Early amphibian globetrotters?

Article Abstract:

Carboniferous tetrapod fossils in Australia prove the presence of at least three types of tetrapod, including the family Colosteidae, in the Lower Carboniferous. The fossils indicate progress of tetrapod morphology and the water-land transition throughout the equatorial belt. Different tetrapod groups may have diversified at the same time in different regions of the equatorial belt. Stem-amphibians and stem-amniotes may also have been present during the Lower Carboniferous period of terrestrial vertebrate history. The tetrapod group, Seymouriamorpha, is examined.

Reports, Evolution (Biology), Paleontology, Carboniferous period, Vertebrates, Fossil, Fossil vertebrates

---

A declining amphibian conundrum

Article Abstract:

There is no single cause for the significant declines among some amphibian populations recorded in many parts of the world since the late 1980s, according to the Declining Amphibian Populations Task Force. However, it has been established that the same pathogen, a chytrid fungus, is responsible for mortality among frog populations in Panama and Queensland, Australia. This is the first chytrid fungus to have been identified as a vertebrae pathogen. It seems to attack only adult amphibians, probably as it only attacks skin containing the protein kertin.

Diseases

---

Amphibian breeding and climate

Article Abstract:

Analysis of the breeding cycles of amphibians shows that changes in these cycles depend on the escalating winter and spring average temperatures. Study of the relationships of spawning or pond arrival time of temperate amphibians with average temperatures and rainfall confirms that amphibian reproductive cycles in temperate countries are sensitive to climatic change.

Research, Analysis, Physiological aspects, Environmental aspects, Climatic changes, Climate change, Breeding, Sexual cycle

Similar abstracts:

• Abstracts: Early brain growth in Homo erectus and implications for cognitive ability
• Abstracts: Braiding patterns on an inclined plane. Moulting arthropod caught in the act
• Abstracts: Continuing decline in the growth rate of the atmospheric methane burden. Disruption of extended defects in solid oxide fuel cell anodes for methane oxidation
• Abstracts: Hot winds stay in the plane. Peering between the clouds. Large size of Lyman-alpha gas clouds at intermediate redshifts
• Abstracts: Distribution of caribou and wolves in relation to linear corridors. Antler loss and udder distention in relation to parturition in caribou

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.