A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of water hyacinth, Eichhornia crassipes (Mart.) Solms
Neochetina eichhorniae has a meroistic reproductive system composed of a pair of ovaries each subdivided into two tube-like ovarioles. The ovarioles consist of two main regions, the distal germarium and the proximal vitellarium. The vitellarium houses the developing follicles, which mature sequentia...
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| Veröffentlicht in: | Biological control 1997-06, Vol.9 (2) |
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| creator | Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.) Center, T.D Freedman, J.E |
| description | Neochetina eichhorniae has a meroistic reproductive system composed of a pair of ovaries each subdivided into two tube-like ovarioles. The ovarioles consist of two main regions, the distal germarium and the proximal vitellarium. The vitellarium houses the developing follicles, which mature sequentially. The two ovarioles in each pair connect proximally via the lateral oviducts. The paired ovaries join one another via the common oviduct. Ovarian development involves two distinct phases: a nulliparous (meaning "no eggs") phase and a parous (meaning "with eggs") phase. Each phase undergoes three sequential stages, named N1, N2, and N3 and P1, P2, and P3 for the nulliparous and parous categories, respectively. The degree of maturity of the proximate follicles and the extent of follicular differentiation distinguish the nulliparous stages. The quantity and quality of follicular relics (and, by association, the number of egg ovulations) distinguishes the parous phases. The overall condition of the ovaries can be characterized from the number of developing follicles in the ovarioles as well as the integrity of the follicular cellular material. Samples from field populations in Texas revealed distinct seasonal changes in physiological age structure and condition of the reproductive system. This physiological age-grading system can be an important tool for assessing age structure and relative reproductive health of N. eichhorniae populations or other weed biological control agents with similar reproductive systems |
| doi_str_mv | 10.1006/bcon.1997.0525 |
| format | Article |
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Solms</title><source>Elsevier ScienceDirect Journals Complete</source><creator>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.) ; Center, T.D ; Freedman, J.E</creator><creatorcontrib>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.) ; Center, T.D ; Freedman, J.E</creatorcontrib><description>Neochetina eichhorniae has a meroistic reproductive system composed of a pair of ovaries each subdivided into two tube-like ovarioles. The ovarioles consist of two main regions, the distal germarium and the proximal vitellarium. The vitellarium houses the developing follicles, which mature sequentially. The two ovarioles in each pair connect proximally via the lateral oviducts. The paired ovaries join one another via the common oviduct. Ovarian development involves two distinct phases: a nulliparous (meaning "no eggs") phase and a parous (meaning "with eggs") phase. Each phase undergoes three sequential stages, named N1, N2, and N3 and P1, P2, and P3 for the nulliparous and parous categories, respectively. The degree of maturity of the proximate follicles and the extent of follicular differentiation distinguish the nulliparous stages. The quantity and quality of follicular relics (and, by association, the number of egg ovulations) distinguishes the parous phases. The overall condition of the ovaries can be characterized from the number of developing follicles in the ovarioles as well as the integrity of the follicular cellular material. Samples from field populations in Texas revealed distinct seasonal changes in physiological age structure and condition of the reproductive system. This physiological age-grading system can be an important tool for assessing age structure and relative reproductive health of N. eichhorniae populations or other weed biological control agents with similar reproductive systems</description><identifier>ISSN: 1049-9644</identifier><identifier>EISSN: 1090-2112</identifier><identifier>DOI: 10.1006/bcon.1997.0525</identifier><language>eng</language><subject>AGE ; AGE DETERMINATION ; AGE STRUCTURE ; AQUATIC WEEDS ; BIOLOGICAL CONTROL ; CONTROL BIOLOGICO ; DESHERBAGE ; DETERMINACION DE LA EDAD ; DETERMINATION DE L'AGE ; EDAD ; EICHHORNIA CRASSIPES ; ESCARDA ; ESTRUCTURA POR EDADES ; FOLICULOS OVARICOS ; FOLLICLES ; FOLLICULE OVARIEN ; LUTTE BIOLOGIQUE ; MALEZAS ACUATICAS ; MAUVAISE HERBE AQUATIQUE ; MORPHOLOGY ; NEOCHETINA EICHHORNIAE ; OVAIRE ; OVARIAN DEVELOPMENT ; OVARIAN FOLLICLES ; OVARIES ; OVARIOLES ; OVARIOS ; REPARTITION DES AGES ; SEASONAL VARIATION ; TEXAS ; VARIACION ESTACIONAL ; VARIATION SAISONNIERE ; WEED CONTROL</subject><ispartof>Biological control, 1997-06, Vol.9 (2)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.)