scholarly journals Seasonal variation of parasitism in pejerrey Odontesthes bonariensis (Atheriniformes, Atherinopsidae) from La Viña reservoir (Córdoba, Argentina)

2008 ◽  
Vol 17 (1) ◽  
pp. 28-32 ◽  
Author(s):  
Miguel Mancini ◽  
Cesar Bucco ◽  
Victor Salinas ◽  
Alejandro Larriestra ◽  
Ruben Tanzola ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Freshwater Fish ◽  
Body Condition ◽  
Central Region ◽  
Relative Weight ◽  
Parasite Burden ◽  
Parasite Infection ◽  
Seasonal Differences ◽  
Odontesthes Bonariensis ◽  
Lernaea Cyprinacea

The pejerrey Odontesthes bonariensis is the most important freshwater fish of Argentina central region. The present study was conducted to describe the seasonal variation of parasitism in O. bonariensis from La Viña reservoir (31º 17'S, 65º 01'W), located in the province of Córdoba, Argentina. Between years 1999 and 2002, 573 fishes were caught, and their parasite infection and relative weight (Wr) were assesed. Three parasites were found, Lernaea cyprinacea (Crustacea), Contracaecum spp. larvae (Nematoda) and Cangatiella macdonaghi (Cestoda). Overall, Contracaecum spp. prevalence and intensity were very low. Lernaea cyprinacea and Cangatiella macdonaghi prevalences increased during summer and spring (P < 0.01), respectively. Lernaea cyprinacea infection showed also seasonal differences in intensity (P < 0.05), as well as C. macdonaghi regarding parasites density (P < 0.01). Cangatiella macdonaghi average parasites density was 32.0 (±22.5) cestodes per cm³ of digestive content. No association between parasitism and fish relative weight was found. Besides the seasonality variations observed, the parasite burden found did not compromise fish body condition.

scholarly journals Seasonal Variation in the Parasite Burden and Body Condition of Working Donkeys in East Shewa and West Shewa Regions of Ethiopia

2005 ◽  
Vol 37 (S1) ◽  
pp. 35-45 ◽  
Author(s):  
S. Yoseph ◽  
D. G. Smith ◽  
A. Mengistu ◽  
F. Teklu ◽  
T. Firew ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Body Condition ◽  
Parasite Burden

Volatile fraction and sensory characteristics of Manchego cheese. 2. Seasonal variation

2002 ◽  
Vol 69 (4) ◽  
pp. 595-604 ◽  
Author(s):  
ESTRELLA FERNÁNDEZ-GARCÍA ◽  
CARMEN SERRANO ◽  
MANUEL NUÑEZ
Keyword(s):  
Seasonal Variation ◽  
Raw Milk ◽  
Ethyl Esters ◽  
Volatile Fraction ◽  
Secondary Alcohols ◽  
Methyl Ketones ◽  
Seasonal Differences ◽  
Manchego Cheese ◽  
Branched Chain ◽  
Autumn And Winter

An automatic purge and trap apparatus, coupled to a GC-MS was used to study the seasonal variability of the volatile fraction of raw milk Manchego cheese. Both season and dairy significantly affected abundance of most volatile compounds. Most aldehydes, methyl ketones, n-alcohols, and secondary alcohols reached significantly higher concentrations in spring cheeses. Branched chain alcohols showed significantly higher concentrations in autumn and winter cheeses, while significantly higher amounts of diketones were found in summer cheeses. Most ethyl esters reached higher concentrations in spring and winter cheeses and lower in autumn cheeses. Lower concentrations of α-pinene were found in spring cheeses, and higher amounts of limonene were observed in winter cheeses. Heptane and octane were significantly more abundant in summer cheeses. No significant seasonal differences were found either for quality or intensity scores.

Geographical and seasonal differences in lipid composition and relative weight of by-products from gadiform species

2006 ◽  
Vol 19 (6-7) ◽  
pp. 727-736 ◽  
Author(s):  
E. Falch ◽  
T. Rustad ◽  
R. Jonsdottir ◽  
N.B. Shaw ◽  
J. Dumay ◽  
...  
Keyword(s):  
Lipid Composition ◽  
Relative Weight ◽  
Seasonal Differences ◽  
By Products

Seasonal variation in suicide rates by cause and sex

1986 ◽  
Vol 18 (4) ◽  
pp. 471-478 ◽  
Author(s):  
S. Araki ◽  
H. Aono ◽  
K. Murata ◽  
I. Shikata ◽  
Y. Mitsukuni
Keyword(s):  
Sex Differences ◽  
Seasonal Variation ◽  
Psychosocial Factors ◽  
Seasonal Variations ◽  
Profile Analysis ◽  
Age Difference ◽  
Seasonal Differences ◽  
Suicide Rates ◽  
Car Exhaust ◽  
Males And Females

SummarySeasonal variations in cause- and age-specific suicide rates in males and females were analysed in Osaka, Japan, for the years 1974–83, using profile analysis. Significant cause differences were found in males: (1) the rate for poisoning by domestic, car-exhaust or other gases was high in winter and spring and low in summer and autumn; (2) the rate for hanging, strangulation and suffocation was low in winter; (3) the rate for a variety of violent methods (chemicals, firearms, drowning, etc.) was high in summer. Similarly, there were sex differences in the variation for causes (2) and (3) and for ages 40–54. No significant age difference was found in either sex. Seasonal differences in the ease of suicidal methods and sex- and season-specific psychosocial factors were thought to be the major determinant of the seasonal variation.

