Letteratura scientifica selezionata sul tema "Marine pollution South Australia Christies Beach"

Over the past century, many books for general readers have styled sharks as “monsters of the deep” (Steele). In recent decades, however, at least some writers have also turned to representing how sharks are seriously threatened by human activities. At a time when media coverage of shark sightings seems ever increasing in Australia, scholarship has begun to consider people’s attitudes to sharks and how these are formed, investigating the representation of sharks (Peschak; Ostrovski et al.) in films (Le Busque and Litchfield; Neff; Schwanebeck), newspaper reports (Muter et al.), and social media (Le Busque et al., “An Analysis”). My own research into representations of surfing and sharks in Australian writing (Brien) has, however, revealed that, although reporting of shark sightings and human-shark interactions are prominent in the news, and sharks function as vivid and commanding images and metaphors in art and writing (Ellis; Westbrook et al.), little scholarship has investigated their representation in Australian books published for a general readership. While recognising representations of sharks in other book-length narrative forms in Australia, including Australian fiction, poetry, and film (Ryan and Ellison), this enquiry is focussed on non-fiction books for general readers, to provide an initial review. Sampling holdings of non-fiction books in the National Library of Australia, crosschecked with Google Books, in early 2021, this investigation identified 50 Australian books for general readers that are principally about sharks, or that feature attitudes to them, published from 1911 to 2021. Although not seeking to capture all Australian non-fiction books for general readers that feature sharks, the sampling attempted to locate a wide range of representations and genres across the time frame from the earliest identified text until the time of the survey. The books located include works of natural and popular history, travel writing, memoir, biography, humour, and other long-form non-fiction for adult and younger readers, including hybrid works. A thematic analysis (Guest et al.) of the representation of sharks in these texts identified five themes that moved from understanding sharks as fishes to seeing them as monsters, then prey, and finally to endangered species needing conservation. Many books contained more than one theme, and not all examples identified have been quoted in the discussion of the themes below. Sharks as Part of the Natural Environment Drawing on oral histories passed through generations, two memoirs (Bradley et al.; Fossa) narrate Indigenous stories in which sharks play a central role. These reveal that sharks are part of both the world and a wider cosmology for Aboriginal and Torres Strait Islander people (Clua and Guiart). In these representations, sharks are integrated with, and integral to, Indigenous life, with one writer suggesting they are “creator beings, ancestors, totems. Their lifecycles reflect the seasons, the landscape and sea country. They are seen in the movement of the stars” (Allam). A series of natural history narratives focus on zoological studies of Australian sharks, describing shark species and their anatomy and physiology, as well as discussing shark genetics, behaviour, habitats, and distribution. A foundational and relatively early Australian example is Gilbert P. Whitley’s The Fishes of Australia: The Sharks, Rays, Devil-fish, and Other Primitive Fishes of Australia and New Zealand, published in 1940. Ichthyologist at the Australian Museum in Sydney from the early 1920s to 1964, Whitley authored several books which furthered scientific thought on sharks. Four editions of his Australian Sharks were published between 1983 and 1991 in English, and the book is still held in many libraries and other collections worldwide. In this text, Whitley described a wide variety of sharks, noting shared as well as individual features. Beautiful drawings contribute information on shape, colouring, markings, and other recognisable features to assist with correct identification. Although a scientist and a Fellow and then President of the Royal Zoological Society of New South Wales, Whitley recognised it was important to communicate with general readers and his books are accessible, the prose crisp and clear. Books published after this text (Aiken; Ayling; Last and Stevens; Tricas and Carwardine) share Whitley’s regard for the diversity of sharks as well as his desire to educate a general readership. By 2002, the CSIRO’s Field Guide to Australian Sharks & Rays (Daley et al.) also featured numerous striking photographs of these creatures. Titles such as Australia’s Amazing Sharks (Australian Geographic) emphasise sharks’ unique qualities, including their agility and speed in the water, sensitive sight and smell, and ability to detect changes in water pressure around them, heal rapidly, and replace their teeth. These books also emphasise the central role that sharks play in the marine ecosystem. There are also