The reproductive cycle of the European clam Ruditapes decussatus (L., 1758) in two Portuguese populations: Implications for management and aquaculture programs

Matias, Domitília; Joaquim, Sandra; Matias, Ana Margarete; Moura, Paula; Sousa, Joana; Sobral, Paula; Leitão, Alexandra

doi:10.1016/j.aquaculture.2013.04.030

Cited by 43 publications

(46 citation statements)

References 43 publications

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“…The reproductive cycle of R. decussatus observed in the present work is in agreement with previous studies on this species at Ria Formosa (Matias et al 2013, Pacheco et al 1989. The cycle was characterized by the onset of gametogenesis in January followed by the rapid development of gametes (Fig.…”

Section: Reproductive Cycle Of R Decussatussupporting

confidence: 83%

“…The co-occurrence of spawning and gonad recovery (phase V) during a long period of the year, concomitantly with nutrient storage and consumption, pointed to high reproductive effort of clams with a high capacity for gonadal regeneration. The continuous supply of gametes mirrors an advantageous strategy of this bivalve species (Matias et al 2013). …”

Section: Reproductive Cycle Of R Decussatusmentioning

confidence: 99%

“…The slides prepared for the histology were examined using a microscope at 40× magnification and each specimen was assigned to a phase which represented the gonadal state. Clam reproductive maturity was categorized into six phases using a scale development proposed by Delgado and Pérez-Camacho (2005) modified by Matias et al (2013): phase I, sexual rest; phase II, beginning of gametogenesis; phase III, advanced gametogenesis; phase IV, ripe; phase V, partially spawned; and phase VI, spent. When more than one developmental stage occurred simultaneously within a single individual, the assignment of a phase criteria decision was based upon the condition of the majority of the section.…”

Section: Histologymentioning

confidence: 99%

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Enhanced trace element concentrations in tissues of the clam Ruditapes decussatus transplanted to areas influenced by human activities (Ria Formosa, Portugal)

et al. 2017

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Summary:To examine the extent to which human activities near the Ria Formosa coastal lagoon influence the accumulation of trace elements (TE) in Ruditapes decussatus, individuals were transplanted from a natural bank located in the lower lagoon to three sites located in clam growth grounds under the influence of a small city (Faro), a fish farming centre (Olhão) and a site near the lagoon inlet (Lavajo). Concentrations were determined in substrate of the clam grounds and in the digestive gland, gills, mantle plus siphons, and remaining tissues of clams in four periods of the year. These measurements were accomplished with the monthly survey of the gametogenic stages, condition index, proteins, glycogen, total lipids, pH and osmolarity of hemolymph. Arsenic, Cu, Mn, V, Cr and Pb were preferentially linked to the digestive gland, while Cd was linked to the gills. TE concentrations in the digestive gland and remaining tissues were higher in winter, most likely reflecting additional inputs associated with rain. The lack of disruptions in biological parameters and the prolonged period of spawning and gonad recovery in clams suggest that the current TE availability in the lagoon has a minor influence on the reproductive cycle and hence on clam production. Keywords: trace elements; biological parameters; Ruditapes decussatus; Ria Formosa. Aumento de la concentración de elementos traza en tejidos de la almeja Ruditapes decussatus trasplantada a zonas influenciadas por actividades humanas (ría Formosa, Portugal)Resumen: Para examinar en qué medida las actividades humanas cercanas a la laguna costera ría Formosa influyen en la acumulación de elementos traza (ET) en Ruditapes decussatus, se trasplantaron individuos desde un banco natural situado en la parte baja de la laguna a tres sitios localizados en zonas de cultivo de almejas bajo la influencia de una ciudad pequeña (Faro), un centro piscícola (Olhão) y cerca de la entrada de una laguna (Lavajo). Se determinaron las concentraciones de ET en el substrato de locales y en la glándula digestiva, branquias, manto más sifones, y en los tejidos restantes de las almejas en cuatro períodos a lo largo de un año. Estas mediciones fueron realizadas con el estudio mensual de las etapas gametógenas, índice de condición, proteínas, glicóneo, lípidos totales, pH y osmolaridad de la hemolinfa. El As, Cu, Mn, V, Cr y Pb fueron relacionados preferencialmente a la glándula digestiva, mientras que el Cd fue a las branquias. La concentración de ET en la glándula digestiva y los tejidos restantes fue más elevada en invierno, probablemente reflejando los aportes adicionales asociados con la lluvia. La falta de alteraciones de los parámetros biológicos, el período prolongado de desove y la recuperación de las gónadas en las almejas sugieren que la disponibilidad actual de ET en la laguna tienen una influencia menor durante el ciclo reproductivo y, por lo tanto, en la producción de almejas.

