Pub Date : 2013-06-22DOI: 10.3329/UJZRU.V31I0.15399
A. Reza, A. Hasan, Mosharrof Hossain, S. Parween
The result of bird watching at Rajshahi University (RU) campus during a period from March 2008 to July 2012 is presented in this article. A total of 159 species of birds under 102 genera, 36 families and 13 orders were observed. Highest number of species (76) and genera (41) are passerines, of which the highest number of species belongs to Corvidae family. Among the non-passerines (83 species) maximum number of species is under the family Ardeidae. Three species remained unidentified. Among the birds of RU campus 121 species are residents of Bangladesh; 38 species are migratory, of which 29 are winter visitors, 2 are summer visitors and 7 are passage migrants. Maximum of the bird species are habitants of the open woods. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15399 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 39-47
本文介绍了2008年3月至2012年7月期间在拉杰沙希大学(RU)校园观鸟的结果。共发现鸟类159种，隶属13目36科102属。雀形目种类最多(76种)，属最多(41属)，其中以鸦科种类最多。在非雀形目动物中，以鹭科种类最多(83种)。有三种仍未被确认。RU校园鸟类中孟加拉国居民121种;候鸟38种，其中冬候鸟29种，夏候鸟2种，过境鸟7种。大多数鸟类栖息在开阔的树林里。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15399 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 39-47
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Pub Date : 2013-06-21DOI: 10.3329/UJZRU.V31I0.15398
Md. Sakhawat Hossain, M. F. Jaman, Mushtaq Ahmed, Md Mokhlesur Rahman, Md Saidur Rahman
An extensive study was conducted from March 2007 to February 2012 on hatching success of saltwater crocodile ( Crocodylus porosus ) in the Reptiles Farm Ltd. (RFL) located at Hatiber village of Uthura union under Bhaluka upazila in Mymensingh. The study was mainly based on direct field observation and some previous data collected by farm’s technicians. A special type of incubator having 98-100% moisture and 31-33 0 C temperature was maintained to improve the hatching success. Yearly hatching success in captivity was 95.8%, 95.15%, 97.44%, 96.03% and 94.53% in 2007 through 2011, respectively. The average rate of hatching success in RFL was 95.8 ± 1.09%. Hundred percent hatching success was found in 29 out of 56 clutches. Clutch size varied from 19 to 68 eggs. Unhatched eggs were 4.19%, of which most of the embryos died before hatching. The average time required for incubation was 79 ± 3, 79.5 ± 4.5, 80 ± 4, 80.5 ± 4.5 and 78.5 ± 3.5 days in the above mentioned period. Compared to the wild habitat, captive environment in controlled weather and predation might improve hatching rates. This study suggests that conservation of this endangered species is possible by captive breeding and reintroduction program. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15398 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 35-38
2007年3月至2012年2月，在Mymensingh Bhaluka upazila地区Uthura union的Hatiber村爬行动物农场有限公司(RFL)对咸水鳄(Crocodylus porosus)的孵化成功率进行了广泛的研究。该研究主要基于现场直接观测和农场技术人员以前收集的一些数据。为提高孵化成功率，采用特殊的培养箱，保持98-100%的水分和31-33℃的温度。2007 - 2011年人工饲养的年孵化成功率分别为95.8%、95.15%、97.44%、96.03%和94.53%。RFL的平均孵化成功率为95.8±1.09%。56次卵中有29次孵化成功率为100%。窝卵数从19到68个不等。未孵化卵占4.19%，其中大部分胚胎在孵化前死亡。平均孵育时间分别为79±3、79.5±4.5、80±4、80.5±4.5和78.5±3.5 d。与野生栖息地相比，圈养环境在控制天气和捕食的条件下可能会提高孵化率。该研究表明，通过圈养繁殖和放归计划可以保护这一濒危物种。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15398 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 35-38
{"title":"High hatching success of saltwater crocodile (Crocodylus porosus) in a commercial Crocodile Farm of Bangladesh","authors":"Md. Sakhawat Hossain, M. F. Jaman, Mushtaq Ahmed, Md Mokhlesur Rahman, Md Saidur Rahman","doi":"10.3329/UJZRU.V31I0.15398","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15398","url":null,"abstract":"An extensive study was conducted from March 2007 to February 2012 on hatching success of saltwater crocodile ( Crocodylus porosus ) in the Reptiles Farm Ltd. (RFL) located at Hatiber village of Uthura union under Bhaluka upazila in Mymensingh. The study was mainly based on direct field observation and some previous data collected by farm’s technicians. A special type of incubator having 98-100% moisture