such field guides to sharks in specific parts of Australia (Allen). This attention to disseminating accurate zoological information about sharks is also evident in books written for younger readers including very young children (Berkes; Kear; Parker and Parker). In these and other similar books, sharks are imaged as a central and vital component of the ocean environment, and the narratives focus on their features and qualities as wondrous rather than monstrous. Sharks as Predatory Monsters A number of books for general readers do, however, image sharks as monsters. In 1911, in his travel narrative Peeps at Many Lands: Australia, Frank Fox describes sharks as “the most dangerous foes of man in Australia” (23) and many books have reinforced this view over the following century. This can be seen in titles that refer to sharks as dangerous predatory killers (Fox and Ruhen; Goadby; Reid; Riley; Sharpe; Taylor and Taylor). The covers of a large proportion of such books feature sharks emerging from the water, jaws wide open in explicit homage to the imaging of the monster shark in the film Jaws (Spielberg). Shark!: Killer Tales from the Dangerous Depths (Reid) is characteristic of books that portray encounters with sharks as terrifying and dramatic, using emotive language and stories that describe sharks as “the world’s most feared sea creature” (47) because they are such “highly efficient killing machines” (iv, see also 127, 129). This representation of sharks is also common in several books for younger readers (Moriarty; Rohr). Although the risk of being injured by an unprovoked shark is extremely low (Chapman; Fletcher et al.), fear of sharks is prevalent and real (Le Busque et al., “People’s Fear”) and described in a number of these texts. Several of the memoirs located describe surfers’ fear of sharks (Muirhead; Orgias), as do those of swimmers, divers, and other frequent users of the sea (Denness; de Gelder; McAloon), even if the author has never encountered a shark in the wild. In these texts, this fear of sharks is often traced to viewing Jaws, and especially to how the film’s huge, bloodthirsty great white shark persistently and determinedly attacks its human hunters. Pioneer Australian shark expert Valerie Taylor describes such great white sharks as “very big, powerful … and amazingly beautiful” but accurately notes that “revenge is not part of their thought process” (Kindle version). Two books explicitly seek to map and explain Australians’ fear of sharks. In Sharks: A History of Fear in Australia, Callum Denness charts this fear across time, beginning with his own “shark story”: a panicked, terror-filled evacuation from the sea, following the sighting of a shadow which turned out not to be a shark. Blake Chapman’s Shark Attacks: Myths, Misunderstandings and Human Fears explains commonly held fearful perceptions of sharks. Acknowledging that sharks are a “highly emotive topic”, the author of this text does not deny “the terror [that] they invoke in our psyche” but makes a case that this is “only a minor characteristic of what makes them such intriguing animals” (ix). In Death by Coconut: 50 Things More Dangerous than a Shark and Why You Shouldn’t Be Afraid of the Ocean, Ruby Ashby Orr utilises humour to educate younger readers about the real risk humans face from sharks and, as per the book’s title, why they should not be feared, listing champagne corks and falling coconuts among the many everyday activities more likely to lead to injury and death in Australia than encountering a shark. Taylor goes further in her memoir – not only describing her wonder at swimming with these creatures, but also her calm acceptance of the possibility of being injured by a shark: "if we are to be bitten, then we are to be bitten … . One must choose a life of adventure, and of mystery and discovery, but with that choice, one must also choose the attendant risks" (2019: Kindle version). Such an attitude is very rare in the books located, with even some of the most positive about these sea creatures still quite sensibly fearful of potentially dangerous encounters with them. Sharks as Prey There is a long history of sharks being fished in Australia (Clark). The killing of sharks for sport is detailed in An American Angler in Australia, which describes popular adventure writer Zane Grey’s visit to Australia and New Zealand in the 1930s to fish ‘big game’. This text includes many bloody accounts of killing sharks, which are justified with explanations about how sharks are dangerous. It is also illustrated with gruesome pictures of dead sharks. Australian fisher Alf Dean’s biography describes him as the “World’s Greatest Shark Hunter” (Thiele), this text similarly illustrated with photographs of some of the gigantic sharks he caught and killed in the second half of the twentieth century. Apart from being killed during pleasure and sport fishing, sharks are also hunted by spearfishers. Valerie Taylor and her late husband, Ron Taylor, are well known in Australia and internationally as shark experts, but they began their careers as spearfishers and shark hunters (Taylor, Ron Taylor’s), with the documentary Shark Hunters gruesomely detailing their killing of many sharks. The couple have produced several books that recount their close encounters with sharks (Taylor; Taylor, Taylor and Goadby; Taylor and Taylor), charting their movement from killers to conservationists as they learned more about the ocean and its inhabitants. Now a passionate campaigner against the past butchery she participated in, Taylor’s memoir describes her shift to a more respectful relationship with sharks, driven by her desire to understand and protect them. In Australia, the culling of sharks is supposedly carried out to ensure human safety in the ocean, although this practice has long been questioned. In 1983, for instance, Whitley noted the “indiscriminate” killing of grey nurse sharks, despite this species largely being very docile and of little threat to people (Australian Sharks, 10). This is repeated by Tony Ayling twenty-five years later who adds the information that the generally harmless grey nurse sharks have been killed to the point of extinction, as it was wrongly believed they preyed on surfers and swimmers. Shark researcher and conservationist Riley Elliott, author of Shark Man: One Kiwi Man’s Mission to Save Our Most Feared and Misunderstood Predator (2014), includes an extremely critical chapter on Western Australian shark ‘management’ through culling, summing up the problems associated with this approach: it seems to me that this cull involved no science or logic, just waste and politics. It’s sickening that the people behind this cull were the Fisheries department, which prior to this was the very department responsible for setting up the world’s best acoustic tagging system for sharks. (Kindle version, Chapter 7) Describing sharks as “misunderstood creatures”, Orr is also clear in her opposition to killing sharks to ‘protect’ swimmers noting that “each year only around 10 people are killed in shark attacks worldwide, while around 73 million sharks are killed by humans”. She adds the question and answer, “sounds unfair? Of course it is, but when an attack is all over the news and the people are baying for shark blood, it’s easy to lose perspective. But culling them? Seriously?” (back cover). The condemnation of culling is also evident in David Brooks’s recent essay on the topic in his collection of essays about animal welfare, conservation and the relationship between humans and other species, Animal Dreams. This disapproval is also evident in narratives by those who have been injured by sharks. Navy diver Paul de Gelder and surfer Glen Orgias were both bitten by sharks in Sydney in 2009 and both their memoirs detail their fear of sharks and the pain they suffered from these interactions and their lengthy recoveries. However, despite their undoubted suffering – both men lost limbs due to these encounters – they also attest to their ongoing respect for these creatures and specify a shared desire not to see them culled. Orgias, instead, charts the life story of the shark who bit him alongside his own story in his memoir, musing at the end of the book, not about himself or his injury, but about the fate of the shark he had encountered: great whites are portrayed … as pathological creatures, and as malevolent. That’s rubbish … they are graceful, mighty beasts. I respect them, and fear them … [but] the thought of them fighting, dying, in a net upsets me. I hope this great white shark doesn’t end up like that. (271–271) Several of the more recent books identified in this study acknowledge that, despite growing understanding of sharks, the popular press and many policy makers continue to advocate for shark culls, these calls especially vocal after a shark-related human death or injury (Peppin-Neff). The damage to shark species involved caused by their killing – either directly by fishing, spearing, finning, or otherwise hunting them, or inadvertently as they become caught in nets or affected by human pollution of the ocean – is discussed in many of the more recent books identified in this study. Sharks as Endangered Alongside fishing, finning, and hunting, human actions and their effects such as beach netting, pollution and habitat change are killing many sharks, to the point where many shark species are threatened. Several recent books follow Orr in noting that an estimated 100 million sharks are now killed annually across the globe and that this, as well as changes to their habitats, are driving many shark species to the status of vulnerable, threatened or towards extinction (Dulvy et al.). This is detailed in texts about biodiversity and climate change in Australia (Steffen et al.) as well as in many of the zoologically focussed books discussed above under the theme of “Sharks as part of the natural environment”. The CSIRO’s Field Guide to Australian Sharks & Rays (Daley et al.), for example, emphasises not only that several shark species are under threat (and protected) (8–9) but also that sharks are, as individuals, themselves very fragile creatures. Their skeletons are made from flexible, soft cartilage rather