A5087459428- Turtle Biology and Conservation
- Marine animal studies overview
- Isotope Analysis in Ecology
- Ichthyology and Marine Biology
- Amphibian and Reptile Biology
- Avian ecology and behavior
- Fish Ecology and Management Studies
- Paleontology and Evolutionary Biology
- Animal Vocal Communication and Behavior
- Marine and fisheries research
- Aquatic Invertebrate Ecology and Behavior
- Wildlife Ecology and Conservation
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2015-2025
NOAA National Marine Fisheries Service
2015-2022
The Ocean Foundation
2022
National Health Council
2022
National Academies of Sciences, Engineering, and Medicine
2022
University of California, San Diego
2015-2017
Scripps Institution of Oceanography
2011
Summary Determining location and timing of ontogenetic shifts in the habitat use highly migratory species, along with possible intrapopulation variation these shifts, is essential for understanding mechanisms driving alternate life histories assessing overall population trends. Measuring variations multi‐year habitat‐use patterns especially difficult remote oceanic species. To investigate potential differential among marine vertebrates, we measured naturally occurring stable nitrogen isotope...
The North Pacific Transition Zone (NPTZ) is known as a global marine hotspot for many endangered and commercially significant highly mobile species. In the last few decades, region has undergone unprecedented physical biological transformations in response to climate variability change. Although it anticipated that species will need adapt shift their distributions, current predictions have relied on short-term data sets or modeled simulations. This left critical gap our understanding of...
Among tremendous biodiversity within the California Current Ecosystem (CCE) are gigantic mysticetes (baleen whales) that produce structured sequences of sound described as song. From six years passive acoustic monitoring central CCE we measured seasonal and interannual variations in occurrence blue ( Balaenoptera musculus ), fin physalus humpback Megaptera novaeangliae ) whale Song detection during 11 months year defines its prevalence this foraging habitat potential use behavioral ecology...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 587:217-234 (2018) - DOI: https://doi.org/10.3354/meps12372 Expanding coastal forager paradigm: long-term pelagic habitat use by green turtles Chelonia mydas in eastern Pacific Ocean Calandra N. Turner Tomaszewicz1,2,*, Jeffrey A. Seminoff2, Larisa Avens3, Lisa R. Goshe3, Juan M. Rguez-Baron4,5, S. Hoyt...
Abstract Quantifying demographic parameters and variable vital rates, such as somatic growth time to maturity, reproductive longevity, is important for effective management of threatened endangered populations sea turtles (Cheloniidae). To address these knowledge gaps, we applied skeletochronology analyze compare rates variation in life‐history traits age size at sexual maturity 65 green ( Chelonia mydas ) the eastern Pacific Ocean (EP), along west coast United States; belonged ≥2 nesting...
Rationale The sampling of sequential, annually formed bone growth layers for stable carbon (δ13C values) and nitrogen (δ15N isotope analysis (SIA) can provide a time series foraging ecology data. To date, no standard protocol exists the pre-SIA treatment cortical samples taken from fresh, modern, bones. Methods Based on SIA historical bone, it is assumed that fresh must be pre-treated with acid prior to SIA. Using an elemental analyzer coupled ratio mass spectrometer measure ratios, we...
The ecological application of stable isotope analysis (SIA) relies on taxa- and tissue-specific carbon (Δ13 C) nitrogen (Δ15 N) discrimination factors, determined with captive animals reared known diets for sufficient time to reflect dietary ratios. However, studies often prohibit lethal sampling, are difficult endangered species, conditions not experienced in the wild.We overcame these constraints Δ13 C Δ15 N values skin cortical bone from green sea turtles (Chelonia mydas) that died...
Summary Stable carbon (δ 13 C) and nitrogen 15 N) isotope analysis ( SIA ) has proven useful in addressing fundamental questions ecology such as reconstructing trophic interactions, habitat connections climate regime shifts. The temporal scales over which can be used to address ecological problems vary depending on the protein turnover times of analysed tissue. Hard, inert tissues, teeth, bones mollusc shells, grow regular intervals (i.e. daily or annually), sequential sampling these growth...
To address a major knowledge gap for flatback sea turtles ( Natator depressus ), species endemic to Australia and considered ‘Data Deficient’ IUCN Red List assessment, we present the first-ever skeletochronology-derived age growth rate estimates this species. Using rare collection of bone samples gathered from across northern Australia, applied skeletochronology characterized length-at-age relationship, established baseline rates hatchling adult life stages, produced empirical age-at-...
The North Pacific Loggerhead sea turtle ( Caretta caretta ) undergoes one of the greatest all animal migrations, nesting exclusively in Japan and re-emerging several years later along important foraging grounds eastern Pacific. Yet mechanisms that connect these disparate habitats during what is known as “lost years” have remained poorly understood. Here, we develop a new hypothesis regarding possible physical mechanism for habitat connectivity – an intermittent “thermal corridor” using...
Abstract Green turtles (Chelonia mydas) are among the most high profile species in San Diego Bay, California, and understanding impacts of coastal development industry is essential to management conservation this local population. Here we describe power plant changing energy production its impact on turtle habitat use our ability research manage For over 20 years, green sea have been captured, assessed, tagged near South Bay Power Plant (SBPP) Bay; from 2002–2011, 104 were captured 212...
In the eastern Pacific Ocean, hawksbill sea turtles ( Eretmochelys imbricata ) are adapted to use coastal habitats and ecosystems uncharacteristic of most other turtles. Once considered extirpated from this region, hawksbills had sought refuge in estuaries, nesting on muddy banks among tangles mangrove roots. This population is at high risk bycatch during fishing efforts estuaries (blast fishing) adjacent rocky reefs (gillnets), further impacted by habitat degradation development climate...
Historical and archaeological evidence documents the importation of sea turtles from eastern Pacific Ocean (Baja California) to California during Gold Rush (1848–1855) through end 19th century, but it is unknown whether these century foraged in similar ways their modern counterparts. To identify species two Rush-era turtle specimens recovered deposits San Francisco, California, we first analyze ancient DNA (aDNA). We then carbon (δ13Ccol), nitrogen (δ15N), hydrogen (δD) stable isotopes bone...
Pseudemys is a genus of commonly occurring freshwater turtles with limited growth information across their long lifespans. We used 11,361 mark-recapture events to estimate the somatic rates P. nelsoni, peninsularis, concinna suwanniensis, and texana from springs developed Bayesian model species-specific, site-specific, individual effects on growth. corroborated evidence for fast juvenile slower adult in but found uncommonly rates, doubling or tripling size first year. males had smallest...
Abstract Habitat‐based approaches to animal conservation are bolstered by an understanding of resource selection, that is, use resources (i.e., habitat features) relative their availability in the environment. Quantifying selection is especially valuable when data characterizing space limited, as often case with mobile and/or cryptic species. Documenting associations features can better inform management time, while also revealing key insight into movement ecology and behavior. Here, we...