Morphological and functional study of the male reproductive tract in the shrimp<i>Pleoticus muelleri</i>Bate (Decapoda, Penaeoidea)

Díaz, Ana Cristina; Fernández-Gimenez, Analía Verónica; Petriella, Ana María; Fenucci, Jorge L.

doi:10.1080/07924259.2002.9652511

Cited by 10 publications

(13 citation statements)

References 4 publications

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“…Terminal ampullae were classified either as spent (Stage I) or developed (Stage II) depending upon the absence or presence of spermatophores contained by these structures, respectively (as in Bauer 1991, Bauer & Cash 1991, Nakagaki & Negreiros-Fransozo 1998, Díaz et al 2002. Maturity of the ovaries was determined based on color and volume of this organ within the cephalothorax of female shrimps.…”

Section: Reproductive Parameters and Recruitmentmentioning

confidence: 99%

Reproductive biology and recruitment of Xiphopenaeus kroyeri in a marine protected area in the Western Atlantic: implications for resource management

Almeida¹,

Baeza²,

Fransozo³

et al. 2012

Aquat. Biol.

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The potential of a recently established marine protected area (MPA) in the Western Atlantic, Brazil, as a 'seed production' and nursery ground for Xiphopenaeus kroyeri, an intensively exploited penaeid shrimp, was investigated in an attempt to reveal any future benefit of this new MPA to adjacent populations experiencing heavy exploitation. Overall, we observed that males and females >12 and 20 mm carapace length, respectively, contributed the most to reproduction in the studied population. Reproductive activity of X. kroyeri was continuous at the MPA; 2 annual reproductive peaks were recorded from March to April and from November to December, which were followed by recruitment events occurring from March to April 2009 and November 2009. Sediment, temperature, and algae and plant biomass floating near the bottom were relevant in driving reproductive activity and recruitment in X. kroyeri. The high reproductive potential of the studied population and the occurrence of abundant juveniles throughout the sampling area, indicating the existence of a nursery ground within the region, suggest that this MPA might provide important benefits in the near future. We argue in favor of future long-term studies on the larval dispersion, reproductive biology and ecology of X. kroyeri in MPAs and non-MPAs to construct a base for future management of this species and to aid stock recovery in fishing areas that are heavily exploited. KEY WORDS: Marine protected area · Xiphopenaeus kroyeri · Size at first maturity · Reproductive potential · Nursery ground · Environmental parameters · Stock recoveryResale or republication not permitted without written consent of the publisher Aquat Biol 17: 57-69, 2012 from 6 000 t in the 1960s to 42 787 t in the 2000s (FAO 2011). From 1960 to 2009, 513 785 t (~51%) of the total global catch (1 013 993 t) was extracted from the Brazilian coast (FAO 2011).In the northern, northeastern, southeastern and southern regions of the Brazilian coast, which were described by Matsuura (1995) as the major fishing grounds, the seabob shrimp is heavily exploited by trawl fishing boats (Vasconcellos et al. 2007(Vasconcellos et al. , 2011. Vasconcellos et al. (2007) collected information about the status of stocks of Xiphopenaeus kroyeri based on the analysis of time-series landings by artisan fisheries during the period 1980 to 2002. These authors categorized the status of this shrimp as underexploited in the northern region, moderately exploited in the northeastern region, and overexploited in the southeastern and southern regions of Brazil. Furthermore, X. kroyeri is classified as overfished by the Brazilian government because of the high capture rates of specimens from most or all size/ age classes throughout the range of distribution of this species along the coast of Brazil (Ministry of the Environment, Normative Instruction 5, 21 May 2004).Due to overexploitation in the southeastern and southern regions, the stocks of Xiphopenaeus kroyeri have presented a continuous decrease in landings since th...

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Section: Reproductive Parameters and Recruitmentmentioning

confidence: 99%

Reproductive biology and recruitment of Xiphopenaeus kroyeri in a marine protected area in the Western Atlantic: implications for resource management

Almeida¹,

Baeza²,

Fransozo³

et al. 2012

Aquat. Biol.

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“…The anatomical and functional characteristics of the vas deferens vary among Decapoda species (Amadio & Mantelatto, ; Cronin, ; Diaz et al, ; Manjón‐Cabeza & Raso, ; Pillai et al, ; Simeó et al, ). Our study defined three regions within the vas deferens based on anatomical and histological observations.…”

Section: Discussionmentioning

confidence: 99%

“…Crustacea is a diverse taxon with a variable body plan, also reflected in the morphology of the reproductive system (Felgenhauer, ; Krol et al, ). Decapoda (Table ) have two anatomical conformations of the testis: either a tubular type, for example, Anomura, Brachyura, and Astacidea (Rudolph, ; Rudolph et al, ; Simeó et al, ; Subramoniam, ), or a lobed, mostly found in Achelata, Penaeidae, and Caridea (Diaz et al, ; Fransozo et al, ; Pillai et al, ; Poljaroen et al, ; Tripathi & Pandey, ). These anatomical patterns are associated with two distinct histological configurations: either seminiferous tubules, which are convoluted ducts with germinal epithelium, or lobules, which are spherical cysts with a germ‐cell cluster (Hobbs et al, ; Krol et al, ).…”

Section: Introductionmentioning

confidence: 99%

Morphology of the male reproductive system of freshwater prawn Macrobrachium carcinus (Decapoda, Caridea): Functional and comparative aspects

Ruiz

Vidal

Gardinal

et al. 2020

Journal of Morphology

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Testes and vasa deferentia are parts of the male reproductive system of decapod crustaceans. Both organs show morphological differences among decapod species in terms of anatomical and histological patterns reflecting the diversity of this group.Describing these features may assist in systematics, phylogenetics, and studies of reproductive behavior, especially for species of commercial interest, such as Macrobrachium carcinus, a native American species that, unusually for this genus, has no precopulation courting behavior. This study aims to describe the reproductive morphology and spermatogenesis of the male freshwater prawn M. carcinus. The male reproductive system of this species consisted of lobed testes connected to the vasa deferentia. The testis of M. carcinus was divided into several lobules. Each lobule was formed by a cluster of germ cells surrounded by connective tissue and nurse cells.This microscopic anatomy and histology of the testicular histoarchitecture has been described for many species of Decapoda and may represent a derived design of the testes. Unlike that in other decapod species, spermatogenesis proceeds in short transitory phases that produce spermatozoa at high concentrations and frequencies, corroborating the uncommon male reproductive behavior of this species. In the spermatic pathway, the lobules develop and fuse before releasing spermatozoa from the testes; however, this process has not been observed in decapods, yet. The neutral compounds secreted by the vas deferens are important for sperm nutrition as females secrete a substance for spermatophore adhesion during reproduction. This study presents different features and dynamics of the spermatogenic process in the male reproductive system of M. carcinus that have not yet been presented in the literature for decapods.

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“…En esta especie la formación de los espermatóforos se inicia en el VDA (CUARTAS & PETRIELLA, 2007). Por lo tanto la AT no tendría la función de estructuración de los mismos como proponen (DIAZ et al, 2002) para el langostino Pleoticus muelleri Bate, 1832. La existencia de cuatro cámaras aseguraría el almacenamiento del esperma y la transferencia espermática en sucesivas inseminaciones.…”

Section: Discussionunclassified

[No Title Available]

Cuartas

Petriella

2010

Iheringia, Sér. Zool.

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ABSTRACT. Structure of the male reproductive tract of Uca uruguayensis (Decapoda, Ocypodidae). The structure of the male reproductive tract was described in Uca uruguayensis Nobili, 1901, by using histological methods, scanning electron microscopy techniques, and stereoscopic observations of fresh material. The aim of this work was to establish the functional changes associated with sexual maturation. The morphology of the first (G1) and second (G2) pair of gonopods was described. The male reproductive tract consists of paired organs: testes, and tubular and convoluted vas deferens (VD) ending with a terminal ampoule (TA).The (VD) is composed of three parts: anterior (AVD), medial (MVD) and posterior (PVD). The AVD and MVD are lined by a single layer of cubical cells. The PVD epithelial cells are columnar with elongated nuclei. The terminal ampoule comprises four interconnecting chambers and is externally surrounded by connective tissue. The study of testes and vas deferens at different times along the year suggests that U. uruguayensis has a single and continuous reproductive season from December to March. The TA has not been described in other brachyurans and this structure is novel to Brachyura. KEYWORDS.Male reproductive tract, functional morphology, Crustacea, Brachyura.RESUMEN. El objetivo de este trabajo es describir las estructuras del sistema reproductor de machos de Uca uruguayensis Nobili, 1901 y estudiar los cambios relacionados con la madurez sexual. Se trabajó con observación estereoscópica de material fresco, técnica histológica de rutina y observaciones en Microscopio Electrónico de Barrido. Se incluyó la caracterización de los gonopodos 1 (G1) y 2 (G2). El tracto reproductor del macho se compone de un par de testículos (T), un vaso deferente (VD) tubular y sinuoso y una ampolla terminal (AT). El VD tiene tres secciones, la anterior (VDA), la media (VDM) y la posterior (VDP). El VDA y VDM están conformadas por un epitelio simple de células cúbicas. El epitelio del VDP es columnar y con núcleos basales y alongados. El diseño tubular se modifica al ocuparse el lumen del VDP con líquido espermático durante el verano y la musculatura circular se hace más evidente. La porción terminal del VDP se ensancha formando una ampolla (AT) que comprende cuatro cámaras interconectadas. Todas las estructuras están rodeadas de una capa de tejido conectivo de poco espesor. Se identifican las modificaciones observadas en la histología de T y VD, definiendo como mas relevantes las observadas desde el mes de noviembre hasta marzo. Estas modificaciones sugieren que U. uruguayensis tiene, en la localidad estudiada, una única estación reproductiva durante el verano en esta latitud. La AT, tal como es descripta, es una estructura que hasta el momento no ha sido mencionada para los Brachyura. PALABRAS CLAVE.Tracto reproductor masculino, morfología funcional, Crustacea, Brachyura.

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Morphological and functional study of the male reproductive tract in the shrimpPleoticus muelleriBate (Decapoda, Penaeoidea)

Cited by 10 publications

References 4 publications

Reproductive biology and recruitment of Xiphopenaeus kroyeri in a marine protected area in the Western Atlantic: implications for resource management

Reproductive biology and recruitment of Xiphopenaeus kroyeri in a marine protected area in the Western Atlantic: implications for resource management

Morphology of the male reproductive system of freshwater prawn Macrobrachium carcinus (Decapoda, Caridea): Functional and comparative aspects

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