Species

Rana sierrae

Common Name(s)

Sierra Nevada Yellow-legged Frog

Region where program is based

North America

Country where program is based

United States

The authority that recommended this species for an ex situ program

Conservation Needs Assessment Workshop

Has a genetic analysis been performed on wild populations to define the target taxon, i.e., verify that single, viable Evolutionarily Significant Units (ESU's) that are managed as separate populations, are not confounded by cryptic species or polymorphisms?

Yes

Name of the institution managing the ex situ population

Oakland Zoo

Year the program started

2015

Is at least some portion of the captive population maintained in range country?

Yes

Are sufficient resources available to manage the ex situ population?

Are adequate numbers of skilled staff available with the appropriate ex situ amphibian experience?

Is sufficient space available for the required population size?

Additional Support required

Has a Taxon Management Coordinator for the ex situ population been appointed?

Yes

Taxon Management Coordinator

Isabella Linares of Oakland Zoo

Has a Taxon Management Group or Recovery Team been established?

Has a Taxon Management Plan, Recovery Plan or Species Action Statement been written?

Web link to Taxon Management Plan

Have Husbandry Guidelines been written?

Web link to Husbandry Management Guidelines

Have any knowledge gaps in the species biology or in their interaction with potential threats been identified that could benefit from research using the ex situ population?

Have founder needs been calculated using the AArk Amphibian Population Management Guidelines ?

Have sufficient potential founders been collected? ( AArk Amphibian Population Management Guidelines recommends a minimum of 20 pairs of found animals).

Is the ex situ population managed by nationals from the range country?

Yes

What tools are used to maximize retention of genetic diversity?

Has the population produced viable offspring?

No

Have the first generation captive-bred animals bred successfully?

Not applicable

Is the ex situ population housed in permanent isolation from other populations occurring outside its range?

Is work being supported to study and mitigate threats to the species in the wild, either by the institution or by a regional wildlife agency?

Have captive-bred or captive-reared animals been released into the wild?

Yes

If releases were undertaken, have disease screening protocols or veterinary health checks been conducted prior to releases to the wild?

Yes

Is follow-up work being carried out to monitor progress of the released animals?

Yes

Is the taxon again secure in the wild, even if it might still require some ongoing in situ management? i.e. has the need for a captive assurance population been obviated such that we can call this a successfully terminated captive rescue program?

No

Comments

August 2021: The breeding process begins when tadpoles are collected from the wild. Back at the zoo, the frogs are nurtured and given anti-fungal chytrid treatments to prevent the virus once they are returned to their habitat. The frogs are pit-tagged, which is like micro-chipping a dog or cat, treated again for chytrid and then readied for their flight to the wilderness. 33 frogs released into Sequoia and Kings Canyon national parks will hopefully re-establish a healthy population. The frogs are pit-tagged, which is like micro-chipping a dog or cat, treated again for chytrid and then readied for their flight to the wilderness.