Our Nature最新文献_第9页

Embryonic Development of Bhakur Catla catla Hamilton 1822 (Cyprinidae) Bhakur Catla Catla Hamilton 1822的胚胎发育(鲤科)

Our Nature Pub Date : 2015-03-03 DOI: 10.3126/ON.V12I1.12257

Jawan Tumbahangfe, B. R. Subba, S. Jha

引用次数: 2

Studies on gonadosomatic index, fecundity and hatchability of domesticated stock of asala Schizothorax richardsonii (Gray) from Nallu River of Lalitpur District Lalitpur地区Nallu河richard Schizothorax richardsonii (Gray)驯化种群性腺指数、繁殖力和孵化率的研究

Our Nature Pub Date : 2015-03-03 DOI: 10.3126/ON.V12I1.12253

S. K. Wagle

引用次数: 7

Knowledge among mothers regarding weaning practice of Jhangad community of Jhorahat V.D.C, Nepal 尼泊尔贾拉哈特V.D.C Jhangad社区母亲关于断奶实践的知识

Our Nature Pub Date : 2015-03-03 DOI: 10.3126/ON.V12I1.12258

D. Subba, S. Bhattarai, R. Roy

引用次数: 7

Effects of Seasonal variation on Growth Performance of Mirror carp (Cyprinus carpio Ver. specularis) in Earthen Nursery Ponds 季节变化对鲤生长性能的影响。在土苗圃池塘

Our Nature Pub Date : 2015-03-03 DOI: 10.3126/ON.V12I1.12252

Md. Istiaque Hossain, M. Khatun, B. M. Kamal, K. Habib, Anannaya Sen Tumpa, B. R. Subba, M. Y. Hossain

{"title":"Effects of Seasonal variation on Growth Performance of Mirror carp (Cyprinus carpio Ver. specularis) in Earthen Nursery Ponds","authors":"Md. Istiaque Hossain, M. Khatun, B. M. Kamal, K. Habib, Anannaya Sen Tumpa, B. R. Subba, M. Y. Hossain","doi":"10.3126/ON.V12I1.12252","DOIUrl":"https://doi.org/10.3126/ON.V12I1.12252","url":null,"abstract":"The experiment was conducted to determine the effect of seasonal variation on growth performance of Cyprinus carpio fry in six earthen ponds during December 2011 to June 2012 covering winter (WS) and summer season (SS). Stocking density was 6250 per decimal with a mean weight of 0.192±0.002 (g). This study was done with three replications for each season. During the WS, the mean values of water parameters were temperature 16.78±2.17, transparency 32.67±1.9 cm, dissolved oxygen 5.88±2.18 mg/l, pH 8.24±0.49, total alkalinity 184.72±22.72, and ammonia nitrogen 0.21±0.05 whereas the mean value of water parameters in SS were temperature 30.56±1.51, transparency 30.61±1.71cm, dissolved oxygen 4.3±1.37 mg/l, pH 8.33±0.24, total alkalinity 274.95±6.73 mg/l, and ammonia nitrogen 0.16±0.05 mg/l. Mean values of survival and specific growth rates were 58.94±0.95 and 2.45±0.03 in WS and 67.85±4.27 and 4.00±1.03, in SS respectively. Mean gross and net productions in WS were 1581.94±71.55 kg ha -1 60 d -1 and 1285.03±69.84 kg ha -1 60 d -1 and, 4262.74±147.81 kg ha -1 60 d -1 and 3964.74±145.74 kg ha-1 60 d -1 , in SS respectively. Therefore, it can be concluded that mirror carp fry production was better in SS than in WS. DOI: http://dx.doi.org/10.3126/on.v12i1.12252 Our Nature (2014), 12(1): 8-18","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"255 1","pages":"8-18"},"PeriodicalIF":0.0,"publicationDate":"2015-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72597356","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}

引用次数: 7

Density-Dependent Growth and Production of Nile Tilapia (Oreochromis niloticus) Fingerlings Relative to Phytoplankton and Periphyton Biomass 尼罗罗非鱼(Oreochromis niloticus)鱼种与浮游植物和周围植物生物量的密度依赖性生长和产量

Our Nature Pub Date : 2014-01-17 DOI: 10.3126/ON.V11I2.9646

W. Jiwyam

{"title":"Density-Dependent Growth and Production of Nile Tilapia (Oreochromis niloticus) Fingerlings Relative to Phytoplankton and Periphyton Biomass","authors":"W. Jiwyam","doi":"10.3126/ON.V11I2.9646","DOIUrl":"https://doi.org/10.3126/ON.V11I2.9646","url":null,"abstract":"The growth, production and survival of Nile tilapia Oreochromis niloticus , with an average individual weight of 0.2 g were used to determine the density-dependent growth and production relative to phytoplankton and periphyton biomass in periphyton-based aquaculture. The trial was conducted in 10 m 2 concrete tanks for a 56 day period. A 10 cm layer of soil was placed at the bottom of each tank. To act as substrates for periphyton, bamboo poles with an approximate submerged surface area of 50% to that of the total tank surface area were vertically posted in the tank bottom. A weekly fertilizer dose of urea and triple superphosphate at a rate of 28 kg N and 7 kg P/ha/week was added. Four stocking densities in triplicate were used: 5, 10, 20, and 40 fish/m 2 (50, 100, 200, and 400 fish/tank). The results indicated that the carrying capacity of periphyton-based tanks for Nile tilapia was 293 g/m 2 in a 56-day culture period. The relationships between gross yields of tilapia (y) and periphyton dry matter (x), or chlorophyll a (x) were described as y = 353.2483-109.1809x, R 2 = 0.5646, P = 0.005, y = 125.5916 + 0.9698x, R 2 = 0.5841, P = 0.004. Provision of substrates at 50% of total tank surface area was sufficient for periphyton production in nutrient-rich aquaculture ponds where grazing rate and fish density in the system are balanced. DOI: http://dx.doi.org/10.3126/on.v11i2.9646 Our Nature 2013, 11(2): 105-115","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"8 1","pages":"105-115"},"PeriodicalIF":0.0,"publicationDate":"2014-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72647357","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}

