Pub Date : 2009-01-28DOI: 10.3329/UJZRU.V27I0.1949
Kashmala Latif, Mt Alam, Md. Abu Sayeed, M. A. Hussain, S. Sultana, Mosharrof Hossain
A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilcake (MOC), sesame oilcake (SOC) and linseed oilcake (LOC) as alternative for dietary fish meal (FM) protein for Labeo rohita fingerling for a period of 56 days. Six experimental diets were formulated by replacing 30, 50, 60, 70 and 100% (2 diets) of the total dietary fish meal protein by the combination of FM, SBM, MOC, SOC, and LOC. The combinations of the protein sources were as diet 1 (FM 100%), diet 2 (FM:SBM:MOC::70:15:15), diet 3 (FM:SBM:SOC:LOC::50:20:20:10), diet 4 (FM:SBM:SOC:LOC::40:20:20:20), diet 5 (FM:SBM:SOC:LOC::25:30:15:30), diet 6 (SBM:MOC:SOC:LOC::25:25:25:25) and diet 7 (SBM:SOC:LOC::40:30:30). The performances of these six test diets were compared with the diet 1 (control). All diets were iso-nitrogenous containing about 30% protein. The growth trial was conducted in a flow through system under laboratory condition with three replications for each treatment. On the basis of the growth response, food conversion ratio (FCR), protein efficiency ratio (PER) diet 7 showed better performance followed by diet 1, diet 2, diet 5, diet 3, diet 4 and diet 6 respectively but those were not significantly different (P>0.05). The diet 6 produced the lowest performance. The apparent protein digestibility (APD) values for all the experimental diets were very nearer but significantly different (P 0.05) in diets even from control one which were formulated to evaluate the effects of combination of low cost oil seed cakes as dietary protein source for Labeo rohita fingerling. Hence, it might be concluded that from the economic point of view, that all the low cost oil seed cakes which are locally available can be used in combination form as the alternative protein source for the feed of Labeo rohita . Key words: Oil seed cakes, Labeo rohita , fingerling, protein source. Â doi:10.3329/ujzru.v27i0.1949 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 25-30
本试验旨在评价豆粕(SBN)、芥菜油饼(MOC)、芝麻油饼(SOC)和亚麻籽油饼(LOC)组合替代鱼饲料中鱼粉(FM)蛋白质的效果，为期56 d。以鱼粉、SBM、MOC、SOC和LOC组合代替30%、50%、60%、70%和100%(2种饲料)的试验饲料，配制6种试验饲料。蛋白质来源组合为:饲粮1(鱼粉100%)、饲粮2(鱼粉:SBM:MOC::70:15:15)、饲粮3(鱼粉:SBM:SOC:LOC::50:20:20:10)、饲粮4(鱼粉:SBM:SOC:LOC::40:20 20:20)、饲粮5(鱼粉:SBM:SOC:LOC:: 25:30:30)、饲粮6(鱼粉:MOC:SOC:LOC::25:25:25)和饲粮7 (SBM:SOC:LOC::40:30)。将6种试验饲粮的性能与饲粮1(对照组)进行比较。所有日粮均为含蛋白质约30%的等氮日粮。生长试验在实验室条件下的流动系统中进行，每个处理重复3次。从生长响应来看，饲料转化率(FCR)和蛋白质效率(PER)饲粮7表现较好，其次为饲粮1、饲粮2、饲粮5、饲粮3、饲粮4和饲粮6，但差异不显著(P>0.05)。这种饮食的表现最低。各试验饲料的表观蛋白质消化率(APD)与对照饲料非常接近，但差异显著(P 0.05)。该试验饲料是为评价低成本油籽饼组合作为罗氏斑鳅鱼种饲粮蛋白质源的效果而配制的。综上所述，从经济角度考虑，所有当地可获得的低成本油籽饼均可组合使用，作为罗氏Labeo rohita饲料的替代蛋白质来源。关键词:油籽饼，罗氏Labeo，鱼种，蛋白质来源Â doi:10.3329/ujzru.v27i0.1949 university . j. zool。Rajshahi university . Vol. 27, 2008 pp. 25-30
{"title":"Comparative study on the effects of low cost oil seed cakes and fish meal as dietary protein sources for Labeo rohita (Hamilton) fingerling","authors":"Kashmala Latif, Mt Alam, Md. Abu Sayeed, M. A. Hussain, S. Sultana, Mosharrof Hossain","doi":"10.3329/UJZRU.V27I0.1949","DOIUrl":"https://doi.org/10.3329/UJZRU.V27I0.1949","url":null,"abstract":"A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilcake (MOC), sesame oilcake (SOC) and linseed oilcake (LOC) as alternative for dietary fish meal (FM) protein for Labeo rohita fingerling for a period of 56 days. Six experimental diets were formulated by replacing 30, 50, 60, 70 and 100% (2 diets) of the total dietary fish meal protein by the combination of FM, SBM, MOC, SOC, and LOC. The combinations of the protein sources were as diet 1 (FM 100%), diet 2 (FM:SBM:MOC::70:15:15), diet 3 (FM:SBM:SOC:LOC::50:20:20:10), diet 4 (FM:SBM:SOC:LOC::40:20:20:20), diet 5 (FM:SBM:SOC:LOC::25:30:15:30), diet 6 (SBM:MOC:SOC:LOC::25:25:25:25) and diet 7 (SBM:SOC:LOC::40:30:30). The performances of these six test diets were compared with the diet 1 (control). All diets were iso-nitrogenous containing about 30% protein. The growth trial was conducted in a flow through system under laboratory condition with three replications for each treatment. On the basis of the growth response, food conversion ratio (FCR), protein efficiency ratio (PER) diet 7 showed better performance followed by diet 1, diet 2, diet 5, diet 3, diet 4 and diet 6 respectively but those were not significantly different (P>0.05). The diet 6 produced the lowest performance. The apparent protein digestibility (APD) values for all the experimental diets were very nearer but significantly different (P 0.05) in diets even from control one which were formulated to evaluate the effects of combination of low cost oil seed cakes as dietary protein source for Labeo rohita fingerling. Hence, it might be concluded that from the economic point of view, that all the low cost oil seed cakes which are locally available can be used in combination form as the alternative protein source for the feed of Labeo rohita . Key words: Oil seed cakes, Labeo rohita , fingerling, protein source. Â doi:10.3329/ujzru.v27i0.1949 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 25-30","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75709693","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 : 2009-01-28DOI: 10.3329/UJZRU.V27I0.1943
R. Shahjahan, Afroja Karim, R. Begum, M. S. Alam, A. Begum
The electrophoretic banding pattern of esterase isozymes were examined in eighteen different tissues of Nile tilapia after staining with I± and I² naphthyl acetate as substrate. The tissues were anterior-, mid-, tailmuscle (ventral and tip region), buccal muscle, stomach, fore-, mid-, hind-gut, liver, gill, heart, kidney, eye (lens), eye (iris), fore-, mid- and hind- brain. Altogether five bands named as Est-11.4, Est-21.1, Est-31, Est-40.62 and Est-50.25 were observed different relative mobility. Est-1 and Est-5 denote the fastest and slowest band. Est-3 was present in all the tissues. All five bands were expressed in liver and stomach. Some of the esterase bands showed tissue and substrate specificity, where Est-1 was in fore-, mid- and hind- brain, Est-2 in hind gut, Est-5 in stomach, gill and heart was stained only with I± naphthyl acetate. None of the band was expressed with I² naphthyl acetate only. Key words: esterase, isozyme, Oreochromis, tissue  Doi:10.3329/ujzru.v27i0.1942 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 01-05
以I±和I²乙酸萘酯为底物，对罗非鱼18种不同组织中酯酶同工酶的电泳带型进行了研究。组织为前、中、尾肌(腹侧和尖端)、颊肌、胃、前、中、后肠、肝脏、鳃、心脏、肾脏、眼(晶状体)、眼(虹膜)、前、中、后脑。Est-11.4、Est-21.1、Est-31、Est-40.62和Est-50.25 5个条带的相对迁移率不同。Est-1和Est-5表示最快和最慢的波段。所有组织中都有Est-3。5条条带均在肝脏和胃中表达。部分酯酶条带具有组织特异性和底物特异性，其中Est-1位于前、中、后脑，Est-2位于后肠，Est-5位于胃、鳃和心脏，仅用I±乙酸萘酯染色。没有一个条带仅用I²乙酸萘酯表达。关键词:酯酶，同工酶，Oreochromis，组织Â Doi:10.3329/ujzru.v27i0.1942Rajshahi university . Vol. 27, 2008 pp. 01-05
{"title":"Tissue Specific Esterase Isozyme Banding Pattern in Nile Tilapia ( Oreochromis niloticus )","authors":"R. Shahjahan, Afroja Karim, R. Begum, M. S. Alam, A. Begum","doi":"10.3329/UJZRU.V27I0.1943","DOIUrl":"https://doi.org/10.3329/UJZRU.V27I0.1943","url":null,"abstract":"The electrophoretic banding pattern of esterase isozymes were examined in eighteen different tissues of Nile tilapia after staining with I± and I² naphthyl acetate as substrate. The tissues were anterior-, mid-, tailmuscle (ventral and tip region), buccal muscle, stomach, fore-, mid-, hind-gut, liver, gill, heart, kidney, eye (lens), eye (iris), fore-, mid- and hind- brain. Altogether five bands named as Est-11.4, Est-21.1, Est-31, Est-40.62 and Est-50.25 were observed different relative mobility. Est-1 and Est-5 denote the fastest and slowest band. Est-3 was present in all the tissues. All five bands were expressed in liver and stomach. Some of the esterase bands showed tissue and substrate specificity, where Est-1 was in fore-, mid- and hind- brain, Est-2 in hind gut, Est-5 in stomach, gill and heart was stained only with I± naphthyl acetate. None of the band was expressed with I² naphthyl acetate only. Key words: esterase, isozyme, Oreochromis, tissue  Doi:10.3329/ujzru.v27i0.1942 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 01-05","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87126639","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 : 2009-01-28DOI: 10.3329/UJZRU.V27I0.1954
M. M. Parvin, M. M. Haque
