Papers by Dr. Md. Aminur Rahman, Dept. of FMB ,JUST
Uttar Pradesh Journal of Zoology, Aug 23, 2022
Preliminary investigation on crude extracts from two fire coral species, Millepora dichotoma (Md)... more Preliminary investigation on crude extracts from two fire coral species, Millepora dichotoma (Md) and Millepora platyphylla (Mp), those found along the Egyptian Red Sea coast of Marsa Alam, were collected for bioactivity screening. The bacterial activity and hemolytic effect of the methanol (MeOH), ethanol (EthOH) and dichloromethane (DCM) crude extracts of Md and Mp coral species were tested for their activity against various bacteria, namely; Klebsiela sp., Escherichia coli, Bacillus cereus and Staphylococcus aureus, while hemolytic effects of the crude extracts were tested on human red blood cells (RBC). The results showed differential effects of all coral crude extracts on the tested bacteria, while no hemolytic signs were detected among all the RBC samples. It is recommended to enhance the crude extracts studies form fire corals species as it could be a challenge to use them in safe medical and pharmaceutical applications.
Uttar Pradesh Journal of Zoology, Sep 8, 2022
Because of the pivotal role of the substrate composition in the ecological state of coral reef co... more Because of the pivotal role of the substrate composition in the ecological state of coral reef communities, the present study was attempted to investigate the substrate cover, coral reefs, and reef fishes in the marine ecosystem of the Wadi El-Gemal National Park (WGNP), Red Sea, Egypt. The surveys were conducted in the Spring and Autumn of 2015 by SCUBA diving and/or snorkeling. We applied the Point, Line, and Belt Intercept Transect (PIT, LIT and BLT) methods, to assess the state and forms of the substrate, through a quantitative assessment of the fundamental components of the benthic cover. A quantitative assessment was conducted on five main benthic categories at WGNP; hard corals, soft corals, dead corals, sand, and rocks. Six invertebrate groups; banded coral shrimp, sea urchin, sea cucumber, the crown of thorn, giant clam, and Drupella sp. were also investigated. The study showed that, while there was no significant difference between sites in the benthic structure and cover, sites were different in the cover of hard coral, the abundance of benthic invertebrates, and the abundance of reef fishes. We also, assessed the status of eight impact indicators of reef damage (or damage indication categories); old dead, recently dead, total bleached, partial bleached, diseased, broken, fragments, and recruitments of corals at the marine protected area as well as investigated the coral reef/reef fish community relationship. Among the eight reef impact indicators that were assessed in the current study, the old dead corals showed the highest cover of the substrate. In the same context, the cover of the diseased colonies was lower than other categories in the area of the study. The study also indicated that increasing hard coral cover in the study area had strongly affected the abundance of reef fishes. Nevertheless, the abundance of reef fishes was found to be increased with the increase of the hard coral cover (P < 0.05, r = 0.8), and this trend was attained by all reef fish families, the highest sites in coral cover and fish abundance were: Hnakourab, Wadi Lahmy and Sharm El-Luli (32, 28 and 25%, and 9, 11 and 6 mean number of fish/20 m transect), respectively. Positive correlation between the hard coral cover and fish abundance was detected as well. Acanthuraidae displayed the highest mean number of individuals (53.25/20 m belt transect). The study concluded that there is a need to perform a periodic assessment of the benthic cover of the main components of coral reef communities. Also, the study emphasized the role of benthic substrate structure and cover in the reef fish ecology.
Current study evaluates the effect of formulated feed on growth performance and feed utilization ... more Current study evaluates the effect of formulated feed on growth performance and feed utilization of shingi fish (Heteropneustes fossilis) (Bloch) in glass aquarium culture system. Two formulated feeds; A & B with two different protein levels 35% & 28% were used as treatment feed. Change in growth performance by the shingi fish fed on two types of fish feed during the rearing and feeding trial have been assessed by the determination of condition factor, survival rate, average daily gain (ADG), and specific growth rate (SGR%). The value of condition factor, ADG and SGR% have been found to have similarities with the results obtained by other working scientists both at home and abroad. The fish feed A (35% protein) have been found to be effective for better growth of the shingi fish.
