Elsewhere around the world culturing methods have been as varied as fashion and local materials have allowed. The Romans cultured the shellfish on sticks and ropes suspended from elevated walkways and gantries. They had an especially high regard for the oyster and sought out naturally bountiful growing areas and different local strains or species as they expanded the Empire. Oysters have been cultured for at least 2000 years, with the earliest records of culturing techniques being those of the Romans. In addition to the essential proteins in the meat, fat oysters have stores of glycogen a very good energy food for people living before the days of cereal crops and other cultivated carbohydrate sources. Oysters would have been a most valuable food resource for primitive hunters and gatherers. Many of these middens are huge one in Ireland measured 300m square and 15m high - a vast rubbish dump containing oysters, cockles, mussels and periwinkles, and showing that shoreline food has long been a staple of humanity. In midden material from all around the world Denmark, Ireland, east and west coasts of America, Japan and Australia - oysters feature prominently and are often accompanied by the primitive tools needed to open the shellfish. Neither cutlery, nor even humans, were around in those Miocene times, but when humans did eventually arrive on the scene it is clear that they were partial to oysters from their earliest days. Some of these ancient specimens would make an oyster glutton drool and even call for a knife and fork, for the shells are the size of bread-and-butter plates. Just a few kilometres from the Mahurangi Estuary (one of New Zealand’s prime oyster culturing areas), fossiliferous rocks at Mathesons Bay are packed with oysters. Fossilised oyster shells are a common feature of the exposed outcrops of mudstone, sandstone and conglomerate found along the northeast coast - some date back 20 million years. ![]() Oysters have been flourishing in New Zealand’s coastal waters for millions of years. The US market's demand for Vietnamese shrimp imports may improve after the first quarter of 2023, until around May when inventories are reduced and the economic situation is more positive.Written by John Walsby Photographed by Arno Gasteiger, Kennedy Warne and Roger Grace According to data from the National Oceanic and Atmospheric Administration (NOAA), US shrimp imports in December 2022 hit a 10-year low.Īccording to information from US importers, processors and wholesalers in this market are likely to buy more peeled and deveined shrimp instead of headless shell-on because this item is easier to transport - Lighter weight to reduce shipping costs and shorten processing time. Shrimp prices in this market are also falling. Demand for shrimp in the US market dropped sharply due to oversupply. Vietnamese shrimp exports to the US in January 2023 reached 23 million USD, down 65% over the same period. Shrimp exports to the EU in 2023 are not positive due to the impact of inflation and uncertainties related to the Russia-Ukraine war. Shrimp exports to the second largest market, the EU in January reached 24 million USD, down 55% over the same period. Besides, the goods distribution system in Japan is complicated with many different levels and separate functions. However, this market requires increasingly high standards of food hygiene, safety and sustainability. Shrimp exports to Japan are expected to remain stable in 2023 as Vietnam's processed shrimp products are still in good demand in this market. Shrimp exports to Japan in January this year reached $29 million, down 47% over the same period. Japan was the largest shrimp import market of Vietnam in the first month of the year, accounting for 20.3%. January this year coincided with the Tet holiday, market demand declined, raw shrimp was scarce, so the shrimp exported still followed the downturn of the end of 2022.Įxports to all markets simultaneously decreased by double digits. ![]() In January 2023, Vietnam's shrimp exports reached 141 million USD, down 55% compared to the same period in 2022. ![]() Vietnam's □□ shrimp □ exports reached USD 141M in the first month of 2023.
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