When a Shark Is More Than a Shark: A Sociopolitical Problem-Solving Approach to Fisher-Shark Interactions

“Shark is the man!”: ethnoknowledge of Brazil’s South Bahia fishermen regarding shark behaviors

BACKGROUND Fishermen's knowledge is a source of indispensable information in decision-making processes related to efforts to stimulate the management and conservation of fishing resources, especially in developing countries. This study analyzed the knowledge of fishermen from three municipal areas of Bahia in northeast Brazil regarding the behavior repertoire of sharks and the possible influenc...

Shark Immunoglobulin Light Chains

The humoral adaptive immune system of sharks is partly based on the same H2L2 heterodimeric antibody structure seen in all jawed vertebrates (reviewed in Flajnik 2002). The constituent vertebrate immunoglobulin (Ig) heavy (H) and light (L) chains provide obligate defense against pathogens and their toxins via neutralization, opsonization, and activation of the classical pathway of the complemen...

Cases of Shark-Bite

Evolution: How a Barnacle Came to Parasitise a Shark

A new study on a parasitic barnacle that lives on a deep sea shark found that its closest living relatives are rocky shore barnacles. The findings provide insight into barnacle phylogeny and raise new questions about the evolution of parasitism.

Predominance of genetic monogamy by females in a hammerhead shark, Sphyrna tiburo: implications for shark conservation.

There is growing interest in the mating systems of sharks and their relatives (Class Chondrichthyes) because these ancient fishes occupy a key position in vertebrate phylogeny and are increasingly in need of conservation due to widespread overexploitation. Based on precious few genetic and field observational studies, current speculation is that polyandrous mating strategies and multiple patern...