CLIMATE
FISH
FISH
The cichlid fish of Lake Malawi continue to be studied for their genetic and morphological evolution. This article illustrates how epigenetics plays a role in the creation of new species.
The fight against mosquito-borne diseases could be accelerated by a compound found in... sardines! Conclusive studies on the subject are presented in this article.
Otoliths (calcified parts in the head of fish) are a mine of information about an individual. The use of Raman spectroscopy on otoliths enables us to retrace a fish's migratory path.
Mulefish caught in the Mediterranean and released into the Sea of Galilee have been infected by a parasite that spreads rapidly. Scientists are warning fishermen and breeders.
Climatic, geographical and meteorological conditions are just as important as human activities among the factors that lead to freshwater fish invasions.
Sabrefish (Trichiurus) are little-known deep-sea animals. A research group is reconstructing their genetic history from the Pleistocene to the present day.
"The schizothoracine is a species of fish in the family Cyprinidae on the brink of extinction. The complete study of its genome could make it possible to protect the species and, more broadly, freshwater fish."
Some fish colonies in the southwest Atlantic are showing good resilience in the face of climate change and declining coral populations. A case rare enough to be worth noting.
Eel reproduction is one of oceanography's greatest mysteries. The first direct evidence of adult European eels migrating to their breeding grounds in the Sargasso Sea has recently been collected.
This study shows an even higher level of sex chromosome rotation than previouslythoughtin cichlids. This could explain the rapid speciation (creation of species) in this family of fish.
Striped Marlins seem to coordinate to hunt in schools of fish. However, prey sharing is highly inequitable. Newly arrived individuals in the hunting groups seem to have an advantage.
The microbiota of 101 species of marine fish were carefully analyzed. Fish have a much higher microbial diversity (and exposure to microbes) than marine mammals.
The removal of otoliths (calcified part of the head) is lethal in fish, but necessary for their study. This article shows how non-lethal blood sampling could replace it for endangered species (e.g:eels).
This spectacular study compares energy losses and gains (after prey consumption) for sailfish hunting alone versus in groups. Those capable of hunting alone would have an advantage...
Goatfish (and probably other closely related species) have particularly long life spans. Some individuals reach 90 years of age! This information is vital if we are to protect these species from overfishing.
Angelfish are species that are frequently hybridized in aquariums. This study shows that the gradual change of microbes in their intestines is the beginning of speciation in these animals.
This article details a non-invasive photographic protocol for studying seahorses without damaging them. Seahorses are fragile and oftenthreatened.
The study of sedimentary and glacial plankton enables us to reconstruct past climates. Strong temperature gradients during the Ice Age in the North Atlantic Ocean have been revealed in this way. Understanding past climate means anticipating future climate.
The genome of the Chinese icefish (Neosalanxtaihuensis) has been fully compiled, with no gaps. This is an important step in its conservation, as it is an animal that is heavily exploited by humans.
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