Articles de revues : « Zillis »

1

Bohm, Christine Blauer, Konrad Zehnder, Heinz Domeisen et Andreas Arnold. « Climate Control for the Passive Conservation of the Romanesque Painted Wooden Ceiling in the Church of Zillis (Switzerland) ». Studies in Conservation 46, n^o 4 (2001) : 251. http://dx.doi.org/10.2307/1506775.

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Bläuer Böhm, Christine, Konrad Zehnder, Heinz Domeisen et Andreas Arnold. « Climate control for the passive conservation of the romanesque painted wooden ceiling in the church of Zillis (Switzerland) ». Studies in Conservation 46, n^o 4 (décembre 2001) : 251–68. http://dx.doi.org/10.1179/sic.2001.46.4.251.

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Effiong, M. U., et N. E. Obot. « Helminth parasites of cultured Clarias gariepinus and Tilapia zillii in Uyo, Akwa Ibom State, Nigeria ». Tropical Freshwater Biology 29, n^o 2 (29 avril 2021) : 87–94. http://dx.doi.org/10.4314/tfb.v29i2.7.

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The study examined helminth parasites of cultured Clarias gariepinus and Tilapia zillii in Uyo, Akwa Ibom State. A total of 60 fish samples (30 each of C.gariepinus and T. zillii) were subjected to parasitological examinations. Results revealed a total of 47(78.33%) fishes infected with various species of parasites: Nematodes (Camallanus polypteri, Paracamallanus cyathopharynx, and Procamallanus laevionchus), Cestodes (Polyonchobothrium torulosus and P. clariae) and Trematodes (Dactylogyrus extensus and Glossiduim pedatum) in decreasing order of abundance. Out of the 60 fish samples examined, 47 were infected with 219 parasites: 142(64.84%) nematodes, 40(18.26%) cestodes and 37(16.89%) trematodes. A total of 159(72.60%) parasites were recovered from C. gariepinus out of which 103(64.78%) were nematodes, 19(18.45%) were cestodes and 37(35.92%) were trematodes. While 60(27.40%) parasites were recovered from T. zilli, of which 39(65.00%) were nematodes and 21(35.00%) cestodes. No trematode was observed in the tilapia. The overall prevalence of parasitic infection was 78.33%. The results of chi square analysis showed that females of both species had significantly higher (P<0.05) prevalence of infection 27(84.4%) than males 20(71.4%). Also, C. gariepinus had higher infection rate of 25(83.33%) when compared to 22(73.33%) recorded in T. zillii. Key words: fish parasites, aquaculture, prevalence, C. gariepinus, T. zillii

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Garcia, Hugues. « « Les diverses dimensions d'apocryphité . Le cas du cycle de la nativité de Jésus dans le plafond peint de l'église SaintMartin de Zillis » ». Apocrypha 15 (janvier 2004) : 201–34. http://dx.doi.org/10.1484/j.apocra.2.300053.

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Ajagbe, S. O., D. O. Odulate, A. A. Idowu, R. O. Ajagbe, O. S. Ariwoola, F. I. Abdulazeez, M. T. Ojubolamo, A. O. Olomola, O. O. Oyekan et O. A. Ganiyu. « Estimation of gillnet selectivity of Coptodon zillii in Asejire Lake, Oyo State, Nigeria ». Tropical Freshwater Biology 29, n^o 1 (21 août 2020) : 71–84. http://dx.doi.org/10.4314/tfb.v29i1.5.

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Gillnet selectivity of Coptodon zillii was estimated in this study to determine the appropriate mesh size for the exploitation of the fish in Asejire dam. Holt’s indirect method of estimation was used to estimate gillnet selectivity of C. zillii in Asejire dam. Three mesh sizes 50.8mm, 63.5mm and 76.2mm were used for the estimation. The result shows that these mesh sizes caught C. zillii that were significantly different in sizes and abundant (P < 0.05). The 63.5 mm mesh size of gillnet was the most efficient; it caught 150 C. zillii with length range of 13 – 22 cm. Also, 50.8 mm mesh size caught137 C. zillii with length range of 11 – 18 cm. Likewise, 76.2 mm mesh size caught 57 C. zillii with length range 16 – 24 cm. The optimum length of 50.8 mm mesh size was 14.78 cm, 63.5 mm was 18.48 cm and 76.2 mm was 22.17 cm. Mesh size of 63.5mm is recommended as the appropriate mesh size for the exploitation of C. zillii in Asejire dam for the sustainability of the fish. This is done to prevent both recruitment and growth overfishing of C. zillii in Asejire dam. Key words: optimum length; exploitation; selection; sexual maturity; recruitment overfishing, growth overfishing

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Mohamed, Abdul-Razak M., et Abdullah N. Abood. « Population dynamics and management of two cichlid species in the Shatt Al-Arab River, Iraq ». Journal of Applied and Natural Science 12, n^o 2 (9 juin 2020) : 261–69. http://dx.doi.org/10.31018/jans.vi.2293.

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Cichlids are invasive fish to Iraqi waters and became well established and prevailing in different waters. Despite that, there is no stock assessment study conducted for these fish. So, growth, mortality, recruitment and yield-per-recruit of two cichlid’s species; Coptodon zillii and Oreochromis aureus from the Shatt Al-Arab River, Iraq were evaluated from November 2015 to October 2016 using the FiSAT software. A total of 1285 C. zillii (2.9-24.0 cm TL) and 1353 O. aureus (4.5-25.0 cm TL) were examined. Length-weight relationships were derived, indicating allometric growth for both species. The growth parameters (L?, K, Rn, to and ?) obtained for C. zillii were 25.5 cm, 0.320, 0.212, -0.793 and 2.318, respectively, while for O. aureus were 27.8, 0.490, 0.214, -0.271 and 2.578, respectively. The annual rate of total mortality (Z), fishing (F) and natural (M) for C. zillii was found to be 1.51, 0.84 and 0.68 respectively, and for O. aureus 2.49, 1.08 and 1.41, respectively. The present exploitation rates (Epresent) for C. zillii and O. aureus were computed to be 0.454 and 0.57, respectively. Lengths at first capture (LC) were 12.97 cm for C. zillii and 13.25 cm for O. aureus. The peaks of recruitment of C. zillii and O. aureus were from February to May and May to July, respectively. The Epresent for C. zillii and O. aureus were below the biological target reference points (F0.1 and Fmax), indicating that these species were not overexploited. For management purposes, more yields could be obtained by an increase in the fishing activities on cichlids.

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Mehanna, S. F. « Population Dynamics of Two Cichlids, Oreochromis aureus and Tilapia zilIi, from Wadi EI-Raiyan Lakes, Egypt ». Journal of Agricultural and Marine Sciences [JAMS] 9, n^o 1 (1 janvier 2004) : 9. http://dx.doi.org/10.24200/jams.vol9iss1pp9-16.

