Decline of the Sea Turtles Causes and Prevention (1990) / Chapter Skim
Currently Skimming:
B: Interim Report, Committee on Sea Turtle Conservation
B: Interim Report, Committee on Sea Turtle Conservation
Pages 179-192
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From page 179... ...
of the Endangered Species Act Amendments of 1988 (ESAA) , is pleased to provide this interim report on the Kemp's ridley sea turtle.
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From page 180... ...
on the basis of population figures appearing in many scientific publications (NOAA, 19851. Since 1947, when the first nesting Kemp's ridley turtles were discovered on a remote beach near Rancho Nuevo, Tamaulipas, Mexico, many data on the life history and population status of the species have been collected.
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From page 181... ...
However, because most adult females typically nest annually, and since the species concentrates almost all its reproductive effort on the single beach at Rancho Nuevo, nesting females are easier to count than those of other sea turtle species. Because tagging studies have shown that some females might nest as many as three times each season (Marquez M
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From page 182... ...
Archival photographs, probably from 1968, show many hundreds of nesting females on the beach. Overall, from 1947 to 1970, sizes of the largest arribadas on the Rancho Nuevo beach have dramatically declined (Figure 11.
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From page 183... ...
The effects of natural predation (e.g., increased 1 In 1988, Hurricane Gilbert reportedly rearranged the historical nesting beach at Rancho Nuevo. Some nesting turtles were located in 1989 approximately 25 km north of the Rancho Nuevo beach survey camp, an area not patrolled from the ground in previous years.
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From page 184... ...
Number of nesting females at Rancho Nuevo, estimated from numbers of nests found. The linear regression line has a slope of -14.25 and is significant (p< .05)
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From page 185... ...
Specifically regarding Kemp's ridleys, for many years the primary source of tag returns from females nesting at Rancho Nuevo (84% of 129 returns) was the accidental capture of turtles and subsequent reporting of tag numbers by helpful shrimpers (Pritchard and Marquez M., 1973; Marquez M., 19891.
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From page 186... ...
. Based on a comparison with 1966-67, the results of these beach efforts clearly show that protective measures at the nesting beach have improved recruitment at the hatchling level in the population.
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From page 187... ...
. Conclusions The Kemp's ridley sea turtle, nesting almost exclusively on a single Mexican beach near Rancho Nuevo, is restricted largely to the northern and southern Gulf of Mexico and the Atlantic seaboard of the United States.
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From page 188... ...
NOAA Technical Memorandum National Oceanic and Atmospheric Administraton/National Marine Fisheries Service, Southeast Fisheries Center.
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From page 189... ...
National Oceanic and Atmospheric Administration/National Marine Fisheries Service, Southeast Fisheries Center. Coastal Resources Division (in press)
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From page 190... ...
John Bailar, McGill University School of Medicine, Montreal, Quebec Lawrence W Barnthouse, Oak Ridge National Laboratory, Oak Ridge, Tennessee David Bates, University of British Columbia, Vancouver, British Columbia Joanna Burger, Rutgers University, Piscataway, New Jersey Yorman Cohen, University of California, Los Angeles, California John L
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From page 191... ...
Glenn Sipes, University of Arizona, Tucson, Arizona Staff James,J. Reisa, Acting Director Karen Hulebak, Program Director for Exposure Assessment and Risk Reduction David Policansky, Program Director for Applied Ecology and Natural Resources Richard Thomas, Program Director for Human Toxicology and Risk Assessment BOARD ON BIOLOGY Francisco,,.
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From page 192... ...
Remington, University of Iowa, Iowa City Paul G Risser, University of New Mexico, Albuquerque Richard Sallow, Brookhaven National Laboratory, Upton, New York Torsten N
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