Movements, recapture patterns, and factors affecting the return rate of carcharhinid and other sharks tagged off northern Australia

Between February 1983 and May 1985, ~10 500 sharks of 23 species were fin-tagged off northern Australia. Tagging concentrated on the commercially important Carcharhinus tilstoni and C. sorrah. Most recaptures were made in 1984 and 1985, but returns continued until May 1997. In all, 579 tags (5.5%) were recovered. Tag shedding was estimated to be low (0.025 year –1 for C. tilstoni) and tagging mortality was significantly lower for sharks caught by hand-line than by gill-net. Australian gill-netters, Taiwanese gill-netters (fishing in the Australian Fishing Zone) and Australian prawn trawlers accounted for most of the returns. The maximum distance between the release and recapture positions was >1100 km, but most returns were made within 50 km of the tagging site. Nearly all the releases were in inshore waters fished by Australian vessels. Although many recaptures were made by the offshore Taiwanese fishery, the Taiwanese fishing effort was much higher than for the inshore Australian fishery, so that relative to fishing effort, relatively few sharks moved from inshore to offshore waters.

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Biology of two commercially important carcharhinid sharks from northern Australia

Marine and Freshwater Research ◽

10.1071/mf9860671 ◽

1986 ◽

Vol 37 (6) ◽

pp. 671 ◽

Cited By ~ 41

Author(s):

JD Stevens ◽

PD Wiley

Keyword(s):

Stomach Contents ◽

Size At Maturity ◽

Northern Australia ◽

Gill Net ◽

Average Litter Size ◽

Commercially Important ◽

Mature Fish ◽

Reproductive Cycles ◽

Size At Birth ◽

Pelvic Fin

Sharks represent 78% of the total catch by weight of a Taiwanese surface gill-net fishery off northern Australia. Two carcharhinids, Carcharhrnus tilstoni (previously described as C. limbatus) and C. sorrah, together comprise 83% of this shark catch by number. C. tilstoni is distinguished from C. limbatus by differences in enzyme systems, vertebral counts, size data and pelvic fin coloration. Of the specimens of C. tilstoni and C. sorrah caught in the Arafura and Timor Seas from 1981 to 1983, 43% and 47%, respectively, were female; at birth these proportions were 46% and 50%, respectively. In both species, females tended to be relatively more abundant in catches of mature fish, except around March, when males predominated. In northern Australia, the usual size at maturity for C. tilstoni is 110 cm for males and 115 cm for females; for C. sorrah, it is 90 cm and 95 cm, respectively. Both species exhibit placental viviparity and have almost identical restricted reproductive cycles. Mating occurs in February-March, ovulation in March-April and the main parturition period is in January. The gestation period is 10 months and individual fish breed each year. The average litter size for both species is three. The size at birth is about 60 cm for C. tilstoni and 50 cm for C. sorrah. Stomach contents indicate that teleost fish are an important component of the diet of both species and there is some indication of a change in feeding depth with shark size.

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Gill-net mesh selectivities for two species of commercial carcharhinid shark taken in northern Australia

Marine and Freshwater Research ◽

10.1071/mf9940521 ◽

1994 ◽

Vol 45 (4) ◽

pp. 521 ◽

Cited By ~ 5

Author(s):

KJ McLoughlin ◽

JD Stevens

Keyword(s):

Gamma Distribution ◽

Distribution Model ◽

Northern Australia ◽

Gill Net ◽

Commercially Important

Experiments designed to estimate gill-net mesh selectivities for two species of commercially important sharks in northern Australia were carried out between 1983 and 1984. A gamma distribution model was used to obtain length-specific selectivities for Carcharhinus tilstoni and C. sorrah caught in nets with stretched-mesh sizes of 10, 15, 20 and 25 cm. Captured sharks were categorized as gilled or rolled (tangled) in the nets. The model provided a better fit to the data for C. sorrah than for C. tilstoni.

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Factors affecting the use of space by two rodent species in Brazilian Atlantic forest

Mammalia ◽

10.1515/mamm.2004.013 ◽

2004 ◽

Vol 68 (2-3) ◽

Cited By ~ 14

Author(s):

Helena Godoy Bergallo ◽

William E. Magnusson

Keyword(s):

Home Range ◽

Atlantic Forest ◽

Rodent Species ◽

Maximum Distance ◽

Brazilian Atlantic Forest ◽

Factors Affecting ◽

Use Of Space

The main purpose of this study was to determine whether the maximum distance traveled and home range area of

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Factors Affecting Students’ Choice for MBA Program in Kuwait Universities

International Journal of Business and Management ◽

10.5539/ijbm.v11n3p119 ◽

2016 ◽

Vol 11 (3) ◽

pp. 119 ◽

Cited By ~ 2

Author(s):

Abdullah AL-Mutairi ◽

Muna Saeid

Keyword(s):

Sources Of Information ◽

Mba Programs ◽

Factors Affecting ◽

Knowledge And Skills ◽

University Websites ◽

Mba Program ◽

Campus Visit ◽

Admission Requirements ◽

Structured Questionnaire ◽

Made In

The attempt is made in this study to identify students’ motives and reasons behind enrolling in a MBA program offered by universities operating in Kuwait. It also explores criterion used to select the program. To achieve these objectives, data were collected through a well-designed and structured questionnaire and pre-testing was carried out to examine the efficiency of the instrument. The study showed that the main reasons behind selecting the MBA program by students are to satisfy their personal concerns and improve their knowledge and skills. Moreover, the students used program alumni and campus visit as main sources of information followed by friends’ suggestions and university websites. When evaluating the MBA programs, the students cited overseas accreditation as the most used criteria followed by faculty reputation, institution reputation and admission requirements.