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Age, growth, mortality, relative yield-per-recruit and relative biomass-per-recruit of Oreochromis aureus and Tilapia zilli collected from Wadi EI-Raiyan lakes during the period from August 2000 until July 2001 have been estimated. Age was determined from scale readings and the results showed that the maximum life spans of O. aureus and T. zilli were three and four years, respectively. The von Bertalanffy growth equations were L1= 27.15 (l-e'0.56(t+0.32) for 0. aureus and L1= 33.5 (l-e -0.49(t+0.15) for T. zilli. The instantaneous annual rates of total, natural and fishing mortality were calculated as 1.69, 0.25 and 1.44, respectively for 0. aureus and 1.1, 0.2 and 0.9, respectively for T. zilli. Exploitation rate was estimated as 0.85 and 0.82 for 0. aureus and T. zilli, respectively. Relative yield-per- recruit and relative biomass-per-recruit analysis indicated that the stocks of O. aureus and T. zilli were overexploited and that the current exploitation rate should be reduced by about 53% for 0. aureus and 55% for T. zilli to ensure that at least 50% of the individuals could be maintained for spawning and recruitment.

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Mohamed, Abdul-Razak. « Trophic Interactions between Two Cichlid Species in Shatt Al-Arab River, Iraq ». Biological and Applied Environmental Research 5, n^o 1 (15 janvier 2021) : 74–85. http://dx.doi.org/10.51304/baer.2021.5.1.74.

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The diet composition and trophic relationships of the blue tilapia, Oreochromis aureus and redbelly tilapia, Coptodon zillii were investigated in the Shatt Al-Arab river from November 2015 to October 2016. Fishes were collected by gill nets, cast net and electro-fishing. The index of relative importance (IRI%) of food items was determined by combining the frequency of occurrence and points methods. There were monthly variations in feeding activity and intensity of both species, which decreased in the colder months. Both species were classified as herbivores. The main food items of O. aureus were macrophytes (44.3%), algae (31.4%), diatoms (9.3%), aquatic insects (6.6%) and detritus (6.3%). The diet of C. zillii is composed mainly of macrophytes (60.8%), algae (23.0%), detritus (8.6%) and diatoms (6.4). The trophic niche breadth values varied between 0.217 for C. zillii and 0.360 for O. aureus. The results demonstrated a high degree of dietary overlap between O. aureus and C. zillii, as both species fed on the same food sources

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AGBEBI, O. T., et J. ECHEFU. « PHYLOGENETIC ANALYSIS ON FOUR SPECIES OF TILAPIA (Oreochromis niloticus, Tilapia zilli, Sarotherodon galilaeus, Sarotherodon melanotheron) IN NIGERIA ». Journal of Agricultural Science and Environment 16, n^o 2 (22 novembre 2017) : 61–68. http://dx.doi.org/10.51406/jagse.v16i2.1707.

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An investigation into evolutionary history of four species of Tilapia species was carried out as a taxonomy tool to relate most tilapia species found within the Nigerian waters. These species are (Oreochromis niloticus, Tilapia zilli, Sarotherodon galilaeus, Sarotherodon melanotheron). Blood samples from the four species of tilapia were collected and preserved on Fast Technology for Analysis (FTA) cards for DNA extraction and PCR amplification. The various nucleotide sequences of the four Tilapia species found in the Mitochondria D-loop region were copied and aligned with the use of BioEdit and Mega 6.0 softwares. Three phylogenetic trees were drawn to show the evolutionary relationship amongst the four species of tilapia. The results indicated that Sarotherodon galilaeus and Sarotherodon melanotheron are sister texa and share a common ancestor with Oreochromis niloticus. Tilapia zilli is an out group which is the most distantly related to the three species (Oreochromis niloticus, Sarotherodon galilaeus Sarotherodon melanotheron). Tilapia zilli (Israel) and Tilapia zilli are sister texa and share a common ancestor in Tilapia sparmanii. The study also revealed ancestry relationship among other species of fish Cyprinus caprio and Clarias gariepinus formed a clade with the three tilapia species (Tilapia zilli, Tilapia zilli (Israel) and Tilapia sparmanii), which share an unknown but common ancestor.

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KOMOLAFE, Olusola Olaniyi, Timothy Olalekan AMOO et Michael Olufemi AWODIRAN. « Food Habits and Diet Relationship in the Redbelly Tilapia (Tilapia zillii) and Guenther’s Mouthbrooder (Chromidotilapia guntheri) from an Abandoned Gold Mine Reservoir, Southwestern Nigeria ». Notulae Scientia Biologicae 10, n^o 2 (29 juin 2018) : 148–55. http://dx.doi.org/10.15835/nsb10210254.

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The food and feeding habits of the redbelly Tilapia (Tilapia zillii) and Guenther’s mouthbrooder (Chromidotilapia guntheri) were investigated in an abandoned gold mine reservoir at Igun from June 2013 to May 2014. Using a cast net and gill-net fishing gears, 370 fish individuals were caught and their stomach contents were analysed by using the frequency of occurrence and numerical methods. Tilapia zillii comprised 53.78% (199 individuals), while Chromidotilapia guntheri covered up the remaining percentage (46.22%) which is made up of 171 individuals. Food items in the stomachs of T. zillii individuals predominantly consisted of detritus, mud and algae (77.97%), while those in C. guntheri individuals mostly consisted fish remains, detritus and algae (81.67%). T. zillii exploited more food items (23 of 27) as compared to C. guntheri (17 of 27). The Schoener’s index value for the species was 0.65. The study showed that T. zillii and C. guntheri exhibited benthopelagic exploitation and are mainly herbivorous and omnivorous respectively based on the food items observed in the stomach contents of these species. The fish species fed on related food items as confirmed by Schoener’s overlap index (0.65), suggesting that there was overlap in the dietary requirements of the two species. This index value, however, was probably not an indication of competition for food between these two species because they exploited abundant food sources.

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Saliņa, Jautrīte, et Dagnija Zigmonte. « Zilais putns Idalgo ». World Literature Today 65, n^o 1 (1991) : 159. http://dx.doi.org/10.2307/40146309.

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OBAYEMI, Oluwadamilare E., Olusola O. KOMOLAFE, Oluwakemi V. OKUNOLA, Sakirat T. ASAFA et Mary A. AYOADE. « Length-Weight Relationships and Condition Factors of Three Tilapine Species in an Abandoned Gold Mine Reservoir, Igun, Southwestern Nigeria ». Notulae Scientia Biologicae 11, n^o 2 (28 juin 2019) : 205–9. http://dx.doi.org/10.15835/nsb11210433.

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This study investigated the length-weight relationships and condition factors of three fish species in an abandoned gold mine reservoir. The fishes were caught on monthly basis between August 2015 and July 2016 using gill nets and traps. The results showed that Coptodon zillii, Oreochromis niloticus and Sarotherodon galilaeus had a mean total length and mean weight of 15.52±4.64 cm and 95.80±66.27 g; 15.27±4.18 cm and 89.54±63.20 g; 15.57±4.80 cm and 102.0±85.81 g respectively. Also, the mean condition factor obtained for the fish species are 2.24±0.52 in C. zillii; 2.26±0.62 in O. niloticus and 2.27±0.46 in S. galilaeus. Similarly, the slope (b) values and correlation coefficient for the three fish species are 2.018 and 0.969 for C. zillii; 1.977 and 0.926 for O. niloticus and 2.436 and 0.965 for S. galilaeus. Furthermore, the total length, weight and condition factor between C. zillii, O. niloticus and S. galilaeus differ significantly (p>0.05). The study concluded that despite being an abandoned gold mine reservoir, the environment is well suitable for the fishes.

