Reproductive Guilds of Percids: Results of the Paleogeographical History and Ecological Succession

1977 ◽  
Vol 34 (10) ◽  
pp. 1910-1921 ◽  
Author(s):  
Eugene K. Balon ◽  
Walter T. Momot ◽  
Henry A. Regier
Keyword(s):  
Key Words ◽  
Oxygen Content ◽  
Reproductive Behavior ◽  
Early Ontogeny ◽  
Ecological Succession ◽  
Spawning Ground ◽  
Short Term ◽  
Lake Metabolism ◽  
Reproductive Guilds

A holistic picture of the Percidae is attempted, exploring the theory of reproductive guilds. Seven guilds encompass all 163 species; forms related closely in terms of Linnean taxonomy may belong to very different guilds. Adaptations in spawning ground selection, other reproductive behavior and morpho-physiological features of early ontogeny all center on respiration and protection against predators. The adaptation of guarding enables survival in low densities as well as in an environment with decreasing oxygen content, or enables invasion of such an environment. The paleogeographical origin and distribution of percid fishes are reconstructed along these lines. Over the short term, guild succession is enhanced by changes in fluvial gradient and lake metabolism. Key words: Percidae, succession, reproductive guilds

A hybrid model for short-term dissolved oxygen content prediction

2021 ◽  
Vol 186 ◽  
pp. 106216
Author(s):  
Jiande Huang ◽  
Shuangyin Liu ◽  
Shahbaz Gul Hassan ◽  
Longqin Xu ◽  
Cifeng Huang
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Content ◽  
Hybrid Model ◽  
Short Term

I limiti del tempo in un tempo di limiti

2009 ◽  
pp. 55-62
Author(s):  
Fabrizio Rizzi
Keyword(s):  
Health System ◽  
Key Words ◽  
Community Service ◽  
National Health ◽  
National Health System ◽  
Short Term ◽  
Intellectual Honesty ◽  
Life Itself ◽  
Environmental Limits

- This article recounts the doubts and fears of an experienced analyst who is now an apprentice acrobat. He is forced to keep himself tiredly balanced between psychological and physical limits imposed by age, restrictions introduced by the National Health System and categories of patients who have precedence over others. He cannot receive all of the patients who ask for him and even those who he does receive will have to be discharged in the short term. Explaining to them, with intellectual honesty, that the community service has rules that limit his wishes as well. What can this be if not acrobatics? In the end it means combining the contradictory but perhaps also the most real aspects of life itself. [KEY WORDS: desires, personal and environmental limits, truth of the therapist]

Food, stress, and reproduction: Short-term fasting alters endocrine physiology and reproductive behavior in the zebra finch

2010 ◽  
Vol 58 (2) ◽  
pp. 214-222 ◽  
Author(s):  
Sharon E. Lynn ◽  
Teresa B. Stamplis ◽  
William T. Barrington ◽  
Nicholas Weida ◽  
Casey A. Hudak
Keyword(s):  
Zebra Finch ◽  
Reproductive Behavior ◽  
Short Term ◽  
Food Stress

Reproductive Behavior during the Pre-Transitional Period: Evidence from Rural Bologna

2012 ◽  
Vol 42 (4) ◽  
pp. 615-643 ◽  
Author(s):  
Rosella Rettaroli ◽  
Francesco Scalone
Keyword(s):  
Reproductive Behavior ◽  
Multivariate Analyses ◽  
Premature Death ◽  
Transitional Period ◽  
Price Effect ◽  
Short Term ◽  
Born Child ◽  
Micro Level ◽  
Daily Wage ◽  
Wage Earners

A longitudinal, micro-level study of the effect of socioeconomic transformations on fertility mechanisms in the rural hinterland of Bologna between 1818 and 1900 (the beginning of the demographic transition) demonstrates that the premature death of a last-born child reduces the interval between two consecutive childbirths. Thus does it confirm the importance of breast-feeding in determining birth spacing. Women living in complex sharecropping households experienced a significantly higher risk of childbirth than did women in families headed by daily wage earners. In addition, the reproductive behavior of sharecroppers seemed to be substantially invariant to short-term fluctuations in prices, whereas the laborers' group experienced a negative price effect. Both descriptive and multivariate analyses indicate a slight and gradual decrease in fertility levels during the period in question.