Three predators Scolothrips sexmaculatus Pergande, Phytoseiulus persimilis Athias - Henriot and Stethorus punctillum Weise were used to control two-spotted spider mite, Tetranychus urticae Koch on potted bean plants. Mite population increased exponentially on the untreated plants, but on the predator treated plants, increase of mite population was checked and remained within minimum number. Early release of predator checked the mite population earlier and kept it lower than on late released plants. All the three predators may be used as bio-control agents against two-spotted spider mite. Key words: Control, Tetranychus urticae, Scolothrips sexmaculatus, Phytoseiulus persimilis , Stethorus punctillum and bio-control agents. Â doi:10.3329/ujzru.v27i0.1954 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 51-54
采用三种捕食者分别为sexmaculatus Pergande、Phytoseiulus persimilis Athias - Henriot和Stethorus punctillum Weise，对盆栽豆科植物上的荨麻叶螨进行了防治。在未处理的植物上，螨的数量呈指数增长，而在捕食者处理的植物上，螨的数量增长得到抑制，并保持在最小数量内。捕食者的提前释放比晚释放的植物更早地抑制螨的数量，使其保持在较低的水平。这三种捕食者均可作为双斑蜘蛛螨的生物防治剂。关键词:防治，荨麻疹叶螨，性角蓟马，persiulus persimilis, Stethorus punctillum，生物防治剂Â doi:10.3329/ujzru.v27i0.1954 Univ. j. zool。Rajshahi university . Vol. 27, 2008 pp. 51-54
{"title":"Control of two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) by predators on potted plants","authors":"M. M. Parvin, M. M. Haque","doi":"10.3329/UJZRU.V27I0.1954","DOIUrl":"https://doi.org/10.3329/UJZRU.V27I0.1954","url":null,"abstract":"Three predators Scolothrips sexmaculatus Pergande, Phytoseiulus persimilis Athias - Henriot and Stethorus punctillum Weise were used to control two-spotted spider mite, Tetranychus urticae Koch on potted bean plants. Mite population increased exponentially on the untreated plants, but on the predator treated plants, increase of mite population was checked and remained within minimum number. Early release of predator checked the mite population earlier and kept it lower than on late released plants. All the three predators may be used as bio-control agents against two-spotted spider mite. Key words: Control, Tetranychus urticae, Scolothrips sexmaculatus, Phytoseiulus persimilis , Stethorus punctillum and bio-control agents. Â doi:10.3329/ujzru.v27i0.1954 Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 51-54","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82787471","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 : 2009-01-28DOI: 10.3329/UJZRU.V27I0.1967
F. Yousuf, S. Khurshid
Growth of an organism means a change in length or weight or both with the Increase of age. Increment in size is due to conversion of the food matter into building mass of the body by the process of nutrition. A vector diagram known as growth curve is obtained, when length or weight of an individual are plotted against a specified time period. The curve appears as a sigmoid one, which may vary for the same fish from different localities or for the same fish at different seasons. The rate of growth may easily be influenced by many physical and physiological factors. Different organs of body or have different rates of growth. Theoretically, it is expressed by the formula of cube law (LeCren, 1951), W = KL 3, where, W = weight of fish, L = length of fish, K = constant. This formula is true when the fish showing symmetrical or isometric growth throughout the growth stage. However, in nature, the body proportion of a fish continuously changes with ageing. So the simple cube law expression therefore does not found properly throughout the life history of fish, as the value of K is not constant but subject to great variation. Therefore, a more satisfactory formula is given as follows: W = aL n, or (Log W= log a + n Log L)
有机体的生长是指随着年龄的增长，长度或重量或两者都发生变化。体型的增加是由于营养过程将食物转化为身体的建筑质量。当将个体的长度或体重与特定的时间段相对应时，就得到了一个称为生长曲线的矢量图。曲线呈s型，不同地区的同一种鱼或不同季节的同一种鱼可能会有所不同。生长速度很容易受到许多生理因素的影响。身体的不同器官有不同的生长速度。理论上用立方定律(LeCren, 1951)的公式表示，W = kl3，其中W =鱼的重量，L =鱼的长度，K =常数。当鱼在整个生长阶段表现出对称或等长生长时，这个公式是正确的。然而，在自然界中，鱼的身体比例随着年龄的增长而不断变化。因此，在鱼的整个生活史中，由于K的值不是恒定的，而是有很大的变化，所以简单的立方定律表达式并不能很好地找到。因此，给出一个更令人满意的公式:W= aL n，或(Log W= Log a + n Log L)
