Pub Date : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10743
Abdus Salam Bhuyan, S. Akther, Naima Aktar
An investigation was conducted during the period from March to December, 2009 to know the status and fish seed production of the hatcheries of six upazilas of Rajshahi district. All the hatcheries were established during 1968 to 2003. The occupations of the hatchery owners are hatchery business and others. Training status of the hatchery owners shows that in maximum cases they had no training and other cases had short term training, consulting with UFO etc. Funding source was self and loan, land ownership was own and lease. Fish disease occurs seldomly. The area of hatchery buildings ranged from 5 to 33 decimals. The water carrying capacity of overhead tanks ranged from 9091.90 to 409135.5 liter. The volume of each cistern ranged from 1.73 m 3 to 3.93 m 3 . The volume of circular breeding and hatching tanks, varied from 2.48 m 3 to 4.02 m 3 and 1.72 m 3 to 3.14 m 3 . The volume of each incubation tank (bottle) ranged from 1.52 m 3 to 1.08 m 3 . The number of permanent workers ranged from 2 to 6 in all seasons. Six native species (rui, catla, mrigel, calibaush, bata and gonia) and six exotic species (silvercarp, bighead carp, grass carp, common carp, Thai pangus and Thai puti) were used for seed production. Two types of hormonal injections, such as Pituitary Gland (PG) and Human Chorionic Gonadotropin (HCG) were used for this purpose. Average fry production were for rui, 140.38 ± 127.02 kg, catla, 37.25 ± 29.24 kg, mrigel, 105.63 ± 54.84 kg, calibaush, 13.50 ± 5.75 kg, gonia, 32 ± 0 kg, bata, 166 ± 113.27 kg, silvercarp, 132.38 ± 96.32 kg, bighead carp, 120.71 ± 116.62 kg, grass carp, 31 ± 11.53 kg, common carp, 140.83 ± 93.83 kg, Thai pangus, 10 ± 0 kg, Thai puti, 42.33 ± 33.71 kg was recorded in some surveyed private hatcheries. The total fry production in some surveyed hatcheries ranged from 85 to 1698 kg with an average of 662.75 ± 513.83 kg. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10743 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 29-32
{"title":"Present status and fish seed production of the hatcheries of six upazilas of Rajshahi District","authors":"Abdus Salam Bhuyan, S. Akther, Naima Aktar","doi":"10.3329/UJZRU.V30I0.10743","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10743","url":null,"abstract":"An investigation was conducted during the period from March to December, 2009 to know the status and fish seed production of the hatcheries of six upazilas of Rajshahi district. All the hatcheries were established during 1968 to 2003. The occupations of the hatchery owners are hatchery business and others. Training status of the hatchery owners shows that in maximum cases they had no training and other cases had short term training, consulting with UFO etc. Funding source was self and loan, land ownership was own and lease. Fish disease occurs seldomly. The area of hatchery buildings ranged from 5 to 33 decimals. The water carrying capacity of overhead tanks ranged from 9091.90 to 409135.5 liter. The volume of each cistern ranged from 1.73 m 3 to 3.93 m 3 . The volume of circular breeding and hatching tanks, varied from 2.48 m 3 to 4.02 m 3 and 1.72 m 3 to 3.14 m 3 . The volume of each incubation tank (bottle) ranged from 1.52 m 3 to 1.08 m 3 . The number of permanent workers ranged from 2 to 6 in all seasons. Six native species (rui, catla, mrigel, calibaush, bata and gonia) and six exotic species (silvercarp, bighead carp, grass carp, common carp, Thai pangus and Thai puti) were used for seed production. Two types of hormonal injections, such as Pituitary Gland (PG) and Human Chorionic Gonadotropin (HCG) were used for this purpose. Average fry production were for rui, 140.38 ± 127.02 kg, catla, 37.25 ± 29.24 kg, mrigel, 105.63 ± 54.84 kg, calibaush, 13.50 ± 5.75 kg, gonia, 32 ± 0 kg, bata, 166 ± 113.27 kg, silvercarp, 132.38 ± 96.32 kg, bighead carp, 120.71 ± 116.62 kg, grass carp, 31 ± 11.53 kg, common carp, 140.83 ± 93.83 kg, Thai pangus, 10 ± 0 kg, Thai puti, 42.33 ± 33.71 kg was recorded in some surveyed private hatcheries. The total fry production in some surveyed hatcheries ranged from 85 to 1698 kg with an average of 662.75 ± 513.83 kg. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10743 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 29-32","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"42 1","pages":"29-32"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82332874","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10744
