نتایج جستجو برای: finned

تعداد نتایج: 1192  

Journal: :Molecular biology and evolution 2004
Alan Christoffels Esther G L Koh Jer-Ming Chia Sydney Brenner Samuel Aparicio Byrappa Venkatesh

With about 24,000 extant species, teleosts are the largest group of vertebrates. They constitute more than 99% of the ray-finned fishes (Actinopterygii) that diverged from the lobe-finned fish lineage (Sarcopterygii) about 450 MYA. Although the role of genome duplication in the evolution of vertebrates is now established, its role in structuring the teleost genomes has been controversial. At le...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Esther G L Koh Kevin Lam Alan Christoffels Mark V Erdmann Sydney Brenner Byrappa Venkatesh

The Hox genes encode transcription factors that play a key role in specifying body plans of metazoans. They are organized into clusters that contain up to 13 paralogue group members. The complex morphology of vertebrates has been attributed to the duplication of Hox clusters during vertebrate evolution. In contrast to the single Hox cluster in the amphioxus (Branchiostoma floridae), an inverteb...

2016
Kuttichantran Subramaniam Anna Toffan Elisabetta Cappellozza Natalie K Steckler Niels J Olesen Ellen Ariel Thomas B Waltzek

The short-finned eel ranavirus (SERV) was isolated from short-finned eel imported to Italy from New Zealand. Phylogenomic analyses revealed that SERV is a unique member of the genus Ranavirus, family Iridoviridae, branching at the base of the tree near other fish ranaviruses.

Journal: :The Journal of experimental biology 2000
I Plaut

The zebrafish Danio rerio exhibits substantial morphological variability in the sizes and shapes of the body and the caudal fin. The present study describes swimming performance, swimming behaviour and routine locomotor activity patterns in three of the major morphotypes: wild-type, long-finned and no-tail. Wild-type and long-finned differ in total length (TL), fork length (FL), caudal fin leng...

Journal: :Nature communications 2011
Melinda S Modrell William E Bemis R Glenn Northcutt Marcus C Davis Clare V H Baker

Electroreception is an ancient subdivision of the lateral line sensory system, found in all major vertebrate groups (though lost in frogs, amniotes and most ray-finned fishes). Electroreception is mediated by 'hair cells' in ampullary organs, distributed in fields flanking lines of mechanosensory hair cell-containing neuromasts that detect local water movement. Neuromasts, and afferent neurons ...

2014
T. Inagaki K. Komine K. Wang Takefumi INAGAKI Kenji KOMINE Jun SAKURAGI

The forced convection experiment of fan plate-finned tube heat exchangers which are mainly used in air conditioners and the forced convection model have been studied for which the heat transfer effect of this type exchangers has not been proposed by a model. All measurements were made when there is no refrigerant flow in the pipe at Reynolds's number of 580. According to the experiment results,...

2016
Ying Sun Yu Huang Xiaofeng Li Carole C. Baldwin Zhuocheng Zhou Zhixiang Yan Keith A. Crandall Yong Zhang Xiaomeng Zhao Min Wang Alex Wong Chao Fang Xinhui Zhang Hai Huang Jose V. Lopez Kirk Kilfoyle Yong Zhang Guillermo Ortí Byrappa Venkatesh Qiong Shi

Ray-finned fishes (Actinopterygii) represent more than 50 % of extant vertebrates and are of great evolutionary, ecologic and economic significance, but they are relatively underrepresented in 'omics studies. Increased availability of transcriptome data for these species will allow researchers to better understand changes in gene expression, and to carry out functional analyses. An internationa...

2002

STOCK DEFINITION AND GEOGRAPHIC RANGE There are two species of pilot whales in the Western Atlantic — the Atlantic or long-finned pilot whale, Globicephala melas, and the short-finned pilot whale, G. macrorhynchus. These species are difficult to identify to the species level at sea; therefore, some of the descriptive material below refers to Globicephala sp., and is identified as such. The spec...

2016
Naoko Takezaki Hidenori Nishihara

Determining the phylogenetic relationship of two extant lineages of lobe-finned fish, coelacanths and lungfishes, and tetrapods is important for understanding the origin of tetrapods. We analyzed data sets from two previous studies along with a newly collected data set, each of which had varying numbers of species and genes and varying extent of missing sites. We found that in all the data sets...

Journal: :Biology letters 2008
Andrew D Foote

The strength of selection to increase the span of a life stage is dependent upon individuals at that stage being able to contribute towards individual fitness and the probability of their surviving to that stage. Complete reproductive cessation and a long post-reproductive female lifespan as found in humans are also found in killer whale (Orcinus orca) and short-finned pilot whale (Globicephala...

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