Large–Scale Movement and Reef Fidelity of Grey Reef Sharks

Written by Rod Dawson et al. on March 10, 2010 – 8:00 am -

Despite an Indo-Pacific wide distribution, the movement patterns of grey reef sharks (Carcharhinus amblyrhynchos) and fidelity to individual reef platforms has gone largely unstudied. Their wide distribution implies that some individuals have dispersed throughout tropical waters of the Indo-Pacific, but data on large-scale movements do not exist. We present data from nine C. amblyrhynchos monitored within the Great Barrier Reef and Coral Sea off the coast of Australia. Shark presence and movements were monitored via an array of acoustic receivers for a period of six months in 2008. During the course of this monitoring few individuals showed fidelity to an individual reef suggesting that current protective areas have limited utility for this species. One individual undertook a large-scale movement (134 km) between the Coral Sea and Great Barrier Reef, providing the first evidence of direct linkage of C. amblyrhynchos populations between these two regions. Results indicate limited reef fidelity and evidence of large-scale movements within northern Australian waters.


Posted in Medical news | Comments Off

Decreased NK Cell FcRγ in HIV-1 Infected Individuals Receiving Combination Antiretroviral Therapy: a Cross Sectional Study

March 10, 2010 – 8:00 am

Background FcRγ is an immunoreceptor tyrosine-based activation motif (ITAM)-signalling protein essential ...

Comments Off

Pathogenic Polyglutamine Tracts Are Potent Inducers of Spontaneous Sup35 and Rnq1 Amyloidogenesis

March 10, 2010 – 8:00 am

The glutamine/asparagine (Q/N)-rich yeast prion protein Sup35 has a low ...

Comments Off

Characterization of the Activation of Protein Tyrosine Phosphatase, Receptor-Type, Z Polypeptide 1 (PTPRZ1) by Hypoxia Inducible Factor-2 Alpha

March 10, 2010 – 8:00 am

Background Hypoxia inducible factors (HIFs) are the principal means by which ...

Comments Off

Discovery of Novel MicroRNAs in Female Reproductive Tract Using Next Generation Sequencing

March 10, 2010 – 8:00 am

MicroRNAs (miRNAs) are small non-coding RNAs that mediate post-transcriptional gene ...

Comments Off

Human Mammary Epithelial Cells Exhibit a Bimodal Correlated Random Walk Pattern

March 10, 2010 – 8:00 am

Background Organisms, at scales ranging from unicellular to mammals, have been ...

Comments Off

Category and Perceptual Learning in Subjects with Treated Wilson’s Disease

March 10, 2010 – 8:00 am

To explore the relationship between category and perceptual learning, we ...

Comments Off

Intracellular Calcium Spikes in Rat Suprachiasmatic Nucleus Neurons Induced by BAPTA-Based Calcium Dyes

March 10, 2010 – 8:00 am

Background Circadian rhythms in spontaneous action potential (AP) firing frequencies and ...

Comments Off

The RGD Domain of Human Osteopontin Promotes Tumor Growth and Metastasis through Activation of Survival Pathways

March 10, 2010 – 8:00 am

Background Human osteopontin (OPN), a known tumor associated protein, exists in ...

Comments Off

Localization of Canine Brachycephaly Using an Across Breed Mapping Approach

March 10, 2010 – 8:00 am

The domestic dog, Canis familiaris, exhibits profound phenotypic diversity and ...

Comments Off