Seasonal variation in dawn song characteristics in the common nightingale

2005 ◽  
Vol 70 (6) ◽  
pp. 1265-1271 ◽  
Author(s):  
Hansjoerg P. Kunc ◽  
Valentin Amrhein ◽  
Marc Naguib
Keyword(s):  
Seasonal Variation ◽  
Dawn Song ◽  
The Common

scholarly journals Age and growth of Callionymus lyra L.

1951 ◽  
Vol 30 (2) ◽  
pp. 281-296 ◽  
Author(s):  
Hsiao-Wei Chang
Keyword(s):  
Seasonal Variation ◽  
Sexual Dimorphism ◽  
West Africa ◽  
Economic Importance ◽  
Age And Growth ◽  
Seasonal Abundance ◽  
The Common ◽  
Abundance And Distribution ◽  
Median Fins ◽  
European Seas

The Common Dragonet, Callionymus lyra L., is one of the commonest fishes in the Plymouth area, and is widely distributed in European seas. Recent reports indicate that it occurs also off the coast of West Africa (Fowler, 1936; Poll, 1949). This fish, like others of the genus, attracts attention because, although it has very little economic importance, it is strikingly coloured and the sexes are markedly different. Work has been done on the breeding by Holt (1897, 1898), and by Holt & Scott (1898); on ova and larvae by M'Intosh (1885), M'Intosh & Prince (1889), Cunningham (1891), Holt (1897), Ehrenbaum (1905–9), Fage (1918), Mielck (1925), Duncker, Ehrenbaum, Kyle, Mohr & Schnakenbeck (1929); on seasonal abundance and distribution of post-larvae off Plymouth by Russell (1930–47) and Corbin (1948); and on the skeleton by Günther (1861) and Ford (1937). The mature males are provided with remarkable secondary sexual characters both in coloration and in relative lengths of snout and of median fins, which render them so different from the females that they were originally regarded as different species and known as the Gemmeous Dragonet (male C. lyra L.) and the Sordid Dragonet (female C. lyra L.=C. dracunculus L.) respectively (Donovan, 1808; Yarrell, 1859; Couch, 1863). The sexual dimorphism and seasonal variation of this species has been much studied by Holt (1898), Smitt (1892–95), Gallien (1934), Letaconnoux (1949) and Desbrosses (1949). Very little information has so far been provided about its age and growth, with which the present paper deals.

An Analysis of Factors Determining Seasonal Variation in the Byssal Attachment Strength of Mytilus Edulis

1982 ◽  
Vol 62 (1) ◽  
pp. 147-155 ◽  
Author(s):  
H. A. Price
Keyword(s):  
Seasonal Variation ◽  
Mytilus Edulis ◽  
Northern Hemisphere ◽  
Environmental Variables ◽  
Seasonal Fluctuations ◽  
Sea Temperature ◽  
Scope For Growth ◽  
South Wales ◽  
Attachment Strength ◽  
The Common

INTRODUCTIONThe common mussel Mytilus edulis L. is one of the most successful shore molluscs. It is widely distributed in the northern hemisphere and is abundant not only in the most sheltered bays and loughs but also in conditions of extreme exposure (Lewis, 1964; Seed, 1976). Attachment to the substratum is by means of the proteinaceous byssus complex, the strength of which has been shown to vary seasonally (Price, 1980b). This variation could be a response to seasonal fluctuations in wave action, as suggested by Pieters et al. (1978), or may result from the seasonality of other environmental variables. Some of these, e.g. salinity and sea temperature, have been shown to influence byssus production (Glaus, 1968; Van Winkle, 1970; Allen et al. 1976), Phytoplankton density, spawning and the reduced ‘scope for growth’ during winter months (Bayne & Widdows, 1978) may also play a role in determining byssus strength.In the present study, the relationships between byssal attachment strength and environmental and other variables are examined in a population of mussels on the South Wales coast.

scholarly journals The seasonal variation in the cellulose content of the common Scottish Laminariaceae and Fucaceae

