microcephalus


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Related to microcephalus: hydrocephalus, spina bifida
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Noun1.microcephalus - an abnormally small head and underdeveloped brain
abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies
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The occurrence of a greater females proportion compared to males in a fish population is also reported by Mazzoni and Silva (2006) in Bryconamericus microcephalus, having found a sex ratio of 2.20:1 (female:male).
Response of bighead carp Aristichthys nobilis and Asian catfish Clarias microcephalus larvae to free-living nematode Panagrellus redivivus as alternative feed.
The most extreme example of this case are the species of the Dendropsophus microcephalus group where the only structure formed are the jaw sheaths without the presence of both marginal papillae or labial tooth rows and ridges; such condition has been proposed as a putative synapomorphy for this group by Faivovich et al.
Two additional native fishes, partially armored threespine stickleback, Gasterosteus aculeatus microcephalus, (last recorded in 1939) and southern steelhead, Oncorhynchus mykiss (Swift et al.
These fisheries include the crab fisheries (which target red king crab, Paralithodes camtschaticus; blue king crab, Paralithodes platypus; golden king crab, Lithodes aequispinus; opilio crab, Chionoecetes opilio; and Tanner crab, Chionoecetes bairdi), the rockfish fishery (which catches mainly rougheye, Sebastes aleutianus; short-raker, Sebastes borealis; and thorny-head, Sebastolobus alascanus), the non-pollock trawl catcher-processor fleet (which targets mainly Pacific cod, Gadus microcephalus; yellowfin sole, Limanda aspera; flathead sole, Hippoglossoides elassodon; rock sole, Lepidopsetta bilineata; and Atka mackerel, Pleurogrammus monopterygius), and many other fisheries which remain in legacy management.
This SI5N value is also higher than that reported for marine fish from the Arctic, including top predators such as the Greenland shark (Somniosus microcephalus) (McMeans et al., 2013).
microcephalus were collected in 2013, one collected from Puget Sound and the other from Unimak Pass in the northern Gulf of Alaska (see details for all collections in Table 1).
In some cases, most often in bilateral presentations, additional systemic/nonocular defects such as clef lip or basal encephalocele, agenesis of the corpus callosum, midbrain deformity, microcephalus, and saddle nose have been observed.
Sperm whales (Physeter microcephalus) are the largest of them.
Tests have revealed the Greenland shark (Somn/osus microcephalus) can live for at least 272 years, which so far is considerably longer than any other vertebrate we know of.