than bone, meaning that although they are “often thought of as being incredibly tough; in reality, they need to be handled carefully to maximise their chance of survival following capture” (9). Material on this theme is included in books for younger readers on Australia’s endangered animals (Bourke; Roc and Hawke). Shark Conservation By 1991, shark conservation in Australia and overseas was a topic of serious discussion in Sydney, with an international workshop on the subject held at Taronga Zoo and the proceedings published (Pepperell et al.). Since then, the movement to protect sharks has grown, with marine scientists, high-profile figures and other writers promoting shark conservation, especially through attempts to educate the general public about sharks. De Gelder’s memoir, for instance, describes how he now champions sharks, promoting shark conservation in his work as a public speaker. Peter Benchley, who (with Carl Gottlieb) recast his novel Jaws for the film’s screenplay, later attested to regretting his portrayal of sharks as aggressive and became a prominent spokesperson for shark conservation. In explaining his change of heart, he stated that when he wrote the novel, he was reflecting the general belief that sharks would both seek out human prey and attack boats, but he later discovered this to be untrue (Benchley, “Without Malice”). Many recent books about sharks for younger readers convey a conservation message, underscoring how, instead of fearing or killing sharks, or doing nothing, humans need to actively assist these vulnerable creatures to survive. In the children’s book series featuring Bindi Irwin and her “wildlife adventures”, there is a volume where Bindi and a friend are on a diving holiday when they find a dead shark whose fin has been removed. The book not only describes how shark finning is illegal, but also how Bindi and friend are “determined to bring the culprits to justice” (Browne). This narrative, like the other books in this series, has a dual focus; highlighting the beauty of wildlife and its value, but also how the creatures described need protection and assistance. Concluding Discussion This study was prompted by the understanding that the Earth is currently in the epoch known as the Anthropocene, a time in which humans have significantly altered, and continue to alter, the Earth by our activities (Myers), resulting in numerous species becoming threatened, endangered, or extinct. It acknowledges the pressing need for not only natural science research on these actions and their effects, but also for such scientists to publish their findings in more accessible ways (see, Paulin and Green). It specifically responds to demands for scholarship outside the relevant areas of science and conservation to encourage widespread thinking and action (Mascia et al.; Bennett et al.). As understanding public perceptions and overcoming widely held fear of sharks can facilitate their conservation (Panoch and Pearson), the way sharks are imaged is integral to their survival. The five themes identified in this study reveal vastly different ways of viewing and writing about sharks. These range from seeing sharks as nothing more than large fishes to be killed for pleasure, to viewing them as terrifying monsters, to finally understanding that they are amazing creatures who play an important role in the world’s environment and are in urgent need of conservation. This range of representation is important, for if sharks are understood as demon monsters which hunt humans, then it is much more ‘reasonable’ to not care about their future than if they are understood to be fascinating and fragile creatures suffering from their interactions with humans and our effect on the environment. Further research could conduct a textual analysis of these books. In this context, it is interesting to note that, although in 1949 C. Bede Maxwell suggested describing human deaths and injuries from sharks as “accidents” (182) and in 2013 Christopher Neff and Robert Hueter proposed using “sightings, encounters, bites, and the rare cases of fatal bites” (70) to accurately represent “the true risk posed by sharks” to humans (70), the majority of the books in this study, like mass media reports, continue to use the ubiquitous and more dramatic terminology of “shark attack”. The books identified in this analysis could also be compared with international texts to reveal and investigate global similarities and differences. While the focus of this discussion has been on non-fiction texts, a companion analysis of representation of sharks in Australian fiction, poetry, films, and other narratives could also be undertaken, in the hope that such investigations contribute to more nuanced understandings of these majestic sea creatures. 