Contesting captive cetaceans: (il)legal spaces and the nature of dolphins in urban Singapore

Drawing on the debate over dolphin captivity in Singapore, we examine the ways in which human–animal relationships are contested. Departing from most animal geography studies which often focused on the conflictual spatial transgressions of animals into human spaces, we use the idea of ‘captivity’ as a heuristic to posit that human–animal relationships are necessarily moral, spatially enmeshed in contestations over what is (un)natural and increasingly entwined in legal geographies. While such an argument mirrors other sites of animal captivity (for example, zoos), dolphin captivity sits in a more ambiguous legal terrain than most other captive animals in zoos. Moreover, the very ‘nature’ of dolphins makes debates over their ‘authenticity’ ever more complex. The moralities of cetaceans are simultaneously underpinned by questions of the spatial (‘captive sites’ and ‘open seas’), the socio-cultural (‘charismatic animals’) and the legal (‘regulatory frameworks governing their welfare and whether they are endangered or not’). Hitherto, cetaceans are less researched (compared to terrestrial creatures) in animal geographies with even fewer studies focusing on cetacean captivity. We call for an expanded notion of ‘captivity’ that is relative, relational and non-absolute and underpinned by the notions of ‘nature’. In so doing, we align ourselves more with the anti-captivity camp.     

Can salmonids (Oncorhynchus spp.) be identified to species using vertebral morphometrics?

Remains of anadromous Pacific salmon and trout (genus Oncorhynchus) are common in archaeological sites from California to Alaska; however, morphological similarity generally precludes species identification, limiting the range of questions that salmonid remains can address in relation to past human use and ongoing efforts in conservation biology. We developed a relatively simple, rapid, and non-destructive way to classify salmon and trout vertebrae from archaeological contexts to species using length, height and the ratio of length to height. Modern reference material was obtained from all seven anadromous Oncorhynchus species native to the west coast of North America. A minimum of ten adult Chinook (Oncorhynchus tshawytscha), chum (Oncorhynchus keta), coho (Oncorhynchus kisutch), pink (Oncorhynchus gorbuscha), and sockeye salmon (Oncorhynchus nerka) and cutthroat (Oncorhynchus clarki clarki) and steelhead trout (Oncorhynchus mykiss) were skeletonized and vertebra length and height were measured. Morphometric analyses compared species classification success based on Linear Discriminant Analysis (LDA), Classification and Regression Trees (CART), and randomForest, with CART performing the best. Classification analyses used all seven species individually, but because of considerable overlap among several species we also conducted analyses on four species groupings. We assigned Chinook salmon and cutthroat to their own groups based on their dissimilarities from each other and the other species. The remaining species were divided into two group complexes (a) chum, coho, and steelhead; and (b) pink and sockeye. When we grouped species according to similar morphology, CART overall success rates increased, ranging from 92 to 100%. Individual species with the highest successful classification rates using CART were Chinook salmon and cutthroat, from 92 to 100%, respectively. We applied our classification to an assemblage of ancient (1000–3000 year old) salmonid vertebrae from the Swiftwater Rockshelters excavations on the upper Wenatchee River in Washington State, U.S.A.     

THE IMPACT OF SPECIFIC-SECTOR CHANGES IN EMPLOYMENT ON ECONOMIC GROWTH, LABOR MARKET PERFORMANCE AND MIGRATION

ABSTRACT.  It is common in empirical regional economics to use total employment as an explanatory variable while investigating issues such as the level and distribution of income and migration. This paper argues that sector-specific changes in employment and labor market performance can have different effects on economic growth, the collection of tax revenue, migration, and the level and distribution of household income. As such, it is important to model sectors separately. We find that expansions in employment opportunities for a high-wage sector such as computer manufacturing or bioengineering, a medium-wage sector manufacturing, and the lower-wage sector of retailing have differing economic consequences for a small city. We use a data intensive computable general equilibrium model to obtain these results.     

Writing the History of the “Persian Arabs”: The Pre-Islamic Perspective on the “Naṣrids” of al-Ḥīrah

Modern scholarship on Arabs in the pre-Islamic period has focused on Rome's Arab allies—the so-called “Jafnids” or “Ghassānids,” with much less attention paid to Persia's Arab allies, the so-called “Na?rid” or “Lakhmid” dynasty of Arab leaders at al-?īrah in Iraq. This article examines select pre-Islamic sources for the Persian Arabs, showing that even with the meager evidence available to us, and the lack of archaeological material, it is possible to draw a relatively complex portrait of the Persian Arabs. This article situates the Persian Arabs as important figures in some key themes and phenomena of late antiquity, such as the growth of Christian communities, the conflict between Rome and Persia, and the struggle for influence in the Arabian peninsula.