Assessing the coherence in biological and environmental drivers of young sea bass abundance across important estuarine nursery areas of the northern European sea bass stock

Year class strength is an important determinant of fish population size, but the drivers are often unknown. The northern stock of European sea bass (Dicentrarchus labrax) is an important target species for both commercial and recreational fisheries. Scientific assessments showed a rapid decline in spawning stock biomass from 2010-18 attributed to a combination of fishing mortality and poor year class strength. Recruitment to the adult stock is linked to the abundance and temporal dynamics of young bass in estuarine nursery areas, but little is known about the relative importance of environmental and biological drivers on the survival of these young life stages. In this study, we use Generalised Linear Models to attempt to identify important local environmental (sea surface temperature and river flow) and biological (chlorophyll-a concentration and predator abundance) drivers of young sea bass abundance. We focus on seven British and Irish estuarine areas that are important to the northern stock of European sea bass. In four English estuarine areas there were good model fits to the abundance of young sea bass, but predictors differed amongst these suggesting that drivers of abundance may differ among individual nursery areas. This was further demonstrated by poor fits of models generated for English estuaries to interannual patterns of abundance in the Irish nursery areas tested. The differences found in the most important abundance drivers amongst areas highlight the complex and differing dynamics between estuaries. If the number of young bass that eventually join the adult stock is dependent on survivors from a diverse set of unique nursery area conditions, then endeavours to incorporate this knowledge into fisheries management should be further explored

Book Reviews

Book reviews of: Song of My Life: A Biography of Margaret Walker. By Carolyn J. Brown Jackson: University Press of Mississippi, 2014. Author’s note, afterword, acknowledgements, illustrations, appendices, notes, bibliography, index. Pp. xi, 147. $20.00 cloth. ISBN: 9781628461473. Searching for Freedom after the Civil War: Klansman, Carpetbagger, Scalawag, and Freedman. By G. Ward Hubbs. (Tuscaloosa: The University of Alabama Press, 2015. List of illustrations, preface, prologue, appendices, notes, bibliography, index. Pp. ix, 223.$34.95 cloth, $34.95 ebook. ISBN: 978-0-8173-1860-4.) Choctaw Resurgence in Mississippi: Race, Class, and Nation Building in the Jim Crow South, 1830-1977. By Katherine M. B. Osburn. (Lincoln: University of Nebraska Press, 2014. Acknowledgements, illustrations, maps, notes, index. Pp. 342.$65 Cloth, $25 Paper. ISBN: 0803240445.) Stennis: Plowing a Straight Furrow. By Don H. Thompson (Oxford: Triton Press, 2015. Acknowledgments, illustrations, notes. Pp. 176.$35 cloth. $14.95 paper. ISBN: 1936946467.) Corazón de Dixie: Mexicanos in the U. S. South since 1910. By Julie M. Weise. (Chapel Hill: University of North Carolina Press, 2015. Acknowledgments, appendix, notes, bibliography, index. Pp. 358.$32.50 paper, $29.99 e-book. ISBN: 9781469624969.) The Great Melding: War, the Dixiecrat Rebellion, and the Southern Model for America’s New Conservatism. By Glenn Feldman. (Tuscaloosa: University of Alabama Press, 2015. Acknowledgements, notes, index. Pp. x, 388.$59.95 cloth, $59.95 ebook. ISBN 978-0-8173-1866-6.) Baptists in America: A History. By Thomas S. Kidd and Barry Hankins. (New York: Oxford University Press, 2015. Preface, acknowledgements, notes, index. pp. xii, 329.$29.95 cloth. ISBN: 9780199977536.) One Nation Under God: How Corporate America Invented Christian America. By Kevin M. Kruse. (New York: Basic Books, 2015. Acknowledgements, notes, index. Pp. xvi, 352. $29.99. ISBN: 9780465049493.) Confederate Generals in the Trans-Mississippi: Essays on America’s Civil War, Vol. 1, Edited by Lawrence Lee Hewitt with Arthur W. Bergeron, Jr., and Thomas E. Schott. (Knoxville: University of Tennessee Press, 2013. Acknowledgments, illustrations, maps, notes, index. Pp. xxiii, 302.$54.95 cloth. ISBN: 9781572338661.) Agriculture and the Confederacy: Policy, Productivity, and Power in the Civil War South. By R. Douglas Hurt. (Chapel Hill: The University of North Carolina Press, 2015. Acknowledgements, maps, tables, notes, index. Pp. xi, 349. $45 paper. ISBN: 1469620006.) Womanpower Unlimited and the Black Freedom Struggle in Mississippi. By Tiyi M. Morris. (Athens: University of Georgia Press, 2015. Acknowledgements, illustrations, notes index. Pp. xvi, 237.$69.95 cloth, $24.95 paper. ISBN: 0820347302.

