Biology and anatomy of Honey bees for Animal Science
- 1. Biology & Anatomy of a Honey Bee Feb 13, 09 • They live together in large, well-organized family groups • Under natural conditions they nest in cavities of trees, caves, your home, etc. • They build multiple ____ in layers hanging vertically with just enough space between the layers for them to move around. Combs are a collection of ____ made of ______ • Cells are used to store _____ and raise ________ • They have one ______ (normally) and live to serve her • They make and store honey to survive the winter Honey Bees are social insects cells bees’ wax combs honey baby bees (brood) queen
- 2. Biology & Anatomy of a Honey Bee Feb 13, 09 Lesson Objectives After successful completion of this lesson you will be able to describe: (don’t worry, there are none of those creepy labs to do) 1. Three members of the colony a) Worker b) Queen c) Drone 2. Development timeline of a Honey Bee and their lifetime functions a) Egg (Eggs) b) Larva (Larvae – “lar-vee” or “lar-vie”) c) Pupa (Pupae – “pew-pee” or “pew-pie”) d) Adult (Adults) e) Job responsibilities 3. Anatomy: Three major sections of the bee and several parts of each a) Head b) Thorax c) Abdomen 14
- 3. Biology & Anatomy of a Honey Bee Feb 13, 09 1) Three members of the colony Worker Queen Drone
- 4. Biology & Anatomy of a Honey Bee Feb 13, 09 1a) The Worker Bee • Female but not fertile a. Normally does not lay eggs b. If she does, they will be drones •About 20,000 to 60,000 in a colony •Has several functions throughout her life •Lives about 4 – 6 weeks in the summer •Lives about 4 – 5 months in the winter •Stinger has barbs and stays in your skin – used to defend the hive and herself
- 5. Biology & Anatomy of a Honey Bee Feb 13, 09 1b) The Queen • One queen (normally) • Function: laying eggs • Can live 2 – 5 years • Can lay 1500 eggs a day at height of season • Produces air-borne pheromones (“queen substance”) that keep the colony functioning orderly, loyal and protective to that queen • Stinger does not have barbs – only uses it to kill rival queens
- 6. Biology & Anatomy of a Honey Bee Feb 13, 09 1c) The Drone • Develops from unfertilized egg • Larger than workers • Big eyes • Male (leads the good life) • Sexually mature at 2 weeks • One function in life – mate with virgin queens • Mates once in drone congregation areas at about 300 feet above ground, then dies (maybe not such a good life) • No stinger (remember, he only has one function) • Survivors are forced out of hive in the Fall and die (definitely not the good life. Maybe if he had another function???)
- 7. Biology & Anatomy of a Honey Bee Feb 13, 09 2) The Life Cycle of Honey Bees
- 8. Biology & Anatomy of a Honey Bee Feb 13, 09 2a) The Birthing Room – Eggs & Larva(e)
- 9. Biology & Anatomy of a Honey Bee Feb 13, 09 2b) The Birthing Room – Larva(e) About to pupate About to be capped
- 10. Biology & Anatomy of a Honey Bee Feb 13, 09 2c) The Birthing Room - Pupa(e) (cell cut-away showing side view)
- 11. Biology & Anatomy of a Honey Bee Feb 13, 09 2c) Drone & Worker Cells Drone – larger & raised cap, usually found at the outer edges of frames. Worker – cap flush with cells
- 12. Biology & Anatomy of a Honey Bee Feb 13, 09 2c) Queen Cells Supersedure Cell Swarm Cell Worker cells are horizontal while queen cells are vertical. As the queen larva grows, the cell enlarges and becomes peanut-shaped when capped for the pupal stage of development.
- 13. Biology & Anatomy of a Honey Bee Feb 13, 09 2d) Adults
- 14. Biology & Anatomy of a Honey Bee Feb 13, 09 2e) Jobs - Never unemployment or a layoff • Workers do the work in the bee society. Employment is based on the age of the bee and the needs of the colony. During their life they pass through many job promotions: • Nurse Bee 1 – 12 days Clean own cell and others Feeding brood (larvae) • House Bee 10 – 20 days old Comb building House keeping Undertaker Ripening honey Climate control Secreting/molding wax into cells Accept and store pollen and nectar from foragers • House Security Guard hive and its entrance (some say only about 5% of bees perform this job) Orientation flights to learn surroundings • Field Agent After about three weeks the girls are ready to spend the rest of their lives as foragers gathering pollen, nectar, tree resin (that they turn into propolis) and water for the hive. During this time they work themselves to death – literally Worker bees in the summer only live about six weeks. In the winter they live a leisurely life for several months (Well, except for those drones) 2
- 15. Biology & Anatomy of a Honey Bee Feb 13, 09 3) Bee Anatomy The three main sections of the Honey Bee’s body: a. Head b. Thorax c. Abdomen Each section contains several items… Insects have a hard outer covering called an exoskeleton, rather than an internal skeleton like vertebrates (humans). The exoskeleton, which is made of a material called chitin, helps to protect the internal organs of the insect and helps prevent desiccation (drying out). In order to grow, the insect must shed the exoskeleton.