and 31-33 0 C temperature was maintained to improve the hatching success. Yearly hatching success in captivity was 95.8%, 95.15%, 97.44%, 96.03% and 94.53% in 2007 through 2011, respectively. The average rate of hatching success in RFL was 95.8 ± 1.09%. Hundred percent hatching success was found in 29 out of 56 clutches. Clutch size varied from 19 to 68 eggs. Unhatched eggs were 4.19%, of which most of the embryos died before hatching. The average time required for incubation was 79 ± 3, 79.5 ± 4.5, 80 ± 4, 80.5 ± 4.5 and 78.5 ± 3.5 days in the above mentioned period. Compared to the wild habitat, captive environment in controlled weather and predation might improve hatching rates. This study suggests that conservation of this endangered species is possible by captive breeding and reintroduction program. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15398 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 35-38","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"65 1","pages":"35-38"},"PeriodicalIF":0.0,"publicationDate":"2013-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75638972","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}
Pub Date : 2013-06-21DOI: 10.3329/UJZRU.V31I0.15397
N. J. Sarker, M. Jaman, S. Mustafa, S. Rahman
Breeding biology of the Coppersmith barbet, Megalaima haemacephala (Muller, 1776) was carried out between February, 2006 and January, 2007 at Sharawardy Uddyan, Ramna Park, Curzon Hall and National Botanical Garden. The breeding season started from December and ended in June. In total 20 nests were observed, of which 10 nests were studied in details in four study areas. The coppersmith barbet mostly preferred to make holes on the branches of koroi ( Albizzia procera ) for nesting. Egg laying started on 15 th February in the study areas. Average height of nests from the ground was 9.7m and average depth and diameter of the holes was 29.20cm and 4.46cm respectively. New holes were constructed yearly or the old one was reused. Both the sexes took part in incubation of eggs, brooding and feeding to the nestlings. A total of 30 eggs were laid in 10 nests. Clutch size varied from 2 – 4 eggs (average: 3 eggs). Among them, 20 (66.67%) eggs were hatched and the rest 10 (33.33%) were unhatched and lost. Average incubation period was 14 days. The male and the female incubated the eggs for an average of 27.44 minutes/ hours and 32.56 minutes/ hours, respectively. Average number of nestlings (brood size) per nest was 2. Out of 20 nestlings, 16 left their nests successively. The breeding success was 53.33% in relation to the number of eggs laid and 80% in relation to nestlings hatched. The average weight of eggs and nestlings was 3.59g and 9.33g, respectively. The main causes of loss of the eggs and nestlings were human interference, predation and ectoparasitic infections. Insects and fruits were fed to the nestlings by their parents. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15397 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 31-34
本文于2006年2月至2007年1月在Sharawardy Uddyan、Ramna公园、Curzon Hall和国家植物园对铜smith barbet, Megalaima haemacephala (Muller, 1776)进行了育种生物学研究。繁殖季节从12月开始，到6月结束。共观察到20个巢，对其中10个巢在4个研究区进行了详细研究。铜匠barbet大多喜欢在koroi(合欢)的树枝上打洞筑巢。研究区于2月15日开始产卵。巢距地面平均高度9.7m，洞深29.20cm，洞径4.46cm。每年都要建造新的洞，或者旧的洞被重复使用。两性都参与了蛋的孵化，孵蛋和喂养雏鸟。10个巢共下了30个蛋。卵数从2 - 4个不等(平均3个)。其中孵蛋20只(66.67%)，失蛋10只(33.33%)。平均潜伏期为14天。雄性和雌性的产卵时间分别为27.44分钟/小时和32.56分钟/小时。每窝平均雏鸟数(窝仔数)为2只。在20只雏鸟中，有16只先后离开了巢。产卵率为53.33%，雏鸟孵化率为80%。蛋和雏鸟的平均体重分别为3.59g和9.33g。造成卵和雏鸟损失的主要原因是人为干扰、捕食和体外寄生虫感染。它们的父母用昆虫和水果喂雏鸟。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15397 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 31-34
