Reconstruction of pinniped diets: accounting for complete digestion of otoliths and cephalopod beaks

By W. Bowen. 2000

217 citations recorded by the source corpus.

Subfields: Ecology, Ecology, Evolution, Behavior and Systematics, Genetics

View Paper: https://www.semanticscholar.org/paper/4a6abe8d9c99a3347c489f1cc5fd1c4cc5ef51dd

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Citations in the corpus

Stable isotope analysis reveals pelagic foraging by the Southern sea lion in central Chile (2007, methodology): “Yet, the accurate reconstruction of diet using this method is complicated by erosion and differential digestion of hard parts, and also a high proportion of samples with no prey remains (Bowen, 2000; Bowen and Siniff, 1999; Naya et al., 2000).”
Seasonal availability of abundant, energy-rich prey influences the abundance and diet of a marine predator, the Steller sea lion Eumetopias jubatus (2006, background): “Underestimation of prey size, which is influenced by fish species and size (Bowen 2000), may account for differences observed in the size of prey consumed in relation to the available detected during trawl surveys.”
A bioenergetic model for estimating the food requirements of Steller sea lions Eumetopias jubatus in Alaska, USA (2002, background): “First, it is possible that some of the prey species consumed are completely digested and are not present in the scat samples (Bowen 2000).”
Covariation between grey seal (Halichoerus grypus) abundance and natural mortality of cod (Gadus morhua) in the southern Gulf of St. Lawrence (2005, result): “As in most other studies of pinniped diets (e.g., Murie and Lavigne 1985; Croxall 1993; Bowen 2000), estimated diet composition of seals in the Gulf of St. Lawrence is based on the hard body parts found in the digestive tracts and faecal material of seals.”
Regional, temporal and fine-scale spatial variation in Weddell seal diet at four coastal locations in east Antarctica (2003, background): “Severity of digestion varies according to predator species, prey species, meal size, prey size and predator behaviour (Bowen 2000).”
Spring diet of ringed seals (Phoca hispida) from northwestern Spitsbergen, Norway (2007, background): “Otolith digestion can also be affected by prey species and size, meal size and composition, and predator behaviour (Marcus et al., 1998; Bowen, 2000; Christiansen et al., 2005).”
Understanding the diet composition of marine mammals: grey seals (Halichoerus grypus) in the Baltic Sea (2010, background): “The remains of different prey species are influenced by digestive erosion to differing extents, and if this fact is not taken into consideration, the estimates of both prey size and prey species composition may be biased (Jobling and Breiby, 1986; Harvey, 1989; Tollit et al., 1997; Bowen, 2000; Chri”
Feeding ecology of phocid seals and some walrus in the Alaskan and Canadian Arctic as determined by stomach contents and stable isotope analysis (2006, background): “analysis of stomach contents or scats of marine mammals is strongly biased and overestimates prey with chitinous structures (e.g., crustaceans, cephalopod beaks) and fish otoliths that resist digestion or are retained in the stomach, and underestimates soft prey such as snails and mussels that are d”
DIETARY ANALYSIS FROM FECAL SAMPLES: HOW MANY SCATS ARE ENOUGH? (2005, background): “…the identification and quantification of identifiable parts that have passed through the digestive systems of mammals (e.g., Arim and Naya 2003; Bowen 2000; Ciucci et al. 1996; Corbett 1989; Dellinger and Trillmich 1988; Harvey 1989; Katona and Altbacker 2002; McInnis et al. 1983; Orr and…”
Methods of estimating marine mammal diets: A review of validation experiments and sources of bias and uncertainty (2012, methodology): “Recovery rates of otoliths from seals held in dry areas during feeding experiments were significantly lower than those provided with the opportunity to swim during the experiment (Harvey 1989, Bowen 2000).”
Otolith science entering the 21st century (2005, background): “Since studies of seal predation on fish rely extensively on otoliths recovered from stomachs, Bowen (2000) experimentally assessed the rate of loss of otoliths as a result of digestion, and then calculated the impact on perceived predation rates.”