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Animal Reproduction Dreamer. Objectives A.Define common terms associated with reproduction B.Label reproductive organs and describe their function C.Compare.

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Presentation on theme: "Animal Reproduction Dreamer. Objectives A.Define common terms associated with reproduction B.Label reproductive organs and describe their function C.Compare."— Presentation transcript:

1 Animal Reproduction Dreamer

2 Objectives A.Define common terms associated with reproduction B.Label reproductive organs and describe their function C.Compare estrous cycles and gestation of different species D.List stages of development from conception to parturition E.Describe signs of parturition and dystocia F.Describe the purpose and benefits of reproductive technologies

3 zPregnancy -- carrying a fetus zFertilization -- the union of the EGG and SPERM nuclei zConception - occurrence of fertilization zOvulation - release of an ovule from the female. zGestation - the time from fertilization or conception of a female until she gives birth A. Define common terms associated with reproduction

4 zOvaries - FEMALE reproductive gland in which eggs are formed and hormones are produced. Egg or Ovule- Female Reproductive Cell zTestes - MALE reproductive gland that produces sperm and testosterone. Sperm- Male Reproductive Cell Semen- Fluid that carries sperm A. Define common terms associated with reproduction

5 Female Reproductive Organs B. Label reproductive organs and describe their function

6 Function of Female Reproductive Organs zVulva -opening of reproductive tract zVagina - channel for birth and copulation zCervix - divides vagina and uterus zUterus - provides nourishment for fetus zHorns of Uterus - where fetus grows zFallopian Tube - where fertilization occurs zOvaries - produces eggs and hormones B. Label reproductive organs and describe their function

7 Male Reproductive Organs B. Label reproductive organs and describe their function

8 Function of Male Reproductive Organs zTestes - produce sperm and testosterone zEpididymis - collects and stores sperm zVas deferens - transports sperm zPenis - places sperm in female zCowper's Gland zProstate Gland produce semen zSeminal Vesicle zScrotum - protects testes & maintains temp. zSheath - opening of reproductive tract B. Label reproductive organs and describe their function

9 zEstrous Cycle-Time between periods of estrus, or “heat” -often influenced by of hours of light in the day C. Compare estrous cycles and gestation of different species SpeciesEstrous Cycle Length of Estrus (heat) Ovulation Cow hours10-14 hours after estrus Mare226-8 days1-2 days before estrus ends Doe (goat) hoursAt end of estrus Doe (rabbit)Constant 8-10 hours after mating Sow hoursMid estrus Ewe hoursLate estrus Dog-9 days1-2 days after estrus begins Cat days24 after mating

10 1. Estrus- also known as “heat.” The period of time when female is receptive to male and conception can occur. - Hormone: Estrogen 2. Metestrus- Follows estrus. Usually when ovulation occurs. - Hormone : LH (leutenizing hormone) 3. Diestrus- Period of cycle when system assumes pregnancy. -Hormone: Progesterone 4. Proestrus- If not pregnant, prepares body for Estrus - Progesterone drops 1-Estrus 2-Metestrus 3- Diestrus 4-Proestrus Estrous Cycle C. Compare estrous cycles and gestation of different species

11 Gestation zLength of PREGNANCY. zBegins with FERTILIZATION and ends with PARTURITION (BIRTH). zAll animals have different gestation lengths. Usually the LARGER the animal, the LONGER the gestation. C. Compare estrous cycles and gestation of different species

12 Cattle zGestation- 283 days or 9 Months zBreeding Season- Dairy: Year round Beef: Summer-fall zCycle: Year round, every 21 days C. Compare estrous cycles and gestation of different species

13 Sheep & Goats z Gestation: days or 5 months zBreeding Season- Fall (dairy goats year round) zCycle: Late fall when days get short “Short day breeders” C. Compare estrous cycles and gestation of different species

14 Swine zGestation- 115 days OR 3 months, 3 weeks, 3 days z Breeding Season- year round z Cycle- Year round every 21 days C. Compare estrous cycles and gestation of different species

15 Horses zGestation- 336 days or 11 months zBreeding Season- Spring z Cycle- Spring/Summer when days are long “Long day breeders” C. Compare estrous cycles and gestation of different species

16 Rabbits zGestation- 30 days zBreeding Season- Year round z Cycle- Constantly, year round C. Compare estrous cycles and gestation of different species

17 Chickens zGestation- 21 days zBreeding Season- Year round or spring zCycle- Year round, but more productive when days are long C. Compare estrous cycles and gestation of different species

18 D. List stages of development from conception to parturition z3 periods of development from pregnancy to birth - Zygote- A cell formed by union of egg and sperm - Embryo- Organism in early stages of development - Fetus- Unborn animal in late stages of development

19 Stages of Development Newborn Calf Zygote Embryo Fetus D. List stages of development from conception to parturition

20 E. Describe signs of parturition and dystocia zParturition- The act of giving birth zSigns: -Milk develops in udder -Abdomen drops -Nesting -Restlessness or pacing -Abdomen muscles contract (watch for young!)