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Section: Reproductive Cycle Of R Decussatussupporting

confidence: 83%

Section: Reproductive Cycle Of R Decussatusmentioning

confidence: 99%

Section: Histologymentioning

confidence: 99%

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Enhanced trace element concentrations in tissues of the clam Ruditapes decussatus transplanted to areas influenced by human activities (Ria Formosa, Portugal)

et al. 2017

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“…For gametogenesis the energy is generally stored in the form of glycogen, but when food is abundant, lipids and proteins may also serve as an energy source. The particular importance of these substrates can vary among bivalve species and among populations of the same species who have different strategies for energy storage and utilization (Pogoda et al 2013, Matias et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in reproductive activity and biochemical composition of flat oyster (Ostrea edulis) in the Homa Lagoon, Izmir Bay, Turkey

et al. 2015

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Summary:The reproductive cycle of the flat oyster, Ostrea edulis Linnaeus, 1758, in Homa Lagoon, Izmir Bay, Turkey was examined from August 2008 to July 2009. Gonad samples were analysed histologically in order to determine the sex ratio and gonad development stage. Overall, the sex ratio was recorded as 2.2% female, 42.6% male, 37% hermaphrodite and 17.9% inactive. Glycogen content showed considerable variations between August and February, but decreased gradually thereafter. However, glycogen did not directly affect the reproductive cycle. Total lipid content was positively correlated with temperature and inversely correlated with salinity. In addition, this parameter was influenced by the reproductive activity, which is correlated with the fluctuation of the condition index and gonad index (P<0.05). However, the relationship between the protein index and the gonad index was negative (P<0.05). The results of this study showed that protein was the major energy resource. The condition index varied between 2.69±0.91 (February) and 12.29±1.45 (April) during the year. With respect to meat yield, oyster quality changed from "fine" to "special", except in December and February.Keywords: flat oyster; Ostrea edulis; reproductive cycle; biochemical composition; Aegean Sea; Homa Lagoon.Variación estacional de la actividad reproductiva y de la composición bioquímica de ostra plana (Ostrea edulis) en Homa Lagoon, bahía de Izmir, Turquía Resumen: El ciclo reproductivo de la ostra plana, Ostrea edulis Linnaeus, 1758, en Homa Lagoon, Bahía de Izmir, Turquía, fue examinado entre agosto de 2008 y julio de 2009. Las gónadas se analizaron histológicamente para determinar la proporción de sexos y su estado de desarrollo. La proporción de sexos encontrada fue 2.2% hembras, 42.6% machos, 37% hermafroditas y 17.9% inactivos. El contenido de glucógeno mostró considerables variaciones entre agosto y febrero, pero después de estos meses se produjo un aumento gradual. Sin embargo el glucógeno no afectó directamente el ciclo reproductivo. El contenido total de lípidos se correlacionó positivamente con la temperatura e inversamente con la salinidad. Además, este parámetro estuvo influenciado por la actividad reproductiva, que se correlaciona con la fluctuación del índice de condición y del índice gonadal (P<0,05). Sin embargo la relación entre el índice de proteí-na y el índice gonadal fue negativa (P<0,05). Los resultados de este estudio mostraron que la proteína era la principal fuente de energía. El índice de condición varió entre 2.69±0.91 (febrero) y 12.29±1.45 (abril) durante el año. En lo que respecta a la producción de carne, la calidad de las ostras pasó de "fine" to "special", excepto en diciembre y febrero.

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“…In bivalves and specifically in R. decussatus, the gonad passes through several developmental stages from sexual rest to ripe and spent (Delgado and Pérez Camacho 2005;Matias et al 2013). In these last stages mature oocytes are spawned while those that are not released begin their resorption in the gonad.…”

Section: Stress and Apoptosismentioning

confidence: 99%

A microarray-based analysis of oocyte quality in the European clam Ruditapes decussatus

et al. 2015

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A microarray-based analysis was performed with the objective of describing genomic features of oocytes and looking for potential markers of oocyte quality in the economically important European clam, Ruditapes decussatus. Oocytes of 25 females from Ria de Aveiro, Western coast of Portugal (40°42′N; 08°40′W) were selected for this study and oocyte quality was estimated by success of D-larval rate under controlled conditions, which appeared to vary from 0 to 95 %. By genome-wide expression profiling with a DNA microarray, 526 probes appeared differentially expressed between two groups representing the largest and smallest value of D larval rates, named good (represented by a mean D-larval yield of 57 ± 22%) and poor (9 ± 5%) quality oocytes. Enrichment analysis showed “Lysosome” (dre04142) as the single pathway represented in the enriched KEGG pathway terms, with 8 genes coding for putative Cathepsins. Furthermore, differentially expressed genes involved in oocyte protection (DnaJ (Hsp40), Hsp70, Cyclophilin B, PDI), maturation (Cam-PDE1C, PRDM9, G protein), sperm-egg interaction (PDI, G protein) and apoptosis (TNF) were also identified. From these, the apoptosis pathway was supposed to assume an important role in oocyte quality as the mRNA level of Caspase 8 appeared also negatively correlated with the D-larval yield. Finally, a G-protein transcript was identified as more abundant in poor quality oocytes, which underlines the importance of release prophase I block and meiotic maturation in the oocytes of this species. This study provided new highly valuable information on genes specifically expressed by mature oocytes of R. decussatus, for further understanding of the mechanisms of early development in this species

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The reproductive cycle of the European clam Ruditapes decussatus (L., 1758) in two Portuguese populations: Implications for management and aquaculture programs

Cited by 43 publications

References 43 publications

Enhanced trace element concentrations in tissues of the clam <em>Ruditapes decussatus</em> transplanted to areas influenced by human activities (Ria Formosa, Portugal)

Enhanced trace element concentrations in tissues of the clam <em>Ruditapes decussatus</em> transplanted to areas influenced by human activities (Ria Formosa, Portugal)

Seasonal variation in reproductive activity and biochemical composition of flat oyster (<em>Ostrea edulis</em>) in the Homa Lagoon, Izmir Bay, Turkey

A microarray-based analysis of oocyte quality in the European clam Ruditapes decussatus

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