Malaria is a major public health concern in tropical and subtropical areas including Bangladesh. The country has a long history of incurring high malaria morbidity and mortality in a heterogeneous transmission dynamics- demographical, spatial, and temporal. Elimination of malaria in Bangladesh remains a prerequisite for promoting better public health, especially in the malaria hotspots in its remote south-east and north-east border areas. The country boasts with the world's largest delta and lengthy monsoons sharing her border with India and Myanmar- additional two endemic countries for malaria in the SEA.With a significant progress in combating malaria in recent past, Bangladesh now envisages to eliminate the disease by 2030. A significant decline in malaria cases and deaths in its plain areas, however is intrigued with in-country as well as cross-border human movement to and from the forests in and around Chattogram Hill Tracts that reportedly works as a source of infections of the disease. This forest malaria remains a significant obstacle to the country’s malaria elimination efforts. Bangladesh J. Zool. 52(1): 03-25, 2024
疟疾是包括孟加拉国在内的热带和亚热带地区的主要公共卫生问题。长期以来，孟加拉国的疟疾发病率和死亡率一直居高不下，其传播态势在人口、空间和时间上都不尽相同。在孟加拉国消除疟疾仍然是改善公共卫生的先决条件，尤其是在其偏远的东南部和东北部边境地区的疟疾热点地区。孟加拉国拥有世界上最大的三角洲和漫长的季风，与印度和缅甸接壤，这两个国家是东南亚地区疟疾流行的另外两个国家。孟加拉国平原地区的疟疾病例和死亡人数大幅下降，但该国境内以及往返于 Chattogram Hill Tracts 及其周边地区森林的跨境人口流动却令人担忧，据报道，这些地区是疟疾的传染源。这种森林疟疾仍然是该国消除疟疾工作的重大障碍。52(1):03-25, 2024
{"title":"Combating Forest Malaria: a major challenge in eliminating Malaria in Bangladesh","authors":"Md. Ariful Anwar Khan, H. Khanum, Sharmin Musa","doi":"10.3329/bjz.v52i1.74745","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74745","url":null,"abstract":"Malaria is a major public health concern in tropical and subtropical areas including Bangladesh. The country has a long history of incurring high malaria morbidity and mortality in a heterogeneous transmission dynamics- demographical, spatial, and temporal. Elimination of malaria in Bangladesh remains a prerequisite for promoting better public health, especially in the malaria hotspots in its remote south-east and north-east border areas. The country boasts with the world's largest delta and lengthy monsoons sharing her border with India and Myanmar- additional two endemic countries for malaria in the SEA.With a significant progress in combating malaria in recent past, Bangladesh now envisages to eliminate the disease by 2030. A significant decline in malaria cases and deaths in its plain areas, however is intrigued with in-country as well as cross-border human movement to and from the forests in and around Chattogram Hill Tracts that reportedly works as a source of infections of the disease. This forest malaria remains a significant obstacle to the country’s malaria elimination efforts.\u0000Bangladesh J. Zool. 52(1): 03-25, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sumi Akter, H. Khan, Hafisha Khatun Anee, Shefali Begum
Present study evaluated the toxicity of the leaf extracts of the plant Aegle marmelos(L.) Corrêa against the 4th instar larvae of the mosquito Culex quinquefasciatus Say (Diptera: Culicidae). The experiment was conducted in the ambient environment of the laboratory at the temperature (29 ± 2)ºC and (75-85)% relative humidity. Three solvents were used (viz. ethanol, chloroform and distilled water). A total of 25 actively swimming 4th instar larvae of the mosquito were exposed to various dose concentrations of the plant leaf extracts for 24 hours. Larval mortality was observed after 24 hours of exposure. For ethanol based leaf extracts, the larval mortality of mosquito at five different concentrations, viz. 2.0, 3.0, 4.0, 5.0 and 6.0 mg/ml were 5.33%, 44%, 56%, 73.33% and 97.33%, respectively. Chloroform based leaf extracts were tested with five different concentrations viz. 0.5, 1.0, 1.5, 2.0 and 2.5 mg/ml at which the extracts