Internal anatomy and ultrastructure of the male reproductive system of the spider crab Maja brachydactyla (Decapoda: Brachyura)

Simeó, Carles G.; Ribes, Eva; Rotllant, Guiomar

doi:10.1016/j.tice.2009.02.002

Cited by 51 publications

(181 citation statements)

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“…This seems to be the most commonly observed pattern in Podotremata and Eubrachyura (Zara et al, 2012). The testis is lobular with a highly convoluted seminiferous duct, as in C. danae (Zara et al, 2012) and observed in different brachyuran families (Simeó et al, 2009).…”

Section: Discussionmentioning

confidence: 61%

“…This crab supports an important smallscale fishery, as a bycatch of shrimp fishing (Severino-Rodrigues et al, 2001), and shows reproductive system. The male reproductive system has been studied in some brachyurans, including Portunidae (Cronin, 1947;Johnson, 1980;Stewart et al, 2010), Ucididae (Castilho et al, 2008), Eriphiidae (Erkan et al, 2009), Geryonidae (Hinsch and McKnight, 1988), Cancridae (Moriyasu et al, 2002), Grapsidae (Garcia and Silva, 2006), Epialtidae (Hinsch and Walker, 1974;Sal Moyano et al, 2009), Oregoneiidae (Beninger et al, 1988;Moriyasu and Benhalima, 1998;Sainte-Marie and Sainte-Marie, 1999), Inachidae (Diesel, 1989) and Majidae (Simeó et al, 2009(Simeó et al, , 2010.…”

Section: Introductionmentioning

confidence: 99%

“…The brachyuran testes can be classified as tubular, as observed in different species of Grapsoidea, Majoidea and Xanthoidea (Simeó et al, 2009); or as lobular which is seen in other brachyuran superfamilies (Simeó et al, 2009). In Portunidae the testes are characterized by multiple seminiferous lobules (Zara et al, 2012) and each seminiferous lobule is enclosed by accessory cells and releases the spermatozoa into the seminiferous duct (Cronin, 1947;Jivoff et al, 2007;Ryan, 1967;Johnson, 1980;Stewart et al, 2010;Zara et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Development of the male reproductive system in Callinectes ornatus Ordway, 1863 (Brachyura: Portunidae)

Nascimento

Zara

2013

Nauplius

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-This study describes the histology and histochemistry of the male reproductive system in Callinectes ornatus, comparing juvenile and adult developmental stages. We also analyzed changes in the gonadosomatic (GSI) and hepatosomatic (HSI) indices, and the weights of the testis and vas deferens during the development. The results showed that all stages, beginning with the juvenile (JUV), through developing (DEV) and mature (MAT) adult males of C. ornatus produce sperm and spermatophores. During development, testicular lobes showed the same characteristics of production and release of sperm into the seminiferous duct. The vas deferens showed little histological and histochemical change in the epithelium in juvenile and adult males. The differences consisted of the larger amount of secretion in MAT males compared to JUV and DEV ones. The chemical composition of the seminal fluid was similar, but MAT males produced a more homogeneous secretion. Morphological and physiological maturation are not synchronized in C. ornatus, since JUV males produced spermatophores similar to those in DEV and MAT males. However, these JUV are not yet able to reproduce, since they still have the abdomen attached to the cephalothoracic sternum. The increase of the GSI during development was significant for MAT males, and is related to the production of sufficient volume of seminal fluid to form the sperm "plug" in the female seminal receptacle. The HSI decreased from DEV to MAT adult stages, indicating that reserves from the hepatopancreas are used to develop the reproductive system after the pubertal molt.

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Section: Discussionmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of the male reproductive system in Callinectes ornatus Ordway, 1863 (Brachyura: Portunidae)

Nascimento

Zara

2013

Nauplius

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“…Recently, its taxonomic status has been clarified (Neumann, 1998;Sotelo et al, 2008), recognizing the Mediterranean M. squinado and the Atlantic M. brachydactyla as different species. Only a few studies focused on the morphology of the reproductive system (Mouchet, 1931;Neumann, 1996 as M. squinado;Simeó et al, 2009), spermatogenesis (Meusy, 1972 as M. squinado), and the spermatozoal ultrastructure (Tudge and Justine, 1994 as M. squinado;Simeó et al, in press). In this study, we give a detailed description of spermatogenesis in the spider crab, M. brachydactyla, using TEM.…”