{"title":"Length-weight relationshisp and relative conditions factor for the halfbeak Hemiramphus far Forsskål , 1775 from the Karachi coast","authors":"F. Yousuf, S. Khurshid","doi":"10.3329/UJZRU.V27I0.1967","DOIUrl":"https://doi.org/10.3329/UJZRU.V27I0.1967","url":null,"abstract":"Growth of an organism means a change in length or weight or both with the Increase of age. Increment in size is due to conversion of the food matter into building mass of the body by the process of nutrition. A vector diagram known as growth curve is obtained, when length or weight of an individual are plotted against a specified time period. The curve appears as a sigmoid one, which may vary for the same fish from different localities or for the same fish at different seasons. The rate of growth may easily be influenced by many physical and physiological factors. Different organs of body or have different rates of growth. Theoretically, it is expressed by the formula of cube law (LeCren, 1951), W = KL 3, where, W = weight of fish, L = length of fish, K = constant. This formula is true when the fish showing symmetrical or isometric growth throughout the growth stage. However, in nature, the body proportion of a fish continuously changes with ageing. So the simple cube law expression therefore does not found properly throughout the life history of fish, as the value of K is not constant but subject to great variation. Therefore, a more satisfactory formula is given as follows: W = aL n, or (Log W= log a + n Log L)","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77178746","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}
Key words: Agro-chemical, berried, survivability, hatchability. Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 107-108
关键词:农化，浆果，存活率，孵化率朱尔大学。拉杰沙希大学，2007年第26期。107 - 108页
{"title":"Effect of urea and malathion on the freshwater prawn, Macrobrachium lamarrei (H.M. Edwards)","authors":"A. Ali, M. Mannan, S. Parween","doi":"10.3329/UJZRU.V26I0.711","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.711","url":null,"abstract":"Key words: Agro-chemical, berried, survivability, hatchability. \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 107-108","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89335615","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}
Wolbachia are obligatory intracellular bacteria that have evolved to manipulate reproduction and/or metabolism of their arthropod and nematode hosts in a number of ways, all designed to the benefit of their own survival and transmission through hosts’ populations. An updated account of the occurrence, identification, phylogeny and genetics, phenotypic effects, distribution, mechanisms of action, horizontal transmission, infection dynamics, evolutionary consequences and biocontrol implications of the bacteria are presented. Associations between these maternally heritable bacteria and their hosts not only cover the entire range of interactions from parasitism to mutualism but also a complex interplay of both. Wolbachia are transmitted vertically from mothers to offspring, and also horizontally within or between arthropod taxa. They are known to induce cytoplasmic incompatibility (CI) via unviable brood, parthenogenesis induction (PI) through asexual reproduction, feminization (F) by converting males into functional females, and male killing (MK) by causing death to sons of the infected mothers. How these bacteria influence host fitness and population dynamics, and could play an important role in speciation have been reviewed. Possible uses of the bacteria and their predominant phenotypes in control programmes for agricultural pests and human disease vectors have been discussed. Key words: Wolbachia , reproductive manipulation, cytoplasmic incompatibility, parthenogenesis induction, feminization, male killing, biocontrol implications Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 1-19
