population

Study Links at-risk Orcas’ Failed Pregnancies to Scarce Food
Study Links at-risk Orcas’ Failed Pregnancies to Scarce Food
SEATTLE (AP) — The endangered killer whales that frequent the inland waters of Washington state are having pregnancy problems because they can't find enough to eat. That's according to a new study by researchers who analyzed hormones in excrement collected at sea and found more than two-thirds of orca pregnancies failed over a seven-year period...