showed 9.33%, 25.33%, 56%, 94.66% and 100% larval mortality, respectively. For the water based extracts, the dose concentrations were viz. 2.0, 4.0, 6.0, 8.0 and 10.0 mg/ml at which the extracts exerted 30.66%, 54.66%, 60%, 68% and 90.66% larval mortality, respectively. With each dose 2 ml of dimethyl sulfoxide (DMSO) was added to make the extracts soluble in water. The LC50 and LC90 values for ethanol based leaf extracts were 3.530 mg/ml, 5.836 mg/ml and 8.793 mg/ml, respectively. For chloroform based leaf extracts, values were 1.184 mg/ml, 2.127 mg/ml and 3.430 mg/ml, respectively. For distilled water based leaf extracts, values were 3.730 mg/ml, 15.502 mg/ml and 49.521 mg/ml, respectively. The relative potency of three types of leaf extracts of Aegle marmelosagainst the larvae of Culex quinquefasciatus on the basis of , and values are as follows in decreasing order: chloroform based extract ( = 1.184 mg/ml, = 2.127 mg/ml and = 3.430 mg/ml) ˃ ethanol based extract ( = 3.530 mg/ml, = 5.836 mg/ml and = 8.793 mg/ml) ˃ water based extract ( = 3.730 mg/ml, = 15.502 mg/ml and = 49.521 mg/ml). It was found that chloroform extracts showed greater mortality of larvae of Cx. quinquefasciatus than the ethanol extracts and that of the water extracts. From the results it can be concluded that the different solvent based crude extracts of the leaf of A. marmeloswas an excellent potential for controlling Cx. quinquefasciatus mosquito larvae. Bangladesh J. Zool. 52(1): 119-132, 2024
{"title":"Efficacy of Aegle marmelos (L.) Corrêa leaf extracts against 4th instar larvae of the mosquito Culex quinquefasciatus Say (Diptera: Culicidae)","authors":"Sumi Akter, H. Khan, Hafisha Khatun Anee, Shefali Begum","doi":"10.3329/bjz.v52i1.74733","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74733","url":null,"abstract":"Present study evaluated the toxicity of the leaf extracts of the plant Aegle marmelos(L.) Corrêa against the 4th instar larvae of the mosquito Culex quinquefasciatus Say (Diptera: Culicidae). The experiment was conducted in the ambient environment of the laboratory at the temperature (29 ± 2)ºC and (75-85)% relative humidity. Three solvents were used (viz. ethanol, chloroform and distilled water). A total of 25 actively swimming 4th instar larvae of the mosquito were exposed to various dose concentrations of the plant leaf extracts for 24 hours. Larval mortality was observed after 24 hours of exposure. For ethanol based leaf extracts, the larval mortality of mosquito at five different concentrations, viz. 2.0, 3.0, 4.0, 5.0 and 6.0 mg/ml were 5.33%, 44%, 56%, 73.33% and 97.33%, respectively. Chloroform based leaf extracts were tested with five different concentrations viz. 0.5, 1.0, 1.5, 2.0 and 2.5 mg/ml at which the extracts showed 9.33%, 25.33%, 56%, 94.66% and 100% larval mortality, respectively. For the water based extracts, the dose concentrations were viz. 2.0, 4.0, 6.0, 8.0 and 10.0 mg/ml at which the extracts exerted 30.66%, 54.66%, 60%, 68% and 90.66% larval mortality, respectively. With each dose 2 ml of dimethyl sulfoxide (DMSO) was added to make the extracts soluble in water. The LC50 and LC90 values for ethanol based leaf extracts were 3.530 mg/ml, 5.836 mg/ml and 8.793 mg/ml, respectively. For chloroform based leaf extracts, values were 1.184 mg/ml, 2.127 mg/ml and 3.430 mg/ml, respectively. For distilled water based leaf extracts, values were 3.730 mg/ml, 15.502 mg/ml and 49.521 mg/ml, respectively. The relative potency of three types of leaf extracts of Aegle marmelosagainst the larvae of Culex quinquefasciatus on the basis of , and values are as follows in decreasing order: chloroform based extract ( = 1.184 mg/ml, = 2.127 mg/ml and = 3.430 mg/ml) ˃ ethanol based extract ( = 3.530 mg/ml, = 5.836 mg/ml and = 8.793 mg/ml) ˃ water based extract ( = 3.730 mg/ml, = 15.502 mg/ml and = 49.521 mg/ml). It was found that chloroform extracts showed greater mortality of larvae of Cx. quinquefasciatus than the ethanol extracts and that of the water extracts. From the results it can be concluded that the different solvent based crude extracts of the leaf of A. marmeloswas an excellent potential for controlling Cx. quinquefasciatus mosquito larvae.\u0000Bangladesh J. Zool. 52(1): 119-132, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract not available Bangladesh J. Zool. 52(1):01-02, 2024
