Temporal and spatial variation in food availability and meat ratio in a longline mussel farm (Mytilus edulis)

Strohmeier, Tore; Duinker, Arne; Strand, Øivind; Aure, Jan

doi:10.1016/j.aquaculture.2008.01.043

Cited by 66 publications

(52 citation statements)

References 25 publications

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“…Several authors documented the close relationship between mussel growth efficiency and food availability, indicating the growth performance limits in terms of energetic potential of food available (Fréchette and Bourget, 1985;Karayücel and Karayücel, 2000;Karayücel et al, 2003b;Erdemir Yiğin and Tunçer, 2004;Ogilvie et al, 2004;Lemaire et al, 2006;Ozernyurk and Zotin, 2006;Strohmeier et al, 2008). Both general and local environmental parameters influence the growth rate.…”

Section: Introductionmentioning

confidence: 99%

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Karayücel¹,

Çelik²,

Karayücel³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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Mussel culture was practiced in the raft system in Sinop area, Black Sea, from May 2005 to May 2006. One-year old rope grown mussel with a mean length of 40.28±0.51 mm and a mean live weight of 6.06±0.20 g were stocked in nylon socks, and suspended from the raft system. Effects of environmental factors including temperature, salinity, chlorophyll a, seston, particulate inorganic matter and particulate organic matter on some growth parameters were monitored during the experimental period. At the end of the experimental period, the mean mussel shell length was 58.86±2.81 mm, while mean live weigth was 18.53±2.25 g. The growth rate was low during the winter and resumed in March. The monthly distribution of meat yield changed between 16.23 and 23.93% with a mean of 20.55±0.78%. The minimum and maximum meat yield were in April and July, respectively. There was a positive correlation between meat yield and particulate organic matter (P<0.05). The highest value of Specific Growth Rate (SGR) was in the first four months when the mussels were smaller size and food availability was higher. The final production was 7.97±0.18 kg per meter of rope. In the light of these results, mussel culture in the raft system was discussed.Keywords: mussel cultivation, raft system, Mytilus galloprovincialis, Black Sea. Ortalama boyu 40,28±0,51 mm ve ortalama ağırlığı 6,06±0,20 g olan bir yaşındaki midyeler naylon çuvallara doldurularak, sal sisteminden asılan halatlarda büyütülmüştür. Deneme süresince çevresel faktörlerin (sıcaklık, tululuk, klorofil-a, seston, partikül organik madde ve partikül inorganik madde) bazı büyüme parametrelerine etkisi izlenmiştir. Deneme sonunda, midyelerde boy 40,28 ile 71,72 mm arasında değişerek ortalama 58,86±2,81 mm, canlı ağırlığı ise 6,06 g ile 31,89 g arasında dağılım göstererek ortalama 18,53±2,25 g olarak ölçülmüştür. Büyüme oranı kış aylarında düşmüş ve Mart ayında tekrar artmaya başlamıştır. Et veriminin aylık değişimi %16,23 ile %23,93 arasında değişmiş beraber olup ortalama %20,55±0,78 olarak ölçülmüştür. En düşük et verimi değeri Nisan ayında elde edilirken en yüksek değer Temmuz ayında elde edilmiştir. Et verimi ve partikül organik madde arasında pozitif ilişki bulunmuştur (P<0,05). Çalışmada en yüksek spesifik büyüme oranı, midyelerin daha küçük ve besin miktarının daha fazla olduğu ilk dört ayda gerçekleşmiştir. Deneme sonunda yetiştirme halatının bir metresinde elde edilen ürün miktarı 7,97±0,18 kg olarak bulunmuştur. Elde edilen bu bulgular sonucunda sal sisteminde midye yetiştiriciliği tartışılmıştır. Karadeniz'de SinopAnahtar Kelimeler: midye yetiştiriciliği, sal sistemi, Mytilus galloprovincialis, Karadeniz.

