scholarly journals Low incidence of plastic ingestion among three fish species significant for human consumption on the island of Newfoundland, Canada

2018 ◽  
Author(s):  
Max Liboiron ◽  
Jessica Melvin ◽  
Natalie Richárd ◽  
Jacquelyn Saturno ◽  
Justine Ammendolia ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Fish Species ◽  
Atlantic Cod ◽  
Ingestion Rate ◽  
Human Consumption ◽  
List Type ◽  
Frequency Of Occurrence ◽  
Northwest Atlantic ◽  
Ingestion Rates ◽  
Food Fish

AbstractThis study reports the first baselines of plastic ingestion for three fish species that are common food fish in Newfoundland, Canada. Species collections occurred between 2015-2016 for Atlantic cod (Gadus morhua), Atlantic salmon (Salmo salar), and capelin (Mallotus villosus). The frequency of occurrence (%FO) of plastic ingestion for both spawning Atlantic salmon (n=69) and capelin (n=350) was 0%. Of the 1,010 Atlantic cod collected over two years, 17 individuals had ingested plastics, a %FO of 1.68%. This is the only multi-year investigation of plastic ingestion in Atlantic cod for the Northwest Atlantic, and the first for capelin and salmon in the region. Considering the ecological, economic, and cultural importance of these fish species, this study is the beginning of a longitudinal study of plastic ingestion to detect future changes in contamination levels.HighlightsIngestion rate (%FO) of plastics in Atlantic cod is 1.68%Ingestion rate (%FO) of plastics in Atlantic salmon and capelin is 0%First study of plastic ingestion rates in Atlantic salmon and capelinMulti-year baseline of plastic ingestion in Atlantic cod in the Northwest AtlanticPlastic ingestion rates for three food fish species in Newfoundland, Canada, are lowTermsFrequency of occurrence (%FO): the number of individuals in a population or group that have ingested plastics (not indicative of the number of particles ingested per individual)

scholarly journals Low incidence of plastic ingestion among three fish species significant for human consumption on the island of Newfoundland, Canada

2019 ◽  
Author(s):  
Max Liboiron
Keyword(s):  
Atlantic Salmon ◽  
Fish Species ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Human Consumption ◽  
Cultural Importance ◽  
Capelin Mallotus Villosus ◽  
Food Fish ◽  
Low Incidence ◽  
Contamination Levels

This study reports the first baselines of plastic ingestion for three fish species that are common commercial and sustenance food fish in Newfoundland. Species collections occurred between 2015 and 2016 for Atlantic cod (Gadus morhua), Atlantic salmon (Salmo salar), and capelin (Mallotus villosus). The frequency of occurrence (%FO) of plastic ingestion for both Atlantic salmon (n = 69) and capelin (n = 350) was 0%. Of the 1010 Atlantic cod individuals collected over two years, 17 individuals had ingested plastics, a %FO of 1.68%. This is the only multi-year investigation of plastic ingestion in Atlantic cod for the Northwest Atlantic, and the first baseline of plastic ingestion in Atlantic salmon and capelin on the island of Newfoundland. Considering the ecological, economic, and cultural importance of these fish species, this study is the beginning of a longitudinal study of plastic ingestion to detect any future changes in contamination levels.

scholarly journals Low plastic ingestion rate in Atlantic Cod (Gadus morhua) from Newfoundland destined for human consumption collected through citizen science methods

2016 ◽  
Author(s):  
Max Liboiron ◽  
France Liboiron ◽  
Emily Wells ◽  
Natalie Richárd ◽  
Alexander Zahara ◽  
...  
Keyword(s):  
Citizen Science ◽  
Prevalence Rate ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Ingestion Rate ◽  
Human Consumption ◽  
Science Methods ◽  
List Type ◽  
The North ◽  
Wide Range

AbstractMarine microplastics are a contaminant of concern because their small size allows ingestion by a wide range of marine life. Using citizen science during the Newfoundland recreational cod fishery, we sampled 205 Atlantic cod (Gadus morhua) destined for human consumption and found that 5 had eaten plastic, an ingestion prevalence rate of 2.4%. This ingestion rate for Atlantic cod is the second lowest recorded rate in the reviewed published literature (the lowest is 1.4%), and the lowest for any fish in the North Atlantic. This is the first report for plastic ingestion in fish in Newfoundland, Canada, a province dependent on fish for sustenance and livelihoods.Highlights (3–5 points, 85 char max including spaces)Plastic ingestion rate of 2.4% for Atlantic Cod (n=205)First recorded baseline for fish in Newfoundland, CanadaThis plastic ingestion prevalence rate is among the lowest recorded to dateUsed citizen science to collect GI tracts from fish destined for human consumption

scholarly journals Low plastic ingestion rate in Atlantic cod (Gadus morhua) from Newfoundland destined for human consumption collected through citizen science methods

