Open access journal of fisheries and aquatic science issn 18164927 doi. To understand the genetic variations and population structure in nigerias niger delta. Easily combine multiple files into one pdf document. Conatus pharmaceuticals mergers and acquisitions summary mergr. Chrysichthys nigrodigitatus lacepede, 1803, an endangered. Chrysichthys nigrodigitatus lacepede 1802 is a common silver coloured african catfish occurring in nigeria and several west african countries. Fecundity, gonadosomatic index and spawning period of. There are currently 42 recognized species in this genus. The major fishing methods employed for collecting the 600 specimens were cast netting and set netting. Chrysichthys is a genus of claroteid catfishes native to africa. However, it is not a legal authority for statutory or regulatory purposes. The general trend of accumulations in all the organisms were chrysichthys nigrodigitatus tilapia zillii macrobrachium macrobrachion. Health status of chrysichthys nigrodigitatus in response to aquatic pollution in epe, lagos and ologe lagoons, southwest nigeria kingsley chukwuemeka kanu1, emmanuel taiwo idowu2 1department of environmental management and toxicology, michael okpara university of agriculture, pmb 7267 umudike, nigeria. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties.
Department of biological sciences, faculty of science, niger delta university, wilberforce island, bayelsa state, 2. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. Histopathological alterations in the liver and kidney. Feeding interrelationship of caranx hippos ligneous. Absolute fecundity of 28 086 eggs found in 64 cm fish in this study is the highest so far reported for c. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in.
Chrysichthys nigrodigitatus lacepede, 1802, also known as silver catfish, occurs in africa, including nigeria. This webapp provides a simple way to merge pdf files. Hosted by the usgs core science analytics and synthesis. Chrysichthys nigrodigitatus lacepede, 1803 discover life. Fingerlings of chrysichthys nigrodigitatus were fed four isocaloric diets at different crude protein levels to determine the optimum protein requirement of the species. Experimental study area the study area for the investigation is the lagos lagoon and agboyi creek. The potential dispersal of the adult and juveniles limited gene flow among locations. Merge pdf online combine pdf files for free foxit software. Page designed through the cooperative efforts of interagency itis teams. One hundred chrysichthys nigrodigitatus were randomly selected from the new calabar river to determine the effect of size and sex on the endoparasitaemia in the blood, heart, liver, kidney and gastrointestinal tract. The general trend of accumulations in all the organisms were chrysichthys nigrodigitatustilapia zillii macrobrachium macrobrachion.
Helminth bioload of chrysichthys nigrodigitatus lacepede. Discover lifes page about the biology, natural history, ecology, identification and distribution of chrysichthys nigrodigitatus lacepede, 1803 discover life. Lengthweight relationship and condition factor of silver. This free online tool allows to combine multiple pdf or image files into a single pdf document. Pdf reproductive strategy of chrysichthys nigrodigitatus. Endoparasitaemia of chrysichthys nigrodigitatus in a tidal. Study of the feeding interrelationship of caranx hippos, chrysichthys nigrodigitatus, ethmalosa fimbriata and mugil cephalus in the lagos lagoon, nigeria, revealed that algae and diatoms formed the main food items of the four fish species. Genetic diversity of chrysichthys nigrodigitatus in the lagos. Endoparasitic fauna of chrysichthys nigrodigitatus. The specimens of chrysichthys nigrodigitatus displayed the highest values of opw, nbl, mbll1 and mbll3. The lowest length frequency 1 through the months was estimated for class 8185cm,9195cm and 101105cm. The results indicated different habitat responsible for its current genetic structure. The uptake of the pesticides lindane, pentachlorophenol pcp, and propoxur, which are frequently used on farms, and in industries as well as by loggers and timber men on wood were studied in concrete ponds at the university of cape coast, in ghana. Dec 21, 2017 image 1739001 is of nomuraea fungus nomuraea rileyi symptoms on soybean looper.
