March 2024

Intra-specific relationships refer to interactions that occur within a single species. These relationships are essential components of ecosystems and play a significant role in shaping population dynamics, behavior, and community structure. Here’s how intra-specific relationships manifest among fishes, bacteria, viruses, plants, and other animals: 1. Other Fish (Intra-specific): Social Hierarchies: Within fish species, individuals often…

Biotic inter-relationships among fishes refer to the various interactions that occur between different fish species within aquatic ecosystems. These interactions can be diverse and encompass a range of behaviors and relationships. Here are some examples: 1. Feeding Relationships: Competition: Competition occurs when different fish species compete for limited resources such as food, shelter, or mates….

Thermodynamics is the branch of science that deals with the transfer of energy, particularly heat, and its conversion into various forms. In the context of thermodynamics, there are several key concepts related to energy: Primary and Secondary Production: Primary Production: Primary production refers to the process by which green plants (autotrophic organisms) and certain types…

Aquaculture in fresh and brackish waters plays a significant role in global food production, providing a sustainable source of fish, crustaceans, and other aquatic organisms. Each environment has its unique characteristics, challenges, and suitable species. Here’s a detailed look at both: 1/ Freshwater Aquaculture: Freshwater aquaculture involves the cultivation of aquatic species in bodies of…

These are different concepts related to the definition and understanding of species in the field of biology and taxonomy. Let me explain each concept briefly: Criticism: This concept doesn’t account for natural variation within a species. Individuals can exhibit differences in size, color, or other traits without belonging to a different species. Criticism: This concept…

Microtaxonomy, phenon, taxon, taxonomic categories, infraspecific category, higher categories, and species concept are key concepts in taxonomy, which is the science of classifying and naming living organisms. Let’s explore these concepts: Species: A fundamental unit of classification, typically defined as a group of organisms that can interbreed and produce fertile offspring. Genus: A group of closely related…

The study of systematics has undergone significant changes over time, greatly influenced by the work of Charles Darwin and modern developments in genetics and molecular biology. Here’s a look at the impact of Darwin’s “On the Origin of Species,” the field of population systematics, and the current trends in systematics. 1. Impact of “On the…

Downward and upward classification is two approaches used in biological taxonomy to organize living organisms into hierarchical categories. These methods help scientists understand the relationships between organisms and how they fit into the broader classification system. 1. Downward Classification (Deductive Approach) • In this method, classification starts from a general category and moves downward to…

Taxonomy is the science of classifying, naming, and organizing living organisms into groups based on their similarities, differences, and evolutionary relationships. It provides a standardized system that helps scientists understand and communicate about the diversity of life on Earth. The goal of taxonomy is to organize species in a way that reflects their evolutionary history,…

The underwater world is a buffet for fish, with a diverse range of food options depending on the species, habitat, and even the life stage of the fish. Studying the food and feeding habits of fish is a fascinating field within fisheries biology, offering valuable insights into fish ecology, conservation, and even aquaculture practices. The…

The Aquatic Dance: Water Movement and Fish Locomotion: Impact on Fish: Factors Affecting Movement:

Composition: Bottom deposits consist of various materials that settle on the seabed, including: Sediment: Sand, silt, and clay particles. Detritus: Decomposing organic matter from plants and animals. Chemical Precipitates: Minerals that settle out of the water column. Significance for Fish: The type and amount of bottom deposits can influence fish in several ways: Feeding: Many fish species, particularly bottom feeders, rely…