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Al-Okailee, Muna T. K., Falah M. Mutlak et Laith F. Lazem. « Distribution of red belly tilapia Coptodon zillii (Gervais, 1848) larvae in Shatt Al-Arab River and East Hammar marsh, Iraq ». Basrah Journal of Agricultural Sciences 30, n^o 1 (30 juin 2017) : 26–31. http://dx.doi.org/10.37077/25200860.2017.13.

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The larvae of Coptodon zillii were surveyed in Shatt Al-Arab River and East Hammar marsh from January 2015 to December 2015. A total of 127 C. zillii larvae were collected from three stations. The highest number of C. zillii larvae was 78 recorded at station 1 in East Hammar marsh (Mansoury), comprised 61.41% of the total fish larvae collected, and the lowest number (23) was from station 3 in Shatt Al-Arab River near Abu Al-Khaseeb, comprised 18.11% of the total fish larvae collected. C. zillii larvae were found in the study regions from April to October. The peak of abundance was 22.8 larvae/10m² during July at station 1. The lower abundance of larvae was 0.7 larvae/10m² in June at station 2 at the confluence of the Garmat Ali River with Shatt Al-Arab River. Water temperatures in the three sampling stations were similar and ranged from 12°C in December to 32 °C in July. Salinity in station 1 ranged from 1.2‰ in August to 2‰ in June while in station 2 it ranged from 1.03‰ in October to 2.8‰ in July and in the station 3 ranged from 2.7‰ in April to 6.1‰ in December during the study period. Positive correlation was shown between water temperature and salinity in all stations with the number and abundance of C. zillii larvae. The results indicated that the Shatt Al-Arab River and East Hammar marsh are spawning grounds for this species.

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Abumandour, Mohamed M. A. « Ultrastructure features of the surface of the gills and the lower pharyngeal jaw of the Tilapia Zilli,redbelly tilapia(Coptodon Zillii,Gervais,1848) ». Anatomia, Histologia, Embryologia 48, n^o 1 (25 novembre 2018) : 12–21. http://dx.doi.org/10.1111/ahe.12406.

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IDOWU, A. A., W. O. ABDUL, W. O. ABDUL, A. A. ALIMI et M. O. TIJANI. « PRELIMINARY STUDIES ON RED BELLY TILAPIA COPTODON ZILLII CAUGHT FROM OYAN DAM, OGUN STATE, NIGERIA ». Journal of Agricultural Science and Environment 18, n^o 1 (6 novembre 2019) : 1–15. http://dx.doi.org/10.51406/jagse.v18i1.1909.

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The study was carried out on the biological aspect of Redbelly Tilapia, Coptodon zillii collected from Oyan Lake, Abeokuta North Local Government Area, Ogun State, Nigeria, with the aim of contributing to the baseline data for carrying out further studies on its ecology, conservation and development. A total of two hundred and fifty four fish (254) specimens were caught from the Ibaro landing site of the Lake between March and July, 2015. The total length (cm), standard length (cm), head length (cm), body width (cm), body depth (cm), snout length (cm), eye diameter (cm) and body weight (g) were measured. The stomach content was also assessed in order to determine its food and feeding habit. The mean total-length, standard-length, head-length, eye-diameter, snout-length, body-depth, body-width and body-weight during the study were 10.98±0.61cm, 8.56±0.14cm, 2.5±0.08cm, 3.67±0.15cm, 1.52±0.11cm,1.37±0.17cm, 4.05±0.07cm, 34.25±3.02g respectively and their ranges were (4.5-18.7cm), (3.2-15.2cm), (1.1-5.8cm), (2.0-6.8cm), (0.8-3.0cm), (1.1-4.8cm), (1.4-7.3cm) and (6.0-132.0g). A negative allometric (b<3) growth pattern was observed for the stock. The meristic characteristics of C. zillii were (DFR) XIV 10 – XVI 14; PVR, AFR III 8 –III 9; PFR 10 – 13 respectively. Stomach analysis showed that diatoms were the most abundant food items in the diet of C. zillii numerically, 29.98%, while desmids were the most abundant food items in terms of frequency occurrence, 27.82%. This study concluded that C. zillii is not morphometrically and meristically different from the already classified from previous studies. Also, C. zillii thrives well on available plants and detritus.

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ABDUL, W. O., I. T. OMONIYI, A. O. AGBON, F. I. ADEOSUN, O. S. OLOWE et E. O. ADEKOYA. « FOOD AND FEEDING HABITS OF SOME FISH SPECIES IN OGUN STATE COASTAL ESTUARY, OGUN STATE, NIGERIA ». Journal of Agricultural Science and Environment 16, n^o 1 (22 novembre 2017) : 61–74. http://dx.doi.org/10.51406/jagse.v16i1.1682.

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The food and feeding habits of eight (8) fish species Elops lacerta, Chrysichthys auratus, Schilbe mys-tus, Sardinella maderensis, Synodontis schall, Hepsetus odoe, Tilapia zillii and Mugil cephalus in Ogun estuary, Ogun State, Nigeria were studied and estimated for six months, between February and July, 2014. A total of 470 fishes were randomly collected from the commercial fishermen during the study. Results from the stomach contents analysed using frequency of occurrence and numerical methods showed that S. mystus, E. lacerta, S. maderensis, H. odoe, S. schall, T. zillii, M. cephalus and C. auratus were predators, piscivores, herbivores, piscivores, omnivores, herbivores, herbivores and omnivores respectively while H. odoe and S.mystus partly fed on E. lacerta and T. zillii respec-tively. The Diet Breadth (D) ranged from 0.76 to 0.88 and the percentage Gut Repletion Index (GRI), a reflection of frequency of feeding, ranged between 60-100%.

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Pfeifer, Felicitas. « Wolfram Zillig (1925–2005) ». Extremophiles 9, n^o 5 (23 septembre 2005) : 343–44. http://dx.doi.org/10.1007/s00792-005-0481-0.

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Keyombe, James Last, Kevin Obiero, Edna Waithaka, Nicholas Outa, Oscar Donde et Domitila Kyule. « Understanding selected growth aspects in Redbelly Tilapia, Coptodon zilli (Gervais) and Largemouth Bass, Micropterus salmoides (Lacepède) in Lake Naivasha, Kenya ; Fisheries Management Perspective ». Pan Africa Science Journal 01, n^o 01 (18 avril 2020) : 72. http://dx.doi.org/10.47787/pasj.2020.02.21.

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Coptodon zilli and Micropterus salmoides were introduced into Lake Naivasha in 1929 and 1959 respectively. The reasons for the introduction were to boost the fisheries and for recreational fishing respectively. However, the numbers of the two fish species in the lake have been declining over the years. It is therefore necessary to assess various aspects of their growth such as length-weight relationship, condition factor, sex ratio and length at first maturity to inform management and policy making for enhanced recovery and establishment of their populations. Length-weight relationship, condition factor, sex ratio and length at first maturity of the fish were studied from October 2016 to November 2018. A total of 303 fish samples; 193 C. zilli and 110 M. salmoides were studied. Results showed that C. zilli and M. salmoides had an allometry coefficient value of 2.9 and 3.1 and condition factor (K) value of 1.77 and 1.39 respectively. The sex ratios (male: female) of C. zilli and M. salmoides were 1.1:1 and 1.3: 1 respectively. The shortest total length for mature C. zilli and M. salmoides recorded were 12 cm and 26.5 cm while 21.8 cm and 51 cm were for the longest respectively. The fish growth pattern therefore failed to obey the cube law of b=3 thus exhibiting allometric growth. The two fish species were found to be in good condition with K factor above 1. It can therefore be concluded that the fish are generally in a good condition though the early maturity especially for C. zilli could be a sign of pressure either from environmental factors or human induced. Domination of the species by males, although a common feature in African lakes, is a case for concern since it presents uncertainty on the future of the fisheries. Restocking of Lake Naivasha with the two fish species should be considered and proper fishing practices enforced

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Robert, Agnes, Prosper Mfilinge, Samwel M. Limbu et Chacha J. Mwita. « Fatty Acid Composition and Levels of Selected Polyunsaturated Fatty Acids in Four Commercial Important Freshwater Fish Species from Lake Victoria, Tanzania ». Journal of Lipids 2014 (2014) : 1–7. http://dx.doi.org/10.1155/2014/712134.

