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Adam C.D. Barlow Md. Ishtiaq U. Ahmed Md. Mizanur Rahman 《Biological conservation》2008,141(8):2032-2040
Baseline data on distribution and abundance of tigers in the Sundarbans is required to identify problem areas and evaluate management strategies. This paper outlines a khal (creek) bank survey of track set frequency throughout the Bangladesh Sundarbans to aid formulation of a management-driven monitoring program. Three teams of two observers surveyed a total of 1 201 km of waterways throughout the Sundarbans, recording 1 338 tiger track sets. These sets became unrecognizable as tiger sign after a mean 10 days (range 6-14). Proportion of detectable sign recorded was 0.91. Mean (±standard error) sample unit track frequency was 1.12 ± 0.86 track sets/km of khal. The mean coefficient of variance in sample unit track rate, estimated by multiple counts of six sample units, was 0.21 (range 0.06-0.34). Track frequency generally increased from northeast to southwest. Four sample units (6%) had signs of reproduction, with a mean litter size of 1.75 ± 0.5. Monte Carlo simulation suggests a monitoring program of one complete survey every two years will have power of 0.8 (α = 0.2), to detect track frequency declines of ?19% and increases of ?17%. We recommend this monitoring scheme be implemented on the Indian side of the Sundarbans to provide a standard assessment of the tiger population and to form the basis for setting management objectives and evaluating transboundary conservation initiatives. 相似文献
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Muslum Kuzu Abdulselam Aslan Ishtiaq Ahmed Veysel Comakli Ramazan Demirdag Naim Uzun 《Fish physiology and biochemistry》2016,42(2):483-491
Glucose-6-phosphate dehydrogenase (G6PD) and glutathione reductase (GR) are metabolically quite important enzymes. Within this study, these two enzymes were purified for the first time from the gills of Lake Van fish. In the purifying process, ammonium sulfate precipitation and 2′,5′-ADP Sepharose 4B affinity column chromatography techniques for glucose-6-phosphate dehydrogenase, temperature degradation and 2′,5′-ADP Sepharose 4B affinity column chromatography for glutathione reductase enzyme were used. The control of the enzyme purity and determination of molecular weight were done with sodium dodecyl sulfate polyacrylamide gel electrophoresis. K M and V max values were determined with Lineweaver–Burk plot. Besides, the effects of some chalcone derivatives on the purified enzymes were analyzed. For the ones showing inhibition effect, % activity–[I] figures were drawn and IC50 values were determined. K i value was calculated by using Cheng–Prusoff equation. 相似文献
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Naseer Ahmad Faizan Ullah Ishtiaq Hussain Khalid Ahmad Ghulam Raza Yasar Sajjadc 《Communications in Soil Science and Plant Analysis》2016,47(15):1751-1763
The aim of the present investigation was to determine the phytotoxic effect of aqueous extract from fresh and oven-dried leaves and roots of soybean plants on maize growth and on rhizosphere soil. The extract prepared from fresh leaves of drought-stressed soybean plants significantly increased the accumulation of proline, soluble sugar, and endogenous abscisic acid (ABA) content of maize-treated plants. Increase in antioxidant activity like superoxide dismutase (SOD), peroxidase (POD), ascorbate peroxidase (APX), catalase (CAT), and endogenous ABA was recorded in treated plants. The soybean leaf extracts prepared from drought-stressed plants significantly decreased the soil pH and electrical conductivity (EC) of maize cultivated soil. The soybean drought-stressed leaf extracts prepared plants were found more effective in modulating the physiology of maize, indicating the higher allelopathic potential of soybean. 相似文献
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Asia Nosheen Humaira Yasmin Rabia Naz Asghari Bano Rumana Keyani Ishtiaq Hussain 《Soil Science and Plant Nutrition》2018,64(4):520-525
