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Archive for the ‘bees’ Category

Honey Bees Are Not The Best Insect Pollinators

Honey Bees Are Not The Best Insect Pollinators

During the past ten to fifteen years, entomologists and other scientists all over the world have been discussing the issue of declining bee populations around the world. Obviously, the declining bee population is alarming due to the fact that bees are earth’s primary pollinators. Much of the time, news stories on this topic mention dwindling honey bee populations while ignoring all other bee species. You may be thinking that honey bees are addressed more often than other bee species because honey bees are the most important pollinators. However, this is not necessarily the case, as a recent study has demonstrated that only one third of crop plants in the United Kingdom are pollinated by honey bees, and even fewer honey bees pollinate wild plant life in the country. Bumblebees pollinate far more plants than honey bees, and new research is showing that honey bees can even contribute to the current global bee population crisis.

In addition to honey bees, insects like flies, butterflies and other bee species also pollinate plants. Naturally, some insects pollinate plants more rapidly than other insects. There are many factors that determine how effectively certain insect species will pollinate plants. Insects that are big and hairy, like bumblebees, end up pollinating the highest amount of plants since pollen easily becomes stuck within their hairs. This pollen eventually dislodges from the bumblebees body and winds up falling on a flower, successfully pollinating the flower. Honey bees can even spread exotic plants and pathogens that often kill other pollinating insects. In this case, honey bees contribute to the global drop in pollinating bee species.

Do you think that the population decline affecting bee species could be caused by a disease that only affects bees?

The Bees That Drink Your Bodily Fluids

The Bees That Drink Your Bodily Fluids

Believe or not, but your bodily fluids are in high demand. You cannot get paid for your tears and sweat, but bees would certainly appreciate a heaping helping of your perspiration. Your sweat and tears are highly sought after by hundreds of different bee species. So why on earth do bees consume sweat and tears? Well it turns out that your bodily fluids are quite nutritious. This is the best explanation that researchers can come up with concerning the love that bees have for mammalian bodily fluids. Bees are selective when it comes to the bodily fluids that they consume. For example, bees prefer sweat and tears that are extra salty. This is why bees prefer human bodily fluids over bodily fluids from all other animals. Humans have relatively high amounts of salt in their tears as a result of consuming salty processed foods. This preference for sweat and tears is so common that even the latest bee to be discovered cannot get enough of that salty goodness.

The large group of wild bees that seek out mammalian perspiration are small relative to many other types of bees. This is why flying sweat-bees go unnoticed by people most of the time. Also, people rarely take notice of wild sweat-bees because they do not sting. Even if a sweat-bee landed on a person’s arm or leg, they will most likely go unnoticed. Sweat-bees are plentiful in the United States. In fact, the latest bee to be discovered was found and captured in Brooklyn, New York. This new sweat-loving bee species has been named Lasioglossum gotham.

In order to determine just how much certain bees love sweat and tears, researchers used themselves as guinea pigs in an experiment. Researchers in Thailand gathered several different species of bee, all of which consumed mammalian bodily secretions. The researchers sat in a room with their eyes wide open. The room also contained significant amounts of meat, Ovaltine, cheese and a variety of other foods. Much to the surprise of the researchers, each bee species preferred to consume the human tears as opposed to the other edible items that were available. In the experiment the bees landed near the researcher’s eyes for a quick tear fix. Of course, the researchers automatically blinked when the bees approached their eyes, but the bees were persistent, so they kept making efforts to consume the researcher’s tears.

There was one particular bee species, Lisotrigona, that landed on the researchers eyes so softly, that the researchers did not even notice the bee’s presence. Even when one researcher walked about the room the bee that was actively consuming his tears went unnoticed. Not surprisingly, it became uncomfortable when several bees attempted to consume the researcher’s tears. Bees even desperately tried to access more tears after the researchers closed their eyelids. Bees likely prefer tears and sweat due to their high protein content. Eventually, the research team captured two hundred and sixty two bees by using their own eyes as bait.

Would you be willing to let a bee drink your tears for science?

Bees Work Together In Order To Roast Predatory Hornets To Death

Bees Work Together In Order To Roast Predatory Hornets To Death

Anybody who has ever sustained a bee sting knows first hand that bees are not defenseless insects. It is hard to imagine any insect getting the best of a bee. Not only are bees relatively clever for insects, but they are also well equipped with defense capabilities. Bees are often predators to insects, and not the other way around. However, if there was only one type of insect that could be a threat to bees, it would definitely be another stinging insect, such as wasps or yellow jackets. Hornets pose a serious threat to bees, as they also possess a stinger that deals out a toxin that is more painful to humans that a bee sting. Sometimes hornets will succeed at killing a bee. However, bees have a secret to killing hornets, and it involves cooking them alive in a high heat environment. This may be hard to believe, but when a bee, or several bees feel threatened by a menacing hornet, they can band together in order to generate heat that reaches deadly temperatures.

