The reproductive biology of the Manila clam, Ruditapes philippinarum, from the North-West of Ireland

Drummond, Linda; Mulcahy, Mark; Culloty, Sarah C.

doi:10.1016/j.aquaculture.2005.10.052

Cited by 99 publications

(55 citation statements)

References 14 publications

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“…As has been described by various authors (Xie and Burnell, 1994;Delgado, 2002;Meneghetti et al, 2004;Drummond et al, 2006), there is a high degree of asynchronicity between individuals regarding gonadal development in the two species, and it can therefore be hard to assign a specific reproductive phase to a given population of either one. In the case of R. philippinarum this asynchronicity is transferred to the gonad itself, with three different reproductive phases frequently being found within the same individual.…”

Section: Discussionmentioning

confidence: 91%

“…Some authors confine reabsorption phenomena, or a state of gonadal restoration, to post-total spawning phases at the end of the gonadal cycle (Drummond et al, 2006). Medhioub (1986) locates this phenomenon after the final spawnings and detects invasions of granulocytes in the gonadal tubules surrounding the residual gametes, which atrophy and return the gonad to a state of sexual rest.…”

Section: Discussionmentioning

confidence: 99%

“…This asynchrony is also expressed within the gonad of each individual, and areas with different degrees of maturity usually coexist in the same individual. Nevertheless, in accordance with the description given by Drummond et al (2006) in their study of this species, each individual has been assigned the reproductive phase that corresponds to that of the greatest number of follicles. Results show how a temperature increment accelerates the gonadal development of R. philippinarum.…”

Section: Ruditapes Philippinarummentioning

confidence: 99%

“…Many studies have been published on the reproductive cycle of R. philippinarum in the natural environment both in the areas of origin of this species, like Japan (Ohba, 1959;Toba et al, 1993), and in parts of the world in which it has been introduced: the East Pacific (Holland and Chew, 1974), European coasts (Sarasquete et al, 1990;Ponurovsky and Yakovlev, 1992;Rodríguez-Moscoso et al, 1992;Meneghetti et al, 2004;Drummond et al, 2006) and African Atlantic coasts (Shaffee and Daouidi;1991). The bibliography on R. decussatus, however, is not so extensive (Pérez-Camacho, 1980;Villalba et al, 1993;Rodríguez-Moscoso and Arnaíz, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of gonadal development of Ruditapes philippinarum (Adams and Reeve) and Ruditapes decussatus (L.) (Mollusca: Bivalvia): Influence of temperature

Delgado¹,

Pérez-Camacho²

2007

Sci. Mar.

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SUMMARY: Laboratory experiments were used to study the influence of temperature on the reproductive behaviour of two species of clam, Ruditapes decussatus and Ruditapes philippinarum, during their adaptation to the temperature conditions of Galician coastal waters. In both species the rate of gonadal development was directly related to the increase in temperature. At 14ºC the reproductive behaviour was similar, both species needing over 2 months to mature. At 18ºC, the rate of gonadal development of R. philippinarum was greater than that of R. decussatus. Nevertheless, the results of this study confirm that both species have adapted perfectly to the temperature conditions of the Galician Rias, though certain differences between the reproductive behaviour of these species were detected. R. philippinarum accumulates oocytes prior to their partial or total emission, while in the case of R. decussatus gametes are liberated continuously. In the early phases of its development, the gonad of R. philippinarum is highly heterogeneous in nature, with up to 3 reproductive states being present at the same time, while in R. decussatus gonadal development is much more uniform. Another major difference concerns the phenomenon of reabsorption, common in R. philippinarum but very rare in R. decussatus. These characteristics may well result in a greater reproductive activity in R. philippinarum than in R. decussatus, and a longer reproduction period in the former. They may also represent a certain advantage for the adaptation of the foreign species (R. philippinarum) over the native species (R. decussatus) to the temperature conditions of the Galician Rias.Keywords: gonadal development, temperature, histology, Ruditapes decussatus, Ruditapes philippinarum, hermaphroditism. RESUMEN: ESTUDIO COMPARATIVO DEL DESARROLLO GONADAL DE RUDITAPES PHILIPPINARUM (ADAMS AND REEVE) YRUDITAPES DECUSSATUS (L.) (MOLLUSCA: BIVALVIA): INFLUENCIA DE LA TEMPERATURA. -Se llevaron a cabo experiencias de laboratorio para estudiar la influencia de la temperatura en el comportamiento reproductivo de dos especies de almeja, R. philippinarum y R. decussatus, en su adaptación a las condiciones térmicas en las costas de Galicia. En ambas especies la tasa de desarrollo gonadal está directamente relacionada con el incremento de temperatura. A 14ºC el comportamiento reproductivo es similar y ambas especies necesitan cerca de 2 meses para madurar. A 18ºC, la tasa de desarrollo gonadal de R. philippinarum es mayor que en R. decussatus. No obstante, los resultados de este estudio confirman que ambas especies se han adaptado perfectamente a las condiciones térmicas de las rías de Galicia, si bien, se detectan ciertas diferencias en su comportamiento reproductivo. Así, mientras R. philippinarum acumula ovocitos antes de su emisión parcial o total, en el caso e R. decussatus los gametos se liberan continuamente. En las primeras fases de su desarrollo, el aspecto de la gónada de R. philippinarum es muy heterogéneo, presentándose hasta 3 estados reproductivos simultánea...

