Superovulation in wood bison (Bison bison athabascae): Effects of progesterone, treatment protocol and gonadotropin preparations for the induction of ovulation

Palomino, J. M.; Cervantes, Miguel; McCorkell, Robert; Mapletoft, R.J.; Adams, Gregg P.

doi:10.1016/j.anireprosci.2016.02.001

Cited by 7 publications

(6 citation statements)

References 49 publications

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“…However, the low number of embryos collected non‐surgically from superovulated bison remains a significant problem to resolve. Previous experiments described low embryo retrieval issues not only in wood bison (Palomino et al, ), but also in buffalo (Baruselli et al, ; Carvalho et al, ). Additionally, high variation in superovulatory response among bison may also contribute to this outcome (Palomino et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Previous experiments described low embryo retrieval issues not only in wood bison (Palomino et al, ), but also in buffalo (Baruselli et al, ; Carvalho et al, ). Additionally, high variation in superovulatory response among bison may also contribute to this outcome (Palomino et al, ). All in all, 15 embryos collected from 40 bison donors in this study seems suboptimal compared to the proportion of embryos (49 transferable embryos/40 donors) produced in vitro.…”

Section: Discussionmentioning

confidence: 99%

“…In the 2× FSH group ( n = 10), 200 mg of FSH was given i.m. on Day 0 (the day after follicular ablation) and on Day 2, followed by 3,000 IU (Palomino et al, ) of hCG i.m. (Chorulon, Merck Animal Health, Kirkland, Quebec, Canada) on Day 5.…”

Section: Methodsmentioning

confidence: 99%

“…For both groups, the FSH (400 mg, Folltropin‐V, Vetoquinol NA Inc.) was diluted in 10 ml of 0.5% hyaluronan (5 mg/ml, MAP 5, Vetoquinol NA Inc.). The bison were inseminated with frozen wood bison semen (0.5 cc straw, 100 × 10 6 sperm/ml) 12 and 24 hr after hCG treatment (Adams, Yang, Palomino, & Anzar, ; Palomino et al, ). Ova/embryos were collected non‐surgically 8 days after hCG treatment and evaluated according to the International Embryo Technology Society guidelines (Stringfellow & Givens, ).…”

Section: Methodsmentioning

confidence: 99%

“…Assisted reproductive techniques commonly involve controlled ovarian superstimulation to induce multiple large follicle development for transvaginal oocyte collection and subsequent in vitro fertilization, or multiple ovulation for the purpose of in vivo fertilization and subsequent embryo collection. Results of previous studies have shown that two doses of FSH given at an interval of 48 hr induced a greater ovarian superstimulatory response than a single dose and that administration of hCG was more effective than LH for inducing multiple ovulation in superstimulated wood bison (Palomino, Cervantes, McCorkell, Mapletoft, & Adams, ). In a recent study testing the effectiveness of an extended FSH treatment protocol, no differences were found between 2 versus 3 treatments of FSH given at 48‐hr intervals during the anovulatory season, but during the ovulatory season, embryo collection efficiency was greater in the extended treatment group resulting in a greater number of transferable embryos (Palomino, Cervantes, Mapletoft, Woodbury, & Adams, ).…”

Section: Introductionmentioning

confidence: 99%

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Effect of season and superstimulatory treatment on in vivo and in vitro embryo production in wood bison (Bison bison athabascae)

Palomino

Mastromonaco

Cervantes

et al. 2019

Reprod Domestic Animals

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Two experiments were done using a two-by-two design to determine the effects of season and superstimulatory protocol on embryo production in wood bison. In Experiment 1 (in vivo-derived embryos), ovarian superstimulation was induced in female bison during the ovulatory and anovulatory seasons with either two or three doses of FSH given every-other-day (FSH × 2 vs. FSH × 3, respectively). Bison were given hCG to induce ovulation, inseminated 12 and 24 hr after hCG, and embryos were collected 8 days after hCG (n = 10 bison/group). In Experiment 2 (in vitro embryo production), ovarian superstimulation was induced in female bison during the ovulatory and anovulatory seasons with two doses of FSH, and in vivo maturation of the cumulus-oocyte complexes (COC) was induced with hCG at either 48 or 72 hr after the last dose of FSH. COC were collected 34 hr after hCG, and expanded COC were used for in vitro fertilization and culture. In Experiment 1, the number of follicles ≥9 mm, the proportion of follicles that ovulated, the number of CL, and the total number of ova/embryos collected did not differ between seasons or treatment groups, but the number of transferable embryos was greater (p < .05) in the ovulatory season. In Experiment 2, no differences were detected between seasons or treatment groups for any end point. The number of transferable embryos produced per bison was greatest (p < .05) using in vitro fertilization and was unaffected by season (1.5 ± 0.2 and 1.1 ± 0.3 during anovulatory and ovulatory seasons, respectively), in contrast to in vivo embryo production which was affected by season (0.1 ± 0.01 and 0.7 ± 0.2 during anovulatory and ovulatory seasons, respectively). Results demonstrate that transferable embryos can be produced throughout the year in wood bison by both in vivo and in vitro techniques, but the efficiency of embryo production of in vivo-derived embryos is significantly lower during the anovulatory season. K E Y W O R D S FSH, in vitro embryo, in vivo embryo, season, wood bison | 55 PALOMINO et AL. How to cite this article: Palomino JM, Mastromonaco GF, Cervantes MP, Mapletoft RJ, Anzar M, Adams GP. Effect of season and superstimulatory treatment on in vivo and in vitro embryo production in wood bison (Bison bison athabascae).

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Section: Discussionmentioning

confidence: 99%