scholarly journals Interspecific variation in the allelopathic potential of the family Myrtaceae

2013 ◽  
Vol 27 (1) ◽  
pp. 54-61 ◽  
Author(s):  
Maristela Imatomi ◽  
Paula Novaes ◽  
Sonia Cristina Juliano Gualtieri
Keyword(s):  
Interspecific Variation ◽  
Allelopathic Potential ◽  
The Family

scholarly journals Interspecific variation in hypoxia tolerance and hypoxia acclimation responses in killifish from the family Fundulidae

2020 ◽  
Vol 223 (4) ◽  
pp. jeb209692 ◽  
Author(s):  
Brittney G. Borowiec ◽  
Ryan D. Hoffman ◽  
Chelsea D. Hess ◽  
Fernando Galvez ◽  
Graham R. Scott
Keyword(s):  
Interspecific Variation ◽  
Hypoxia Tolerance ◽  
The Family ◽  
Hypoxia Acclimation

scholarly journals Gross brain morphology of Rhamdia quelen (Quoy & Gaimard 1824) (Ostariophysi: Siluriformes: Heptapteridae)

2018 ◽  
Vol 58 ◽  
pp. e20185842 ◽  
Author(s):  
Vitor Pimenta Abrahão ◽  
Fábio Müller dos Reis de Salles Pupo ◽  
Oscar Akio Shibatta
Keyword(s):  
Lateral Line ◽  
Interspecific Variation ◽  
Brain Morphology ◽  
The Family ◽  
Rhamdia Quelen ◽  
Anatomical Characters ◽  
The Brain ◽  
Posterior Area ◽  
Posterior Position ◽  
Half Length

The brain gross morphology of Rhamdia quelen is described and compared with seven species of six genera of Heptapteridae. Interspecific variation in shape, size, and position of brain subdivisions was observed in all examined species. The posterior position of the hypophysis on the hypothalamus and presence of a lateral subdivision on the lobus facialis are shared by all examined heptapterids. Rhamdia quelen and Pimelodella gracilis, currently considered closely related within the family Heptapteridae, exhibit the anterior and posterior area of the telencephalon with equivalent widths, and the lateral line lobe reaching the anterior area of the lobus vagi. Members of the so called Nemuroglanis sub-clade (Cetopsorhamdia iheringi, Heptapterus mustelinus, Imparfinis mirini, and Phenacorhamdia tenebrosa) share the lobus vagi proportional smaller than the lobus facialis; the lateral line lobe reaching the half length of the lobus facialis; the tectum mesencephali in contact with the telencephalon, and thinner anterior area of the telencephalon. The results reveal several features that are phylogenetically informative among the heptapterids examined, and corroborate previous hypotheses based on other non-neural anatomical characters.

Interspecific variation in life history traits of Elasmostethus (Hemiptera: Acanthosomatidae)

2018 ◽  
Vol 151 (1) ◽  
pp. 69-72 ◽  
Author(s):  
S. Kudo ◽  
Aki Yamamoto ◽  
Tadao Ichita ◽  
Haruki Tatsuta
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Maternal Care ◽  
Female Body ◽  
Egg Size ◽  
Life History Traits ◽  
Interspecific Variation ◽  
Japanese Species ◽  
Comparative Analyses ◽  
The Family

AbstractLife history traits, such as clutch size, egg size (weight), developmental periods of eggs, and female body (abdomen) size, were investigated in Japanese species of the genus Elasmostethus Fieber (Hemiptera: Acanthosomatidae): E. amabilis Yamamoto, E. brevis Lindberg, E. humeralis Jakovlev, E. interstinctus (Linnaeus), E. kerzhneri Yamamoto, and E. nubilus (Dallas). With the exception of clutch size, significant differences were observed in the traits among species. No species exhibited maternal care of eggs. These data form a solid basis for future comparative analyses in the family Acanthosomatidae, which contains both subsocial and asocial species.