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Fatty acids (FAs) particularlyω3 andω6 polyunsaturated fatty acids (PUFAs) play important role in human health. This study aimed to investigate the composition and levels of selectedω3 PUFAs in four commercial fish species, Nile perch (Lates niloticus), Nile tilapia (Oreochromis niloticus),Tilapia zillii, and dagaa (Rastrineobola argentea) from Mwanza Gulf in Lake Victoria. The results indicated that 36 types of FAs with different saturation levels were detected. These FAs were dominated by docosahexaenoic (DHA), eicosapentaenoic (EPA), docosapentaenoic (DPA), and eicosatetraenoic acids.O. niloticushad the highest composition of FAs (34) compared toL. niloticus(27),T. zillii(26), andR. argentea(21). The levels of EPA differed significantly among the four commercial fish species(F=6.19, P=0.001). The highest EPA levels were found inR. argenteafollowed byL. niloticusandO. niloticusand the lowest inT. zillii. The DPA levels showed no significant difference among the four fish species studied(F=0.652, P=0.583). The study concluded that all four commercial species collected from Mwanza Gulf are good for human health, butR. argenteais the best for consumption because it contains higher levels ofω3 FAs, mainly EPA.

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Carvalho, José Mauricio de. « A Dignidade Humana segundo Zilles ». Revista de Ciências Humanas 47, n^o 2 (4 octobre 2013) : 384. http://dx.doi.org/10.5007/2178-4582.2013v47n2p384.

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Yacoub, Amal M., Soaad A. Mahmoud et Amaal M. Abdel-Satar. « Accumulation of heavy metals in tilapia fish species and related histopathological changes in muscles, gills and liver of Oreochromis niloticus occurring in the area of Qahr El-Bahr, Lake Al-Manzalah, Egypt ». Oceanological and Hydrobiological Studies 50, n^o 1 (1 mars 2021) : 1–15. http://dx.doi.org/10.2478/oandhs-2021-0001.

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Abstract Accumulation of metals (Fe, Zn, Cu, Mn, Pb, Cd and Ni) in the muscles and gills of Oreochromis niloticus, Oreochromis aureus and Tilapia zillii was assessed based on seven locations in the Qahr El-Bahr area in Lake Al-Manzalah. The average accumulation of metals was in the following order: Tilapia zillii > Oreochromis aureus > Oreochromis niloticus. To determine the risk of fish consumption, the estimated daily intake, carcinogenic, non-carcinogenic and relative risk indices were calculated. The results indicate that the intake of individual metals through the consumption of fish is almost safe for human health, whereas the intake of combined metals poses a high potential health risk to consumers. Assessment of carcinogenic risk of Cd and Ni from the consumption of tilapia species indicates that consumers are at risk of cancer. The contribution of Pb and Cd to the overall relative risk index ranged from 34% to 41%. Of the three species studied, Oreochromis niloticus is relatively safe for consumption as it poses the least health hazard, while Tilapia zillii is more predisposed to accumulate metals in its tissues. Histopathological changes were observed in the muscles, gills and liver of Oreochromis niloticus as a result of heavy metal accumulation in these organs.

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GYULAI, PETER, et AIDAS SALDAITIS. « Leucapamea srnkai sp. n., a new Apameini species from China (Lepidoptera, Noctuidae) ». Zootaxa 4786, n^o 4 (4 juin 2020) : 597–600. http://dx.doi.org/10.11646/zootaxa.4786.4.12.

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The genus Leucapamea was erected by Sugi (1982). The most recent revision of the genus was provided by Zilli et al. (2009), and include descriptions of five new species. Leucapamea species are diagnosed by the whitish ground colour of forewings and the very long, sword-like superior saccular process. Leucapamea is distinguished from the related genus Lateroligia Zilli, Fibiger & Ronkay, 2005 by the triangular cucullus having only a slight ventral extremity and the presence of the strong cornutus in the vesica. Thirteen species of Leucapamea have been described (Zilli et al. 2009), four of which are endemic to Taiwan, two to Japan, and the other species distributed from the northern Pacific to Southern China and Vietnam. Following research in Sichuan during the last years, an additional species is described and diagnosed here.Abbreviations for personal and institutional collections used herein are as follows: AFM = Alessandro Floriani (Milan, Italy); ASV = Aidas Saldaitis (Vilnius, Lithuania); HNHM = Hungarian Natural History Museum (Budapest, Hungary); PGM = collection of Péter Gyulai (Miskolc, Hungary); GYP = genitalia slide of P. Gyulai; RL = genitalia slide of L. Ronkay.

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OLADIMEJI, Tofunmi E., Michael O. AWODIRAN et Olaniyi O. KOMOLAFE. « Genetic Differentiation Studies among Natural Populations of Tilapia zillii ». Notulae Scientia Biologicae 7, n^o 4 (13 décembre 2015) : 423–29. http://dx.doi.org/10.15835/nsb749649.

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The population structure of Tilapia zillii (Gervais 1848) from three reservoirs in Nigeria, Osun State (Opa, Osu and Igun) was determined by employing morphological and molecular (Random Amplified Polymorphic DNA) methods. For morphological studies, 25 morphometric measurements and six meristic counts were recorded on 40 individuals within each population. Principal Component Analysis (PCA) was performed on the morphometric and meristic data using the PAST software. For RAPD studies, genomic DNA was extracted from caudal fin tissue using CTAB method and five primers were used to initiate PCR amplifications. All the clusters produced by the Principal components analysis (PCA) of the morphometric and meristic parameters overlapped indicating a low level of genetic differentiation between the three populations of T. zillii studied. The UPGMA cluster diagram from RAPD analysis identified two major genotypic groups with inter and intra group relationships. All individuals in the first cluster were from the Osu reservoir, while individuals from Opa and Igun reservoirs constituted the second cluster. Nei’s unbiased measure of genetic distances was 0.8532, 0.7321 and 0.7111 for Osu, Igun and Opa populations respectively. This revealed that Opa and Igun populations were genetically closer, while Osu populations is distant from them. The results suggest that the RAPD technique could be used to differentiate populations of T. zillii. However, additional methods such as microsatellite and sequence analysis can be used to maximize the efficiency of genetic differentiation studies.

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Falade, Mofolusho O., Anthony J. Opene et Otarigho Benson. « DNA barcoding of Clarias gariepinus, Coptodon zillii and Sarotherodon melanotheron from Southwestern Nigeria ». F1000Research 5 (8 juin 2016) : 1268. http://dx.doi.org/10.12688/f1000research.7895.1.

