Tag Archives: Ecology

Raising Trout in Science Class

During the month of March, lower school students are learning about the fragile lifecycle of fish through their participation in a program called Trout in the Classroom.

Trout in the Classroom is a community-based program which allows students to experience first hand the delicate balance needed for animals to survive in aquatic ecosystems. Using eggs provided by a hatchery, classes set-up and maintain an aquarium for the purpose of observing the development of fish from the eyed-egg stage until they become young fry. Students engage in a course of study which supports the learning experience across curriculum area. This program is run cooperatively by local schools, fishing clubs and government agencies.

Objectives:

-Provide a positive learning program for classrooms on the value of aquatic ecosystems through the hatching and release of trout.

-Help students learn about their local watershed and how human activities affect the quality of water in local streams, lakes and the bay.

The 49 healthy trout eggs (seen in the photo above) were received on March 6 and will hatch in the coming weeks. Once hatched, the fish will have their pure spring water changed twice a week, with a carefully monitored feeding schedule. Throughout the process students will see firsthand the various life stages of the trout as they move from embryonic, to hatching, to larval, to becoming juveniles.

On April 10, students will go to Lake Merced in San Francisco to release the trout.

To learn more about this program, please visit: https://www.wildlife.ca.gov/CAEP/R3

Citizen Science at Mountain Lake

On Monday, Grade 6 students had their first visit of the school year to Mountain Lake in San Francisco.

The Hamlin School is situated within the urban confines of San Francisco. However, every year students have the opportunity to spend intensive days studying nature, collecting data, and participating in ongoing research work.

This hands on encounter with ecology takes place at Mountain Lake, a natural 1,700-year-old freshwater pond. “The area around Mountain Lake is home to 250 species of birds, 30 species of butterflies, 50 species of mammals, and more federally protected species than any other national park in the continental United States.” Spanish explorers who went on to settle San Francisco spent their first night camped by the lake in 1776.

In more recent years it was discovered that the entire lake was polluted. This was caused by dirty water run off from a nearby road, pesticides from the adjacent golf course, and people dumping non-native fish and turtles into the lake. The situation became so dire that the Presidio Trust had to kill all the fish in the lake with 50 gallons of rotenone, an odorless, colorless, poison. Once the water quality was restored, the Presidio Trust reintroduced non-invasive species better suited for the Mountain Lake environment.

Through the diligent work of faculty member Rachel Davis, Hamlin has been partnered with the Presidio Trust for a number of years. “The Presidio Trust is an innovative federal agency created to save the Presidio, (once a premier U.S. Army post) and share it with the public as a vibrant national park site.”

Over the years Hamlin students have:

-Collected data on birds for migration patterns

-Collected data on plants in order to look at climate change

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Matter of Trust Speaks at Hamlin

In the spring, Grade 7 students will be participating in a active learning experience called Rise to the Challenge.

Rise to the Challenge is the intensive for our Grade 7 studentsIntensives are a concentrated period of study where an entire grade is working on a project or projects, with profound research and preparation, followed by a public event. These intensives are designed with Hamlin’s mission in mind, as our students meet the challenges of their time.

Grade 7 students have the opportunity to choose their own topics, do in-depth research, then share their findings, providing short and long-term solutions to various problems.

To prepare and inspire our girls for Rise to the Challenge, we have had speakers sharing their altruistic passions with our students.

Yesterday, Lisa Craig Gautier, the founder of the nonprofit A Matter of Trust, spoke with students.

Matter of Trust provides systems for sorting recyclables and compostables into useful stockpiles. By focusing on convenience, we learn what households need most from community reuse programs. Gathering perspectives from global industries, we find motivations and new zero-waste opportunities. We are passionate about efficiency and deconstructable designs.

Ms. Gautier encouraged our students to discover their passion and make a difference in the world by thinking outside the box in creative ways.

Special thanks to Mr. Ditto (in the photo), who invited Ms. Gautier to Hamlin.

To learn more about Matter of Trust, please visit: https://matteroftrust.org/