Most of the time when bees feel threatened they can use their handy stingers as a method of attack or defense. However, a bee’s stinger is ineffective when combating hornets, as hornes possess a hard exoskeleton that cannot be penetrated by a bee’s stinger. Luckily bees can work together in order to outwit hornets in times when defense against the insects becomes necessary. When under threat from a hornet, Japanese honey bees will hover in the air in a formation that resembles a sphere. The bees then use their vibrating flight muscles to generate heat. The rapid flapping quickly heats up the center of the spherical bee formation to one hundred and sixteen degrees fahrenheit, which is hot enough to kill the threatening hornet. This defensive behavior was only discovered by researchers as recently as 2005. The defensive and spherical formations are referred to by experts as “bee balls”.

Do you think that this eusocial behavior is more advanced than any eusocial defensive behavior exhibited by termites?

 

 

How Did Killer Bees Wind Up In America?

How Did Killer Bees Wind Up In America?

We have all heard the term “killer bees” before, but are there really killer bees in the United States? Are killer bees native to America? Killer bees are also referred to as Africanized honey bees or A.m. scutellata. These bees are a subspecies of western honey bees. Western honey bees are officially known as Apis mellifera Linnaeus. Technically honey bees originate from the continent of Africa, but a multitude of different bee species have been introduced to Europe and the Americas. Due to the economic importance of bees as pollinators and producers of honey, Africanized honey bees have been spread all over the world, including the US.

Initially only honey bees that were common in Europe were moved to America for economic purposes. However, in the tropical South American climate, European honey bees did not survive for long. In an effort to breed honey bees in Brazil Warwick Kerr, a Brazilian scientist, imported Africanized honey bees into Brazil from South Africa. Kerr noticed that the Africanized honey bees were relatively aggressive, so he attempted breed more behaviorally gentle bees. Unfortunately, many of these Africanized honey bees escaped from his lab in Brazil before Kerr could start breeding the bees to be less aggressive. Ever since then, Africanized honey bees have mated with many different types of bees. Originally Africanized honey bees were known simply as “African” honey bees. But after several bee populations mated with the African bees, each population became “Africanized.” Today experts use the terms interchangeably. The descendents of the Africanized bee population that escaped Kerr’s lab rapidly moved through Central America and into Mexico and then America. Experts claim that the invasive bees traveled up to three hundred miles per year. This makes Africanized honey bees one of the most biologically successful invasive insects known to man.

Do you know how to spot an Africanized honey bee?

 

 

Leafcutting Bees That Grow Up Fast Cause Serious Problems For Beekeepers

Leafcutting Bees That Grow Up Fast Cause Serious Problems For Beekeepers

Leaf Cutting Bee

We humans know that receiving the proper nutrients during childhood is necessary for a healthy development. But what about an insect’s development? Does an insect’s physiology demand a certain amount of nutrients for proper development? A recent study on bees has determined that nutrient intake can determine how quickly alfalfa leafcutting bees reach adulthood. Some bees grow rapidly as long as they have access to a variety of nutrients. Other bees can stop developing for a period of time if they are not provided with enough nutrients. However, both types of bees are genetically similar. It turns out that nutrient intake can determine growth rates in bees by altering the bees genetic expression during the larval stage. Professional beekeepers prefer bees that experience a period of suspended development over bees that grow rapidly. This dormant stage is known as “diapause.” Bees that reach maturity without diapause often cause beekeepers a number of problems.

A bees genetic makeup, coupled with its nutrient intake while in the larval stage, will determine whether or not a particular bee larva will experience diapause. Some environmental factors, in this case nutrient intake, will determine how certain genes are expressed. Environmental factors, and the effect these factors have on gene expression, is a phenomenon that is known as “phenotypic plasticity.”

Although bees are genetically similar during the earliest stages of development, the amount of nutrition that they receive determines how their genes are expressed. This gene expression then determines whether or not a bee will enter into diapause. During this pause in development, the prepupa will lie dormant during the winter, and then hatch and reproduce during the following spring.

This study is of interest to beekeepers because bee larvae that experience diapause are more easily managed than bees that hatch and reproduce during the same season. This is because the non-diapausing bees often disturb the still dormant bee larvae by eating through the cell where the dormant bee larvae are contained. This disturbance usually results in the death of the diapausing bees. The disturbance that the non-diapausing bees cause within the nest can also result in the growth of a disease spreading fungus.

Bees that experience diapause are also preferred by farmers because the once latent bees can begin pollinating at the start of the spring season, and continue until they die. The faster growing bees, on the other hand, reach adulthood too late in the season. Therefore these bees cannot pollinate nearly as many plants as their diapuasing counterparts. Since leafcutting bees are bred for their commercial value, bees that experience diapause during the larval stage increase profits for agricultural companies.

Do you know of any other insects that can experience diapause at some point during their development?

 

 

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