摘要不可用孟加拉国 J. Zool.52(1):01-02, 2024
{"title":"Zoologists’ role as gamechangers in prevention of mosquitoes and mosquito-borne diseases of Bangladesh","authors":"Md. Niamul Naser","doi":"10.3329/bjz.v52i1.74712","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74712","url":null,"abstract":"Abstract not available\u0000Bangladesh J. Zool. 52(1):01-02, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md Rabiul Islam, Md Aminul Islam Bhuiyan, Aleya Begum, Zannatun Nahar Jhinu
The current investigation into endoparasitic helminths in wild birds from various regions of Bangladesh sheds light on a previously unexplored aspect of avian parasitology in the country. The study used specimens provided by the Padma Bridge Museum Project, a sub-project of the Bangladesh government-owned Padma Multi-purpose Bridge Project (PMBP), where dead birds were utilized for museum specimens and taxidermy. A total of 22 specimens from 21 species of wild birds were examined in this study. The samples were primarily derived from the alimentary canal (gut) and liver of the hosts. It is important to note that the study faced limitations in calculating parameters such as prevalence and intensity since all hosts were single-sampled, except in the case of the Little Cormorant, where two samples were collected, both of which were found to be infected. The study identified six cases of helminth parasite infestation in the examined bird specimens. These findings provided valuable insights into the diversity of parasites affecting these avian hosts. The specific parasite species observed, along with the host species, are as follows- Peregrine Falcon (Falco peregrinus Tunstall 1771) was infected with Serratospiculum tendo (Nitzsch 1819) in the air sacs. Grey Heron (Ardea cinerea Linnaeus 1758) showed infestation with Porrocaecumardeae (Frölich 1802) in the intestine. Little Cormorant (Microcarboniger Vieillot 1817) had two parasites found: Contracaecumrudolphii (Rudolphi 1809) in the crop and Ascaridia sp. (Dujardin 1945) in the intestine. Little Egret (Egrettagarzetta Linnaeus 1766) had Heterakis sp. (Schrank 1790) identified in the intestine. Bank Myna (Acridotheres ginginianus Latham 1790) was found to host Capillariaannulata (Milon 1800) in the crop. One notable aspect of this study is that all the parasite-host associations observed were reported as the first records in their respective hosts within Bangladesh. This finding highlights the importance of this research in enhancing our understanding of avian parasitology in the region and the potential impact of these parasites on wild bird populations. Bangladesh J. Zool. 52(1): 39-55, 2024
{"title":"Avian nematode parasites of some wild birds of Bangladesh","authors":"Md Rabiul Islam, Md Aminul Islam Bhuiyan, Aleya Begum, Zannatun Nahar Jhinu","doi":"10.3329/bjz.v52i1.74725","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74725","url":null,"abstract":"The current investigation into endoparasitic helminths in wild birds from various regions of Bangladesh sheds light on a previously unexplored aspect of avian parasitology in the country. The study used specimens provided by the Padma Bridge Museum Project, a sub-project of the Bangladesh government-owned Padma Multi-purpose Bridge Project (PMBP), where dead birds were utilized for museum specimens and taxidermy. A total of 22 specimens from 21 species of wild birds were examined in this study. The samples were primarily derived