Abstract In general, anchovy is marketed in dried form in almost all traditional markets. The quality of marketed fish changes based on space and time. The purpose of this research is to determine ...the quality of dry salted anchovy ( Stolephorus sp .) based on organoleptic tests and formalin content at the Sawojajar market. The method used is a case study. Samples were taken randomly at the Sawojajar market, then tested at the Cirebon KIPM Station laboratory. Data analysis was carried out by comparing the results of formalin and organoleptic tests according to SNI 2346-2015 on dried salted anchovy. The results showed that all samples did not contain formalin and the organoleptic test showed that the value in sample I was 5 in II and III, the same value was 6. The organoleptic value of the three samples of salted dried anchovy was still below the SNI threshold, while the organoleptic value of salted dried anchovies was 7 (SNI 23462015).
A fast automatic new method, the "spray technique", for the separation of fish eggs from plankton samples has been developed; each egg-sorting procedure requires less than 3 min (removal of zero up ...to hundreds of eggs). A targeted accuracy can be achieved by repeating the procedure. The spray method can be easily applied onboard research vessels and it appears to cope well with different plankton compositions. Tests suggest that the method is 25, 60 and 110 times faster than the traditional manual method when using samples with low, medium and high plankton content. Sorted egg fractions contain less contamination by plankton particles than with the manual method. This new method is much less prone to human error and can be standardised. However, as plankton samples vary, it is crucial to estimate regularly the accuracy of the sorting. The method should only be used with standard operating procedures and pre-determined accuracy targets. Accuracy can be estimated afterwards by sorting thoroughly; checking whether any eggs had been left.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
5.
Anchovy population expansion in the North Sea Petitgas, Pierre; Alheit, Jürgen; Peck, Myron A. ...
Marine ecology. Progress series (Halstenbek),
01/2012, Volume:
444
Journal Article
Peer reviewed
Open access
The abundance and spatial occupation of European anchovyEngraulis encrasicolushave increased in the North Sea since the mid-1990s. We use a cross-disciplinary approach combining genetics, transport ...modelling, survey time series analyses and physical oceanographic modelling to investigate 3 hypotheses on the reasons for this change. Evidence from connectivity studies suggests that the population of North Sea anchovy is separate from that in the Bay of Biscay. The recruitment pulses observed in survey data fit a life cycle which includes spawning in early summer and larval development in late summer. This also supports the concept of population expansion originating from local remnant population(s). In terms of growth physiology, suitable thermal windows have expanded, making conditions more favourable for life cycle closure and population persistence/productivity. In addition to the increased frequency of warm summers, which favour larvae and juvenile growth, the decrease in the number of severe winters is also likely to improve overwinter survival. Overall, the evidence supports the hypothesis that the increase in anchovy abundance originated from the improved productivity of existing populations. This increase was associated with an expansion in thermal habitats and is probably not due to a northward shift in the distribution of southern conspecifics.
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•We present a global study of small pelagic fish body condition in the Mediterranean.•Fish body condition strongly declined during last decades in almost all studied areas.•Body condition did not ...vary in synchrony between areas in the Mediterranean Sea.•Well-marked environmental differences between sub-regions were highlighted.•This decline in the condition may have negative effects on ecosystems and fisheries.
Small pelagic fish are among the most ecologically and economically important marine fish species and are characterized by large fluctuations all over the world. In the Mediterranean Sea, low catches and biomass of anchovies and sardines have been described in some areas during the last decade, resulting in important fisheries crises. Therefore, we studied anchovy and sardine body condition variability, a key index of population health and its response to environmental and anthropogenic changes. Wide temporal and spatial patterns were investigated by analyzing separately data from scientific surveys and fisheries in eight Mediterranean areas between 1975 and 2015.
Results showed that anchovy and sardine body condition as well as maximum size in some areas sharply decreased in most Mediterranean areas along years (except in the Northern Alboran Sea). Despite this general pattern, well-marked environmental differences between sub-regions were highlighted by several analyses and variations in body condition were not found to be homogeneous over all the Mediterranean Sea. Further, other analyses revealed that except for the Adriatic where major changes towards a lower body condition were concomitant with a decrease in river runoffs and chl-a concentration, no concomitant environmental regime shift was detected in other areas.