The Biological Bulletin, 2001
A series of cross-fertilization experiments were conducted with two unnamed, sympatric species of... more A series of cross-fertilization experiments were conducted with two unnamed, sympatric species of sea urchins in the Echinometra mathaei species complex. Echinometra sp. A (Ea) and Echinometra sp. C (Ec). Heterogametic fertilization success was high when eggs of EC and sperm of Ea were involved, and low with eggs of Ea and sperm of EC. Hybrids produced from crosses in either direction developed normally to sexually mature adults; Ea X Ea were largest in test size, followed by EC (ova) X Ea (sperm). Ea (ova) X EC (sperm), and EC X EC, respectively. Color patterns of the hybrids were closer to the maternal coloration, whereas other characters such as relative test dimensions and spine lengths, morphology of tubefoot and gonad spicules, and gamete sizes were intermediate. Fertilization rates in F, backcrosses were high, minimizing the possibility that hybrid infertility is a postzygotic mechanism of reproductive isolation. On the other hand, intensive surveys failed to find individuals with hybrid characteristics in the field, suggesting that natural hybridization between the two species is rare. Prezygotic isolating mechanisms, such as microhabitat separation and gamete incompatibility, at least between Ea eggs and EC sperm, most likely maintain the genetic integrity of these two closely related species.
Aquaculture Research, 2011
Background: Catheter ablation (CA) is an important treatment option for patients with atrial fibr... more Background: Catheter ablation (CA) is an important treatment option for patients with atrial fibrillation (AF), but a risk of bleeding complications is one of its drawbacks. Therefore, risk stratification of bleeding would be clinically valuable. Purpose: To assess whether bleeding risk scores for AF patients on oral anticoagulants, such as modified HAS-BLED (m-HAS-BLED), ATRIA bleeding, and ORBIT score, are useful to estimate the bleeding risk of CA for AF. Methods: We investigated 1322 patients consecutively enrolled in JACRE registry, which is a prospective, multicenter registry of AF patients receiving CA. Rivaroxaban (n=1118) or warfarin (n=204) was administered during the CA perioperative period, and the incidence of complications up to 30 days after CA was recorded. m-HAS-BLED score excluding labile international normalize ratio elements from HAS-BLED score, ATRIA bleeding score, and ORBIT score were used to estimate the risk. Results: Periprocedural bleeding complications were observed in 42 patients (3.2%), and the m-HAS-BLED, ATRIA bleeding, and ORBIT score were significantly associated with them [hazard ratio (95% confidence interval), 1.46 (1.06-2.01), 1.16 (1.00-1.35), and 1.29 (1.06-1.57), respectively]. Their incidence was similar between patients with moderate risk defined as m-HAS-BLED score of 2, ATRIA bleeding score of 2 to 5, and ORBIT score of 2 to 3 and those with each score of 0 or 1, respectively. Whereas, the risk of bleeding was significantly higher in those with m-HAS-BLED score of ≥3 [4.70 (2.06-10.73), ATRIA bleeding score of ≥6 [3.76 (1.47-8.19)], and ORBIT score of ≥4 [3.68 (1.60-8.44)] than in those with each score of 0-1, respectively. Figure 1s Conclusions: m-HAS-BLED score, ATRIA bleeding score, and ORBIT score could be beneficial to assess the periprocedural bleeding risk of CA for AF, and patients with each score of ≥3, ≥6, and ≥4 were stratified to be at high risk. Acknowledgement/Funding: This study is supported by Bayer Yakuhin.
Zoological Studies, 2004
M. Aminur Rahman* and Tsuyoshi Uehara* Department of Chemistry, Biology and Marine Science, Facul... more M. Aminur Rahman* and Tsuyoshi Uehara* Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, Japan ... M. Aminur Rahman and Tsuyoshi Uehara (2004) Interspecific ...
Global commons are the most threatened objects in climate change scenario. The nature of these co... more Global commons are the most threatened objects in climate change scenario. The nature of these commons itself is vulnerable in the world of unclear property rights, externalities and different forms of claims. Sunderban, the world's largest mangrove forest is in peril due to corrupt practice and its consequences are alarming especially in the realm of climate change. The aim of this paper is to pose the concern that Sunderban as a global commons and its deterioration due to malpractice in using resource is a global loss. In ...
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Papers by Dr. Md. Aminur Rahman, Dept. of FMB ,JUST