{"title":"Wolbachia-mediated reproductive alterations in invertebrate hosts and biocontrol implications of the bacteria: an update","authors":"M. Islam","doi":"10.3329/UJZRU.V26I0.691","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.691","url":null,"abstract":"Wolbachia are obligatory intracellular bacteria that have evolved to manipulate reproduction and/or metabolism of their arthropod and nematode hosts in a number of ways, all designed to the benefit of their own survival and transmission through hosts’ populations. An updated account of the occurrence, identification, phylogeny and genetics, phenotypic effects, distribution, mechanisms of action, horizontal transmission, infection dynamics, evolutionary consequences and biocontrol implications of the bacteria are presented. Associations between these maternally heritable bacteria and their hosts not only cover the entire range of interactions from parasitism to mutualism but also a complex interplay of both. Wolbachia are transmitted vertically from mothers to offspring, and also horizontally within or between arthropod taxa. They are known to induce cytoplasmic incompatibility (CI) via unviable brood, parthenogenesis induction (PI) through asexual reproduction, feminization (F) by converting males into functional females, and male killing (MK) by causing death to sons of the infected mothers. How these bacteria influence host fitness and population dynamics, and could play an important role in speciation have been reviewed. Possible uses of the bacteria and their predominant phenotypes in control programmes for agricultural pests and human disease vectors have been discussed. Key words: Wolbachia , reproductive manipulation, cytoplasmic incompatibility, parthenogenesis induction, feminization, male killing, biocontrol implications \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 1-19","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86226916","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}
Studies were made on the number of egg clutch, copulating pairs, duration of mating, duration of egg laying, and weight of egg clutch of Pila globosa by inducing it with Pituitary Gland (PG) and Optic Tentacle cut (OT) under laboratory condition. The effect of inducing the animal with PG and OT cut showed that it resulted in an increase in the number of egg clutch in comparison with that of the control. In control animals the number of egg clutch was found to be 0.30±0.02 which was 20.93% of total egg clutches laid. Whereas in animals with Pituitary Gland (PG) and Optic Tentacles (OT) cut the number of egg clutch were 0.43±0.61 and 0.70±0.86 which were 30.23% and 48.83% of total egg clutches laid respectively. The animals injected with pituitary gland extract and optic tentacle cut showed an increase in the number of egg clutch in comparison with that of the control animals. In control animals, duration of mating, duration of egg laying, and weight of egg clutch were found as, 3.23±0.29hrs., 5.37±1.51hrs., and 8.38±g respectively. The pituitary gland (PG) injected and optic tentacle (OT) cut, duration of mating, duration of egg laying and weight of egg clutch were found as, 3.52±0.26hrs., 4.64±1.63hrs., and 8.54±2.10g.; 3.51±0.33hrs., 5.47±1.19hrs., and 8.45±2.53g respectively. Key words: Pila globosa , induced breeding, Commercial Farming. Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 35-39
{"title":"Induced Breeding of Pila globosa (Swainson 1822) (Gastropoda: Prosobranchia) for Commercial Farming","authors":"S. Jahan, Refiqul Islam, R. Rahman, M. M. Alam","doi":"10.3329/UJZRU.V26I0.695","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.695","url":null,"abstract":"Studies were made on the number of egg clutch, copulating pairs, duration of mating, duration of egg laying, and weight of egg clutch of Pila globosa by inducing it with Pituitary Gland (PG) and Optic Tentacle cut (OT) under laboratory condition. The effect of inducing the animal with PG and OT cut showed that it resulted in an increase in the number of egg clutch in comparison with that of the control. \u0000In control animals the number of egg clutch was found to be 0.30±0.02 which was 20.93% of total egg clutches laid. Whereas in animals with Pituitary Gland (PG) and Optic Tentacles (OT) cut the number of egg clutch were 0.43±0.61 and 0.70±0.86 which were 30.23% and 48.83% of total egg clutches laid respectively. The animals injected with pituitary gland extract and optic tentacle cut showed an increase in the number of egg clutch in comparison with that of the control animals. \u0000In control animals, duration of mating, duration of egg laying, and weight of egg clutch were found as, 3.23±0.29hrs., 5.37±1.51hrs., and 8.38±g respectively. The pituitary gland (PG) injected and optic tentacle (OT) cut, duration of