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Population structure of daytime surface swarms of Nyctiphanes simplex (Crustacea:Euphausiscea) in the Gulf of California, Mexico
Daytime surface swarms of the euphausiid Nyctiphanes simplex were observed during 9 spring seasons between 1984 and 1992 along the east coast of Baja California in the southwest part of the Gulf ofExpand
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An integrated approch to the foraging ecology of marine birds and mammals
Abstract Birds and mammals are important components of pelagic marine ecosystems, but our knowledge of their foraging ecology is limited. We distinguish six distinct types of data that can be used inExpand
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Estimating blue whale skin isotopic incorporation rates and baleen growth rates: Implications for assessing diet and movement patterns in mysticetes
Stable isotope analysis in mysticete skin and baleen plates has been repeatedly used to assess diet and movement patterns. Accurate interpretation of isotope data depends on understanding isotopicExpand
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Acute sun damage and photoprotective responses in whales
Rising levels of ultraviolet radiation (UVR) secondary to ozone depletion are an issue of concern for public health. Skin cancers and intraepidermal dysplasia are increasingly observed in individualsExpand
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Diving behavior of sperm whales in relation to behavior of a major prey species, the jumbo squid, in the Gulf of California, Mexico
Sperm whales occur worldwide and feed largely on meso- and bathypelagic squid, but little is known about the behavioral ecology of this predator and its prey. In the Gulf of California, sperm whalesExpand
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Distribution and relative abundance of sperm whales in relation to key environmental features, squid landings and the distribution of other cetacean species in the Gulf of California, Mexico
Abstract. Sperm whales (Physeter macrocephalus) feed predominantly on meso- and bathypelagic cephalopods for which effective sampling methods have not been developed. The Gulf of California is one ofExpand
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Sperm whales in the Gulf of California: Residency, movements, behavior, and the possible influence of variation in food supply
Sperm whale movements, residency, population structure, and behavior were investigated in the Gulf of California in 1998 and 1999. Variations in sperm whale movement patterns and behavior wereExpand
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A new classification method to simplify blue whale photo-identification technique
ABSTRACT Individual identification of blue whales is based on unique pigmentation patterns. Historically photo-identification has been based on thepigmentation patterns observed on a large portion ofExpand
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Long-term individual sighting history database: an effective tool to monitor satellite tag effects on cetaceans
During the last 3 decades, tagging technology has been used to study different aspects of cetacean ecology. Tags implanted in animal's blubber, muscle and surrounding tissue have produced successfulExpand
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The social organization of sperm whales in the Gulf of California and comparisons with other populations
Intra-specific variation in social organization provides valuable insights into the selective forces driving social evolution. Sperm whales are distributed globally and live far from shore, thusExpand
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