Pelagic connectivity of European sea bass between spawning and nursery grounds

The sea bass stock around the UK (northern stock) has declined rapidly over the past decade, likely due to a combination of both overfishing and low recruitment. Understanding mechanisms that drive the number of young reaching nursery grounds is important for explaining observed recruitment variability and therefore developing effective management strategies. An individual-based model (IBM) has been developed here to investigate factors affecting sea bass settlement on nursery grounds for the northern stock. Simulations considered seven years with varying environmental conditions and year class strength, and outputs were compared to empirical data from monitoring of nursery areas in the UK and Ireland. The IBM includes hydrodynamics to simulate the drift of eggs and larvae, temperature-dependent growth and mortality, and behavior affecting position in the water column. Comparison between the model and ICES assessment abundance of age class zero fish showed similar temporal variability, but with higher recruitment predicted for 2018, and a lower peak recruitment in 1997. The model reproduced general patterns of interannual variability for the Thames estuary, but performed less well for some other regions. Further investigation is needed to understand differences between modelled supply and observations, as these could be due to uncertainties in reproducing the physical environment (e.g., currents, temperature) or biology (e.g., spawning, behavior, mortality), as well as uncertainty in recruitment derived from stock assessments or data collected from nursery grounds. Nevertheless, the model provides a useful demonstration of connectivity between spawning and nursery grounds, showing spawning regions that are likely to have greatest influence on recruitment in different estuaries, and how these may vary interannually. For example, sources from western Channel and Celtic Sea can supply larvae to many areas, leading to connectivity across the Channel and Celtic Sea, and into the Irish Sea. However, other regions may depend on more local areas. For example, with the Solent estuary dependent on sources within the Channel each year. With the temperature-dependence on growth, and therefore duration of the pelagic stage, results show the potential influence of spawning timing, in relation to ocean temperatures, for connectivity between spawning and nursery grounds.</jats:p

Antibody Prevalence of West Nile Virus in Birds, Illinois, 2002

Antibodies to West Nile virus were detected in 94 of 1,784 Illinois birds during 2002. Captive and urban birds had higher seropositivity than did birds from natural areas, and northern and central Illinois birds’ seropositivity was greater than that from birds from the southern sites. Adult and hatch-year exposure rates did not differ significantly

Trends in Chondrichthyan Research: An Analysis of Three Decades of Conference Abstracts

Given the conservation status and ecological, cultural, and commercial importance of chondrichthyan fishes, it is valuable to evaluate the extent to which research attention is spread across taxa and geographic locations and to assess the degree to which scientific research is appropriately addressing the challenges they face. Here we review trends in research effort over three decades (1985–2016) through content analysis of every abstract (n = 2,701) presented at the annual conference of the American Elasmobranch Society (AES), the oldest and largest professional society focused on the scientific study and management of these fishes. The most common research areas of AES abstracts were reproductive biology, movement/telemetry, age and growth, population genetics, and diet/feeding ecology, with different areas of focus for different study species or families. The most commonly studied species were large and charismatic (e.g., White Shark, Carcharodon carcharias), easily accessible to long-term established field research programs (e.g., Lemon Shark, Negaprion brevirostris, and Sandbar Shark, Carcharhinus plumbeus), or easily kept in aquaria for lab-based research (e.g., Bonnethead Shark, Sphyrna tiburo). Nearly 90% of all described chondrichthyan species have never been mentioned in an AES abstract, including some of the most threatened species in the Americas. The proportion of female* first authors has increased over time, though many current female* Society members are graduate students. Nearly half of all research presented at AES occurred in the waters of the United States rather than in the waters of developing nations where there are more threatened species and few resources for research or management. Presentations based on research areas such as paleontology and aquarium-based research have declined in frequency over time, and identified research priorities such as social science and interdisciplinary research are poorly represented. Possible research gaps and future research priorities for the study of chondrichthyan fishes are also discussed

Just a wind-up? Ethnicity, religion and prejudice in Scottish football-related comedy

This article probes how media representations of football in Scotland sustain the hegemonic ideologies associated with ethnicity and religion. The paper probes the football-related comedy output of one radio programme; radio output and football comedy are both neglected cultural material in studies of sport in Scotland. It argues that ambiguity and allusive language in comedy construct multiple interpretative possibilities that can demean the social and cultural identity of particular groups in society. The discussion analyses specific sketches from the Scottish radio comedy show Watson's Wind Up. It is concluded that although humorous, these sketches reveal how ideas, myths and stereotypes that coalesce round Celtic FC and the Irish-descended and Catholic communities in Scotland reinforce and sustain anti-Irish and anti-Catholic bigotry

Drivers of reef shark abundance and biomass in the Solomon Islands

Remote island nations face a number of challenges in addressing concerns about shark population status, including access to rigorously collected data and resources to manage fisheries. At present, very little data are available on shark populations in the Solomon Islands and scientific surveys to document shark and ray diversity and distribution have not been completed. We aimed to provide a baseline of the relative abundance and diversity of reef sharks and rays and assess the major drivers of reef shark abundance/biomass in the Western Province of the Solomon Islands using stereo baited remote underwater video. On average reef sharks were more abundant than in surrounding countries such as Fiji and Indonesia, yet below that of remote islands without historical fishing pressure, suggesting populations are relatively healthy but not pristine. We also assessed the influence of location, habitat type/complexity, depth and prey biomass on reef shark abundance and biomass. Location was the most important factor driving reef shark abundance and biomass with two times the abundance and a 43% greater biomass of reef sharks in the more remote locations, suggesting fishing may be impacting sharks in some areas. Our results give a much needed baseline and suggest that reef shark populations are still relatively unexploited, providing an opportunity for improved management of sharks and rays in the Solomon Islands

Decelerating Spread of West Nile Virus by Percolation in a Heterogeneous Urban Landscape

Vector-borne diseases are emerging and re-emerging in urban environments throughout the world, presenting an increasing challenge to human health and a major obstacle to development. Currently, more than half of the global population is concentrated in urban environments, which are highly heterogeneous in the extent, degree, and distribution of environmental modifications. Because the prevalence of vector-borne pathogens is so closely coupled to the ecologies of vector and host species, this heterogeneity has the potential to significantly alter the dynamical systems through which pathogens propagate, and also thereby affect the epidemiological patterns of disease at multiple spatial scales. One such pattern is the speed of spread. Whereas standard models hold that pathogens spread as waves with constant or increasing speed, we hypothesized that heterogeneity in urban environments would cause decelerating travelling waves in incipient epidemics. To test this hypothesis, we analysed data on the spread of West Nile virus (WNV) in New York City (NYC), the 1999 epicentre of the North American pandemic, during annual epizootics from 2000–2008. These data show evidence of deceleration in all years studied, consistent with our hypothesis. To further explain these patterns, we developed a spatial model for vector-borne disease transmission in a heterogeneous environment. An emergent property of this model is that deceleration occurs only in the vicinity of a critical point. Geostatistical analysis suggests that NYC may be on the edge of this criticality. Together, these analyses provide the first evidence for the endogenous generation of decelerating travelling waves in an emerging infectious disease. Since the reported deceleration results from the heterogeneity of the environment through which the pathogen percolates, our findings suggest that targeting control at key sites could efficiently prevent pathogen spread to remote susceptible areas or even halt epidemics

“Halal fiction” and the limits of postsecularism: Criticism, critique, and the Muslim in Leila Aboulela’s Minaret

This article examines Leila Aboulela’s 2005 novel Minaret, considering the extent to which it can be seen as an example of a postsecular text. The work has been praised by some as one of the most cogent attempts to communicate a life of Islamic faith in the English language novel form. Others have expressed concern about what they perceive as its apparent endorsement of submissiveness and a secondary status for women, along with its silence on some of the more thorny political issues facing Islam in the modern world. I argue that both these readings are shaped by the current “market” for Muslim novels, which places on such texts the onus of being “authentically representative”. Moreover, while apparently underwriting claims to authenticity, Aboulela’s technique of unvarnished realism requires of the reader the kind of suspension of disbelief in the metaphysical that appears to run contrary to the secular trajectory of the English literary novel in the last 300 years. I take issue with binarist versions of the postsecular thesis that equate the post-Enlightenment West with relentless desacralization and the “Islamic world” with a persistent collectivist and spiritual outlook, and suggest that we pay more attention to fundamental narrative elements which recur across the supposed West/East divide. Historically simplistic understandings of the secularization of culture — followed in the last few years by a postsecular turn — misrepresent the actual evolution of the novel. The “religious” persists, albeit transmuted into symbolic schema and themes of material or emotional redemption. I end by arguing for the renewed relevance of the kind of analysis of literary “archetypes” suggested by Northrop Frye, albeit disentangled from its specifically Christian resonances and infused by more attention to cultural cross-pollination. It is this type of approach that seems more accurately to account for the peculiarities of Aboulela’s fiction