◽  
Vol 14 (1) ◽  
pp. 61-64
Author(s):  
Felix Meutchieye ◽  
Henri Grisseur Djoukeng ◽  
Youssouf Jamilou Ngouyamsa ◽  
Yacouba Manjeli
Keyword(s):  
Ethnic Group ◽  
Freshwater Fish ◽  
Oreochromis Niloticus ◽  
Clarias Gariepinus ◽  
Small Scale ◽  
African Catfish ◽  
Economic Activities ◽  
Fresh Fish ◽  
Hygiene Measures ◽  
Average Quantity

Western Cameroon is one of the regions most in needs of innovative and healthy solutions for freshwater fish conservation. This study aimed at evaluating the socio-economical characteristics of fish smokers and technical factors on the species smoked in the Noun Division. A total of 91 fish smokers were chosen. The socio-economic data were on age, gender, religion, number of dependents, marital status, ethnic group, education level, economic activities, smoking goals and workforce. The results of this study showed that fish smoking is practiced mainly by women (70%) which is common in Sub Sahara Africa small scale fish sector. The smokers are aged from 20 to 50 years (80%), married (92.2%) and taking care of a family of 1 to 10 persons (80%). These smokers are Muslim (74%), belonging to the Bamoun ethnic group (81%). They were also involved in other activities: agriculture (29%) and trade (1%). About 67% of the sampled smokers’ population had an experience of more than 10 years in the domain. The Purpose of smoking was largely sales (97%) and subsistence (3%). Nile tilapia (Oreochromis niloticus) was the most smoked species (36%), followed by African catfish (Clarias gariepinus) with a proportion of 32%. The average quantity of fresh fish smoked was 110 kg/day/smoker, with Oreochromis niloticus being more produced (60±4.74 kg/day/smoker). With regard to the smoking techniques used, hygiene measures were poorly respected. The major constraints revealed by the survey were that freshwater’s traditional fish smoking activities in Noun Division are influenced by gender, economic and cultural background. There is a lack of technical support material and financial means. Any implications for future investigations on health and food safety will be suitable for fresh fish smokers and the entire consumers.

Risk Assessment of Some Heavy Metals in Two Fish Species Oreochromis Niloticus and Clarias Gariepinus from Sharqia Province, Egypt

2021 ◽  
Vol 8 (1) ◽  
pp. 1-5
Author(s):  
Nahla S El-Shenawy ◽  
Heba N Gad EL-Hak ◽  
Mahi A Ghobashy ◽  
Maha FM Soliman ◽  
Farida A Mansour ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Human Health ◽  
Health Risks ◽  
Oreochromis Niloticus ◽  
Clarias Gariepinus ◽  
Human Health Risk ◽  
Dry Weight ◽  
Critical Problem ◽  
Potential Health

Accumulation of heavy metals in fish is considered a critical problem for human health. Therefore, the study aimed to quantify the concentrations of iron (Fe), zinc (Zn), manganese (Mn), and lead (Pb) in Oreochromis niloticus and Clarias gariepinus from two areas in Al Sharqia governorate, Egypt, from September 2017 to August 2018. A human health risk assessment was conducted to evaluate the potential hazards associated with fish consumption. Metals concentrations (mg/kg dry weight) in muscles of catfish ranged 1.88-221.26 for Fe; 1.78-19.77 for Zn; BDL-238.51 for Mn; BDL-22.75 for Pb. In muscles of tilapia fish metals concentrations ranged 7.96-149.10 for Fe; 1.20-19.77 for Zn; BDL-230.82 for Mn; BDL-25.93 for Pb. Pb had Hazard quotients (HQs) which indicated potential health risks to tilapia consumers at both study areas and catfish consumers at the Faqous area. Fishermen were at higher risk compared to the other consumers.

scholarly journals Heavy Metal Pollution in the Receiving Environment of the University of Dar Es Salaam Waste Stabilization Ponds