A. Hasan, S. M. Rahman, K. Ahsan
The genotypic variability and heritability for nine quantitative characters in 65 varieties of silkworm, B. mori L. have been investigated. Variation among genotypes were highly significant (p<0.001) for all the characters indicating the existence of a real difference among the genotypes which are suitable for breeding purposes. The highest heritability was obtained for shell weight followed by filament size (FS), filament length (FL), expected cocoon yield out of 100 dfls (ECY), surviving percentage of larvae (SPL), cocoon weight (CW), egg hatching percentage (EHP) and mature larval weight (MLW). Comparatively high heritability accompanied by a genetic advance was recorded for FL and total number of eggs laid per female (TEL) indicating the importance of additive gene effects of these characters, but shell weight, cocoon weight and filament size showed high heritability and low genetic advance indicating the involvement of non-additive gene systems in the inheritance of these characters. So selection on the basis of these characters, with relatively more emphasis upon filament length and total number of eggs laid per female to obtain high yielding varieties of B. mori is suggested. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10744 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp.33-36
对65个家蚕品种9个数量性状的基因型变异和遗传力进行了研究。所有性状的基因型差异均极显著(p<0.001)，表明适合育种的基因型之间存在真正的差异。壳重的遗传力最高，其次是丝长(FS)、丝长(FL)、百日产茧率(ECY)、幼虫成活率(SPL)、茧重(CW)、卵孵化率(EHP)和成熟幼虫重(MLW)。单株产蛋数和单株产蛋数遗传率较高，遗传率较低，说明加性基因对这些性状的遗传具有重要作用，而壳重、茧重和丝长遗传率较高，遗传率较低，说明非加性基因系统参与了这些性状的遗传。因此，建议在这些性状的基础上进行选择，相对侧重于丝长和每雌产卵总数，以获得高产品种。DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10744 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp.33-36
{"title":"Genetic variability, correlation, path analysis and construction of selection index in mulberry silkworm, Bombyx mori L. I. Genetic variability","authors":"A. Hasan, S. M. Rahman, K. Ahsan","doi":"10.3329/UJZRU.V30I0.10744","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10744","url":null,"abstract":"The genotypic variability and heritability for nine quantitative characters in 65 varieties of silkworm, B. mori L. have been investigated. Variation among genotypes were highly significant (p<0.001) for all the characters indicating the existence of a real difference among the genotypes which are suitable for breeding purposes. The highest heritability was obtained for shell weight followed by filament size (FS), filament length (FL), expected cocoon yield out of 100 dfls (ECY), surviving percentage of larvae (SPL), cocoon weight (CW), egg hatching percentage (EHP) and mature larval weight (MLW). Comparatively high heritability accompanied by a genetic advance was recorded for FL and total number of eggs laid per female (TEL) indicating the importance of additive gene effects of these characters, but shell weight, cocoon weight and filament size showed high heritability and low genetic advance indicating the involvement of non-additive gene systems in the inheritance of these characters. So selection on the basis of these characters, with relatively more emphasis upon filament length and total number of eggs laid per female to obtain high yielding varieties of B. mori is suggested. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10744 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp.33-36","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"12 1","pages":"33-36"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83148133","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}
DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10759 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp.77-79
{"title":"Significance of duck in the transmission of avian influenza virus","authors":"M. Z. Islam, Shahana Ahmed, S. Khan, M. Hossain","doi":"10.3329/UJZRU.V30I0.10759","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10759","url":null,"abstract":"DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10759 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp.77-79","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"54 1","pages":"77-79"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79264219","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10756