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DNA barcoding has been adopted as a gold standard rapid, precise and unifying identification system for animal species and provides a database of genetic sequences that can be used as a tool for universal species identification. In this study, we employed mitochondrial genes 16S rRNA (16S) and cytochrome oxidase subunit I (COI) for the identification of some Nigerian freshwater catfish and Tilapia species. Approximately 655 bp were amplified from the 5′ region of the mitochondrial cytochrome C oxidase subunit I (COI) gene whereas 570 bp were amplified for the 16S rRNA gene. Nucleotide divergences among sequences were estimated based on Kimura 2-parameter distances and the genetic relationships were assessed by constructing phylogenetic trees using the neighbour-joining (NJ) and maximum likelihood (ML) methods. Analyses of consensus barcode sequences for each species, and alignment of individual sequences from within a given species revealed highly consistent barcodes (99% similarity on average), which could be compared with deposited sequences in public databases. The nucleotide distance between species belonging to different genera based on COI ranged from 0.17% between Sarotherodon melanotheron and Coptodon zillii to 0.49% between Clarias gariepinus and C. zillii, indicating that S. melanotheron and C. zillii are closely related. Based on the data obtained, the utility of COI gene was confirmed in accurate identification of three fish species from Southwest Nigeria.

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David Owolabi, Olufemi, et Olufunsho Awodele. « Heavy metal bio-accumulation in the kidneys of scaly and non-scaly fishes from Epe Lagoon, Nigeria ». UNED Research Journal 11, n^o 2 (17 juin 2019) : 201–11. http://dx.doi.org/10.22458/urj.v11i2.2307.

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Introduction: Heavy metal contamination of aquatic ecosystems has been a serious concern throughout the world for many decades, and has caused devastating effects on aquatic organisms. Objective: To evaluate the levels of Cu, Zn, Fe, Pb and Cd in the kidneys of scaly (T. zillii, M. rume and R. ocellatus) and non-scaly (C. gariepinus, Ch. nigrodigitatus and S. filamentosus) fishes in Epe lagoon, Nigeria to understanding the bioaccumulation potential of the kidney relative to other organs in fish that have previously been reported in literature. Methods: We studied concentrations of copper (Cu), iron (Fe), zinc (Zn), cadmium (Cd) and lead (Pb) in the kidneys of 141 scaly fishes (Mo. rume, R. occellatus, T. zillii) and 134 non-scaly fishes (C. gariepinus, S.filamentosus, Ch. nigrodigitatus) and water samples obtained from Epe Lagoon using Standard Atomic Absorption Spectrometry methods. Results: The kidneys of R. ocellatus had the highest levels of Fe (2,92±0,10) and Cd (0,18±0,03), while that of Ch. nigrodigitatus (2,78±0,02) and T. zillii (0,31±0,02) had the lowest concentration of Fe and Cd respectively. T. zillii and M. rume accumulated Cu and Zn in their kidneys respectively more than the others. There was no significant difference (p<0,05) in mean trace metal concentrations among the scaly and non-scaly fishes. The concentrations of metals in fish specimens were below the FEPA and WHO prescribed maximum allowable limits in food fish. Dissolved oxygen (9,0±0,02) and total alkalinity (24,0±0,01) were above FEPA values (dissolved oxygen: 3,0-5,0mg/L and total alkalinity: 3,05-5,3mg/L). The ranking of heavy metals distribution in the water body was Cu (4,70)>Fe (0,72)>Zn (0,13)>Pb (0,007)>Cd (0,006). Bioconcentration factor of Zn was generally high in all species. Conclusion: Close monitoring of these metals in the fishes and the lagoon is important to ensure the safety of fish consumers in the area.

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Echi, Paul Chinedu, et Victoria Chimuanya Ezeala. « The occurrence of heterophyid metacercariae in a stream linked aquatic reservoirs, Southeast Nigeria ». Brazilian Journal of Biological Sciences 3, n^o 5 (2016) : 105. http://dx.doi.org/10.21472/bjbs.030509.

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The study of teleost parasites in an ecologically altered ecosystem through dam construction that evidently facilitate parasitic infections and aggravate public health concerns is essential. The study of stream linked dam showed that Tilapia zillii (Gervais, 1848), Pelmatolapia mariae (Boulenger, 1899) and Clarias gariepinus (Burchell, 1822) form the major fish composition of these reservoirs. They serve important food resource globally especially places bereft of extensive aquaculture practices. Although, knowledge about the gill parasites of P. mariae is inexistent the examined individual P. mariae showed that it had 54% Heterophyes heterophyes infection, C. gariepinus had no parasitic infection whereas T. zillii had a relatively very low Batrachobdelloides spp (1.7%). Besides, the highest DO levels in the dam occasioned by high agitation and floatation the physical factors conditions - pH and DO (> 6 mg.L^-1) had suitable levels for biodiversity.

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Rocha, Raíssa Marcelli. « ZILLES, Urbano. O racional e o místico em Wittgenstein. 2ºed. Porto Alegre : EDIPUCRS, 1994, p.96. » Cadernos do PET Filosofia 7, n^o 14 (6 août 2017) : 104–6. http://dx.doi.org/10.26694/cadpetfil.v7i14.3097.

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A obra "O racional e o místico em Wittgenstein" é uma das obras do professor Urbano Zilles, da PUC-RS, que tem a finalidade de mostrar um panorama da filosofia de Ludwig Wittgenstein com leitura e análise de suas principais obras: Tractatus Lógicus-philosophicus e Investigações Filosóficas.

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Namaga, W. M., B. Yahaya et M. A. Salam. « Proximate composition of male and female African catfish (Clarias gariepinus) and tilapia (Tilapia zilli) in Jega river, Kebbi state, Nigeria ». Journal of Fisheries, Livestock and Veterinary Science 01, n^o 02 (2020) : 28–35. http://dx.doi.org/10.18801/jflvs.010220.04.

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Fish is highly nutritious, tasty, and easily digestible. It is much sought after by a broad cross-section of the world’s population, particularly in developing countries as it provides the cheapest protein source. Nigeria is blessed with numerous inland freshwater rivers and lakes scattered all over the country. This freshwater habitat consists of many species of fish that have successfully dominated all niches over time and have for many reasons remained unstudied. The situation concealed a lot of scientific information particularly on food security and safety to the inmates and the country at large. Jega River which transcended many States in the North-Western part of Nigeria to open into the river Niger is one of such rivers largely uncared for, study-wise. African catfish (Clarias gariepinus) and Tilapia (Tilapia zillii) have been wisely selected for the present proximate composition studies. The juveniles of these fishes were purchased from local fishermen in Mariner Waje landing site of the river which flows by Jega town, a local government area in Kebbi State, Nigeria. For the study, the methodology approved by the Association of Official Analytical Chemists (AOAC) was used to determine the proximate composition of the fishes. The highest percentage crude protein content of 49.18 ± 0.30% was observed in juvenile female C. gariepinus; while the lowest protein content of 39.22± 0.50% was observed in juvenile male T. zilli. The highest percentage lipid content of 11.75± 1.50% was observed in juvenile female tilapia; while the lowest percentage lipid content of 6.25± 0.29% was observed in male African catfish. The highest percentage fibre content of 4.00 ± 0.29% was observed in male and female C. gariepinus, while the lowest percentage fibre content of 0.75± 0.29% was observed in male tilapia. There were variations (p< 0.05) when the protein and lipid contents of both the species were compared with each other. There was also a significant difference (p< 0.05) when the carbohydrate contents were compared between the fish species, but there was no significant difference (p > 0.05) when the fibre content was compared within the species. The analyses showed that both the male and female fish species studied had high protein contents.