2016 ◽  
Vol 113 (1-2) ◽  
pp. 428-437 ◽  
Author(s):  
Max Liboiron ◽  
France Liboiron ◽  
Emily Wells ◽  
Natalie Richárd ◽  
Alexander Zahara ◽  
...  
Keyword(s):  
Citizen Science ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Ingestion Rate ◽  
Human Consumption ◽  
Science Methods

scholarly journals The concentration of mercury in organs of Whipfin silver biddy (Gerres filamentosus Cuv.) and Flathead grey mullet (Mugil cephalus L.) in coastal central Vietnam

2018 ◽  
Author(s):  
Thiep Vo Van ◽  
Łukasz J. Binkowski ◽  
Robert Stawarz
Keyword(s):  
Fish Species ◽  
Absorption Spectrometry ◽  
Toxic Element ◽  
Mugil Cephalus ◽  
Human Consumption ◽  
Grey Mullet ◽  
Maximum Permissible Level ◽  
Central Vietnam ◽  
Cold Vapor Atomic Absorption ◽  
Food Fish

The concentration of mercury (Hg) in fish species has direct consequences to health of man and ecosystem. Thus, in this paper, the accumulation of Hg in gills, liver, and muscle of the two fish species (Whipfin silver biddy – Gerres filamentosus and Flathead grey mullet – Mugil cephalus) were measured by cold vapor atomic absorption spectrometry. The fish specimens were collected from local markets and direct fishing with the help of fishermen over the period from July to September 2017 in coastal Vietnam. Differences in the total Hg were found both between two species and organs. The concentration of Hg in all organs investigated of Whipfin silver biddy was higher than of Flathead grey mullet (p < 0.05). The content of Hg in the muscles of Whipfin silver biddy was higher than in liver and gills (p < 0.05), 0.460, 0.245, 0.077 µg g-1 w.w., respectively. Liver of Flathead grey mullet had more Hg accumulated than muscle and gills (0.195, 0.097, 0.046 µg g-1 w.w., respectively). The results revealed that Hg concentrations in Flathead grey mullet did not exceed food fish safety limits established for human consumption while concentration of this toxic element in muscles of Whipin silver biddy almost reached the maximum permissible level.

scholarly journals Cadmium, Lead, Copper, Zinc, and Iron Concentration Patterns in Three Marine Fish Species from Two Different Mining Sites inside the Gulf of California, Mexico

2021 ◽  
Vol 18 (2) ◽  
pp. 844
Author(s):  
Elisa Serviere-Zaragoza ◽  
Salvador E. Lluch-Cota ◽  
Alejandra Mazariegos-Villarreal ◽  
Eduardo F. Balart ◽  
Hugo Valencia-Valdez ◽  
...  
Keyword(s):  
Fish Species ◽  
Gulf Of California ◽  
Anthropogenic Activities ◽  
Iron Concentration ◽  
Dry Weight ◽  
Human Consumption ◽  
Metal Concentrations ◽  
Mining Sites ◽  
Copper Zinc ◽  
Cadmium Lead

In the Gulf of California; mineral deposits have contributed to high metal contents in coastal environments. This study examined cadmium; lead; copper; zinc; and iron contents in three fish species; Kyphosus vaigiensis (herbivore), Stegastes rectifraenum (omnivore), and Balistes polylepis (carnivore) at two mining sites. Metal concentrations were analyzed by atomic absorption spectrophotometry and stable nitrogen and carbon isotopes were estimated using mass spectrophotometry. Also, we assessed the risk to human health from the consumption of these three species based on permissible limits; although only two of them (Kyphosus and Balistes) are consumed as food. Metal concentrations differed among fish species; except for iron. The highest concentrations of metals were not always recorded in the species at the highest trophic level; i.e., Balistes. The highest concentrations (dry weight) recorded were cadmium (0.21 ± 0.03 µg g−1) and lead (1.67 ± 0.26 µg g−1), in S. rectifraenum; copper (1.60 ± 0.49 µg g−1) and zinc (67.30 ± 8.79 µg g−1), in B. polylepis; and iron (27.06 ± 2.58 µg g−1), in K. vaigiensis. Our findings show that each element accumulates differently in particular marine organisms; depending on the physiology of the species and the biogeochemistry of its habitat; which in turn is affected by the anthropogenic activities in adjacent areas. No risk of heavy metals toxicity is expected from the human consumption of the species and sites studied

