The relationship of social vocalizations to surface behavior and aggression in the Hawaiian humpback whale (Megaptera novaeangliae)

1986 ◽  
Vol 64 (10) ◽  
pp. 2075-2080 ◽  
Author(s):  
Gregory K. Silber
Keyword(s):  
Surface Activity ◽  
Group Size ◽  
Social Dominance ◽  
Humpback Whale ◽  
Megaptera Novaeangliae ◽  
Adult Males ◽  
Surface Behavior ◽  
Relationship Of ◽  
Large Groups ◽  
The Relationship

Humpback whale (Megaptera novaeangliae) social vocalizations (nonsong sounds) were clearly related to whale group size and surface activity. Social sounds occurred almost exclusively in groups containing three or more whales and were rarely heard near single whales, pairs, or cow–calf groups. Large groups (3 to 20 individuals) vocalized at an overall mean rate of 43.1 ± 55.52 sounds per whale/h. Group size changed frequently and a dramatic increase in vocalization rate resulted when a new whale entered a group. Large groups engaged in flurries of surface activity, such as breaching, flipper- and tail-slapping, and underwater bubbling. Aggressive encounters resulted from male–male interaction. Social sounds probably acted to demonstrate aggression or agitation as adult males competed for temporary social dominance within the group and for proximity to the female. Likewise, visual displays may have been used as threats in close quarters and were apparently produced in conjunction with sounds to convey levels of aggression. Although other studies suggested that surface activity increased with group size, I found a negative correlation between activity and group size, both in the group as a whole and per individual. In contrast, social vocalizations per group increased with group size while the vocalization rate per individual did not vary significantly with increasing group size.

Short-term association patterns of humpback whale (Megaptera novaeangliae) groups on their feeding grounds in the southern Gulf of Maine

1991 ◽  
Vol 69 (12) ◽  
pp. 3005-3011 ◽  
Author(s):  
Mason T. Weinrich ◽  
Anne E. Kuhlberg
Keyword(s):  
Group Size ◽  
Adult Female ◽  
Adult Male ◽  
Gulf Of Maine ◽  
Humpback Whale ◽  
Distinct Pattern ◽  
Megaptera Novaeangliae ◽  
Adult Males ◽  
Feeding Ground ◽  
Social Nature

Humpback whale (Megaptera novaeangliae) feeding ground associations show a distinct pattern of group size and composition. Median group size was 2 (mean 1.67), and frequency decreased as group size increased. Adult females and juvenile males were observed in pairs significantly more often than singly, whereas adult males and juvenile females were more often alone. Adult female–female pairs occurred significantly more frequently than adult male–male pairs, and adult female – juvenile male pairs formed more frequently than adult male – juvenile female pairs. The majority of groups remained associated for at least 10 min; however, as the size of a group increased, so did its tendency to separate within that period. Adult male–male pair associations were of significantly shorter duration than female–female or male–female pair associations. It is hypothesized that adult males may avoid other males on the feeding ground as an extension of breeding competition. The energetic burden of reproduction, and hence the need to forage cooperatively to maximize efficiency, may account for the adult female's social nature. Juveniles of both sexes, less constrained by reproductive costs, exhibit less structured social behavior.

scholarly journals HUBUNGAN INDEKSMASSA TUBUH DAN LINGKAR PINGGANG DENGAN TEKANAN DARAH LAKI-LAKI DEWASA

2018 ◽  
Vol 9 (2) ◽  
pp. 193-199
Author(s):  
Tamariani Manullang
Keyword(s):  
Blood Pressure ◽  
Waist Circumference ◽  
Systolic Blood Pressure ◽  
Study Design ◽  
Computer Software ◽  
Adult Males ◽  
Cross Sectional ◽  
Relationship Of ◽  
The Relationship

Prevalence of hypertension in adult males was highest in PuskesmasBasuki Rahmat (16.2%) as many as 648 cases of hypertension patients which hasincreased compared to 2012 by 12% in cases of hypertension totaled 482 patients((Dinkes Kota, 2013). This study aims to determine the relationship of body massindex (BMI) and waist circumference (WC) with systolic blood pressure (BP) in adultmales in Puskesmas Basuki Rahmat Bengkulu City in 2015. The study design wasdescriptive analytic with cross sectional approach. Study location was in PuskesmasBasuki Rahmat City of Bengkulu. Samples were selected using purposive samplingtotalling 68 people. Criterias sample were being adult males who occupied inPuskesmas Basuki Rahmat City of Bengkulu, aged ≥ 18 years, agreed to beinterviewed,and able to communicate actively. Data were obtained include BMI, WCand systolic BP adult males and processed using computer software with pearsoncorrelation analysis.The results showed that there was relationship between BMI andsystolic BP (p = 0.0005; r = 0.395); between WC and systolic BP (p = 0.004 and r =0.347) in adult males. This study concluded that there was relationship between BMIand WC with systolic BP in adult males in Puskesmas Basuki Rahmat Bengkulu Cityin 2015.

