scholarly journals LIFE-HISTORY AND DESCRIPTION OF THE STRAWBERRY ALEYRODES, ALEYRODES PACKARDI, N. SP

1903 ◽  
Vol 35 (2) ◽  
pp. 25-35 ◽  
Author(s):  
Austin. W. Morrill
Keyword(s):  
Life History ◽  
Critical Study ◽  
Agricultural College ◽  
Structural Differences ◽  
The Common ◽  
Entomological Laboratory

This species has hitherto been considered identical with Aleyrodes vaporariorum, the common greenhouse Aleyrodes of the tomato, cucumber, etc. A critical study of all stages of both the greenhouse Aleyrodes and the strawberry Aleyrodes, made at the Entomological Laboratory of the Massachusetts Agricultural College, has resulted in finding structural differences between the two species in all the stages, except the egg and adult.

scholarly journals Contributions to Management Strategies in the NE Atlantic Regarding the Life History and Population Structure of a Key Deep-Sea Fish (Mora moro)

Biology ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 522
Author(s):  
Régis Santos ◽  
Wendell Medeiros-Leal ◽  
Osman Crespo ◽  
Ana Novoa-Pabon ◽  
Mário Pinho
Keyword(s):  
Population Structure ◽  
Life History ◽  
Deep Sea ◽  
Management Strategies ◽  
Size Composition ◽  
Large Size ◽  
The Common ◽  
Fishing Impacts ◽  
Sea Fish

With the commercial fishery expansion to deeper waters, some vulnerable deep-sea species have been increasingly captured. To reduce the fishing impacts on these species, exploitation and management must be based on detailed and precise information about their biology. The common mora Mora moro has become the main deep-sea species caught by longliners in the Northeast Atlantic at depths between 600 and 1200 m. In the Azores, landings have more than doubled from the early 2000s to recent years. Despite its growing importance, its life history and population structure are poorly understood, and the current stock status has not been assessed. To better determine its distribution, biology, and long-term changes in abundance and size composition, this study analyzed a fishery-dependent and survey time series from the Azores. M. moro was found on mud and rock bottoms at depths below 300 m. A larger–deeper trend was observed, and females were larger and more abundant than males. The reproductive season took place from August to February. Abundance indices and mean sizes in the catch were marked by changes in fishing fleet operational behavior. M. moro is considered vulnerable to overfishing because it exhibits a long life span, a large size, slow growth, and a low natural mortality.

Life History and Demography of the Common Mud Turtle Kinosternon Subrubrum in South Carolina, USA

Ecology ◽  
1991 ◽  
Vol 72 (6) ◽  
pp. 2218-2231 ◽  
Author(s):  
Nat B. Frazer ◽  
J. Whitfield Gibbons ◽  
Judith L. Greene
Keyword(s):  
South Carolina ◽  
Life History ◽  
Mud Turtle ◽  
The Common ◽  
Kinosternon Subrubrum

scholarly journals The life history of Hepatozoon leptodactyli (Lesage, 1908) Pessoa, 1970: a parasite of the common laboratory animal: the frog of the genus Leptodactylus

1973 ◽  
Vol 71 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Sylvio Celso Goncalves da Costa ◽  
Samuel B. Pessoa ◽  
Neize de Moura Pereira ◽  
Tania Colombo
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Life History ◽  
Laboratory Animal ◽  
Peripheral Circulation ◽  
Experimental Conditions ◽  
History Of ◽  
The Central Nervous System ◽  
The Common ◽  
Common Laboratory

The main object of the present paper is to furnish a brief account to the knowledgement of Protozoa parasitic in common Brazilian frog of the genus Leptodactylus for general students in Zoology and for investigators that use this frog as a laboratory animal. Hepatozoon leptodactyli (Haemogregarina leptodactyli) was found in two species of frogs - Leptodactylus ocellatus and L. pentadactylus - in which develop schizogony whereas sporogony occurs in the leech Haementeria lutzi as was obtainded in experimental conditions. Intracellular forms have been found in peripheral circulation, chiefly in erythrocytes, but we have found them in leukocytes too. Tissue stages were found in frog, liver, lungs, spleen, gut, brain and heart. The occurence of hemogregarine in the Central Nervous System was recorded by Costa & al,(13) and Ball (2). Some cytochemical methods were employed in attempt to differentiate gametocytes from trophozoites in the peripheral blood and to characterize the cystic membrane as well. The speorogonic cycle was developed in only one specie of leech. A brief description of the parasite is given.

scholarly journals Islamophobia The New Dimensions In 21st Century

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Dr. Rani Erum
Keyword(s):  
Life History ◽  
Present State ◽  
21St Century ◽  
Future Prospects ◽  
Human Psychology ◽  
The World ◽  
The Future ◽  
Unique Approach ◽  
The Common ◽  
Harmful Effects

Anti-Muslim emotions are not new for the world. It was present since the rise of Islam. West was furious after facing Muslims in battle ground and constantly defeated by those who were less equipped but obtained high morals. Initially they were frightened due to the novelty and unique approach of faith and its execution, therefore, they try to fabricate the original manuscripts, making false stories and molesting the last prophet’s life history. Islamophobia transformed after 9/11 and become more intensified and dangerous. It effected the common men worldwide without any boundaries. The respective research is based on the fact that hatred is the negative notion whether it related with nobility or wicked perception. It creates harmful effects on human psychology which subsequently created abusive mindset and actions. When any form of ideology identified as phobia means uncontrolled envy combine with the concept and turn it into a form of frenzied connotation. The fight between East and West was ancient which now convert among religions particularly Islam and others. The research is intend to provide the journey of anti-Islamism from past to present as well its significant elements and its present state. It also discusses the future prospects of clash of religions.  

