Red snapper Lutjanus argentimaculatus (Forsk., 1775) is infected by the trematodes, cestodes, acanthocephala, nematode larvae and adults which cause damage to the intestine, stomach, liver, visceral mesenteries, kidney and spleen of the fish. Infection rate of nematode larvae found to be very heavy and produces destruction of all layers of stomach and intestine along with fibrosis of visral wall. Acanthocephala may also badly affect the gastric mucosa and granulomatous lesions are produced at the site of penetration and perforation was also produced with large granulomas on serous surface....

During the present investigation (2005-2007) a total of 791 fishes belonging to 14 families, 10 genera and 18 species were collected from different localities of West Wharf, Karachi. During present studies 18 trematode species were identified out of which 11 belong to the Family Hemiuridae, including 5 species of the genus Lecithocladium Luhe, 1909; 4 species of the genus Tubulovesicula, Yamaguti, 1934; 1 species of the genus Stomachicola Yamaguti, 1934 (Bilqees, 1971) and 1 species of the genus Prosogonotrema Perez Vigueras, 1940 (Bilqees and Durrani, 1980). One species of each of the...

Nematodes from fishes of Balochistan are described here. This is the first report on the nematodes of fishes of Balochistan. Twenty four species of genus Rhabdochona Railliet, 1916 have been indentified based on morphometric variations in the important diagnostic features such as number of prostomal teeth, shape and size of spicules, number and position of caudal papillae in males and position of vaginal opening, structure of vagina and eggs morphology in females. This information is important for students, teachers and researchers in the field of fish parasitology.

The Mango is classified as an evergreen and is in the Anacardiaceae family. It is the most important fruit crop of Sindh Province, Pakistan. The area under cultivation in Sindh is approximately 49983 hectares and the yield 352424 tonnes. In a survey of ten localities of Hyderabad and Karachi districts of Sindh, nine genera of nematodes and ten species were recorded. The population densities were measured and highest density was that of Tylenchorhynchus sp. (65/200 cm3). The effect of four plant extracts namely neem, marigold, eucalyptus and ashwagandha on the yield and nematode population...

Acanthocephala the thorny-headed worms are one of the important parasites of vertebrates including fish, amphibians, reptiles, birds and mammals. Several species are also reported from humans. This communication deals with a world record of acanthocephala of more than 200 years. A complete list of species belonging to various genera and families is given. Representative diagrams of each of the families are provided. In addition, structures of eggs, developmental stages and anatomical features are also included. This is the first comprehensive record of acanthocephala from 1775 to 1998. This...

The presence of large number of parasites is dangerous for a fish population, causes great loss of fisheries and fishing industry. Economic aspects of parasitic effects on fishes are mass mortality, weight losses, reduction in fish population and size of catches. Fish disease due to helminth parasites has an indirect and direct effect on the productivity of fish and on human health. The main aim of present work is to provide knowledge about the seasonal variation, intensity of parasitic infection, effect of length and sex on the infestation rate as well as parasitic communities found in this...

The liver tissue damage in the catfish was observed. Lobular arrangement and central veins were obscured. Atrophy of liver tissue with large spaces in between was obvious. Portal tract areas were congested, hepatocyte cord arrangement and shape was disturbed. Section of nematode larvae apparently viable was present in liver tissue. Proliferation of the bile duct in portal tract area was obvious resulting into bile duct hyperplasia. Liver tissue appeared congested, loosing the usual arrangement of hepatocyte cord. Central veins were obliterated. Sinusoids were dilated due to atrophy of liver...

Tissue changes in stomach and intestine were observed associated with nematode larvae infection. This infection causes disintegration of cellular organization of these organs. The changes like, fusion, atrophy of villi, epithelial cells and villous epithelium, sloughing of villi, lengthening of crypt gland and erosion and dislocation of gastric mucosa and shrinkage of tissue has also observed with the infection of acanthocephala, trematode, protozoan and nematode larvae. Lesion and inflammation in stomach and intestine also produced. Severe host tissue reactions resulting into degeneration of...