Happy new year 2021 to all our members and visitors! CORONAVIRUS safety tips from Admin! 1. Watch your hands with running water 2. Dont cough in your hands 3. Keep distance from people 4. Stay indoor if neccessary!! Stay safe !!! Dear Members,Do you know that naijacrux is fully programmed to serve you better, Do you know that you can share your favorite post on naijacrux with friends on twitter,facebook, googleplus,myspace and many more! To share post on naijacrux with friends and family on twitter, facebook,googleplus,myspace,and many more, scroll to the down page of the post, Click on the Social Icon You Want To Share On To Share.

Author Topic: Fresh Report shows that Pesticides may be lowering sperm count of bees  (Read 863 times)

0 Members and 1 Guest are viewing this topic.

Offline yungcrux

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 1495
  • Karma: +0/-0

New research has found that a controversial class of neurotoxins used in agriculture for pest control significantly impairs the fertility of male honeybees. Bee numbers in Europe and the US have been falling for years.

The Institute of Bee Health at the University of Bern, Switzerland has carried out a study to explore the effects of two popular neonicotinoids, thiamethoxam and clothianidin, on the sperm of drones, or male honey bees.
Lead researcher Lars Straub said the presence of the chemicals could be "one reason behind the struggling bee numbers we've seen over the past 15 years in the northern hemisphere."
The pesticides are widely used in the USA. The European Commission is currently reviewing a temporary ban it imposed in 2013.

There has been an alarming decline in the bee populations in North America and Europe over the past 15 years. Bees account for an estimated 80 percent of plant pollination by insects.

'Inadvertent contraceptive effects'

The researchers, led by Straub in Bern assigned batches of drones from 20 bee colonies to either insecticide exposure or control groups. They then took semen samples from males once they had reached sexual maturity.
The study published in the British journal Proceedings of the Royal Society B showed that widespread neonicotinoid use may have "inadvertent contraceptive effects" on the insects which provide fertilisation worth billions of dollars every year.
Male honey bees exposed to the neonicotinoids at levels found in fields showed, on average, around 39 per cent less living sperm. In addition, the mortality rate of the drones exposed to the pesticides during the study was almost doubled.

Honey bee queens make a single mating flight from the nest to collect sperm from as many as 20 different males, which they store within a dedicated organ over their entire lifespan. This is essential for the hive's survival as it provides genetic diversity which is essential for resistance to disease, parasites and environmental challenges.
"The process of the queen's mating flight is a one-time thing so it's really important that she collects plenty of quality sperm," Straub said. If she does not, then worker bees will sense the queen is ineffective and kill her. "As the primary egg layer and an important source of colony cohesion, the queen is intimately connected to colony performance," the paper said.
The new study adds reduced sperm quality to the list of possible causes for "colony collapse disorder" in Europe, North America and elsewhere, which has alternatively been blamed on mites, a virus or fungus, pesticides or a combination of all of them.
Previous studies have found neonicotinoids can cause bees to become disorientated to the extent that they cannot find their way back to the hive, and can lower their resistance to disease.


Last Three Years Named The Hottest Years on Record, UN Report Says

Started by punch

Replies: 0
Views: 893
Last post March 23, 2018, 06:13:07 AM
by punch
Year 2016 Name Warmest Year on Record - Global Study Report

Started by newspostng

Replies: 0
Views: 990
Last post August 11, 2017, 02:16:27 AM
by newspostng
Fresh Ebola fears as passenger flying from Nigeria to JFK dies after vomiting

Started by admin

Replies: 0
Views: 1569
Last post October 17, 2014, 01:06:26 PM
by admin
Liberia shut down Border With Guinea Amid fresh Ebola Case

Started by yungcrux

Replies: 0
Views: 881
Last post March 24, 2016, 01:08:03 AM
by yungcrux
Fresh Study Links Social Media Addicts, Substance Abusers

Started by newspostng

Replies: 0
Views: 11665
Last post January 16, 2019, 07:24:58 AM
by newspostng
Antibodies Offer Hope in Battling AIDS - Fresh Research

Started by mastercode

Replies: 0
Views: 873
Last post November 30, 2016, 07:01:58 AM
by mastercode
Fresh Illness Causing Paralysis in Children Baffles Doctors

Started by bellanaija

Replies: 0
Views: 4997
Last post October 17, 2018, 01:33:42 PM
by bellanaija
Fresh Study Warns of Risks from Inactive Ingredients in Drugs

Started by guruslodge

Replies: 0
Views: 3529
Last post March 18, 2019, 07:27:23 AM
by guruslodge
New study reveals Fresh Dementia Concerns From Playing Pro Soccer

Started by yungcrux

Replies: 0
Views: 13975
Last post October 23, 2019, 08:37:21 AM
by yungcrux
Reading May Extend Lifespan - Fresh Study by Researchers

Started by yungcrux

Replies: 0
Views: 722
Last post August 10, 2016, 07:10:25 AM
by yungcrux