</creatorcontrib><creatorcontrib>Center, T.D</creatorcontrib><creatorcontrib>Freedman, J.E</creatorcontrib><title>A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of water hyacinth, Eichhornia crassipes (Mart.) Solms</title><title>Biological control</title><description>Neochetina eichhorniae has a meroistic reproductive system composed of a pair of ovaries each subdivided into two tube-like ovarioles. The ovarioles consist of two main regions, the distal germarium and the proximal vitellarium. The vitellarium houses the developing follicles, which mature sequentially. The two ovarioles in each pair connect proximally via the lateral oviducts. The paired ovaries join one another via the common oviduct. Ovarian development involves two distinct phases: a nulliparous (meaning "no eggs") phase and a parous (meaning "with eggs") phase. Each phase undergoes three sequential stages, named N1, N2, and N3 and P1, P2, and P3 for the nulliparous and parous categories, respectively. The degree of maturity of the proximate follicles and the extent of follicular differentiation distinguish the nulliparous stages. The quantity and quality of follicular relics (and, by association, the number of egg ovulations) distinguishes the parous phases. The overall condition of the ovaries can be characterized from the number of developing follicles in the ovarioles as well as the integrity of the follicular cellular material. Samples from field populations in Texas revealed distinct seasonal changes in physiological age structure and condition of the reproductive system. This physiological age-grading system can be an important tool for assessing age structure and relative reproductive health of N. eichhorniae populations or other weed biological control agents with similar reproductive systems</description><subject>AGE</subject><subject>AGE DETERMINATION</subject><subject>AGE STRUCTURE</subject><subject>AQUATIC WEEDS</subject><subject>BIOLOGICAL CONTROL</subject><subject>CONTROL BIOLOGICO</subject><subject>DESHERBAGE</subject><subject>DETERMINACION DE LA EDAD</subject><subject>DETERMINATION DE L'AGE</subject><subject>EDAD</subject><subject>EICHHORNIA CRASSIPES</subject><subject>ESCARDA</subject><subject>ESTRUCTURA POR EDADES</subject><subject>FOLICULOS OVARICOS</subject><subject>FOLLICLES</subject><subject>FOLLICULE OVARIEN</subject><subject>LUTTE BIOLOGIQUE</subject><subject>MALEZAS ACUATICAS</subject><subject>MAUVAISE HERBE AQUATIQUE</subject><subject>MORPHOLOGY</subject><subject>NEOCHETINA EICHHORNIAE</subject><subject>OVAIRE</subject><subject>OVARIAN DEVELOPMENT</subject><subject>OVARIAN FOLLICLES</subject><subject>OVARIES</subject><subject>OVARIOLES</subject><subject>OVARIOS</subject><subject>REPARTITION DES AGES</subject><subject>SEASONAL VARIATION</subject><subject>TEXAS</subject><subject>VARIACION ESTACIONAL</subject><subject>VARIATION SAISONNIERE</subject><subject>WEED CONTROL</subject><issn>1049-9644</issn><issn>1090-2112</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNpFkE9Lw0AUxIMoWKtXb8I7ttDUt5tsk3iTUP9A1UMtHsvLZjdZSbNlN0X6vfyApip6mrnMb4YJgkuGU4Y4uy6kbacsy5IpCi6OggHDDEPOGD8--DgLs1kcnwZn3r8jMhYnOAg-b2Fb772xja2MpAaoUmHlqDRtBX7vO7UBbR08Kytr1ZmWQBlZ19a1hhSM3si1yo1hlNtG2W2nHN1AvnNy1xjbmpLUeAIExX9Bv7Jz9ruo7cBq-KA-BfWepGm7egLzPz5IR96brfIweiLXTcewtM3GnwcnmhqvLn51GKzu5q_5Q7h4uX_MbxehZonoQipxxlGKkosoJUlCoohjlUQyzRC1EFJxxqlArSIsVKp5GkVcI6VF0QN0NAyufria7JoqZ_x6tTw8jD0wmUVfo3xybQ</recordid><startdate>19970601</startdate><enddate>19970601</enddate><creator>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.)