Beitrage zur tropischen Landwirtschaft und Veterinarmedizin最新文献_第3页

Incidence and seasonality of reproductive disease conditions in small ruminants in Nsukka area, Nigeria. 尼日利亚恩苏卡地区小反刍动物生殖疾病的发病率和季节性

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

L O Wosu, B M Anene

引用次数: 0

[Mortality by crushing in domestic pigs: study of the causes and their relationship to the time and the month of the year in the climatic conditions of Cuba]. [家猪碾压致死:原因及其与古巴气候条件下一年中的时间和月份的关系的研究]。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

J F Cabrera, R Ferrer, C A Bulnes, M Quintana

{"title":"[Mortality by crushing in domestic pigs: study of the causes and their relationship to the time and the month of the year in the climatic conditions of Cuba].","authors":"J F Cabrera, R Ferrer, C A Bulnes, M Quintana","doi":"","DOIUrl":"","url":null,"abstract":"In the course of 3 years a complex of 25,000 pigs were investigated once per week for the dead among the 398 sucking piglets, and in the case of losses due to crushing to death the type of lesions and the connection with diseases was investigated. Of the piglets investigated, 88 were crushed to death (21.2%), among them 65 (73.8%) diseased--mainly infected by coli bacilli (60 = 68.2%)--and 23 (5.8%) healthy animals. The losses due to crushing to death were highest in January and differed from all other months of the year (p less than 0.05). Another peak of losses in July was only significant (p less than 0.05) as compared with the values of April and November. January and July also exhibited the highest proportion of coli-infected piglets. The most frequent lesions were edema and cyanosis of the skin, of the mucous membrane, and the hypodermic tissue, haemothorax and haemoperitonaeum, liver cracks, lung cracks, kidney cracks, stomach cracks, large intestine cracks, and multiple fractures of the ribs and of the skull. It is concluded that the losses due to crushing to death can be related to the decrease in vitality of the piglets due to diseases, caused in winter by decreased vitality and in summer by pressure caused by coli infection.","PeriodicalId":75586,"journal":{"name":"Beitrage zur tropischen Landwirtschaft und Veterinarmedizin","volume":"28 2","pages":"191-7"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13509963","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: 0

Distribution of freshwater gastropods in the lower River Niger and Cross River basins of southeastern Nigeria with reference to their trematode infections. 尼日尔河下游和尼日利亚东南部克罗斯河流域淡水腹足动物的分布及其吸虫感染。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

F C Okafor

引用次数: 0

[The effect of the sperm collection rhythm on the sperm production of insemination bulls in subtropical climate conditions]. [亚热带气候条件下精子采集节律对授精公牛精子产量的影响]。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

W Hartwig, E Hartwig, M Manzelgy

引用次数: 0

Crossbreeding as a tool for genetic improvement of chickens in suboptimum environments. 杂交作为亚优环境下鸡遗传改良的工具。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

A M Katule

{"title":"Crossbreeding as a tool for genetic improvement of chickens in suboptimum environments.","authors":"A M Katule","doi":"","DOIUrl":"","url":null,"abstract":"A 2-phase crossbreeding study was undertaken to explore prospects of improving the performance of chickens under extensive production conditions in Tanzania. The first phase was carried out under reasonably good feeding and housing conditions and involved one imported meat and egg type each as well as a local breed and their crosses. In the second phase, 15 genetic groups with graded proportions of inheritance from the 3 parental breeds were compared for their performance under relatively poor conditions of feeding and general management. The results revealed that under good production conditions the performance in a particular trait increased with increasing levels of inheritance from the exotic breed which had been developed mainly for that trait. Under poor management conditions, the trend was rather obscure, with the superiority of germ plasma from the exotic breeds expressed in the crosses rather than in the parental breeds. The disparity between the results obtained in the two phases is attributed to genotype x environmental interaction, heterosis, heterosis x environment interaction, and maternal and sex-linked influences. It is concluded that the genetic disposition of the high performers should be adapted to the local production conditions by forming synthetic breeds based on crossbreeding.","PeriodicalId":75586,"journal":{"name":"Beitrage zur tropischen Landwirtschaft und Veterinarmedizin","volume":"28 3","pages":"325-35"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13551007","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: 0

Reproductive performance of Friesian cows in Saudi Arabia. II. Resting and service interval, conception rate, and number of services per conception. 沙特阿拉伯弗里西亚奶牛的繁殖性能。2休息和服务间隔，受孕率，以及每个受孕服务的数量。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