21 Stages of Parturition zStage 1 - Preparatory Stage (Labor) zStage 2 – Delivery of Fetus zStage 3 - Expulsion of the placenta zStage 4 - Period of Rest E. Describe signs of parturition and dystocia Video

22 zCauses: -Presentation -Oversized fetus -Multiple births -Exhaustion, uterine contractions stop zSolutions: Call vet or assist yourself -Cesarean Section (c-section) -Assist manually Dystocia- Difficulty giving birth E. Describe signs of parturition and dystocia

23 Presentation (position the fetus is coming out) Leg Back Upside down & Backward Breech Head Back Normal E. Describe signs of parturition and dystocia

24 F. Describe the purpose and benefits of reproductive technologies Reproductive Technology zAny method of reproduction that is different from natural methods

25 1-Artificial Insemination zplacing sperm into the female reproductive tract by means other than natural mating F. Describe the purpose and benefits of reproductive technologies

26 Steps of Artificial Insemination 1- Collect & Store Semen -Collect Semen -Extend sample and place in straws -Store in liquid nitrogen F. Describe the purpose and benefits of reproductive technologies

27 2- Inject semen into female reproductive tract at the right stage of estrus Steps of Artificial Insemination F. Describe the purpose and benefits of reproductive technologies

28 Advantages of A.I. zWider selection and use of outstanding sires Example - one bull if used for natural reproduction could have calves per year for 8-9 years = calves; one bull used to A.I. Could produce over 100,000 calves. F. Describe the purpose and benefits of reproductive technologies

29 Advantages of A.I. zRapid Genetic and herd improvement zCan overcome physical barriers to mating example - behavior or injuries zDanger of the bull is eliminated zElimination of cost of purchasing and keeping a bull F. Describe the purpose and benefits of reproductive technologies

30 Disadvantages of A.I. zSkilled technicians are required zCloser supervision of female is required F. Describe the purpose and benefits of reproductive technologies

31 Synchronized Ovulation zthe process of causing a herd of cows or heifers to come into estrus and ovulate at or near the same time zMethods: -Prostoglandin F2a -- hormone which can be used to synchronize estrus Examples: Brand Names -- Lutalyse, Esrumate, Bovilene, Synchro-Mate B F. Describe the purpose and benefits of reproductive technologies

32 Embryo Transfer zThe transfer of FERTILIZED egg(s) from a DONOR female to one or more RECIPIENT females F. Describe the purpose and benefits of reproductive technologies

33 “Scamper” First Million Dollar Cowgirl, 1990 Most Professional Rodeo 11 Consecutive Barrel Racing Championships First WPRA Member listed in Guinness Book of World Records, 1987&92 WPRA Record Most NFR Qualifications, 19 (consecutive) All won on her beloved horse, “Scamper” Few people involved in the horse industry haven't heard the legendary story of Gill's Bay Boy, affectionately known as "Scamper," and his jockey and partner Charmayne James who together set the world of pro rodeo on fire beginning in Scamper came to Charmayne as an untrained young prospect with a renegade reputation and was best known in those days for bucking off ranch cowboys. At the tender age of 14 Charmayne did the inconceivable. She trained and cared for Scamper and in the process revealed the limitless potential concealed beneath his common exterior. With dedication and careful attention to conditioning Charmayne produced an equine legend whose historical achievements will not soon if ever be duplicated. The young horsewoman was herself a prodigy honing her training skills to take Scamper from the anonymity of the feedlot to the spotlight of the rodeo arena. The two inevitably raced to unforgettable performances in arenas from Houston to Las Vegas and most everywhere in between along the way. Scamper and Charmayne's list of accolades together are endless and include Scamper's induction into the PRCA Hall of Fame, as well as Charmayne's place in the National Cowgirl Hall of Fame, National Cowboy Hall of Fame, and Texas Cowboy Hall of Fame, among others. F. Describe the purpose and benefits of reproductive technologies

34 Cloning zThe production of an exact GENETIC COPY of an organism Is Cloning a NEW technology?? F. Describe the purpose and benefits of reproductive technologies

35 Cloning F. Describe the purpose and benefits of reproductive technologies

36 Mule: Cloned at USU F. Describe the purpose and benefits of reproductive technologies

37 Sheep: Cloned in 1996 “Dolly” F. Describe the purpose and benefits of reproductive technologies

38 Clone a Ding Dong zCarefully hold the ding dong and remove the filling with the straw zSuck the nucleus (cream) out of the donor cell and insert it into the egg cell (ding dong) zDon’t break it open. Damaged cells won’t survive! F. Describe the purpose and benefits of reproductive technologies

39 Clone a Ding Dong zDing Dong= Donor Cell zDing Dong filling= zCup= cell of animal you want cloned zColored Cream= Nucleus of animal to be cloned (genetic info) zStraw=Pipette F. Describe the purpose and benefits of reproductive technologies

40 Clone a Ding Dong zWhat does the ding dong represent? zWhat does the cup represent? zWhy do we have to take the nucleus out of the ding dong first? zWhat will the ding dong grow up to be? ( a cup or a ding dong? ) why? F. Describe the purpose and benefits of reproductive technologies

41 Bell Quiz zWhat is the difference between “estrous” and “estrus?” zHow long is the gestation of a sheep or goat? zHow does daylight effect the estrous cycle of some animals? zWhat is unique about a rabbit’s reproductive system that allows them to reproduce quickly?

42 Bell Quiz zWhat is the definition of dystocia? zWhat does the word, parturition mean? zName 3 signs that could indicate that an animal will give birth soon. zWhat purpose does the placenta serve in the growth and development of a fetus? zWhat is a zygote?

43 Bell Quiz zWhat reproductive technology is used to enhance the # of offspring a superior SIRE can have zWhat reproductive technology is used to enhance the # of offspring a superior DAM can have zWhat are 2 benefits of Artificial insemination? zWhat are 2 disadvantages of Artificial Insemination?

44 A BCDE

45 A C B D F E Label the following organs:


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