Together, these analyses highlighted the current poor body condition of almost all small pelagic fish populations in the Mediterranean. Yet, global environmental indices could not explain the observed changes and the general decrease in condition might more likely come from regional environmental and/or anthropogenic (fishing) effects. A prolonged state of poor fish body condition, together with an observed reduced size and early age-at-maturity may have strong ecological, economic and social consequences all around the Mediterranean Sea.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
Summary
Hair‐fin anchovy (Setipinna tenuifilis) is an economically important fish distributed in the West Indian Ocean and the Northwest Pacific Ocean. In this study, 154 individuals in eight ...populations of S. tenuifilis were sequenced and 850 million raw reads were obtained using restriction site‐associated DNA sequencing (RAD‐seq). First, we identified 14 012 044 hypothetical SNP markers. A dataset of 199 903 high‐quality SNPs was collected after further screening. These SNPs have a strong ability to test the genetic diversity between the eight populations. The differentiation and genetic law between samples were explored based on SNPs in populations of S. tenuifilis. The results of this study will provide data for protecting the genetic resources of the species.
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Cereals and their derived products are important dietary sources for humans but are mostly deficient in protein and several micronutrients. To increase the nutrient content of rice and wheat ...flour-based recipes, nutrient-dense powders of the small pelagic fish species Anchovy (Engraulis encrasicolus) and Atlantic bumper (Chloroscombrus chrysurus) were used to enrich the high carbohydrate content mostly found in cereals. Sensory evaluation by 60 panelists showed that the enrichment of recipes with fish powder was acceptable. Recipes with dried anchovy showed higher sensory acceptance than recipes fortified with dried Atlantic bumper. Nutritional analyses showed that several of the tested recipes can be regarded as significant sources of micronutrients (vitamin A, D and B12, iodine and calcium) and the omega-3 fatty acids eicosapentaenoic acid and docosahexaenoic acid. The actual analysed nutrient content of the test diets differed from the estimated nutrient content of the recipes by using values from the West-African food composition table. For vitamin A, analysed values were generally higher than the estimated values, indicating that the values in the food composition table are not sufficient to estimate the nutritional fortification with powdered small fish. In conclusion, the fortified foods prepared according to the tested recipes were accepted by sensory panelists and can be regarded as significant source of several essential nutrients. Food composition tables should be revised to enable a better estimation of the nutritional value of fortified diets for the combat of malnutrition.
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•Nutrient-dense powders of small pelagic fish species were added to rice and wheat flour-based recipes.•Sensory evaluation showed that the enrichment of recipes with fish powder was acceptable.•Cereal-based foods enriched with small fish powder are significant sources of several essential vitamins and minerals.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Identification of the potential habitat of European anchovy (Engraulis encrasicolus) at different life stages in relation to environmental conditions is an interesting subject from both ecological ...and management points of view. For this purpose, acoustic data from different seasons and different parts of the Mediterranean Sea along with satellite environmental and bathymetry data were modelled using generalized additive models. Similarly, egg distribution data from summer ichthyoplankton surveys were used to model potential spawning habitat. Selected models were used to produce maps presenting the probability of anchovy presence (adults, juveniles and eggs) in the entire Mediterranean basin, as a measure of habitat adequacy. Bottom depth and sea surface chlorophyll concentration were the variables found important in all models. Potential anchovy habitats were located over the continental shelf for all life stages examined. An expansion of the potential habitat from the peak spawning (early summer) to the late spawning season (early autumn) was observed. However, the most suitable areas for the presence of anchovy spawners seem to maintain the same size between seasons. Potential juvenile habitats were associated with highly productive inshore waters, being less extended and closer to coast during winter than late autumn. Potential spawning habitat in June and July based on ichthyoplankton surveys overlapped but were wider in extent compared with adult potential habitat from acoustics in the same season. Similarities and dissimilarities between the anchovy habitats as well as comparisons with sardine habitats in the oligotrophic Mediterranean Sea and other ecosystems with higher productivity are discussed.
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Research on the design of an anchovy filter machine was carried out with the aim of designing a fish-size ring machine using a capacity dynamo and a dimmer as a regulator of movement speed and fish. ...The design is made with specifications for the size of iron as a framework, with a height of 745 mm, a width of 430 mm, and a length of 800 mm. There are two sizes of fish measuring at the top and 1/6 inch at the bottom. The engine uses a 2200 Volt dynamo and a dimmer. From the results of the dynamo rotation speed test, the rotational speed produced by pulley 1 is greater than pulley 2. The difference in rotational speed on pulley one and pulley two is caused by a change in the transmission system with the addition of a fan belt between pulley 1 and pulley 2. The rotation produced by the rotation of pulley 1 is a rotation that is directly connected to the dynamo so that the number of rotations will be greater. While the rotation produced by pulley 2 is the rotation of the transmission system. Puli 2 will rotate to move the axle, which is connected to the Pillow Block. Measurement of dynamo flow and voltage is carried out to see how much rotation mode on the dimmer will be used to speed up or slow down the rotation of the dynamo. The small size of the dynamo that is used causes the dimmer mode that is used to start at mode 7 on a scale of 1-9 modes contained in the dimmer.
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