M S Salah, H H Mogawer

引用次数: 0

[The effect of the day of parturition in the technological cycle of maternity on the morbidity of diarrhea in lactating piglets]. [孕产工艺周期中分娩日期对哺乳仔猪腹泻发病率的影响]。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1990-01-01

R Ferrer, G Guzmán, J Guerrero, J Cabrera

{"title":"[The effect of the day of parturition in the technological cycle of maternity on the morbidity of diarrhea in lactating piglets].","authors":"R Ferrer, G Guzmán, J Guerrero, J Cabrera","doi":"","DOIUrl":"","url":null,"abstract":"The study investigated the frequency of piglet diarrhoea from birth to weaning (33rd day) in a farrowing pigsty with 3 rows of boxes during 7 rearing cycles with 240 piglets each, always related to the day of birth in connection with the onset of the cycle. 3 groups were differentiated according to the day of birth: 3 and 4, 5, 6 and 7, based on the disposition of the sow. Also investigated was the position of the litters in the middle or one of the marginal rows of boxes of the pigsty. The germ density of the air during 2 cycles each of the rainy and dry seasons was investigated in the empty pigsty as well as after the 6th day of occupation by means of sedimentation in endo agar. A significant influence was found of the day birth (p less than 0.05) and of the interaction of row of boxes and day of birth (p less than 0.05) as well as the row of boxes and season (p less than 0.05) on the morbidity and mortality due to piglet diarrhoea. The higher levels occurred in the groups of animals born later and housed in the central row of boxes. The number of units forming colonies increased significantly (p less than 0.05) in 10 cm2/min samples on endo agar from the 0th to the 6th day of the cycle and reached 100% of the samples from which also E. coli K 88 was isolated.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":75586,"journal":{"name":"Beitrage zur tropischen Landwirtschaft und Veterinarmedizin","volume":"28 1","pages":"101-7"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13456274","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: 0

Management of clinical cases of peste des petits ruminants (PPR) disease in goats. 山羊小反刍兽疫临床病例的管理。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1989-01-01

L O Wosu

引用次数: 0

Photoperiod and thermal effects on the productive and reproductive performance of Ross Tented egg-type and Hubbard broiler chicks living under subtropical conditions. 亚热带条件下光周期和热效应对罗斯帐蛋型和哈伯德肉鸡生产和繁殖性能的影响。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1989-01-01

G A el-Sayiad, I F Marai, M A Abdelrazik, M N Hassan

{"title":"Photoperiod and thermal effects on the productive and reproductive performance of Ross Tented egg-type and Hubbard broiler chicks living under subtropical conditions.","authors":"G A el-Sayiad, I F Marai, M A Abdelrazik, M N Hassan","doi":"","DOIUrl":"","url":null,"abstract":"In egg-type pullets, the body weight was significantly higher under constant 20 L:4 D and 10 L:14 D up their 72nd day of age (d), followed by 20 L:4 D, than in the control (10 L:14 D). The latter variant positively affected the liveweight gain and earlier sexual maturity. Constant 20 L:4 D also increased earlier sexual maturity, plasma corticoid content of the blood, and egg number significantly over the control. Egg number was also ensured and stimulated by 10 L:14 D up to the 72nd d and their 20 L:4 D. In the treatment 20 L:4 D changed to 10 L:14 D maturity and egg number decreased significantly. Reduction of the 20 L:4 D d in steps of 2 h/week to 10 L:14 D on the 49th day resulted in a significant increase in egg number and liveweight. Reversing this light regime reduced both features. Under elevated temperature (3 to 5 K above normal) this reduction was postponed to the 11th d and following. The elevated temperature increased significantly the carcass traits, except the flack, neck, and abdominal fat. The combination of the light and temperature regime did not yield any significant differences for the carcass weight at conventional temperatures and for the body weight.","PeriodicalId":75586,"journal":{"name":"Beitrage zur tropischen Landwirtschaft und Veterinarmedizin","volume":"27 1","pages":"109-17"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13891295","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: 0

An epidemic of fatal posterior paralysis and sudden death in goats: a case report. 山羊致命后麻痹和猝死流行1例报告。

Beitrage zur tropischen Landwirtschaft und Veterinarmedizin Pub Date : 1989-01-01

R M Maselle, G K Mbassa, S F Jiwa, E Ndemanisho

引用次数: 0