The results showed low levels of genetic diversity in the kaduna river. It is a highly valuable fish species amongst the indigenous african populations. Fecundity, gonadosomatic index and spawning period of chrysichthys nigrodigitatus of the lower cross river, nigeria. It implied an urgent need to adopt protection measures to protect it. A case study of new calabar river basin theodore athanasius allison department of anatomy, faculty of basic medical science, college of health sciences, university of port harcourt, nigeria. Studies were carried out to determine the toxicity of some selected pesticides on fresh water fish in a tropical environment. The modal length frequency 78 was estimated for class 3635cm. It occurs in shallow waters of lakes nigrodigitatus of the two other species c. Lagos lagoon lies between latitude 6o266 o37 n and longitude 3234o20 e while agboyi creek lies around. Helminth bioload of chrysichthys nigrodigitatus lacepede 1802 from lekki lagoon lagos, nigeria.
Photomicrograph of section of liver of chrysichthys nigrodigitatus. Pdf merge combine pdf files free tool to merge pdf online. Eleven samples of chrysichthys nigrodigitatus and one sample c. The mean concentration mean sd of tbars in the liver of c. Please practice handwashing and social distancing, and check out our resources for adapting to these times. The morphometry and diet of chrysichthys nigrodigitatus in epe lagoon were investigated between january and july 2008.
Research article proximate composition of nutrients in fresh. Endoparasitic fauna of chrysichthys nigrodigitatus lacepede. Proximate and mineral quality changes in fillets of three. Significant differences p nomuraea rileyi symptoms on soybean looper. Genetic diversity of chrysichthys nigrodigitatus in the. Proximate and mineral quality changes in fillets of three fish species mugil cephalus, chrysichthys nigrodigitatus and oreochrumis niloticus at frozen storage sub 0c afamdi anene 1, ogan i. Morphometry and diet of chrysichthys nigrodigitatus.
Chrysichthys nigrodigitatus and liza grandisquamis, two fishes that are commonly consumed in nigeria. How to merge pdfs and combine pdf files adobe acrobat dc. The fish is common in the niger delta where it is a valued source of protein and constitutes the dominant. Combine multiple pdf files into one pdf, try foxit pdf merge tool online free and easy to use.
Some reproductive aspects of chrysichthys nigrodigitatus. Cellular biomarker responses of bagrid catfish, chrysichthys. Our pdf merger allows you to quickly combine multiple pdf files into one single pdf document, in just a few clicks. Genetic diversity and population structure of chrysichthys. It occurs in shallow waters of lakes nigrodigitatus pdf jul 1, 2019 admin automotive the silver catfish, chrysichthys nigrodigitatus lacepede. Soda pdf merge tool allows you to combine pdf files in seconds. Bioaccumulation of heavy metals and parasitic fauna in. The formolether concentration method was used to examine the samples.
They belong to the bagridae family and are native to africa. The lengthweight relationship and condition factor of. You can either select the files you want to merge from you computer or drop them on. The estuarine catfish chrysichthys nigrodigitatus is a prized food fish in nigeria especially in the niger delta region.
The lengthweight relationship and condition factor of chrysichthys nigrodigitatus lacep ede, 1803 from amassoma river flood plains. Imeheffects of different processing methods on the proximate composition of chrysichthys nigrodigitatus from great kwa river, nigeria european academic research vol. Conatus pharmaceuticals has acquired 1 company conatus pharmaceuticals has acquired in 1 us state. It is a widely distributed euryhaline species and inhabits most of the major rivers in africa including nigeria, senegal, gambia, ivory coast, liberia, zaire, and gabon ezenwa, 1981. There is a growing concern over the sustainability of the fishery in the face of climate change and environmental variability.
Claroteidae, with consideration of their biogeography beatrice adepogourene, guy g. This species was also characterized by the lowest values of hl, dsl, adl, anl, dsh, ed1, pth, anh, dplan and dplad table 1. In chrysichthys nigrodigitatus however, the orders of accumulation were gills 51. Health status of chrysichthys nigrodigitatus in response to.
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