from the alimentary canal (gut) and liver of the hosts. It is important to note that the study faced limitations in calculating parameters such as prevalence and intensity since all hosts were single-sampled, except in the case of the Little Cormorant, where two samples were collected, both of which were found to be infected. The study identified six cases of helminth parasite infestation in the examined bird specimens. These findings provided valuable insights into the diversity of parasites affecting these avian hosts. The specific parasite species observed, along with the host species, are as follows- Peregrine Falcon (Falco peregrinus Tunstall 1771) was infected with Serratospiculum tendo (Nitzsch 1819) in the air sacs. Grey Heron (Ardea cinerea Linnaeus 1758) showed infestation with Porrocaecumardeae (Frölich 1802) in the intestine. Little Cormorant (Microcarboniger Vieillot 1817) had two parasites found: Contracaecumrudolphii (Rudolphi 1809) in the crop and Ascaridia sp. (Dujardin 1945) in the intestine. Little Egret (Egrettagarzetta Linnaeus 1766) had Heterakis sp. (Schrank 1790) identified in the intestine. Bank Myna (Acridotheres ginginianus Latham 1790) was found to host Capillariaannulata (Milon 1800) in the crop. One notable aspect of this study is that all the parasite-host associations observed were reported as the first records in their respective hosts within Bangladesh. This finding highlights the importance of this research in enhancing our understanding of avian parasitology in the region and the potential impact of these parasites on wild bird populations.\u0000 Bangladesh J. Zool. 52(1): 39-55, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khandaker Noor E Jannat, S. K. Datta, Md Sagir Ahmed, Murshida Begum
The current study in Gulshan thana area of Dhaka North City Corporation documented new records of the members of Culex pipiens group. Until now, Culex quinquefasciatus was recorded as the sole known species of pipiens group in Bangladesh. Through morphological, wing morphometry and genetic analysis, some members of the Culex pipiens complex were identified, such as, Culex pipiens, Culex pipiens pallens, and Culex pipiens f pipiens. These species were observed co-existing with Cx. quinquefasciatus. Molecular identification was conducted by employing cytochrome c oxidase subunit 1 (COI) and 16S rRNA gene barcoding including sequence percentage identity using BLAST and performing tree-based identification through Neighbor-Joining (NJ) model using the MEGA 11 software package. The 16S sequences of Cx. pipiens pallens and Cx. pipiens f pipiens were submitted for the first time into the GenBank. This study also represents the first record of Cx. pipiens pallens in the Indian region, a species previously documented primarily in Japan, China and South Korea as a prevalent house mosquito. Moreover, the fact that all the newly recorded species are well known vectors of filariasis poses a substantial challenge to Bangladesh, which has recently been declared as a filaria-free country by World Health Organization. Bangladesh J. Zool. 52(1): 95-110, 2024
{"title":"Culex pipiens complex with three new Records in Bangladesh: A new challenge to the elimination of Lymphatic filariasis","authors":"Khandaker Noor E Jannat, S. K. Datta, Md Sagir Ahmed, Murshida Begum","doi":"10.3329/bjz.v52i1.74732","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74732","url":null,"abstract":"The current study in Gulshan thana area of Dhaka North City Corporation documented new records of the members of Culex pipiens group. Until now, Culex quinquefasciatus was recorded as the sole known species of pipiens group in Bangladesh. Through morphological, wing morphometry and genetic analysis, some members of the Culex pipiens complex were identified, such as, Culex pipiens, Culex pipiens pallens, and Culex pipiens f pipiens. These species were observed