Cephalization, sclerites, and their modifications are important aspects of the anatomy and evolution of arthropods, including arachnids and insects. These features play crucial roles in body organization, protection, and the specialized functions of various body parts. 1. Cephalization: Cephalization refers to the evolutionary trend in which sensory organs, nerve cells, and the brain become concentrated…
From a nutritional point of view, the lactation cycle is divided into 3 periods: 1 Dry period 2 Early lactation 3 Mid- and late lactation. With a calving interval of about one year, the first 3 months after calving the cow is not pregnant and has a “peak” production. Then, after 90 days, she should…
Generally, the pre-weaning period is the most critical time of an animals’ life, usually expensive due to the high costs of milk and high quality concentrates. Calves require a lot of attention during this period. After weaning, rearing gets less critical, but calves should to no account be neglected. To allow animals to produce to…
Introduction; The impression might be given that feeding should be adjusted according to daily requirements for maintenance and production . However, a cow does not divide nutrients on daily basis for maintenance and production as used in the ration formulation. Her production is much more a reflection of the overall feeding management during her whole…
The required nutrients must be available in the quantity of DM an animal is able to consume within 24 hours. If not, a ration is not considered balanced. In practice, the maximum DMI from roughage is not more than 2% of the body-weight. .Minimum Roughage Intake To avoid disturbances in functioning of the rumen, metabolic…
The purpose of ration formulation is to provide an animal of nutrients for maintenance and (desired) production. A balanced ration formulates proportions and quantities of nutrients to properly nourish an animal for 24 hours. The economic context is an extra dimension. Decision making is necessary to aim for maximum economic benefit, maximum physical production, or…
Introduction It is difficult to compare different animals, and animals of different ages, with each other with regard to feeding and grazing. To make comparison possible, different types of livestock are converted to the same unit. The feed intake capacity (DMI) depends on live weight, production level and quality of feed. The quantity is expressed…
Nutritional needs vary depending on the needs of the animal for health and the life stages of maintenance, conception and gestation, lactation, and growth and de- development. When a female is in the gestational period, for example, nutritional needs are different than during lactation. Figure 3.1 demonstrates how the nutrient re- requirements of a mature…
1. Digestive System Mouth and Pharynx: Food is ingested through the mouth and passes through the pharynx. Midgut: The primary site of digestion and nutrient absorption. Many arachnids rely on external digestion, where enzymes are secreted onto prey to liquefy it before ingestion. Hindgut: Responsible for the absorption of remaining nutrients and the excretion of…
The anatomy of arachnids is fascinating, characterized by a range of adaptations that have enabled them to thrive in diverse environments. Below, you’ll find a detailed overview of both the external and internal anatomy of arachnids. External Anatomy of Arachnida 1. Body Structure Segmentation: Prosoma (Cephalothorax): The anterior part, which combines the head and thorax….