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I have only ever owned one pig. It didn’t have a name, due as it was for the table. Just pu‘aka. But I liked feeding it; nothing from the household was wasted. I planned not to become attached. We were having a feast and a pig was the one essential requirement. The piglet came to us as a small creature with a curly tail. It would not even live an adult life, as the fully-grown local pig is a fatty beast with little meat. Pigs are mostly killed when partly grown, when the meat/fat ratio is at its optimum. The pig was one of the few animals to accompany Polynesians as they made the slow journey across the islands and oceans from Asia: pigs and chickens and dogs. The DNA of island pigs reveals details about the route taken that were previously hidden (Larsen et al.). Of these three animals, pigs assumed the most ceremonial importance. In Tonga, pigs often live an exalted life. They roam freely, finding food where they can. They wallow. Wherever there is a pool of mud, often alongside a road, there is a pig wallowing. Huge beasts emerge from their pools with dark mud lining their bellies as they waddle off, teats swinging, to another pleasure. Pig snouts are extraordinarily strong; with the strength of a pig behind them, they can dig holes, uproot crops, and generally wreak havoc. How many times have I chased them from my garden, despairing at the loss of precious vegetables I could get no other way? But they must forage. They are fed scraps, and coconut for protein, but often must fend for themselves. Despite the fact that many meet an early death, their lives seem so much more interesting than those lived by the anonymous residents of intensive piggeries in Australia, my homeland. When the time came for the pig to be sacrificed to the demands of the feast, two young Tongan men did the honours. They also cooked the pig on an open fire after skewering it on a pole. Their reward was the roasted sweetmeats. The ‘umu was filled with taro and cassava, yam and sweet potato, along with lū pulu and lū ika: tinned beef and fish cooked in taro leaves and coconut cream. In the first sitting, all those of high status—church ministers, college teachers, important villagers and pālangi like me—had the first pick of the food. Students from the college and lowly locals had the second. The few young men who remained knew it was their task to finish off all of the food. They set about this activity with intense dedication, paying particular attention to the carcass of the pig. By the end of the night, what was left of our little pig was a pile of bones, the skeleton taken apart at every joint. Not a scrap of anything edible remained. In the early 1980s, I went to live on a small island in the Kingdom of Tonga, where my partner was the Principal of an agricultural college, in the main training young men for working small hereditary mixed farms. Memories of that time and a recent visit inform this reflection on the contemporary Tongan diet and problems associated with it. The role of food in a culture is never a neutral issue. Neither is body size, and Tongans have traditionally favoured the large body as an indication of status (Pollock 58). Similarly the capacity to eat has been seen as positive. Many Tongans are larger than is healthy, with 84% of men and 93% of women “considered overweight or obese” (Kirk et al. 36). The rate of diabetes, 80% of it undiagnosed, has doubled since the 1970s to 15% of the adult population (Colagiuri et al. 1378). In the Tongan diaspora there are also high rates of so-called “metabolic syndrome,” leading to this tendency to diabetes and cardiovascular disease. In Auckland, for instance, Pacific Islanders are 2.5 times more likely to suffer from this condition (Gentles et al.). Its chief cause is not, however, genetic, but comes from “differences in obesity,” leading to a much higher incidence of cardiovascular disease and diabetes (Gentles et al.). Deaths from diabetes in Tonga are common. When a minister’s wife in the neighbouring village to mine died, everyone of status on the island attended the putu. Though her gangrenous foot could have been amputated, the family decided against this, and she soon died from the complications of her diabetes. On arrival at the putu, as well as offering gifts such as mats and tapa, participants lined up to pay very personal respects to the dead woman. This took the form of a kiss on her face. I had never touched a dead person before, let alone someone who had died of gangrene, but life in another culture requires many firsts. I bent down and kissed the dry, cold face of a woman who had suffered much before dying. Young men of the family pushed sand over the grave with their own hands as the rest of us stood around, waiting for the funeral food: pigs, yes, but also sweets made from flour and refined sugar. Diet and eating practices are informed by culture, but so are understandings of illness and its management. In a study conducted in New Zealand, sharp differences were seen between the Tongan diaspora and European patients with diabetes. Tongans were more likely “to perceive their diabetes as acute and cyclical in nature, uncontrollable, and caused by factors such as God’s will, pollution in the environment, and poor medical care in the past”, and this was associated “with poorer adherence to diet and medication taking” (Barnes et al. 1). This suggests that as well