co-existing with Cx. quinquefasciatus. Molecular identification was conducted by employing cytochrome c oxidase subunit 1 (COI) and 16S rRNA gene barcoding including sequence percentage identity using BLAST and performing tree-based identification through Neighbor-Joining (NJ) model using the MEGA 11 software package. The 16S sequences of Cx. pipiens pallens and Cx. pipiens f pipiens were submitted for the first time into the GenBank. This study also represents the first record of Cx. pipiens pallens in the Indian region, a species previously documented primarily in Japan, China and South Korea as a prevalent house mosquito. Moreover, the fact that all the newly recorded species are well known vectors of filariasis poses a substantial challenge to Bangladesh, which has recently been declared as a filaria-free country by World Health Organization.\u0000Bangladesh J. Zool. 52(1): 95-110, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The flower shape, size and color preferences of four bee species belonging to the family Apidae was observed. The observed species were Apis cerana Fabricius, Apis dorsata Fabricius, Apis florea Fabricius, and Xylocopa aestuans Linnaeus. The bees were observed and collected from two areas of Dhaka city- Curzon Hall and Ramna Park from February 2022 to December 2022. During the study period it was observed that the abundance of A. florea was the highest (about 35.18% of the total population) and X. aestuans was the least (about 10.26% of the total population). Preference over a particular size was an important attribute among pollinators. Flowers with mean diameter greater than 50 mm (Dahlia sp., Couroupita guianensis, Tagetes sp. Calendula officinalis, Mesua ferrea) were more visited by the pollinators. Flowers of different shapes were examined in the study and pollinators showed different preferences for different shaped flower. A. cerana mostly preferred rounded and rotate shaped flowers (Dahlia sp. 45% and C. sulphureus 41.16%). A.florea had a preference towards the star shaped flower (L.indica, 69.39%) followed by globe shaped flower (Tagetes sp., 50.70%). A. dorsata had a choice over trumpet shaped flower (Tecoma stans, 35.5%), followed by rounded shaped flower (Dahlia sp. 22%). X. aestuans had preferred orchid shaped flower the most (Bauhinia sp., 30.45%) followed by cruciate shaped flower (M. ferrea, 22.91%). Preference for any particular color was also examined in the study. Among them, A. cerana preferred the red color most (about 45% relative abundance in Dahlia sp.) followed by the color orange (about 41.16% relative abundance in C. sulphureus). A. dorsata preferred the yellow color the most (35.5% relative abundance in T. stans) followed by the color red (22% in Dahlia sp.). A. florea had a preference for color pink (69.39% in L. indica and 46.45% in C. guianensis) followed by the color orange (Tagetes sp., 51.61%). X. aestuans preferred the purple color most in the study (30.45% in Bauhinia sp.). The correlation between proboscis length of pollinators and different floral parameters of flowers were also investigated. The results showed that those parameters were not significantly correlated. Bangladesh J. Zool. 52(1): 27-37, 2024
{"title":"Flower shape, size and color preferences of four pollinators (Insecta: Apidae) in selected areas of Dhaka city","authors":"T. Akter, Jannatul Ferdous, S. Begum","doi":"10.3329/bjz.v52i1.74721","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74721","url":null,"abstract":"The flower shape, size and color preferences of four bee species belonging to the family Apidae was observed. The observed species were Apis cerana Fabricius, Apis dorsata Fabricius, Apis florea Fabricius, and Xylocopa aestuans Linnaeus. The bees were observed and collected from two areas of Dhaka city- Curzon Hall and Ramna Park from February 2022 to December 2022. During the study period it was observed that the abundance of A. florea was the highest (about 35.18% of the total population) and X. aestuans was the least (about 10.26% of the total population). Preference over a particular size was an important attribute among pollinators. Flowers with mean diameter greater than 50 mm (Dahlia sp., Couroupita guianensis, Tagetes sp. Calendula officinalis, Mesua ferrea) were more visited by the pollinators. Flowers of different shapes were examined in the study and pollinators showed different preferences for different shaped flower. A. cerana mostly preferred rounded and rotate shaped flowers (Dahlia sp. 45% and C. sulphureus 41.16%). A.florea had a preference towards the star shaped flower (L.indica, 69.39%) followed by globe shaped flower (Tagetes sp., 50.70%). A. dorsata had a choice over trumpet shaped flower (Tecoma stans, 35.5%), followed by rounded shaped flower (Dahlia sp. 22%). X. aestuans had preferred orchid shaped flower the most (Bauhinia sp., 30.45%) followed by cruciate shaped flower (M. ferrea, 22.91%). Preference for any particular color was also examined in the study. Among them, A. cerana preferred the red color most (about 45% relative abundance in Dahlia sp.) followed by the color orange (about 41.16% relative abundance in C. sulphureus). A. dorsata preferred the yellow color the most (35.5% relative abundance in T. stans) followed by the color red (22% in Dahlia sp.). A. florea had a preference for color pink (69.39% in L. indica and 46.45% in C. guianensis) followed by the color orange (Tagetes sp., 51.61%). X. aestuans preferred the purple color most in the study (30.45% in Bauhinia sp.). The correlation between proboscis length of pollinators and different floral parameters of flowers were also investigated. The results showed that those parameters were not significantly correlated.\u0000Bangladesh J. Zool. 52(1): 27-37, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sukanya Hasan, M. Hasan, Saidul Amin, M. Hasan, Khadija Begum Rimu, Nusrat Jahan Ria, Murshida Begum
The study investigated the effect of various arsenic concentrations on the brain tissue of L. cuprina employing histological slide preparations via feeding and injection treatments. Arsenic-induced mortality was observed across concentrations of 0.01 ppm, 0.05 ppm, 0.1 ppm, 0.5 ppm, and 1 ppm over a 72-hour period. Total mortality within this timeframe was corrected by using Abbott's correction formula.The mean mortality resulting from exposure to various concentrations of As in both cases was analyzed using Levene's test followed by one-way ANOVA by SPSS (v. 26) and the posthoc analysis was conducted by Duncan's Multiple Range Test. The highest mortality recorded at 1 ppm for both feeding (9.33±0.88) and injection (10.67±0.33) treatments. Conversely, the lowest mortality occurred at 0.01 ppm for both fed (1.67±0.33) and injected L. cuprina (2.33±0.33), indicating a positive correlation between mortality and arsenic concentration. Comparison of feeding and injection methods revealed consistently higher mortality with injection. Histological slide preparations revealed varying degrees of brain tissue degradation, categorized into four groups (A=0-30%, B=31-60%, C=61-80%, and D=81-100%). The highest mean of maximum affected brains (Category D) was observed at 1 ppm for both feeding (14.67±1.53) and injection (16.33±1.53), while the minimum affected brains (Category A) occurred at 0.01 ppm for feeding (17.67±0.58) and injection (17.00±1.00). The results highlight the importance of conducting thorough toxicological investigations that cover a range of metal contaminants, including arsenic, and involve diverse insect species. Bangladesh J. Zool. 52(1): 57-66, 2024
