Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico.
The oocyte structure of jumbo squid (Dosidicus gigas) female gonads was analyzed to validate morphochromatic sexual maturation stages based on a six-phase scale. Samples were obtained fortnightly from the Santa Rosalía area, Baja California Sur, from June 2001 to November 2002. Histological prepara...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2006-02-01
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| Series: | Ciencias Marinas |
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| Online Access: | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/68 |
| _version_ | 1827330463436374016 |
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| author | JG Díaz-Uribe A Hernández-Herrera E Morales-Bojórquez S Martínez-Aguilar MC Suárez-Higuera A Hernández-López |
| author_facet | JG Díaz-Uribe A Hernández-Herrera E Morales-Bojórquez S Martínez-Aguilar MC Suárez-Higuera A Hernández-López |
| author_sort | JG Díaz-Uribe |
| collection | DOAJ |
| description |
The oocyte structure of jumbo squid (Dosidicus gigas) female gonads was analyzed to validate morphochromatic sexual maturation stages based on a six-phase scale. Samples were obtained fortnightly from the Santa Rosalía area, Baja California Sur, from June 2001 to November 2002. Histological preparations were obtained from each gonad to count the number of oocytes at each level of development. The frequency of oocytes at each level was then used to estimate a maturity index (MI) to assess the correspondence between morphochromatic maturation stages and the oocyte structure in the gonad tissue. The histological analysis showed that morphochromatic stages I, II and III were ruled by oocytes in developmental level 2 or less (i.e., secondary growth has not yet begun), and thus correspond to sexually immature juveniles. Stages IV, V and VI were ruled by oocytes in more advanced developmental levels and correspond to mature or maturing adults. According to the analysis of variance, the morphochromatic maturity scale allowed sexually immature individuals to be readily and reliably distinguished from mature ones. A detailed analysis of MI confidence intervals showed that each morphochromatic maturity stage had a specific oocyte structure, except for stages II and III, which presented morphological differences.
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| first_indexed | 2024-03-07T16:11:26Z |
| format | Article |
| id | doaj.art-cc530aa6ac834e6d838d7ffb65c32111 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:11:26Z |
| publishDate | 2006-02-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-cc530aa6ac834e6d838d7ffb65c321112024-03-04T16:46:10ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532006-02-0132110.7773/cm.v32i1.68Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico.JG Díaz-Uribe0A Hernández-Herrera1E Morales-Bojórquez2S Martínez-Aguilar3MC Suárez-Higuera4A Hernández-López5Instituto Nacional de la PescaInstituto Politécnico NacionalInstituto Nacional de la PescaInstituto Nacional de la PescaInstituto Nacional de la PescaInstituto Politécnico Nacional The oocyte structure of jumbo squid (Dosidicus gigas) female gonads was analyzed to validate morphochromatic sexual maturation stages based on a six-phase scale. Samples were obtained fortnightly from the Santa Rosalía area, Baja California Sur, from June 2001 to November 2002. Histological preparations were obtained from each gonad to count the number of oocytes at each level of development. The frequency of oocytes at each level was then used to estimate a maturity index (MI) to assess the correspondence between morphochromatic maturation stages and the oocyte structure in the gonad tissue. The histological analysis showed that morphochromatic stages I, II and III were ruled by oocytes in developmental level 2 or less (i.e., secondary growth has not yet begun), and thus correspond to sexually immature juveniles. Stages IV, V and VI were ruled by oocytes in more advanced developmental levels and correspond to mature or maturing adults. According to the analysis of variance, the morphochromatic maturity scale allowed sexually immature individuals to be readily and reliably distinguished from mature ones. A detailed analysis of MI confidence intervals showed that each morphochromatic maturity stage had a specific oocyte structure, except for stages II and III, which presented morphological differences. http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/68Dosidicus gigasjumbo squidgonad maturationmaturity indexGulf of California |
| spellingShingle | JG Díaz-Uribe A Hernández-Herrera E Morales-Bojórquez S Martínez-Aguilar MC Suárez-Higuera A Hernández-López Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. Ciencias Marinas Dosidicus gigas jumbo squid gonad maturation maturity index Gulf of California |
| title | Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. |
| title_full | Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. |
| title_fullStr | Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. |
| title_full_unstemmed | Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. |
| title_short | Histological validation of the gonadal maturation stages of female jumbo squid (Dosidicus gigas) in the Gulf of California, Mexico. |
| title_sort | histological validation of the gonadal maturation stages of female jumbo squid dosidicus gigas in the gulf of california mexico |
| topic | Dosidicus gigas jumbo squid gonad maturation maturity index Gulf of California |
| url | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/68 |
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