Aspects of Larval American Lobster (Homarus americanus) Ecology in St. Georges Bay, Nova Scotia

1982 ◽  
Vol 39 (8) ◽  
pp. 1117-1129 ◽  
Author(s):  
Gareth C. Harding ◽  
W. Peter Vass ◽  
Ken F. Drinkwter
Keyword(s):  
Nova Scotia ◽  
Large Scale ◽  
Homarus Americanus ◽  
Small Scale ◽  
Langmuir Circulation ◽  
Survival Estimate ◽  
Larval Production ◽  
Stage 1 ◽  
Surface Drift ◽  
Probability Of Capture

Lobster larvae first appeared in the neuston of St. Georges Bay, N.S., in 1978 on June 22 at a surface temperature of 12.5 °C. Abundances ranged from 0 to 243 × 103 larvae∙km−2 throughout the larval season with a seasonal average of 22.9 ± 37.9 × 103 larvae∙km−2 for the entire bay. Larval production in the bay equals the highest values reported in the literature for individual stations in nearby western Northumberland Strait. We derive the first survival estimate from larval stage 1 to recruits entering the fishery of 0.2–0.4%. On average 81.4, 14.1, and 4.5% of the larvae were caught within the upper 30-cm, 30- to 70-cm, and 70- to 110-cm levels beneath the sea surface, respectively. This daytime distribution of lobster larvae in the upper 110 cm is modified by cloud cover. The adult distribution in the bay and wind-driven surface drift are believed to be the two main causes of the observed large-scale horizontal patchiness. Lobster larvae have a significantly high probability of capture by our nets if patches of floating seaweed are encountered. A hypothesis is proposed that the observed small-scale patchiness of both larvae and weed is caused by Langmuir circulation.Key words: lobster larvae, Homarus americanus, ecology, Langmuir circulation, recruitment, survival, Nova Scotia

Large-scale Analysis of Atlantic Nova Scotia American Lobster (Homarus americanus) Landings with Respect to Habitat, Temperature, and Wind Conditions

1994 ◽  
Vol 51 (6) ◽  
pp. 1308-1321 ◽  
Author(s):  
Christiane Hudon
Keyword(s):  
Nova Scotia ◽  
Large Scale ◽  
Coastal Upwelling ◽  
Thermal Characteristics ◽  
Homarus Americanus ◽  
American Lobster ◽  
Cumulative Number ◽  
Northern Cape ◽  
Definition Of ◽  
Homogeneous Regions

American lobster (Homarus americanus) landings per unit of habitat, calculated for 25 statistical districts (SD) of Atlantic Nova Scotia (N.S.), were consistently higher in northern Cape Breton (SD 1–7) and southwestern N.S. (SD 32–34) than from the eastern (SD 15–18) and southern (SD 22–31) shores. Analyses suggest that changes in lobster populations of Atlantic N.S. take place over distances in the order of 100 km and over periods of about 5 yr and that lobster abundance is not limited by habitat availability. Five large homogeneous regions subject to similar historical landing trends could be identified on the basis of their thermal characteristics. Regions of lowest lobster landings (SD 8–31) are oriented in the axis of dominant southwest winds, which generate coastal upwelling, resulting in the lowest cumulative number of degree-days and a high year-to-year variability. Conversely, the high landings recorded in southwestern N.S. can be related to warm and stable temperature conditions, allowing lobsters to enhance yearly thermal gains via winter migrations into deep (> 100 m), warm Slope water. The definition of homogeneous regions characterized by common historical landing trends and thermal regime suggests that lobster abundance in Atlantic N.S. is ultimately controlled by large-scale oceanographic processes.

scholarly journals MODEL LATIHAN KETERAMPILAN GERAK PENCAK SILAT ANAK USIA 9-12 TAHUN

