The present study was conducted to quantify the water quality parameters and plankton concentrations of the Meghna river estuary during the spawning season of Hilsa (Tenualosa ilisa) and also to establish knowledge about the habitat. Hilsa (Tenualosa ilisha) is one of the flagship anadromous fish species of Bangladesh that migrate downstream for spawning purposes only through the Ganges-Meghna river system route. The study period constitutes two spawning seasons of Hilsa (Tenualosa ilisha) (June 2014 and February, March 2015). The water quality parameters and plankton concentrations were measured and analyzed by standard methods. A total of 50 genera of plankton identified from the water body belonging to the group Bacillariophyceae, Cyanophyceae, Chlorophyceae, Dinophyceae, Coscinodiscophyceae, Copepoda, Rotifera, Cladoceran, Protozoa, Crustacean larvae and Meroplankton. The phytoplankton density was varied from 2.93×10 3 to 7.94×10 3 cells/L and zooplankton density of 1.15×10 3 cells/L to 1.8×10 3 cells/L. The plankton concentrations were strongly correlated with the fluctuations of water quality. The water temperature and phytoplankton density was positively correlated (r = 0.75), on the other hand, negative correlation was found between phyplankton and transparency (r = -0.84). Bacillariophyceae was the most dominant group contributing 78% of phytoplankton and among zooplankton, Copepoda contributes 36%. Shannon-Weiner species diversity index (Hʹ) used as an indicator of water quality. It ranged from 2.07 to 2.74 (phytoplankton) and 1.82 to 2.38 (zooplankton). The mean value of phytoplankton was 2.42 ± 0.19 and zooplankton was 2.14 ± 0.16 and it was within the range of 1 to 3, so the water body is moderately polluted. The phytoplankton cell density is a good indicator to determine the trophic status of a particular water body. The mean cell density of phytoplankton was 5372 cells/L and could be classified as oligotrophic. Oligotrophic water body characters lack nutrients which resulted in the lowest density of plankton. Based on plankton density it can be concluded that during spawning season, plankton profile is low which might be hindered Hilsa to migrate this spawning ground.
Background: Primary fallopian tube carcinoma (PFTC) is one of the rarest malignancies of female genital tract. It represents <1% of all gynecologic malignancies. Preoperative diagnosis is uncommon due to its rarity and non-specific symptoms. In most cases diagnosis is made during surgery or histological examination. Rarity of this type of carcinoma prompted us to report it as individual case. Case: A 40-yearold parous women presented with bilateral PFTC. The patient gave a history of lower abdominal and pelvic pain for 2 years on several occasions. An abdominal ultrasound finding showed an adnexal mass and her CA125 level was 30IU/ml (normal- <35IU/ml). Clinically she was suspected as a case of pelvic inflammatory disease (PID). She underwent Total Abdominal Hysterectomy with bilateral salpingoophorectomy. Intraoperative findings were consistent with PID. Final pathologic analysis showed bilateral primary fallopian tube carcinoma —well differentiated serous adenocarcinoma. Post operatively she was referred for oncological management. Conclusion: Malignancy should be considered in the differential diagnosis of PID especially in premenopausal age and intraoperative frozen section biopsy is crucial to make correct diagnosis and to allow appropriate surgical staging. J Bangladesh Coll Phys Surg 2020; 38(1): 49-52
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