Drones and machine learning help swimmers stay safe from sharks

Funded by the California Ocean Protection Council, SAFS Professor, Corey Garza, and colleagues at Stanford, UC Santa Cruz and the Middlebury Institute have embarked on a project to better understand shark and pinniped behavior off the California coast.

They do this by tagging and tracking the animals, collecting background environmental data through buoys and mapping where pinnipeds gather. The goal is to understand how these variables interact and better predict when and where great white sharks might be on the prowl — and, importantly, how to keep people out of the water when they are.

Read the full story by UW Environment

Sea lions pictured in an aerial shot, sitting on a large rock on the left, and the right image shows the same photo with yellow outlines around the sea lions.
Michael Espriella
Image of California sea lions (left panel), compared to an AI image that counts individuals and classifies them by species.

Conservation challenges of predator recovery

A new article, titled “Conservation challenges of predator recovery”, has been accepted for publication into Conservation Letters: A journal for the Society for Conservation Biology.  This article is a result of the collaboration of SAFS post-doc Kristin Marshall, SMEA Professor Ryan Kelly, NOAA scientist and SAFS affiliate faculty Eric Ward, and NOAA scientists Jameal Samhouri and Adrian Stier.

Abstract

Predators are critical components of ecosystems. Globally, conservation efforts have targeted depleted populations of top predators for legal protection, and in many cases, this protection has helped their recoveries. Where the recovery of individual species is the goal, these efforts can be seen as largely successful. From an ecosystem perspective, however, predator recovery can introduce significant new conservation and legal challenges. We highlight three types of conflicts created by a single-species focus: (1) recovering predator populations that increase competition with humans for the same prey, (2) new tradeoffs that emerge when protected predators consume protected prey, and (3) multiple predator populations that compete for the same limited prey. We use two food webs with parallel conservation challenges, the Northeast Pacific Ocean and the Greater Yellowstone ecosystem, to demonstrate legal/policy conflicts and the policy levers that exist to ameliorate conflicts. In some cases, scientific uncertainty about the ecological interaction hinders progress towards resolving conflicts. In others, available policy options are insufficient. In all cases, management decisions must be made in the face of an unknown future. We suggest a framework that incorporates multispecies science, policy tools, and tradeoff analyses into management.

http://onlinelibrary.wiley.com/doi/10.1111/conl.12186/abstract