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Section: Introductionmentioning

confidence: 99%

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Karayücel¹,

Çelik²,

Karayücel³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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“…It would also be extremely difficult to validate such a metric with field observations given the time and spatial scale involved in its variability (Grant et al 2008, Strohmeier et al 2008. Moreover, SDI estimates are not linked with oyster food requirements.…”

Section: Dynamics Of Organic Sestonmentioning

confidence: 99%

Spatially explicit seston depletion index to optimize shellfish culture

Guyondet¹,

Sonier²,

Comeau³

2013

Aquacult. Environ. Interact.

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Cultivated bivalves rely on natural seston for growth and metabolic processes. Because seston is a limited resource, there is a need to better understand its distribution and fluxes within culture embayments, so farms can be positioned optimally within these dynamic systems. In this study, a simple numerical tool was developed and implemented to address actual management issues related to the positioning of oyster Crassostrea virginica farms in the Richibucto Estuary (eastern Canada). The versatile procedure relied on hydrodynamic modelling and tracer advection−dispersion to reproduce the spatial and temporal dynamics of seston availability. The model identified 3 areas of interest within the estuary, each with unique water renewal rates and seston concentrations. The method also revealed major interactions between the different areas, and proved efficient in quantifying the effects of topographical alterations on seston availability. Our results suggest that such basic modelling tools produce relevant information in a timely manner, and thereby facilitate the necessary dialogue between science advisors, industry stakeholders and resource managers.

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“…4) with farm characteristics (length and width of farm, current velocities, length of longlines) as described in Strohmeier et al (2008) allows us to estimate the amount of nutrients excreted by a mussel farm relative to the amount of nutrients naturally present in the water column (Table 3). The number of longlines (mussel biomass) provided by Strohmeier et al (2008) were standardized to a regular mussel farm, which has ~5 times fewer longlines. In winter (February) when release by mussel cultures is low and ambient nutrient concentrations are high, the impact of mussel farming on the total nutrient pool is insignificant.…”

Section: Interactions Between Suspended Mussel Culture and Its Enviromentioning

confidence: 99%

Seasonal variability in nutrient regeneration by mussel Mytilus edulis rope culture in oligotrophic systems

Jansen¹,

Strand²,

Strohmeier³

et al. 2011

Mar. Ecol. Prog. Ser.

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Blue mussel Mytilus edulis cultures contribute to nutrient cycling in coastal ecosystems. Mussel populations filter particulate nutrients from the water column and inorganic nutrients are regenerated by excretion of metabolic wastes and decomposition of (pseudo-)faeces. The objective of this study was to determine the intra-annual variability in nutrient regeneration by mussel rope cultures in oligotrophic fjord systems. In situ respiration and nutrient uptake and release rates of 1 m mussel ropes were measured using 250 l pelagic chambers. There was a 20-fold difference between winter and summer respiration and nutrient release rates. Inorganic nitrogen release ranged from 50 to 1000 µmol h -1 per meter rope. These variations were mainly related to mussel growth but were also related to changes in water temperature and biofouling biomass (organisms that colonized the mussel ropes). In total 24 genera of fouling organisms were observed, diversity increased over time (ranging from 2 to 12 genera m -1 ), and fouling biomass was mainly characterised by ascidians (max. 37 ± 14 g m -1). However, mussels dominated the culture ropes, representing > 90% of total faunal biomass. The amount of organic material associated with the ropes was stable (6.9 ± 0.3 g m -1). At the scale of one mussel farm, nutrient regeneration by mussel rope cultures increased inorganic nitrogen concentrations by 20% and inorganic phosphorus concentrations by 5% during summer conditions. During winter, there was no significant effect of mussel cultures on the inorganic nutrient pools. Nutrient regeneration by mussel cultures also affected stoichiometry as nutrients were excreted in dissimilar proportions (nitrogen > phosphate > silicate). The increased nutrient availability may contribute to primary production, especially in nutrient-limited (oligotrophic) fjord ecosystems. However, fjordscale effects are largely dependent on hydrographic conditions of the fjord system.

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Temporal and spatial variation in food availability and meat ratio in a longline mussel farm (Mytilus edulis)

Cited by 66 publications

References 25 publications

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Spatially explicit seston depletion index to optimize shellfish culture

Seasonal variability in nutrient regeneration by mussel Mytilus edulis rope culture in oligotrophic systems

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