scholarly journals Management and Economics: Question of Development Goals

Upravlenie ◽  
2017 ◽  
Vol 5 (2) ◽  
pp. 16-21
Author(s):  
Толкачев ◽  
P. Tolkachev
Keyword(s):  
Natural World ◽  
Complex Nature ◽  
Economic Management ◽  
Common Path ◽  
Fundamental Properties ◽  
Development Goals ◽  
Life On Earth ◽  
Relationship Of ◽  
Large Groups ◽  
The Relationship

The article discusses the relationship of economic management with the economic basis. The thesis is substantiated that effective economic management depends on economic ideal, to which society will strive to achieve. The world surrounding a person constantly retains its essential fundamental properties. And in this way it is perfect. Man spiritually assumes himself above nature. Potentially, he sees himself as a master of the natural world. However, acting in nature as an independent free force, he constantly reveals his imperfect. Because of his limited knowledge of the infinitely complex nature, everything that a person creates is imperfect. The path to perfection is the natural goal of man’s life on earth. However, on this common path, all nations and their large groups – civilizations – are moving along different roads. And in modern conditions, these differences have reached a dangerous feature – more and more the confrontation of civilizations is emerging. The historical feature of the Russian economic worldview is the absolute priority of moral ideals. Its deep economic ideals are not aggressive in relation to other countries and peoples. These ideals are in finding and multiplying of good. Therefore, potentially, Russia can counteract the negative scenario of the development of civilizational conflicts.

Group Performance Related to Size and Initial Ability of Group Members

1971 ◽  
Vol 28 (2) ◽  
pp. 551-557 ◽  
Author(s):  
Morton Goldman
Keyword(s):  
Group Size ◽  
Group Performance ◽  
Test Results ◽  
Ability Levels ◽  
Group Members ◽  
Paper And Pencil ◽  
Relationship Of ◽  
The Relationship ◽  
Different Levels

This study examined the relationship of group performance as a function of group size, where members within each group are of similar initial ability levels, but members in different groups are of different levels. 5 wk. later on the basis of a paper-and-pencil test, Ss were formed into groups composed of all high Ss, all medium Ss, and all low Ss, with size varying from 2 to 5 persons. Ss working as a group retook the same test. Results showed that groups with different initial levels have their own unique patterns of improvement as the size of the group increases.

scholarly journals Research groups: how big should they be?

2015 ◽  
Author(s):  
Isabelle Cook ◽  
Sam Grange ◽  
Adam Eyre-Walker
Keyword(s):  
Impact Factor ◽  
Group Size ◽  
The United Kingdom ◽  
Average Group ◽  
Using Data ◽  
Number Of Publications ◽  
Number Of Citations ◽  
The Impact ◽  
Large Groups ◽  
The Relationship

We have investigated the relationship between research group size and productivity in the life sciences in the United Kingdom using data from 398 principle investigators (PIs). We show that the number of publications increases linearly with group size, but that the slope is modest relative to the intercept, and that the relationship explains little of the variance in productivity. A comparison of the slope and intercept suggests that PIs contribute on average 5-times more productivity than an average group member and using multiple regression we estimate that post-doctoral researchers are approximately 3–times more productive than PhD students. We also find that the impact factor and the number of citations are both non-linearly related to group size such that there is a maximum. However, the relationships explain little of the variance and the curvatures are shallow so the impact factor and the number of citations do not greatly depend upon group size. The intercept is large relative to curvature suggesting that the PI is largely responsible for the impact factor and the number of citations from their group. Surprisingly we find this non-linear relationship for post-docs, but for PhD students we observe a slight but significant decrease in the impact factor. The results have important implications for the funding of research. Given a set number of Pis there is no evidence of diminishing returns in terms of the number of papers published and only a very weak cost to very large groups in terms of where those papers are published and the number of citations they receive. However, the results do suggest that it might be more productive to invest in new permanent members of faculty rather than additional post-docs and PhD students.

