Author: Jean-François GosselinPublisher:
ISBN: 9780660033136
Category :
Languages : en
Pages : 8
Book Description
Monitoring the State of the St. Lawrence River
Author: Jean-François GosselinPublisher:
ISBN: 9780660033136
Category :
Languages : en
Pages : 8
Book Description
St. Lawrence Estuary Beluga Whale
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
It occurs primarily in the SLE and seasonally in the Gulf of St. [...] The significant reduction in abundance in the 20th century was also accompanied by an approximate 65% contraction in the summer range from the 1930s to today. [...] The number of carcasses found "endangered" because of troubling signs of recent declines and cases is recorded and the carcasses are sampled on site or transported to of unexplained mortality in young belugas. [...] Photographic surveys also provide an estimate of the percentage of calves in the population aged 0 Figure 2 Total (open circle) annual reports of dead beluga in the Estuary to 1 year. [...] The as the cause of death for any of the newborns examined, factors that beluga population model did not predict high numbers of newborns can contribute to separation from the mother may be a major cause of that year, and the unusually high number of carcasses found could be calf mortality.
St. Lawrence Beluga Recovery Plan
Author: St. Lawrence Beluga Recovery TeamPublisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 84
Book Description
This document reviews the current state of knowledge about St. Lawrence belugas, recommends a series of actions for ensuring their survival and proposes an implementation schedule. The goal of the Recovery Plan is to bring population numbers and conditions to a state where natural event and human activities will not threaten the survival of the St. Lawrence beluga whale population. A subsidiary goal is to improve the status from endangered to vulnerable, as defined by COSEWIC.
St. Lawrence Estuary beluga whale
Author: Jean-François GosselinMonitoring the State of the St. Lawrence River : Beluga Whale Population of the Estuary
Author: Canada. Environment CanadaPublisher: Sainte-Foy, Québec : St. Lawrence Vision 2000
ISBN: 9780662332503
Category :
Languages : en
Pages : 1
Book Description
St. Lawrence Estuary Beluga Whale
Author: V. LesagePublisher:
ISBN: 9780660385921
Category : Whale populations
Languages : en
Pages :
Book Description
Beluga
Author: Pierre BélandPublisher: Lyons Press
ISBN:
Category : Biography & Autobiography
Languages : en
Pages : 240
Book Description
A very powerful chronicle of the St. Lawrence River Beluga whales which were hunted to near extinction until given legal protection in 1979, and are now quite literally dying from pollution. Beland (senior research scientist, St. Lawrence National institute of Ecotoxicology) describes the Beluga history, how they live now, the pollution threats to them, and ways in which this kind of tragedy can be prevented in the future, although it looks like it's too late for the Beluga; thus the volume also serves as their elegy. Includes color photographs. Annotation copyright by Book News, Inc., Portland, OR
St. Lawrence Estuary Beluga
Author: Abundance and Population Trajectory of St. Lawrence Estuary Beluga
Author: Publisher:
ISBN: 9780660489674
Category : Whale populations
Languages : en
Pages : 0
Book Description
Approaches to Understanding the Cumulative Effects of Stressors on Marine Mammals
Author: National Academies of Sciences, Engineering, and MedicinePublisher: National Academies Press
ISBN: 0309440513
Category : Science
Languages : en
Pages : 147
Book Description
Marine mammals face a large array of stressors, including loss of habitat, chemical and noise pollution, and bycatch in fishing, which alone kills hundreds of thousands of marine mammals per year globally. To discern the factors contributing to population trends, scientists must consider the full complement of threats faced by marine mammals. Once populations or ecosystems are found to be at risk of adverse impacts, it is critical to decide which combination of stressors to reduce to bring the population or ecosystem into a more favorable state. Assessing all stressors facing a marine mammal population also provides the environmental context for evaluating whether an additional activity could threaten it. Approaches to Understanding the Cumulative Effects of Stressors on Marine Mammals builds upon previous reports to assess current methodologies used for evaluating cumulative effects and identify new approaches that could improve these assessments. This review focuses on ways to quantify exposure-related changes in the behavior, health, or body condition of individual marine mammals and makes recommendations for future research initiatives.