as being more likely to suffer from illnesses associated with diet and body size, Tongans may also be less likely to manage them, causing these diseases to be even more debilitating. When James Cook visited the Tongan group and naively named them the Friendly Islands, he was given the customary hospitality shown to one of obviously high status. He and his officers were fed regularly by their hosts, even though this must have put enormous pressure on the local food systems, in which later supply was often guaranteed by the imposition of tapu in order to preserve crops and animals. Further pressure was added by exchanges of hogs for nails (Beaglehole). Of course, while they were feeding him royally and entertaining his crew with wrestling matches and dances, the local chiefs of Ha‘apai were arguing about exactly when they were going to kill him. If it were by night, it would be hard to take the two ships. By day, it might be too obvious. They never could agree, and so he sailed off to meet his fate elsewhere (Martin 279-80). As a visitor of status, he was regularly fed pork, unlike most of the locals. Even now, in contemporary Tonga, pigs are killed to mark a special event, and are not eaten as everyday food by most people. That is one of the few things about the Tongan diet that has not changed since the Cook visits. Pigs are usually eaten on formal feasting occasions, such as after church on the Sabbath (which is rigorously kept by law), at weddings, funerals, state occasions or church conferences. During such conferences, village congregations compete with each other to provide the most lavish spreads, with feasting occurring three times a day for a week or more. Though each pola is spread with a range of local root crops, fish and seafood, and possibly beef or even horse, the pola is not complete unless there is at least one pig on it. Pigs are not commercially farmed in Tonga, so these pigs have been hand- and self-raised in and around villages, and are in short supply after these events. And, although feasts are a visible sign of tradition, they are the exception. Tongans are not suffering from metabolic syndrome because they consume too much pork; they are suffering because in everyday life traditional foods have been supplanted by imports. While a range of traditional foods is still eaten, they are not always the first choice. Some imported foods have become delicacies. Mutton flap is a case in point. Known as sipi (sheep), it is mostly fat and bone, and even when barbequed it retains most of its fat. It is even found on outer islands without refrigeration, because it can be transported frozen and eaten when it arrives, thawed. I remember once the local shopkeeper said she had something I might like. A leg of lamb was produced from under the counter, mistakenly packed in the flap box. The cut was so unfamiliar that nobody else had much use for it. The question of why it is possible to get sipi in Tonga and very difficult to get any other kind of fresh meat other than one’s own pigs or chickens raises the question of how Tonga’s big neighbours think of Pacific islands. Such islands are the recipients of Australian and New Zealand aid; they are also the recipients of their waste. It’s not uncommon to find out of date medications, banned agricultural chemicals, and food that is really unsuitable for human consumption. Often the only fresh and affordable meat is turkey tails, chicken backs, and mutton flap. From July 2006 to July 2007, New Zealand exported $73 million worth of sheep off-cuts to the Pacific (Edwardes & Frizelle). Australia and the US account for the supply of turkey tails. Not only are these products some of the few fresh meat sources available, they are also relatively inexpensive (Rosen et al.). These foods are so detrimental to the health of locals that importing them has been banned in Fiji and independent Samoa (Edwardes & Frizelle). The big nations around the Pacific have found a market for the meat by-products their own citizens will not eat. Local food sources have also been supplanted as a result of the high value placed on other foods, like rice, flour and sugar, which from the nineteenth century became associated with “civilisation and progress” (Pollock 233). To counter this, education programs have been undertaken in Tonga and elsewhere in the Pacific in order to promote traditional local foods. These have also sought to address the impact of high food imports on the trade balance (Pollock 232). Food choices are not just determined by preference, but also by cost and availability. Similarly, the Tonga Healthy Weight Loss Program ran during the late 1990s, but it was found that a lack of “availability of healthy low-cost food was a problem” to its success (Englberger et al. 147). In a recent study of Tongan food preferences, it was found that “in general, Tongans prefer healthier traditional, indigenously produced, foods”, but that they are not always available (Evans et al. 170). In the absence of a consistent supply of local protein sources, the often inferior but available imported sources become the default