{"title":"昆虫生长调节剂中毒期间河口对虾幼体生长和代谢的变化","authors":"Charles L. McKenney Jr , David M. Celestial","doi":"10.1016/0742-8413(93)90201-U","DOIUrl":null,"url":null,"abstract":"<div><p>1. Exposure of the estuarine shrimp, <em>Palaemonetes pugio</em>, to a juvenile hormone analogue (⩾8 <em>μ</em>g methoprene 1<sup>−1</sup>) throughout larval development inhibited successful completion of metamorphosis.</p><p>2. Methoprene exposure retarded growth in early larval stages and postlarvae, but enhanced growth in premetamorphic larvae.</p><p>3. Respiration rates of early larvae were elevated by methoprene exposure, but not so older larvae or post larvae.</p><p>4. Lower net growth efficiency (<em>K</em><sub>2</sub> values) in methoprene-exposed early larvae suggests that increased metabolic demands reduced assimilated energy available for growth.</p><p>5. Modifications in O:N ratios of premetamorphic larvae and postlarvae suggest that methoprene altered substrate utilization patterns during metamorphosis.</p></div>","PeriodicalId":72650,"journal":{"name":"Comparative biochemistry and physiology. C: Comparative pharmacology","volume":"105 2","pages":"Pages 239-245"},"PeriodicalIF":0.0000,"publicationDate":"1993-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0742-8413(93)90201-U","citationCount":"25","resultStr":"{\"title\":\"Variations in larval growth and metabolism of an estuarine shrimp Palaemonetes pugio during toxicosis by an insect growth regulator\",\"authors\":\"Charles L. McKenney Jr , David M. Celestial\",\"doi\":\"10.1016/0742-8413(93)90201-U\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>1. Exposure of the estuarine shrimp, <em>Palaemonetes pugio</em>, to a juvenile hormone analogue (⩾8 <em>μ</em>g methoprene 1<sup>−1</sup>) throughout larval development inhibited successful completion of metamorphosis.</p><p>2. Methoprene exposure retarded growth in early larval stages and postlarvae, but enhanced growth in premetamorphic larvae.</p><p>3. Respiration rates of early larvae were elevated by methoprene exposure, but not so older larvae or post larvae.</p><p>4. Lower net growth efficiency (<em>K</em><sub>2</sub> values) in methoprene-exposed early larvae suggests that increased metabolic demands reduced assimilated energy available for growth.</p><p>5. Modifications in O:N ratios of premetamorphic larvae and postlarvae suggest that methoprene altered substrate utilization patterns during metamorphosis.</p></div>\",\"PeriodicalId\":72650,\"journal\":{\"name\":\"Comparative biochemistry and physiology. C: Comparative pharmacology\",\"volume\":\"105 2\",\"pages\":\"Pages 239-245\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1993-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0742-8413(93)90201-U\",\"citationCount\":\"25\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Comparative biochemistry and physiology. C: Comparative pharmacology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/074284139390201U\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Comparative biochemistry and physiology. C: Comparative pharmacology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/074284139390201U","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Variations in larval growth and metabolism of an estuarine shrimp Palaemonetes pugio during toxicosis by an insect growth regulator
1. Exposure of the estuarine shrimp, Palaemonetes pugio, to a juvenile hormone analogue (⩾8 μg methoprene 1−1) throughout larval development inhibited successful completion of metamorphosis.
2. Methoprene exposure retarded growth in early larval stages and postlarvae, but enhanced growth in premetamorphic larvae.
3. Respiration rates of early larvae were elevated by methoprene exposure, but not so older larvae or post larvae.
4. Lower net growth efficiency (K2 values) in methoprene-exposed early larvae suggests that increased metabolic demands reduced assimilated energy available for growth.
5. Modifications in O:N ratios of premetamorphic larvae and postlarvae suggest that methoprene altered substrate utilization patterns during metamorphosis.
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