mating, duration of egg laying and weight of egg clutch were found as, 3.52±0.26hrs., 4.64±1.63hrs., and 8.54±2.10g.; 3.51±0.33hrs., 5.47±1.19hrs., and 8.45±2.53g respectively. Key words: Pila globosa , induced breeding, Commercial Farming. \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 35-39","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74219713","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 study was carried out to know the performance of powdered dried Chlorella for culture of rotifer Brachionus angularis . B. angularis was fed with powdered dried Chlorella in treatment 1, live or fresh cultured Chlorella in treatment 2 and baker’s yeast in treatment 3. The rage of physicochemical parameters during culture of rotifer such as water temperature, air temperature, pH and dissolved oxygen were within the suitable ranges for B. angularis culture and more or less similar in all the treatments. The highest population densities of B. angularis recorded in treatment 1, treatment 2 and treatment 3 were 50, 60 and 30 ind/ml, respectively. The mean population densities were 30.1±12.2, 37.4±14.6 and 21.1±6.1 ind./ml in treatment 1, treatment 2 and treatment 3, respectively. The results revealed that the powdered dried Chlorella had significant effect on the population density of B. angularis and was better than that of baker’s yeast. So, when live Chlorella will not be available, powdered dried Chlorella can be successfully used as feed for B. angularis culture. Keywords: Rotifer, Chlorella , yeast, culture medium Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 73-76
{"title":"Culture of rotifer Brachionus angularis Hauer feeding with dried Chlorella","authors":"S. Mostary, M. Rahman, M. A. Hossain","doi":"10.3329/UJZRU.V26I0.704","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.704","url":null,"abstract":"A study was carried out to know the performance of powdered dried Chlorella for culture of rotifer Brachionus angularis . B. angularis was fed with powdered dried Chlorella in treatment 1, live or fresh cultured Chlorella in treatment 2 and baker’s yeast in treatment 3. The rage of physicochemical parameters during culture of rotifer such as water temperature, air temperature, pH and dissolved oxygen were within the suitable ranges for B. angularis culture and more or less similar in all the treatments. The highest population densities of B. angularis recorded in treatment 1, treatment 2 and treatment 3 were 50, 60 and 30 ind/ml, respectively. The mean population densities were 30.1±12.2, 37.4±14.6 and 21.1±6.1 ind./ml in treatment 1, treatment 2 and treatment 3, respectively. The results revealed that the powdered dried Chlorella had significant effect on the population density of B. angularis and was better than that of baker’s yeast. So, when live Chlorella will not be available, powdered dried Chlorella can be successfully used as feed for B. angularis culture. Keywords: Rotifer, Chlorella , yeast, culture medium \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 73-76","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87246835","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}
Seasonal variation of the plankton populations with some water quality parameters of Borobila beel, Rangpur district was carried out during July 2003 to June 2004. Total plankton ranged from 98.3×10 4 to 35.0×10 5 cells/l with mean values of 19.67±9.77×10 5 cells/l. A total of 51 genera of planktons were recorded belonging to Chlorophyceae, Bacillariophyceae, Cyanophyceae, Euglenophyceae, Dinophyceae, Crustacea and Rotifera. Among the phytoplankton, Euglenophyceae was the most dominant group and contributing 33% of total phytoplankton in Borobila beel. The greatest abundance of phytoplankton was recorded in November with an average number 28.83×10 5 cells/l. The minimum abundance of phytoplankton was recorded in January (61.7×10 4 cells/l). Among the zooplanktons Crustacea was dominant, contributing 71% of the total zooplankton population. The abundance of zooplankton showed two peaks of which one in the month of August (81.7x 10 4 cells/l) and another in the month of May (16.7 x10 4 cells/l). Phytoplankton and zooplankton have a nominal positive relationship. Zooplankton was less increased with the increasing of phytoplankton. Key words: Water quality parameters, plankton population, Borobila beel. Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 49-54