2013 ◽  
Vol 1 (1) ◽  
pp. 26-36
Author(s):  
Bayu Iswana ◽  
Siswantoyo Siswantoyo
Keyword(s):  
Large Scale ◽  
Training Model ◽  
Small Scale ◽  
Training Models ◽  
Movement Skills ◽  
Qualitative Descriptive ◽  
Model Training ◽  
Result Analysis ◽  
Stage 1 ◽  
Yogyakarta City

Penelitian ini bertujuan untuk menghasilkan model latihan keterampilan gerak pencak silat anak usia 9-12 tahun. Penelitian pengembangan mengadaptasi langkah-langkah penelitian pengembangan dari Borg & Gall (1983, p.775), (1) pengumpulan informasi, (2) analisis hasil informasi, (3) pengembangan produk awal, (4) validasi ahli dan revisi tahap 1, (5) ujicoba skala kecil dan revisi, (6) ujicoba skala besar dan revisi tahap 2, (7) produk final. Uji coba skala kecil dilakukan terhadap anak Tapak Suci SD N 1 Padokan dan Tapak Suci SD Muhamadiyah Demangan. Uji coba skala besar dilakukan terhadap anak Pagar Nusa Sleman, Pagar Nusa Kota Yogyakarta yang berlatih di SD N Demangan, Persatuan Hati Bantul. Instrumen pengumpulan data, (1) wawancara, (2) skala nilai, (3) pedoman observasi model, (4) pedoman keefektifan model. Teknik analisis data yang digunakan yaitu analisis deskriptif kuantitatif dan diskriptif kualitatif. Isi dari hasil produk di dalamnya terdapat 6 model latihan, (1) kucing dan tikus, (2) bentengan, (3) gobak sodor, (4) jala ikan, (5) berburu burung, (7) elang dan anak ayam. Para ahli menyimpulkan bahwa di dalam model terdapat aspek kognitif, afektif dan psikomotor, sehingga model layak dan efektif untuk digunakan.  A TRAINING MODEL FOR PENCAK SILAT MOVEMENT SKILLS OF CHILDREN AGED 9-12 YEARSAbstract This study aims to produce a training model for pencak silat (self-defence) movement skills of children aged 9-12 years. This research and development (R & D) study was conducted by adapting the R & D steps by Borg & Gall (1983, p.775), i.e. (1) information collection, (2) information result analysis, (3) preliminary product development, (4) expert validation and stage 1 revision, (5) a small-scale tryout and a revision, (6) a large-scale tryout and stage 2 revision, and (7) final product. The small-scale tryout was conducted by involving participants of Tapak Suci SD N I Padokan and Tapak Suci SD Muhamadiyah Demangan. The large-scale tryout was conducted by involving participants of Pagar Nusa Sleman and Pagar Nusa Yogyakarta City carrying out training in SD N Demangan and Persatuan Hati Bantul. The data collecting instruments included (1) interviews, (2) a score scale, (3) a model observation guide, and (4) a model effectiveness guide. The data were anlyzed using the quantitative and qualitative descriptive techniques. The contents of the product consist of six training models, i.e. (1) kucing dan tikus, (2) bentengan, (3) gobak sodor, (4) jala ikan, (5) berburu burung  and (6) elang dan anak ayam. The experts conclude that in the model there are cognitive, affective, and psychomotor aspects so that it is appropriate and effective to use. Keywords: model, training, pencak silat, children aged 9 – 12 years

Completing the circle: stock-recruitment relationships and Acanthaster

1992 ◽  
Vol 43 (3) ◽  
pp. 653 ◽  
Author(s):  
H McCallum
Keyword(s):  
Large Scale ◽  
Reproductive Potential ◽  
Critical Factor ◽  
Small Scale ◽  
Searching Behaviour ◽  
Stock Size ◽  
Alternative Hypotheses ◽  
Stock Recruitment ◽  
Larval Production ◽  
The Relationship