</creator><creator>Center, T.D</creator><creator>Freedman, J.E</creator><scope>FBQ</scope></search><sort><creationdate>19970601</creationdate><title>A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of water hyacinth, Eichhornia crassipes (Mart.) Solms</title><author>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.) ; Center, T.D ; Freedman, J.E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-f175t-ad0620c5d2538aca5c0544e73c8900f55ce212ab0fe30be8f28332f0a8bb175f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>AGE</topic><topic>AGE DETERMINATION</topic><topic>AGE STRUCTURE</topic><topic>AQUATIC WEEDS</topic><topic>BIOLOGICAL CONTROL</topic><topic>CONTROL BIOLOGICO</topic><topic>DESHERBAGE</topic><topic>DETERMINACION DE LA EDAD</topic><topic>DETERMINATION DE L'AGE</topic><topic>EDAD</topic><topic>EICHHORNIA CRASSIPES</topic><topic>ESCARDA</topic><topic>ESTRUCTURA POR EDADES</topic><topic>FOLICULOS OVARICOS</topic><topic>FOLLICLES</topic><topic>FOLLICULE OVARIEN</topic><topic>LUTTE BIOLOGIQUE</topic><topic>MALEZAS ACUATICAS</topic><topic>MAUVAISE HERBE AQUATIQUE</topic><topic>MORPHOLOGY</topic><topic>NEOCHETINA EICHHORNIAE</topic><topic>OVAIRE</topic><topic>OVARIAN DEVELOPMENT</topic><topic>OVARIAN FOLLICLES</topic><topic>OVARIES</topic><topic>OVARIOLES</topic><topic>OVARIOS</topic><topic>REPARTITION DES AGES</topic><topic>SEASONAL VARIATION</topic><topic>TEXAS</topic><topic>VARIACION ESTACIONAL</topic><topic>VARIATION SAISONNIERE</topic><topic>WEED CONTROL</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.)</creatorcontrib><creatorcontrib>Center, T.D</creatorcontrib><creatorcontrib>Freedman, J.E</creatorcontrib><collection>AGRIS</collection><jtitle>Biological control</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Grodowitz, M.J. (USAE Waterways Experiment Station, Vicksburg, MS.)</au><au>Center, T.D</au><au>Freedman, J.E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of water hyacinth, Eichhornia crassipes (Mart.) Solms</atitle><jtitle>Biological control</jtitle><date>1997-06-01</date><risdate>1997</risdate><volume>9</volume><issue>2</issue><issn>1049-9644</issn><eissn>1090-2112</eissn><abstract>Neochetina eichhorniae has a meroistic reproductive system composed of a pair of ovaries each subdivided into two tube-like ovarioles. The ovarioles consist of two main regions, the distal germarium and the proximal vitellarium. The vitellarium houses the developing follicles, which mature sequentially. The two ovarioles in each pair connect proximally via the lateral oviducts. The paired ovaries join one another via the common oviduct. Ovarian development involves two distinct phases: a nulliparous (meaning "no eggs") phase and a parous (meaning "with eggs") phase. Each phase undergoes three sequential stages, named N1, N2, and N3 and P1, P2, and P3 for the nulliparous and parous categories, respectively. The degree of maturity of the proximate follicles and the extent of follicular differentiation distinguish the nulliparous stages. The quantity and quality of follicular relics (and, by association, the number of egg ovulations) distinguishes the parous phases. The overall condition of the ovaries can be characterized from the number of developing follicles in the ovarioles as well as the integrity of the follicular cellular material. Samples from field populations in Texas revealed distinct seasonal changes in physiological age structure and condition of the reproductive system. This physiological age-grading system can be an important tool for assessing age structure and relative reproductive health of N. eichhorniae populations or other weed biological control agents with similar reproductive systems</abstract><doi>10.1006/bcon.1997.0525</doi></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | AGE AGE DETERMINATION AGE STRUCTURE AQUATIC WEEDS BIOLOGICAL CONTROL CONTROL BIOLOGICO DESHERBAGE DETERMINACION DE LA EDAD DETERMINATION DE L'AGE EDAD EICHHORNIA CRASSIPES ESCARDA ESTRUCTURA POR EDADES FOLICULOS OVARICOS FOLLICLES FOLLICULE OVARIEN LUTTE BIOLOGIQUE MALEZAS ACUATICAS MAUVAISE HERBE AQUATIQUE MORPHOLOGY NEOCHETINA EICHHORNIAE OVAIRE OVARIAN DEVELOPMENT OVARIAN FOLLICLES OVARIES OVARIOLES OVARIOS REPARTITION DES AGES SEASONAL VARIATION TEXAS VARIACION ESTACIONAL VARIATION SAISONNIERE WEED CONTROL |
| title | A physiological age-grading system for Neochetina eichhorniae (Warner) (Coleoptera: Curculionidae), a biological control agent of water hyacinth, Eichhornia crassipes (Mart.) Solms |
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