Khatoon Z.,Food and Marine Resources Research Center |
Paperno R.,Florida Fish And Wildlife Conservation Commission |
Hussain S.M.,National Animal Plant Inspection Services
Journal of Applied Ichthyology | Year: 2014
This paper provides length-weight relationships estimated for five fish species (four families) economically important not only to the local community, but to the larger Indo-Pakistan sub-continent. All fish were collected from the Manora Channel and backwater creeks near Karachi, Pakistan in the northern Arabian Sea during July 2000 to October 2002. These represent the first reports of length-weight data for two species (Sardinella sindensis and Pomadasys stridens) while also providing additional data on the remaining three species (Alepes kleinii, A. melanoptera, and Liza carinata) for which limited information was available. Estimated b values obtained for the six species ranged from a minimum of 2.310 for L. carinata to a maximum of 3.082 for S. sindensis. © 2013 Blackwell Verlag GmbH.
Abbas G.,University of Karachi |
Siddiqui P.J.A.,University of Karachi |
Jamil K.,Food and Marine Resources Research Center
Pakistan Journal of Zoology | Year: 2012
In order to investigate optimum dietary protein requirement, juvenile mangrove red snapper Lutjanus argentimaculatus (body weight 8.0±0.3 g) were reared in seawater tanks (125 liters each) and fed one of the experimental diets at a daily ration of 2% body weight for 90 days. Six isoenergetic (22.4 kJg -1) diets were formulated to contain protein levels of 20%, 25%, 30%, 35%, 40% and 45%. Fish fed diets of 40% and 45% protein produced higher weight gain and growth rate than those of the other diets. Broken line regression analysis yielded an optimal protein level of 42.8%. Fish whole body, muscle, liver and visceral composition showed that moisture content of fish fed diets of 40% and 45% protein was significantly higher than that of fish fed diets containing protein levels of 20% to 35% in 5% increments, although the lipid contents were lower. No significant difference was observed in protein and ash contents of whole fish or body organs for the diets of 20% to 45% protein. Fish fed 40% and 45% protein diets showed higher nitrogen gain and nitrogen retention efficiency than those fed on other diets. The mesenteric fat, hepato- and viscerosomatic indices of fish fed diets of 40% and 45% protein were significantly higher than those of fish fed diets of 20%, 25%, 30% and 35% protein. Based on the biological data, it was estimated that the optimal level of protein for L. argentimaculatus weighing between 8.0 g and 110 g was 40% to 42.8%. Copyright 2012 Zoological Society of Pakistan.
Haq M.Z.U.,University of Karachi |
Ahmad M.,University of Karachi |
Akhter M.,Food and Marine Resources Research Center
Pakistan Journal of Botany | Year: 2010
Nematicidal activity of selected medicinal plants has been carried out to evaluate their potential toxicity against juveniles of the root-knot nematode Meloidogyne spp and Cephalobus litoralis. In vitro results showed that ethanolic extract of these plants caused appreciable mortality of second stage juveniles of M. javanica and M. incognita as well as Cephalobus litoralis. The concentrations used @ 2% and 1% were found more effective and produced significant results as compared to 0.5%, and 0.25%. The mortality rate increased with increasing exposure time for most of the extracts.
Sultana N.,Pharmaceutical Research Center |
Akhter M.,Food and Marine Resources Research Center |
Khatoon Z.,Food and Marine Resources Research Center
Natural Product Research | Year: 2010
Studies on the aerial parts of Rubus niveus yielded six known compounds, 3,5-dihydroxy benzoic acid C7H6O4, (1), gallic acid C7H6O5 (2), ethyl galactoside (3), oleanolic acid (4), β-sitosterol (5) and 3-O-[β-D-galactopyranosyl- (12)-D-glucopyranoside (6). Besides this, a gallic acid derivative with methyl substitution was synthesised as tetramethyl gallate (3). Together with this derivative, compounds 1, 2, the alcohol soluble, chloroform soluble and petroleum ether soluble extracts of the aerial parts of R. niveus were screened for its nematicidal activity against freshly hatched second stage juveniles of Meloidogyne incognita (root-knot nematode), exhibiting 100, 94, 100, 52, 45 and 14% mortality, respectively of M. incognita after 48 h at 0.5% concentration. Compounds 1, 2 and 3 were found to be more potent than the nematicide Azadirachta indica at the same concentration. Negative results were obtained for nematicidal activity of the petroleum ether extract of R. niveus leaf extract. This is the first report on the isolation of chemical constituents as well as the nematicidal activity of compounds and any part of R. niveus. © 2010 Taylor & Francis.
Sultana R.,Food and Marine Resources Research Center |
Jamil K.,Food and Marine Resources Research Center
Marine Biodiversity Records | Year: 2013
This paper reports the first record of the occurrence of Pinna fragilis from Korangi Creek, Pakistan coast (24°47′N 67°11′E). A description of the species collected from the Pakistan coast is given along with size, habitat, ecology and economic importance. Shells of 114-347 mm were found from the area. The dark grey pearls of dull lustre were found from few shells. © Marine Biological Association of the United Kingdom 2013.