Factors affecting surfacing, respiration, and dive behaviour of bowhead whales, Balaena mysticetus, summering in the Beaufort Sea

1989 ◽  
Vol 67 (7) ◽  
pp. 1801-1815 ◽  
Author(s):  
Eleanor M. Dorsey ◽  
W. John Richardson ◽  
Bernd Würsig
Keyword(s):  
Human Disturbance ◽  
Multivariate Analyses ◽  
Beaufort Sea ◽  
The Other ◽  
Factors Affecting ◽  
Bowhead Whales ◽  
Dive Behaviour ◽  
Aerial Surveys ◽  
Highly Correlated ◽  
Over Time

Behaviour of bowhead whales summering in the Canadian Beaufort Sea in 1980–1984 was observed from an aeroplane circling at altitudes high enough to avoid disturbance (≥ 457 m). Factors that might affect surfacing and respiration behaviour were assessed with univariate and multivariate analyses. Calves (age < 1 year) were not considered. The interval between successive blows in a surfacing was more stable over time and over different activities than were the other variables but was significantly longer in surface-feeding whales. Surface feeders also made longer surfacings. The number of blows per surfacing and duration of surfacing were highly correlated, and both variables were more consistently correlated with the duration of the previous dive than with the duration of the subsequent dive. There were considerable interyear variations in respiration and surfacing characteristics that could not be attributed to any measured factor. Effects of water depth on number of blows per surfacing could not be separated from interyear effects, but duration of surfacing appeared to be greater in deeper water. Whales in groups had longer blow intervals, as did mothers with calves and socializing whales. Underwater blows were associated with socializing, at least at times, but their function is uncertain. The results have implications with regard to bowhead energetics, sightability during aerial surveys, and interpretation of behaviour in the presence of human disturbance.

scholarly journals Responses of pregnant ewes and young lambs to ovalbumin immunization, antiovalbumin antibody transfer to lambs, and temporal changes in antiovalbumin antibody1,2

2017 ◽  
Vol 1 (4) ◽  
pp. 585-591
Author(s):  
G. S. Lewis ◽  
S. Wang ◽  
J. B. Taylor
Keyword(s):  
Immune Response ◽  
Late Pregnancy ◽  
The Other ◽  
Factors Affecting ◽  
Time Interaction ◽  
Injection Type ◽  
Neonatal Lambs ◽  
Changes Over Time ◽  
Over Time ◽  
Original Type

Abstract Factors affecting the decay of maternally derived IgG and ability of neonatal lambs to produce protective amounts of their own IgG are not well understood. Thus, we conducted 3 experiments to quantify the 1) response of pregnant ewes to ovalbumin immunization, 2) antiovalbumin antibody (OV-IgG) transfer to lambs, 3) changes over time in OV-IgG in lambs, and 4) response of young lambs to ovalbumin immunization. In Exp. 1, ewes (n = 10/group) either received control (adjuvant + saline) or ovalbumin (ovalbumin + adjuvant + saline) injections at ≈ 42 and 14 d prepartum. Ovalbumin increased (P &lt; 0.001) ewe serum and colostrum OV-IgG. Serum OV-IgG was greater (P &lt; 0.0001) in lambs from ovalbumin-treated than in lambs from control ewes. In Exp. 2, lambs (n = 20/group), which were from ewes that had received ovalbumin prepartum, were given either control or ovalbumin injections on d 1 and 15 of age. From d 1 to 15, maternally derived OV-IgG was less (P &lt; 0.04) in ovalbumin-treated than in control lambs. After d 15, OV-IgG was greater (P &lt; 0.001) in ovalbumin-treated than in control lambs. In Exp. 3, lambs (n = 20/group), which were from ewes naïve to ovalbumin, received 1 of 4 treatments: 1) d-1 + d-15 control injections; 2) d-1 + d-15 ovalbumin; 3) d-28 + d-42 control; and 4) d-28 + d-42 ovalbumin. In d-1 + d-15 ovalbumin lambs, OV-IgG increased (P &lt; 0.001) from d 7 to 21 after treatment and then decreased (P &lt; 0.004) after d 28. In d-28 + d-42 ovalbumin lambs, OV-IgG increased (P &lt; 0.001) steadily until d 21 after treatment and then stabilized after d 21. At ≈ 159 d of age, lambs in each group received injections consistent with their original type. After the d-159 treatment, ovalbumin injection increased (P &lt; 0.0001) OV-IgG, and the injection type × time interaction was significant (P &lt; 0.0001). In d-28 + d-42 ovalbumin lambs, OV-IgG just before the d-159 injections was greater (P &lt; 0.006) than that in the other groups. In this study, late pregnant ewes produced OV-IgG after ovalbumin injections and then transferred OV-IgG to lambs via colostrum. Ovalbumin treatment of young lambs reduced circulating maternally derived OV-IgG, but it also induced an immune response in the lambs. Overall, our results support recommendations to vaccinate ewes against common pathogens during late pregnancy and to ensure that lambs receive adequate colostrum soon after birth.

