scholarly journals Sản lượng khai thác của nghề lưới kéo ở Kiên Giang năm 2014 - 2015

2019 ◽  
Vol 19 (1) ◽  
pp. 137-145
Author(s):  
Nguyen Van Hai
Keyword(s):  
Yield Components ◽  
Total Yield ◽  
Otter Trawl ◽  
Marine Fisheries ◽  
Yield Structure ◽  
One Year ◽  
Trawl Fisheries ◽  
Research Institute

In periods from July 2014 to June 2015, the Research Institute for Marine Fisheries collected data about yield from catch landing of the trawl fisheries in Kien Giang province. Total yield was calculated by Stamatopoulos Constantine’s method in 2002. The results indicated that the total yield of trawls in Kien Giang province was about 592.5 thousand tons one year. In which, the pair trawl’s yield was 84%, the otter trawl’s yield was 16%. The yield structure was different between pair trawl and otter trawl. Main yield components of pair trawl were trashfish and anchovy groups; and those of otter trawl were trashfish, mixed fish and mixed shrimp.

Yield and Yield Components of Six Sweet Potato (Ipomoea batatas) Cultivars II. Variability and Possible Sources of Variation

1975 ◽  
Vol 11 (1) ◽  
pp. 49-58 ◽  
Author(s):  
S. B. Lowe ◽  
L. A. Wilson
Keyword(s):  
Sweet Potato ◽  
Yield Components ◽  
Ipomoea Batatas ◽  
Total Yield ◽  
Yield Variability ◽  
Tuber Development ◽  
Marketable Yield ◽  
Yield Variation ◽  
Planting Material ◽  
Sources Of Variation

SUMMARYVariabilities in total yield, marketable yield and components of yield (tuber numbers and mean tuber weights) were studied in six sweet potato cultivars over two seasons, in crops harvested at two dates. Yield variability was high, particularly in marketable tubers, and was related to either or both components of yield. High-yielding cultivars had lower variabilities and the commercial cultivar 049 the lowest. The contribution of yield components to variability in total yield was evaluated and sources of yield variation were attributed to planting material, tuber development and season.

New records of Solenocera barunajaya Crosnier, 1994 and Solenocera rathbuni Ramadan, 1938 (Crustacea: Decapoda: Penaeoidea) from the southwest coast of India

Zootaxa ◽  
2017 ◽  
Vol 4341 (2) ◽  
pp. 296
Author(s):  
P. PURUSHOTHAMAN ◽  
REKHA DEVI CHAKRABORTY ◽  
G. MAHESWARUDU ◽  
G. KUBERAN
Keyword(s):  
New Records ◽  
Marine Biodiversity ◽  
Marine Fisheries ◽  
Southwest Coast Of India ◽  
Southwest Coast ◽  
Commercial Importance ◽  
Research Institute

The genus Solenocera Lucas, 1849 consist of 43 species, most with commercial importance and occurring in offshore, deeper waters (Pérez Farfante & Kensley 1997; De Grave & Fransen 2011). Twelve species in the genus Solenocera were reported from India, with a few contributing to the regular fishery (S. crassicornis, S. choprai, and S. hextii), and others seldom captured (S.alfonso, S.alticarinata, S.annectens, S.halli, S.koelbeli, S.melantho, S.pectinata, S.pectinulata and S.waltairensis). Members of the Solenoceridae are identified based on the key taxonomic characters of the genitalia and the cephalothorax. Major taxonomic references on solenocerids include Crosnier (1978, 1989), Perez Farfante (1977), and Dall (1999). Specimens are deposited in the Marine Biodiversity Museum at the Central Marine Fisheries Research Institute, Kerala (CMFRI). 

