Navigation Links
Birth rate, competition are major players in hominid extinctions

Modern human mothers are probably happy that they typically have one, maybe two babies at a time, but for early hominids, low birth numbers combined with competition often spelled extinction.

"The lineages of primates have some traits that make it hard for them to respond to rapid perturbations in the environment," says Dr. Nina G. Jablonski, professor of anthropology and department head at Penn State. "Through time we see a lot of lineages become extinct when environments where the species are found become highly seasonal or unpredictable."

Primates evolved in the Paleocene and Eocene when worldwide climate was less seasonal. The beneficial environment allowed primates to evolve as relatively brainy animals that reproduce slowly. However, when climate changed so that tropical forests shrunk and the environment became patchy, many species including primate species became extinct.

"While past primate populations moved with the forest, early hominid cultures 2.5 million years ago show signs of the ability to live in marginal areas and live on more dynamic, seasonal landscapes," Jablonski told attendees today (Feb. 16) at the annual meeting of the American Association for the Advancement of Science in San Francisco.

Through time, the human lineage evolved to fill a wide variety of ecological niches, but those species that filled narrow environments, were less able to withstand the effects of climate change. Paranthropus boisei, a Pleistocene hominid, thrived around 2.5 million years ago, but disappears from the fossil record a million years ago. Paranthropus boisei became extinct when it was unable to compete with other mammals.

A specialized feeder, Paranthropus boisei dined on hard objects like seeds, tubers and bones. While it had a variety of food sources, they all required the crunching, grinding force of its teeth. Unfortunately, bush pigs and hyenas had great grinding and crushing teeth, too, and went after
'"/>

Source:Penn State


Page: 1 2 3

Related biology news :

1. Breast-Cancer Risk Linked to Exposure to Traffic Emissions at Menarche, First Birth
2. Birth defects: 8 million annually worldwide
3. Neandertal femur suggests competition with hyenas and a shift in landscape use
4. HIV exploits competition among T-cells
5. Columbia research lifts major hurdle to gene therapy for cancer
6. Researchers uncover sequence of major rice pathogen
7. Emergence of cancer as major cause of childhood death in developing countries is not being adequately addressed
8. Biochemists report discovery of structure of major piece of telomerase; implications for cancer
9. Virologists make major step towards understanding the process of HIV infection
10. Biota makes major antiviral discovery
11. New gene scanning technology marks a major advance in disease research
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Birth rate competition are major players hominid extinctions

(Date:6/24/2015)... Research and Markets( ... "Huawei Ascend Mate 7 Fingerprint Sensor - ... Huawei,s technological choice for the fingerprint ... Apple,s and Samsung,s one. The Ascend Mate 7 ... Cards, a main actor in capacitive sensing human ...
(Date:6/23/2015)... GARDENS, Fla. , June 23, 2015 ... identity management and authentication solutions, today announced enhanced ... strong, multi-factor authentication solution.  The enhancements build ... use of the DigitalPersona Altus platform and ... reader compatibility. In today,s environment ...
(Date:6/17/2015)... , June 17, 2015  Synaptics Inc. (NASDAQ: ... solutions, today announced that Xiaomi, one of the ... ® ClearPad ® family of capacitive ... integrated circuits (DDICs) for its latest smartphones, the ... ClearPad for full in-cell display solutions and DDICs ...
Breaking Biology News(10 mins):Huawei Ascend Mate 7 Fingerprint Sensor - Reverse Costing Analysis 2Crossmatch Releases Enhanced DigitalPersona Altus Advanced Authentication Functionality 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 3
... the RIKEN Center for Genomic Medicine, Hiroshima University Hospital ... associated with the development of liver cancer in chronic ... a study of 3,312 Japanese individuals and appear in ... (HCC), the most common type of liver cancer, is ...
... shown for the first time that the loudest animal on ... boatman, Micronecta scholtzi . At 99.2 decibels, this represents ... sitting in the front row. The frequency of the ... Dr. James Windmill of the University of Strathclyde, explains one ...
... quickly and accurately through dense forests may lead to new ... pigeons to fly through an artificial forest with a tiny ... "Attaching the camera to the bird as well as ... what the bird sees and how it moves," says Dr. ...
Cached Biology News:Auto-pilots need a birds-eye view 2
(Date:7/2/2015)... ... ... in countless labs for decades. In the past, people had to go to a ... a daunting and tiring process looking at endless data tables and charts. Often time’s, ... catalog structure. , Now thanks to FireflySci, scientists are throwing away those old books and ...
(Date:7/2/2015)... ... ... Sleepless nights will become obsolete as Luzi , a sophisticated smart ... June 23. Sound sleepers and the sleep deprived both will love Luzi for its ... integration of the Bluetooth speaker, alarm clock and ability to charge various devices, including ...
(Date:7/1/2015)... July 1, 2015   Decision Resources Group ... advantages of Otezla are its oral administration, alternative ... reported by surveyed rheumatologists. Otezla was the first ... treatment of active psoriatic arthritis in ... of care includes conventional oral treatments including disease-modifying ...
(Date:7/1/2015)... , July 1, 2015  Axovant Sciences ... focused on the treatment of dementia, today announced ... on July 22 at 5:45 p.m. EDT following ... Alzheimer,s Association International Conference 2015 (AAIC). ... , Dr. Lawrence Friedhoff , ...
Breaking Biology Technology:New Cuvette E-Commerce Website Launched by FireflySci 2Luzi Smart Lamp Recently Launched Indiegogo Campaign 2Luzi Smart Lamp Recently Launched Indiegogo Campaign 3Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 2Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 3Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 2Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 3
... Amsterdam Molecular Therapeutics (Euronext: AMT), a leader in the ... has raised € 2.5 million in new equity by means ... Forbion Capital Partners, Gilde Healthcare Partners and Advent Venture Partners. ... agreed to issue 7,352,938 new shares at a price of ...
...  MiMedx Group, Inc. (OTCBB: MDXG), an integrated developer, ... and bioimplants processed from human amniotic membrane, announced ... to sell convertible notes and warrants has been ... commenced on October 15, 2011, the Company received ...
... many Americans are resolving to address financial issues or lose ... are looking to find answers to an important question – ... which was commissioned by Identigene, the largest direct-to-consumer DNA paternity ... the only paternity test available at the drug store, reveals ...
Cached Biology Technology:Amsterdam Molecular Therapeutics Announces € 2.5 Million Equity Raise 2MiMedx Group Completes $5,000,000 Private Placement 2MiMedx Group Completes $5,000,000 Private Placement 3Survey Reveals Paternity Questions Loom for More Than One in 10 Americans 2Survey Reveals Paternity Questions Loom for More Than One in 10 Americans 3
... contains sufficient materials for 1,464 array sample elements. , ... each , Blocker BSA in PBS (10X): 50 ... , BupH Phosphate Buffered Saline: 8 packs , ... West Pico Luminol Enhancer: 2 x 25 ml , ...
... counts cells based on specific fluorescence labelling ... so that other non cellular particles do ... 250 m square quartz cuvette each cell ... used as a counting signal and information ...
... Accurate Results Laser Capture Microdissection (LCM) ... and accuracy of molecular assays by starting ... multi-cellular structures isolated from whole tissue or ... in 1996 at the National Institutes of ...
Mouse monoclonal antibody raised against a partial recombinant DHX8. NCBI Entrez Gene ID = DHX8...
Biology Products: