PPT-The positive and negative aspects of fishes

Prof Dr Mohammad Hamed Bahnasawy   Prof of fish biology Zoology Department Faculty of Science Damietta University The negative aspects 1 Poisonous and venomous fishes. 1 Positive Negative Actual Positive A: True Positive Negative Negative C: False Positive D: True Negative BAA Accuracy (AC):: is the proportion of the total number ofpredictions that wer Invertebrate chordates. Tunicates and lancelets. Vertebrate chordates. Fishes. Amphibians. Reptiles. Birds. Mammals. Nonvertebrate Chordates . Tunicates (sea squirts). Squirt water when their siphons are disturbed. By Kendall and Mitchell. What an introvert is:. An introvert is someone who loses energy in social interactions, and feels re-energized while in solitude. Their social circles are condensed. They’re content with having a fewer amount of friends. . Notothenioid. Fishes. by: Priscilla Watson-Wynn. Antarctica. Fifth largest continent. The world’s most southern continent. Surrounded by Southern Ocean. 98% covered in ice sheet & 2% barren rock. The . Protochordates. as Ancestors. Some living chordate groups may resemble the primitive vertebrate ancestors (. protochordates. ). Hemichordates. Burrows in marine sediments (acorn worms). (+) pharyngeal gill slits; . Cold Connection Project . # . 1 . Positive/Negative. Space: . positive . and negative. . . Positive . spaces are those occupied by the main subjects of the . work. . Negative . spaces are the areas around and behind the positive spaces. . The . Protochordates. as Ancestors. Some living chordate groups may resemble the primitive vertebrate ancestors (. protochordates. ). Hemichordates. Burrows in marine sediments (acorn worms). (+) pharyngeal gill slits; . Positive incentives reward people for making certain choices or behaving in a certain way. . What are some examples of positive incentives?. -. Free time. Positive Incentives make us feel happy.. -Higher pay. This makes my head hurt.... N. egative Rights. negative rights. permit or oblige inaction – especially from government (legal) but they may be moral - . either permitting one to act or refrain from acting. Where does it start?. Part 1. Phylum Chordata. Animal Kingdom. Vertebrates over here. Chordata (animals with notochord at some stage in life cycle). Craniata (euchordates with a cranium) = Vertebrata. Origin. Position. Anatomy. Ovaries. Testes. Testes in different groups. Structure of ovary. Structure of testes. Cyclic changes in gonads. Intermittent organs. Reproductive strategies. Acknowledgements . coloured. . . Colouration. is one of the most common phenomena found among the fishes.. The enormous range of . colours. and patterns that produced in fishes are generally related to their habits.. Dr. S.P. Sahu. Assistant Professor (LPM. ). Bihar Veterinary College, Patna. Fish Seed Collection. Classification of Indian major carps based on size only:. Spawn/hatchling : upto 8 mm. Early fry : 8-25 mm. Gram Positive. Gram Negative. Gram-Positive bacteria. Gram-Negative bacteria. Cell Wall. A single-layered, smooth cell wall.  A double-layered, wavy cell-wall. Cell Wall thickness. The thickness of the cell wall is 20 to 80 .