Fahmida Aktar Kostori, S. Parween, M. Islam
An investigation was conducted to study the abundance and diversity of Small Indigenous Species (SIS) of fish in the Chalan Beel. Sampling was carried out frequently over a year in selected landing centres, fish markets and catch points. A total of 82 SIS fish belonging to 10 orders, 22 families and 46 genera were recorded. The order Cypriniformes (42.68%) was the most dominant order comprising 35 species. The most dominant family of the order Cypiniformes was Cyprinidae (77.14%) comprising 27 species, and Puntius was the largest genus including 7 species. The most abundant SIS fishes observed during the study period were Tengra ( Mystus vittatus , M. tengara ), Punti ( Puntius sophore and P. ticto ), Taki ( Channa punctatus ), Guchi Baim ( Mastacembelus pancalus ), and the least abundant SIS fish were Aplocheilus panchax , Badis badis , Danio sp. and Chaca chaca . Availability of the species were ranked as Few (39%), followed by Common (23%), Very Common (15%), Rare (16%) and Very Rare (7%). At Mohisluti fish landing centre (under Tarash, Sirajganj) the highest number of species (79, 96.34%) of small fishes were found. Abundance of different SIS fishes were found to vary with the season. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10756 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 67-72
对查兰比尔地区小型本地物种(SIS)的丰度和多样性进行了调查。一年多来，在选定的登陆中心、鱼市和捕捞点经常进行抽样。共记录SIS鱼82条，隶属10目22科46属。鲤形目35种，占42.68%;鲤形目优势科为鲤科(77.14%)27种，最大属为蓬属(7种)。研究期间观测到最多的SIS鱼类是Tengra (Mystus vittatus, M. tengara)、Punti (Puntius sophore和P. ticto)、Taki (Channa punctatus)、Guchi Baim (Mastacembelus pancalus)，最少的SIS鱼类是applocheilus panchax、Badis Badis、Danio sp.和Chaca Chaca。可得性排序为很少(39%)，其次是常见(23%)、非常常见(15%)、罕见(16%)和非常罕见(7%)。在Mohisluti鱼类登陆中心(Tarash, Sirajganj)发现的小鱼种类最多(79种，96.34%)。发现不同SIS鱼类的丰度随季节而变化。DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10756 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp. 67-72
{"title":"Availability of small indigenous species (SIS) of fish in the Chalan Beel - the largest wetland of Bangladesh","authors":"Fahmida Aktar Kostori, S. Parween, M. Islam","doi":"10.3329/UJZRU.V30I0.10756","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10756","url":null,"abstract":"An investigation was conducted to study the abundance and diversity of Small Indigenous Species (SIS) of fish in the Chalan Beel. Sampling was carried out frequently over a year in selected landing centres, fish markets and catch points. A total of 82 SIS fish belonging to 10 orders, 22 families and 46 genera were recorded. The order Cypriniformes (42.68%) was the most dominant order comprising 35 species. The most dominant family of the order Cypiniformes was Cyprinidae (77.14%) comprising 27 species, and Puntius was the largest genus including 7 species. The most abundant SIS fishes observed during the study period were Tengra ( Mystus vittatus , M. tengara ), Punti ( Puntius sophore and P. ticto ), Taki ( Channa punctatus ), Guchi Baim ( Mastacembelus pancalus ), and the least abundant SIS fish were Aplocheilus panchax , Badis badis , Danio sp. and Chaca chaca . Availability of the species were ranked as Few (39%), followed by Common (23%), Very Common (15%), Rare (16%) and Very Rare (7%). At Mohisluti fish landing centre (under Tarash, Sirajganj) the highest number of species (79, 96.34%) of small fishes were found. Abundance of different SIS fishes were found to vary with the season. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10756 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 67-72","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"25 1","pages":"67-72"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89494398","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10758
Sharmin Musa, Sharmin Afroz, H. Khanum
DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10758 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 73-75
DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10758 Univ. j. zool。Rajshahi大学，2011年第30卷，第73-75页