1950 ◽  
Vol 29 (2) ◽  
pp. 379-387 ◽  
Author(s):  
W. A. P. Black
Keyword(s):  
Seasonal Variation ◽  
Cellulose Content ◽  
Laminaria Digitata ◽  
Laminaria Saccharina ◽  
The Common ◽  
June July

Monthly samples of the common British Laminariaceae and Fucaceae taken during 1946 have been analysed for cellulose.The cellulose content has been found to increase with the depth of immersion of the weed.In the Laminariaceae, both in the stipe and frond it undergoes marked seasonal variation, exhibiting two maxima, March/April and September/October with a distinct minimum in June/July.In Laminaria cloustoni, in March, maxima of 5·7 (dry basis) occur in the fronds and 10·3% in the stipes with minima, in June, of 4·1 and 8·4% respectively. In Laminaria saccharina the cellulose content (dry basis) varies between 4–5% in the frond and 7–8% in the stipe and in Laminaria digitata between 3–5% in the frond and 6–8% in the stipe.

scholarly journals The seasonal variation in weight and chemical composition of the common British Laminariaceae

1950 ◽  
Vol 29 (1) ◽  
pp. 45-72 ◽  
Author(s):  
W. A. P. Black
Keyword(s):  
Seasonal Variation ◽  
Chemical Composition ◽  
Seasonal Variations ◽  
Alginic Acid ◽  
Chemical Constitution ◽  
Approximate Composition ◽  
The Common

The seasonal variations in the total ash, crude proteins, mannitol, laminarin and alginic acid contents are given for monthly samples of the Laminariaceae,L. cloustoni, L. digitataandL. saccharinafrom November 1946 to October 1948, samples ofL. digitataandL. saccharinahaving been taken at different localities to determine the effect, if any, of the degree of exposure on the chemical composition.The results agree favourably with those of the first 2 years examined and indicate that, with only a few exceptions, results might be reproducible in the corresponding season of any year, and it should be possible, therefore, to predict the approximate composition in subsequent years.As before, the marked seasonal variations in chemical constitution occur in the fronds, where the bulk, if not all, of the photosynthesis occurs. The stipes undergo some variation parallel to that in the fronds, but within narrower limits, while laminarin is absent throughout the year.

scholarly journals Distribution and Seasonal Variation of Microplastics in Tallo River, Makassar, Eastern Indonesia

Toxics ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 129
Author(s):  
Ega Adhi Wicaksono ◽  
Shinta Werorilangi ◽  
Tamara S. Galloway ◽  
Akbar Tahir
Keyword(s):  
Seasonal Variation ◽  
Sediment Samples ◽  
Eastern Indonesia ◽  
Potential Source ◽  
Water And Sediment ◽  
Main River ◽  
Spatial Trends ◽  
Riverine Environment ◽  
The Common ◽  
Sediment Corer

Attention towards microplastic (MP) pollution in various environments is increasing, but relatively little attention has been given to the freshwater-riverine environment. As the biggest city in the eastern Indonesia region, Makassar can be a potential source of MP pollution to its riverine area. This study aimed to determine the spatial trends, seasonal variation, and characteristics of MPs in the water and sediment of Tallo River, as the main river in Makassar. Water samples were collected using a neuston net and sediment samples were collected using a sediment corer. The samples collected contained MPs with an abundance ranging from 0.74 ± 0.46 to 3.41 ± 0.13 item/m3 and 16.67 ± 20.82 to 150 ± 36.06 item/kg for water and sediment samples, respectively. The microplastic abundance in the Tallo River was higher in the dry season and tended to increase towards the lower river segment. Fragments (47.80–86.03%) and lines (12.50–47.80%) were the predominant shapes, while blue (19.49–46.15%) and transparent (14.29–38.14%) were the most dominant color. Polyethylene and polypropylene were the common MP polymers found in the Tallo river. Actions to prevent MP pollution in the Makassar riverine area are needed before MP pollution becomes more severe in the future.

scholarly journals Seasonal variation of allergy profile of patients visiting a tertiary care hospital in hilly areas of Himachal Pradesh