- 16. Biology & Anatomy of a Honey Bee Feb 13, 09 •There are three eyes, called ocelli, located at the top of the head between the bee’s two larger compound eyes. The ocelli detect light but can’t focus or arrange an image like the larger compound eyes •Honey Bees use their antennae to learn about their environment: Tiny sensory hairs on each antenna allow them to smell, taste, feel air movements and to communicate with one another •The compound eyes each have almost 7,000 hexagonal facets. Each facet is like a mini-eye, containing its own lens and sensory cells •A bee’s curved, spoon-shaped jaws, called the mandible, are built for many uses: They can be used to ingest food, manipulate wax to build the hive cells, feed the young or queen, and even fight •The long proboscis at the front of the bee’s head is used to ingest liquids such as nectar, honey or water. The proboscis is tipped with a spoon-shaped glossa 3a) Head
- 17. Biology & Anatomy of a Honey Bee Feb 13, 09 3b) Thorax The saliva is mixed with bees wax to make it sticky. The nervous system comprises a small “brain” and 7 ganglia right down the body. The 7th is near the end of the abdomen. This is why the detached body part of the bee sting continues to pump venom. The ganglia control the wings, haemolymph, legs, etc….
- 18. Biology & Anatomy of a Honey Bee Feb 13, 09 3b) Thorax (cont.) The air sacs (think lungs) are connected to the surface by tracheal tubes, emerging near the wings for breathing. (like having nostrils between your shoulder blades) There are also breathing pores (spiracles) along the sides of the abdomen. (refer to the page showing the Dorsal Vessel in the Abdomen section)
- 19. Biology & Anatomy of a Honey Bee Feb 13, 09 3b) Thorax (cont.) There is a total of four wings, two on each side. The forewing and hind wing on each side are joined during flight by a system of hooks (think Velcro). It is the rapid flapping of the wings that causes the distinctive “buzz”. At 15MPH you can’t out-run a Honey Bee.
- 20. Biology & Anatomy of a Honey Bee Feb 13, 09 3b) Thorax (cont.) Like all insects, there are 6 legs. The legs of the bee are primarily used for walking. However, honey bee legs have specialized areas such as the antennae cleaners on the forelegs, and the pollen baskets on the hind legs.
- 21. Biology & Anatomy of a Honey Bee Feb 13, 09 3c) Abdomen Honey Bees have “six-pack” abs. Actually, as seen from the outside, only six abdominal segments can be observed, but the adult honeybee has nine, while the larva has ten.
- 22. Biology & Anatomy of a Honey Bee Feb 13, 09 3c) Abdomen (cont.) Digestion of foods occurs in the mid-gut. The hind-gut reclaims water and nutrients and passes small amounts of indigestible wastes to the rectum for storage until excretion. Honey bees have reversible movement of foods from mouthparts to/from a honey stomach. The honey stomach is a crop or storage area to hold freshly collected nectar or water for transport to/from the nest.
- 23. Biology & Anatomy of a Honey Bee Feb 13, 09 The blood (haemolymph) is not carried by arteries and veins but flows loosely around the body, controlled by the dorsal and ventral diaphragms, sometimes called vessels, bellows or heart. Oxygen enters into the bee via spiracles (including two rows of 6 on the abdomen and by trachea connected by 3 spiracles on the upper thorax) then into the bellows in the abdomen which distribute it into the blood. 3c) Abdomen (cont.) In the spring you will find how much waste can be stored when the girls make their cleansing flights over your nice new, clean bee suit or jacket. (You might want to get the kind with a detachable veil)
- 24. Biology & Anatomy of a Honey Bee Feb 13, 09 3c) Abdomen (cont.) Wax Gland(s): Four pairs of glands, sometimes called mirrors, are specialized parts of the body wall. During the wax forming period in the life of a worker, the glands greatly thicken and take on their glandular structure. The wax is discharged as a liquid, hardens to small flakes or scales, and sits in wax pockets. The wax scale is then transferred to the mandibles where it is chewed into a compact, pliant mass. After the worker bee outgrows the wax forming period, the glands degenerate and become a flat layer of cells.
- 25. Biology & Anatomy of a Honey Bee Feb 13, 09 3c) Abdomen (cont.) Workers have a Nasanoff gland at the end of their abdomen. This Nasanoff gland is used by the guard bees at the hive entrance to disseminate a scent that guides young bees back to the entrance during early flights.
- 26. Biology & Anatomy of a Honey Bee Feb 13, 09 3c) Abdomen (cont.) And finally – the part you’re most interested in... On the end of the female bee's abdomen is the ovipositor (stinger). The ovipositor of the worker bee is barbed so that it remains imbedded into whatever the honeybee stings. In its struggle to free itself, a portion of the bee (stinger, venom sac, ganglia) is left behind, which damages her enough to kill her. The venom sac continues to contract by reflex action, continuously pumping venom into the wound for several seconds. The queen’s ovipositor is slightly barbed and is “reusable”: It’s used to kill rival queens.
- 27. Biology & Anatomy of a Honey Bee Feb 13, 09 Anatomy Review Review 1. Three members of the colony a) Worker b) Queen c) Drone 2. Development timeline of a Honey Bee and their lifetime functions a) Egg (Eggs) b) Larva (Larvae – “lar-vee” or “lar-vie”) c) Pupa (Pupae – “pew-pee” or “pew-pie”) d) Adult (Adults) e) Job responsibilities 3. Anatomy: Three major sections of the bee and several parts of each a) Head b) Thorax c) Abdomen
- 28. Biology & Anatomy of a Honey Bee Feb 13, 09 Final Exam Time Compound eyes Feelers (Antenae) Tongue (Probosis) Fore legs Pollen Sacs Wax Glands Stinger Wings Head Thorax Abdomen
- 29. Biology & Anatomy of a Honey Bee Feb 13, 09 Credits & Reference URLs http://www.rothamsted.ac.uk/pie/DeBug/Anatomy.html http://www.pbs.org/wnet/nature/alienempire/multimedia/bee.html http://maarec.cas.psu.edu/diseasesPests.html http://www.ent.iastate.edu/zoo/lessonplans/honeybee.html http://ag.arizona.edu/pubs/insects/ahb/inf2.html The .pdf files sent to each student http://photo.bees.net/biology/ch5/