Wyniki wyszukiwania - Biblioteka Nauki

1

Wpływ sezonu na rozród zwierząt doświadczalnych - chomik dżungarski

100%

Kisiel K. , Nowak Z. , Marczak U.

|

tom 66

2

Organizacja rozrodu oraz czynniki wplywajace na plodnosc bydla ras miesnych

86%

Wieczorek J.

|

2008

|

tom 65

174-175

3

Sezonowosc rozplodu samic szynszyli na najstarszych polskich fermach

86%

Szeleszczuk O. , Rogoz E.

|

2005

|

tom 01

|

nr 2

337-342

4

Owulacja u kotek - skorygowane spojrzenie

72%

Max A.

|

tom 96

|

nr 03

5

Znaczenie leptyny w zapoczątkowaniu i utrzymaniu laktacji u owiec

72%

Molik E. , Hell K. , Staron M. , Flis Z.

|

nr 5

6

Zdrowie i rozród bydła mięsnego to najważniejsze czynniki w opłacalności ich hodowli

72%

Twardon J. , Dejnek G. J.

|

tom 15

|

nr 2

7

Zarządzanie rozrodem bydła mięsnego - prawdziwe wyzwanie. Cz.I. Podstawy zarządzania i wprowadzanie jałówek do rozrodu

72%

Ptaszynska M.

|

nr 09

8

Wybrane czynniki podwzgórzowe integrujące rozród i kontrolę bilansu energetycznego u zwierząt

72%

Kirsz K. , Zieba D. A.

|

nr 01

EN

Mammalian reproduction is the most energy-consuming biological process. However, chronic dietary energy deficits, as well as energy surpluses can impair reproductive capacity, including the ability to produce viable gametes, and interrupt pregnancy or lactation. Thus, there is no doubt that the mechanisms controlling energy balance are integrated with those that control reproduction. There is functional evidence for a crucial connection between those mechanisms in the gonadotropin-releasing hormone (GnRH) cells of the hypothalamus, which are part of the hypothalamo-pituitary-gonadal (HPG) axis. Recent research has shown that the multiple hypothalamic peptidergic systems responsible for the homeostatic control of energy balance are involved in signaling to GnRH neurons. This group includes neuropeptyd Y (NPY), melanin-concentrating hormone (MCH), proopiomelanocortin (POMC), as well as periphery factors, such as leptin, ghrelin and insulin. However, the discovery of kisspeptin and gonadotropin-inhibitory hormone (GnIH) sheds a new light on mechanisms by which reproductive activity is regulated, also in the context of diurnal and annual photoperiod-driven cycles of mammals’ energy requirements. Thus, it seems clear that those two peptides are very important in linking the processes of energy balance maintenance and reproduction.

9

Przyczyny i skutki letnio-jesiennego syndromu niepłodności u loch

72%

Tarasiuk K.

|

2010

|

nr 6

10

Dopłaty do mamek jak Yeti

72%

Rutkowski A.

Tygodnik Poradnik Rolniczy

|

2017

|

nr 08

11

Kisspeptyna - neurohormon regulujacy sezonowosc rozrodu

72%

Klocek-Gorka B. , Zieba D. A.

|

nr 08

7-9

12

Sezonowość rozrodu i charakterystyka masy tuszy dzików pozyskanych na Wyżynie Lubelskiej

72%

Flis M. , Grela E. R. , Gugala D. , Rataj B.

Medycyna Weterynaryjna

|

2018

|

tom 74

|

nr 07

EN

The purpose of the study was to assess the seasonality of wild boar reproduction and the weight of wild boar carcasses obtained in the hunting district of Lublin in the years 2012-2017. The study was based on the measurement of the weight of wild boar carcasses obtained by hunting and delivered to collection centres or kept by hunters for their own use. The animals were weighed upon evisceration. After determining the weight of the carcass, the age of the animal was determined on the basis of the growth and replacement of particular groups of deciduous teeth by permanent teeth as well as changes in the permanent dentition of the mandible. The seasonality of reproduction was then assessed on the basis of the estimated age and the length of pregnancy. The results show clear disturbances in reproductive seasonality. Less than 40% of farrowings occurred in the hitherto typical period, that is, in March and April. In fact, the farrowings took place in all months of the year, with the fewest in January and September. Body mass increased in the individual’s life, thus the highest growth rate of over 400% occurred in the youngest wild boars. The carcass weights in particular age groups (piglets, yearlings, 2-year-olds and older) were significantly higher than those recorded elsewhere in Poland. The piglets weighed on average 37.0 kg, yearlings 65.5 kg, and the oldest group 100.3 kg. The results show that the improvement in habitat conditions, combined with progressive climate changes, results in an earlier somatic and sexual maturation. This, in turn, results in higher reproduction rates and a dynamic population growth, leading to greater damage caused by this species in field crops.

13

Sezonowa aktywność rozrodcza samic szynszyli na wybranych fermach

72%

Seremak B. , Sulik M.

|

tom 64

14

Genetyczny aspekt wysokiej plenności u owiec. Cz.II

58%

Smolucha G. , Piestrzynska-Kajtoch A. , Rejduch B.

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nr 2

15

Aktywnosc rozrodcza bydla miesnego. Aspekty fizjologiczne

58%

Dejneka G. J. , Twardon J. , Polanska J.

|

tom 03

|

nr 1

17-19

16

Baza pokarmowa, charakterystyka populacji i sezonowość rozrodu dzików (Sus scrofa) na terenach Gór Kaczawskich

58%

Zawadzki A. , Szuba-Trznadel A. , Fuchs B.

Zeszyty Naukowe Uniwersytetu Przyrodniczego we Wrocławiu. Biologia i Hodowla Zwierząt

|

2011

|

tom 63

17

Letnie upały a płodność loch

58%

Viebahn S.

|

tom [05] Monografia. Choroby świń i Bydła

18

Bydlo miesne: preferowane jest krycie naturalne

51%

Przysucha T. , Golebiewski M.

|

nr 09 Top Bydlo

30-33

19

Synchronizacja rui u loszek

44%

Pejsak Z.

|

nr 05 Top Świnie