Section: Introductionmentioning

confidence: 99%

Spermatogenesis of the spider crab Maja brachydactyla (Decapoda: Brachyura)

Simeó

Kurtz

Chiva

et al. 2009

Journal of Morphology

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This study describes spermatogenesis in a majid crab (Maja brachydactyla) using electron microscopy and reports the origin of the different organelles present in the spermatozoa. Spermatogenesis in M. brachydactyla follows the general pattern observed in other brachyuran species but with several peculiarities. Annulate lamellae have been reported in brachyuran spermatogenesis during the diplotene stage of first spermatocytes, the early and mid-spermatids. Unlike previous observations, a Golgi complex has been found in mid-spermatids and is involved in the development of the acrosome. The Golgi complex produces two types of vesicles: light vesicles and electron-dense vesicles. The light vesicles merge into the cytoplasm, giving rise to the proacrosomal vesicle. The electron-dense vesicles are implicated in the formation of an electron-dense granule, which later merges with the proacrosomal vesicle. In the late spermatid, the endoplasmic reticulum and the Golgi complex degenerate and form the structures-organelles complex found in the spermatozoa. At the end of spermatogenesis, the materials in the proacrosomal vesicle aggregate in a two-step process, forming the characteristic concentric three-layered structure of the spermatozoon acrosome. The newly formed spermatozoa from testis show the typical brachyuran morphology.

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“…There are consistent descriptions of the genital apparatus morphology in adult L. intermedia and other spider species (Alberti, 1991;Uhl, 2000;Uhl and Gunnarsson, 2001;Klann et al, 2005;Costa-Ayub and Faraco, 2007;Burger et al, 2006aBurger et al, , 2006bBurger and Kropf, 2007;Talarico et al, 2008;Simeó et al, 2009).…”

Section: Introductionmentioning

confidence: 64%

Development of Loxosceles intermedia Mello-Leitão (1934) (Araneae, Sicariidae) genital tract

Margraf¹,

Cl²,

et al. 2011

Braz. J. Biol.

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We examined the post-embryonic development of the male and female genital apparatus of the brown spider, Loxosceles intermedia. The development of the genital apparatus for both sexes begins with the appearance of inner structures. In the male genital apparatus, formation of the testes occurs first, followed by differentiation of the duct, ampulla and vas deferens, and finally the formation of the genital opening and differentiation of the copulatory organ (secondary sexual characteristic). Similarly, the development of the female genital apparatus begins with the formation of the ovaries, followed by the appearance of oocytes in vitellogenesis, then the development of oviducts and uterus internus and, finally, the spermatheca. These data may be very important in further comparative studies on the development of the reproductive system of spiders.Keywords: brown spider, reproductive system, post-embryonic development. Desenvolvimento do trato genital de Loxosceles intermedia Mello-Leitão (1934) (Aranea: Sicariidae) ResumoExaminamos o desenvolvimento pós-embrionário do aparelho genital masculino e feminino da aranha-marrom Loxosceles intermedia. O desenvolvimento do aparelho genital de ambos os sexos começa com o aparecimento de estruturas internas. No aparelho genital masculino a formação dos testículos ocorre primeiro, seguida pela diferenciação do ducto, ampola e vas deferens e, finalmente, a formação da abertura genital e diferenciação do órgão copulador (característica sexual secundária). Da mesma forma, o desenvolvimento do aparelho genital feminino começa com a formação dos ovários, seguida pelo aparecimento de oócitos em vitelogênese, o desenvolvimento dos ovidutos e uterus internus e, finalmente, a espermateca. Esses dados podem ser muito importantes em estudos comparativos sobre o desenvolvimento do sistema reprodutivo de aranhas.Palavras-chave: aranha marrom, sistema reprodutor, desenvolvimento pós-embrionário.

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Internal anatomy and ultrastructure of the male reproductive system of the spider crab Maja brachydactyla (Decapoda: Brachyura)

Cited by 51 publications

References 54 publications

Development of the male reproductive system in Callinectes ornatus Ordway, 1863 (Brachyura: Portunidae)

Development of the male reproductive system in Callinectes ornatus Ordway, 1863 (Brachyura: Portunidae)

Spermatogenesis of the spider crab Maja brachydactyla (Decapoda: Brachyura)

Development of Loxosceles intermedia Mello-Leitão (1934) (Araneae, Sicariidae) genital tract

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