Technique for Tagging Small Fish with I131 for Evaluation of Predator–Prey Relationships

1978 ◽  
Vol 35 (1) ◽  
pp. 143-145 ◽  
Author(s):  
Gerard J. FitzGerald ◽  
Miles H. A. Keenleyside
Keyword(s):  
Content Analysis ◽  
Key Words ◽  
Stomach Content ◽  
Stomach Content Analysis ◽  
Small Fish ◽  
Short Term ◽  
Predator Prey ◽  
Cichlasoma Nigrofasciatum ◽  
Quantitative Studies ◽  
Convict Cichlids

Experiments to test the feasibility of using radioactive I131 as a technique for evaluation of conspecifïc predation on fry by adult convict cichlids (Cichlasoma nigrofasciatum) are described. The technique is useful for short-term quantitative studies of predator–prey interactions where it is not possible to observe and quantify predation directly or where stomach content analysis of adults is not feasible. Key words: radioactive tagging, predator–prey interactions, Cichlasoma nigrofasciatum

SPENT CANOLA OIL BLEACHING CLAYS: POTENTIAL FOR TREATMENT OF T-2 TOXICOSIS IN RATS AND SHORT-TERM INCLUSION IN DIETS FOR IMMATURE SWINE

1984 ◽  
Vol 64 (3) ◽  
pp. 725-732 ◽  
Author(s):  
T. K. SMITH
Keyword(s):  
Body Weight ◽  
Key Words ◽  
Vegetable Oil ◽  
Canola Oil ◽  
Bentonite Clay ◽  
Feed Consumption ◽  
Residual Oil ◽  
Trichothecene Mycotoxin ◽  
Short Term ◽  
Growth Depression

Experiments were conducted to determine the potential for spent vegetable oil bleaching clays to overcome growth depression and feed refusal caused by T-2 toxin, a Fusarium trichothecene mycotoxin. Rats were fed spent canola oil bleaching clays at 0.0, 2.5, 5.0, 7.5 and 10.0% of the diet with and without 3 mg T-2 toxin per kilogram of feed. The bleaching clays largely overcame depressions in body weight and feed consumption caused by T-2 toxin over the 2-wk experiment. Feeding defatted clay at levels corresponding to the levels fed in the first experiment produced similar results while feeding residual oil had very little effect. Feeding spent bentonite produced the same results except that the residual oils were slightly more effective at overcoming T-2 toxicosis than the residual canola oil. Rats were than fed the same levels of spent canola oil bleaching clays for 2 wk and were orally dosed with [3H] T-2 toxin. The fraction of the dose excreted in feces rose consistently with the level of spent canola oil bleaching clays but these increases were not statistically significant. In a final experiment, 48 barrows were fed 0, 5 and 10% spent canola oil bleaching clays for 17 days. Growth and feed consumption were not affected by the level fed. It was concluded that spent canola oil bleaching clays can be used to lessen feed refusal due to T-2 toxin in rat diets. This produce can also be fed to growing swine for short periods without affecting performance. Key words: Rats, swine, T-2 toxin, canola oil, bentonite, clay

Design properties of laterally loaded nailed or bolted wood joints

1988 ◽  
Vol 15 (4) ◽  
pp. 633-643 ◽  
Author(s):  
Ian Smith ◽  
Luke R. J. Whale ◽  
Colin Anderson ◽  
Barry O. Hilson ◽  
Peter D. Rodd
Keyword(s):  
Mechanical Properties ◽  
Key Words ◽  
Bolted Joints ◽  
Design Codes ◽  
Short Term ◽  
Limit States ◽  
Design Solutions ◽  
Reliable Knowledge ◽  
Laterally Loaded

This paper summarizes the output from a long-term project commenced in 1980 with the objective of providing reliable knowledge of the mechanical properties of nailed or bolted joints subjected to short-term lateral loadings. Motivation was the development on an international basis of probability-based partial coefficients limit states design codes for structural timberwork. Comparisons are presented between design solutions produced by applying this research and those by the use of contemporary "soft conversion" international partial coefficients limit states design codes that were calibrated from previously available data. Differences relate primarily to design of bolted joints. It is shown that there is an established acceptance in Canada of the approach adopted. Key words: wood, joints, nails, bolts, design.

