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      VARIACIONES DEL FUNCIONAMIENTO TESTICULAR Octopus mimus ADULTOS Translated title: TESTICULAR FUNCTION VARIATIONS IN ADULT Octopus mimus

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          Abstract

          Octopus mimus macho madura precozmente. En general, sobre 200 g son maduros y permanecen en dicha condición hasta la muerte. En consideración a que no hay antecedentes de la fisiología testicular de los machos adultos, fueron estudiadas la función gamética mediante análisis histológico de los túbulos seminíferos y la función endocrina, cuantificando en el testículo, progesterona y testosterona, en conjunto con el crecimiento y funcionalidad de los órganos blancos del andrógeno. Se detectaron tres categorías de machos adultos: maduros jóvenes, de madurez máxima y en regresión. Los animales en regresión producen menor cantidad de ambas hormonas y muestran regresión de la función espermatogénica. La declinación de ambas funciones del testículo indica el estado de envejecimiento de Octopus mimus. Por el contrario, los que están en máxima madurez tienen la mayor capacidad espermatogénica y androgénica, en conjunto con el mejor funcionamiento de las glándulas reproductivas anexas, cualidades que podrían ser consideradas en las normativas de manejo y futuras actividades de cultivo de la especie

          Translated abstract

          Male Octopus mimus attains precocious maturity. In general, they are mature when their weight is 200 g or more and remain so until death. Since testicular physiology in adult males is not known, spermatogenesis was analyzed by histological observation of seminiferous tubules and endocrine function by quantification of testicular concentration of progesterone and testosterone together with growth and functionality of the androgen target organs. Three classes of adult males were identified : young mature, maximal maturity and regression. Regressed animals produce less of both hormones tested and show spermatogenic involution. These two traits denote ageing in O. mimus. On the contrary maximal maturity shows high spermatogenic and steroidogenic function and of the glands in the reproductive male tract. These characteristics should be considered for adequate commercial exploitation of this species

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          Most cited references39

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          The process of spermatogenesis in mammals.

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            Hormonal inhibition of feeding and death in octopus: control by optic gland secretion.

            J WODINSKY (1977)
            Female Octopus hummelincki lays eggs, broods them, reduces its food intake, and dies after the young hatch. Removal of both optic glands after spawning results in cessation of broodiness, resumption of feeding, increased growth, and greatly extended life-span. Optic gland secretions may cause death of most cephalopods and may function to control population size.
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              A review of reproductive strategies in cephalopods

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                Author and article information

                Journal
                ijmorphol
                International Journal of Morphology
                Int. J. Morphol.
                Sociedad Chilena de Anatomía (Temuco, , Chile )
                0717-9502
                2003
                : 21
                : 4
                : 315-323
                Affiliations
                [03] Antofagasta orgnameUniversidad de Antofagasta orgdiv1Facultad Ciencias de la Salud orgdiv2Departamento de Tecnología Médica Chile
                [02] Santiago orgnameUniversidad de Chile orgdiv1Facultad de Medicina orgdiv2Laboratorio Biología de la Reproducción Chile
                [01] Antofagasta orgnameUniversidad de Antofagasta orgdiv1Facultad Recursos del Mar orgdiv2Departamento de Acuicultura Chile
                Article
                S0717-95022003000400010 S0717-9502(03)02100410
                10.4067/S0717-95022003000400010
                9eedf833-7a36-4675-9965-27adc7961a5e

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 18 November 2003
                : 10 October 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 39, Pages: 9
                Product

                SciELO Chile


                Octopus mimus,Cephalopoda,Cefalópoda,Función testicular,Testicular function

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