The ecology and life history of the common frog

1962 ◽  
Vol 6 (3) ◽  
pp. 253
Author(s):  
G.A. Kerkut
Keyword(s):  
Life History ◽  
Common Frog ◽  
History Of ◽  
The Common

“To Spread Throughout the Land, an Army of Practical Men”

2017 ◽  
Author(s):  
Charles Dorn
Keyword(s):  
Higher Education ◽  
Nineteenth Century ◽  
Common Good ◽  
Education Institution ◽  
Colleges And Universities ◽  
The State ◽  
Technical Knowledge ◽  
Antebellum Era ◽  
Agricultural College ◽  
The Common

This chapter discusses the emergence of a social ethos of practicality in higher education by the end of the nineteenth century. Throughout the antebellum era, the expansion of scientific and technical knowledge joined with the rise of political populism to lead existing institutions to add practical studies to their curricula. Many advocates of practical studies, however, were not satisfied with simply incorporating courses or appending schools to already-established colleges and universities. They sought to break with tradition by establishing a new kind of higher-education institution, one that would teach students scientific and investigative principles while also requiring the application of those principles outside of the classroom, both on the farm and in the field. This new institutional type would contribute to the common good by being unprecedentedly accessible and affordable to agrarian and laboring youth. The chapter then looks at the establishment of the Agricultural College of the State of Michigan.

IX. On the life-history of spirillum

1878 ◽  
Vol 27 (185-189) ◽  
pp. 481-485
Keyword(s):  
Life History ◽  
Fresh Water ◽  
Physiological Laboratory ◽  
University College ◽  
History Of ◽  
The Common

Notwithstanding the numerous and fruitful researches which have been recently made into the life-history of Bacteria, our knowledge of the common and interesting curved and spiral forms— the Vibrio and Spirillum of Ehrenberg—has made little or no advance since his time, neither embryonic nor reproductive forms having ever been observed; while even the zooglœa phase, so characteristic of Bacterium and Bacillus, has only once been mentioned, and then in a different form. A fresh-water aquarium, which has been stagnating since last summer in the Physiological Laboratory of University College, con­tained in winter vast numbers of ordinary motile Spirillum. On recently re-examining the water, one zooglœa film after another having in the meantime formed on the surface, thickened, broken, and sunk, we found that these motile forms had almost disappeared, while the films consisted almost entirely of resting Spirillum in a gelatinous-looking matrix, similar to that of Bacterium and Bacillus . Among these were two or three apparently distinct kinds of filaments, some resting and colourless, others motile, and filled with highly refracting bright yellowish-brown spheres. Such a field is represented in fig. 1.

scholarly journals Flexibility of Heterocercal Tails: What Can the Functional Morphology of Shark Tails Tell Us about Ichthyosaur Swimming?

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
S B Crofts ◽  
R Shehata ◽  
B E Flammang
Keyword(s):  
Functional Morphology ◽  
Flexural Stiffness ◽  
Cross Sectional ◽  
Text Book ◽  
Structural Differences ◽  
Thresher Shark ◽  
Cross Sectional Profile ◽  
The Common ◽  
Sectional Profile ◽  
Tail Function

Synopsis The similarities between ichthyosaurs and sharks are a text-book example of convergence, and similarities in tail morphology have led many to theorize that they had similar swimming styles. The variation of ichthyosaur tail shapes is encompassed within the diversity of shark families. In particular early ichthyosaurs have asymmetrical tails like the heterocercal tails of carcharhinid sharks, while later occurring ichthyosaurs have lunate tails similar to those of lamnid sharks. Because it is not possible to measure ichthyosaur tail function, the goal of this study is to measure and compare the flexibility and stiffness of lunate and heterocercal shark tails, and to measure skeletal and connective tissue features that may affect tail flexibility. We measured flexibility in 10 species and focused on five species in particular, for dissection: one pelagic and one bottom-associated individual from each order, plus the common thresher shark (Alopias vulpinus), a tail-slapping specialist. As expected, lunate tails were overall less flexible than heterocercal tails and had greater flexural stiffness. Our results suggest that the cross-sectional profile of the skeletally supported dorsal lobe dictates flexural stiffness, but that changing tissue composition dictates flexural stiffness in the ventral lobe. We also found structural differences that may enable the tail slapping behavior of the common thresher shark. Finally, we discuss how our morphological measurements compare to ichthyosaur measurements from the literature; noting that similarities in functional morphology suggest sharks may be a good analog for understanding ichthyosaur swimming biomechanics.

scholarly journals Warmer temperatures attenuate the classic offspring number and reproductive investment trade-off in the common lizard, Zootoca vivipara

2016 ◽  
Vol 12 (6) ◽  
pp. 20160101 ◽  
Author(s):  
Alexis Rutschmann ◽  
Donald B. Miles ◽  
Jean Clobert ◽  
Murielle Richard
Keyword(s):  
Life History ◽  
Environmental Conditions ◽  
Life History Traits ◽  
Natural Populations ◽  
Trade Off ◽  
Offspring Number ◽  
Common Lizard ◽  
Trade Offs ◽  
Zootoca Vivipara ◽  
The Common

Life-history traits involved in trade-offs are known to vary with environmental conditions. Here, we evaluate the response of the trade-off between ‘offspring number’ versus ‘energy invested per offspring’ to ambient temperature in 11 natural populations of the common lizard, Zootoca vivipara . We provide evidence at both the intra- and interpopulation levels that the trade-off is reduced with an increase in air temperature. If this effect enhances current individual fitness, it may lead to an accelerated pace of life in warmer environments and could ultimately increase adult mortality. In the context of global warming, our results advocate the need for more studies in natural populations to explore interactions between life-history traits' trade-offs and environmental conditions.

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