Multiple captures of fulvous harvest mice (Reithrodontomys fulvescens) and northern pygmy mice (Baiomys taylori): evidence for short-term co-traveling

2012 ◽  
Vol 90 (3) ◽  
pp. 313-319
Author(s):  
N.S. Green ◽  
C.E. Early ◽  
L.K. Beard ◽  
K.T. Wilkins
Keyword(s):  
Sex Ratio ◽  
Small Mammals ◽  
Reproductive Behavior ◽  
Capture Probability ◽  
Pair Bonding ◽  
Sex Composition ◽  
Short Term ◽  
Trap Bias

Multiple captures of small mammals (finding >1 animal in a single trap) are often used to infer pair-bonding activity in arvicoline and cricetine rodents. We analyzed data from a 2-year trapping study to determine whether fulvous harvest mice ( Reithrodontomys fulvescens J.A. Allen, 1894) and (or) northern pygmy mice (Baiomys taylori (Thomas, 1887)) travel in mixed-sex mated pairs. A significant majority of multiple capture events (MCEs) in R. fulvescens were mixed-sex, whereas sex composition of pairs in B. taylori did not differ from random. Multiple capture probability was significantly positively related to abundance and unrelated to sex ratio in both species. Multiple captures of B. taylori were more common in winter, suggesting that individuals may associate to huddle for warmth. Masses of singly captured and multiply captured individuals were not significantly different in either species, contraindicating trap bias. Only one co-captured mixed-sex pair was recaptured as a pair (in R. fulvescens) and several animals of both sexes in both species were co-captured with multiple individuals. We concluded that R. fulvescens co-travels with mates for variable lengths of time, but we found no evidence that multiple captures of B. taylori are related to reproductive behavior.

scholarly journals ПОПУЛЯРИЗАЦІЯ ПЕДАГОГІЧНОЇ ТА МЕТОДИЧНОЇ СКЛАДОВИХ У КОРОТКОСТРОКОВИХ ПРОГРАМАХ ПІДВИЩЕННЯ КВАЛІФІКАЦІЇ ДЛЯ ВИКЛАДАЧІВ ГАЛУЗЕВИХ ЗАКЛАДІВ ОСВІТИ: ІЗ ДОСВІДУ РОБОТИ НАУКОВО-ПРАКТИЧНОЇ ШКОЛИ-СЕМІНАРУ ТА КВАЛІФІКАЦІЙНОГО ТРЕНІНГУ «СУЧАСНІ ТЕХНОЛОГІЇ НАВЧАЛЬНОЇ ДІЯЛЬНСТІ ВИКЛАДАЧА ЗВО»

2021 ◽  
pp. 31-35
Author(s):  
О. О Резван
Keyword(s):  
Higher Education ◽  
Professional Development ◽  
Key Words ◽  
Higher Education Institutions ◽  
Professional Competencies ◽  
Advanced Training ◽  
Short Term ◽  
Professional Development Of Teachers ◽  
Scientific Practical

The article identifies practical approaches to solving the problem of professional development of teachers of higher education institutions; emphasis is placed on the effectiveness of teachers’ acquisition of professional competencies in the process of teaching in short-term thematic courses; the experience of the organization of advanced training of teachers in branch institution of higher education is presented. Key words: advanced training of teachers, short-term courses, forms of advanced training, scientific-practical seminar, qualification training

DIURNAL PATTERNS OF ESTROUS BEHAVIOR OF DAIRY COWS HOUSED IN A FREE STALL

1987 ◽  
Vol 67 (3) ◽  
pp. 605-614 ◽  
Author(s):  
E. AMYOT ◽  
J. F. HURNIK
Keyword(s):  
Sexual Behavior ◽  
Dairy Cows ◽  
Key Words ◽  
Reproductive Behavior ◽  
Time Lapse ◽  
Low Intensity ◽  
Diurnal Patterns ◽  
Incandescent Lamps ◽  
Estrous Behavior

Sixteen primiparous and fifteen multiparous cows housed in a free-stall area with slatted floor alley were observed continuously for 100 d postpartum using a time-lapse videorecorder. Low intensity (< than 3 lx) red lights were used for nocturnal illumination. Natural daylight from an existing window and incandescent lamps provided daytime illumination (12–52 lx). The analyses focused on the periestrous period beginning 2 d prior to and ending 2 d after estrus. Onset of true estrus was most frequent between 1200 and 1800 h in the primiparous group (35%) and between 0600 and 1200 h in the multiparous group (37%). A nadir of true estrus onset (15%) occurred between 1800 and 2400 h in both groups. The predominant hours of estrual activities occurred during daylight, between 1500 and 1800 h in the primiparous group and between 0900 and 1100 h in the multiparous group. In general, the daily distribution of estrous activities had a quadratic shape and these shapes or patterns of estrous activities were remarkably consistent among cows and estruses. Among the monitored estrual activities, mounting, sniffing and chin pressed in the primiparous group, and chin pressing, chin pressed, mounting, mounted and sniffed in the multiparous group, were found to best discriminate the cows' behaviors on estrous day with their behaviors on the 2 days pre- and postestrus. Key words: Reproductive behavior, sexual behavior, estrous behavior, cow behavior, cow (dairy)

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