What's mine is yours: Stable variation and language change in Ancient Egyptian possessive constructions

2017 ◽  
Vol 62 (4) ◽  
pp. 639-660
Author(s):  
Shayna Gardiner
Keyword(s):  
Language Change ◽  
Multivariate Analyses ◽  
Continuous Variable ◽  
Change Over Time ◽  
Factors Affecting ◽  
Ancient Egyptian ◽  
Possessive Constructions ◽  
Stable Variation ◽  
Over Time

AbstractVariation is described as two or more variants competing for finite resources. In this model, two outcomes are possible: language change or specialization. Specialization can be broken down further: specialization for different functions, and partial specialization – stable variation. In this paper, I analyze the differences between stable variation and language change using the two variables present in Ancient Egyptian possessive constructions. Observing four Egyptian possessive variants, split into two groups with two variants each – clitic possessor variants and full nominal possessor variants – for a total of 2251 tokens, I compare factors affecting variant choice in each possessive group. Results of distributional and multivariate analyses indicate that a) change over time occurs in clitic possession, while stable variation occurs with noun variants; and b) different kinds of factors govern the two sets: the continuous variable phrase complexity affects variant choice in nominal possession, but does not affect the clitic variants.

Factors Affecting Distribution of Gulls (Larus spp.) on Two New Jersey Coastal Bays

1987 ◽  
Vol 14 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Joanna Burger ◽  
Joan Galli
Keyword(s):  
New Jersey ◽  
Human Disturbance ◽  
Dominant Species ◽  
Delaware Bay ◽  
The Other ◽  
Factors Affecting ◽  
Coastal Bays ◽  
Herring Gulls ◽  
Laughing Gulls

The distribution and abundance of gulls were examined on Raritan and Delaware Bays from 20 April to 26 October 1982. Gull numbers were affected by seasonal, tidal, weather-related, and human disturbance, factors on both Bays. Gulls comprised from about 40 to 60% of the avifauna on the census areas, and shorebirds accounted for most of the other individuals. Peak numbers of gulls were present on Delaware Bay from May through July, and on Raritan Bay in September. Laughing Gulls (Larus atricilla) were the dominant species on both Raritan (90%) and Delaware (70%) Bays, with Herring Gulls (L. argentatus) second in abundance.

Emotional Impact Feedback Changes How We Remember Negative Autobiographical Experiences

2010 ◽  
Vol 57 (5) ◽  
pp. 354-359 ◽  
Author(s):  
Melanie K. T. Takarangi ◽  
Deryn Strange
Keyword(s):  
Well Being ◽  
The Other ◽  
Personal Perspective ◽  
Emotional Impact ◽  
Potential Mechanism ◽  
Negative Experiences ◽  
Negative Memory ◽  
The Relationship ◽  
Negative Memories ◽  
Over Time

When people are told that their negative memories are worse than other people’s, do they later remember those events differently? We asked participants to recall a recent negative memory then, 24 h later, we gave some participants feedback about the emotional impact of their event – stating it was more or less negative compared to other people’s experiences. One week later, participants recalled the event again. We predicted that if feedback affected how participants remembered their negative experiences, their ratings of the memory’s characteristics should change over time. That is, when participants are told that their negative event is extremely negative, their memories should be more vivid, recollected strongly, and remembered from a personal perspective, compared to participants in the other conditions. Our results provide support for this hypothesis. We suggest that external feedback might be a potential mechanism in the relationship between negative memories and psychological well-being.