{"title":"Occurence of ecto- and endo parasites in pigeon (Columba livia Linn.)","authors":"Sharmin Musa, Sharmin Afroz, H. Khanum","doi":"10.3329/UJZRU.V30I0.10758","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10758","url":null,"abstract":"DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10758 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 73-75","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"137 1","pages":"73-75"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77814981","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10746
M. Jaman, S. Rahman, M. Haque
The diversity of avifauna at the BARD (Bangladesh Academy for Rural Development), Comilla was studied from March, 2010 to March, 2011. A total of 41 species of birds (20 non-passerines and 21passerines) were identified. Among the total species, 37 (90.25%) were resident and 4 (9.75%) were winter migrants. Regarding to the habitat types utilized by individual species, 11 was bush dwellers, 5 at open place, 5 on human habitations, 4 on tall trees, 10 in garden, 6 found at near the pond. Relative abundance (by number) showed that 10 species were very common, 25 common, 9 fairly common and 7 few. The highest density was recorded for Passer domesticus (480.15 indiv. / acre) and the lowest was for Dicrurus macrocercus (1.29 indiv. / acre) . Among these birds, 18 (43.91%) species were insectivores, 6 (14.64%) piscivores, 6 (14.64%) granivores, 2 (4.88%) frugivores, 4 (9.76%) rodentivores, only one (2.44%) nectar feeder and the rest 3 (7.32%) were mixed feeders. Among the avifauna, 8 (21.63%) species were included in the threatened category, of which 2 (5.41%) were critically endangered, 3 (8.11%) endangered and 3 (8.11%) vulnerable nationally. Direct communication with local people recorded that illegal exploitation of forest, trapping, shooting of birds and collection of young as cage birds are the mentionable causes of decline of the diversity and population of avifauna in the study area. Control of unwise exploitation, plantation of indigenous fruit-trees and creation of awareness, preparation of integrated management action plan (IMAP) and its implementation in co-operation with National and International organizations are mostly essential for conservation of avian diversity in the study area. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10746 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 41-44
2010年3月至2011年3月，对孟加拉国农村发展学院(BARD)的鸟类多样性进行了研究。共鉴定鸟类41种，其中非雀形目鸟类20种，雀形目鸟类21种。其中留鸟37种(90.25%)，冬候鸟4种(9.75%)。各物种利用的生境类型依次为灌木生境11种、露天生境5种、人类生境5种、高树生境4种、园林生境10种、池塘生境6种。相对丰度(按数量计算)显示，10种非常常见，25种常见，9种比较常见，7种较少。家蝇密度最高，为480.15只。/亩)，最小的是大尾蚴(1.29株)。/英亩)。其中食虫鸟类18种(43.91%)、食鱼鸟类6种(14.64%)、花岗鸟类6种(14.64%)、食果鸟类2种(4.88%)、啮齿动物4种(9.76%)，采蜜鸟类1种(2.44%)，混合采食鸟类3种(7.32%)。濒危鸟类8种(21.63%)，其中全国极度濒危2种(5.41%)，濒危3种(8.11%)，易危3种(8.11%)。与当地居民的直接交流记录显示，非法砍伐森林、诱捕、射杀鸟类和收集幼鸟作为笼鸟是导致研究区鸟类多样性和种群数量下降的重要原因。控制不明智的开发，种植本地果树和提高认识，制定综合管理行动计划(IMAP)并与国家和国际组织合作实施，对保护研究区域的鸟类多样性至关重要。DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10746 Univ. j. zool。Rajshahi大学，2011年第30卷，第41-44页
{"title":"Diversity of avifauna at the Bangladesh Academy for Rural Development (BARD), Kotbari, Comilla","authors":"M. Jaman, S. Rahman, M. Haque","doi":"10.3329/UJZRU.V30I0.10746","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10746","url":null,"abstract":"The diversity of avifauna at the BARD (Bangladesh Academy for Rural Development), Comilla was studied from March, 2010 to March, 2011. A total of 41 species of birds (20 non-passerines and 21passerines) were identified. Among the total species, 37 (90.25%) were resident and 4 (9.75%) were winter migrants. Regarding to the habitat types utilized by individual species, 11 was bush dwellers, 5 at open place, 5 on human habitations, 4 on tall trees, 10 in garden, 6 found at near the pond. Relative abundance (by number) showed that 10 species were very common, 25 common, 9 fairly common and 7 few. The highest density was recorded for Passer domesticus (480.15 indiv. / acre) and the lowest was for Dicrurus macrocercus (1.29 indiv. / acre) . Among these birds, 18 (43.91%) species were insectivores, 6 (14.64%) piscivores, 6 (14.64%) granivores, 2 (4.88%) frugivores, 4 (9.76%) rodentivores, only one (2.44%) nectar feeder and the rest 3 (7.32%) were