ZOO BIOLOGY

Advancing the science behind animal program sustainability: An overview of the special issue.

Uncovering challenges to sustainability of AZA Animal Programs by evaluating the outcomes of breeding and transfer recommendations with PMCTrack.

Improving the sustainability of ex situ populations with mate choice.

Seasonal variations in serum concentrations of testosterone, testicular volume and neck circumference of fallow deer (Dama dama) kept ex situ in a tropical region.

Protein electrophoresis in Andean condors (Vultur gryphus): Reference values and differences between wild and rehabilitating individuals.

Flight patterns in zoo-housed fruit bats (Pteropus spp.).

Reproductive Viability Analysis (RVA) as a new tool for ex situ population management.

Analyses of African elephant (Loxodonta africana) diet with various browse and pellet inclusion levels.

Sleep-related behaviors in zoo-housed giraffes (Giraffa camelopardalis reticulata): Basic characteristics and effects of season and parturition.

Training penguins to interact with enrichment devices for lasting effects.

Prolonged ovarian acyclicity is associated with a higher likelihood of developing hyperprolactinemia in zoo female African elephants.

Is there any more room on the Ark? An analysis of space allocation in four mammalian taxa.

Reproductive behavior of the captive Sunda pangolin (Manis javanica Desmarest, 1822).

Effect of paternal age on the birth sex ratio in captive populations of aye-aye (Daubentonia madagascariensis (Gmelin)).

Evaluation of management in North American zoos to enhance breeding success of the fishing cat (Prionailurus viverrinus) ex situ population.

Influencing factors on the foot health of captive Asian elephants (Elephas maximus) in European zoos.

Endoparasites observed within invertebrates used as live food items for captive wild birds: Overview and potential risks.

Copper isotopes as possible neoplasia biomarkers in captive wild felids.

Social interaction analysis in captive orcas (Orcinus orca).

Time from injection of luteinizing hormone-releasing hormone analog affects sperm quality in the critically endangered Mississippi gopher frog (Lithobates sevosus).

Assessment of hematologic and corticosterone response in free-living eastern box turtles (Terrapene carolina carolina) at capture and after handling.

Fat mass compared to four body condition scoring systems in the Asian elephant (Elephas maximus).

Preliminary observations of an unusual mouth interaction between beluga calves (Delphinapterus leucas).

Weigh and see-Body mass recordings versus body condition scoring in European zoo elephants (Loxodonta africana and Elephas maximus).

Guiding the prioritization of the most endangered and evolutionary distinct birds for new zoo conservation programs.

Patterns in the long-term viability of North American zoo populations.

Assessment of contrafreeloading preferences in giraffe (Giraffa camelopardalis).

Foraging enrichment alleviates oral repetitive behaviors in captive red-tailed black cockatoos (Calyptorhynchus banksii).

A retrospective study of mortality in Eurasian lynx (Lynx lynx) in UK zoos

Use of passive radio frequency identification technologies to monitor nest usage in the northern carmine bee-eater (Merops n. nubicus).

Including the genetic values of the possible parents when analyzing pedigrees that contain MULT groups.

Challenges and solutions: An analysis of community-reported needs of AZA collaboratively managed animal populations.

Macronutrient composition of longitudinal milk samples from captive aardvarks (Orycteropus afer).

Growth and development of the Mahogany Glider (Petaurus gracilis).

Serum prolactin and testosterone levels in captive and wild brown kiwi (Apteryx mantelli) during the prebreeding, breeding, and incubation periods.

Sustainability Index (S-Index): A tool for use in the evaluation and planning of institutional animal collections.

Pregnancies following long luteal phases in southern white rhinoceros (Ceratotherium simum simum)

Assessing possible hybridization among managed Nubian ibex in North America.

Successful breeding attempt of a pair of Philippine tarsier (Tarsius syrichta) in a conservation center in Bilar, Bohol, Philippines and recommendations for tarsier husbandry.

Captive parturition and neonatal growth of the dwarf ornate wobbegong (Orectolobus ornatus de Vis, 1883).

Patterns of animal-enrichment interaction in captive brown bears.

Growth rates of juvenile Boa constrictor under two feeding regimes.

Husbandry, morbidity, and mortality of slender-tailed cloud rats (Phleomys pallidus).

A comparison of understanding of the amphibian crisis by zoo visitors across three countries.

Evaluating changes in salivary oxytocin and cortisol following positive reinforcement training in two adult male western lowland gorillas (Gorilla gorilla gorilla).

The addition of soil and chitin into Sunda pangolin (Manis javanica) diets affect digestibility, faecal scoring, mean retention time and body weight.

The Andean bear alopecia syndrome may be caused by social housing.