{"title":"Breeding biology of coppersmith barbet, Megalaima haemacephala (Müller, 1776)","authors":"N. J. Sarker, M. Jaman, S. Mustafa, S. Rahman","doi":"10.3329/UJZRU.V31I0.15397","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15397","url":null,"abstract":"Breeding biology of the Coppersmith barbet, Megalaima haemacephala (Muller, 1776) was carried out between February, 2006 and January, 2007 at Sharawardy Uddyan, Ramna Park, Curzon Hall and National Botanical Garden. The breeding season started from December and ended in June. In total 20 nests were observed, of which 10 nests were studied in details in four study areas. The coppersmith barbet mostly preferred to make holes on the branches of koroi ( Albizzia procera ) for nesting. Egg laying started on 15 th February in the study areas. Average height of nests from the ground was 9.7m and average depth and diameter of the holes was 29.20cm and 4.46cm respectively. New holes were constructed yearly or the old one was reused. Both the sexes took part in incubation of eggs, brooding and feeding to the nestlings. A total of 30 eggs were laid in 10 nests. Clutch size varied from 2 – 4 eggs (average: 3 eggs). Among them, 20 (66.67%) eggs were hatched and the rest 10 (33.33%) were unhatched and lost. Average incubation period was 14 days. The male and the female incubated the eggs for an average of 27.44 minutes/ hours and 32.56 minutes/ hours, respectively. Average number of nestlings (brood size) per nest was 2. Out of 20 nestlings, 16 left their nests successively. The breeding success was 53.33% in relation to the number of eggs laid and 80% in relation to nestlings hatched. The average weight of eggs and nestlings was 3.59g and 9.33g, respectively. The main causes of loss of the eggs and nestlings were human interference, predation and ectoparasitic infections. Insects and fruits were fed to the nestlings by their parents. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15397 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 31-34","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"35 1","pages":"31-34"},"PeriodicalIF":0.0,"publicationDate":"2013-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79785062","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}
Pub Date : 2013-06-19DOI: 10.3329/UJZRU.V31I0.15378
S. Sultana
To study the big and Small Indigenous Species (SIS) of fish production, 15 ponds of Rajshahi University campus were selected. The pond production was ranged from 326.16 to 2187.40 kg/ha. The ratio of SIS and big fish production was calculated maximum as 1 : 0.10 (by number) and 1 : 7.46 (by weight). Majority of these SIS fish are Self Recruiting Species (SRS), because they were not stocked in the studied ponds. The F/C ratio was obtained as 4.583 in average DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15378 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 27-30
以Rajshahi大学校园内的15个池塘为研究对象，对鱼类生产的大小本地物种(SIS)进行了研究。池塘产量为326.16 ~ 2187.40 kg/ha。SIS与大鱼产量的比值最大为1:1 .10(按数量计算)和1:7 .46(按重量计算)。这些SIS鱼大多数是自雇种(SRS)，因为它们没有在研究的池塘中放养。F/C比值平均为4.583,DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15378 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 27-30
{"title":"Production of small and big fishes of selected ponds","authors":"S. Sultana","doi":"10.3329/UJZRU.V31I0.15378","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15378","url":null,"abstract":"To study the big and Small Indigenous Species (SIS) of fish production, 15 ponds of Rajshahi University campus were selected. The pond production was ranged from 326.16 to 2187.40 kg/ha. The ratio of SIS and big fish production was calculated maximum as 1 : 0.10 (by number) and 1 : 7.46 (by weight). Majority of these SIS fish are Self Recruiting Species (SRS), because they were not stocked in the studied ponds. The F/C ratio was obtained as 4.583 in average DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15378 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 27-30","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"21 1","pages":"27-30"},"PeriodicalIF":0.0,"publicationDate":"2013-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87846476","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}
Pub Date : 2013-06-19DOI: 10.3329/UJZRU.V31I0.15376
Jesmine Akhtar, A. S. Bhuiyan
