標題: Titlebook: Channel Catfish Farming Handbook; Craig S. Tucker,Edwin H. Robinson Book 1990 Springer Science+Business Media New York 1990 bacteria.biolo [打印本頁] 作者: notable 時間: 2025-3-21 18:24
書目名稱Channel Catfish Farming Handbook影響因子(影響力)
作者: BACLE 時間: 2025-3-21 23:28 作者: 友好 時間: 2025-3-22 01:26
Genetics the same spawn and reared in the same environment. In nature, genetic variation is important because it enables populations to adapt to changing environments and survive. Genetic variation is important in channel catfish farming because the heritable component of variation can be exploited through 作者: abnegate 時間: 2025-3-22 06:00
Environmental Requirementsm, the general well-being of the fish is affected. Fish respond to suboptimal conditions (stressors) by modifying metabolism or behavior in an attempt to adapt to the new conditions. Initial reactions (stress responses) include release of hormones that prepare the animal for emergency action by mobi作者: 有特色 時間: 2025-3-22 10:09 作者: abracadabra 時間: 2025-3-22 13:05
Breedingding programs based on genetic theory. Commercial channel catfish culture lags far behind most other farm animal culture in using genetic improvement programs to increase productivity, despite indications from research (summarized by Dunham and Smitherman 1987) that considerable progress can be made作者: abracadabra 時間: 2025-3-22 20:03 作者: ARC 時間: 2025-3-22 21:51 作者: 我要威脅 時間: 2025-3-23 03:19
Water Quality Management in Pondsish culture. Dissolved oxygen concentrations are near saturation, and the water contains negligible concentrations of carbon dioxide, ammonia, nitrite, or other toxic substances. When fish are stocked and fed, the environment immediately begins to deteriorate and becomes less fit for the fish. The d作者: Galactogogue 時間: 2025-3-23 07:31
Feeds and Feeding Practicesh is considered minuscule. The nutritional requirements of cultured catfish are met by using a feed that is formulated to provide all required nutrients (a complete feed) in the proper proportions necessary for rapid weight gain, high feed efficiency, and desirable composition of gain. Feed cost rep作者: 培養(yǎng) 時間: 2025-3-23 11:38
Infectious Diseasesoses related to suboptimal environmental conditions (Chapter 4). Infectious diseases are caused by living organisms that parasitize or infect fish. Infectious diseases of channel catfish are caused by viruses, bacteria, fungi, protozoans, and metazoans.作者: 教義 時間: 2025-3-23 15:07 作者: 間接 時間: 2025-3-23 20:27 作者: 多骨 時間: 2025-3-24 01:35
General Biologys book; however, a general description of the external and internal anatomy of the catfish is presented. For a more comprehensive treatment of the morphology of channel catfish, the reader is referred to the book . and . (Grizzle and Rogers 1976).作者: 無意 時間: 2025-3-24 03:10
Egg and Fry Production for space and nutrients of new recruits will reduce yield of marketable fish. Thus a reliable source of high-quality seed stock at an economical cost is essential to large-scale commercial fish culture.作者: osteoclasts 時間: 2025-3-24 10:20 作者: glacial 時間: 2025-3-24 11:11
Book 1990are those who contend that catfish farming is still as much of an "art" as it is a science. This position is difficult to refute completely, particularly considering that some practices used in catfish farming ap- pear to have little scientific basis. Skill coupled with a small dose of mysticism cer作者: Banister 時間: 2025-3-24 15:13 作者: Angiogenesis 時間: 2025-3-24 22:28
https://doi.org/10.1007/978-3-662-02048-7ronments and survive. Genetic variation is important in channel catfish farming because the heritable component of variation can be exploited through breeding programs to improve commercially important traits.作者: CAB 時間: 2025-3-25 00:07 作者: 極肥胖 時間: 2025-3-25 03:45
Geneticsronments and survive. Genetic variation is important in channel catfish farming because the heritable component of variation can be exploited through breeding programs to improve commercially important traits.作者: 軌道 時間: 2025-3-25 10:53 作者: Flatter 時間: 2025-3-25 13:11
https://doi.org/10.1007/978-3-662-02048-7 toxins or mold in the diet, expected level of performance, desired carcass composition, and environmental factors. In addition, the aquatic animal nutritionist is further constrained because fish live in an environment where dissolved substances, including excretory products, may affect nutrient requirements.作者: blight 時間: 2025-3-25 19:12
https://doi.org/10.1007/978-3-662-02048-7 to provide immediate increases in production. As the industry has matured and profit margins have decreased, the benefits of genetic improvement have become more obvious. Production efficiency cannot be optimized unless the biological potential of the fish is optimized.作者: 連詞 時間: 2025-3-25 23:34
Nutrition toxins or mold in the diet, expected level of performance, desired carcass composition, and environmental factors. In addition, the aquatic animal nutritionist is further constrained because fish live in an environment where dissolved substances, including excretory products, may affect nutrient requirements.作者: 愛好 時間: 2025-3-26 01:40 作者: Charitable 時間: 2025-3-26 05:46