Karyotypic characterization of some Liolaemus lizards in Chile (Iguanidae)

Genome ◽  
1989 ◽  
Vol 32 (3) ◽  
pp. 393-403 ◽  
Author(s):  
Madeleine Lamborot ◽  
E. Alvarez-Sarret
Keyword(s):  
Population Genetics ◽  
Pericentric Inversion ◽  
Diploid Number ◽  
Cytological Study ◽  
Interspecific Variation ◽  
Species Level ◽  
Chromosomal Variation ◽  
The Family ◽  
Karyotypic Variation

A comparative cytological study of 10 taxa of Liolaemus from different localities in Chile shows that several of them display a conservative karyotype, with six pairs of macrochromosomes similar in size and shape to other species within Liolaemus that are believed to be primitive in the family. These karyotypes may exhibit interspecific variation in the number and shape of the microchromosome pairs 7, 8, and 9 and in the chiasmata characteristics, thus permitting chromosomal characterization at the species level. Other taxa show an increased diploid number of chromosomes, mainly explained by Robertsonian derivation, pericentric inversion, translocation, and triploidy. One species presents intraspecific chromosomal variation. Thus, chromosomes can serve as genetic markers and improve our understanding of the evolution, systematics, and population genetics of these iguanids.Key words: Liolaemus (Iguanidae), karyotypic variation, chiasmata, triploidy.

scholarly journals Phenotypic differentiation of Barilius bendelisis (Cypriniformes: Cyprinidae) in four rivers from Central Indian Himalaya

2015 ◽  
Vol 63 (1) ◽  
pp. 165 ◽  
Author(s):  
Javaid Iqbal Mir ◽  
Neha Saxena ◽  
Rabindar Singh Patiyal ◽  
Prabhati Kumari Sahoo
Keyword(s):  
Factor Analysis ◽  
Cold Water ◽  
Univariate Analysis ◽  
Interspecific Variation ◽  
Head Region ◽  
Morphometric Characters ◽  
Indian Himalaya ◽  
The Family ◽  
Barilius Bendelisis ◽  
Leave One Out

<p><em>Barilius bendelisis</em>, commonly known as Indian Hill Trout is an upland water fish of South East Asia. It belongs to the family Cyprinidae and dwells in shallow, clear and cold water. In this study, the intraspecific variation of <em>Barilius bendelisis,</em> on the basis of morphometric characters, was investigated. Altogether, 402 specimens were collected from four rivers in the Central Indian Himalaya. A truss network was constructed by interconnecting 12 landmarks to yield 30 distance variables that were extracted from digital images of specimens using tpsDig2 and PAST software. Allometric transformed truss measurements were subjected to univariate analysis of variance, factor analysis and discriminant analysis. All variables exhibited significant differences between the populations. Altogether 88% of the specimens were classified into their original populations (81.98% under a ‘leave-one-out’ procedure). With factor analysis measurements of the head region, the middle portion and the caudal region had high loadings on the first and second axis. The results indicated that <em>B. bendelisis</em> has significant phenotypic heterogeneity between the geographically isolated regions of Central Indian Himalaya. We hypothesize that the marked interspecific variation in <em>B. bendelisis</em> is the result of local ecological conditions.</p>

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

Electron Microscopy of Mycoplasma Pneumoniae

1971 ◽  
Vol 29 ◽  
pp. 258-259 ◽  
Author(s):  
E. S. Boatman ◽  
G. E. Kenny
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Growth Phase ◽  
Hela Cells ◽  
Sulfonic Acid ◽  
Gamma Globulin ◽  
Horse Serum ◽  
Morphological Aspects ◽  
The Family

Information concerning the morphology and replication of organism of the family Mycoplasmataceae remains, despite over 70 years of study, highly controversial. Due to their small size observations by light microscopy have not been rewarding. Furthermore, not only are these organisms extremely pleomorphic but their morphology also changes according to growth phase. This study deals with the morphological aspects of M. pneumoniae strain 3546 in relation to growth, interaction with HeLa cells and possible mechanisms of replication.The organisms were grown aerobically at 37°C in a soy peptone yeast dialysate medium supplemented with 12% gamma-globulin free horse serum. The medium was buffered at pH 7.3 with TES [N-tris (hyroxymethyl) methyl-2-aminoethane sulfonic acid] at 10mM concentration. The inoculum, an actively growing culture, was filtered through a 0.5 μm polycarbonate “nuclepore” filter to prevent transfer of all but the smallest aggregates. Growth was assessed at specific periods by colony counts and 800 ml samples of organisms were fixed in situ with 2.5% glutaraldehyde for 3 hrs. at 4°C. Washed cells for sectioning were post-fixed in 0.8% OSO4 in veronal-acetate buffer pH 6.1 for 1 hr. at 21°C. HeLa cells were infected with a filtered inoculum of M. pneumoniae and incubated for 9 days in Leighton tubes with coverslips. The cells were then removed and processed for electron microscopy.

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