An experiment on the induced breeding of the endangered fish, Labeo calbasu (Hamilton-Buchanam) was conducted in the Fish Seed Multiplication Farm,Rajshahi to know the efficacy of two inducing agents (PG and DoM+SGnRH). Three breeding trials of each inducing agent were performed. A total of 24 females weighing from 1.5 kg to 2 kg were given an initial and a resolving dose of 1.5 mg and 6 mg PG extract per kg body weight respectively as treatment-1. On the other hand, a total of 24 females weighing from 1.5 kg to 2 kg were given a single dose of 12 mg DoM + SGnRH/kg as treatment-2. In case of treatment-1, 12 males weighing from 1.5 kg to 1.95 kg were administered a single dose of 1.5 mg PG/kg body weight during resolving dose of female. In treatment-2, 12 males weighing from 1.5 kg to 1.8 kg were administered 3 mg DoM+SGnRH /kg body weight during initial dose of females. In treatment-1, the time interval between initial and resolving dose was 5 hours and ovulation occurred in all the injected females within 6 hours after resolving dose. Ovulation occurred within 6 to 8 hours after the injection of inducing agents for treatment-2. The mean rates of ovulation, fertilization and hatching were 100%, 77.36% and 74.5% respectively in treatment-1. On the contrary, the mean rates of ovulation, fertilization and hatching were 83.33%, 63.83% and 59.66% in treatment-2. Hatchery produced fry were reared in nursery pond for 40 days. In nursery pond. Flour, oil cake and wheat bran were applied as nursery feeds. Both the inducing agents were effective in respect of overall breeding performance. But the best results were obtained with PG although in case of DoM+SGnRH complete breeding takes place within short time with less labour and cost than that of PG . DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15376 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 23-26
在Rajshahi鱼种增殖场进行了濒危鱼类Labeo calbasu (Hamilton-Buchanam)的诱导育种试验，以了解两种诱导剂(PG和DoM+SGnRH)的诱导育种效果。每种诱导剂进行了3次育种试验。共有24只体重在1.5至2公斤之间的雌性小鼠被分别给予每公斤体重1.5毫克和6毫克PG提取物的初始剂量和分解剂量作为处理1。另一方面，共有24只体重在1.5 ~ 2 kg之间的雌性被给予单剂量12 mg DoM + SGnRH/kg作为处理2。在治疗-1的病例中，12只体重从1.5 kg到1.95 kg的雄性在雌性分解剂量期间被给予1.5 mg PG/kg体重的单剂量。在治疗-2中，12只体重在1.5 - 1.8 kg之间的雄性在雌性初始剂量期间被给予3mg DoM+SGnRH /kg体重。在治疗-1中，起始剂量和消解剂量间隔时间为5小时，所有注射雌性在消解剂量后6小时内排卵。注射诱导剂治疗后6 ~ 8小时内排卵-2。处理1的平均排卵率、受精率和孵化率分别为100%、77.36%和74.5%。而处理2的平均排卵率、受精率和孵化率分别为83.33%、63.83%和59.66%。孵化场产苗在苗圃池中饲养40 d。在苗圃池塘里。面粉、油饼和麦麸作为苗圃饲料。两种诱导剂在整体育种性能方面都是有效的。DoM+SGnRH在短时间内完成育种，人工和成本均低于PG，但PG的效果最好。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15376 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 23-26
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Pub Date : 2013-06-18DOI: 10.3329/UJZRU.V31I0.15370
S A Taher, R. Khaton, M. Fakir, M. Hasnat, M M Rahman
This study was conducted to evaluate efficacy of acetic acid solution to eliminate pathogens, prevent food deterioration and extend the shelf-life of dressed broiler meat without adversely affecting its quality. A total of 40 broilers were categorized into two groups. Each group was further categorized into two sub-groups: one for intact skin and another for without skin. Each bird of either group viz. comprised of two portions breast and thigh muscle. Acid spray and acid immersion were used. Bacteriological analysis by total viable count (TVC) and sanitary quality determination of dressed broiler by taste panel scores were performed. Acetic acid treatment reduced the initial level of TVC by about 0.5 to 0.724 log colony forming unit (CFU)/gm of meat. Maximum reduction in TVC (0.724) was achieved when acetic acid immersion treatment was given to meat and it was evident that the meat quality of dressed broiler after treatment with acetic acid remains better up to 5 days of storage. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15370 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 01-04
本试验旨在评价醋酸溶液在不影响肉品质的前提下，对肉品的致病菌杀灭、防止食品变质和延长肉品保质期的效果。将40只肉鸡分为两组。每组进一步分为两个亚组:一个是皮肤完整的，另一个是没有皮肤的。每只鸟均由胸肌和大腿肌两部分组成。采用酸喷法和酸浸法。采用总活菌数(TVC)法对肉鸡进行细菌学分析，并采用味觉评分法对肉鸡卫生质量进行测定。醋酸处理使TVC初始水平降低约0.5 ~ 0.724 log菌落形成单位(CFU)/gm肉。醋酸浸泡处理能最大限度地降低肉鸡的TVC(0.724)，很明显，经醋酸浸泡处理的肉鸡的肉品质在贮藏5天内保持较好的状态。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15370 Univ. j. zool。Rajshahi university . Vol. 31, 2012 pp. 01-04
