Saving Seafood

Shipworms, long considered a pest, could be perfect species for sustainable aquaculture

November 30, 2023 — A University of Cambridge study has found that shipworms, or naked clams – which have historically been considered by many in the seafood industry to be a nuisance due to their ability to bore through the wood of ships, piers, and docks – can be turned into a nutritious source of protein for human consumption using an enclosed aquaculture system.

The study, titled “Naked clams to open a new sector in sustainable nutritious food production,” found that shipworms are the world’s fastest-growing bivalve and contain high levels of vitamin B12. The study’s authors said using the bivalve as seafood offers a rebrand for the traditionally recognized sea pest.

Read the full article at SeafoodSource

The simple food that fights climate change

December 3, 2020 — Simmering in pots around the world is a food that could spark a revolution. Most of us have probably eaten it at some point, but it’s an overlooked part of our diet. This natural source of protein is laden with essential nutrients that could fulfil the dietary needs of nearly one billion people in the most vulnerable populations on the planet. It could be a viable alternative to intensively-farmed meats such as beef. And it comes with smorgasbord of environmental and sociological gains.

The animals that are the source of this food require no feeding, need no antibiotics or agrochemicals to farm. And they actively sequester carbon. They can even protect fragile ecosystems by cleaning the water they live in. Welcome to the remarkable and unglamorous world of the bivalve.

This biological corner of our oceanic ecology is not as attention-grabbing as fish or mesmerising as a deep-sea octopus. Instead it includes the evolutionarily simpler family of shell-dwelling creatures consisting of mussels, clams, oysters and scallops. These hinge shelled molluscs have quietly embraced the lower reaches of the food chain as filter feeders, sustaining themselves on microscopic organic matter present in the waters of their immediate environment.

Their lowly status, however, perhaps means their potential has been largely overlooked. But as the world attempts to find ways of feeding a growing population with less environmental impact, many experts believe we may need to make these shellfish a larger part of our diet.

“Bivalves have the remarkable potential to provide people with food that is not only environmentally sustainable but also nutrient dense,” says David Willer, a zoologist at the University of Cambridge in the UK.

Read the full story at BBC

Cod bones from Mary Rose reveal globalised fish trade in Tudor England

September 9, 2015 — New stable isotope and ancient DNA analysis of the bones of stored cod provisions recovered from the wreck of the Tudor warship Mary Rose, which sank off the coast of southern England in 1545, has revealed that the fish in the ship’s stores had been caught in surprisingly distant waters: the northern North Sea and the fishing grounds of Iceland – despite England having well developed local fisheries by the 16th century.

Test results from one of the sample bones has led archaeologists to suspect that some of the stored cod came from as far away as Newfoundland in eastern Canada.

The research team say that the findings show how naval provisioning played an important role in the early expansion of the fish trade overseas, and how that expansion helped fuel the growth of the English navy. Commercial exploitation of fish and the growth of naval sea power were “mutually reinforcing aspects of globalisation” in Renaissance Europe, they say.

“The findings contribute to the idea that the demand for preserved fish was exceeding the supply that local English and Irish fisheries were able to provide in order to feed growing – and increasingly urban – populations. We know from these bones that one of the sources of demand was naval provisions,” said Dr James Barrett, from the McDonald Institute for Archaeological Research at the University of Cambridge.

“The existence and development of globalised fisheries was one of the things that made the growth of the navy possible. The navy was a key mechanism of maritime expansion, while at the same time being sustained by that expansion. The story of the cod trade is a microcosm of globalisation during this pivotal period that marked the beginning of an organised English navy, which would go on to become the Royal Navy,” he said.

Read the full story from the University of Cambridge