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HYGIENIC EVALUATION OF ILLUMINATION INDICES AND NON-IONIZING RADIATION AT EDUCATIONAL SITES OF HIGH SCHOOLS

Hygiene and Sanitation ◽

10.33029/0016-9900-2020-99-2-152-157 ◽

2020 ◽

Vol 99 (2) ◽

pp. 152-157

Author(s):

Elena Yu. Gorbatkova ◽

T. R. Zulkarnaev ◽

Z. A. Khusnutdinova ◽

U. Z. Ahmadullin ◽

A. A. Kazak ◽

...

Keyword(s):

Ionizing Radiation ◽

Educational Institutions ◽

Educational Organizations ◽

Higher Educational Institutions ◽

Factors Affecting ◽

Republic Of Bashkortostan ◽

Higher Educational ◽

The Republic ◽

The Government ◽

Made In

One of the significant factors affecting the condition of the students’ visual apparatus is an illumination level in the premises of educational organizations. Electromagnetic radiation arising from computers also has an essential influence on a state of health. Taking into account the urgency of this problem, an analysis of illumination indices and EM radiation was made in audiences of higher educational institutions of various profiles (Ufa, the Republic of Bashkortostan). The total number of illumination measurements was 3528. The measurement methods met the requirements of the interstate standard. According to the results of the illumination indices estimation in the studied universities, a significant deviation from the regulated norms was revealed: in 71.5% of the measurements the index was below the norm. It should be noted that indices differed significantly depending on the type of educational organization. The best situation is in the “Financial University under the Government of the Russian Federation,” where only 13.3% of the measurements are inconsistent with the normative indices. Pulsation coefficient also was determined. It turned out that 88.8% of the measurements do not correspond to the norm. The analysis of illumination measurements in computer classes was carried out. Only one-fifth of them in the computer table working area in the of the document placement corresponded to SanPin. An anonymous questionnaire was also organized for students from four leading universities in Ufa, the Republic of Bashkortostan. According to respondents’ answers, out of seven students, one was revealed to be suffering from myopia. On the basis of “Center for Hygiene and Epidemiology in the Republic of Bashkortostan”, a study of non-ionizing radiation from video terminals located in computer classes was made. 1145 measurements were made in 20 buildings of four universities studied. It was found out that the intensity of the electrostatic field did not meet the requirements of SanPiN in 5.7% of the measurements. Hygienic assessment of the environment of educational organizations of various profiles revealed a number of significant deviations from the regulated norms. The obtained results testify to the need to monitor the illumination and EMR indices both from the administration of higher education institutions and from teachers. Based on the results of the study, recommendations were prepared for the management of higher educational institutions in Ufa.

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ASSESSMENT OF THE INFLUENCE OF ABIOTIC FACTORS ON THE ENZYMATIVE ACTIVITY OF THE SOIL

ÈKOBIOTEH ◽

10.31163/2618-964x-2021-4-2-128-134 ◽

2021 ◽

Vol 4 (2) ◽

pp. 128-134

Author(s):

E.V. Tovstik ◽

◽

A.S. Olkova ◽

Keyword(s):

Enzymatic Activity ◽

Soil Solution ◽

Ph Value ◽

Abiotic Factors ◽

Inverse Correlation ◽

Invertase Activity ◽

Soil Environment ◽

Factors Affecting ◽

Activity Of Enzymes ◽

Made In

Аn attempt is made in this work to establish correlations between the level of enzymatic activity of the soil and factors of an abiotic nature. It was found that the activity of invertase and urease in the soils of more southern territories is higher than that of northern ones. In soils with a pH value of the soil environment close to neutral reaction, the level of enzymatic activity is higher than in more acidic ones. The most sensitive to soil acidity among the studied urease enzymes. In relation to zinc, an inverse correlation was established between its content in the soil and the level of invertase activity. According to the degree of resistance to salinity, the enzymes are arranged in the following order: catalase> invertase> urease. An increase in the mineralization of the soil solution leads to an increase in the activity of urease. Of the studied enzymes, the most labile are representatives of the class of hydrolases (invertase and urease), less labile are oxidoreductases (catalase). Thus, when diagnosing the state of the soil by the level of enzymatic activity, it is necessary to take into account the main abiotic factors affecting the activity of enzymes: the average annual air temperature; pH and mineralization of the soil solution; the content of substances that inhibit microorganisms and block exozymes.

