Zoology

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

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 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 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

Fish diseases encompass a broad spectrum of health issues that can significantly impact the well-being, growth, and survival of various fish species. These diseases can arise from multiple types of pathogens, including bacteria, viruses, fungi, and parasites, as well as environmental stressors. Bacterial diseases, caused by organisms such as Aeromonas, Vibrio, and Edwardsiella, often manifest … Read more

Key Takeaways Pond Aquaculture Types of ponds and their aquacrops The cultivation of aquatic crops in various types of ponds is primarily determined by the salinity of the water, which influences the selection of species that can thrive in these environments. Understanding the different types of ponds and the specific aquacrops associated with each is … Read more

What is Aquaculture? Definition of Aquaculture Aquaculture is the farming of aquatic organisms, such as fish, shellfish, and aquatic plants, under controlled conditions to increase production for food, industry, and environmental restoration. Characteristics of Aquaculture Aquaculture is a highly productive practice with diverse benefits for agriculture, the environment, and the economy. Below are its key … Read more

Classification of Fish Based on the Habitat and Skeletal System The classification of fish is primarily based on two factors: the type of skeletal system and their habitat. This categorization facilitates a deeper understanding of their biological and ecological adaptations. Structure of the Fish Skeleton System The composition of the fish skeleton system is intricate … Read more

What is Swim bladder? Development of Swim-Bladder The development of the swim bladder in fish is a complex process that varies among different groups, particularly in teleosts and certain primitive forms. This internal organ plays a crucial role in buoyancy regulation and has evolutionary significance, linking it to the lungs of tetrapods. The development process … Read more

The respiratory system of fishes is a highly specialized and efficient mechanism that allows them to extract oxygen from water. As aquatic organisms, fish must adapt to the lower oxygen content in water compared to air, and their respiratory systems have evolved to maximize the efficiency of gas exchange. Below is an overview of the … Read more