Seasonal Variation of Body Condition and Organochlorines in Wild Ducks from California and Mexico

1987 ◽  
Vol 51 (1) ◽  
pp. 132 ◽  
Author(s):  
Miguel A. Mora ◽  
Daniel W. Anderson ◽  
Michael E. Mount
Keyword(s):  
Seasonal Variation ◽  
Body Condition

scholarly journals Seasonal variation of cesium 134 and cesium 137 in semidomestic reindeer in Norway after the Chernobyl accident

Rangifer ◽  
1990 ◽  
Vol 10 (3) ◽  
pp. 35 ◽  
Author(s):  
I.M. H. Eikelmann ◽  
K. Bye ◽  
H. D. Sletten
Keyword(s):  
Seasonal Variation ◽  
Chernobyl Accident ◽  
Whole Body ◽  
Seasonal Differences ◽  
Reindeer Husbandry ◽  
Decrease Rate ◽  
Cesium 137 ◽  
The Mean

The Chernobyl accident had a great impact on the semidomestic reindeer husbandry in central Norway. Seasonal differences in habitat and diet resulted in large variations in observed radiocesium concentrations in reindeer after the Chernobyl accident. In three areas with high values of cesium-134 and cesium-137 in lichens, the main feed for reindeer in winter, reindeer were sampled every second month to monitor the seasonal variation and the decrease rate of the radioactivity. The results are based on measurements of cesium-134 and cesium-137 content in meat and blood and by whole-body monitoring of live animals. In 1987 the increase of radiocesium content in reindeer in V&aring;g&aring; were 4x from August to January. The mean reductions in radiocesium content from the winter 1986/87 to the winter 1987/88 were 32%, 50% and 43% in the areas of V&aring;g&aring;, &Oslash;stre-Namdal and Lom respectively.

scholarly journals Variasi Morfologi Holdfast Lernaea Yang Menyerang Ikan Gurami Di Jawa Timur [Morphological Variation Of Lernaea Holdfast Infest Gouramy In East Java]

2019 ◽  
Vol 6 (1) ◽  
pp. 67
Author(s):  
Kismiyati, Putri Desi Wulan Sari
Keyword(s):  
Freshwater Fish ◽  
Morphological Variation ◽  
Parasitic Diseases ◽  
Lernaea Cyprinacea ◽  
Attachment Organ

Abstract Lernaeosis is one of the parasitic diseases in freshwater fish caused by Lernaea cyprinacea. These parasites infest many freshwater fish. Identification of parasites carried by observing the morphology of holdfast as an attachment organ. This study aims to make observations on the variation of morphology of Lernaea holdfast's in East Java and the identification of Lernaea infest gouramy in East Java.

scholarly journals Factors affecting the sucrose content of sugarcane: iii, varieties

1969 ◽  
Vol 37 (1) ◽  
pp. 28-34
Author(s):  
M. A. Lugo-López ◽  
G. Samuels ◽  
F. Méndez
Keyword(s):  
Puerto Rico ◽  
Seasonal Variation ◽  
Field Experiments ◽  
Total Sugar ◽  
Sucrose Content ◽  
Climatic Region ◽  
Land Area ◽  
Seasonal Differences ◽  
Factors Affecting ◽  
Climatic Regions

Data were obtained from 41 field experiments located throughout the Island. From the whole group of varieties tested, 20 were selected for evaluation of their sucrose production at harvesttime. The data were grouped according to three broad climatic areas, namely, humid, subhumid, and semiarid. Certain varieties were observed to produce better sucrose yields in a given climatic region, but in general, there were no significant differences among climatic regions for most varieties. P.R.'s 908, 907, 902, and 905, M.'s 330 and 28, and C.A.'s 38-102 and 38-74 produced the highest sucrose yields at harvesttime. The superiority in this respect of M.'s 336 and 28, and P.R.'s 907, 902, and 905 has been definitely established. Other promising varieties need further testing. Most of these canes yield more total sugar than the standard commercial P.O.J. 2878 and B.H. 10-12 canes, which cover more than 80 percent of the total land area where sugarcane is grown in Puerto Rico. The important bearing of seasonal variation on sucrose content of varieties is discussed. Seasonal differences in the performance of individual varieties have proved to be much greater than differences encountered between varieties in the same season.

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