Impacts of Sublethal and Lethal High Temperatures on Clams Exploited in European Fisheries

Macho, Gonzalo; Vázquez, Elsa

doi:10.2983/035.035.0215

Cited by 39 publications

(34 citation statements)

References 68 publications

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“…R. philipinarum is more resistant than other species to environmental shocks produced by anthropogenic pressures (e.g., dams, floodings, heatwaves, etc.) (e.g., Dominguez et al, 2016;Macho et al 2016), and weight per individual is higher than others. Cockle (C. edule and C. glaucum) production here depends exclusively on natural seeding and recruitment.…”

Section: Shellfisheries In Galicia (Spain)mentioning

confidence: 86%

The role of non-natural capital in the co-production of marine ecosystem services

Outeiro

Ojea

Rodrigues

et al. 2017

International Journal of Biodiversity Science, Ecosystem Servic

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A growing concern is arising to recognize that ecosystem services (ES) production often requires the integration of non-natural capital with natural capital in a process known as coproduction. Several studies explore co-production in different terrestrial ecosystems, such as agriculture or water delivery, but less attention has been paid to marine ecosystems. Coastal activities such as aquaculture, shellfish harvesting, and small-scale fishing deliver important benefits for seafood provision, but are also inextricably linked to cultural and recreational ES. The degree to which co-production can determine the provision of ES in marine systems has yet not been explored. This paper addresses this key topic with an exploratory analysis of case studies where marine ES are co-produced. We look at five small-scale fisheries that range from intensive semi-aquaculture in Galicia (Spain), to wild harvesting in Northern Portugal, and discuss to what extent co-production influences ES delivery. We find that a direct relationship exists between co-production level and ES delivery in the case of provisioning ES (e.g., fish harvest), but not necessarily in the delivery of other ES. We also find that management practices and property regimes may be affecting trade-offs between co-production and ES.

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Section: Shellfisheries In Galicia (Spain)mentioning

confidence: 86%

The role of non-natural capital in the co-production of marine ecosystem services

Outeiro

Ojea

Rodrigues

et al. 2017

International Journal of Biodiversity Science, Ecosystem Servic

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“…Temperature treatments, similar to those experienced by bivalves in the field during heat waves in previous years (Macho et al, 2016;Domínguez et al, 2021;Figure 3C), were set at 20, 27, 32, and 37 • C (hereafter T20, T27, T32, and T37, respectively). To produce experimental temperatures we used infrared ceramic lamps (FTE 150-watt heaters, Ceramicx) over each tank controlled by digital controllers (Omega CN7853) with feedback thermocouples placed at 2 cm depth in the sediment in the middle of each tank.…”

Section: Heatwave Stress Experimentsmentioning

confidence: 99%

“…The physiological responses to temperature and salinity fluctuations of these four bivalves have been recently investigated by our research team in mesocosm experiments in which field conditions were simulated (Macho et al, 2016;Peteiro et al, 2018;Domínguez et al, 2020). Early recruits of C. edule showed a lethal limit at salinity of ∼15 and a marked reduction of activity (i.e., continuous valve closure and inhibition of respiration and ammonium excretion rates) at salinities between 15 and 30 (Peteiro et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Reproduction Under Stress: Acute Effect of Low Salinities and Heat Waves on Reproductive Cycle of Four Ecologically and Commercially Important Bivalves

