نتایج جستجو برای: a small crustacean

تعداد نتایج: 13560228  

Journal: :Journal of General Physiology 1957

Journal: :Proceedings. Biological sciences 2008
Petra Ungerer Gerhard Scholtz

The complex spatio-temporal patterns of development and anatomy of nervous systems play a key role in our understanding of arthropod evolution. However, the degree of resolution of neural processes is not always detailed enough to claim homology between arthropod groups. One example is neural precursors and their progeny in crustaceans and insects. Pioneer neurons of crustaceans and insects sho...

Journal: :Revue suisse de zoologie. 1974

Journal: :PloS one 2016
Ilmar Tõnno Helen Agasild Toomas Kõiv Rene Freiberg Peeter Nõges Tiina Nõges

Small-bodied cladocerans and cyclopoid copepods are becoming increasingly dominant over large crustacean zooplankton in eutrophic waters where they often coexist with cyanobacterial blooms. However, relatively little is known about their algal diet preferences. We studied grazing selectivity of small crustaceans (the cyclopoid copepods Mesocyclops leuckarti, Thermocyclops oithonoides, Cyclops k...

2003
GUGS LUSHAI DAVID A. S. SMITH JOHN A. ALLEN NORMAN MACLEAN

Molecular clocks based on sequence change in mitochondrial (mt) DNA have been useful for placing molecular phylogenies in their historical context, thereby enhancing evolutionary insight. Nonetheless, despite their importance to phylogeographers, the methodology is controversial. Here we report on two mitochondrial clocks for the butterfly genus Danaus based on sequences from the cytochrome c o...

Journal: :The Biological Bulletin 1976

Journal: :PeerJ 2021

Small waterbodies are a unique aquatic ecosystem with an increasing recognition for their important role in maintaining regional biodiversity and delivering services. However, small Northwest Yunnan, one of the most concerned global hot-spots, remain largely unknown. Here, we investigated community structure crustacean zooplankton relationships limnological, morphometric spatial variables highl...

Journal: :Geological Magazine 1872

Journal: :Proceedings. Biological sciences 2015
Peter A Biro Portia Sampson

Size-selective harvest of fish and crustacean populations has reduced stock numbers, and led to reduced growth rates and earlier maturation. In contrast to the focus on size-selective effects of harvest, here, we test the hypothesis that fishing may select on life-history traits (here, growth rate) via behaviour, even in the absence of size selection. If true, then traditional size-limits used ...

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