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Incidental capture of elasmobranchs in the bottom-set gill-net fishery off the south coast of Ireland

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400090081 ◽

1994 ◽

Vol 74 (4) ◽

pp. 837-847 ◽

Cited By ~ 11

Author(s):

S.D. Berrow

Keyword(s):

Fishing Effort ◽

South Coast ◽

Fishing Gear ◽

The South ◽

Blue Shark ◽

Incidental Capture ◽

Gill Net ◽

Total Capture ◽

Catch Rates ◽

Basking Shark

The incidental capture of sharks in the bottom-set gill-net fishery off the south coast of Ireland was quantified by placing observers on commercial gill-netters for the duration of a fishing trip. Forty fishing trips were sampled resulting in 1,167 km and 19,760 km h of observed fishing effort. Sixty individual sharks of seven species were reported entangled in the fishing gear. Tope, porbeagle and six-gilled sharks were the most frequently caught species, with black-mouthed dogfish, blue shark, basking shark and starry smooth hound also recorded. Total fishing effort along the south coast was calculated and total capture extrapolated from observed catch rates. An estimated 6,000 sharks were caught in this fishery during the study period.

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1225 Sexsomnia: A Case of Sleep Masturbation And Sleeping In An Open Work Environment

SLEEP ◽

10.1093/sleep/zsaa056.1219 ◽

2020 ◽

Vol 43 (Supplement_1) ◽

pp. A468-A468

Author(s):

David S Kim ◽

Brian E Foster ◽

Meagan M Rizzo ◽

Jacob F Collen ◽

Rodolfo Soca

Keyword(s):

Code Of Conduct ◽

Significant Past Medical History ◽

Factors Affecting ◽

Obstructive Sleep ◽

History Of ◽

Sleep Environment ◽

Sleep Sex ◽

The Military ◽

Made In

Abstract Introduction Sleep sex or sexsomnia is classified in the International Classification of Sleep Disorders as a non-rapid eye movement (NREM) parasomnia. The overall prevalence is unknown but several conditions such as obstructive sleep apnea (OSA), shift work, and/or insufficient sleep have been reported as factors affecting the frequency of NREM parasomnias. Parasomnias, with sexsomnias in particular, can cause significant emotional distress to patients and their families. We present a case of co-morbid sexsomnia and OSA in a patient serving in the military that had the complicating factor of sleeping in open quarters. Report of Case A 40-year-old male in active duty military without significant past medical history or medication use presented to clinic with a two year history of disruptive sleep masturbation reported by wife. Patient’s wife reported no instances of attempted sexual intercourse. The patient had no recollection of the episodes. The frequency and nature of the episodes were causing personal and marital distress. Patient was also concerned about work responsibilities, since he was periodically required to sleep in open environments. After initial clinic evaluation, patient underwent a video polysomnography (vPSG) with an extended EEG montage. No parasomnia activity was captured on vPSG but patient was diagnosed with moderate OSA. He was started on continuous positive airway pressure (CPAP) therapy, resulting in decreased number of episodes with relapses corresponding to nights without CPAP usage. Conclusion Sexsomnia cases require careful history taking and evaluation. The nature of the episodes and the sleep environment of the patient must be examined for any medico-legal ramification as there are court precedents of sexual assault charges made in sexsomnia-related cases. The military environment is unique with group-sleeping conditions, often in austere environments. If sexsomnia were to be misinterpreted as indecent exposure, under the military code of conduct, this could have significant career implications.

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Investment apportionments among participants of PPP rental retirement villages

Built Environment Project and Asset Management ◽

10.1108/bepam-02-2019-0018 ◽

2019 ◽

Vol 10 (1) ◽

pp. 64-77

Author(s):

Shijing Liu ◽

Hongyu Jin ◽

Chunlu Liu ◽

Benzheng Xie ◽

Anthony Mills

Keyword(s):

Pension Funds ◽

Return Rate ◽

Key Factors ◽

Content Type ◽

Factors Affecting ◽

Investment Allocation ◽

Research Findings ◽

The Government ◽

Mean Variance

Purpose The purpose of this paper is to examine public–private partnership (PPP) approaches for the construction of rental retirement villages in Australia and to allocate the investment proportions under a certain project return rate among three investors which are the government, private sectors and pension funds. The apportionment will achieve a minimum overall investment risk for the project. Design/methodology/approach Capital structure, particularly determination of investment apportionment proportions, is one of the key factors affecting the success of PPP rental retirement villages. Markowitz mean-variance model was applied to examine the investment allocations with minimum project investment risks under a certain projected return rate among the PPP partners for the construction of rental retirement villages. Findings The research findings validate the feasibility of the inclusion of pension funds in the construction of PPP rental retirement villages and demonstrate the existence of relationships between the project return rate and the investment allocation proportions. Originality/value This paper provides a quantitative approach for determination of the investment proportions among PPP partners to enrich the theory of PPP in relation to the construction of rental retirement villages. This has implications for PPP partners and can help these stakeholders make vital contributions in developing intellectual wealth in the PPP investment area while providing them with a detailed guide to decision making and negotiation in relation to investment in PPP rental retirement villages.

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