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1
題名:Suitability of Minimum Legal Fishing Size of Lobsters in Taiwan    
臺灣龍蝦法定最小捕捉體型的適合性
著者:Koa-Jen Jong(鐘國仁)
出版地區:台灣
出版城市:基隆市
學科:農林漁牧礦科學
關鍵字:龍蝦 ; 法定最小捕撈體型 ; Spiny Lobster ; Minimum Legal Fishing Size
刊名:Journal of the Fisheries Society of Taiwan
卷期:27卷1期(2000.3)
頁碼:1-6
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

親水性產氣單胞菌(Aeromanas hydrophila)及愛德華氏菌(Edwardsiella tarda)為鰻魚最主要之病原菌。目前在養殖界控制病原菌的方式仍以施用抗生素等藥劑為主,然而在細菌抗藥性不斷增強下,發展另類拮抗物質有其必要性。在自然界中,噬菌體是造成細菌死亡的重要因子,本研究的目的在於了解噬菌體於自然水相中溶裂宿主菌的能力,提供實際應用參考。以A.hydrophila ATCC 7966、E.tarda CCRC 10670及來自病鰻所分離之E.tarda為宿主,自南台灣水域中分離出五株強溶裂型噬菌體,分別定名為A1、A2、E1、E2及T1。經初步鑑定,A2、E1、E2遺傳物質皆為雙股DNA且可以被限制酶EcoRⅠ切割。在實驗室中觀察顯示,25℃下,在感染倍數(multiplicity of infection,moi)約等於11.5以上時,可在2小時內使菌數降低3次方。在養殖池水中,額外添加A.hydrophila至每毫升6×10^(5)菌數,在噬菌體A1的感染倍數為0.23時,在8小時內卽將菌數降低250倍,同時產生高量的噬菌體。殘存的寄主大部分(85%)還是對病毒敏感。其餘在15%則具有抵抗性,其原因可能係為溶素原(lysogen)。而E.tarda並不能在水體長存。在沒有添加噬菌體的情況下,卽使額外添加菌數至每毫升4次方,終究會在48小時內菌數降低為原菌數之千分之一。
Modulatory role of thermopulse(12hrs)of 30℃ given either in the morning(0600 h)orevening(1800 h)on Mystus gonadotropin(mGtH,25 μg/fish/0.2 ml saline)action on thegonadal recrudescence in the female catfish,Clarias batrachus was studied in the latepostspawning phase of its annual reproductive cycle.Results indicated that two weekstreatment with mGtH to the fish held at constant high temperature(maintained eitherunder long photoperiod or natural photoperiod)stimulated the gonadal activity during thelate postspawning phase.On the other hand Mystus gonadotropin administered 8hrs afterthe onset of morning thermopulse,induced stimulation in the studied reproductive parametersequally as compared to that at constant high temperature,but more than thatobserved when injection was given either 1 or 4 or 12 hrs of morning thermopulse.However,administration of mGtH at different intervals of evening thermopulse failed toelicit any change in the gonadal activity.A temporal variation in ovarian responses to exogenous hormones is demonstratedand thermopriming of 8 hrs duration,before exogenous administration of gonadotropinduring the late postspawning phase can be more productive and cost effective in pisciculturepropagation.




本卷期目次
Journal of the Fisheries Society of Taiwan 27卷1期 (2000.3)
Suitability of Minimum Legal Fishing Size of Lobsters in Taiwan/ Koa-Jen Jong
Modulatory Role of Temperature on Mystus Gonadotropin Action on Gonadal Recrudescence in the Indian Female Catfish,Clarias Batrachus/ Kaberi AchariaBechan LalThakur Prasad Singh
Control of the Eel(Anguilla Japonica)Pathogens,Aeromonas Hydrophila and Edwardsiella Tarda,by Bacteriophages/ Chi-Hsin HsuChong-Yi LoJong-Kang LiuChan-Shing Lin
Astaxanthin Distribution in Juvenile Penaeus Monodon at Various Molting Stages/ Chih-Hung PanYew-Hu Chien
Analysis of the Price Response of Taiwan Tuna Purse Seine Fishery in the Frozen Tuna Raw Material Market in Thailand/ Chin-Hwa SunMing-Chia Hsieh
Application of 2-Phenoxyethanol in Live Transportation of Sea Bass,Lates Calcarifer/ Jinn-Rong HseuYeong-Torng ChuShinn-Lih YehYun-Yuan Ting
Habitat Use Model by Terapon Jarbua/ Shyi-Liang Yu
 
   
 
   

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