Zoology Archives - Page 8 of 29 - Biology Notes Online

Phylum Ctenophora – Characteristics, Classification, Examples, Evolutionary significance

• Published on October 2, 2024 • 24 min readby Editorial Team

What is Phylum Ctenophora? Kingdom Animalia Subkingdom Eumetazoa Phylum Ctenophora Phylum Ctenophora, commonly referred to as comb jellies, encompasses a group of marine invertebrates known for their distinctive, jelly-like appearance and unique locomotive mechanisms. These creatures, often mistaken for jellyfish, play a significant role in marine ecosystems across the globe. Below is an exploration of … Read more

Coral Reefs – Types, Structure, Habitat, Formation, Importance

• Published on October 2, 2024 • 32 min readby Sourav Pan

What are Coral Reefs? Structure of a coral polyp Coral polyps are fundamental building blocks of coral reefs, exhibiting a unique structure that facilitates their role in these vibrant ecosystems. Generally small, a typical coral polyp measures about 10 mm in length and 1 to 3 mm in diameter. Although some solitary polyps can reach … Read more

Metazoa – Characteristics, Symmetry, Metamerism, Origin and Evolution

• Published on October 2, 2024 • 41 min readby Sourav Pan

What is Metazoa? Characteristics of metazoa Metazoa, or multicellular animals, exhibit a range of distinctive characteristics that differentiate them from other life forms. Understanding these features provides insight into their complex biological organization and functional diversity. The following points outline the key characteristics of metazoans: Levels of body Organisation The levels of body organization in … Read more

Fish Aquarium – Components, Contents, Preparation and Maintenance

• Published on September 29, 2024 • 39 min readby Sourav Pan

What is an Aquarium? Types of Aquarium An aquarium can be categorized based on its purpose, size, and the type of aquatic life it contains. Below are the primary types of aquariums, explained in detail: Major Aquarium Accessories Aquarium accessories are essential to maintaining a balanced and healthy environment for aquatic life. These tools and … Read more

Hatchery Management of Major Cultivable Fin-Fishes

• Published on September 28, 2024 • 34 min readby Sourav Pan

What is Hatchery Management? Hatchery Management of Indian Major Carp Hatchery management plays a pivotal role in the aquaculture of Indian major carps (IMC), which are essential for food security and nutrition in India. This management process involves various systematic practices to ensure successful breeding, rearing, and incubation of carp species such as Catla (Catla … Read more

Broodstock Management – Definition, Objective, Procedure, Importance

• Published on September 28, 2024 • 21 min readby Sourav Pan

What is Broodstock Management? Objective of Broodstock Management Broodstock management is essential for optimizing fish breeding practices, particularly in aquaculture systems. The objectives of effective broodstock management encompass several key areas, all aimed at enhancing fish production and ensuring sustainability. The following points detail these objectives: Selection procedure of brood fish The selection procedure for … Read more

Composite Fish Culture – Definition, Steps, Advantages

• Published on September 28, 2024 • 15 min readby Sourav Pan

What is Composite Fish Culture? Steps in Composite Fish Culture 1. Site selection Site selection is a critical aspect of aquaculture that significantly influences the success of fish farming operations. Choosing an appropriate site requires a comprehensive evaluation of various factors that can affect fish health, growth, and overall productivity. The process can be categorized … Read more

Polyculture of Fishes – Definition, Objectives, Advantages

• Published on September 28, 2024 • 17 min readby Sourav Pan

What is Polyculture of Fishes? Indian Polyculture System In India, the polyculture system has evolved significantly over time, primarily focusing on the integration of various fish species to optimize production in aquaculture. Initially, this system prominently featured Indian major carps such as rohu (Labeo rohita), catla (Catla catla), and mrigal (Cirrhinus mrigala). Subsequently, the practice … Read more

Fishery By-products – Examples, Uses

• Published on September 28, 2024 • 30 min readby Sourav Pan

Fishery by-products refer to the various materials derived from fish processing that are not intended for direct human consumption but have significant value in various industries. These by-products include fish meal, fish oil, fish skin, bones, and other remnants that arise during the cleaning and filleting of fish. They play a crucial role in waste … Read more

Fish Preservation and Processing Methods and Steps

• Published on September 28, 2024 • 36 min readby Sourav Pan

Fish is a vital protein source that requires meticulous handling to maintain its quality and safety. This necessity arises from fish’s susceptibility to spoilage, particularly in warm tropical climates, where high temperatures expedite the activities of bacteria, enzymes, and the oxidation of fats. In regions such as Nigeria, inadequate handling has resulted in significant losses, … Read more