scholarly journals Surface activity of Humpback whales Megaptera novaeangliae (Cetacea, Mysticeti) on the northern coast of Bahia, Brazil

2020 ◽  
Vol 21 (1) ◽  
pp. 1-12
Author(s):  
Leonardo Leão Versiani ◽  
Cristiano Schetini Azevedo
Keyword(s):  
Surface Activity ◽  
Humpback Whale ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Northern Coast ◽  
Sea State ◽  
Surface Activities ◽  
Cloud Coverage

Surface activities of humpback whale groups were studied during the reproductive seasons of 2008, 2009 and 2010 on the northern coast of Bahia State, Brazil, near the district of Praia do Forte. The level of surface activity exhibited by 342 groups of whales was evaluated according to the sea state (measured on the Beaufort scale) and cloud coverage. Five behaviours were recorded: breaching, head slapping, tail slapping, pectoral flipper slapping and tail breaching. Most of the sightings occurred with a sea state classified on the Beaufort scale as 2, and with a cloud coverage of 26 to 50%. The most recorded level of surface activity was pectoral flipper slapping. The results showed that humpback whale behaviours do not seem to be influenced by the sea state or by cloud coverage.

Production, behaviour and welfare of growing pigs as influenced by drinker allocation and group size

1998 ◽  
Vol 1998 ◽  
pp. 114-114
Author(s):  
S. P. Turner ◽  
S. A. Edwards
Keyword(s):  
Group Size ◽  
Empirical Investigation ◽  
Growing Pigs ◽  
Production Performance ◽  
Light Weight ◽  
Large White ◽  
Commercial Grower ◽  
Heavy Medium ◽  
Large Groups ◽  
The Relationship

The requirement for water of growing pigs in large groups has been neglected. Current MAFF recommendations suggest one nipple drinker per 10 pigs, while farmers have often used a ratio of 1 per 20 animals. Neither approach is based on empirical investigation. The relationship between group size and the number of drinking points can not be assumed to be linear. The aim was to assess group size and the two conflicting ratios of drinkers for their effect on welfare, as measured by production performance, drinking and social behaviour.A total of 640 Large White x Landrace growing pigs (start weight 36kg) were housed in a fully slatted commercial grower house for five weeks. Four replicates were used and each animal was assigned to 1 of 4 treatments in a 2 x 2 factorial design of two group sizes (20 vs 60) and two ratios of nipple drinkers to pigs (1:10 vs 1:20). The groups of 20 comprised of pigs from 3 different pens, while 9 pens contributed to the groups of 60. The floor space per pig was maintained constant across treatments. Nine focal pigs (three each of heavy, medium and light weight) were selected from each pen.

The Relationship between Group Size and Performance on a Microcomputer Problem-Solving Task for Learning Handicapped and Nonhandicapped Students

1987 ◽  
Vol 3 (2) ◽  
pp. 171-187 ◽  
Author(s):  
Joan Lieber ◽  
Melvyn I. Semmel
Keyword(s):  
Problem Solving ◽  
Group Size ◽  
Task Engagement ◽  
Mathematics Problem Solving ◽  
Working Together ◽  
And Performance ◽  
Study Participants ◽  
Relationship Of ◽  
The Relationship ◽  
Problem Solving Task

Microcomputers are a powerful resource. Yet, in order for teachers to use this technology effectively, they need information about how specific variables might affect the performance of mildly handicapped as well as nonhandicapped learners. This study examines the effect of group size on performance measures, the relationship between group size and task engagement, and the relationship of task engagement to performance for both types of learners. Twenty learning handicapped and twenty nonhandicapped boys from upper elementary grades participated for ten minutes, three times per week for a four-week period on a mathematics problem solving task. Each student worked individually, with a handicapped partner, and with a nonhandicapped partner. Results indicated that it was as effective for students to work with a partner at the computer as it was for them to work alone. This finding occurred although dyads had half as much time at the computer as students working alone. Task engagement was also similar for children working in dyads or individually. Following each computer session a paper and pencil task was administered individually to the study participants. There was no difference in number correct related to group size; yet, at the most difficult task level, learning handicapped children solved more problems correctly following a computer session in which they worked with a partner. It appears that given a software program which requires students to apply mathematics skills to a new situation, it is effective to have two children working together at the computer.

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