mixed feeders. Among the avifauna, 8 (21.63%) species were included in the threatened category, of which 2 (5.41%) were critically endangered, 3 (8.11%) endangered and 3 (8.11%) vulnerable nationally. Direct communication with local people recorded that illegal exploitation of forest, trapping, shooting of birds and collection of young as cage birds are the mentionable causes of decline of the diversity and population of avifauna in the study area. Control of unwise exploitation, plantation of indigenous fruit-trees and creation of awareness, preparation of integrated management action plan (IMAP) and its implementation in co-operation with National and International organizations are mostly essential for conservation of avian diversity in the study area. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10746 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 41-44","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"50 1","pages":"41-44"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80961319","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10754
H. Rashid, S. Rahman, M. Ahsan
Heterosis and combining ability for total number of eggs laid per female silkworm Bombyx mori L were investigated in a six parent diallel crossing programme in four rearing seasons. Magnitude of heterosis varied from seasons to season and was not consistent over characters. Effect of season was important in the expression of genetic variances and other parameters studied. Considerable amount to heterosis was obtained in the crosses where parents Nistari Oval (G), BSRI-98 and BV-High were involved. Parental performance as judged by general combining ability quantities indicated that BSRI-98 was the best general combining parent in all the rearing seasons. The variance due to the specific combing ability (? 2 sca) was higher than the general combining ability (? 2 gca) in all seasons, indicating the preponderance of non-additive gene action in inheritance of that trait. Majority of the crosses showing significant sca effects had either one or both the parents were good general combiners. Thus the combining ability of parents may be considered as a reliable guide in the prediction of the yield potential of those crosses. The crosses Nistari Oval (G)×BSRI-98, Nistari×BSRI-98 and BSRI-95× Nan Nung7B are recommended for the commercial exploitation of heterosis as an important egg producing breeds in majority of the rearing seasons. DOI: http://dx.doi.org/10.3329/ujzru.v30.10754 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 55-59
采用六亲本双列杂交方法，对家蚕4个饲养季节的产卵总数的杂种优势和配合力进行了研究。杂种优势的大小随季节而变化，在性状上不一致。季节对遗传变异和其他参数的表达有重要影响。在亲本Nistari Oval (G)、BSRI-98和BV-High的杂交组合中获得了相当大的杂种优势。一般配合力评价表明，BSRI-98是各饲养季节的最佳一般配合力亲本。由于特定的梳理能力(?)2 sca)高于一般配合力(?2 gca)，说明非加性基因作用在该性状的遗传中占优势。大多数表现出显著sca效应的杂交，其亲本中有一方或双方是良好的一般配合者。因此，亲本配合力可作为预测杂交品种产量潜力的可靠指标。杂交品种Nistari Oval (G)×BSRI-98、Nistari×BSRI-98和bsri - 95x Nan Nung7B在大部分饲养季节作为重要的产蛋品种推荐用于杂种优势的商业开发。DOI: http://dx.doi.org/10.3329/ujzru.v30.10754 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp. 55-59
{"title":"Heterosis and combining ability estimates for the total number of eggs laid per female in silkworm, Bombyx mori L.","authors":"H. Rashid, S. Rahman, M. Ahsan","doi":"10.3329/UJZRU.V30I0.10754","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10754","url":null,"abstract":"Heterosis and combining ability for total number of eggs laid per female silkworm Bombyx mori L were investigated in a six parent diallel crossing programme in four rearing seasons. Magnitude of heterosis varied from seasons to season and was not consistent over characters. Effect of season was important in the expression of genetic variances and other parameters studied. Considerable amount to heterosis was obtained in the crosses where parents Nistari Oval (G), BSRI-98 and BV-High were involved. Parental performance as judged by general combining ability quantities indicated that BSRI-98 was the best general combining parent in all the rearing seasons. The variance due to the specific combing ability (? 2 sca) was higher than the general combining ability (? 