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Teaching Life Cycles of Humpback Whales

Humpback Life Cycles

 

Humpback whales are amongst the most fascinating marine mammals. Their annual migration up and down Queensland’s coast provides a fantastic learning opportunity for regional students. This blog offers educators valuable information about humpback whale life cycles, habitats, and threats, along with engaging discussion points and activities that can be brought to life with a trip to the coast to view the spectacle that is the annual humpback migration.

Ocean Life Education can support curriculum learning by hosting a humpback whale themed incursion or coastal excursion or event during the Queensland annual whale watching season (June-Oct), focusing on crucial aspects of the humpback whale life cycle and tailor-making the program to your needs.

Humpback migration map Australia

The Journey from Antarctica to Queensland

Each year, around 20,000 humpback whales embark on one of the longest migrations of any species. They cover around 10,000 kilometres from the Antarctica to the warm water of Queensland further north. This journey occurs between May and November, and is vital for the survival of their species, ensuring a safe environment for calving and nurturing young during the crucial first stage of their life cycle.

Great Barrier ReefWhy Do Humpback Whales Choose Queensland’s Warm Waters?

Northern Queensland and The Great Barrier Reef provide the perfect conditions (see Habitats Program) for humpback whale mothers and their calves. Unlike the food-rich waters of Antarctica, the tropical waters offer safety from predators like orcas and warmth for the less insulated calves – that haven’t yet developed sufficient blubber for cold temperatures.

Humpback whales also mate during this time in warmer waters.

Humpback whale life cycle resource

 

As mammals, humpback whales give birth to live young after an 11-month pregnancy.

When born, a calf is about four to five metres long and weighs nearly a tonne! The mother immediately helps it to the surface for its first breath and begins nursing it with nutrient-rich fatty milk, which helps it grow rapidly.

Early Development

The relationship between a mother and her calf is crucial for its survival. Mothers protect their calves and teach them essential skills, such as swimming – mimicking the mother, breathing, and using vocalisations to communicate.

A calf drinks a staggering 600 litres of milk daily, enabling it to gain strength and blubber quickly in order to survive the journey back south to the icy cold waters of Antarctica.

After several months in Queensland’s waters, mother and calf begin their long journey back to Antarctica. This phase is challenging for the young whale, as it must adapt to colder temperatures and start learning how to find food on its own. By the time they reach Antarctica, the calf is much stronger and more independent.

Reproduction & Maturity

Humpback whales reach reproductive age after around 5-10 years. Once mature, they then mate during the long journey north.

Humpback whales live until they are about 50 years old, when they complete the humpback whale life cycle.

Teaching Opportunities in the Classroom

Humpback Whale Life CyclesEducators can integrate humpback whale life cycles, humpback whale migration, and marine conservation into science, geography, and environmental studies. Here are some ideas for classroom activities:

  1. Mapping the Migration – Have students trace the migration route and identify key locations such as The Antarctic, Hervey Bay, and the Great Barrier Reef. Check out our Humpback Whale Migration Calender.
  1. Whale-Watching Research – Book an Ocean Life Education hosted excursion to explore local whale-watching opportunities along the Queensland coast and discuss conservation efforts as outlined in our Human Impact Incursions.
  1. Creative Writing – Ask students to write a diary entry from the perspective of a migrating whale calf. Our Ocean Literacy incursions can set you up perfectly for this.
  1. Marine Animal Comparisons – Compare humpback whales with other marine animals, focusing on reproduction and survival strategies. Ocean Life Education’s interactive marine displays offer the perfect opportunity to compare with a diverse range of marine species, including fish and turtles.
  1. Environmental Awareness – Discuss threats such as climate change, shark nets, plastic pollution, and ship strikes, and brainstorm ways to help protect marine life. Ocean Life Education’s Human Impact Program, The Earth Under Threat, develops an understanding of the issues and how students can take responsibility for conservation.

Observing Whales in the Wild

From June to October, teachers and students can witness the magnificent sight of humpback whales along the Queensland coast. Observing their playful behaviours, such as breaching and tail-slapping, provides an exciting way to connect learning with real-world experiences. Check out our whale watching guide to find out more.

Conclusion

Humpback whales are a vital part of Australia’s marine ecosystem, and their migration offers a compelling educational topic. By teaching students about these magnificent creatures, educators can foster a love for marine conservation and inspire future generations to protect our oceans. 

By integrating humpback whale life cycles, humpback whale migration, and Great Barrier Reef whale conservation into your lessons, you can provide students with valuable knowledge about marine life and the importance of protecting these incredible creatures.

Having the annual humpback migration passing by our coastline each year is an invaluable opportunity for children to appreciate these magnificent creatures in the wild. What a wonderful place East Coast Australia is to live! 

 

About Ocean Life EducationJaide Cambourne Ocean Life Education

Our oceans are full of the most incredible biodiversity, from plankton to enormous whales, all playing a crucial role in maintaining the health of our planet. Ocean Life Education’s aim is to  raise awareness about the delicate balance of marine ecosystems and the threats they face today.

We bring the ocean to life with our mobile incursions, engaging excusions, and events across South East Queensland! Visiting early learning centers, schools, and other settings, we deliver interactive, curriculum-based programs featuring live marine animals and live marine displays.