ingredient. Fish in particular are in short supply. Though many Tongans can still be seen harvesting the reef for seafood at low tide, there is no extensive fishing industry capable of providing for the population at large. Intensive farming of pigs has been considered—there was a model piggery on the college where I lived, complete with facilities for methane collection—but it has not been undertaken. Given the strongly ceremonial function of the pig, it would take a large shift in thinking for it to be considered an everyday food. The first cooked pig I encountered arrived at my house in a woven coconut leaf basket, surrounded by baked taro and yam. It was a small pig, given by a family too poor to hold the feast usually provided after church when it was their turn. Instead, they gave the food portion owed directly to the preacher. There’s a faded photo of me squatting on a cracked linoleum floor, examining the contents of the basket, and wondering what on earth I’m going to do with them. I soon learnt the first lesson of island life: food must be shared. With no refrigeration, no family of strapping youths, and no plans to eat the pig myself, it had to be given away to neighbours. It was that simple. Even watermelon went off within the day. In terms of eating, that small pig would have been better kept until a later day, when it reached optimum size, but each family’s obligation came around regularly, and had to be fulfilled. Feasting, and providing for feasting, was a duty, even a fatongia mamafa: a “heavy duty” among many duties, in which the pig was an object deeply “entangled” in all social relations (Thomas). A small pig was big enough to carry the weight of such obligations, even if it could not feed a crowd. Growing numbers of tourists to Tonga, often ignored benignly by their hosts, are keen to snap photos of grazing pigs. It is unusual enough for westerners to see pigs freely wandering, but what is more striking about some pigs on Tongatapu and ‘Eua is that they venture onto the reefs and mudflats at low tide, going after the rich marine pickings, just as their human counterparts do. The silhouette of a pig in the water as the tropical sun sinks behind, caught in a digital frame, it is a striking memory of a holiday in a place that remains largely uninterested in its tourist potential. While an influx of guests is seen by development consultants as the path to the nation’s economic future, Tongans bemusedly refuse to take this possibility seriously (Menzies). Despite a negative trade balance, partly caused by the importation of foreign food, Tonga survives on a combination of subsistence farming and remittances from Tongans living overseas; the tourist potential is largely unrealised. Dirk Spennemann’s work took a strange turn when, as an archaeologist working in Tonga, it became necessary for him to investigate whether these reef-grazing pigs were disturbing midden contents on Tongatapu. In order to establish this, he collected bags of both wet and dry “pig excreta” (107). Spenemann’s methodology involved soaking the contents of these bags for 48 hours, stirring them frequently; “they dissolved, producing considerable smell” (107). Spennemann concluded that pigs do appear to have been eating fish and shellfish, along with grass and “the occasional bit of paper” (107). They also feed on “seaweed and seagrass” (108). I wonder if these food groups have any noticeable impact on the taste of their flesh? Creatures fed particular diets in order to create a certain distinct taste are part of the culinary traditions of the world. The deli around the corner from where I live sells such gourmet items as part of its lunch fare: Saltbush lamb baguettes are one of their favourites. In the Orkneys, the rare and ancient North Ronaldsay Sheep are kept from inland foraging for most of the year by a high stone fence in order to conserve the grass for lambing time. This forces them to eat seaweed on the beach, producing a distinct marine taste, one that is highly valued in certain Parisian restaurants. As an economy largely cut out of the world economic loop, Tonga is unlikely to find select menus on which its reef pigs might appear. While living on ‘Eua, I regularly took a three hour ferry trip to Tongatapu in order to buy food I could not get on my home island. One of these items was wholemeal flour, from which I baked bread in a mud oven we had built outside. Bread was available on ‘Eua, but it was white, light and transported loose in the back of truck. I chose to make my own. The ferry trip usually involved a very rough crossing, though on calmer days, roof passengers would cook sipi on the diesel chimney, added flavour guaranteed. It usually only took about thirty minutes on the way out from Nafanua Harbour before the big waves struck. I could endure them for a while, but soon the waves, combined with a heavy smell of diesel, would have me heading for the rail. On one journey, I tried to hold off seasickness by focussing on an island off shore from Tongatapu. I went onto the front deck of the ferry and faced the full blast of the