2018 ◽  
Vol 6 (1) ◽  
pp. 146
Author(s):  
Manpreet S. Nanda ◽  
Rama Devi
Keyword(s):  
Seasonal Variation ◽  
Tertiary Care ◽  
Allergic Diseases ◽  
Nasal Allergy ◽  
Care Hospital ◽  
Prick Test ◽  
Younger Age ◽  
Dust Mite ◽  
Skin Prick Tests ◽  
The Common

Background: Allergic diseases are very common and are caused by allergen whose role varies according to climate changes. Not many studies are available regarding the same in our region. Skin prick test is a diagnostic procedure for allergy testing. The aim of the present study was to find out the seasonal variation of different allergies in our region.Methods: A total of 686 patients with allergic complaints were assessed for age and sex distribution, seasonal variation of number of allergy patients and seasonal variation of patient symptoms. 608 patients who gave consent and were found fit for skin prick tests underwent the tests and were analysed for allergy profile of the patients in different seasons.Results: The majority of patients were females and of younger age group. The majority of the patients had nasal symptoms and these symptoms were more in summer and rainy season during which pine mix and grass pollen were common allergens. Pulmonary symptoms were maximum in winters with dust mite and moulds being the common allergens. Dust mite was overall the most common allergen involved. Sensitization to allergens was less in winter months.Conclusions: This study focussed on seasonal variation of allergies and found pine mix and grass pollens to be major cause of nasal allergy and dust mite and mould mix to mainly cause pulmonary symptoms.

scholarly journals Pityriasis rosea: a clinicoepidemiological study of 115 cases

2018 ◽  
Vol 4 (2) ◽  
pp. 202
Author(s):  
Srirath Madappally Kambil
Keyword(s):  
Seasonal Variation ◽  
Common Type ◽  
Unknown Etiology ◽  
Atypical Presentation ◽  
Age Group ◽  
Human Herpes ◽  
Pityriasis Rosea ◽  
Human Herpes Virus ◽  
The Common ◽  
One Year

<p class="abstract"><strong>Background:</strong> Pityriasis rosea (PR) is a skin eruption of unknown etiology, probably related to human herpes virus-7 (HHV-7).</p><p class="abstract"><strong>Methods:</strong> One hundred and fifteen patients with PR who presented to the dermatology outpatient department over a period of one year from May 2016 to April 2017 were included in the study. The various clinicoepidemiological features observed in these patients are recorded in the study.<strong></strong></p><p class="abstract"><strong>Results:</strong> Majority of patients (55%) belonged to the age group of 11 to 30 years with the youngest patient being 16 months of age. Mild seasonal variation was observed with maximum cases occurring during September and October. Classical PR was the common type seen and papular PR was the most common atypical presentation. Majority of the cases (78%) lasted for 4 to 5 weeks.</p><p class="abstract"><strong>Conclusions:</strong> PR is a common self-limiting disorder seen in young adults. Knowledge about the disease will help in correct management and prevent unnecessary distress to the patient.</p>

Domestic Mosquitos of the Northern Provinces of Nigeria

1919 ◽  
Vol 9 (4) ◽  
pp. 325-332 ◽  
Author(s):  
W. B. Johnson
Keyword(s):  
Seasonal Variation ◽  
West Africa ◽  
Medical Work ◽  
Domestic Species ◽  
The Common

During six years medical work in the northern provinces of Nigeria I have caught and examined every morning all the mosquitos I could find in my own bungalow. I have done this with a view to finding out which are the common domestic species in this region of West Africa, and their seasonal variation throughout the year.

No Seasonal Variation of the Sex Ratio in the Common Kingfisher Alcedo atthis Broods

2020 ◽  
Vol 54 (2) ◽  
pp. 149
Author(s):  
Monika Cepková ◽  
Mária Balážová ◽  
Mária Melišková ◽  
Lucia Rubáčová-Turčoková
Keyword(s):  
Seasonal Variation ◽  
Sex Ratio ◽  
The Common
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