2 gca) in all seasons, indicating the preponderance of non-additive gene action in inheritance of that trait. Majority of the crosses showing significant sca effects had either one or both the parents were good general combiners. Thus the combining ability of parents may be considered as a reliable guide in the prediction of the yield potential of those crosses. The crosses Nistari Oval (G)×BSRI-98, Nistari×BSRI-98 and BSRI-95× Nan Nung7B are recommended for the commercial exploitation of heterosis as an important egg producing breeds in majority of the rearing seasons. DOI: http://dx.doi.org/10.3329/ujzru.v30.10754 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 55-59","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"8 2 1","pages":"55-59"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78085994","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10753
M. Ahsan, M. Kabir
A study on the conservation on breeding colonies of bank myna, Acridotheres ginginianus (Latham 1790), was conducted in Chapai Nawabganj district of Bangladesh during a period from June 2007 to October 2009. The total population in the breeding colonies was estimated as 4,452. The preferable breeding habitats of bird are bank of the river, soil heap/ditches of brickfield and holes of culvert. Environmental calamities such as bank erosion and flooding, drought and rain affect the breeding colonies. Human settlement near breeding habitats, hunting, collecting eggs and nestlings by children, and use of nets to prevent nesting at bank of the river are the main human impacts on the breeding colonies. Major threats are flood, children-fun, predators and human for its meat. Conservation awareness for this species have depicted in this paper. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10753 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 49-53
{"title":"Conservation of breeding colonies of the bank myna, Acridotheres ginginianus (Latham 1790), in Chapai Nawabganj, Bangladesh","authors":"M. Ahsan, M. Kabir","doi":"10.3329/UJZRU.V30I0.10753","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10753","url":null,"abstract":"A study on the conservation on breeding colonies of bank myna, Acridotheres ginginianus (Latham 1790), was conducted in Chapai Nawabganj district of Bangladesh during a period from June 2007 to October 2009. The total population in the breeding colonies was estimated as 4,452. The preferable breeding habitats of bird are bank of the river, soil heap/ditches of brickfield and holes of culvert. Environmental calamities such as bank erosion and flooding, drought and rain affect the breeding colonies. Human settlement near breeding habitats, hunting, collecting eggs and nestlings by children, and use of nets to prevent nesting at bank of the river are the main human impacts on the breeding colonies. Major threats are flood, children-fun, predators and human for its meat. Conservation awareness for this species have depicted in this paper. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10753 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 49-53","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"199 1","pages":"49-53"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80087874","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10740
M. Abdullah, A. Pk, Dkma Saleh, A. R. Khan, N. Islam
The insecticidal and repellent activity tests of the chloroform extracts of fruit, leaf, root and stem of Urena sinuata L. against the red flour beetle Tribolium castaneum L. adults have been conducted. The leaf, root and stem extracts showed high toxicity by giving mortality of the beetles within 30 min. of exposure. The LD 50 values for the 12, 24, 36 and 48h of exposures were 0.354, 0.262, 0.209 and 0.196mg cm 2 for the fruit extract; 0.587, 0.413, 0.355 and 0.299mg cm 2 for the leaf extract; 0.440, 0.389, 0.340 and 0.268mg cm 2 for the root extract and 0.968, 0.661, 0.491 and 0.362mg cm 2 for the stem extract. The insecticidal activity can be arranged in the order of fruit> root> leaf> stem extracts. The root and stem showed repellent activity against T. castaneum adults at P<0.01 and P<0.05 levels of significance, while the fruit and the leaf extracts did not show repellency at all. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10740 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 25-28
