RJB-VOLUME 02 ISSUE 03 MAY 2012


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Volume 2 Issue 3, May 2012

Research Journal of Biology 

ISSN

2049-1727

Publication Frequency

6 Issues per year

Pages

79-116

Publication History

 

Original Articles


Influence of Illumination and Polarized Moonlight on Light-Trap Catch of Caddisflies (Trichoptera)

L. Nowinszky, O. Kiss, F. Szentkirályi, J. Puskás and M. Ladányi

Pages 79-90

Abstract

 

Ompok pabo (Hamilton, 1822) of Tripura, India: an Endangered Fish Species in Relation to Some Biological Parameters

S. Banik and Pampa Bhattacharya

Pages 91-97

Abstract

 

 

Comparative Study on Regeneration Potentiality of Aromatic Indica Rice (Oryza sativa L.) of Bangladesh

Golam Gaus Mohiuddin Chowdhury, M. Ashrafuzzaman, F. Raihan and Shamsul H. Prodhan

Pages 98-103

Abstract

 


Determination of Genetic Relationship among Cheirolepis (Centaurea/ Asteraceae) Section and its Relatives in Turkey

Tuna Uysal, Eda Özel, Kuddisi Ertuğrul and Meryem Bozkurt

Pages 104-109

Abstract

 

 

Genetic Diversity in Threatened Populations of the Endemic Species Centaurea lycaonica Boiss. & Heldr (Asteraceae)

Tuna Uysal, Eda Özel, Meryem Bzkurt and Kuddisi Ertuğrul 

Pages 110-116

Abstract


 




Title

Influence of Illumination and Polarized Moonlight on Light-Trap Catch of Caddisflies (Trichoptera)

Abstract

The study analysed the potential effects of moon phases on the light-trap catches of eight species from seven Trichoptera families. The light-traps operated between 1981 and 2005 at ten Hungarian sampling sites. Relative catches calculated from daily collected data were arranged by the moon phase angle groups within lunar cycle. Linear and non-linear regression analyses were carried out to test the influences of two moonlight variables (illumination of the moon and rate of polarized moonlight) and the collecting distance changing with moon phase angle groups on the averaged relative catch. The relative catch level of caddisflies significantly varied in a species-specific way to changing moonlight characteristics through the lunar month. Two species showed a rising trend of catch levels with increasing moonlight illumination around the full moon period. Only one species expressed significantly increasing relative catches by the increasing theoretical collecting distance caused by the decreasing moonlight illumination between full and new moon. The study demonstrated for the first time the effect of increasing polarized moonlight in the first and last quarter on the flying activity of five caddisfly species. Supposedly, caddisflies use these moonlight characteristics as orientation cues increasing the number of flying and, consequently, captured adults.

 

Keywords

Caddisflies, Light-Trapping, Polarized Moonlight, Illumination, Moon Phase, Orientation

 

Title

Ompok pabo (Hamilton, 1822) of Tripura, India: an Endangered Fish Species in Relation to Some Biological Parameters

Abstract

Ompok pabo (Hamilton, 1822) is an endangered fish having greater commercial importance. This fish species did not receive proper attention in aquaculture view point. Occurrence and abundance of this species is greatly declined due to ecological degradation of the habitat, environmental pollution and over exploitation. In order to get some biological information Length-weight relationship and condition factor (K) of this fish species is noticed in the present studies. Length weight relationship followed the cube-law indicating an isometric pattern of growth. The variation of regression co-efficient (b) noted in this species may be due to sex size, seasonal environmental change etc. The ‘r’value indicates positive correlation of the length and weight. Variation in the condition factor may be due to the influence of gonadal maturity, spawning season etc. The results of condition factor (= 1.0) probably indicates that the overall physical and physiological features are considerable. Condition factor of the studied fish species also reflects its gonadal maturity and spawning season. As per IUCN assessment Ompok pabo is placed at near threatened category version 3.1.