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Ruditapes Philippinarummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative study of gonadal development of Ruditapes philippinarum (Adams and Reeve) and Ruditapes decussatus (L.) (Mollusca: Bivalvia): Influence of temperature

Delgado¹,

Pérez-Camacho²

2007

Sci. Mar.

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“…Although it is native to Sakhalin, Japan, Korea and China (Gosling 2003), it was accidentally introduced into Puget Sound, Washington, USA, with the Pacific oyster Crassostrea gigas, in the 1930s (Williams 1980), and it has been cultured since the late 1970s (Becker et al 2008). In the early 1970s, it was introduced from the USA for aquaculture purposes to France (Flye-Sainte-Marie et al 2007) and the UK (Utting and Spencer 1992); it was introduced to Italy in the 1980s (Chiesa et al 2011) and to Ireland in 1984 (Drummond et al 2006), and from the UK to Israel (Shpigel and Spencer 1996). China is the number one country in the world in terms of production of the Manila clam, producing about 1.8 million metric tons annually, which accounts for about 90 % of global production (Zhang and Yan 2006).…”

Section: Introductionmentioning

confidence: 99%

Molecular and morphological evidence of hybridization between native Ruditapes philippinarum and the introduced Ruditapes form in Japan

et al. 2013

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Marine aquaculture and stock enhancement are major causes of the introduction of alien species. A good example of such an introduction is the Japanese shortneck clam Ruditapes philippinarum, one of the most important fishery resources in the world. To meet the domestic shortage of R. philippinarum caused by depleted catches, clams were imported to Japan from China and the Korean peninsula. The imported clam is an alien species that has a very similar morphology, and was misidentified as R. philippinarum (hereafter, Ruditapes form). We genotyped 1,186 clams of R. philippinarum and R. form at four microsatellite loci, sequenced mitochondrial DNA (COI gene fragment) of 485 clams, 34 of which were R. variegatus, and measured morphometric and meristic characters of 754 clams from 12 populations in Japan and China, including the Ariake Sea and Tokyo Bay, where large numbers of R. form were released. Our analyses confirmed that R. form was from the genus Ruditapes, and the genetic differentiation between R. philippinarum and R. form was distinct, but small, compared with five bivalve outgroups. However, R. form had distinct shell morphology, especially larger numbers of radial ribs on the shell surface, suggesting that R. form might be a new Ruditapes species or a variation of R. philippinarum that originated from southern China. A genetic affinity of the sample from the Ariake Sea to R. form was found with the intermediate shell morphology and number of radial ribs, and the hybrid proportion was estimated at 51.3 ± 4.6 % in the Ariake Sea.

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A state‐space model to estimate spawning rates in a Ruditapes philippinarum population

Hanyu¹

2023

Population Ecology

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The Ruditapes philippinarum catch in Japan has drastically declined and its recovery is a major challenge. The spawning rates and egg output need to be estimated to discuss stock management strategies. However, it is difficult to observe these directly in a field survey. This study proposes a state-space model to estimate spawning rates in an R. philippinarum population using the number of individuals at each developmental stage based on traditional histological observations of the gonads. An example of its application to monthly observed data of an R. philippinarum population on the western Japanese coast is also presented. The spawning seasons were quantitatively detected in spring and fall, and the durations were estimated to be 2.8 months in spring and 3.0-3.5 months in fall, based on the spawning rates. The mean condition factor was lower in fall than in spring, but females with a high condition factor were also found in fall. The egg output of these individuals during the fall may be large. The spawning frequency per individual was estimated to be 6.5 times per year based on the model, indicating that R. philippinarum is an r-strategy species capable of multiple spawning. Questioning how the spawning rates vary with individual size/age and environmental conditions is essential for estimating egg output in R. philippinarum populations. The state-space model in this study can contribute to the quantification of spawning rates. The results will contribute to estimating the egg output and stock management strategies.

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The reproductive biology of the Manila clam, Ruditapes philippinarum, from the North-West of Ireland

Cited by 99 publications

References 14 publications

Comparative study of gonadal development of <i>Ruditapes philippinarum</i> (Adams and Reeve) and <i>Ruditapes decussatus</i> (L.) (Mollusca: Bivalvia): Influence of temperature

Comparative study of gonadal development of <i>Ruditapes philippinarum</i> (Adams and Reeve) and <i>Ruditapes decussatus</i> (L.) (Mollusca: Bivalvia): Influence of temperature

Molecular and morphological evidence of hybridization between native Ruditapes philippinarum and the introduced Ruditapes form in Japan

A state‐space model to estimate spawning rates in a Ruditapes philippinarum population

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