et al. 2021

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The impacts of climate change on the structure and functioning of estuaries is a major focus of concern, even more when the affected species support important fisheries as the bivalves Ruditapes decussatus, Ruditapes philippinarum, Venerupis corrugata, and Cerastoderma edule in Europe. Their reproductive performance, in the context of climate stressors, had not been investigated so far. Our objective was to experimentally evaluate acute stress effects over gonad development after 6 days of low salinity stress in autumn, winter and spring as well as 4 days of heatwave stress during emersion in summer. These are the most probable extreme events that bivalves should face in our latitudes. Four different salinity ramps (5–20, 10–25, 15–30, 30–30) were created during simulated tidal cycles in mesocosms for the low salinity experiments. Also four sediment heatwaves at emersion (20–20, 20–27, 20–32, 20–37°C) were done during simulated tidal cycle. Both low salinity and heatwave stresses over such short periods compromised reproduction; the acute response was species-specific and varied with the time of the year, and therefore, with the stage of the gametogenic cycle. In December, during sexual resting and the beginning of gametogenesis, a delay in gametogenesis at lower salinities was recorded in the four species. However, at the peak of the reproductive period (March and May), different responses were observed: abnormal oocytes in R. decussatus and resorption of gametes with haemocytic infiltration in R. philippinarum and V. corrugata. Likewise sediment temperatures higher than 32°C provoked gonadal resorption and severe haemocytic invasion in V. corrugata, R. decussatus, and C. edule but had no effect in R. philippinarum. These responses to both environmental stressors might be related to the allocation of energy from reproduction toward defense and repair mechanisms to ensure survival. Contrastingly, low salinities triggered massive spawning in C. edule that could lead to a mismatch between the presence of larvae and phytoplankton, causing potentially starvation and thus reducing recruitment success. Reproduction of theses bivalves would be compromised if low salinity episodes in winter and spring, even for short periods of time such as those in these experiments, are followed by a heatwave in summer. Furthermore the impact would be magnified if this situation happens during consecutive years preventing replenishment of the shellfish beds.

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“…Similarly, a temperature range of 15–28 °C is optimal for growth, although the species can survive at 0 °C and 35 °C for short periods of time [ 2 ]. Macho et al [ 15 ] observed a 33% mortality rate in Manila clams after two days of tidal exposure to 36 °C, although no mortality occurred when the clams were exposed to 34 °C. These studies indicate that unusually high water temperatures cause severe physiological stress to marine bivalves.…”

Section: Discussionmentioning

confidence: 99%

High parasite burden increases the surfacing and mortality of the Manila clam (Ruditapes philippinarum) in intertidal sandy mudflats on the west coast of Korea during hot summer

et al. 2018

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BackgroundOver the past few decades, mass mortality events of Manila clams have been reported from several tidal flats on the west coast of Korea during hot summers. During such mortality events, once clams simultaneously surface, they fail to re-burrow, perishing within a week. The present study aimed to identify the possible causes of the mass mortality of this clam species by investigating the Perkinsus olseni parasite burden and immune parameters of surfaced clams (SC) and normal buried clams (NBCs) when sea water or sediment temperature in the study area varied from 25 °C to 34 °C from late July through mid-August 2015.ResultsWe collected 2 groups of clams distributed within a 10-m2 area when a summer clam mortality event occurred around Seonyu-do Island on the west coast of Korea in 2015. The clams were collected 2 days after they surfaced on the sediment and still looked healthy without any gaping. The clams were transported to the laboratory, and we compared P. olseni infection intensity and cell-mediated hemocyte parameters between the NBCs and SCs. SCs showed significantly higher levels of P. olseni burden, lower condition index, and lower levels of cell-mediated immune functions than those of NBCs.ConclusionsOur study suggests that high P. olseni infection weakens Manila clams’ resistance against thermal stress, causing them to surface. We surmise that the summer mass mortality of Manila clams on the west coast of Korea is caused by the combined effects of high P. olseni infection levels and abnormally high water temperature stress.

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Impacts of Sublethal and Lethal High Temperatures on Clams Exploited in European Fisheries

Cited by 39 publications

References 68 publications

The role of non-natural capital in the co-production of marine ecosystem services

The role of non-natural capital in the co-production of marine ecosystem services

Reproduction Under Stress: Acute Effect of Low Salinities and Heat Waves on Reproductive Cycle of Four Ecologically and Commercially Important Bivalves

High parasite burden increases the surfacing and mortality of the Manila clam (Ruditapes philippinarum) in intertidal sandy mudflats on the west coast of Korea during hot summer

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