 

Keywords

Length-Weight Relationship, Condition Factor, Ompok pabo, Tripura

 

Title

Comparative Study on Regeneration Potentiality of Aromatic Indica Rice (Oryza sativa L.) of Bangladesh

Abstract

In this study, two varieties of aromatic rice (Oryza sativa L.) BRRI Dhan 50 (Bangla Moti) and BRRI Dhan 34 (Khaskhani) were used to establish a suitab-le system for callus initiation and regeneration. MS (Murashi-ge & Skoog, 1962) media supplemented with different concentrations i.e. (1.0, 2.0, 3.0, 4.0 mg/L of 2,4-D (2,4-dichlorophenoxyacetic acid) and combination with BAP (6-benzylaminopurine), (2.0 mg/L) were used for callus induction from mature dehusked rice seeds. MS medium supplemented with only 3.0 mg/L of 2,4-D, produced maximum percentage of callus that is 90% for BRRI Dhan 50 and 80% for BRRI Dhan 34. On the other hand, MS media with 3.0 and 4.0 mg/L of 2,4-D in combination with 2.0 mg/L BAP produced highest percentage of callus (80 %) for BRRI Dhan 50 and 70 % for BRRI Dhan 34. For plantlet regeneration, MS media with 1.0 mg/L NAA (1-Napthaleneacetic acid), 2.0 mg/L BA (6-benzyladenine) and various concentrations of Kinetin (0.0, 1.0, 2.0, 3.0, 4.0 mg/L) were employed. The maximum percentage of shoot regeneration was recorded at MS media supplemented with 4.0 mg/L of Kinetin +1.0 mg/L NAA and 2.0 mg/L BA for both varieties. These results will be very helpful to improve rice quality through somaclonal variation and genetic transformation.

 

Keywords

Garcinia kola Seed Oil, Antimicrobial, Secondary Metabolites, Clinical Microbial Isolates

 

Title

Determination of Genetic Relationship among Cheirolepis (Centaurea/ Asteraceae) Section and its Relatives in Turkey

Abstract

Many molecular marker techniques are available nowadays. PCR-based approaches like ISSR are in demand due to their simplicity and requirement of only small quantities of sample DNA. Because of this case, ISSR was preferred to detect genetic relationship among some of the Centaurea L. species in Cheirolepis (Boiss.)Hofm. and its relatives sections throughout this study. We used ten primers, which showed sixty-eight bands in ISSR analyses. Genetic similarities were calculated for all species. Dendogram was obtained with the UPGMA program, which is based on Nei’s genetic similarity index. Polymorphisms between these species were determined by using ISSR analyses. A principal component analyses (PCA) were performed to see dispersion of all studied species and a meaningful explanation on variation was obtained by using three-dimensional graphics. The results concluded that polimorphism level was very high (100%) and genetic variation was enough to determine the separation of the closely related species. Moreover, the results based on clustering analyses and PCA have not displayed absolutely a correlation with the arrangement of these species in Flora of Turkey.

 

Keywords

Centaurea, Cheirolepis, Pseudoseridia, Chartolepis, Molecular Markers, Turkey

 

Title

Genetic Diversity in Threatened Populations of the Endemic Species Centaurea lycaonica Boiss. & Heldr (Asteraceae) 

Abstract

The genus Centaurea has numerous local and threatened endemic species in Turkey. However, information on the genetic diversity in these species is lacking. The aim of this study is to describe the genetic diversity of the populations of the threatened Centaurea lycaonica species, which was first discovered in 1845 in the Konya region in Turkey. In our study, a total of 160 unique bands were identified from a random sampling of 62 individuals in the populations using six RAPD primers and four ISSR primers. These primers were used to measure the level of genetic differences among individuals and to determine the polymorphisms in two natural populations of C. lycaonicathat are geographically separated. Of the bands scored, 91% (145 bands) were polymorphic and 9% (15 bands) were monomorphic. These results indicate that these populations have high genetic diversity to survive in this area. However, due to the low number of populations this species would need to be preserved both in situ and ex situ methods in the future.

 

Keywords

Population Genetics Molecular Markers, Compositae, Section Phalolepis, Turkey