The Effect of Temperature and Food Concentration On Ingestion Rates of Quinqueloculina Seminula On the Diatom Nitzschia Closterium

2019 ◽  
Vol 49 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Yanli Lei ◽  
Chengchun Li ◽  
Tiegang Li ◽  
Zhimin Jian
Keyword(s):  
Food Availability ◽  
Ingestion Rate ◽  
Food Concentration ◽  
Laboratory Culture ◽  
Effect Of Temperature ◽  
Clearance Rates ◽  
Organic Detritus ◽  
Local Conditions ◽  
Ingestion Rates ◽  
Nitzschia Closterium

Abstract The majority of sediment-dwelling foraminifera are thought to be deposit feeders. They use their reticulopodia to gather sediment with associated algae, organic detritus, and bacteria. Uptake of diatoms by foraminifera have been observed but rarely quantified. We measured the clearance (gathering) rate and ingestion rate of diatoms by the common benthic foraminifer Quinqueloculina seminula using Nitzschia closterium as prey under laboratory culture conditions. Grazing experiments were performed to evaluate the effects of temperature (at 12, 15, 18, 21, and 24°C) and food availability (10 to 800 cells mm−2) on uptake rates of diatoms. The clearance rates, estimated from the disappearance of food items, were variable (0.59–4.4 mm2 foram−1 h−1) and did not show a clear relationship with food availability. The maximum clearance rates increased from 1.80 ± 0.21 to 2.69 ± 0.32 mm2 foram−1 h−1 when temperature increased from 12 to 18°C and decreased to 2.28 ± 0.25 mm2 foram−1 h−1 at 24°C. Ingestion rates varied from 1.0 to 43 × 103 diatoms foram−1 h−1, following a hyperbolic response to food concentrations at all experimental temperatures. The maximum individual ingestion rates increased from 842 ± 180 to 1648 ± 480 (mean ± SE) cells foram−1 h−1 and then decreased to 316 ± 54 cells foram−1 h−1 as temperature increased from 12 to 24°C. Experimental results revealed that 12–18°C was the optimal temperature range for Q. seminula feeding for specimens adapted to local conditions. Our study indicates that Q. seminula plays an ecological role by feeding upon benthic diatoms in marine benthic ecosystems.

scholarly journals Diversity of Bacteria and Fungi Associated with Freshwater Fishes from Mijawal River, Nasarawa, Nigeria

2020 ◽  
Vol 24 (6) ◽  
pp. 1085-2020
Author(s):  
K.M. Adamu ◽  
H. Muhammad ◽  
S.U. Ahmad ◽  
M.M. Ahmad ◽  
A.M. Yakubu
Keyword(s):  
Fish Species ◽  
Terrestrial Ecosystems ◽  
Freshwater Fishes ◽  
Frequency Of Occurrence ◽  
Salmonella Spp ◽  
Tilapia Zillii ◽  
Fish Samples ◽  
Bacteria And Fungi ◽  
Rhizopus Sp ◽  
Mormyrus Rume

Understudying the presence of bacteria and fungi population on freshwater fishes, provides the knowledge and understanding of their diversity and potential roles they may play in the health of the aquatic and terrestrial ecosystems. The present study was conducted to evaluate the diversity of bacteria and fungi species of identified fish samples from River Mijawal, Nasarawa State. The fishes were sampled from the only landing for three months (October to December, 2019) for this study. During the sampling periods, thirteen (13) different fish species were identified; they were  swabbed with sterilized swab stick from the skin surface for bacteria and fungi identification. The Dominant fish species were Tilapia zillii, Labeo senegalensis, Mormyrus rume and Mormyrus tapines. The total number of thirteen (13) bacterial and five (5) fungi species were isolated and  identified. Eight (8) of the bacteria isolates, were gram negative bacteria (Pseudomonas sp, Aeromonas sp, Serratia mercescenes, Proteus sp, Salmonella spp, Escherichia coli, Klebsiella sp, and Enterobacter sp.); whilst the other five (5) were gram positive bacteria (Bacillus sp, Micrococcus sp, Staphylococcus sp, Enterococcus sp and Listeria monocytogenes).The five isolated fungi species were Aspergillus niger, Rhizopus sp, Penicillium  sp, Trichoderma viridae and Geotrichum candidum. The frequency of occurrence of the isolated bacteria indicated that Staphylococcus sp had the highest frequency of occurrence (16.67%) while Serratia mercescens had the least occurrence (2.78%). The highest number of occurrence of the isolated fungi species was observed in Rhizopus sp while the least was recorded in Geotricum candidum. It was observed that Tilapia zillii and  Mormyrus rume had the most frequent bacteria and fungi isolates. It can therefore be deduced from the results that fish samples identified from River Mijawal has high bacteria and fungi diversity that may be pathogenic to man. The occurrence of these microbes may be attributed of human  and animal faeces in the River  Keywords: Freshwater fishes, Microbes, River Mijawal, Nasarawa  

scholarly journals Interactions Between the Kleptoplastidic Dinoflagellate Shimiella gracilenta and Several Common Heterotrophic Protists