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D'Angelillo, Rolando M., Sara Ramella et Lucio Trodella. « In Reply to Zilli and Miralbell ». International Journal of Radiation Oncology*Biology*Physics 91, n^o 3 (mars 2015) : 682. http://dx.doi.org/10.1016/j.ijrobp.2014.10.056.

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Gao, Xian-shu, Xin Qi et Dian Wang. « In Reply to Zilli et al ». International Journal of Radiation Oncology*Biology*Physics 109, n^o 4 (mars 2021) : 1128. http://dx.doi.org/10.1016/j.ijrobp.2020.11.030.

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Zaborszky, Laszlo. « Karl Zilles (1944–2020) : a personal tribute ». Brain Structure and Function 225, n^o 4 (mai 2020) : 1185–87. http://dx.doi.org/10.1007/s00429-020-02088-5.

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GYULAI, PETER, AIDAS SALDAITIS et ALBERTO ZILLI. « Nomenclatural note on Alena Gyulai, Saldaitis & ; Zilli, 2019 nec Navás, 1916 ». Zootaxa 4604, n^o 1 (13 mai 2019) : 197. http://dx.doi.org/10.11646/zootaxa.4604.1.10.

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In the article by Gyulai et al. (2019) a primary homonymy was inadvertently established, that is amended herein as: Aliona nom. nov. pro Alena Gyulai, Saldaitis & Zilli, 2019 [Lepidoptera], preoccupied by Návas, 1916 [Raphidioptera].

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Amaechi, C. Ebube. « Prevalence, intensity and abundance of endoparasites in Oreochromis niloticus and Tilapia zilli (Pisces : Cichlidae) from Asa Dam, Ilorin, Nigeria ». UNED Research Journal 7, n^o 1 (5 juin 2015) : 67–70. http://dx.doi.org/10.22458/urj.v7i1.863.

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Disease is an important factor in fisheries, affecting both wild and cultured species. Using standard parasitological techniques we determined the prevalence, mean intensity and abundance of endoparasites from 250 specimens of two cichlids, Oreochromis niloticus and Tilapia zilli from Asa dam, Ilorin, North Central Nigeria between February and August, 2013. We found two digenetic trematode parasites:Euclinostomium heterostomum and Clinostomum tilapiae. The highest prevalence was recorded in O. niloticus (35,9%) infested by C.tilapiae, while the highest mean intensity was recorded in T. zilli. There was no relationship (p >0,05) between parasite burden and fish size(length and weight). Male fish were more heavily infected than females.The overall health status of both fish species remained unaffected. Thehigh rate of pollution noticed in the study area might be favoring parasite load. Therefore, pollution control and regular surveillance of the water body are advocated.

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Silva, Fábio De Barros. « A Pessoa Humana na Obra de Urbano Zilles ». Primeiros Escritos, n^o 2 (6 décembre 1999) : 137. http://dx.doi.org/10.11606/issn.2594-5920.primeirosestudos.1999.104863.

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Çiçek, Erdoğan. « Recent status of exotic tilapia species in Turkey ». Ege Journal of Fisheries and Aquatic Sciences 38, n^o 1 (15 mars 2021) : 111–16. http://dx.doi.org/10.12714/egejfas.38.1.14.

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One of the most controversial issues in Turkey about the occurrence of the exotic fish species belonging to the family Cichlidae. Up to date, starting the 1970’s a total of seven species including Coptodon rendalli, C. zillii, Oreochromis aureus, O. mossambicus, O. niloticus, Sarotherodon galilaeus and Tristramella simonis introduced to Turkey for aquaculture purposes or accidently. Then these species have deliberately released or escaped from research and aquaculture facilities establishing themselves into natural environment of Turkey. In other cases, tilapia have been introduced into new aquatic habitats via aquarists or ornamental fish farmers. There was not any reliable record about establishment of O. mossambicus, S. galilaeus and T. simonis in Turkey. It is observed that now C. rendalli, C. zillii, O. aureus, and O. niloticus and/or hybrids of them exist in the wild water system of Turkey. Another problematic issue is that species identification of specimens found in nature is impossible due to the fact that hybridization of different species of Cichlidae. By the way, the range of the species belonging to the family Cichlidae in Turkey is determined that a need for detailed genetic studies to assess the current status.

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Gonçalves, Clézio Roberto, Maria Mendes Correa da Costa et Valter De Carvalho Dias. « Compreendendo norma linguística para desatar outros nós ». Tabuleiro de Letras 12, n^o 2 (18 décembre 2018) : 103. http://dx.doi.org/10.35499/tl.v12i2.5526.

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Resenha do livro Para Conhecer Norma Linguística, de autoria de Carlos Alberto Faraco e Ana Maria Zilles, publicado pela Editora Contexto em 2017, que traz em suas 219 páginas os principais questionamentos sobre ideia de norma, sobretudo na Língua Portuguesa, fazendo com que seus leitores compreendam o seu conceito em diferentes contextos, contribuindo para o ensino de uma língua que respeite, acima de tudo, as variedades.

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MINOUNGOU, Mahamoudou, ,. Raymond OUEDRAOGO, Nomwine DA et Adama OUEDA. « Relation longueur-poids et facteur de condition de sept espèces de poisson du réservoir de Samandeni avant son ouverture à la pêche (Burkina Faso). » Journal of Applied Biosciences 151 (31 juillet 2020) : 15559–72. http://dx.doi.org/10.35759/jabs.151.5.

