Contamination of the aquatic environment and living things with pollutants is increasing daily. Among these pollutants, heavy metals come to forefront regarding toxicological public health due their widespread use, toxicity, resistance degradation, as well accumulation biomagnification in food chain. The study aimed determine essential (Cr, Cu, Fe, Mn, Ni, Zn) non-essential (As, Al, Cd, Pb) met...

Based on light and electron microscopical studies, a new nematode parasite, Echinocephalus inserratus sp. n. (Spirurida: Gnathostomatidae), is described from the spiral valve of broad cowtail stingray Pastinachus ater (Macleay) (Dasyatidae, Myliobatiformes) off New Caledonia. The species morphologically biometrically most similar to overstreeti Deardorff et Ko, 1983, differing it mainly in abse...

In August 1999 and 2000, four suction-cup-attached time–depth recorders (TDRs) were deployed and retrieved from narwhals (Monodon monoceros) in Tremblay Sound, Baffin Island, and Creswell Bay, Somerset Island, Nunavut, Canada. The TDRs remained on the whales for between 12 and 33 h and collected 64.5 h of dive data. Mean dive depths ranged from 20.8 m (SD = 14.8 m) to 50.8 m (SD = 43.8 m) and m...

The origin and maintenance of intraspecific variation in vocal signals is important for population divergence and speciation. Where vocalizations are transmitted by vertical cultural inheritance, similarity will reflect co-ancestry, and thus vocal divergence should reflect genetic structure. Horseshoe bats are characterized by echolocation calls dominated by a constant frequency component that ...

We present far-infrared, submillimetre, and millimetre observations of bright IRAS sources and outflows that are associated with massive CS clumps in the Monoceros OB1 Dark Cloud. Individual star-forming cores are identified within each clump. We show that combining submillimetre maps, obtained with SCUBA on the JCMT, with HIRES-processed and modelled IRAS data is a powerful technique that can ...

Rapid changes in sea ice cover associated with global warming are poised to have marked impacts on polarmarinemammals.Here we examine skeletalmuscle characteristics supporting swimming and diving in one polar species, the narwhal, and use these attributes to further document this cetacean’s vulnerability to unpredictable sea ice conditions and changing ecosystems. We found that extreme morpholo...

Deep diving air-breathing species by necessity must balance submergence time and level of exercise during breath-holding: a low activity preserves oxygen stores allows longer duration whereas high levels consume quickly shorten time. In this study, we combined high-resolution multi sensor animal-borne tag data to investigate behavior locomotion styles the narwhal (Monodon monoceros) ( n = 13, m...