引用次数: 2

Diet and Feeding Habits of Cyprinus carpio in Relation with Water Quality of Integrated Rice-Fish Farming Ecosystem 稻鱼复合养殖生态系统中鲤的摄食习性与水质关系

Our Nature Pub Date : 2014-01-17 DOI: 10.3126/ON.V11I2.9647

M. R. Mondol, Md. Mosaddequr Rahman, D. A. Nahar, F. Ahamed, Md. Al-Amin Sarker, B. R. Subba, M. Hossain

{"title":"Diet and Feeding Habits of Cyprinus carpio in Relation with Water Quality of Integrated Rice-Fish Farming Ecosystem","authors":"M. R. Mondol, Md. Mosaddequr Rahman, D. A. Nahar, F. Ahamed, Md. Al-Amin Sarker, B. R. Subba, M. Hossain","doi":"10.3126/ON.V11I2.9647","DOIUrl":"https://doi.org/10.3126/ON.V11I2.9647","url":null,"abstract":"This study describes the diets and feeding habits of Cyprinus carpio in integrated rice-fish farming system in the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh, Central Bangladesh during May 1999 to August 1999. Percentage of frequency of occurrence and percentage in number methods were applied for the qualitative and quantitative estimation of plankton. The water quality parameters recorded during the study were within the suitable range for optimal fish growth and plankton populations were also abundant in the water of the rice plots. The phytoplankton population recorded from the gut contents of C. carpio was under 4 groups ( viz ., Chlorophyceae, Euglenophyceae, Cyanophyceae, Bacillariophyceae) and the zooplankton under 3 groups ( viz ., Rotifera, Cladocera, Copepoda). Bacillariophyceae and Chlorophyceae were the dominant phytoplankton group while Rotifera was the dominant zooplankton group in the gut contents of C. carpio . This study also revealed that, gut contents of C. carpio was composed of 48.47% phytoplankton and 51.53% zooplankton indicating omnivorous nature of the fish. The availability of plankton population in the rice plots and the food and feeding habits of C. carpio suggest that, this fish could be a vital candidate for integrated rice-fish aquaculture.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"11 1","pages":"138-151"},"PeriodicalIF":0.0,"publicationDate":"2014-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82131847","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}

引用次数: 4

Medicinal Plants Used by Raji Ethnic Tribe of Nepal in Treatment of Gastrointestinal Disorders 尼泊尔拉吉族部落治疗胃肠疾病的药用植物

Our Nature Pub Date : 2014-01-17 DOI: 10.3126/ON.V11I2.9645

L. Thapa, T. Dhakal, R. Chaudhary, H. Thapa

引用次数: 17

Understanding and Analysing the Coordinates of Diversity of Wetland Birds of Asan Barrage near Paonta Sahib, Northern India 印度北部Paonta Sahib附近牙山坝湿地鸟类多样性坐标的认识与分析

Our Nature Pub Date : 2014-01-14 DOI: 10.3126/ON.V11I2.9599

T. K. Kaushik, Rohtash Chand Gupta

引用次数: 10

Diversity of Snakes in Sarlahi District, Nepal 尼泊尔萨拉希地区蛇的多样性

Our Nature Pub Date : 2014-01-14 DOI: 10.3126/ON.V11I2.9600

Krishna Chettri, D. T. Chhetry

引用次数: 7

Detection of Morphometric Differentiation of Liza aurata (Pisces: Mugilidae) in Southeastern of the Caspian Sea, Iran 伊朗里海东南部aurza的形态分化检测(双鱼座:Mugilidae)

Our Nature Pub Date : 2014-01-14 DOI: 10.3126/ON.V11I2.9595

S. Kohestan-Eskandari, Hossein Anvarifar, H. Mousavi-Sabet

{"title":"Detection of Morphometric Differentiation of Liza aurata (Pisces: Mugilidae) in Southeastern of the Caspian Sea, Iran","authors":"S. Kohestan-Eskandari, Hossein Anvarifar, H. Mousavi-Sabet","doi":"10.3126/ON.V11I2.9595","DOIUrl":"https://doi.org/10.3126/ON.V11I2.9595","url":null,"abstract":"A 13-landmark morphometric truss network system was used for 135 specimens to investigate the hypothesis differentiation of golden grey mullet along the southeastern Caspian Sea. Univariate analysis of variance showed significant differences among the means of the three groups for 35 standardized morphometric measurements out of 78 characters studied. In linear discriminant function analysis (DFA), the overall assignment of individuals into their original groups was 66.7%. The proportions of individuals correctly classified into their original groups were 62.5%, 59.1%, 76.5% in Neka, Behshahr and Galogah populations, respectively. The Principal Component Analysis (PCA) showed that the specimens grouped into 2 areas with high degree of overlap. Clustering analysis based on Euclidean square distances among the studied groups of centroids using an UPGMA resulted segregation of the three populations into two distinct clusters. These results could be of interest for management and conservation programs of this species in the Caspian Sea. DOI: http://dx.doi.org/10.3126/on.v11i2.9595 Our Nature 2013, 11(2): 126-157","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"11 1","pages":"126-137"},"PeriodicalIF":0.0,"publicationDate":"2014-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78868623","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}

引用次数: 8