https://doi.org/10.1007/978-3-662-02048-7is exceeded and some of the initial responses may actually have deleterious consequences. The ultimate results of severe or prolonged stress include reduced growth, impaired immunity to infectious disease organisms, poor reproductive success, or death (Pickering 1981).作者: Obligatory 時間: 2025-3-26 11:19
Environmental Requirementsis exceeded and some of the initial responses may actually have deleterious consequences. The ultimate results of severe or prolonged stress include reduced growth, impaired immunity to infectious disease organisms, poor reproductive success, or death (Pickering 1981).作者: incubus 時間: 2025-3-26 12:41
https://doi.org/10.1007/978-3-662-02048-7s book; however, a general description of the external and internal anatomy of the catfish is presented. For a more comprehensive treatment of the morphology of channel catfish, the reader is referred to the book . and . (Grizzle and Rogers 1976).作者: ADORE 時間: 2025-3-26 20:20
https://doi.org/10.1007/978-3-662-02048-7 for space and nutrients of new recruits will reduce yield of marketable fish. Thus a reliable source of high-quality seed stock at an economical cost is essential to large-scale commercial fish culture.作者: 粘連 時間: 2025-3-26 23:01 作者: Femish 時間: 2025-3-27 03:29 作者: GRILL 時間: 2025-3-27 08:13 作者: CLOWN 時間: 2025-3-27 12:38
Fingerling and Food-Fish Production in Ponds uneconomical if there is no market for the fish or if variable operating costs (particularly feed cost) are high. The proper industry infrastructure is necessary for profitable production of channel catfish.作者: 積習已深 時間: 2025-3-27 13:54
Feeds and Feeding Practices prudent catfish producer should select the appropriate feed for a specific culture system and use it in a manner to ensure efficient conversion of feed to fish flesh. The following sections on feeds and feeding practices, although based on the best available information, are intended only as guidel作者: 修改 時間: 2025-3-27 21:12
Alternative Culture Systemsomotional material concerning various systems for intensive culture of fish, be cautious, exercise common sense, and be aware that production data presented for a particular system are often extrapolated from small-scale production trials and do not necessarily reflect production in commercial-size 作者: Complement 時間: 2025-3-27 23:27 作者: SMART 時間: 2025-3-28 05:12
How to Describe a Pollen Grain, prudent catfish producer should select the appropriate feed for a specific culture system and use it in a manner to ensure efficient conversion of feed to fish flesh. The following sections on feeds and feeding practices, although based on the best available information, are intended only as guidel作者: Serenity 時間: 2025-3-28 08:57
https://doi.org/10.1007/978-3-211-79894-2omotional material concerning various systems for intensive culture of fish, be cautious, exercise common sense, and be aware that production data presented for a particular system are often extrapolated from small-scale production trials and do not necessarily reflect production in commercial-size 作者: 緊張過度 時間: 2025-3-28 11:34
https://doi.org/10.1007/978-3-662-02048-7Channel catfish were originally native to Mexico and states bordering the Gulf of Mexico as well as states within the Mississippi Valley. The species has been introduced throughout the United States and in many other countries during the past century; thus the channel catfish is widely distributed.作者: CLASP 時間: 2025-3-28 15:39
Life History and Reproductive BiologyChannel catfish were originally native to Mexico and states bordering the Gulf of Mexico as well as states within the Mississippi Valley. The species has been introduced throughout the United States and in many other countries during the past century; thus the channel catfish is widely distributed.作者: 懶惰人民 時間: 2025-3-28 22:13
http://image.papertrans.cn/c/image/223840.jpg作者: 情感 時間: 2025-3-28 23:52
https://doi.org/10.1007/978-3-662-02048-7largely due to recognition by consumers of the health benefits of low-fat protein sources. Increases in both per capita consumption and population have caused demand for fishery products to increase faster than production.作者: 盡忠 時間: 2025-3-29 03:06 作者: 正式通知 時間: 2025-3-29 07:53
https://doi.org/10.1007/978-3-662-02048-7 the same spawn and reared in the same environment. In nature, genetic variation is important because it enables populations to adapt to changing environments and survive. Genetic variation is important in channel catfish farming because the heritable component of variation can be exploited through 作者: 轉向 時間: 2025-3-29 11:44 作者: MUT 時間: 2025-3-29 17:54
https://doi.org/10.1007/978-3-662-02048-7rption, and transport of various nutrients to body cells where the elements of foods are transformed into body tissues and activities. Nutrition also encompasses the removal of excess nutrients and unused metabolites. Thus it is a complex biological science and, like other sciences that deal with a 作者: 得意人 時間: 2025-3-29 22:11 作者: FLING 時間: 2025-3-30 03:57
https://doi.org/10.1007/978-3-662-02048-7an be controlled or manipulated. These are desirable characteristics in a cultured fish because natural supplies of seed stock cannot be depended on since their availability and quality are inconsistent. Also, unwanted reproduction in food-fish production ponds is undesirable because the competition
