Colors of Insect Cuticular Outgrowths: The colors of cuticular outgrowths (such as hairs, bristles, spines, and scales) on insects are the result of both structural coloration and pigmentation. These features serve various roles, including camouflage, warning signals, mate attraction, and temperature regulation. Structural Coloration: Structural coloration arises from the microscopic structure of the cuticle, which…
The basement membrane is a thin, dense layer of extracellular matrix that lies between the epidermal cells and the underlying tissues of arachnids, as well as in other animals. It serves as a structural and functional interface that plays a critical role in supporting the epidermal layer and maintaining the integrity of the exoskeleton. Structure…
The cuticle and epidermal layer of arachnids play crucial roles in providing protection, support, and enabling interaction with the environment. Let’s explore the detailed structure of the cuticle, its biochemical properties, and the epidermal layer’s structure and function. 1. Cuticle Structure and Biochemistry: The cuticle is the outermost layer of an arachnid’s body, forming a…
Arachnids, like all arthropods, have a body structure characterized by a segmented body with a hard exoskeleton. They undergo a process called tagmatization, where their body segments are organized into distinct regions called tagmata. Here’s a breakdown of their anatomy in terms of hard parts, segmentation, tagmatosis, and organization: 1. Hard Parts (Exoskeleton) Exoskeleton Composition:…
Insects are the most diverse group of organisms on Earth, with millions of species adapted to virtually every terrestrial and aquatic habitat. The reasons for their success in diverse environments include: 1. Exoskeleton (Cuticle) Protection: Insects have a hard, chitinous exoskeleton that provides protection against physical damage, dehydration, and predators. Support and Versatility: The exoskeleton…
The classification of animal and poultry feeds is typically based on various factors such as the type of animal or poultry being fed, the nutritional content, and the purpose for which the feed is formulated. Below is a general classification of animal and poultry feeds: 1. Based on Animal Type • Cattle Feed: Feeds specifically…
Introduction Concentrates (also mixed feeds, compound feeds or concentrate mixtures) play an important role in modern dairy cattle feeding. Usually, as a basis of most dairy production systems, concentrates are used as a supplement to roughage. Although a specific ingredient can be called concentrate, practically it is a mixture of several ingredients mixed in a…
Introduction Various classification systems are employed to differentiate feedstuffs, each according to a certain purpose. Classification of feedstuffs divided by origin into three categories: 1. Plant origin Roughage and concentrates 2. Animal origin All products have a high energy content and often a high protein content They are considered concentrates, except for poultry manure, as…
Nutrient density (digestibility) and structure value of a food are both related with CF (cell- wall) content. The higher the cell-wall content, the lower the nutrient density and the higher the structure value of a food. Nutrient density of a food is defined as its energy content per kg DM. Digestibility of a food is…
The value of protein is usually expressed as crude protein (CP) or digestible crude protein (DCP). The DCP and/or CP values are indicated: Sometimes as %/gram CP/DCP per kg food on a wet/fresh basis, or sometimes as the same values on a DM basis! Care should be taken! In this paper calculations will…
