BREEDING SYSYTEM OF ORNAMENTAL FISH KEEPING 00607KD
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This document discusses the classification and breeding behaviors of ornamental fishes. It divides them into two main categories: egg layers and live bearers. Egg layers spawn externally by laying eggs that are then fertilized, while live bearers undergo internal fertilization and give birth to live young. Within egg layers, there are further classifications like mouth brooders, nest builders, and egg scatterers depending on how eggs are laid and cared for. Examples are provided for common fish that fall under each category and classification.
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This document summarizes the key characteristics of 5 organisms: tilapia, milkfish, clam, crab, and snail. It describes how each organism obtains food, reproduces, its body plan, and stages of development. Tilapia and milkfish feed on plankton and aquatic plants/invertebrates. Clams and snails are filter feeders. Crabs are omnivorous. Reproduction involves external or internal fertilization and larval stages for most. The body plans include shells, claws, tails and other distinguishing structures. Development proceeds through embryonic, larval and juvenile stages to sexual maturity.
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This presentation summarizes breeding activities at the UVAS fish hatchery during an internship. It discusses pond management including draining, drying, fertilizing and conditioning ponds. It then describes the functions of the UVAS fish hatchery, which has circular and rectangular tanks. The presentation covers the induced breeding technique used, including selecting brooders, injecting them with hormones, and stripping eggs and milt. Finally, it provides details on breeding trials conducted with silver carp, thala, rohu, and grass carp, and examining developmental stages of the eggs under a microscope.
Reproductive biology
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1. It describes the distribution, reproductive biology, breeding season, and sexual dimorphism of giant gourami.
2. Male giant gourami build nests to spawn with females, guarding the fertilized eggs for around two weeks.
3. Breeding can be induced in ponds by adding nest frames and materials, with males building nests that can then be harvested for eggs.
Presentation on Parental care in Amphibians
This document summarizes various forms of parental care exhibited by amphibians. It describes how amphibians select sites for egg-laying, form foam, mud, leaf, and shoot nests, carry eggs on their bodies, use organs as brooding pouches, coil around eggs, and transfer tadpoles to water. Some amphibians exhibit viviparity where young are born live rather than from eggs. The document concludes that parental care in amphibians likely evolved in response to their habitats and lifestyles, and may be instinctive rather than influenced by hormones.
animalsclassification-131104115006-phpapp01 (1).pdf
This document classifies animals according to their structure, diet, and reproduction. It divides animals into invertebrates and vertebrates. Invertebrates do not have backbones and include arthropods, mollusks, worms and sponges. Vertebrates do have backbones and are divided into mammals, birds, fish, reptiles and amphibians. Mammals bear live young, are warm-blooded and nurse their young with milk. Birds lay eggs and have feathers and wings. Fish lay many small eggs in water and some sea mammals like whales are viviparous. Reptiles are generally egg-laying but some are viviparous while amphibians lay
Murrels
the presentation provides the details regarding the murrels or snakeheads which includes the basic taxonomy, some of the important species, distribution, special characters, its aquaculture potential, food and feeding habits, sexual dimorphism, parental care, age at maturity, the maturity stages, breeding season, courtship and mating, natural spawning, fecundity, induced spawning using ovaprim and HCG and LHRHa, and also the detailed facts regarding larval reariing.
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Syllabus
Chapter-1
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Chapter 2
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Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
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Chapter 6
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2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
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BREEDING SYSYTEM OF ORNAMENTAL FISH KEEPING 00607KD
- 3. FACTORS AFFECTING BREEDING Proper substrate Cover Temperature pH Live foods Lighting Number of fish
- 4. CLASSIFICATION OF ORNAMENTAL FISHES On the basis of their breeding behavior. Egg layers (oviparous) Live bearers(ovo- viviparous)
- 5. EGG LAYERS
- 6. EGG LAYERS Breeding in egg layers. Egg layers spawn by several means. Breeding by external fertilization. Separate male & female hormone produce in fish. The egg are laid fertilize out side the fish body. Important group of egg layers are Barbs,Rasboras,Danios,Betas,Anglefish & Gouramis.
- 7. CLASSIFICATION OF EGG LAYERS Based on the type of incubation egg laying fishes are further classified as. Mouth brooders Egg scatterers Egg buriers Egg depositors Nest builders
- 8. MOUTH BROODERS Fertilized by spawning before gathered in mouth. Eggs are laid in water ,then collected in mouth once fertilized. Held in mouth until birth. E.g. Bettas Cichlid Cardinal fish
- 9. EGG DEPOSITORS Sticky eggs are laid in one spot usually on the bottom substrate or on aquarium glass. Male swim by & fertilized egg. Some depositors guard their eggs & fry. E.g. Clown fish Rainbow fish Barb
- 10. EGG BURIERS Female dives in soft substrate to lay eggs. Eggs are buried in the substrate. Male dives into substrate to fertilized eggs. E.g. Killifishes
- 11. NEST BUILDERS Nest made of plant material or bubble(foam) in substrate. Fishes lay eggs by spawning. The nest is generally build by males. E.g. Siamese fighter Blue gourami Angel fish
- 12. EGG SCATTERERS Fertilized by spawning. Fishes lay sticky & non-sticky egg. Sticky eggs are laid within a certain area under cover & non-sticky eggs are laid in open water. E.g. Tiger barb Goldfish Zebra danios
- 13. LIVE BEARERS
- 14. LIVE BEARERS Breeding in live bearers. Fish produce by bearing live young or by laying eggs. Breeding by internal fertilization. The eggs are fertilized & hatched within the female. They produce only a few numbers of offspring in comparison to egg layers. The common live bearers are Guppy , Black molly, Sword tail & Platy.
- 15. LIVE BEARERS Platy Molly Black molly Guppy Sword tail