Lohmann Hatchery Guide

31 31 LOHMANN TIERZUCHT › MANAGEMENT GUIDE › › Males undernourished: follow a rec- ommended feeding programme to provide adequate nutrition; replace un- derweight males. › › Too few males: increase the number of males in the flock; artificially improve the frequency of insemination. › › Seasonal decline of fertility: use young cockerels which are more resist- ant to environmental stress. › › Competition among breeding males: do not use many males; rear all males together; place temporary partitions in large pens. › › Diseased flock: conduct an approved disease control programme. › › Males undernourished: follow a rec- ommended feeding programme to provide adequate nutrition; replace un- derweight males. › › Too few males: increase the number of males in the flock; artificially improve the frequency of insemination. › › Seasonal decline of fertility: use young cockerels which are more resist- ant to environmental stress. › › Competition among breeding males: do not use many males; rear all male together; place temporary partitions in large pens. › › Diseased flock: conduct an approved disease control programme. › › Frozen combs and wattles: provide comfortable housing; properly select and maintain drinking fountains. › › Oldmales: replace with younger males. › › Selected mating in pens: artificially in- seminate infertile hens; replace males in the pen/house. › › Crowded breeders: provide recom- mended floor space; follow recommen- dations of LOHMANN TIERZUCHT GmbH. › › Improper artificial insemination tech- niques or use of old/over-diluted INFERTILITY IN CLEAR EGGS WITH NO EMBRYONIC DEVELOPMENT VERY EARLY DEAD BLASTODERM PHASE – 72 HOURS › › Frozen combs and wattles: provide comfortable housing; properly select and maintain drinking fountains. › › Oldmales: replace with younger males. › › Selected mating in pens: artificially in- seminate infertile hens; replace males in the pen/house. › › Male sterility: replace males in the pen/house. › › Crowded breeders: provide the recom- mended floor space; follow recommen- dations of LOHMANN TIERZUCHT GmbH. › › Improper artificial insemination techniques or use of old / over-dilut- ed semen: follow recommendations of LOHMANN TIERZUCHT GmbH. semen: follow recommendations of LOHMANN TIERZUCHT GmbH. › › Eggs damaged by environment: gather eggs frequently with accurate control of conditions. › › Eggs stored for too long or incor- rectly: store eggs at the wrong tem- perature, or too cold or too warm, or at an instable temperature and humid- ity; bad and incorrect or inappropriate S.P.I.D.E.S. process; long interval from one S.P.I.D.E.S. process to another. › › Shaker eggs and trouble inhandlingand transport: pay attention to gentle handling. › › Improper disinfections: follow disin- fections recommendations and dosage and time recommendations. › › Eggs of the day: incubate eggs with- out waiting for minimum time from the production day; improve blastoderm mortality; instable pH is wrong for incu- bation; a minimum of 48 hours is neces- sary to stabilise pH and conditions.