Fishes, the most numerous vertebrates on Earth, exhibit incredible diversity across various groups such as Agnatha, Chondrichthyes, and Osteichthyes. From jawless Agnatha like lampreys to bony Osteichthyes including lobe-finned and ray-finned species, fishes display unique characteristics and adapta

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Dr. Mohammad Hamed Bahnasawy, a Professor of fish biology, discusses the positive aspects like diversity and importance of fishes, alongside the negative aspects such as poisonous and venomous fishes, highlighting toxins present in different fish species and risks associated with consumption.

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Bacterial toxins are poisonous substances produced by microbes that can cause harm to host cells through direct damage, toxin production, and hypersensitivity reactions. Toxigenesis is a crucial mechanism used by bacterial pathogens to induce disease, with endotoxins and exotoxins playing distinct r

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Illegally obtained evidence refers to evidence acquired through unlawful means, such as searches without warrants or extraction under duress. The Fruit of the Poisonous Tree doctrine renders evidence inadmissible if derived from illegally obtained evidence. The Exclusionary Rule prohibits the use of

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The presentation discusses the alimentary canal and feeding adaptations in fishes, covering topics like the different regions of the gut, mouth types in fish, adaptation of teeth for specific diets, and the roles of the buccal cavity, pharynx, and gill rakers. It further explores how gill rakers var

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Mushrooms, consumed as energy-rich food, come in various types like poisonous and common edible mushrooms. Poisonous mushrooms contain toxins that can be harmful, while edible mushrooms offer a variety of nutritious options. Learn about the features and symptoms associated with poisonous mushrooms a

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Lymphoid organs play a crucial role in the defense mechanisms of finfish and shellfish by generating immune cells. Different types of fish vary in their lymphoid organ structures, with jawless fish relying on lymphoid tissue within other organs for immune cell production. Cyclostomes, like hagfish a

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Parental care in fishes is an instinctive behavior that ensures offspring survival and reproductive success. It can be provided by males, females, or both parents, with different types of care strategies such as maternal care, biparental care, and various methods of protecting eggs and young. The co

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The lateral line system in fishes is a crucial sensory organ that helps in adjusting to water conditions. It comprises the lateral line canal and neuromast organs, providing sensitivity to water currents and pressure. Specializations in different fish groups like sharks and teleosts showcase variati

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The brain in vertebrates varies in size and complexity, with distinct structures like the prosencephalon and mesencephalon. From cartilaginous fishes with large olfactory lobes to bony fishes with specialized brains, the evolution of brain structures can be observed. Amphibians, like frogs, show uni

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The short poem by Robert Frost delves into the profound healing power of nature and tiny entities. It highlights how nature can cure anything from a bad mood to ill-health. The poet's encounter with a crow near a hemlock tree, where snow was dusted upon him, instantly changes his mood, making his da

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Freshwater fishes are a valuable food source in tropical regions. With high protein content, essential nutrients, and great taste, popular varieties like Labeo Rohita, Catla Catla, and Cirrhinus Mrigala offer a delicious and nutritious culinary experience. Learn about their characteristics, breeding

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Composite fish farming is a popular aquaculture technique where different compatible fish species are cultured together in ponds to maximize fish production. Researchers from India and abroad have contributed significantly to this field. The practice involves combining Indian major carps like Catla,

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Fish diseases and health are essential aspects of aquatic life. Diseases can be infectious or non-infectious, causing impairments to the normal state of fishes. Recognizing symptoms and signs of diseases is crucial for diagnosis and treatment. Overall, maintaining the health of fishes is vital for t

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Dive into the breathtaking world of Hakaluki Haor with this educational presentation. Learn about the unique biodiversity, economic significance, and ecological importance of this wetland in Bangladesh. Discover the different kinds of fishes and birds that call Hakaluki Haor their home, and expand y

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Protect, restore, and sustain the diversity of the nearshore fish community, emphasizing self-sustaining native fishes such as Walleye, Yellow Perch, Lake Sturgeon, Smallmouth Bass, Largemouth Bass, sunfish, Northern Pike, Muskellunge, Round Whitefish, and American Eel. Goals include maintaining hea

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The Carolina Wolf Spider, known for its gray and brown body with dark stripes, resides in South America in various habitats like woodlands and coastal forests. It feeds on insects like fruit flies and ants and defends itself via non-poisonous venom bites. Interestingly, this spider doesn't weave web

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Poisonous plants can have deleterious effects on individuals, leading to severe consequences and even death if not managed properly. These plants produce toxins that interfere with the body's essential functions, ultimately causing impairment and potential fatality. Recognizing the grades of poisoni

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Explore conceptual frameworks and models for developing indicator lists in the coastal estuary habitats of Washington, focusing on key components like intertidal zones, shorebirds, fishes, and more. Dive into the connections within food webs, physical drivers, climate change impacts, and weather ele

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The presentation provides detailed information on the Apiaceae (Umbelliferae) family, its characteristics, distribution, and significance. Dr. R. P. Patil from Deogiri College, Aurangabad, presents insights into the diverse features of this plant family, including its unique inflorescence, flower st

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Detailed overview of the Veterinary Toxicology syllabus including general toxicology, toxicity caused by metals and non-metals, poisonous plants, agrochemical toxicity, fungal and bacterial toxins, venomous bites and stings, and more. The syllabus covers a wide range of topics related to toxicology

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Exploring the intricate mechanisms of fish physiology, particularly focusing on the autonomic nervous system's role in controlling internal organ functions and maintaining homeostasis. Additionally, delving into how fishes manage thermal regulation and optimize body temperature for growth, feeding,

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Professor Ole Kristian Berg from the Department of Biology at NTNU has made significant contributions to the fields of fish ecology and aquaculture. His research focuses on topics such as biotic interactions, competitive asymmetries, conservation biology, lipid stores in fish, and the effects of hyd

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Glycosides, ethers with a carbohydrate and non-carbohydrate moiety, are key toxicants in poisonous plants. Cyanogenic glycosides yield hydrocyanic acid, goitrogenic glycosides inhibit thyroid hormone production, while coumarin glycosides can lead to vitamin K deficiency. Steroid and triterpenoid gly

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Reef fisheries play a significant role in global fishery landings, supporting millions of people. However, the exploitation of valuable species that aggregate to spawn can lead to overfishing due to inadequate management, conservation, and monitoring. The decline of aggregating fishes in regions lik

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This detailed chapter delves into the classification, identification, and chemical constituents of poisonous plants, shedding light on natural toxins, alkaloids, and toxic principles. It covers the role of alkaloids in plant toxicity, highlighting specific types such as piperidine alkaloids, pyrroli

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Toxicology is the study of the adverse effects of chemicals on living organisms, involving xenobiotics and poisonous substances. Toxicologists examine the nature of these effects, testing in lab animals for measures of toxicity such as mortality, teratogenicity, carcinogenicity, and mutagenicity. Ke

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Fish migration involves the movement of large numbers of fish for various reasons such as feeding, reproduction, and avoiding harsh weather conditions. Shoaling and schooling behaviors are observed in migrating fishes, with different types of migration including latitudinal, oceanodromous, potamodro

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Explore the factors influencing plant nutritive value, such as cell structure, lignification, and anti-quality factors. Learn about the impact of toxic plants on livestock, including death, birth defects, and neurological effects. Discover the types and characteristics of toxic or poisonous plants c

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