Pinniped diet composition: a comparison of estimation models.(Statistical Data Included)

From: Fishery Bulletin | Date: July 1, 2002| Author: | Copyright information

Abstract--Along the west coast of the United States, the potential impact of increasing pinniped populations on declining salmonid (Oncorhynchus spp.) stocks has become an issue of concern. Fisheries managers need species-specific estimates of consumption by pinnipeds to evaluate their impact on salmonid stocks. To estimate consumption, we developed a model that estimates diet composition by reconstructing prey biomass from fecal samples. We applied the model to data collected from harbor seals (Phoca vitulina) that are present year-round in the lower Columbia River where ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Dietary Energy Density Determined by Eight Calculation Methods in a Nationally Representative United States Population1
; ABSTRACT Dietary energy density [kcal/g (kJ/g)] influences energy intake...laboratory conditions. Little is known about the energy density of the diets of free-living persons. Because energy density investigations are a relatively new endeavor...
Dietary Energy Density Is Associated with Increased Intake in Free-Living Humans1
; ABSTRACT Dietary energy density markedly influences the daily...study examined the relation of energy density to dietary intake and body size...were analyzed for the relation of energy density to body size and to per-meal...
The role of energy density in the overconsumption of fat
; The Role of Energy Density in the Overconsumption of Fat'2 ABSTRACT In...these macronutrients when the palatability and energy density were similar. On the other hand, the energy density of foods has been demonstrated to have a robust...
Low Energy Density Diets Are Associated with Favorable Nutrient Intake Profile and Adequacy in Free-Living Elderly Men and Women1,2
; ...dietary pattern associated with a low energy density diet and determine its nutrient adequacy...RRR) analysis was used to identify an energy density-associated dietary pattern. A nutrient...the association of diet adequacy with energy density. The RRR-derived factor (dietary ...
Energy density: A new way to look at food
; Energy density is the number of calories in a given...cream, so the lettuce has a lower energy density rating. According to the Mayo Clinic...Source, eating more foods with low energy density will allow you to maintain a healthy...
Energy density: a new way to look at food. (Your Life).(Brief Article)
; Energy density is the number of calories in a given...cream, so the lettuce has a lower energy density rating. According to the Mayo Clinic...HealthSource, eating more foods with low energy density will allow you to maintain a healthy...
Fluctuations in chick diet of the Squacco Heron Ardeola ralloides in southern France: changes over the last 30 years
; ...month and year. Aims To determine the diet composition of chicks and its variations in 2000...months. Major changes were found in the diet composition between the early 1970s and 2000s...differences can be expected in the diet composition of adult and chick Squacco Herons...
Dietary composition of the Mexican spadefoot toad (Spea multiplicata) from a sand dune habitat in southwestern Coahuila, Mexico.
; Abstract. -- Diet composition of the Mexican spadefoot toad...range. This study reports the diet composition of a population inhabiting a...months. However, because the diet composition of this toad varies among localities...
Comparative Diets of Three Populations of an Aquatic Snake (Natrix tessellata, Colubridae) from Mediterranean Streams with Different Hydric Regimes
; ...populations had similar taxonomic diet composition. There was a significant ontogenetic...one study area caused a shift in the diet composition of these snakes, with males and juveniles...Filippi, 2000). Although the general diet composition of this species has already been studied...
Summer feeding relationships of the co-occurring Phoxinus phoxinus and Gobio lozanoi (Cyprinidae) in an Iberian river
; ...investigated in order to analyse their diet composition and interspecific diet overlap. Both...significantly higher for European minnows. The diet composition and the feeding strategy plots revealed...Additionally, comparisons between diet composition and the benthic ...