In the absence of any reliable data, two opposing null hypotheses concerning the relationship between Acanthaster stock size and the level of recruitment tend to be assumed. First, recruitment may be assumed to be independent of stock size. This is appropriate if stocks are considered on a small scale, with most recruitment occurring externally. Second, recruitment may be assumed to be linearly related to stock size. This is appropriate if stock is considered on a large scale, so that larval production occurs from within the stock. If the potential of predators to prevent outbreaks is investigated, these two alternative hypotheses lead to diametrically opposed conclusions as to the importance of the two main parts of the predator functional response. If recruitment is independent of stock size, then the maximum prey-consumption rate of predators per unit of time is the critical factor, whereas if recruitment is linearly related to stock, then it is the searching behaviour of predators when starfish are rare that determines whether outbreaks occur. The extent of internal and external contributions to recruitment may also have profound results for the overall behaviour of Acanthaster populations, irrespective of predation. If a humped stock-recruitment relationship is assumed, together with a very high reproductive potential, then very small changes in the amount of larval interchange between reefs can transform dynamics from regular cycles to chaos and back to cycles. This means that the qualitative behaviour of starfish populations may be greatly affected by very minor variations in the amount of larval interchange between reefs.

Small-Scale Science to Large-Scale Profession

2000 ◽  
Vol 45 (4) ◽  
pp. 396-398
Author(s):  
Roger Smith
Keyword(s):  
Large Scale ◽  
Small Scale

Development of Physics Learning Module Based on Guided Inquiry with Light Wave Material in Class XI of Senior High School

2020 ◽  
Vol 1 (1) ◽  
pp. 1-10
Author(s):  
Evi Rahmawati ◽  
Irnin Agustina Dwi Astuti ◽  
N Nurhayati
Keyword(s):  
Large Scale ◽  
Learning Strategy ◽  
Student Response ◽  
Average Score ◽  
Small Scale ◽  
Design Development ◽  
Teacher Response ◽  
Student Responses ◽  
Analysis Design ◽  
Scientific Skills

IPA Integrated is a place for students to study themselves and the surrounding environment applied in daily life. Integrated IPA Learning provides a direct experience to students through the use and development of scientific skills and attitudes. The importance of integrated IPA requires to pack learning well, integrated IPA integration with the preparation of modules combined with learning strategy can maximize the learning process in school. In SMP 209 Jakarta, the value of the integrated IPA is obtained from 34 students there are 10 students completed and 24 students are not complete because they get the value below the KKM of 68. This research is a development study with the development model of ADDIE (Analysis, Design, Development, Implementation, and Evaluation). The use of KPS-based integrated IPA modules (Science Process sSkills) on the theme of rainbow phenomenon obtained by media expert validation results with an average score of 84.38%, average material expert 82.18%, average linguist 75.37%. So the average of all aspects obtained by 80.55% is worth using and tested to students. The results of the teacher response obtained 88.69% value with excellent criteria. Student responses on a small scale acquired an average score of 85.19% with highly agreed criteria and on the large-scale student response gained a yield of 86.44% with very agreed criteria. So the module can be concluded receiving a good response by the teacher and students.

Planetary gentrification and urban (re)development

2019 ◽  
Vol 61 (1) ◽  
pp. 5-13 ◽  
Author(s):  
Loretta Lees
Keyword(s):  
Low Income ◽  
Policy Making ◽  
Large Scale ◽  
Urban Redevelopment ◽  
Urban Transformation ◽  
Small Scale ◽  
Income Groups ◽  
Low Income Groups

Abstract Gentrification is no-longer, if it ever was, a small scale process of urban transformation. Gentrification globally is more often practised as large scale urban redevelopment. It is state-led or state-induced. The results are clear – the displacement and disenfranchisement of low income groups in favour of wealthier in-movers. So, why has gentrification come to dominate policy making worldwide and what can be done about it?