Effect of Damage by Stalk-Eyed Fly (Diopsis Thoracica) on Yield Components of Rice

1984 ◽  
Vol 20 (3) ◽  
pp. 225-233 ◽  
Author(s):  
A. M. Alghali ◽  
E. O. Osisanya
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Total Yield ◽  
Grain Weight ◽  
Rice Varieties ◽  
Pest Damage ◽  
Diopsis Thoracica ◽  
Photoperiod Sensitive

SUMMARYRice varieties were compared for their response to infestation by the stalk-eyed fly, Diopsis thoracica (West), both when a choice of varieties was available to the pest and when there was no choice. The fly significantly decreased the number of panicles produced (both total and mature), the percentage of tillers with panicles, grain weight and total yield of unprotected plants, and increased the number of immature panicles and time to 50% flowering. Reductions in grain yield of between 2 and 97% were recorded but these losses were unrelated to the percentage of damaged tillers. Production of new tillers did not fully compensate for damaged ones in most varieties. However, photoperiod-sensitive rice varieties were better able to compen- sate for pest damage than most.

Otter-Trawl Fisheries of South Africa

1949 ◽  
Vol 39 (4) ◽  
pp. 529 ◽  
Author(s):  
Peter Scott
Keyword(s):  
South Africa ◽  
Otter Trawl ◽  
Trawl Fisheries

scholarly journals 214 Yield and Quality Response of Carrot (Daucus carota L.) to Simulated Storm Damage

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 479A-479
Author(s):  
Michael E. Bartolo ◽  
Frank C. Schweissing
Keyword(s):  
Daucus Carota ◽  
Yield Components ◽  
Total Yield ◽  
Growing Season ◽  
Storm Damage ◽  
Lower Yield ◽  
Marketable Yield ◽  
Daucus Carota L ◽  
Yield And Quality ◽  
Quality Response

Parts of Colorado receive more hail than almost any other area in the nation. Severe storms can injure crop tissue and, thus, lower yield and predispose the crop to disease infection. Our study was conducted to determine the yield and quality response of carrot (Daucus carota L.) to simulated storm damage during different periods of plant development. We removed 33% and 67% of the carrot foliage at four dates, spaced 10 days apart, during the middle of the growing season. In 1997 and 1998, 67% defoliation significantly reduced total and marketable yields more than did 33% defoliation. Total yield components, length and diameter, were similarly affected. Defoliation, in general, decreased yield the greatest when it when it occurred at the later stages of development. Carrot foliage continued to develop and grow after all defoliation events. Nonetheless, moderate (33%) and severe (67%) foliage loss reduced marketable yield and yield components of carrots.

Herbage, grain and animal production from winter-grazed cereal crops

1983 ◽  
Vol 23 (121) ◽  
pp. 154 ◽  
Author(s):  
PR Dann ◽  
A Axelsen ◽  
BS Dear ◽  
ER Williams ◽  
CBH Edwards
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Animal Production ◽  
Cereal Crops ◽  
Grain Production ◽  
Sheep Grazing ◽  
Winter Cereal ◽  
Relative Prices ◽  
Grain Yield Components ◽  
One Year

In four experiments from 1975 to 1979, wheat or oat crops were grazed to a standard height of about 6 cm (and to 2 cm as well in 1975 and 1976) at various times during winter by sheep, and by cattle also in 1979. Nitrogen was applied to a portion of each plot at the end of grazing. The crops were then allowed to recover for grain production. Herbage and grain yields, grain yield components, grazing days and liveweight gain were recorded. In two years, grazing significantly depressed grain yield relative to that of the ungrazed control, by 25-79% depending on treatment. In all years more herbage and animal production were obtained from a July or August grazing than from a June grazing. The greatest number of sheep grazing days recorded was 3414/ha for hoggets grazing oats for August 1977. lsis wheat was generally inferior to oats for grazing and grain production. Nitrogen increased grain and hay yields in three years; this increase was not profitable for grain, but was profitable for hay in at least one year. The most profitable use of winter cereal crops depends strongly on the relative prices of meat, grain, and hay. Our data suggest relationships between animal, hay, and grain production, which may be useful for farmers wishing to decide probable best options for using grazing-grain crops.