Seasonal diving and foraging behaviour of Eastern Canada-West Greenland bowhead whales

2020 ◽  
Vol 643 ◽  
pp. 197-217 ◽  
Author(s):  
SME Fortune ◽  
SH Ferguson ◽  
AW Trites ◽  
B LeBlanc ◽  
V LeMay ◽  
...  
Keyword(s):  
Climate Change ◽  
Late Summer ◽  
Calanoid Copepods ◽  
Eastern Canada ◽  
West Greenland ◽  
Bowhead Whales ◽  
Seasonal Movement ◽  
Dive Behaviour ◽  
Calanus Glacialis ◽  
Canada West

Climate change may affect the foraging success of bowhead whales Balaena mysticetus by altering the diversity and abundance of zooplankton species available as food. However, assessing climate-induced impacts first requires documenting feeding conditions under current environmental conditions. We collected seasonal movement and dive-behaviour data from 25 Eastern Canada-West Greenland bowheads instrumented with time-depth telemetry tags and used state-space models to examine whale movements and dive behaviours. Zooplankton samples were also collected in Cumberland Sound (CS) to determine species composition and biomass. We found that CS was used seasonally by 14 of the 25 tagged whales. Area-restricted movement was the dominant behaviour in CS, suggesting that the tagged whales allocated considerable time to feeding. Prey sampling data suggested that bowheads were exploiting energy-rich Arctic copepods such as Calanus glacialis and C. hyperboreus during summer. Dive behaviour changed seasonally in CS. Most notably, probable feeding dives were substantially shallower during spring and summer compared to fall and winter. These seasonal changes in dive depths likely reflect changes in the vertical distribution of calanoid copepods, which are known to suspend development and overwinter at depth during fall and winter when availability of their phytoplankton prey is presumed to be lower. Overall, CS appears to be an important year-round foraging habitat for bowheads, but is particularly important during the late summer and fall. Whether CS will remain a reliable feeding area for bowhead whales under climate change is not yet known.

Coevolution

2017 ◽  
Author(s):  
Avi Max Spiegel
Keyword(s):  
The Other ◽  
The Political ◽  
Over Time ◽  
Islamist Movements

This chapter seeks to understand how Islamist movements have evolved over time, and, in the process, provide important background on the political and religious contexts of the movements in question. In particular, it shows that Islamist movements coevolve. Focusing on the histories of Morocco's two main Islamist movements—the Justice and Spirituality Organization, or Al Adl wal Ihsan (Al Adl) and the Party of Justice and Development (PJD)—it suggests that their evolutions can only be fully appreciated if they are relayed in unison. These movements mirror one another depending on the competitive context, sometimes reflecting, sometimes refracting, sometimes borrowing, sometimes adapting or even reorganizing in order to keep up with the other.

Correspondances étymologiques, lexicales et sémantiques dans le processus de féminisation de noms de profession, métiers et activités dans les sociétés française et roumaine

2020 ◽  
Vol 65 (4) ◽  
pp. 401-422
Author(s):  
Estelle Variot
Keyword(s):  
The Other ◽  
Roman World ◽  
Other Hand ◽  
The One ◽  
Over Time

"Etymological, Lexical and Semantic Correspondences in the Process of Feminization of Professional Names, Trades and Activities in French and Romanian Societies. The feminization of thought represented by language and of its varieties in the Roman World has allowed to highlight some convergences that come from a common linguistic heritage, often from Greek and Latin and some hesitation about adapting society to its realities. The feminization of some words which comes from an ancient process illustrates on the one hand the potential of the language and on the other hand some constraints sometimes linked to the society itself, which creates transitional periods, between matching grammatical correction and the evolution of linguistic uses over time. The possibilities of lexical enrichment (internal creation or loan) show the means available in French and Romanian and some convergences in the area of derivation, of lexical units and their etymologies. The grammatical perspective and word constructing methods make it possible to give keys for the feminization of names of trades or professions. Likewise, recording entries in the lexicon, their evolution, their assimilation or sometimes their forgetfulness, for the benefit of new constructions highlight the existence of objective and subjective criteria which teach us a lot about society as a whole. Keywords: feminization of professions, internal and external enrichment, suffixal match, use of words, grammar, lexicon, French and Romanian."

