North Atlantic Right Whales (IMAGE) NOAA Fisheries West Coast Region Caption The declining body size of North Atlantic right whales may have critical consequences for the future of the species because smaller females produce fewer calves, new research shows. Aerial photos from the study show that the whales’ body size is related to the number of calves they produce. Credit Michael Moore and Carolyn Miller, under NMFS permit #21371 Usage Restrictions Credit Michael Moore and Carolyn Miller, under NMFS permit #21371 License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.