A5026807221- Avian ecology and behavior
- Marine and fisheries research
- Fish Ecology and Management Studies
- Animal Behavior and Reproduction
- Marine animal studies overview
- Species Distribution and Climate Change
- Marine and coastal plant biology
- Wildlife Ecology and Conservation
- Plant and animal studies
- Computational Physics and Python Applications
- Oil Spill Detection and Mitigation
Google (United States)
2021
University of Bristol
2014-2018
Global forage-fish landings are increasing, with potentially grave consequences for marine ecosystems. Predators of forage fish may be influenced by this harvest, but the nature these effects is contentious. Experimental fishery manipulations offer best solution to quantify population-level impacts, rare. We used Bayesian inference examine changes in chick survival, body condition and population growth rate endangered African penguins Spheniscus demersus response 8 years alternating...
Reliable estimates of survival and dispersal are crucial to understanding population dynamics, but for seabirds, in which some individuals spend years away from land, mortality emigration often confounded. Multistate mark–recapture methods reduce bias by incorporating movement into the process estimating survival. We used a multistate model provide unbiased age‐specific probabilities Endangered African Penguin S pheniscus demersus based on 5281 nestlings 31 049 adults flipper‐banded...
Loss of nesting habitat threatens many cavity birds worldwide and has contributed to the decline several species burrow-nesting seabirds. Replacing lost with artificial structures is considered be a useful conservation intervention. Here we report on an investigation into effectiveness such strategy—providing nests for endangered African Penguin (Spheniscus demersus) at colony Robben Island, South Africa. The re-colonisation Island by breeding Penguins in 1980s was partly attributed...
Abstract Following an oil spill from the Treasure off coast of South Africa in June 2000, about 19 000 oiled African Penguins Spheniscus demersus, including 14 825 Robben Island, were caught for rehabilitation and subsequent release. A further 500 penguins that not — mostly birds adult plumage, 7 Island relocated some 700km to east, prevent them becoming oiled. Additionally, 3 350 orphaned chicks, 2 643 collected rearing captivity release wild. Some four years later by end December 2004 70%...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 461:245-255 (2012) - DOI: https://doi.org/10.3354/meps09807 Factors affecting adult survival and inter-colony movement at three South African colonies of Cape gannet Greg Distiller1,*, Res Altwegg2, Robert J. M. Crawford3, Norbert T. W. Klages4, Barbara Barham5 1Department Statistical Sciences, University...
Abstract Colonial breeding is characteristic of seabirds but nesting at high density has both advantages and disadvantages may reduce survival fecundity. African penguins ( Spheniscus demersus ) initiated Robben Island, South Africa in 1983. The population on the island increased late 1990s early 2000s before decreasing rapidly until 2010. Before number peaked, local nest areas where colony was plateaued, suggesting that preferred nests sites were mostly occupied, area used by birds...
In long-lived species, reproductive skipping is a common strategy whereby sexually mature animals skip breeding season, potentially reducing population growth. This may be an adaptive decision to protect survival, or non-adaptive driven by individual-specific constraints. Understanding the presence and drivers of behavior can important for effective management, yet in many species such as endangered African penguin (
AbstractThe Endangered African Penguin Spheniscus demersus is in serious decline, with the total population falling at a rate of ∼5% per annum. The need to carry out regular monitoring collect demographic and phenological data assist planning implementation conservation actions needs be balanced against disturbance that may caused by such monitoring. Many Penguins are now fitted passive integrated transponder (PIT) tags can read remotely ground readers fixed locations colonies. In this...
In long-lived species, reproductive skipping is a common strategy whereby sexually mature animals skip breeding season, potentially reducing population growth. This may be an adaptive decision to protect survival, or non-adaptive driven by individual-specific constraints. Understanding the presence and drivers of this behaviour key effective management, yet in many species such as endangered African penguin (Spheniscus demersus), these factors remain unknown. study uses multistate...