Effective management of the nutrients and enzyme activity in the soil is necessary for maximum crop growth and productivity. However, the excessive use of chemical fertilizers (CFs) not only adversely affects the soil nutrient status and soil physicochemical properties but also aids pollution to the ecosystem. The objective of present study was to investigate the effect of single as well as combined applications of phosphate-solubilizing bacteria and agrochemicals on important soil enzyme activities and their impact on the growth of kasumbha (safflower). Pseudomonas putida (P. putida;106 cells/mL) was applied as seed inoculation prior to sowing, and CFs were applied as full, half, and quarter doses during sowing to modulate the growth of kasumbha host plants. P. putida in combination with half dose of CFs (PH) increased the soil urease and phosphatase activities, while P. putida combined with quarter dose of CFs (PQ) augmented the soil invertase activities. Moreover, the PQ treatment exhibited the maximum colony-forming units of P. putida. Leaf chlorophyll, carotenoids, protein contents, and root lengths were increased by PH treatment. Whereas, shoot length and leaf area were improved by PH and PQ treatments, respectively. Leaf protease activity was enhanced by P. putida in combination with full dose of CFs and PQ treatments, while leaf phosphate contents were significantly improved by PQ treatment. It can be concluded that P. putida in combination with half as well as quarter doses of CFs is a promising approach for the improvement of soil enzyme activities and growth of kasumbha and replacing 50% of the use of CFs. 相似文献
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Ali Tahir Ishtiaq Ayesha Mushtaq Iram Ayaz Neelum Jan Muhammad Ishtiaq Khan Wajiha Khan Uzma Murtaza Iram 《Plant foods for human nutrition (Dordrecht, Netherlands)》2021,76(4):501-506
Plant Foods for Human Nutrition - Diabetic kidney disease is one of the most common microvascular complications of diabetes mellitus with consequences of diabetic nephropathy. Here we amined to... 相似文献
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Four new pyrenocines, named pyrenocines J-M (1-4), were isolated from an endophytic fungus, Phomopsis sp, by a bioassay-guided method. The structures of the new compound have been assigned from 1H and 13C NMR spectra, DEPT, and by 2D COSY, HMQC, and HMBC experiments. Preliminary studied showed that compounds 1, 2 and 4 showed good antifungal, antibacterial, and algicidal properties, while compound 3 had good antibacterial and algicidal properties. 相似文献
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Ishtiaq Ahmad Rajwana Nabila Tabbasam Aman Ullah Malik Saeed Ahmad Malik Mehboob-ur-Rahman Yusuf Zafar 《Scientia Horticulturae》2008
Knowledge about the extent of genetic diversity/relatedness in mango germplasm is vital for developing coherent strategies for future gains in productivity. The genetic diversity/relatedness among mango cultivars/genotypes developed in Pakistan has not been investigated previously. We have assessed the genetic diversity among 25 mango genotypes/cultivars using randomly amplified polymorphic DNA (RAPD). Sixty random ten-mer primers were surveyed, out of which 45 yielded amplicons in all the genotypes. Genetic similarity between genotypes/cultivars was in the range of 64–89% with an average of 74%. Similarly, the genetic relatedness among all variants derived from a mango cultivar Chaunsa was in the range of 81.18–88.63%. These coefficients were utilized to construct a dendrogram using the unweighted pair group of arithmetic means (UPGMA). The genotypes were grouped into three (A, B, C) clusters. Generally, genotypes originating from Pakistan were grouped in cluster ‘A’ while cluster ‘B’ primarily composed of southern India as well as Florida cultivars. Kensington Pride was the most distantly related genotype which grouped with Maya and Yakta, forming a distinct cluster ‘C’. 相似文献
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Shamsher Ali Hussain Ishtiaq Hussain Shabir Hussain Azhar Ali Haibat Ali Meher 《Eurasian Soil Science》2019,52(10):1159-1169
Eurasian Soil Science - This study aims to determine variation in soil physical, chemical and microbial properties along altitudinal gradients in fragile mountains region of the Karakoram. The soil... 相似文献