Integrating multiple sources of data on migratory timing and catchability to estimate escapement for steelhead trout (Oncorhynchus mykiss)

2007 ◽  
Vol 64 (8) ◽  
pp. 1101-1115 ◽  
Author(s):  
Josh Korman ◽  
Caroline C Melville ◽  
Paul S Higgins
Keyword(s):  
Oncorhynchus Mykiss ◽  
Strong Support ◽  
Steelhead Trout ◽  
Multiple Sources ◽  
Weak Support ◽  
Life Data ◽  
Spawning Behaviour ◽  
Median Date ◽  
Gender Based ◽  
And Gender

We evaluated the influence of biological, physical, and year effects on catchability, survey life, and departure timing for a winter-run steelhead (Oncorhynchus mykiss) population and compared the performance of alternate escapement models. Date of entry and gender explained 65% of the variability in survey life, and there was no evidence for differences in survey life among years. The median date of departure for male spawners occurred 2 weeks later relative to females, and a gender-based departure model was strongly supported. Departure timing was significantly different among years (p < 0.05), but the maximum difference in median departure dates was only 11 days. The ratio of horizontal visibility to discharge explained 50% of the variation in catchability, and there was weak support for a model that accounted for effects associated with courtship and spawning behaviour. There was strong support for an escapement model that assumed survey life and catchability relationships were common among years. Joint use of departure timing and survey life data reduced uncertainty in escapement estimates by an average of 40%. The major advantage of our escapement model is that it increases the precision of estimates while avoiding the use of overly simplistic assumptions about run timing and catchability.

Maximum stream temperature and the occurrence, abundance, and behavior of steelhead trout (Oncorhynchus mykiss) in a southern California stream

2013 ◽  
Vol 70 (1) ◽  
pp. 64-73 ◽  
Author(s):  
Matthew R. Sloat ◽  
Ann-Marie K. Osterback
Keyword(s):  
Oncorhynchus Mykiss ◽  
Strong Support ◽  
Stream Temperature ◽  
Temperature Management ◽  
Steelhead Trout ◽  
Southern Limit ◽  
Small Stream ◽  
Thermal Refugia ◽  
Management Actions ◽  
And Behavior

To determine individual and population responses of steelhead trout (Oncorhynchus mykiss) to stream temperature, we sampled summer stream temperature and juvenile steelhead occurrence, abundance, and behavior in a small stream near the species' southern limit. Maximum annual stream temperature (22.3–33.1 °C) exerted a strong threshold effect on steelhead occurrence. Steelhead persisted through summer in all pools that did not exceed 30 °C, but the probability of persistence rapidly decreased to zero at warmer sites. Below the threshold for fish persistence, thermal effects on steelhead abundance were inconsistent, with temperature receiving strong support for inclusion in models of fish abundance at the beginning of summer but weak support for inclusion in models of end-of-summer abundance and summer fish loss. Thermal refugia that would allow steelhead to behaviorally thermoregulate were rare. In response to elevated stream temperatures, steelhead reduced foraging and agonistic activity, presumably to minimize energetic costs. In anticipation of the effects of global climate trends on stream temperature, management actions that limit or reduce stream heating will be critical for conservation of steelhead populations in habitats approaching thermal tolerance thresholds.

Photos from the Quarter

2020 ◽  
Vol 49 (2) ◽  
pp. 105-112
Keyword(s):  
Gender Based Violence ◽  
Gender Based ◽  
And Gender ◽  
Israeli Occupation

This sample of photos from 16 August–15 November 2019 aims to convey a sense of Palestinian life during this quarter. The images capture Palestinians across the diaspora as they fight to exercise their rights: to run for office, to vote, and to protest both Israeli occupation and gender-based violence.

THE SINS OF THE FATHER: GENDER- BASED VIOLENCE IN POST-APARTHEID SOUTH AFRICA

2017 ◽  
Vol 14 (2) ◽  
pp. 57-70 ◽  
Author(s):  
Lyn Snodgrass
Keyword(s):  
South Africa ◽  
Black Women ◽  
South African ◽  
African Women ◽  
Gender Based Violence ◽  
Political Issues ◽  
Race And Gender ◽  
Gender Based ◽  
And Gender ◽  
South African Women

This article explores the complexities of gender-based violence in post-apartheid South Africa and interrogates the socio-political issues at the intersection of class, ‘race’ and gender, which impact South African women. Gender equality is up against a powerful enemy in societies with strong patriarchal traditions such as South Africa, where women of all ‘races’ and cultures have been oppressed, exploited and kept in positions of subservience for generations. In South Africa, where sexism and racism intersect, black women as a group have suffered the major brunt of this discrimination and are at the receiving end of extreme violence. South Africa’s gender-based violence is fuelled historically by the ideologies of apartheid (racism) and patriarchy (sexism), which are symbiotically premised on systemic humiliation that devalues and debases whole groups of people and renders them inferior. It is further argued that the current neo-patriarchal backlash in South Africa foments and sustains the subjugation of women and casts them as both victims and perpetuators of pervasive patriarchal values.

The Demand For Money in Pakistan: Reply (Notes and Comments)

1975 ◽  
Vol 14 (3) ◽  
pp. 370-375
Author(s):  
M. A. Akhtar
Keyword(s):  
Interest Rates ◽  
Money Demand ◽  
Strong Support ◽  
Physical Capital ◽  
Careful Examination ◽  
Demand For Money ◽  
Weak Support ◽  
Complementarity Hypothesis ◽  
The Difference ◽  
The One

I am grateful to Abe, Fry, Min, Vongvipanond, and Yu (hereafter re¬ferred to as AFMVY) [1] for obliging me to reconsider my article [2] on the demand for money in Pakistan. Upon careful examination, I find that the AFMVY results are, in parts, misleading and that, on the whole, they add very little to those provided in my study. Nevertheless, the present exercise as well as the one by AFMVY is useful in that it furnishes us with an opportunity to view some of the fundamental problems involved in an empi¬rical analysis of the demand for money function in Pakistan. Based on their elaborate critique, AFMVY reformulate the two hypo¬theses—the substitution hypothesis and the complementarity hypothesis— underlying my study and provide us with some alternative estimates of the demand for money in Pakistan. Briefly their results, like those in my study, indicate that income and interest rates are important in deter¬mining the demand for money. However, unlike my results, they also suggest that the price variable is a highly significant determinant of the money demand function. Furthermore, while I found only a weak support for the complementarity between money demand and physical capital, the results obtained by AFMVY appear to yield a strong support for that rela¬tionship.1 The difference in results is only a natural consequence of alter¬native specifications of the theory and, therefore, I propose to devote most of this reply to the criticisms raised by AFMVY and the resulting reformulation of the two mypotheses.

scholarly journals Sexual health (excluding reproductive health, intimate partner violence and gender-based violence) and COVID-19: a scoping review

2021 ◽  
pp. sextrans-2020-054896
Author(s):  
Navin Kumar ◽  
Kamila Janmohamed ◽  
Kate Nyhan ◽  
Laura Forastiere ◽  
Wei-Hong Zhang ◽  
...  
Keyword(s):  
Intimate Partner Violence ◽  
Health Disparities ◽  
Reproductive Health ◽  
Sexual Health ◽  
Scoping Review ◽  
Partner Violence ◽  
Intimate Partner ◽  
Gender Based Violence ◽  
Gender Based ◽  
And Gender

ObjectivesThe COVID-19 pandemic has exposed and exacerbated existing socioeconomic and health disparities, including disparities in sexual health and well-being. While there have been several reviews published on COVID-19 and population health disparities generally—including some with attention to HIV—none has focused on sexual health (ie, STI care, female sexual health, sexual behaviour). We have conducted a scoping review focused on sexual health (excluding reproductive health (RH), intimate partner violence (IPV) and gender-based violence (GBV)) in the COVID-19 era, examining sexual behaviours and sexual health outcomes.MethodsA scoping review, compiling both peer-reviewed and grey literature, focused on sexual health (excluding RH, IPV and GBV) and COVID-19 was conducted on 15 September 2020. Multiple bibliographical databases were searched. Study selection conformed to Joanna Briggs Institute (JBI) Reviewers’ Manual 2015 Methodology for JBI Scoping Reviews. We only included English-language original studies.ResultsWe found that men who have sex with men may be moving back toward pre-pandemic levels of sexual activity, and that STI and HIV testing rates seem to have decreased. There was minimal focus on outcomes such as the economic impact on sexual health (excluding RH, IPV and GBV) and STI care, especially STI care of marginalised populations. In terms of population groups, there was limited focus on sex workers or on women, especially women’s sexual behaviour and mental health. We noticed limited use of qualitative techniques. Very few studies were in low/middle-income countries (LMICs).ConclusionsSexual health research is critical during a global infectious disease pandemic and our review of studies suggested notable research gaps. Researchers can focus efforts on LMICs and under-researched topics within sexual health and explore the use of qualitative techniques and interventions where appropriate.

Somali Immigrant Mothers’ Experiences of School Engagement: Implications for School Leaders

2021 ◽  
pp. 0013161X2110335
Author(s):  
Nimo M. Abdi
Keyword(s):  
School Engagement ◽  
School Leaders ◽  
Parental Knowledge ◽  
School Structure ◽  
Immigrant Mothers ◽  
Coloniality Of Gender ◽  
Gender Based ◽  
And Gender ◽  
Somali Immigrant ◽  
Mothers Experiences

Purpose: This critical phenomenology study examines the experiences of Somali mothers’ involvement with an urban school in London, United Kingdom. Specifically, the study explores Somali mothers’ experiences and responses in navigating the coloniality of gender discourses imbedded in school structure and culture. The research questions that guided the study concerned the gender-based tools that Somali mothers use to navigate the school structure and culture and how school leaders can recognize and tap into parental knowledge and ways of being to serve these communities. Methods: This study is based on the stories of five Somali immigrant mothers. Data collection included focus groups, field memos, site observations, and school archival data. Data were analyzed through hermeneutic interpretation of whole-part-whole. Findings: Somali mothers use three important elements—identity, resistance, and traditions—to respond to coloniality of gender in school as they negotiate tensions between the Somali conception of motherhood and western notions of gender. The findings emphasize the practices rooted in Indigenous Somali culture and gender roles as assets. Implications: This research argues that the matripotent leadership practices of Somali mothers can inform theory, practice, and policy, as these practices offer a more collective and humanizing approach to leadership centered in ideals connected to a non-Western conception of motherhood, gender, and gender dynamics.

Navigating gender in elite bargains: Women's movements and the quest for inclusive peace in Colombia

2021 ◽  
pp. 1-24
Author(s):  
Alexandra Phelan ◽  
Jacqui True
Keyword(s):  
Large Scale ◽  
Armed Forces ◽  
Women's Movements ◽  
Power Structures ◽  
Peace Agreement ◽  
Bargaining Process ◽  
Political Bargaining ◽  
Significant Case ◽  
Gender Based ◽  
And Gender

Abstract A growing body of scholarship connects the participation of women and the inclusion of gender provisions to the sustainability of peace settlements. But how do women's groups navigate gender power structures and gendered forms of violence within complex and fragile political bargaining processes aimed at ending large-scale conflict? The 2016 Colombian peace agreement, internationally applauded for its inclusion of strong gender provisions and women's participation as negotiators and peace advocates, is a significant case for examining these questions. Drawing on original case material, including interviews of key actors on different sides of the conflict – this article analyses the political bargaining dynamics within and among women's movements, the Santos government and the Revolutionary Armed Forces of Colombia (Fuerzas Armadas Revolucionarias de Colombia, FARC). We argue that the inclusion of women was pivotal in transforming the elite bargaining process and power structures of Colombian society enabling a gender-based approach to the substantive peace agenda addressing transitional gender justice for sexual violence survivors and gender-equal redistribution through land and rural reform programmes. The study suggests that deeply situated political bargaining analysis is essential to navigating gender in elite bargains rather than a one-size-fits-all approach to inclusive peace.

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