研究了水莲果、叶、根、茎氯仿提取物对红粉甲虫成虫的杀避活性。叶、根、茎提取物具有较高的毒性，暴露30分钟内可致甲虫死亡。果实提取物在12、24、36和48h的ld50值分别为0.354、0.262、0.209和0.196mg cm 2;叶提取物为0.587、0.413、0.355、0.299mg cm 2;根提取物分别为0.440、0.389、0.340、0.268mg cm 2，茎提取物分别为0.968、0.661、0.491、0.362mg cm 2。杀虫活性排序为果实>根>叶>茎提取物。根和茎对木栗成虫的驱避活性分别达到P<0.01和P<0.05显著水平，果实和叶提取物对木栗成虫无驱避作用。DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10740 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp. 25-28
{"title":"Insecticidal and repellent activities of the chloroform extracts of Urena sinuata L. against Tribolium castaneum (Herbst) adults","authors":"M. Abdullah, A. Pk, Dkma Saleh, A. R. Khan, N. Islam","doi":"10.3329/UJZRU.V30I0.10740","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10740","url":null,"abstract":"The insecticidal and repellent activity tests of the chloroform extracts of fruit, leaf, root and stem of Urena sinuata L. against the red flour beetle Tribolium castaneum L. adults have been conducted. The leaf, root and stem extracts showed high toxicity by giving mortality of the beetles within 30 min. of exposure. The LD 50 values for the 12, 24, 36 and 48h of exposures were 0.354, 0.262, 0.209 and 0.196mg cm 2 for the fruit extract; 0.587, 0.413, 0.355 and 0.299mg cm 2 for the leaf extract; 0.440, 0.389, 0.340 and 0.268mg cm 2 for the root extract and 0.968, 0.661, 0.491 and 0.362mg cm 2 for the stem extract. The insecticidal activity can be arranged in the order of fruit> root> leaf> stem extracts. The root and stem showed repellent activity against T. castaneum adults at P<0.01 and P<0.05 levels of significance, while the fruit and the leaf extracts did not show repellency at all. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10740 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 25-28","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"20 1","pages":"25-28"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88385017","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 : 2012-05-24DOI: 10.3329/UJZRU.V30I0.10752
N. Ara, Mosarraf Hossain
100 nematode specimens under the genus Aporcelaimellus was identified from different cultivated crops. The genus is within the family Dorylaimidae, and contains robust animals of 0.8 to 3.5 mm body length. The specimen having the medium-sized body, short odontostyle, unsclerotized vulva, conical, dorsally not concave tail with distinctly separated layers of terminal cuticle. Aporcelaimellus prevalence was the highest in banana (80%) and the lowest was in mulberry (20%) during sampling periods. The diagnostic morphology of this nematode was slender vulva lips, thick vagina, and with long anal body with sharply pointed tail. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10752 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 45-48
在不同的栽培作物中鉴定出了100个线虫标本。该属属于Dorylaimidae科，包括体长0.8至3.5毫米的健壮动物。中等体型的标本，齿柱短，外阴未硬化，圆锥形，尾部背面不凹，有明显分离层的末端角质层。在取样期间，香蕉的Aporcelaimellus患病率最高(80%)，桑树最低(20%)。该线虫的诊断形态为外阴唇纤细，阴道厚，肛门体长，尾部尖尖。DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10752 Univ. j. zool。Rajshahi university . Vol. 30, 2011 pp. 45-48
{"title":"A report on Aporcelaimellus sp (Nematoda: Dorylaimidae) from cultivated crops in Rajshahi University Campus","authors":"N. Ara, Mosarraf Hossain","doi":"10.3329/UJZRU.V30I0.10752","DOIUrl":"https://doi.org/10.3329/UJZRU.V30I0.10752","url":null,"abstract":"100 nematode specimens under the genus Aporcelaimellus was identified from different cultivated crops. The genus is within the family Dorylaimidae, and contains robust animals of 0.8 to 3.5 mm body length. The specimen having the medium-sized body, short odontostyle, unsclerotized vulva, conical, dorsally not concave tail with distinctly separated layers of terminal cuticle. Aporcelaimellus prevalence was the highest in banana (80%) and the lowest was in mulberry (20%) during sampling periods. The diagnostic morphology of this nematode was slender vulva lips, thick vagina, and with long anal body with sharply pointed tail. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10752 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp. 45-48","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":"15 1","pages":"45-48"},"PeriodicalIF":0.0,"publicationDate":"2012-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80510143","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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