Animal Science Cheat Sheet

The core ideas of Animal Science distilled into a single, scannable reference — perfect for review or quick lookup.

PiqCue — piqcue.com/animal-science/cheatsheet

Quick Reference

Animal Nutrition

The science of formulating diets that meet the specific energy, protein, mineral, and vitamin requirements of different animal species at various life stages and production levels. It includes understanding feed composition, digestive physiology, and nutrient metabolism.

Animal Genetics and Breeding

The application of genetic principles to improve desirable traits in animal populations through selective mating, genomic selection, and biotechnology. This includes estimating heritability, calculating expected progeny differences (EPDs), and using marker-assisted selection.

Reproductive Physiology

The study of the hormonal, cellular, and physiological processes that govern reproduction in animals, including estrous cycles, spermatogenesis, fertilization, pregnancy, and parturition. Assisted reproductive technologies such as artificial insemination and embryo transfer are key applications.

Animal Welfare

The ethical and scientific assessment of animal well-being based on criteria such as freedom from hunger, discomfort, pain, fear, and the ability to express normal behaviors. It encompasses housing design, handling practices, and regulatory standards.

Ruminant Digestion

The specialized digestive process in cattle, sheep, and goats involving a four-compartment stomach (rumen, reticulum, omasum, abomasum) where microbial fermentation breaks down cellulose and other fibrous plant materials into volatile fatty acids that serve as the primary energy source.

Monogastric Nutrition

The nutritional science specific to simple-stomached animals such as swine and poultry, focusing on amino acid balance, digestible energy, feed additives, and enzyme supplementation to maximize feed conversion efficiency.

Livestock Genomics

The application of whole-genome sequencing, SNP chip genotyping, and bioinformatics to identify genes and quantitative trait loci (QTL) associated with economically important traits such as growth rate, disease resistance, and meat quality.

Animal Behavior and Ethology

The scientific study of animal behavior patterns, including social hierarchies, feeding behavior, stress responses, and maternal instincts. Understanding natural behavior informs housing design, handling systems, and welfare assessment protocols.

Meat Science

The study of muscle biology, postmortem biochemistry, and processing methods that determine meat quality attributes including tenderness, color, flavor, juiciness, and shelf life. It encompasses grading systems, aging techniques, and food safety.

Precision Livestock Farming

The use of sensors, data analytics, automated monitoring, and decision-support systems to manage individual animals or groups in real time, improving efficiency, welfare, and environmental outcomes.

Key Terms at a Glance

Abomasum:The fourth and final compartment of the ruminant stomach, often called the 'true stomach,' where enzymatic and acid digestion occurs similar to the monogastric stomach.

Artificial Insemination:The process of depositing collected and processed semen into the female reproductive tract to achieve pregnancy without natural mating.

Body Condition Score:A numerical assessment of the fat and muscle covering of a live animal, used to evaluate nutritional status and predict reproductive performance.

Colostrum:The first secretion from the mammary gland after parturition, rich in immunoglobulins that provide passive immunity to the newborn.

Crossbreeding:The mating of animals from two or more different breeds to exploit heterosis and combine desirable traits from multiple breeds.

Crude Protein:A laboratory measure of feed protein content calculated by multiplying total nitrogen by 6.25.

Dry Matter:The portion of feed remaining after all water has been removed, used as the standard basis for expressing nutrient concentrations.

Embryo Transfer:A reproductive technology involving the collection of embryos from a donor female and their transfer to recipient females for gestation.

Estrous Cycle:The recurring hormonal cycle in sexually mature female mammals during which the animal becomes receptive to mating.

Expected Progeny Difference:A genetic prediction of how an animal's progeny will perform relative to the progeny of other animals for a given trait.

Feed Conversion Ratio:A measure of feed efficiency representing the amount of feed consumed per unit of weight gain or product output.

Forage:Plant material such as hay, silage, or pasture used as feed for livestock, typically high in fiber and digested through microbial fermentation.

Genomic Selection:A breeding approach using genome-wide DNA marker data to predict an animal's genetic merit with greater accuracy.

Gestation:The period of fetal development from conception to birth, varying in length by species.

Heritability:The proportion of phenotypic variation among individuals in a population that is attributable to additive genetic differences.

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