High mortality and poor growth of green mussels, Perna viridis, in high chlorophyll-a environment

Soon, Tan Kar; Denil, Delta Jenetty; Ransangan, Julian

doi:10.1007/s12601-016-0005-0

Cited by 26 publications

(8 citation statements)

References 34 publications

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“…a concentrations ( Fig. 6A ), supporting previous studies (Clausen & Riisgård, 1996; Riisgård, Kittner & Seerup, 2003 ; Soon, Denil & Ransangan, 2016 ). Clearance rates in mesocosm experiments were significantly lower than under laboratory conditions, most likely because mussels under laboratory conditions were fed a Rhodomonas sp.…”

Section: Introductionsupporting

confidence: 91%

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Ritzenhofen

Buer

Gyraite

et al. 2021

PeerJ

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The EU-water framework directive (WFD) focuses on nutrient reductions to return coastal waters to the good ecological status. As of today, many coastal waters have reached a steady state of insufficient water quality due to continuous external nutrient inputs and internal loadings. This study focuses first on the current environmental status of mesohaline inner coastal waters to illustrate their needs of internal measures to reach demanded nutrient reductions and secondly, if mussel cultivation can be a suitable strategy to improve water quality. Therefore, nitrogen, phosphorus, chlorophyll a, and Secchi depth of nine mesohaline inner coastal waters in north east Germany were analyzed from 1990 to 2018. Two pilot mussel farms were used to evaluate their effectiveness as a mitigation measure and to estimate potential environmental risks, including the interactions with pathogenic vibrio bacteria. Further, estimated production and mitigation potential were used to assess economic profitability based on the sale of small sized mussels for animal feed and a compensation for nutrient mitigation. The compensation costs were derived from nutrient removal costs of a waste water treatment plant (WWTP). Results show that currently all nine water bodies do not reach the nutrient thresholds demanded by the WFD. However, coastal waters differ in nutrient pollution, indicating that some can reach the desired threshold values if internal measures are applied. The mitigation potential of mussel cultivation depends on the amount of biomass that is cultivated and harvested. However, since mussel growth is closely coupled to the salinity level, mussel cultivation in low saline environments leads to lower biomass production and inevitably to larger cultivation areas. If 50% of the case study area Greifswald Bay was covered with mussel farms the resulting nitrogen reduction would increase Secchi depth by 7.8 cm. However, high chlorophyll a values can hamper clearance rates (<20 mg m−3 = 0.43 l h−1 dry weight g−1) and therefore the mitigation potential. Also, the risk of mussel stock loss due to high summer water temperatures might affect the mitigation potential. The pilot farms had no significant effect on the total organic content of sediments beneath. However, increased values of Vibrio spp. in bio deposits within the pilot farm (1.43 106 ± 1.10 106CFU 100 ml−1 (reference site: 1.04 106 ± 1.45 106 CFU 100 ml−1) were measured with sediment traps. Hence, mussel farms might act as a sink for Vibrio spp. in systems with already high vibrio concentrations. However, more research is required to investigate the risks of Vibrio occurrence coupled to mussel farming. The economic model showed that mussel cultivation in environments below 12 PSU cannot be economic at current market prices for small size mussels and compensations based on nutrient removal cost of WWTPs.

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Section: Introductionsupporting

confidence: 91%

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Ritzenhofen

Buer

Gyraite

et al. 2021

PeerJ

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“…Similar results, noting the existence of two spawning periods of which one is in the winter, were recorded by Shafee (1989) for Perna picta (Morocco) and Mohd-Taib et al, (2016) for Pernaviridis (Malaysia). Autumn spawning was reported by Zaouali (1973) in Tunisia, by Zardi et al, (2007) on the south coast of South Africa for P. perna and by Soon et al, (2016) for P. viridis in Malaysia.…”

Section: Discussionmentioning

confidence: 88%

“…Rajagopal et al, (1998) and Alfaro (2006) demonstrated that there is a strong correlation between the availability of food and the density of green mussels; but the chlorophyll-a measurement is not enough on its own to show the exact significance of food availability as a factor in the growth of bivalves, given their selective feeding behavior (Ren et al, 2000;Rouillon and Navarro, 2003). This was demonstrated and confirmed by Mohd-Taib et al, (2016), Garcia et al, (2016 and Soon et al, (2016).…”

Section: Discussionmentioning

confidence: 96%

“…On this subject, Arnaud (1966) noted that only a salinity lower than 15 g/L has an effect on the growth of mussels, linear growth in particular. Soon et al, (2016) reported for the Perna viridis mussel that a low condition index corresponded to relatively lower salinity. Salinity has been positively associated with the filtration rate (Rajesh et al, 2001) and condition index (Navarro, 1988) of marine bivalves.…”

Section: Discussionmentioning

confidence: 98%

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Study of weight gain and reproduction in the Perna perna mussel using a standard animal

2017

Int. J. Biosci.

