Sooty Terns
It has been proposed that sonic booms caused a mass hatching failure of Sooty Terns in the Dry Tortugas in Florida by cracking the eggshells. This paper investigates this possibility analytically, complementing previous empirical studies. The sonic boom is represented as a plane-wave excitation with an N-wave time signature. Two models for the egg are […]
Pelagic Crabs
Swarms of live pelagic red crabs (Pleuroncodes planipes) began appearing in the surf and on beaches at San Nicolas Island (SNI), off southern California, in late December 1982. Although these crustaceans have occurred as far north as Monterey, their distribution is centered off the western coast of Baja California and they occur only rarely in […]
California Gulls
Although the California gull (Lams californicus) is the state bird of Utah, the history and status of colonies nesting at Great Salt Lake have not been well documented. Stansbury (1852) reported gulls nesting in 1850, and the population has been studied sporadically since then. This paper summarizes several population surveys in 1980s. The California Gull was […]
Birds of Socorro Island
In April 1978, a Carnegie Museum of Natural History/Hubbs-Sea World Research Institute expedition visited Socorro and San Benedicto islands, which are located between 370 and 400 km (230-250 miles) south of the tip of Baja California. Our purpose was to determine the status of the endemic birdlife, and to obtain anatomical material and sound recordings, […]
Oystercatchers
Hybrid oystercatcher First sighting of a new hybrid oystercatcher in San Julian, Argentina Publication:Jehl,J.R. Jr. A New Hybrid Oystercatcher from South America, Haematopus Leucopodus X.H. Ater. Condor. 80:344-346. 1978.
Razorbills
We investigated differences in parent—offspring vocal recognition between males and females in a natural population of razorbills Alca torda, a long-lived and highly social species of auk (Family: Alcidae). Razorbills provide biparental care to their chicks while at the nest site, after which the male is the sole caregiver for an additional period at sea. Parent—offspring recognition […]
Mono Lake
National Geographic article on HSWRI research on Wilson’s phalaropes at Mono Lake. During June and July, these birds stop at this desolate inland sea to feed on brine shrimp to fatten up for their nonstop flight to Tierra del Fuego, at the tip of South America. The article ends with the question, if Mono Lake […]
Genetics-Based Study Shows Hatchery Contribution to White Seabass Fishery Significantly Greater Than Previous Estimates
Contact: Peter James MacCracken, APR pjm@strategic-communications.com – (619) 275-4110 GENETICS-BASED STUDY SHOWS HATCHERY CONTRIBUTION TO WHITE SEABASS FISHERY SIGNIFICANTLY GREATER THAN PREVIOUS ESTIMATESOff Southern California and Mexico, 30 to 48 percent of fish samples from OREHP SAN DIEGO (April 25, 2022) – A genetic-marker methodology for identifying the success of fish-stocking efforts was recently applied […]