{"title":"Histological assays on impact of Arsenic on the brain and Arsenic-induced mortality in Lucilia cuprina (Wiedemann, 1830) (Diptera: Calliphoridae)","authors":"Sukanya Hasan, M. Hasan, Saidul Amin, M. Hasan, Khadija Begum Rimu, Nusrat Jahan Ria, Murshida Begum","doi":"10.3329/bjz.v52i1.74730","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74730","url":null,"abstract":"The study investigated the effect of various arsenic concentrations on the brain tissue of L. cuprina employing histological slide preparations via feeding and injection treatments. Arsenic-induced mortality was observed across concentrations of 0.01 ppm, 0.05 ppm, 0.1 ppm, 0.5 ppm, and 1 ppm over a 72-hour period. Total mortality within this timeframe was corrected by using Abbott's correction formula.The mean mortality resulting from exposure to various concentrations of As in both cases was analyzed using Levene's test followed by one-way ANOVA by SPSS (v. 26) and the posthoc analysis was conducted by Duncan's Multiple Range Test. The highest mortality recorded at 1 ppm for both feeding (9.33±0.88) and injection (10.67±0.33) treatments. Conversely, the lowest mortality occurred at 0.01 ppm for both fed (1.67±0.33) and injected L. cuprina (2.33±0.33), indicating a positive correlation between mortality and arsenic concentration. Comparison of feeding and injection methods revealed consistently higher mortality with injection. Histological slide preparations revealed varying degrees of brain tissue degradation, categorized into four groups (A=0-30%, B=31-60%, C=61-80%, and D=81-100%). The highest mean of maximum affected brains (Category D) was observed at 1 ppm for both feeding (14.67±1.53) and injection (16.33±1.53), while the minimum affected brains (Category A) occurred at 0.01 ppm for feeding (17.67±0.58) and injection (17.00±1.00). The results highlight the importance of conducting thorough toxicological investigations that cover a range of metal contaminants, including arsenic, and involve diverse insect species. \u0000Bangladesh J. Zool. 52(1): 57-66, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md Imran Hossain, Farjana Alam Disha, Md Ruhul Amin, E. Kayesh, Shamim Hossain
Hitherto the authors reported, a total of 3 genera viz: Amrasca Ghauri, 1967; Distantasca Dworakowska 1972; Empoasca Walsh, 1862 under the tribe Empoascini Distant, 1908 (Cicadellidae: Typhlocybinae) have been known to be reported in Bangladesh. In the course of the taxonomic survey on the empoascine leafhoppers from Bangladesh, we recorded another genus for the first time Apheliona Kirkaldy, 1907. The constituent species Apheliona ferruginea (Matsumura, 1931), is included in the faunal checklist of Bangladesh. Diagnostic descriptions, illustrations discriminating species and a revised checklist as well as the key to the genera under the tribe Empoascini from Bangladesh are also provided here. Bangladesh J. Zool. 52(1): 111-118, 2024
{"title":"First record of leafhopper Genus Apheliona Kirkaldy, 1907 (Hemiptera: Cicadellidae: Typhlocybinae) from Bangladesh","authors":"Md Imran Hossain, Farjana Alam Disha, Md Ruhul Amin, E. Kayesh, Shamim Hossain","doi":"10.3329/bjz.v52i1.74735","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74735","url":null,"abstract":"Hitherto the authors reported, a total of 3 genera viz: Amrasca Ghauri, 1967; Distantasca Dworakowska 1972; Empoasca Walsh, 1862 under the tribe Empoascini Distant, 1908 (Cicadellidae: Typhlocybinae) have been known to be reported in Bangladesh. In the course of the taxonomic survey on the empoascine leafhoppers from Bangladesh, we recorded another genus for the first time Apheliona Kirkaldy, 1907. The constituent species Apheliona ferruginea (Matsumura, 1931), is included in the faunal checklist of Bangladesh. Diagnostic descriptions, illustrations discriminating species and a revised checklist as well as the key to the genera under the tribe Empoascini from Bangladesh are also provided here.