Sea and freshwater turtle welfare during nesting and hatching involves multiple human-caused threats. Conservation interventions that protect nesting beaches and hatchery practices directly improve individual welfare outcomes.
Turtle nesting welfare encompasses a sequence of events — site selection, incubation, hatching, and hatchling emergence — each of which is affected by human activity. Artificial lighting is perhaps the most pervasive welfare threat: female sea turtles avoid lit beaches for nesting, concentrating nesting effort on fewer sites; hatchlings emerging and following light toward the sea instead orient toward coastal lighting, crawling inland where they die of dehydration, exhaustion, or vehicle strikes. The experience of a hatchling that travels the wrong direction, exhausting its yolk reserves on a beach with no sea, represents genuine welfare harm. Climate-driven incubation temperature changes alter sex ratios in ways that threaten long-term population viability and, for individual eggs incubating in extreme heat, may reduce hatch success and hatchling quality. Lights-out programmes during nesting seasons, light-pollution ordinances, and artificial nest protection are welfare-positive conservation interventions with measurable outcomes.