Browsing by Subject "ESPERMATOZOIDES"
Now showing items 1-7 of 7
-
La activación de espermas en camarones peneidos como una técnica para determinar la calidad reproductiva de padrotes
(Universidad Nacional (Costa Rica), 2002)Se estudió la influencia del agua de huevo (AH) y choque hipoosmótico sobre la activación de espermas en camarones marinos del Golfo de Nicoya. El mayor porcentaje de espermas activados por el agua de huevo fue 29,67% y ... -
Assessment of sperm morphology in Zebu bulls, under field conditions in the tropics
(Blackwell, 2001)Sperm morphology was studied in 302 extensively managed Zebu bulls (aged 1.5-9 years), classified as sound (n = 166) or unsound (n = 136) for breeding, under field conditions in the dry tropics of Costa Rica. Single semen ... -
Breeding soundness evaluation of extensively managed bulls in Costa Rica
(Elsevier, 1999-02-17)This paper describes the results of single breeding soundness evaluations (BSE) in 898 Bos indicus, Bos taurus and B. indicus x B. taurus bulls, 1 to 12 yr. old, extensively reared in different climatic regions of Costa ... -
Deferred bulls: are cycles per conception and pregnancy rate determined by the type of spermiogramme deviation under natural mating?
(Elsevier, 2016)Deferred bulls undergo clinical deviations that could be transitory or have an uncertain potential fertility output. Data in Costa Rica showed no significant differences in conception rate (CR) between sound vs. deferred ... -
Induction of sperm activation in open and closed thelycum penaeoid shrimps
(Aquaculture vol.216 no.1-4 371-381 2003, 2003)A modified egg water (EW) technique for in vitro induction of sperm activation was applied to Trachypenaeus byrdi, Xiphopenaeus riveti (closed thelycum shrimps), and Litopenaeus occidentalis (open thelycum) from a tropical ... -
Seasonal variations in testicular consistency, scrotal circumference and spermiogramme parameters of extensively reared Brahman (Bos indicus) bulls in the tropics
(Elsevier, 2002-07)Twenty-five extensively bred mature Brahman (Bos indicus) breeding bulls were clinically examined and electroejaculated at monthly intervals for 13 months to study whether testicular consistency (TC), scrotal circumference ... -
Tail stump sperm defect as a cause of sterility in an indobrasil (Bus indicus) bull
(Blackwell Wissenschafts-Verlag, Berlin, 1998)The first known case of an Indobrasil (BOA indicus) bull, with a frequency of 100% of the specific sperm abnormality, known as ‘tail stump sperm defect’ is reported. A 5-year old bull was located as a breeding sire in ...