Our diverse team of live marine animals includes a baby shark, freshwater turtle, sea stars, sea cucumbers and sea urchins.

Resources and Further Reading 

Whale Resources and online courses 

For more information about what we do, check out Ocean Life Education.

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Life Cycles of Ocean Animals for Schools

Marine animals have diverse life cycles depending on their species and ecological niche. Here are some common life cycle patterns observed in marine animals:

Oviparous

Producing young by means of eggs which are hatched after they have been laid by the parent.

Many marine animals lay eggs that hatch then undergo a series of developmental stages before transforming into adults. For example, sea turtles lay eggs on beaches, and the hatchlings make their way to the sea where they undergo a pelagic (open ocean) stage before maturing into adults.

Learn more about turtle life cycles with our free resources

Viviparous

Give birth to live young.

These species nourish their developing embryos internally and give birth to fully formed offspring. Marine mammals such as shark life cycles whales, dolphins, and seals exhibit this type of life cycle. The majority of sharks give birth to live young too.

Learn more about vivaparous sharks and shark life cycles

Metamorphosis

Change of physical form, structure, or substance.

Some marine invertebrates, such as sea urchins, sea stars, and certain types of crustaceans, undergo metamorphosis. They start their lives as larvae, which go through a radical transformation to become adults.

Learn more about metamorphosis in sea urchins and sea stars

Complex Life Cycles

Many marine invertebrates, like corals and certain types of worms, have complex life cycles involving multiple stages and forms. They may have larval stages that float in the water column before settling on a substrate and metamorphosing into adults.

When coral polyps are sexually mature and their cells produce gametes (egg and/or sperm). The gametes are fertilized and produce a zygote which creates new cells and eventually forms a new coral polyp.

Planktonic Life

Numerous marine organisms, including various types of zooplankton and phytoplankton, have life cycles that occur entirely within the water column. These organisms often have free-floating larval stages that drift with ocean currents until they develop into adult forms.

Learn more about the open ocean habitat

Life cycles can vary greatly among different marine animal species. Factors such as reproduction, development, feeding habits, and habitat requirements influence the particular life cycle patterns observed in each species.

 

Example Life Cycles of marine animals

Turtles

Turtles have an intriguing life cycle that involves various stages of development and unique behaviors. Here is an overview of turtle life cycle the life cycle of turtles:

  1. Nesting and Egg Laying: Female turtles return to land, usually the same beach where they were born, to lay their eggs. They dig a hole in the sand using their hind flippers and deposit a clutch of eggs. The number of eggs in a clutch depends on the turtle species, ranging from a few to over a hundred. Once the eggs are laid, the female covers the nest with sand and returns to the sea.
  2. Incubation: The eggs are left buried in the warm sand to incubate. The temperature plays a vital role in determining the sex of the hatchlings. Warmer temperatures typically produce females, while cooler temperatures result in males. The incubation period can vary depending on the species and environmental conditions but generally ranges from several weeks to a few months.
  3. Hatching: When the time is right, the hatchlings begin to emerge from the nest. Using their egg tooth, a small pointed structure on their snout, they break open the eggshell. Hatchlings often emerge together in a group, which provides some protection against predators. It’s estimated that only 1 in 1,000 hatchlings will survive to adulthood.
  4. Journey to the Sea: Once they hatch, the tiny turtles instinctively crawl towards the brightest light, which is typically the reflection of the moon on the ocean’s surface. This natural instinct helps guide them towards the water. They may face various challenges on their way, such as avoiding predators and navigating obstacles.
  5. Pelagic Stage: After reaching the water, the hatchlings enter what is known as the pelagic (open ocean) stage. During this period, they spend much of their time floating and swimming in the open ocean, away from coastal areas. This stage can last for several years, depending on the turtle species.
  6. Growth and Development: As the hatchlings continue their journey through the pelagic stage, they undergo significant growth and development. They feed on a diet consisting mainly of plankton, small organisms, and jellyfish, depending on their species.
  7. Juvenile Stage: After the pelagic stage, the turtles begin to transition into the juvenile stage. At this point, they leave the open ocean and migrate to coastal areas, such as estuaries and nearshore habitats such as coral reef. Here, they find shelter, food, and suitable environments to grow and mature.
  8. Maturation: The turtles continue to grow and mature over several years or even decades, depending on the species. The time it takes for turtles to reach sexual maturity varies widely among species, ranging from a few years to several decades.
  9. Reproduction: Once turtles reach sexual maturity, they return to the nesting grounds, often the same beach where they were born, to lay their own eggs. This completes the life cycle, as they repeat the process of nesting and egg laying.

 

The life cycle can vary among different turtle species. Each species has its own unique behaviors, migration patterns, and habitat preferences. Environmental factors, such as temperature, habitat availability, and human activities, can also influence the success and survival of turtle populations throughout their life cycle.

 

Teaching Marine Life Cycles

Our curriculum based Primary Programs give students the opportunity to observe live marine animals such as sea stars, sea urchins and sharks. This brings the learning experience to life.

Please check out our Primary Programs for more information.