{"title":"Effects of acetic acid on the total viable counts of microbes and overall acceptability of dressed broiler meat","authors":"S A Taher, R. Khaton, M. Fakir, M. Hasnat, M M Rahman","doi":"10.3329/UJZRU.V31I0.15370","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15370","url":null,"abstract":"This study was conducted to evaluate efficacy of acetic acid solution to eliminate pathogens, prevent food deterioration and extend the shelf-life of dressed broiler meat without adversely affecting its quality. A total of 40 broilers were categorized into two groups. Each group was further categorized into two sub-groups: one for intact skin and another for without skin. Each bird of either group viz. comprised of two portions breast and thigh muscle. Acid spray and acid immersion were used. Bacteriological analysis by total viable count (TVC) and sanitary quality determination of dressed broiler by taste panel scores were performed. Acetic acid treatment reduced the initial level of TVC by about 0.5 to 0.724 log colony forming unit (CFU)/gm of meat. Maximum reduction in TVC (0.724) was achieved when acetic acid immersion treatment was given to meat and it was evident that the meat quality of dressed broiler after treatment with acetic acid remains better up to 5 days of storage. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15370 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 01-04","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"30 1","pages":"01-04"},"PeriodicalIF":0.0,"publicationDate":"2013-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83746304","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}
Pub Date : 2013-06-18DOI: 10.3329/UJZRU.V31I0.15375
M. Ahsan
The genotypic variability and correlation coefficients were studied in 27 indigenous multivoltine varieties of mulberry silkworm, B. mori L. for six egg characters. The genotype was highly significant for all the characters under studied. Least difference between genotypic and phenotypic coefficient of variation were observed. Majority of the characters showed high heritability comparing with dead egg percentage. Furthermore Unfertilized egg percentage showed high genetic advance together with high heritability but HP and EW showed high heritability and low genetic advance. These indicate the importance of additive and non-additive gene effect of these characters respectively. Total number of egg laid by female, hatching percentage, and blue egg percentage showed both positive and negative significant correlation to each other at both the phenotypic and genotypic levels. The results suggest that these characters specially total number of egg laid by female, blue egg percentage and unfertilized egg percentage appeared as importance in selection programme for genetic gain in B. mori. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15375 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 19-22
对27个乡土多期桑蚕品种6个卵性状的基因型变异和相关系数进行了研究。所有性状的基因型均极显著。基因型变异系数与表型变异系数差异最小。与死蛋率相比，大部分性状表现出较高的遗传力。未受精卵率表现出高遗传推进力和高遗传力，HP和EW表现出高遗传推进力和低遗传推进力。这分别说明了这些性状的加性和非加性基因效应的重要性。雌性产卵总数、孵化率和蓝蛋率在表型和基因型水平上均呈显著正相关和显著负相关。结果表明，雌卵总数、蓝卵率和未受精卵率在家蚕遗传增益的选择程序中起重要作用。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15375 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 19-22
{"title":"Selection strategies considering varietal differences with respect to egg characters of mulberry silkworm, Bombyx mori L.","authors":"M. Ahsan","doi":"10.3329/UJZRU.V31I0.15375","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15375","url":null,"abstract":"The genotypic variability and correlation coefficients were studied in 27 indigenous multivoltine varieties of mulberry silkworm, B. mori L. for six egg characters. The genotype was highly significant for all the characters under studied. Least difference between genotypic and phenotypic coefficient of variation were observed. Majority of the characters showed high heritability comparing with dead egg percentage. Furthermore Unfertilized egg percentage showed high genetic advance together with high heritability but HP and EW showed high heritability and low genetic advance. These indicate the importance of additive and non-additive gene effect of these characters respectively. Total number of egg laid by female, hatching percentage, and blue egg percentage showed both positive and negative significant correlation to each other at both the phenotypic and genotypic levels. The results suggest that these characters specially total number of egg laid by female, blue egg percentage and unfertilized egg percentage appeared as importance in selection programme for genetic gain in B. mori. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15375 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 19-22","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"23 1","pages":"19-22"},"PeriodicalIF":0.0,"publicationDate":"2013-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78378806","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}
Pub Date : 2013-06-18DOI: 10.3329/UJZRU.V31I0.15373
F. Flowra, Dil Gulrukh Nahar, Anannya Sen Tumpa, M. Islam
To assess the proximate composition, five dried fish samples of Mystus vittatus , Channa punctatus , Chanda nama , Corica soborna and Trichuirus haumela were selected. The moisture content ranged from 14.06% to 24.58%, protein varied between 44.08% to 65.65% (moisture basis) and 53.45% to 76.39% (dry matter basis), lipid content of the selected dried fishes ranged from 1.91% to 17.76% (moisture basis) and 2.31% to 21.54% (dry matter basis). Ash content varied from 9.63% to 22.73% (moisture basis) and 11.21% to 28.15% (dry matter basis). The experiment was replicated three times and conducted from February, 2009 to August, 2009. Samples were collected from Sayedpur Upazaila, Nilphamari District, the north-west region of Bangladesh. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15373 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 09-11
{"title":"Biochemical analysis of Five Dried Fish species of Bangladesh","authors":"F. Flowra, Dil Gulrukh Nahar, Anannya Sen Tumpa, M. Islam","doi":"10.3329/UJZRU.V31I0.15373","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15373","url":null,"abstract":"To assess the proximate composition, five dried fish samples of Mystus vittatus , Channa punctatus , Chanda nama , Corica soborna and Trichuirus haumela were selected. The moisture content ranged from 14.06% to 24.58%, protein varied between 44.08% to 65.65% (moisture basis) and 53.45% to 76.39% (dry matter basis), lipid content of the selected dried fishes ranged from 1.91% to 17.76% (moisture basis) and 2.31% to 21.54% (dry matter basis). Ash content varied from 9.63% to 22.73% (moisture basis) and 11.21% to 28.15% (dry matter basis). The experiment was replicated three times and conducted from February, 2009 to August, 2009. Samples were collected from Sayedpur Upazaila, Nilphamari District, the north-west region of Bangladesh. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15373 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 09-11","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"22 1","pages":"09-11"},"PeriodicalIF":0.0,"publicationDate":"2013-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84705836","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}
Pub Date : 2013-06-18DOI: 10.3329/UJZRU.V31I0.15372
H. Khanum, S. S. Khanam, M. Sultana, Md. Hafiz Uddin, R. C. Dhar, M. Islam
Parasitic infection is a global health problem especially in developing countries. Municipal wastewaters always contain cysts of parasitic protozoans at some level. The present study was conducted to detect protozoan parasites in different stages of the treatment plant to check its efficacy. Wastewaters were collected from 3 points of the Pagla Sewage Treatent Plant (PSTP) of Dhaka, Bangladesh, throughout the year, 2007-08 at fortnight intervals. Giardia spp., Entamoeba spp., Entamoeba coli , Endolimax nana, Idoamoeba butschlii and Balantidium coli were detected at different times in different stages of the treatment plant. Among these Giardia and Entamoeba spp. were found most frequently than others . Both the prevalence and dominance of protozoan parasites were reduced gradually with the sampling point of the treatment plant which means that the treatment plant was effective in reducing protozoan parasites but not too effective to eliminate them completely. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15372 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 05-08
寄生虫感染是一个全球性的健康问题，特别是在发展中国家。城市污水总是在一定程度上含有寄生原生动物的囊肿。本研究对污水处理厂不同阶段的原生动物寄生虫进行了检测，以检验其效果。在2007-08年度，我们每隔两周从孟加拉国达卡的Pagla污水处理厂的三个地点收集废水。处理厂不同阶段不同时间检出贾第鞭毛虫、内阿米巴原虫、大肠内阿米巴原虫、小内多里马原虫、布氏拟阿米巴原虫和大肠平衡杆菌。其中贾第鞭毛虫和内阿米巴原虫最常见。随着污水处理厂采样点的增加，原生动物寄生虫的患病率和优势度逐渐降低，说明污水处理厂对原生动物寄生虫的减少是有效的，但不足以完全消除它们。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15372 Univ. j. zool。Rajshahi university . Vol. 31, 2012 pp. 05-08
{"title":"Protozoan parasites in a wastewater treatment plant of Bangladesh","authors":"H. Khanum, S. S. Khanam, M. Sultana, Md. Hafiz Uddin, R. C. Dhar, M. Islam","doi":"10.3329/UJZRU.V31I0.15372","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15372","url":null,"abstract":"Parasitic infection is a global health problem especially in developing countries. Municipal wastewaters always contain cysts of parasitic protozoans at some level. The present study was conducted to detect protozoan parasites in different stages of the treatment plant to check its efficacy. Wastewaters were collected from 3 points of the Pagla Sewage Treatent Plant (PSTP) of Dhaka, Bangladesh, throughout the year, 2007-08 at fortnight intervals. Giardia spp., Entamoeba spp., Entamoeba coli , Endolimax nana, Idoamoeba butschlii and Balantidium coli were detected at different times in different stages of the treatment plant. Among these Giardia and Entamoeba spp. were found most frequently than others . Both the prevalence and dominance of protozoan parasites were reduced gradually with the sampling point of the treatment plant which means that the treatment plant was effective in reducing protozoan parasites but not too effective to eliminate them completely. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15372 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 05-08","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"17 1","pages":"05-08"},"PeriodicalIF":0.0,"publicationDate":"2013-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87697651","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}
Pub Date : 2013-06-18DOI: 10.3329/UJZRU.V31I0.15374
R. K. Datta, M. Islam, A. Kabir
Production performance and economic efficiencies of broiler of Cobb 500, cockerel of ISA Brown, Fayoumi, and RIR (Rhode Island Red) and Sonali (derived from RIR♂ × Fayoumi♀) available in Rajshahi were investigated. Identical care and management practices were provided to chickens of all genetic groups reared for meat and egg production. Performance of four meat purpose chickens viz. , Cobb 500, ISA Brown, Fayoumi and Sonali were evaluated in terms of such important parameters as initial body weight (IBW), 5-wk rearing period (RP), achieved body weight (ABW), feed intake (FI), body weight gain (BWG) and feed conversion ratio (FCR). Performance of three egg purpose chickens viz . Fayoumi, RIR and Sonali included weight of day-old chick (WDOC), growth rate (GR), death rate (DR), fertility (FR), hatchability (HT), first laying age (FLA) and monthly egg production (MEP). Economic efficiency parameters viz ., total cost (TC), gross return (GRR), net return (NR) and cost-benefit ratio (CBR) were calculated for both types. In terms of FI, FCR and BWG values, broiler of Cobb 500 was the best preferred and cockerel of ISA Brown the least preferred chicken. Conversely, in terms of the CBR values for meat producers, the cockerel of ISA White (1.58) was the best and the broiler of Cobb 500 (1.15) the worst. Taking the FLA and MEP into account, RIR topped the list (19.1 wks and 23 eggs per month) whereas Cobb 500 ranked at the bottom (25.2 wks and 16 eggs per month). CBR for egg productivity, on the other hand, was highest in Sonali (1.11) followed by RIR and Fayoumi (1.10 each) and Cobb 500 (1.09). As regards the meat productivity, significant correlations existed between TC and NR for all chickens except Sonali , which exhibited a negative correlation between the traits. Negative and non-significant associations prevailed for egg productivity in all the chickens. Although broiler of Cobb 500 was found to be the most popular for meat and RIR for egg, the cockerel of ISA Brown was the chicken that earned the maximum CBR. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15374 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 13-18