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Objectif : Fournir les premières données sur l’ichtyofaune du réservoir de Samandeni avant son ouverture à la pêche à travers l’étude de la relation longueur-poids et de facteur de condition de sept espèces dominantes dudit réservoir. Méthodologie et résultats : Les poissons ont été collectés entre avril 2018 et janvier 2019 à travers des pêches expérimentales aux filets épervier et maillant. Sept espèces dominantes du réservoir à savoir Sarotherodon galilaeus (Mango tilapia), Coptodon zillii (Redbelly tilapia), Oreochromis niloticus (Tilapia du Nil), Marcusenius senegalensis (Trunkfish), Synodontis schall (Wahrindi), Schilbe intermedius (African butter catfish) et Brycinus nurse (Nurse tetra) ont été soumises à l’étude de la relation longueur-poids (RLP) et de facteur de condition. Les régressions longueur-poids, appliquées ici, ont donné des coefficients d’allométrie situés entre 2,86 et 3,20 avec des coefficients de détermination qui varient de 0,7312 à 0,9443. Conclusion et application des résultats: Ces résultats qui sont d’une grande importance dans la modélisation de l’écosystème du réservoir de Samandeni, décrivent une croissance isométrique pour les sept espèces étudiées. En référence aux facteurs de condition, Sarotherodon galilaeus, Coptodon zillii, Oreochromis niloticus et Brycinus nurse présentent de bon état de forme. Mots clés : ichtyofaune, relation longueur-poids, facteur de condition, réservoir de Samandeni, Burkina Faso. Weight–length relationships and condition factor of seven species of fish from Samandeni reservoir before it was opened to fishing (Burkina Faso). ABSTRACT Objective: To provide the first data of the ichthyofauna of the Samandeni reservoir before it is opened to fishing through the study of the length-weight relationship and condition factor of seven dominant species of the said reservoir. Methodology and Results: The fish were collected between April 2018 and January 2019 through experimental fishing with hawk and gillnets. Seven dominant species of the reservoir, namely Sarotherodon Minoungou et al., J. Appl. Biosci. 2020 Relation longueur-poids et facteur de condition de sept espèces de poisson du réservoir de Samandeni avant son ouverture à la pêche (Burkina Faso). 15560 galilaeus (Mango tilapia), Coptodon zillii (Redbelly tilapia), Oreochromis niloticus (Nile Tilapia), Marcusenius senegalensis (Trunkfish), Synodontis schall (Wahrindi), Schilbe intermedius (African butter catfish) et Brycinus nurse (Nurse tetra) were subjected to the study of the length-weight relationship and condition factor. The length-weight regressions applied here gave allometric coefficients between 2.86 and 3.20 with coefficients of determination varying from 0.7312 to 0.9443. Conclusion and Application of results: These results, which are of great importance in the modelling of the ecosystem of the Samandeni reservoir, describe isometric growth for the seven species studied. With reference to the condition factors, Sarotherodon galilaeus, Coptodon zillii, Oreochromis niloticus and Brycinus nurse are in good shape. Keywords: ichtyofauna, weight–length relationships, condition factor, Samandeni reservoir, Burkina Faso.

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EISSA, IAM, S. N. ABOU-ELGHEIT, A. A. DESSUKI, A. A. I. HASSANIN et L. T. MOSTAFA. « Advanced diagnosis of vibriosis among some marine fishes in lake Temsah, Egypt ». Journal of the Hellenic Veterinary Medical Society 70, n^o 1 (24 avril 2019) : 1339. http://dx.doi.org/10.12681/jhvms.20338.

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Vibriosis is a serious disease affecting marine water fishes. The present study was applied on 320 marine fishes of four equal different species (Sparus auratus, Mugil cephalus, Mugil seheli and Tilapia zillii) each 80. Fishes were collected seasonally and randomly from Lake Temsah in Ismailia governorate from September2015 to August 2016. The signs and lesions of severe septicemia, hemorrhages and ulcerations were observed among the examined fishes. Isolated bacteria were observed as yellow and green pigmented colonies on TCBS media, and as creamy colored colonies on TSA media with 2.5% NaCl concentration. The causative agent was identified as vibrio sp. Concerning gene expression, most isolates were molecularly identified using the pvsA gene primers giving a product size of 338-bp size and 348-bp for V. alginolyticus and V. parahemolyticus respectively. The highest prevalence of vibriosis was recorded in T. zillii (63.75%), M.seheli (37.5%) then M.cephalus and Sparus auratus (28.75%) while the total prevalence was (39.69%). The highest seasonal prevalence was recorded in summer (81.25%) followed by spring (35%) then autumn (23.75%) and winter (18.75%). The highest prevalence of organ specifity was in liver, kidneys then spleen and gills. The histopathological studies showed activation of melanomacrophage centers, degeneration, necrosis and congestion in liver, kidney, spleen, and gills.

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Szitenberg, Amir, Menachem Goren et Dorothée Huchon. « Mitochondrial and morphological variation of Tilapia zillii in Israel ». BMC Research Notes 5, n^o 1 (2012) : 172. http://dx.doi.org/10.1186/1756-0500-5-172.

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Pfeiffer, Peter C. « Literarische Ökonomik ed. by Iuditha Balint and Sebastian Zilles ». German Studies Review 39, n^o 1 (2016) : 161–63. http://dx.doi.org/10.1353/gsr.2016.0006.

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El-Sayed, Abdel-Fattah M. « Evaluation of Semipurified Test Diets for Tilapia zillii Fingerlings ». Journal of the World Aquaculture Society 20, n^o 4 (décembre 1989) : 240–44. http://dx.doi.org/10.1111/j.1749-7345.1989.tb01009.x.

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Johnsen, Peter B., et Michael A. Adams. « Chemical feeding stimulants for the herbivorous fish, Tilapia zillii ». Comparative Biochemistry and Physiology Part A : Physiology 83, n^o 1 (janvier 1986) : 109–12. http://dx.doi.org/10.1016/0300-9629(86)90096-4.

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Marr, Mirko. « Nicole Zillien : Digitale Ungleichheit ». Medien & ; Kommunikationswissenschaft 55, n^o 4 (2007) : 627–28. http://dx.doi.org/10.5771/1615-634x-2007-4-627.

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GÜLER, Kadir. « ZİLELİ CEYHUNÎ'NİN BİLİNMEYEN DÎVÂNI ». Journal of Academic Social Science Studies 5, Number : 69 (1 janvier 2018) : 93–104. http://dx.doi.org/10.9761/jasss7747.

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Ezemonye, Lawrence, Thomas Ikpesu et Isioma Tongo. « Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, Nigeria ». Archives of Industrial Hygiene and Toxicology 59, n^o 4 (1 décembre 2008) : 261–70. http://dx.doi.org/10.2478/10004-1254-59-2008-1906.

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Distribution of Lindane in Water, Sediment, and Fish from the Warri River of the Niger Delta, NigeriaThis paper is the first attempt to quantify the levels and the distribution pattern of lindane in the surface water, sediment and fish (Chrysichthys furcatus and Tilapia zilli). The samples were collected from three stations (Ovwian, Ekakpamre, and Ovu) of the Warri River in the western Niger Delta of Nigeria in 2006: during the dry (January-April) and wet seasons (May-August). The analysis included a total of 96 samples made up of 24 samples each for water, sediment, and fish. The pesticide levels were analysed using high performance liquid chromatography to elucidate its distribution in various environmental compartments. Residue levels in the matrices ranged from below the detection limit (BDL) to 1.37μg L-1 in water, BDL to 12.66 μg g-1 dry weight (dw) in sediment, BDL to 16.67 μg g-1dw in Chrysichthys furcatus, and BDL to 0.15 μg g-1dw in Tilapia zilli. The observed values were above the ecological benchmarks (0.01 μg L-1) recommended by the Nigerian Environmental Protection Agency and European Union. They were also relatively higher than in previous studies on the Nigerian environment, which calls for regular monitoring of the Niger Delta water bodies.

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Nobah, Céline Sidonie Koco, Kouakou Augustin Kouame, Safiatou Coulibaly, Boua Célestin Atse et Essetchi Paul Kouamelan. « Habitudes alimentaires du Coptodon hybride issu des croisements naturels entre Coptodon zillii (Gervais, 1848) et Coptodon guineensis (Günther, 1862) de la lagune Ebrié (Côte d’Ivoire) ». International Journal of Biological and Chemical Sciences 13, n^o 7 (13 février 2020) : 3307–19. http://dx.doi.org/10.4314/ijbcs.v13i7.26.

