Reproduction

Effects of intermittent harem mating on parturition-induced stress and success rate of weaning in C57BL/6JNarl mice

Improving the effectiveness of mating schemes for large-scale production of mice is an ongoing challenge in animal facilities. Continuous mating, which requires fewer breeding cages than intermittent mating, has traditionally been used to take advantage of postpartum estrus for efficient...

Year Published: 2024Topics: Rearing & Weaning, ReproductionAnimal Type: Mouse, Rodent

Citation: Chang, T.-K., Wang, C.-H., Lin, T.-Y. et al. 2024. Effects of intermittent harem mating on parturition-induced stress and success rate of weaning in C57BL/6JNarl mice. JAALAS 63(5), 488–494.

Comparison of propofol and alfaxalone as anesthesic drugs in bitches undergoing ovariohysterectomies (healthy bitches and with pyometra) and cesarean sections

This study evaluated the efficacy and safety of two anesthetic agents, alfaxalone and propofol, on maternal physiological parameters (heart and respiratory rates, blood pressure, and temperature) on either ovariohysterectomies or cesarean sections in bitches. A total of 34 healthy and...

Year Published: 2024Topics: Anesthesia & Sedation, ReproductionAnimal Type: Dog

Citation: Rodríguez-Trujillo, R., Batista-Arteaga, M., Iusupova, K. et al. 2024. Comparison of propofol and alfaxalone as anesthesic drugs in bitches undergoing ovariohysterectomies (healthy bitches and with pyometra) and cesarean sections. Animals 14(9), 1343.

An overview of black tree monitor (Varanus beccarii) husbandry

This article describes the enclosure, environmental parameters, feeding, enclosure dynamics, breeding, handling, identification, and enrichment for zoo-housed black tree monitors.

Year Published: 2023Topics: Environmental Enrichment, Handling, Housing, Husbandry & Management, Identification Method, Reproduction, Social Housing & CompanionshipAnimal Type: Lizard, Reptile

Citation: Newton, R. 2023. An overview of black tree monitor (Varanus beccarii) husbandry. RATEL (Journal of the Association of British and Irish Wild Animal Keepers) 50(3-4), 24-25.

Effects of breeding configuration on maternal and weanling behavior in laboratory mice

Although numerous studies have evaluated the effect of housing density on the wellbeing of laboratory mice, little is known about the effect of breeding configuration on mouse behavior. The 8th edition of the Guide for the Care and Use of...

Year Published: 2017Topics: ReproductionAnimal Type: Mouse, Rodent

Citation: Braden, G. C., Rasmussen, S., Monette, S. et al. 2017. Effects of breeding configuration on maternal and weanling behavior in laboratory mice. JAALAS 56(4), 369-376.

Effects of housing density on reproductive performance, intracage ammonia, and welfare of mice continuously housed as breeders in standard mouse and rat caging

Maintaining compliance with cage density recommendations in The Guide for the Care and Use of Laboratory Animals precludes continuous trio breeding in standard-sized mouse cages. This study evaluated and compared several parameters of reproductive performance, intracage ammonia concentration, and fecal...

Year Published: 2023Topics: Husbandry & Management, Reproduction, Stocking DensityAnimal Type: Mouse, Rodent

Citation: Cho, E., Walsh, C. A., D'Angelo-Gavrish, N. M. et al. 2023. Effects of housing density on reproductive performance, intracage ammonia, and welfare of mice continuously housed as breeders in standard mouse and rat caging. JAALAS 62(2), 116–122.

The effect of noise, vibration, and light disturbances from daily health checks on breeding performance, nest building, and corticosterone in mice

At our institution, the techniques that technicians use for health checks vary for mice housed in cages on individually ventilated caging (IVC) racks. If the mice cannot be adequately visualized, some technicians partially undock the cage whereas others use an...

Year Published: 2023Topics: Emotion, Pain, & Sentience, Husbandry & Management, ReproductionAnimal Type: Mouse, Rodent

Citation: Clancy, B. M., Theriault, B. R., Turcios, R. et al. 2023. The effect of noise, vibration, and light disturbances from daily health checks on breeding performance, nest building, and corticosterone in mice. JAALAS 62(4), 291–302.

Effects of isoflurane anesthesia on C57BL/6J pups after cervical dislocation of dams

Inhalant anesthesia is routinely used for cesarian section in many animal species, allowing the safe delivery of neonates and smooth recovery of dams. However, in mice, inhalant anesthesia in cesarean section may be avoided due to fear of negative health...

Year Published: 2023Topics: ReproductionAnimal Type: Mouse, Rodent

Citation: Hunter, C. L., Yang, P., Renner, D. M. et al. 2023. Effects of isoflurane anesthesia on C57BL/6J pups after cervical dislocation of dams. JAALAS 62(5), 449–452.

Perinatal environmental enrichment changes anxiety-like behaviours in mice and produces similar intergenerational benefits in offspring

Environmental enrichment implemented in early life is able to induce long-term changes in gene expression, synaptic function and behavioural responses. In this study, we evaluated the adult behavioural effects of perinatal environment enrichment in male and female mice (PEE), as...

Year Published: 2024Topics: Emotion, Pain, & Sentience, Environmental Enrichment, Rearing & Weaning, ReproductionAnimal Type: Mouse, Rodent

Citation: Silva-Almeida, C., Muniz, S. C. A., Jobim, C. M. N. et al. 2024. Perinatal environmental enrichment changes anxiety-like behaviours in mice and produces similar intergenerational benefits in offspring. Behavioural Brain Research 456, 114700.

Group size planning for breedings of gene-modified mice and other organisms following Mendelian inheritance

Colony management of gene-modified animals is time-consuming, costly and affected by random events related to Mendelian genetics, fertility and litter size. Careful planning is mandatory to ensure successful outcomes using the least number of animals, hence adhering to the 3R...

Year Published: 2023Topics: ReproductionAnimal Type: Mouse, Rodent

Citation: Milchevskaya, V., Bugnon, P., ten Buren, E. B. J. et al. 2023. Group size planning for breedings of gene-modified mice and other organisms following Mendelian inheritance. Lab Animal 52(8), 183–188.

Physiological and behavioral effects of hormonal contraceptive treatment in captive, pair-bonded primates (Plecturocebus cupreus)

Hormonal contraception is an effective, reversible tool for managing birth rates in humans and nonhuman animals alike. However, manipulating reproductive hormones has behavioral consequences that can impact social and sexual behavior between conspecifics. First, we studied 18 pairs of nonreproductive...

Year Published: 2023Topics: ReproductionAnimal Type: Nonhuman Primate, Other Nonhuman Primate

Citation: Karaskiewicz, C. L., Ramirez, M., Bales, K. L. 2023. Physiological and behavioral effects of hormonal contraceptive treatment in captive, pair-bonded primates (Plecturocebus cupreus). JAALAS 62(6), 494–501.