mammals commonly attack schools of prey fish by entering the school (NORRIS & DOHL, 1980; PITCHER, 1986; MAGURRAN, 1990). Exploitative predators Some avian predators attack schools as individuals; however, many others, particularly seabirds, attack the prey school in large, albeit not coordinated, flocks

In: Netherlands Journal of Zoology

after annexation until the mid-1970s, little offshore biological work was undertaken in the vicinity of the PEI. In 1976, French and South African scientists on board the research vessel MS Marion- Dufresne studied benthos, oceanography, primary productivity, plankton, fish, and seabirds of the PEI

In: Ocean Yearbook Online

, many of the stock harvests must be assessed as unsustainable. Drastically reduced fish harvests over the last 15 years were reported by the United Nations Environment Programme (UNEP).25 Marine Mammal and Seabird Resources Due to its vast extent and rich food chains, many marine mammal and seabird

In: Ocean Yearbook Online

parental effort in this broadly monomorphic seabird. For instance, the delivery of seaweed as a nesting material has been typically consid- ered a male specific trait. We assessed this assumption and determined whether the potential role of this behaviour is to serve as a nuptial trait preceeding

In: Behaviour

Dugan, 2002). Most of the seabirds (Laridae, Pelecanidae, Phalacrocoracidae, Sulidae) showed the highest abundances in the first year of the study. Seabirds generally have a specialized diet, comprising mainly of small pelagic fish ( Grémillet and Boulinier 2009 ; Jaksic and Fariña 2010 ), and could

In: Israel Journal of Ecology and Evolution

dominance test environment, a similar effect upon dominance position was shown. 8. A. J. BEINTEMA (Amsterdam): Geography of the seabirds of Tris- tan da Cunha. The 21 species of seabirds of Tristan da Cunha, in the southern Atlantic at 37° S 12° W, are mainly southern (subantarctic) elements. There is a

In: Netherlands Journal of Zoology

global discards may exceed 10 million tonnes per year. 6 Consequently, while contemporary fisheries are not usually targeting marine mammals, seabirds, and sea turtles, 20 to 38 percent of these species are threatened, many of them because they end up as bycatch in various fisheries. 7 The depletion of

In: The Future of Ocean Governance and Capacity Development

. © Koninklijke Brill NV, Leiden, 2003 Behaviour 140, 925-933 Also available online - 926 DE LEÓN, MÍNGUEZ & BELLIURE Introduction Many seabird species in the family Procellariidae (petrels and shearwaters) are able to home at night, often in complete darkness, Ž nding their nest place among many other such

In: Behaviour

R/V “El Puma” of the “Universidad Nacional Autónoma de México” (UNAM). Sampling depths were estimated with a digital SIMRAD echo sounder. Epibenthic temperature and oxygen concentration were measured ca. 10 m above bottom level with a Seabird CTD-O 2 probe. Oxygen concentrations were also measured

In: Crustaceana

physical and biotic environment of the Antarctic krill (Euphausia superba Dana), south of Africa: some results and a conceptual appraisal of important interactions. Part 4, Krill variability detected from predator studies - J. P. Croxall et al., Reproductive performance of seabirds and seals at South

In: Crustaceana