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Evidence of Philopatry in Sharks and Implications for the Management of Shark Fisheries
Evidence of philopatric behavior in diverse species of sharks is accumulating through various sources of data, including studies of shark behavior, genetics and fisheries. If sharks display natural
Estimation of short-term centers of activity from an array of omnidirectional hydrophones and its use in studying animal movements
TLDR
The utility of the method was assessed using data from a study of neonate blacktip sharks, with results equivalent to a short-term center of activity rather than a precise estimate of location at a single time.
Serological Changes Associated with Gill-Net Capture and Restraint in Three Species of Sharks
TLDR
When correlated with the relative degree of capture effects, there were significant intraspecific changes in the concentration of potassium, lactate, inorganic phosphate, uric acid, alkaline phosphatase, aspartate aminotransferase, total and ionized calcium, and gluc...
Analysis of the bite force and mechanical design of the feeding mechanism of the durophagous horn shark Heterodontus francisci
SUMMARY Three-dimensional static equilibrium analysis of the forces generated by the jaw musculature of the horn shark Heterodontus francisci was used to theoretically estimate the maximum force
Population genetic structure of Earth's largest fish, the whale shark (Rhincodon typus)
TLDR
The absence of population structure across the Indian and Pacific basins indicates that oceanic expanses and land barriers in Southeast Asia are not impediments to whale shark dispersal and provides a compelling argument for development of broad international approaches for management and conservation of Earth's largest fish.
Serum steroid hormones and the reproductive cycle of the female bonnethead shark, Sphyrna tiburo.
TLDR
This study is the first to demonstrate a sustained rise in progesterone during gestation in a placental shark and suggests a regulatory role for this hormone during the period prior to implantation of the embryos in the uterus.
Diet, feeding habits, and diel feeding chronology of the bonnethead shark, Sphyrna tiburo, in southwest Florida
TLDR
Results suggest that S. tiburo is a specialist that undergoes dietary shifts depending on season and habitat, and the shortcomings of the most commonly used approach and the limited value of considering only stomach contents weight to investigate diel feeding chronology are revealed.
Adaptations for spatial vision in sharks
TLDR
The physiological optics of the eye have been modeled with a schematic eye for the lemon shark, the first such model for an elasmobranch species and reveal a prominent visual streak, a functional specialization that is correlated with the lemon Shark's visual behavior and habitat.
Spatial and temporal variation in shark communities of the lower Florida Keys and evidence for historical population declines
TLDR
Individual species differed in their responsiveness to variation in water temperatures and habitat, suggesting that fishing methods should be considered explicitly in studies describing shark communities or temporal trends in abundance.
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