\u0000Bangladesh J. Zool. 52(1): 111-118, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A total of 240 Grey Mullet (Rhinomugil corsula), collected from the Sitakunda coast of the Bay of Bengal, were used for the analysis of food and feeding habit during the period from January 2017 to December 2017. Thirteen major types of food items, viz., blue-green algae, green algae, diatoms, desmids, dinoflagellates, rotifer, copepod, cladoceran, other crustacean, benthic organisms, semi-decomposed plant parts, decayed organic matters and sand and detritus were found in the gut of the fish. The rank of food preference – according to index of preponderance (IP) – was Diatoms (71.88%) > Green algae (10.01%) > Copepods (9.94%) Blue-green algae (4.42%) > Sand and detritus (2.32%) > Decayed organic matter (2.17%) > Rotifers (1.13%) > Semi-digested plant parts (1.02%) > Desmids (0.71%) >Cladocerans (0.45%) > Crustacea (0.26%) > Benthic organism (0.18%) > Dinoflagellates (0.11%). The highly fed fishes (gorged stomach) were found in May (100%), October (85%), June (65%), August (65%), September (50%), November (50%) and March (43%); whereas the highest empty guts were found in January (45%). Length wise feeding intensity revealed that smaller fishes (9-15 cm) were more active feeder than those of the larger fishes of 15 cm above. It can be inferred that Rhinomugil corsula primarily functions as an iliophagus bottom feeder, mainly consuming planktonic organisms, particularly diatoms. Bangladesh J. Zool. 52(1): 81-94, 2024
{"title":"Food and feeding habits of Grey mullet, Rhinomugil corsula (Hamilton, 1822) in the Sitakunda coast of Bay of Bengal, Chattogram, Bangladesh","authors":"Syeda Ismat Ara, M. Azadi, M. Nasiruddin","doi":"10.3329/bjz.v52i1.74731","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74731","url":null,"abstract":"A total of 240 Grey Mullet (Rhinomugil corsula), collected from the Sitakunda coast of the Bay of Bengal, were used for the analysis of food and feeding habit during the period from January 2017 to December 2017. Thirteen major types of food items, viz., blue-green algae, green algae, diatoms, desmids, dinoflagellates, rotifer, copepod, cladoceran, other crustacean, benthic organisms, semi-decomposed plant parts, decayed organic matters and sand and detritus were found in the gut of the fish. The rank of food preference – according to index of preponderance (IP) – was Diatoms (71.88%) > Green algae (10.01%) > Copepods (9.94%) Blue-green algae (4.42%) > Sand and detritus (2.32%) > Decayed organic matter (2.17%) > Rotifers (1.13%) > Semi-digested plant parts (1.02%) > Desmids (0.71%) >Cladocerans (0.45%) > Crustacea (0.26%) > Benthic organism (0.18%) > Dinoflagellates (0.11%). The highly fed fishes (gorged stomach) were found in May (100%), October (85%), June (65%), August (65%), September (50%), November (50%) and March (43%); whereas the highest empty guts were found in January (45%). Length wise feeding intensity revealed that smaller fishes (9-15 cm) were more active feeder than those of the larger fishes of 15 cm above. It can be inferred that Rhinomugil corsula primarily functions as an iliophagus bottom feeder, mainly consuming planktonic organisms, particularly diatoms.\u0000Bangladesh J. Zool. 52(1): 81-94, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Atikul Islam Mithu, Mirza Md Moon Ridoy, Sajid Hassan Prangon
Abstract not available Bangladesh J. Zool. 52(1): 133-137, 2024
摘要不可用孟加拉国 J. Zool.52(1):133-137, 2024
{"title":"Predation on Asian Common Toad (Duttaphrynus melanostictus) by Bengal monitor lizard (Varanus) in National botanical garden, Bangladesh","authors":"Atikul Islam Mithu, Mirza Md Moon Ridoy, Sajid Hassan Prangon","doi":"10.3329/bjz.v52i1.74736","DOIUrl":"https://doi.org/10.3329/bjz.v52i1.74736","url":null,"abstract":"Abstract not available\u0000Bangladesh J. Zool. 52(1): 133-137, 2024 ","PeriodicalId":8702,"journal":{"name":"Bangladesh Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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