研究了Rajshahi地区Cobb 500肉鸡、ISA Brown鸡、Fayoumi鸡、RIR(罗德岛红)和Sonali (RIR♂× Fayoumi♀衍生品种)的生产性能和经济效益。对所有基因群的肉鸡和蛋鸡提供相同的护理和管理措施。采用初始体重(IBW)、5周饲养期(RP)、实现体重(ABW)、采食量(FI)、增重(BWG)和饲料系数(FCR)等重要参数对4只肉用鸡(Cobb 500、ISA Brown、Fayoumi和Sonali)的生产性能进行评价。三产蛋鸡的生产性能。Fayoumi、RIR和Sonali的试验指标包括日龄雏鸡体重(WDOC)、生长率(GR)、死亡率(DR)、育仔率(FR)、孵化率(HT)、首产蛋龄(FLA)和月产蛋量(MEP)。经济效率参数，即总成本(TC)，总收益(GRR)，净收益(NR)和成本效益比(CBR)计算两种类型。在FI、FCR和BWG值方面，Cobb 500肉鸡为最佳选择，ISA Brown肉鸡为最差选择。相反，肉品生产者的CBR值以ISA White(1.58)的公鸡最好，Cobb 500(1.15)的肉鸡最差。考虑到FLA和MEP, RIR排名第一(19.1周，每月23个鸡蛋)，而Cobb 500排名垫底(25.2周，每月16个鸡蛋)。产蛋率的CBR以索纳利最高(1.11)，其次是里尔和法优米(各1.10)和科布500(1.09)。在肉产率方面，除索纳利鸡外，其余鸡的TC与NR均呈极显著相关，性状间呈负相关。所有鸡的产蛋率均呈负相关和不显著相关。虽然Cobb 500的肉鸡最受欢迎，而RIR的鸡蛋最受欢迎，但ISA Brown的小公鸡是获得最大CBR的鸡。DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15374 Univ. j. zool。Rajshahi university . Vol. 31, 2012 . pp. 13-18
{"title":"Assessment of the production performance and economic efficiencies of available chicken breeds (Gallus domesticus L.) in Rajshahi, Bangladesh","authors":"R. K. Datta, M. Islam, A. Kabir","doi":"10.3329/UJZRU.V31I0.15374","DOIUrl":"https://doi.org/10.3329/UJZRU.V31I0.15374","url":null,"abstract":"Production performance and economic efficiencies of broiler of Cobb 500, cockerel of ISA Brown, Fayoumi, and RIR (Rhode Island Red) and Sonali (derived from RIR♂ × Fayoumi♀) available in Rajshahi were investigated. Identical care and management practices were provided to chickens of all genetic groups reared for meat and egg production. Performance of four meat purpose chickens viz. , Cobb 500, ISA Brown, Fayoumi and Sonali were evaluated in terms of such important parameters as initial body weight (IBW), 5-wk rearing period (RP), achieved body weight (ABW), feed intake (FI), body weight gain (BWG) and feed conversion ratio (FCR). Performance of three egg purpose chickens viz . Fayoumi, RIR and Sonali included weight of day-old chick (WDOC), growth rate (GR), death rate (DR), fertility (FR), hatchability (HT), first laying age (FLA) and monthly egg production (MEP). Economic efficiency parameters viz ., total cost (TC), gross return (GRR), net return (NR) and cost-benefit ratio (CBR) were calculated for both types. In terms of FI, FCR and BWG values, broiler of Cobb 500 was the best preferred and cockerel of ISA Brown the least preferred chicken. Conversely, in terms of the CBR values for meat producers, the cockerel of ISA White (1.58) was the best and the broiler of Cobb 500 (1.15) the worst. Taking the FLA and MEP into account, RIR topped the list (19.1 wks and 23 eggs per month) whereas Cobb 500 ranked at the bottom (25.2 wks and 16 eggs per month). CBR for egg productivity, on the other hand, was highest in Sonali (1.11) followed by RIR and Fayoumi (1.10 each) and Cobb 500 (1.09). As regards the meat productivity, significant correlations existed between TC and NR for all chickens except Sonali , which exhibited a negative correlation between the traits. Negative and non-significant associations prevailed for egg productivity in all the chickens. Although broiler of Cobb 500 was found to be the most popular for meat and RIR for egg, the cockerel of ISA Brown was the chicken that earned the maximum CBR. DOI: http://dx.doi.org/10.3329/ujzru.v31i0.15374 Univ. j. zool. Rajshahi Univ. Vol. 31, 2012 pp. 13-18","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"14 5 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2013-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79913179","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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