AGRICULTURAL PRODUCTION OF CA DONG PEOPLE IN RESETTLEMENT AREA OF TRANH RIVER HYDROPOWER NUMBER 2: CURRENT SITUATION AND IMPACT FACTORS

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Bùi Thị Bích Lan
Keyword(s):  
Social Relations ◽  
Agricultural Production ◽  
Large Scale ◽  
Transition Process ◽  
Impact Factors ◽  
Small Scale ◽  
Scale Production ◽  
Technical Application ◽  
Production Models ◽  
Role Of The State

In Vietnam, the construction of hydropower projects has contributed significantly in the cause of industrialization and modernization of the country. The place where hydropower projects are built is mostly inhabited by ethnic minorities - communities that rely primarily on land, a very important source of livelihood security. In the context of the lack of common productive land in resettlement areas, the orientation for agricultural production is to promote indigenous knowledge combined with increasing scientific and technical application; shifting from small-scale production practices to large-scale commodity production. However, the research results of this article show that many obstacles in the transition process are being posed such as limitations on natural resources, traditional production thinking or the suitability and effectiveness of scientific - technical application models. When agricultural production does not ensure food security, a number of implications for people’s lives are increasingly evident, such as poverty, preserving cultural identity, social relations and resource protection. Since then, it has set the role of the State in researching and building appropriate agricultural production models to exploit local strengths and ensure sustainability.

Managing the impacts of mining on Ghana’s water resources from a legal perspective

2018 ◽  
Vol 1 (3) ◽  
pp. 156-165 ◽  
Author(s):  
Nasirudeen Abdul Fatawu
Keyword(s):  
Surface Water ◽  
Water Resources ◽  
Environmental Protection Agency ◽  
Large Scale ◽  
Small Scale ◽  
Mining Activities ◽  
Protection Agency ◽  
Environmental Laws ◽  
Mining Areas ◽  
Legal Perspective

Recent floods in Ghana are largely blamed on mining activities. Not only are lives lost through these floods, farms andproperties are destroyed as a result. Water resources are diverted, polluted and impounded upon by both large-scale minersand small-scale miners. Although these activities are largely blamed on behavioural attitudes that need to be changed, thereare legal dimensions that should be addressed as well. Coincidentally, a great proportion of the water resources of Ghana arewithin these mining areas thus the continual pollution of these surface water sources is a serious threat to the environmentand the development of the country as a whole. The environmental laws need to be oriented properly with adequate sanctionsto tackle the impacts mining has on water resources. The Environmental Impact Assessment (EIA) procedure needs to bestreamlined and undertaken by the Environmental Protection Agency (EPA) and not the company itself.

RANCANG BANGUN PERANGKAT EKSPERIMENTASI PROSES PIROLISIS BIOMASA GELOMBANG MIKRO

2013 ◽  
Vol 14 (2) ◽  
Author(s):  
Noor Fachrizal
Keyword(s):  
Large Scale ◽  
Continuous Model ◽  
Biomass Energy ◽  
Scale Model ◽  
Small Scale ◽  
Laboratory Apparatus ◽  
Liquid Form ◽  
Large Scale Model ◽  
Bio Oil ◽  
Pyrolysis Of Biomass

Biomass such as agriculture waste and urban waste are enormous potency as energy resources instead of enviromental problem. organic waste can be converted into energy in the form of liquid fuel, solid, and syngas by using of pyrolysis technique. Pyrolysis process can yield higher liquid form when the process can be drifted into fast and flash response. It can be solved by using microwave heating method. This research is started from developing an experimentation laboratory apparatus of microwave-assisted pyrolysis of biomass energy conversion system, and conducting preliminary experiments for gaining the proof that this method can be established for driving the process properly and safely. Modifying commercial oven into laboratory apparatus has been done, it works safely, and initial experiments have been carried out, process yields bio-oil and charcoal shortly, several parameters are achieved. Some further experiments are still needed for more detail parameters. Theresults may be used to design small-scale continuous model of productionsystem, which then can be developed into large-scale model that applicable for comercial use.

Sign in / Sign up

Export Citation Format

Share Document