The Values and Norms of Islam

2010 ◽  
Vol 1 (1) ◽  
pp. 1-19
Author(s):  
Ahmed Akgunduz
Keyword(s):  
Islamic Law ◽  
Legal Theory ◽  
The Other ◽  
Moral Norms ◽  
Simple Fact ◽  
Value System ◽  
Legal Norms ◽  
Islamic Legal Theory ◽  
The World ◽  
Over Time

AbstractIslamic Law is one of the broadest and most comprehensive systems of legislation in the world. It was applied, through various schools of thought, from one end of the Muslim world to the other. It also had a great impact on other nations and cultures. We will focus in this article on values and norms in Islamic law. The value system of Islam is immutable and does not tolerate change over time for the simple fact that human nature does not change. The basic values and needs (which can be called maṣlaḥa) are classified hierarchically into three levels: (1) necessities (Ḍarūriyyāt), (2) convenience (Ḥājiyyāt), and (3) refinements (Kamāliyyāt=Taḥsīniyyāt). In Islamic legal theory (Uṣūl al‐fiqh) the general aim of legislation is to realize values through protecting and guaranteeing their necessities (al-Ḍarūriyyāt) as well as stressing their importance (al‐ Ḥājiyyāt) and their refinements (taḥsīniyyāt).In the second part of this article we will draw attention to Islamic norms. Islam has paid great attention to norms that protect basic values. We cannot explain all the Islamic norms that relate to basic values, but we will classify them categorically. We will focus on four kinds of norms: 1) norms (rules) concerned with belief (I’tiqādiyyāt), 2) norms (rules) concerned with law (ʿAmaliyyāt); 3) general legal norms (Qawā‘id al‐ Kulliyya al‐Fiqhiyya); 4) norms (rules) concerned with ethics (Wijdāniyyāt = Aḵlāqiyyāt = Ādāb = social and moral norms).

Fostering Collaborative Autonomy: The Roles of Cooperative and Collaborative Learning

Relay Journal ◽  
2018 ◽  
pp. 360-381
Author(s):  
Gordon Myskow ◽  
Phillip A. Bennett ◽  
Hisako Yoshimura ◽  
Kyoko Gruendel ◽  
Takuto Marutani ◽  
...  
Keyword(s):  
Collaborative Learning ◽  
Cooperative Learning ◽  
Learner Autonomy ◽  
The Other ◽  
Learning Activities ◽  
Educational Context ◽  
Learning Approaches ◽  
Group Interactions ◽  
Collaborative Autonomy ◽  
Over Time

The distinction between Cooperative and Collaborative Learning approaches is not a clear one. Some use the terms interchangeably while others consider Cooperative Learning to be a type of Collaborative Learning. Still others clearly differentiate between them, characterizing Cooperative Learning as more highly structured in its procedures, involving a great deal of intervention by the teacher to plan and orchestrate group interactions. Collaborative Learning, on the other hand, presupposes some degree of learner autonomy－that groups can work effectively toward shared goals and monitor their own progress. This paper takes the view that the distinction between Cooperative and Collaborative Learning is a useful one and that both approaches can play valuable roles in fostering autonomous interaction. It argues that while Collaborative Learning formations may be the ultimate goal for teachers wishing to develop learner autonomy, Cooperative Learning is a valuable means for modeling the skills and abilities to help students get there. The discussion begins with an overview of the two approaches, focusing on their implementation in the Japanese educational context. It then presents seven highly structured Cooperative Learning activities and shows how they can be modified and extended over time to encourage more autonomous interaction.

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