scholarly journals Spanish otter trawl fisheries in the Cantabrian Sea

2010 ◽  
Vol 67 (8) ◽  
pp. 1604-1616 ◽  
Author(s):  
Antonio Punzón ◽  
Carmen Hernández ◽  
Esther Abad ◽  
José Castro ◽  
Nelida Pérez ◽  
...  
Keyword(s):  
Hierarchical Classification ◽  
Horse Mackerel ◽  
Otter Trawl ◽  
Target Species ◽  
The West ◽  
Market Conditions ◽  
Blue Whiting ◽  
Classification Technique ◽  
Main Target ◽  
Trawl Fisheries

Abstract Punzón, A., Hernández, C., Abad, E., Castro, J., Pérez, N., and Trujillo, V. 2010. Spanish otter trawl fisheries in the Cantabrian Sea. – ICES Journal of Marine Science 67: 1604–1616 A non-hierarchical classification technique (clustering large applications, CLARA) was used to identify four fishing tactics of Spanish otter trawlers in the Cantabrian Sea (ICES Division VIIIc) from 1983 to 2004: mixed fishing, blue whiting fishing, horse mackerel fishing, and mackerel fishing. There were no significant differences in the fishing tactics employed by two trawl fleets identified using a non-hierarchical classification technique (partition around medoids). There was, however, a decline in the use of the blue whiting fishing tactic from 2000 on, perhaps as a result of competition with pairtrawls, a gear whose main target species is blue whiting. There was an increase in the number of trips using the mackerel fishing tactic from 1996, a change possibly caused by improved market conditions. Between 2000 and 2004, the fleets had two distinct behaviour patterns, identified depending on the area in which they operated. The study area could therefore be subdivided into two areas based on the prevalence of the fishing tactic followed. The horse mackerel fishing tactic was more commonly used in the west, and the mixed fishing tactic in the east.

scholarly journals Effect of GA3 and row ratio of restorer (R) and CMS lines (A) on different characters and seed production of BRRI Hybrid Dhan2

2013 ◽  
Vol 37 (4) ◽  
pp. 665-676 ◽  
Author(s):  
MH Rahman ◽  
MM Khatun ◽  
MSR Khan ◽  
MAK Mian ◽  
MG Rasul
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Yield Components ◽  
Outcrossing Rate ◽  
Grain Weight ◽  
Growth And Yield ◽  
Four Levels ◽  
1000 Grain Weight ◽  
Different Doses ◽  
Research Institute

An experiment was conducted at the experimental farm of Bangladesh Rice Research Institute (BRRI), Gazipur, during November to May 2009-10 to study the effect of GA3and row ratio of restorer and CMS lines on different characters and F1 seed production of BRRI hybrid dhan2. The treatments were of four levels of GA3 viz., (i) control, (ii) 150 g/ha, (iii) 250 g/ha, and (iv) 350 g/ha and five row ratios (R:A) viz., (i) 2:8, (ii) 2:10, (iii) 2:12, (iv) 2:14, and (v) 2:16. Different doses of GA3 ignificantly influenced growth and yield components of rice except total tillers/hill and 1000-grain weight. The highest F1 seed yield (2.34 t/ha) of BRRI hybrid dhan2 was obtained with an application of GA3 @ 250 g/ha which enhanced the maximum number of effective tillers, the highest number of grains/panicle, panicle exsertion rate and outcrossing rate. The lowest seed yield (1.10 t/ha) was produced without application of GA3 i.e., control. The row ratio of 2:12 and 2:8 produced the highest (2.05 t/ha) and the lowest (1.63 t/ha) F1seed yield, respectively. The interaction between GA3 and row ratio of restorer and CMS lines was significant for F1 seed yield. The highest F1 seed yield (2.90 t/ha) was obtained with the application of GA3 @ 250 g/ha at the row ratio of 2:12 (R: A). The lowest seed yield (0.95 t/ha) was recorded without application of GA3 (control) at row ratios of 2:16. DOI: http://dx.doi.org/10.3329/bjar.v37i4.14391 Bangladesh J. Agril. Res. 37(4): 665-676, December 2012

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