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Adrehem J. Nziku ◽  
Lucy Namkinga
Keyword(s):  
Heavy Metal ◽  
Fish Species ◽  
Oreochromis Niloticus ◽  
Clarias Gariepinus ◽  
Dar Es Salaam ◽  
Waste Stabilization Ponds ◽  
Waste Stabilization ◽  
Safe Limits ◽  
The University ◽  
Concentration Levels

The aim of this study was to examine the availability, concentration levels and bioaccumulation of heavy metals namely; Mercury (Hg), Cadmium (Cd), Lead (Pb), Zinc (Zn) and Molybdenum (Mo) in the waste Stabilization Ponds of the University of Dar es Salaam. A total of 135 samples were analyzed, out of which 27 were samples of water, 27 of sediments and 81 samples of fish tissues. Two types of fishes were used namely; Oreochromis niloticus and Clarias gariepinus. Heavy metal concentration varied significantly between water, sediment, fish species and tissues. Hg, Cd, Zn and Mo concentrations in water and sediment were within WHO safe limits. However, Pb in water and Cd, Pb and Zn concentrations in sediments were found to be above WHO standards (p<0.05). Concentration levels for Cd, Pb and Zn were above acceptable levels in Oreochromis niloticus while Hg was found to be within safe limits in both fish species (p<0.05). Molybdenum was found to be below the detection limits in Oreochromis niloticus. While Cd was not detected, Pb, Zn and Mo were found highly accumulated in Clarias gariepinus (p<0.05). Oreochromis niloticus accumulated metals in the increasing order from dorsal muscles < gills < liver while Clarias gariepinus accumulated metals in the decreasing order from dorsal muscle < gills < liver.Public awareness on the dangers to which fish consumers from the site are exposed is highly suggested and purposeful mitigation measures of stopping all fishing activities in these sites is needed, also animal feeding around the ponds should be forbidden.

scholarly journals Pola dan Parameter Pertumbuhan Ikan Tangkapan Dominan (Oreochromis niloticus, Osteochilus sp. dan Xiphophorus helleri) di Danau Buyan Bali

2017 ◽  
Vol 4 (2) ◽  
pp. 204 ◽  
Author(s):  
I Made Suma Krisna Sravishta ◽  
I Wayan Arthana ◽  
Made Ayu Pratiwi
Keyword(s):  
Growth Pattern ◽  
Oreochromis Niloticus ◽  
Growth Parameters ◽  
Clarias Gariepinus ◽  
Macrobrachium Rosenbergii ◽  
Growth Parameter ◽  
Growth Patterns ◽  
K Value ◽  
Xiphophorus Helleri ◽  
L Value

Bali Province has four lakes one of them is Buyan Lake. The benefits of Buyan Lake are as a reserve of water used to flow agriculture, settlements and for tourism attraction. In addition there is also the potential of Buyan Lake natural resources of fish is quite abundant. But there are threats arising from the utilization in Buyan Lake so it is feared to disrupt the growth of fish. Therefore it is necessary to do research concern with growth pattern and parameter of dominant catch fish in Buyan Lake. The aimed of this research was to determined the composition of fish catches, estimate the frequency distribution of fish catches and estimate growth patterns and growth parameters of dominant catch fish in Buyan Lake. This research was conducted from February to March 2017. There were nine species captured during observation such as Oreochromis niloticus, Osteochilus sp., Xiphophorus helleri, Rasbora lateristriata, Cyprinus carpio L, Amatitlania nigrofasciata, Puntius sp., Clarias gariepinus and Macrobrachium rosenbergii. The growth pattern of Oreochromis niloticus, Osteochilus sp. and Xiphophorus helleri in Lake Buyan have the same growth pattern that were allometric negative (b <3).  Oreochromis niloticus growth parameter obtained L? of 255.1926 mm, K value of 0.2833, t0 value of -0.3260, Osteochilus sp. growth parameter obtained L? value of 251.3837 mm, K value of 0.5261 t0 value of -0.1697, Xiphophorus helleri growth parameter obtained L? value of 82.5826 mm, K value of 0.2379, t0 value of -0.5338. Osteochilus sp. had the highest growth coefficient of 0.5261.

Sign in / Sign up

Export Citation Format

Share Document