{"title":"Seasonal variation of plankton population of Borobila beel in Rangpur district","authors":"Mmr Chowdhury, M. Mondol, C. Sarker","doi":"10.3329/UJZRU.V26I0.698","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.698","url":null,"abstract":"Seasonal variation of the plankton populations with some water quality parameters of Borobila beel, Rangpur district was carried out during July 2003 to June 2004. Total plankton ranged from 98.3×10 4 to 35.0×10 5 cells/l with mean values of 19.67±9.77×10 5 cells/l. A total of 51 genera of planktons were recorded belonging to Chlorophyceae, Bacillariophyceae, Cyanophyceae, Euglenophyceae, Dinophyceae, Crustacea and Rotifera. Among the phytoplankton, Euglenophyceae was the most dominant group and contributing 33% of total phytoplankton in Borobila beel. The greatest abundance of phytoplankton was recorded in November with an average number 28.83×10 5 cells/l. The minimum abundance of phytoplankton was recorded in January (61.7×10 4 cells/l). Among the zooplanktons Crustacea was dominant, contributing 71% of the total zooplankton population. The abundance of zooplankton showed two peaks of which one in the month of August (81.7x 10 4 cells/l) and another in the month of May (16.7 x10 4 cells/l). Phytoplankton and zooplankton have a nominal positive relationship. Zooplankton was less increased with the increasing of phytoplankton. Key words: Water quality parameters, plankton population, Borobila beel. \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 49-54","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86149246","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}
Lymphocystis disease virus (LCDV) is the causative agent of lymphocystis disease, affecting more than 100 teleost species worldwide. Characteristically, LCD is chronic, self limiting and species specific. The greatly hypertrophied cells, called lymphocystis tumor cells, typically occur on the skin, fins and oral region. Lymphocystis cells were ovoid to circular and varied in sizes ranging from 200-250 mm. The lymphocystis disease infected flounder have unsightly appearances that discourage the commercial values. A PCR detection technique was developed to amplify a fragment of LCDV major capsid protein gene (1347bp) which is shortcoming and useful. The PCR result proved that the LCD-virus replicated in the epidermis (fins and skin) not in the spleen, kidney, intestine or brain of Paralichthys olivaceus. Keyword: Lymphocystis disease, LCDV, PCR, Paralichthys olivaceus Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 59-62
{"title":"The lymphocystis diseases in the Olive flounder, Paralichthys olivaceus","authors":"Mosharrof Hossain, Seok-Ryel Kim, M. Oh","doi":"10.3329/UJZRU.V26I0.700","DOIUrl":"https://doi.org/10.3329/UJZRU.V26I0.700","url":null,"abstract":"Lymphocystis disease virus (LCDV) is the causative agent of lymphocystis disease, affecting more than 100 teleost species worldwide. Characteristically, LCD is chronic, self limiting and species specific. The greatly hypertrophied cells, called lymphocystis tumor cells, typically occur on the skin, fins and oral region. Lymphocystis cells were ovoid to circular and varied in sizes ranging from 200-250 mm. The lymphocystis disease infected flounder have unsightly appearances that discourage the commercial values. A PCR detection technique was developed to amplify a fragment of LCDV major capsid protein gene (1347bp) which is shortcoming and useful. The PCR result proved that the LCD-virus replicated in the epidermis (fins and skin) not in the spleen, kidney, intestine or brain of Paralichthys olivaceus. Keyword: Lymphocystis disease, LCDV, PCR, Paralichthys olivaceus \u0000 \u0000Univ. j. zool. Rajshahi Univ. Vol. 26, 2007. pp. 59-62","PeriodicalId":23467,"journal":{"name":"University Journal of Zoology, Rajshahi University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90792395","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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