wind. With waves and wind, it was difficult to stand. I diligently stared at the island, which only occasionally disappeared beneath the swell, but I soon knew that this trip would be like the others; I’d be leaning over the rail as the ocean came up to meet me, not really caring if I went over. I could not bear to share the experience, so in many ways being alone on the foredeck was ideal for me, if I had to be on the boat at all. At least I thought I was alone, but I soon heard a grunt, and looked across to see an enormous sow, trotters tied front and back, lying across the opposite side of the boat. And like me, she too was succumbing to her nausea. Despite the almost complete self-absorption seasickness brings, we looked at each other. I may have imagined an acknowledgement, but I think not. While the status of pigs in Tongan life remains important, in many respects the imposition of European institutions and the availability of imported foods have had an enormous impact on the rest of the Tongan diet, with devastating effects on the health of Tongans. Instead of the customary two slow-cooked meals, one before noon and one in the evening (Pollock 56), consisting mostly of roots crops, plantains and breadfruit, with a relish of meat or fish, most Tongans eat three meals a day in order to fit in with school and work schedules. In current Tongan life, there is no time for an ‘umu every day; instead, quick and often cheaper imported foods are consumed, though local foods can also be cooked relatively quickly. While some still start the day by grabbing a piece of left over cassava, many more would sit down to the ubiquitous Pacific breakfast food: crackers, topped with a slab of butter. Food is a neo-colonial issue. If larger nations stopped dumping unwanted and nutritionally poor food products, health outcomes might improve. Similarly, the Tongan government could tip the food choice balance by actively supporting a local and traditional food supply in order to make it as cheap and accessible as the imported foods that are doing such harm to the health of Tongans References Barnes, Lucy, Rona Moss-Morris, and Mele Kaufusi. “Illness Beliefs and Adherence in Diabetes Mellitus: A Comparison between Tongan and European Patients.” The New Zealand Medical Journal 117.1188 (2004): 1-9. Beaglehole, J.C. Ed. The Journals of Captain James Cook on his Voyages of Discovery: The Voyage of the Resolution and Discovery 1776-1780. Parts I & II. Cambridge: Hakluyt Society, 1967. ­­­____. Ed. The Journals of Captain James Cook on his Voyages of Discovery: The Voyage of the Resolution and Adventure 1772-1775. Cambridge: Hakluyt Society, 1969. Colagiuri, Stephen, Ruth Colgaiuri, Siva Na‘ati, Soana Muimuiheata, Zafirul Hussein, and Taniela Palu. “The Prevalence of Diabetes in the Kingdom of Tonga.” Diabetes Care 28.2 (2002): 1378-83. Edwardes, Brennan, and Frank Frizelle. “Globalisation and its Impact on the South Pacific.” The New Zealand Medical Journal 122.1291 (2009). 4 Aug. 2010 Englberger, L., V. Halavatau, Y. Yasuda, & R, Yamazaki. “The Tonga Healthy Weight Loss Program.” Asia Pacific Journal of Clinical Nutrition 8.2 (1999): 142-48. Gentles, Dudley, et al. “Metabolic Syndrome Prevalence in a Multicultural Population in Auckland, New Zealand.” Journal of the New Zealand Medical Association 120.1248 (2007). 4 Aug. 2010 Kirk, Sara F.L., Andrew J. Cockbain, and James Beasley. “Obesity in Tonga: A cross-sectional comparative study of perceptions of body size and beliefs about obesity in lay people and nurses.” Obesity Research & Clinical Practice 2.1 (2008): 35-41. Larsen, Gregor, et al. “Phylogeny and Ancient DNA of Sus Provides New Insights into Neolithic Expansion in Island Southeast Asia and Oceania.” Proceedings of the National Academy of Sciences of the United States of America 104.12 (2007): 4834-39. Martin, John. Tonga Islands: William Mariner’s Account, 1817. Neiafu, Tonga: Vava‘u, 1981. Menzies, Isa. “Cultural Tourism and International Development in Tonga: Notes from the Field”. Unpublished paper. Oceanic Passages Conference. Hobart, June 2010. Pollock, Nancy J. These Roots Remain: Food Habits in Islands of the Central and Eastern Pacific since Western Contact. Honolulu: Institute for Polynesian Studies, 1992. Rosen, Rochelle K., Judith DePue, and Stephen T. McGarvey. “Overweight and Diabetes in American Samoa: The Cultural Translation of Research into Health Care Practice.” Medicine and Health/ Rhode Island 91.12 (2008): 372-78. Spennemann, Dirk H.R. “On the Diet of Pigs Foraging on the Mud Flats of Tongatapu: An Investigation in Taphonomy.” Archaeology in New Zealand 37.2 (1994): 104-10. Thomas, Nicholas. Entangled Objects: Exchange, Material Objects and Colonialism in the Pacific. Cambridge, Massachusetts: Harvard UP, 1991.

Includes bibliographical references (leaves 136-154)
xvii, 171 leaves ; ill. (some col.), maps ; 30 cm.
Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes.
Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 2001

Includes bibliographical references (leaves 136-154) Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes.