Copper effects in the copepod Tigriopus angulatus Lang, 1933: natural broad tolerance allows maintenance of food webs in copper-enriched coastal areas

2008 ◽  
Vol 59 (12) ◽  
pp. 1061 ◽  
Author(s):  
M. H. Medina ◽  
B. Morandi ◽  
J. A. Correa
Keyword(s):  
Food Webs ◽  
Local Population ◽  
Intrinsic Rate ◽  
Natural Increase ◽  
Coastal Areas ◽  
Trophic Levels ◽  
Northern Chile ◽  
Copper Mine Tailings ◽  
History Of ◽  
A Site

Some coastal areas of northern Chile have received copper mine tailings for more than 60 years. At these areas, the toxic effects of copper have eliminated most intertidal seaweed and macroinvertebrate populations. However, the harpacticoid splashpool copepod Tigriopus angulatus seems unaffected, inhabiting heavily impacted sites. Because this species of copepod makes the energy of photosynthesis available to higher trophic levels, it becomes ecologically relevant to define the range of copper it can tolerate without affecting its population size. This was assessed through the analysis of demographic responses measured in a life-cycle experiment with copepods from a site with no history of heavy metal pollution. Results showed that juvenile survival was the most sensitive endpoint and that the species’ intrinsic rate of natural increase (rm) remains unaffected (without showing a fitness cost associated with tolerance) at copper concentrations within the range measured at these impacted areas. Thus, despite the high levels of dissolved copper measured at those sites, the local population of T. angulatus apparently can persist in exploiting its ecological niche and contributing to the overall ecosystem functioning, highlighting an unforeseen role of this copepod in the maintenance of food webs at the copper-enriched environment of northern Chile.

Hormonal stimulation and some risk factors studied to improve bovine pregnancy rate at the Coastal areas of Barisal district of Bangladesh

2018 ◽  
Vol 52 (1-4) ◽  
pp. 22-30
Author(s):  
A K Paul ◽  
S M T Rahman
Keyword(s):  
Pregnancy Rate ◽  
Coastal Region ◽  
Hormonal Treatment ◽  
Coastal Areas ◽  
Pregnancy Rates ◽  
Hormonal Stimulation ◽  
Crossbred Cows ◽  
Treatment Groups ◽  
History Of ◽  
Group A

Hormonal treatment of cows at the coastal region of Barisal district of Bangladesh was performed to assess the improvement of pregnancy rate. A total of 100 cows and heifers with irregular history of cyclicity were selected randomly and divided into five treatment groups. The groups were A (treated with anthelmintic), B (treated with anthelmintic, vitamin ADE and multivitamin powder), C (treated with PGF2α), D (treated with GnRH) and E (treated with GnRH and PGF2α). Each group comprised of 20 animals. The age, breed and parity of experimental cows were considered during treatment. In the study, the cows treated with both GnRH and PGF2α (group E) showed significantly (p<0.05) higher estrus (80%) and pregnancy rate (60%) than that of group A, B, C and D. The overall estrus rates of local and crossbred cows were 64% and 70%, respectively and the pregnancy rates were 40 and 52%, respectively. The crossbred cows responded significantly (p<0.05) to hormonal treatment than that of local cows. Parity-2 cows showed higher estrus sign than that of other parities. However, the pregnancy rates were higher significantly (p<0.05) in parity-2 and parity ≥4 cows than that of parity-0, parity-1 and parity-3 cows. The pregnancy rate was also found higher in case of 4 to <5 years old cows than that of 2 to <3, 3 to <4, 5 to <6, and ≥6 years old. It may conclude that the hormonal regimen increases the pregnancy rate as well as decreases the undesired waiting of estrus and conception. Further study with more sample size will reveal the more effective treatment for cows at the coastal areas of Bangladesh.

Hormonal stimulation and some risk factors studied to improve bovine pregnancy rate at the Coastal areas of Barisal district of Bangladesh

2018 ◽  
Vol 52 (1-4) ◽  
pp. 22-30
Author(s):  
A K Paul ◽  
S M T Rahman
Keyword(s):  
Pregnancy Rate ◽  
Coastal Region ◽  
Hormonal Treatment ◽  
Coastal Areas ◽  
Pregnancy Rates ◽  
Hormonal Stimulation ◽  
Crossbred Cows ◽  
Treatment Groups ◽  
History Of ◽  
Group A

Hormonal treatment of cows at the coastal region of Barisal district of Bangladesh was performed to assess the improvement of pregnancy rate. A total of 100 cows and heifers with irregular history of cyclicity were selected randomly and divided into five treatment groups. The groups were A (treated with anthelmintic), B (treated with anthelmintic, vitamin ADE and multivitamin powder), C (treated with PGF2α), D (treated with GnRH) and E (treated with GnRH and PGF2α). Each group comprised of 20 animals. The age, breed and parity of experimental cows were considered during treatment. In the study, the cows treated with both GnRH and PGF2α (group E) showed significantly (p<0.05) higher estrus (80%) and pregnancy rate (60%) than that of group A, B, C and D. The overall estrus rates of local and crossbred cows were 64% and 70%, respectively and the pregnancy rates were 40 and 52%, respectively. The crossbred cows responded significantly (p<0.05) to hormonal treatment than that of local cows. Parity-2 cows showed higher estrus sign than that of other parities. However, the pregnancy rates were higher significantly (p<0.05) in parity-2 and parity ≥4 cows than that of parity-0, parity-1 and parity-3 cows. The pregnancy rate was also found higher in case of 4 to <5 years old cows than that of 2 to <3, 3 to <4, 5 to <6, and ≥6 years old. It may conclude that the hormonal regimen increases the pregnancy rate as well as decreases the undesired waiting of estrus and conception. Further study with more sample size will reveal the more effective treatment for cows at the coastal areas of Bangladesh.

Reproduction of the Roman snail (Helix pomatia L.) from a local natural population in farm conditions and in a natural habitat

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Maciej Ligaszewski ◽  
Przemysław Pol
Keyword(s):  
Natural Population ◽  
Natural Habitat ◽  
Local Population ◽  
Helix Pomatia ◽  
Second Phase ◽  
Animal Reproduction ◽  
Snail Helix Pomatia ◽  
June July ◽  
A Site

AbstractThe aim of this study was to compare the quality of clutches and reproduction results of two groups of Roman snails (Helix pomatia) from the same local population, laying eggs simultaneously in semi-natural farm conditions and in a natural habitat. The study material were Roman snails aged 2 or more years which had entered the third phenological season of their life and thus the first season of sexual maturity. Observations were conducted at an earthen enclosure in a greenhouse belonging to the experimental farm for edible snails at the National Research Institute of Animal Reproduction in Balice near Kraków (Poland) as well as at a site where a local population naturally occurs in the uncultivated park surrounding the Radziwiłł Palace. In the June-July season, differences among such parameters as weight of clutch, number of eggs in clutch, mean egg weight, and hatchling percentage when compared to the total number of eggs in the clutch were compared. It was determined that clutches of eggs from the natural population laid in the greenhouse were of lesser weight (P<0.01), contained fewer eggs (P<0.05), and the mean weight of individual eggs was less (P<0.05) than in clutches laid simultaneously in a natural habitat. Both in the greenhouse and the natural habitat, in the first phase of laying eggs (June) the weight of the clutch and number of eggs its contained were greater than in the second phase (July). However, only for snails laying eggs in the greenhouse were these differences statistically significant (P<0.05) and highly significant (P<0.01), respectively. Statistically significant differences were not observed in hatchling percentage between eggs laid in the greenhouse and the natural habitat. The lower number of eggs laid in the farmed conditions of the greenhouse was successfully compensated for by the absence of mass destruction by rodents which occurred in the natural habitat.

HISTORY OF MEDICINE DEVELOPMENT IN TURKISTAN

2020 ◽  
Vol 3 (3) ◽  
pp. 63-67
Author(s):  
Mamarazok Tagaev ◽  
Keyword(s):  
History Of Medicine ◽  
Local Population ◽  
Russian Empire ◽  
Medicine Development ◽  
History Of ◽  
Russian Military ◽  
The Russian Empire

In the article, after the conquest of the Russian Empire in the province, hospitals were opened for the Russian military and turned them into a hospital. Opened hospitals in Tashkent, Samarkand and Kattakurgan and outpatients for women and men. However,the local population, fearing doctors in uniform, did not want to contact them and turned to healers and paramedics

The Antonov rebel detachments in the territory of the Balashov uyezd of the Saratov gubernia (1920–1921)

2020 ◽  
pp. 45-51
Author(s):  
Sergei V. Lyovin
Keyword(s):  
Civil War ◽  
Local Population ◽  
Local History ◽  
Local Authorities ◽  
Archival Material ◽  
History Of ◽  
The Way

The Civil War is one of the largest tragedies in the history of our country. One of its dramatic episodes is the rebel movement led by A.S. Antonov which took place in the Tambov gubenia in 1920–1921 and was brutally suppressed by the Bolsheviks. Its scope is evidenced by the fact that it went beyond the borders of the Tambov gubernia. Separate detachments of Antonovites from the autumn of 1920 to the summer of 1921 raided the territory of the Balashov uyezd of the neighboring Saratov gubernia. The paper attempts to consider the way the uyezd authorities fought the rebels and the way civilians treated them. On the basis of an analysis of the local archival material most of which has not yet been put into scientific circulation, periodicals and the local history literature the author comes to the following conclusion: every time the invasions of Antonov’s detachments into the territory of the Balashov uyezd were so rapid that the local authorities did not manage to organize a proper rebuff, and the peasants, for the most part, supported the rebels since they saw spokesmen and defenders of their interests in them. Only frequent requisitions of peasants’ property by Antonovites as well as the replacement of the surplus appropriation system (Prodrazvyorstka) by the tax in kind (Prodnalog) led to the fact that since the spring of 1921 the support of the rebels by the local population ceased.

The Reformation of Prophecy

2018 ◽  
Author(s):  
G. Sujin Pak
Keyword(s):  
Old Testament ◽  
Word Of God ◽  
Priesthood Of All Believers ◽  
Beliefs And Practices ◽  
The People ◽  
The Reformation ◽  
History Of ◽  
A Site ◽  
Developmental Analysis ◽  
Sacred History

The Reformation of Prophecy presents and supports the case for viewing the prophet and biblical prophecy as a powerful lens by which to illuminate many aspects of the reforming work of the Protestant reformers in the sixteenth and seventeenth centuries. It provides a chronological and developmental analysis of the significance of the prophet and biblical prophecy across leading Protestant reformers in articulating a theology of the priesthood of all believers, a biblical model of the pastoral office, a biblical vision of the reform of worship, and biblical processes for discerning right interpretation of Scripture. Through the tool of the prophet and biblical prophecy, the reformers framed their work under, within, and in support of the authority of Scripture—for the true prophet speaks the Word of God alone and calls the people, their worship and their beliefs and practices, back to the Word of God. The book also demonstrates how interpretations and understandings of the prophet and biblical prophecy contributed to the formation and consolidation of distinctive confessional identities, especially around differences in their visions of sacred history, Christological exegesis of Old Testament prophecy, and interpretation of Old Testament metaphors. This book illuminates the significant shifts in the history of Protestant reformers’ engagement with the prophet and biblical prophecy—shifts from these serving as a tool to advance the priesthood of all believers to a tool to clarify and buttress clerical identity and authority to a site of polemical-confessional exchange concerning right interpretations of Scripture.

The Intrinsic Rate of Natural Increase in a Pond Snail (Physa gyrina Say)

1954 ◽  
Vol 88 (842) ◽  
pp. 353-359 ◽  
Author(s):  
Robert M. DeWitt
Keyword(s):  
Intrinsic Rate ◽  
Natural Increase ◽  
Pond Snail ◽  
Physa Gyrina

scholarly journals Elevated temperature and browning increase dietary methylmercury, but decrease essential fatty acids at the base of lake food webs

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pianpian Wu ◽  
Martin J. Kainz ◽  
Fernando Valdés ◽  
Siwen Zheng ◽  
Katharina Winter ◽  
...  
Keyword(s):  
Climate Change ◽  
Fatty Acids ◽  
Organic Matter ◽  
Food Webs ◽  
Essential Fatty Acids ◽  
Trophic Levels ◽  
Climate Change Scenarios ◽  
Essential Nutrients ◽  
Aquatic Food Webs ◽  
Aquatic Food

AbstractClimate change scenarios predict increases in temperature and organic matter supply from land to water, which affect trophic transfer of nutrients and contaminants in aquatic food webs. How essential nutrients, such as polyunsaturated fatty acids (PUFA), and potentially toxic contaminants, such as methylmercury (MeHg), at the base of aquatic food webs will be affected under climate change scenarios, remains unclear. The objective of this outdoor mesocosm study was to examine how increased water temperature and terrestrially-derived dissolved organic matter supply (tDOM; i.e., lake browning), and the interaction of both, will influence MeHg and PUFA in organisms at the base of food webs (i.e. seston; the most edible plankton size for zooplankton) in subalpine lake ecosystems. The interaction of higher temperature and tDOM increased the burden of MeHg in seston (< 40 μm) and larger sized plankton (microplankton; 40–200 μm), while the MeHg content per unit biomass remained stable. However, PUFA decreased in seston, but increased in microplankton, consisting mainly of filamentous algae, which are less readily bioavailable to zooplankton. We revealed elevated dietary exposure to MeHg, yet decreased supply of dietary PUFA to aquatic consumers with increasing temperature and tDOM supply. This experimental study provides evidence that the overall food quality at the base of aquatic food webs deteriorates during ongoing climate change scenarios by increasing the supply of toxic MeHg and lowering the dietary access to essential nutrients of consumers at higher trophic levels.

scholarly journals Just Mothering: Amy Coney Barrett and the Racial Politics of American Motherhood

Laws ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 36
Author(s):  
H. Howell Williams
Keyword(s):  
Middle Class ◽  
Political Development ◽  
American Political Development ◽  
White Family ◽  
Public And Private ◽  
Close Analysis ◽  
History Of ◽  
Republican Motherhood ◽  
A Site ◽  
Confirmation Hearings

Justice Amy Coney Barrett’s nomination and confirmation featured frequent references to her role as a mother. This article situates these references within the trajectory of American political development to demonstrate how motherhood operates as a mechanism for enforcing a white-centered racial order. Through a close analysis of both the history of politicized motherhood as well as Barrett’s nomination and confirmation hearings, I make a series of claims about motherhood and contemporary conservatism. First, conservatives stress the virtuousness of motherhood through a division between public and private spheres that valorizes the middle-class white mother. Second, conservatives emphasize certain mothering practices associated with the middle-class white family. Third, conservatives leverage an epistemological claim about the universality of mothering experiences to universalize white motherhood. Finally, this universalism obscures how motherhood operates as a site in which power distinguishes between good and bad mothers and allocates resources accordingly. By attending to what I call the “republican motherhood script” operating in contemporary conservatism, I argue that motherhood is an ideological apparatus for enforcing a racial order premised on white protectionism.

scholarly journals ‘Policing Is a Profession of the Heart’: Evangelicalism and Modern American Policing

Religions ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 194
Author(s):  
Aaron Griffith
Keyword(s):  
Law Enforcement ◽  
Police Officers ◽  
American Politics ◽  
Short History ◽  
Carceral State ◽  
American Life ◽  
Politics And Culture ◽  
American Law ◽  
History Of ◽  
A Site

Though several powerful explorations of modern evangelical influence in American politics and culture have appeared in recent years (many of which illumine the seeming complications of evangelical influence in the Trump era), there is more work that needs to be done on the matter of evangelical understandings of and influence in American law enforcement. This article explores evangelical interest and influence in modern American policing. Drawing upon complementary interpretations of the “antistatist statist” nature of modern evangelicalism and the carceral state, this article offers a short history of modern evangelical understandings of law enforcement and an exploration of contemporary evangelical ministry to police officers. It argues that, in their entries into debates about law enforcement’s purpose in American life, evangelicals frame policing as both a divinely sanctioned activity and a site of sentimental engagement. Both frames expand the power and reach of policing, limiting evangelicals’ abilities to see and correct problems within the profession.

Sign in / Sign up

Export Citation Format

Share Document