Reproductive cycle of the European clam<i>Ruditapes decussatus</i>from Óbidos Lagoon, Leiria, Portugal

Machado, Daniela; Baptista, Teresa; Joaquim, Sandra; Anjos, Catarina; Mendes, Susana; Matias, Ana Margarete; Matias, Domitília

doi:10.1080/07924259.2018.1472671

Cited by 6 publications

(3 citation statements)

References 43 publications

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“…Because this index reflects the physiological status of the organisms, it suggests that environmental conditions at the reference site, where the clams naturally live, were less stressing than those at the exposure sites. In fact, biotic and abiotic factors, including water temperature, salinity, and prey species composition such as the amount of chlorophyll a in the water column and in the sediment, are known to influence the suitability of habitats for clam species and affect this index (Kim et al 2017; Machado et al 2018). Accordingly, Adkins et al (2016) showed decreased condition index on exposure to low‐salinity regimes.…”

Section: Resultsmentioning

confidence: 99%

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Silva

Cravo

Ferreira

et al. 2020

Enviro Toxic and Chemistry

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To evaluate the potential impact of an urban wastewater-treatment plant on Ria Formosa coastal lagoon, a sentinel species, the clam Ruditapes decussatus, was exposed along a gradient of the effluent's dispersal for 1 mo. Three exposure sites were selected to study the responses of 3 biomarkers: electron transport system, acetylcholinesterase, and lipid peroxidation. As complementary data, morphometric measurements, condition index, and lipid and protein content were considered together with in situ physicochemical characterization of the sites (temperature, salinity, pH, and dissolved oxygen). Electron transport system activity levels were between 35.7 and 50.5 nmol O 2 /min g protein, acetylcholinesterase activity levels ranged from 2.6 to 3.8 nmol/min g protein, and lipid peroxidation ranged from 174.7 to 246.4 nmol malondialdehyde/g protein. The exposure sites shaped the response not only of biomarkers but also of "health" parameters (protein, lipids, and condition index). Lipid peroxidation was the most responsive biomarker also associated with electron transport system, especially at the closest site to the urban wastewater-treatment plant. Because of the presence of complex mixtures of contaminants in urban effluents, biomarker responses can provide valuable information in environmental assessment. However, it is vital to identify all biological and ecological factors induced by the natural life cycle of clams. Abiotic factors can mask or overlap the response of biomarkers and should be considered in a multibiomarker approach.

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Section: Resultsmentioning

confidence: 99%

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Silva

Cravo

Ferreira

et al. 2020

Enviro Toxic and Chemistry

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“…In particular, chlorophyll-a values in spring showed an increase to occur in phytoplankton and positively affected condition index and meat yield of D. trunculus at the same time. The availability of food contributes (chlorophyll-a) to the good physiological state of clam (Machado et al 2018). Particulate organic material is considered to be available food to the mussel (Gri ths 1980) with an in uence on meat quality as well (Rebelo et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Annual reproductive cycle and meat yield of the Wedge Clam Donax trunculus Linnaeus, 1758 from Black Sea

Yıldız

Acarlı

Vural

et al. 2023

Preprint

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The study aims to determine the reproductive cycle, the condition index, meat yield, shell component index, shell thickness index and gonad index of bivalve Donax trunculus inhabiting the Kefken-Babalı location on the Black Sea in relation to environmental parameters between November 2013 and October 2014. Its gonadal development began in November. D. trunculus was in the inactive stage during autumn. Spawning was observed from May (18°C) to August (28°C). Sex ratios were not equal and number of males was higher during the study period (1.13:1) with one hermaphrodite individual only. Being synchronous between sexes based on histological analysis, the reproductive cycle consists of six stages. The study showed that the most ideal period to harvest of D. trunculus was between December and May, especially when the meat yield and condition index were determined to be highest.

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“…Previous studies on bivalve species from Portugal revealed that the reproductive cycle of venerids is characterized by a seasonal pattern influenced by seawater temperature and food availability. Populations of Ruditapes decussatus from Ria de Aveiro and Ria Formosa lagoons (Matias et al, 2013) and Óbidos lagoon (Machado et al, 2018), as well as Chamelea gallina in the Algarve coast (Joaquim et al, 2014), displayed a gametogenic cycle beginning with the initial stages of gametogenesis, followed by gonadal maturation and a spawning period culminating in a resting phase during winter. The population of Venerupis corrugata from Ria de Aveiro presented an extensive spawning season (Maia et al, 2006), with a short inactive period and gonads with signs of simultaneous gamete emission and recovery (Joaquim et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Reproductive cycle of the golden carpet shell (Polititapes aureus) in the Ria Formosa lagoon (southern Portugal)

Moura

Matias²,

Vasconcelos³

et al. 2022

J. Mar. Biol. Ass.

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The present study described the gametogenesis and assessed the pattern of energy storage throughout the reproductive cycle of the golden carpet shell (Polititapes aureus) from the Ria Formosa lagoon (southern Portugal). Monthly sampling was performed for two years (March 2016–February 2018) and the study was based on gonad histology, complemented by the estimation of the mean gonadal index, body condition index and biochemical composition. The species’ reproductive cycle presented a seasonal pattern, with a resting period mainly between October and January and gametogenesis beginning around February–March. The spawning season of P. aureus was shorter in 2016 (June–September) than in 2017 (May–October). Furthermore, ripe individuals were very scarce (1.3%) in 2017 compared with the previous year (11.4%). Mean gonadal index (GI) reflected the species’ reproductive cycle and the body condition index (CI) and biochemical composition of the individuals exhibited high variation between years. Regarding the biochemical composition, proteins ranged between 190.6 and 595.2 μg mg−1, glycogen from 5.7 to 102.6 μg mg−1 and total lipids between 31.6 and 80.7 μg mg−1. The reproduction of P. aureus was strongly influenced by fluctuations in both seawater temperature and chlorophyll a, as reflected through the temporal variation in the gonadal cycle, condition index and biochemical composition. Overall, the information gathered in this study is valuable to propose scientifically based harvesting management measures for the long-term sustainable exploitation of this shellfish resource, further reinforcing the importance of implementing adaptive fishery management strategies to cope with global climate change.

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Reproductive cycle of the European clamRuditapes decussatusfrom Óbidos Lagoon, Leiria, Portugal

Cited by 6 publications

References 43 publications

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Biomarker Responses of the Clam Ruditapes decussatus Exposed to a Complex Mixture of Environmental Stressors under the Influence of an Urban Wastewater‐Treatment Plant

Annual reproductive cycle and meat yield of the Wedge Clam Donax trunculus Linnaeus, 1758 from Black Sea

Reproductive cycle of the golden carpet shell (Polititapes aureus) in the Ria Formosa lagoon (southern Portugal)

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