2021 ◽  
Vol 8 ◽  
Author(s):  
Sang Ah Park ◽  
Hae Jin Jeong ◽  
Jin Hee Ok ◽  
Hee Chang Kang ◽  
Ji Hyun You ◽  
...  
Keyword(s):  
Growth Rates ◽  
Ingestion Rate ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Prey Concentration ◽  
Ingestion Rates ◽  
Oxyrrhis Marina ◽  
Planktonic Food ◽  
Moderate Growth ◽  
Algal Prey

The newly described dinoflagellate, Shimiella gracilenta, is known to survive for approximately 1 month on the plastids of ingested prey cells during starvation, indicating kleptoplastidy. To understand the population dynamics of this dinoflagellate in marine planktonic food webs, its growth and mortality rate due to predation should be assessed. Thus, we investigated the feeding occurrence of eight common heterotrophic protists on S. gracilenta. We also determined the growth and ingestion rates of Oxyrrhis marina and the naked ciliate, Rimostrombidium sp. on S. gracilenta as a function of the prey concentration. The common heterotrophic dinoflagellates (HTDs) Gyrodinium dominans, O. marina, and Pfiesteria piscicida and a naked ciliate Rimostrombidium sp. were able to feed on S. gracilenta; whereas the HTDs Aduncodinium glandula, Gyrodinium jinhaense, Oblea rotunda, and Polykrikos kofoidii were not. Shimiella gracilenta supported positive growth of O. marina and Rimostrombidium sp. but did not support that of G. dominans and P. piscicida. With increasing prey concentrations, the growth and ingestion rates of O. marina and Rimostrombidium sp. on S. gracilenta increased and became saturated. The maximum growth rates of O. marina and Rimostrombidium sp. on S. gracilenta were 0.645 and 0.903 day−1, respectively. Furthermore, the maximum ingestion rates of O. marina and Rimostrombidium sp. on S. gracilenta were 0.11 ng C predator day−1 (1.6 cells predator−1 day−1) and 35 ng C predator day−1 (500 cells predator−1 day−1), respectively. The maximum ingestion rate of O. marina on S. gracilenta was lower than that on any other algal prey reported to date, although its maximum growth rate was moderate. In conclusion, S. gracilenta had only a few common heterotrophic protist predators but could support moderate growth rates of the predators. Thus, S. gracilenta may not be a common prey species for diverse heterotrophic protists but may be a suitable prey for a few heterotrophic protists.

scholarly journals Effect of microalgal diets on filtration and ingestion rates of the rotifer Brachionus plicatilis

2016 ◽  
Vol 63 (3) ◽  
Author(s):  
Jayasree Loka ◽  
K.K. Philipose ◽  
S.M. Sonali
Keyword(s):  
Filtration Rate ◽  
Brachionus Plicatilis ◽  
Ingestion Rate ◽  
Initial Density ◽  
Isochrysis Galbana ◽  
Nannochloropsis Oculata ◽  
Ingestion Rates ◽  
Significant Difference ◽  
Rotifer Brachionus Plicatilis ◽  
Chaetoceros Calcitrans

Effect of marine microalgal diet on filtration and ingestion rates of Brachionus plicatilis was studied. Marine microalgae viz., Nannochloropsis oculata, Isochrysis galbana, Chaetoceros calcitrans and a combination of N. oculata and I. galbana (Nanno+Iso) at different cell concentrations were selected for the experiment and triplicates were maintained for each feed. Significant difference (p<0.05) was observed in the filtration and ingestion rates of B. plicatilis, between the treatments. Peak filtration rate of 12.2x10-5 cells ml-1 ind-1 min-1 was recorded in B. plicatilis fed with Nanno+Iso, followed by I. galbana. Ingestion rate was found to be significantly high (p<0.05) for those fed with C. calcitrans, followed by Nanno+Iso. Filtration rate was significantly high (p<0.05) in rotifers stocked at an initial density of 50 nos. ml-1 fed with Nanno+Iso. The results indicated that a combination of Nanno and Iso is the best suitable microalgal diet for rotifer with peak filtration (12.2x10-5cells ml-1 ind-1 min-1) and ingestion (5.4x10-3 cells ml-1 ind-1 min-1) rates during the first 60 min.

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