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This study aims to establish a link between weight variation of the brown mussel Perna perna, condition index and the environmental parameters. In order to eliminate the effect of growth on the weight variation, a standard sized animal of about 60 mm, was used. Random sampling of mussels and seawater was conducted once a month, from two sites in the Gulf of Annaba (Algeria), over an annual cycle. Growth parameters were determined by reference to shell length, fresh and dry mass tissue weight, as well as shell and total weight. Temperature, dissolved oxygen, salinity, chlorophyll a and suspended matter were recorded at each site. The results show that, the CI variation in the SI is a function of weight, which is itself a function of the sexual stage as well as the availability of food (especially chlorophyll-a and suspended matter). The period of the maximum of gain weight corresponds with the increases in the condition index and was associated with high concentrations of chlorophyll-a and suspended matter, recorded during the spring period. This is supported by statistical analysis showing a significant correlation. Perna perna has two spawning periods, one in the autumn and one in winter. The knowledge of the reproductive cycle and environmental parameters that could influence them may constitute a basic data, necessary not only for any commercial exploitation of this mussel species, but for its use as bio-monitoring as well. Such monitoring assures a qualitative analysis of shellfish aquaculture products and helps to choose mussel cultivation sites.

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“…Currently, this clam is usually collected from the mangrove swamps of Marudu Bay by fisherman and sold in local wet markets. However, continuous harvesting of this clam is seen threatening the sustainability of the natural stock of the species [4]. Moreover, the demand for such seafood is expected to increase in the near future as the tourism industry in Sabah is becomingly popular to both international and local tourists [5].…”

Section: Introductionmentioning

confidence: 99%

Occurrence and Distribution of Marsh Clam, <em>Polymesoda</em> spp. in Marudu Bay, Sabah, Malaysia

Ransangan¹,

Soon²

2018

OJMS

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Marudu Bay is part of the Tun Mustapha Marine Park, the largest marine protected area within the Malaysian region of the Coral Triangle Initiative. The bay is known for its diversed fisheries resources including bivalves. Although some of these bivalve species are commercially important, their occurrence, distribution and stock status in the bay are not well documented. Hence, the current study was conducted to determine the occurrence, distribution and the stock status of marsh clam, Polymerasoda spp. in the mangrove swamp situated at the southernmost of the Marudu Bay. Samplings were carried out at the mangrove swamps which covered an area of 500 sequare meter per sampling site. Two marsh clams species, Polymesoda erosa and P. expansa were found to inhabit the sampling sites. In general, juvenile marsh clams were noticed to dominate the seaward mangrove swamp, whereas the high tidal regions were dominated by adults. The current study also suggested a link in the distribution and the morphometric measurements of the marsh clams with the sediment grain size.

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High mortality and poor growth of green mussels, Perna viridis, in high chlorophyll-a environment

Cited by 26 publications

References 34 publications

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Study of weight gain and reproduction in the Perna perna mussel using a standard animal

Occurrence and Distribution of Marsh Clam, <em>Polymesoda</em> spp. in Marudu Bay, Sabah, Malaysia

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High mortality and poor growth of green mussels, Perna viridis, in high chlorophyll-a environment

Cited by 26 publications

References 34 publications

­Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

­Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Study of weight gain and reproduction in the Perna perna mussel using a standard animal

Occurrence and Distribution of Marsh Clam, &lt;em&gt;Polymesoda&lt;/em&gt; spp. in Marudu Bay, Sabah, Malaysia

Contact Info

Product

Resources

About

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Blue mussel (Mytilus spp.) cultivation in mesohaline eutrophied inner coastal waters: mitigation potential, threats and cost effectiveness

Occurrence and Distribution of Marsh Clam, <em>Polymesoda</em> spp. in Marudu Bay, Sabah, Malaysia