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Shark teeth offer clues to ancient climate change（图）
Shark teeth clues ancient climate change
2021/2/5
A character in a great white shark movie said that all sharks do is "swim and eat and make little sharks."It turns out they do much more than that. Sharks have roamed Earth's oceans for more than 400 ...
Body size of the extinct megalodon shark is off the charts（图）
Body siz extinct megalodon shark off the charts
2020/10/16
A new study shows that the body size of the iconic gigantic or megatooth shark, about 15 meters (50 feet) in length, was indeed anomalously large compared to the body sizes of its relatives.Formally c...
Large marine protected areas effectively protect reef shark populations,Stanford scientists find
Large marine protected areas reef shark populations Stanford scientists
2017/2/16
Originating 423 million years ago, sharks are a group of predators that span 490 species and still play crucial roles within their ecosystems. We often characterize these top predators as nearly indes...
How do shark teeth bite?Reciprocating saw,glue provide answers
shark teeth Reciprocating saw glue
2016/9/29
Sharks have a big reputation for their teeth.The ocean predators use their buzz saw mouths to efficiently dismantle prey, ranging from marine mammals and sea turtles to seabirds and — as Hollywood lik...
Ancient shark teeth give clues to future of Arctic climate change
Sharks The North Pole. Tundra Animal Temperate forests Temperature The ocean Deep sea
2014/7/18
A new study of sharks that lived in warm Arctic waters millions of years ago suggests that some shark species could handle the falling Arctic salinity that may come with rising temperatures.
A new scientific study has identified two distinct populations of white shark at the east and west of Bass Strait in Australian waters, prompting researchers to suggest the huge fish may need regional...
When the "primitive" shark Tribodus(Hybodontiformes) meets the "modern" ray Pseudohypolophus (Rajiformes): the unique co-occurrence of these two durophagous Cretaceous selachians in Charentes(SWFrance)
Hybodontiformes Tribodus Rajiformes Pseudohypolophus Palaeoecology Palaeobiogeography
2009/10/20
The palaeoecology and palaeobiogeography of two Cretaceous selachian genera, Tribodus BRITO & FERREIRA,1989 and Pseudohypolophus CAPPETTA & CASE, 1975, are briefly discussed. These two similar-sized t...
The Late Jurassic neoselachian Macrourogaleus FOWLER,1947 is a palaeospinacid shark(Elasmobranchii;Synechodontiformes)
Neoselachii Palaeospinacidae Macrourogaleus Late Jurassic
2009/10/20
The taxonomy of palaeospinacid sharks (Chondrichthyes, Neoselachii) is reviewed. New skeletal material from the famous Late Jurassic lithographic limestones of southern Germany (Solnhofen area and Nus...
New information on the Devonian shark Mcmurdodus,based on material from western Queensland,Australia
Mcmurdodus Devonian Hexanchiformes Echinorhinus Prismatic calcified cartilage
2009/10/20
Histological structure of the type and newly collected teeth of the shark Mcmurdodus whitei TURNER &YOUNG,1987, from a Devonian (?late Emsian-early Eifelian) limestone outcrop in the Cravens Peak Beds...
10 April 2007,Blue spotted stingray in Moreton Bay. Photo: Susan Theiss UQ researchers have shown that stingrays, once thought to be colour-blind, may be capable of seeing in colour.They have shown th...
30 March 2007,The loss of large sharks in the northwest Atlantic has cascading effects leading to a sharp decline in scallop, clam, oyster, and other shellfish populations, researchers report in the 3...
03 April 2007,Baby sharks grow slowly, changing their fins as they grow and can see a month before they leave their eggs, according UQ research.UQ Marine Science PhD student Blake Harahush, of the Sch...