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Rapid worldwide depletion of predatory fish communities
The analysis suggests that management based on recent data alone may be misleading, and provides minimum estimates for unexploited communities, which could serve as the 'missing baseline' needed for future restoration efforts.
Maximum reproductive rate of fish at low population sizes
It is found that the number of spawners produced per spawner each year at low populations and the maximum annual reproductive rate is relatively constant within species and that there is relatively little variation among species.
Collapse and Conservation of Shark Populations in the Northwest Atlantic
- J. Baum, R. Myers, D. Kehler, B. Worm, S. Harley, Penny A. Doherty
- Environmental ScienceScience
- 17 January 2003
Open-area models highlight priority areas for shark conservation, and the need to consider effort reallocation and site selection if marine reserves are to benefit multiple threatened species.
ROBUST STATE-SPACE MODELING OF ANIMAL MOVEMENT DATA
It is shown how known information regarding error distributions can be used to improve inference of the underlying process(es) and demonstrated that the frame- work provides a powerful and flexible method for fitting different behavioral models to tracking data.
Loss of Large Predatory Sharks from the Mediterranean Sea
- F. Ferretti, R. Myers, F. Serena, H. Lotze
- Environmental ScienceConservation biology : the journal of the Society…
- 1 August 2008
This study reconstructs long-term population trends of large predatory sharks in the northwestern Mediterranean Sea to suggest that current levels of exploitation put large sharks at risk of extinction in the Mediterranean Sea.
Compensatory density dependence in fish populations: importance, controversy, understanding and prognosis
This work advocates an approach to compensation that involves process-level understanding of the underlying mechanisms, life-history theory, careful analysis of field data, and matrix and individual-based modelling.
Cascading Effects of the Loss of Apex Predatory Sharks from a Coastal Ocean
Impacts of chronic overfishing are evident in population depletions worldwide, yet indirect ecosystem effects induced by predator removal from oceanic food webs remain unpredictable. As abundances of…
Identifying leatherback turtle foraging behaviour from satellite telemetry using a switching state-space model
A switching state-space model (SSSM) for discerning different movement behaviours hidden within error-prone satellite telemetry data is presented and it is shown that while transiting, leatherbacks make longer, deeper dives; and while foraging, they encounter cooler waters that range from 13 to 22°C.
SHIFTS IN OPEN‐OCEAN FISH COMMUNITIES COINCIDING WITH THE COMMENCEMENT OF COMMERCIAL FISHING
We identify changes in the pelagic fish community of the tropical Pacific Ocean by comparing recent data collected by observers on longline fishing vessels with data from a 1950s scientific survey…
META-ANALYSIS OF COD-SHRIMP INTERACTIONS REVEALS TOP-DOWN CONTROL IN OCEANIC FOOD WEBS
The results show that changes in predator populations can have strong effects on prey populations in oceanic food webs, and that the strength of these interactions may be sensitive to changes in mean ocean temperature.