Spermatozoa depend on their motility to accomplish their function of fertili¬ zation. In the case of sea-urchins and other marine organisms, the ionic com¬ position of sea-water is among the environmental factors that affect motility and longevity (Bishop, 1962). We have started studies of specific ion concen¬ tration changes in the sea-water as they affect the motility of sea-urchin spermatozo...

The knowledge about environmental sensitivity of the marine regions to radionuclide release can be used for the development of response strategies and improvement of design-maker systems. The present results are based on the consequences analysis after potential Russian submarine accident involving a modern vessel. The radioecological consequences are based on modelling of potential releases of...

Methanolic and chloroform-methanol extracts of 25 identified species of marine fauna have been screened for a wide range of biological activities. Of these, 2 extracts exhibited diuretic activity, while antibacterial, antiviral, oxytocic and spasmolytic activities, were observed in 1 extract each.

In sexually reproducing organisms, conflicts of interest among family members are inevitable. The intensity of these conflicts depends upon the opportunities for parents and offspring to interact and the level of promiscuity. Despite the acknowledged role of family conflict in the evolutionary ecology of terrestrial organisms, its influence in the marine realm has largely been ignored. Neverthe...

This Article is brought to you for free and open access by the Center for Coastal Physical Oceanography at ODU Digital Commons. It has been accepted for inclusion in CCPO Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Di Lorenzo, Emanuele; Mountain, David; Batchelder, Harold; Bond, Nicholas; an...

Jesper H. Andersen*, Karsten Dahl, Cordula Göke, Martin Hartvig, Ciarán Murray, Anna Rindorf, Henrik Skov, Morten Vinther and Samuli Korpinen 1 NIVA Denmark Water Research, Copenhagen, Denmark 2 Marine Research Center, Finnish Environment Institute (SYKE), Helsinki, Finland 3 Department of Bioscience, Aarhus University, Roskilde, Denmark 4 DTU Aqua, Section for Marine Ecosystem-Based Management...

Light-stick is a light attractor used in longline fishing which is often dumped or lost into the ocean after used, becoming a potential pollutant to marine organisms. In the present study, toxicity was evaluated by exposing Artemia to light-stick contents. The effects were observed on the survival of nauplii and hatchability of cysts. The LC50 was 0.063mLL−1 after 24h of exposure, whilst hatcha...

Defining the scale of connectivity, or exchange, among marine populations and determining the factors driving this exchange are pivotal to our understanding of the population dynamics, genetic structure, and biogeography of many coastal species. Using a high-resolution biophysical model for the Caribbean region, we report that typical larval dispersal distances of ecologically relevant magnitud...

In contrast with speciation in terrestrial organisms, marine plankton frequently display gradual morphological change without lineage division (e.g., phyletic gradualism or gradual evolution), which has raised the possibility that a different mode of evolution dominates within pelagic environments. Here, we reexamine a classic case of putative gradual evolution within the Globorotalia plesiotum...