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Coptodon hybride est un poisson issu des croisements naturels entre Coptodon zillii X Coptodon guineensis. La présente étude a pour objectif de caractériser les habitudes et les stratégies alimentaires de ce poisson, en fonction de la taille des individus, des stations d’échantillonnage et des saisons hydrologiques dans la lagune Ebrié (Côte d’Ivoire). Sur un total de 323 individus (65< longueur standard ≤ 225 mm) capturés d’août 2014 à juillet 2015 avec des filets maillants, 236 tubes digestifs contenaient des proies et 87 étaient vides (26,93%). L’Indice d’Importance Relative (%IRI) qui prend en compte les pourcentages d’occurrence, numérique et pondérale, a été utilisé pour évaluer l’importance relative des différentes catégories de proies dans les tubes digestifs. Cinq groupes de proies ont été identifiés : insectes, zooplancton, crustacés, phytoplancton et plantes terrestres. Le régime alimentaire de Coptodon hybride est essentiellement constitué de plantes terrestres, surtout de débris végétaux (91,53% de l’IRI). L’analyse du coefficient de corrélation de Spearman montre une variation du régime en fonction de la taille et des stations. Cependant, il n’y a pas d’influences significatives des saisons sur l’alimentation des individus de petites tailles (65-129 mm) et ceux de grandes tailles (130-225 mm).Mots clés: Habitudes alimentaires, Coptodon hybride, lagune Ebrié, Côte d’Ivoire. English Title: Feeding habits of hybrid Coptodon resulting from natural crosses between Coptodon zillii (Gervais, 1848) and Coptodon guineensis (Bleeker, 1862) in the Ebrié lagoon (Côte d'Ivoire)Hybrid Coptodon is a fish resulting from natural crosses between Coptodon zillii X Coptodon guineensis. The objective of this study is to characterize the feeding habits of this fish, according to the size of individuals, sampling sites and hydrological seasons in the Ebrié lagoon (Côte d'Ivoire). A total of 323 specimens (65< standard length ≤ 225 mm) were captured from August 2014 to July 2015 with gillnets. hundred and thirty-six digestive tracts contained prey and 87 were empty (26.93%). The Relative Index (%IRI), including the occurrence, numerical and weight percentages, was used to assess the importance of the different categories of prey in the digestive tract. Five groups of prey have been insects, zooplankton, crustaceans, phytoplankton and terrestrial plants. The hybrid tilapia’s diet shows terrestrial plants and plant debris (91.53% of IRI). The Spearman correlation coefficient analysis variations as a function of size and sample sites. However, there are no significant seasonal influences diet of small (65-129 mm) and large (130-225 mm) fish.Keywords: Feeding habits, hybrid Coptodon, Ebrié lagoon, Côte d’Ivoire.

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Kinta, Mohammed Jr, A. V. Ayanwale, U. N. Keke, Y. I. Auta, B. S. Adama et H. Usman. « PHYSICO-CHEMICAL AND SOME HEAVY METALS CONCENTRATION ANALYSES ON THREE COMMON SPECIES OF FISH IN TUNGAN KAWO RESERVOIR KONTAGORA, NIGER STATE, NIGERIA ». FUDMA JOURNAL OF SCIENCES 5, n^o 1 (26 juin 2021) : 223–32. http://dx.doi.org/10.33003/fjs-2021-0501-559.

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Developing countries like Nigeria are faced with increased in generation of domestic, industrial and agricultural wastes, with a large percentage moving. This study evaluates the physico-chemical and some heavy metals concentration in three common species of fish from Tungan Kawo reservoir Kontagora, Nigeria; using standard methods between (July 2018 – February 2019); at four different sampling stations of human activities on the water. Five heavy metals were evaluated (Lead, Copper, Manganese, Iron and Chromium) in the fish samples. Phosphate (0.4 – 2.5) mg/L, Nitrate (3.2 – 7.5) mg/L, Temperature (27 – 32.4) 0C, Dissolved Oxygen (2.4 – 5.2 mg/L), Conductivity (81 – 125 µS/cm), Biochemical Oxygen Demand (1.9 – 4.4 mg/L), Alkalinity (mg/L) and Total Dissolved Solids (117 – 198) ppm were within the standard for drinking water and survival of fish. However, the pH (6.3 – 9.8) was above the standard for NIS and WHO drinking water but can support aquatic life. Iron (0.64 ± 0.072 mg/kg) was the most highly concentrated in Synodontis clarias while lead (0.01 ± 0.013 mg/kg) was the lowest in Oreochromis niloticus and Coptidon zillii (formerly Tilapia zillii. This current finding indicates that the water is safe for both aquatic life and domestic purpose but not suitable for direct human consumption without being properly treated. However, there is the need for regular monitoring of the heavy metals load in this water body and the aquatic organisms because of the long term effects

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SALAMA, Fawzy, Monier ABD EL-GHANI, Mohamed GADALLAH, Salah EL-NAGGAR et Ahmed AMRO. « Variations in Vegetation Structure, Species Dominance and Plant Communities in South of the Eastern Desert-Egypt ». Notulae Scientia Biologicae 6, n^o 1 (12 mars 2014) : 41–58. http://dx.doi.org/10.15835/nsb619191.

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For two successive years, the floristic diversity and vegetation composition in the southern part of the Eastern Desert ofEgypt were investigated through four transects (3 crossing the Eastern Desert and one along the Red Sea). The data collected from 142 stands covering the study area included the species composition, functional groups, chorology and occurrences (Qvalues). A total of 94 plant species belonging to 33 different families were recorded, with Asteracea, Zygophyllaceae, Fabaceae,Poaceae, Chenopodiaceae and Brassicaceae as the largest families. Shrubs represented the largest functional group (39.4%), while perennial herbs represented the smallest ones (12.8%). Species occurrence (Q-value) revealed that Zilla spinosa, Acacia tortilis subsp raddiana, Morettia philaeana, Caroxylon imbricatum, Zygophyllum coccineum and Citrullus colocynthis had wide ecological range of distribution (dominant species, Q-values 0.2). Saharo-Arabian chorotype was highly represented (72.6 %) in the flora of this area, eventually as mono, bi or pluriregional. Classification of the data set yielded 7 vegetation groups included: (A) Zilla spinosa-Morettia philaeana, (B1) Zilla spinosa-Citrullus colocynthis-Morettia philaeana, (B2) Zilla spinosa, (C1)Zygophyllum album-Tamarix nilotica, (C2) Zygophyllum coccineum-Tamarix nilotica, (D1) Zilla spinosa-Zygophyllum coccineum and (D2) Zilla spinosa-Acacia tortilis subsp. raddiana-Tamarix aphylla-Balanites aegyptiaca. Certain vegetation groups were assigned to one or more transects. Detrended Correspondence Analysis (DCA) revealed that electrical conductivity, sodium, potassium, calcium, magnesium, chlorides, moisture content, sulphates, pH, organic matter and gravel were the soil variables that affect the species distribution in this study.

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Johnsen, P. B., H. Zhou et M. A. Adams. « Gustatory sensitivity of the herbivore Tilapia zillii to amino acids ». Journal of Fish Biology 36, n^o 4 (avril 1990) : 587–93. http://dx.doi.org/10.1111/j.1095-8649.1990.tb03559.x.

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Neat, F. « Plasma concentrations of sex steroids and fighting in maleTilapia zillii ». Journal of Fish Biology 54, n^o 3 (mars 1999) : 695–97. http://dx.doi.org/10.1006/jfbi.1998.0897.

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