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  • 1
    Electronic Resource
    Electronic Resource
    GROWTH LAYERS IN TEETH FROM KNOWN-AGE, FREE-RANGING BOTTLENOSE DOLPHINS (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 5 (1989), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Growth layers were examined in teeth collected from free-ranging bottlenose dolphins, Tursiops truncatus, from Florida that have been part of a long-term study begun in 1970; 26 of the dolphins were of known or approximately known age, and 19 were of minimum known age. A second tooth was extracted from 6 animals for examination of growth that had taken place in the interval following the initial extraction. The teeth were read for age estimates without knowledge of any data pertaining to the animals. Most of the estimated ages were the same as or close to the known and approximately known ages of the animals, ranging from 2 to 16 yr. We conclude that the structures we define as dentinal growth layer groups (GLGs) are annual, we describe sources of error in age estimates, and we provide a description of the GLG pattern that can be used by others to estimate age for dolphins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1989.tb00346.x
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  • 2
    Electronic Resource
    Electronic Resource
    BEHAVIORAL OBSERVATIONS OF THE DWARF SPERM WHALE, KOGIA SIMUS (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 3 (1987), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1987.tb00322.x
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  • 3
    Electronic Resource
    Electronic Resource
    DIEL PATTERNS IN AGGREGATIONS OF PELAGIC DOLPHINS AND TUNAS IN THE EASTERN PACIFIC (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 14 (1998), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Data collected by scientific technicians aboard tuna purse seiners in the eastern Pacific Ocean since the early 1970s have allowed us to study the biology and herd dynamics of pelagic dolphins. A pattern of increasing group size in the morning and subsequent decline in the late afternoon or night was evident for spotted, spinner, and common dolphins, as well as for large yellowfin tuna that associate with dolphins. Diel patterns were also apparent in the formation of mixed-species herds of spotted and spinner dolphins and tuna-dolphin aggregations. Different patterns, however, were displayed by bottlenose dolphins and by yellowfin and skipjack tunas that did not associate with dolphins. It appears that these diel patterns are produced by an interaction of predation pressure and prey distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1998.tb00735.x
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  • 4
    Electronic Resource
    Electronic Resource
    SATELLITE-MONITORED MOVEMENTS AND DIVE BEHAVIOR OF A BOTTLENOSE DOLPHIN (TURSIOPS TRUNCATUS) IN TAMPA BAY, FLORIDA (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 11 (1995), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An adult, female bottlenose dolphin (Tursiops trucncatus) was radio tagged and monitored via satellite-based Argos receivers for 25 d from 28 June to 23 July 1990, in Tampa Bay, Florida. A total of 794 transmissions were obtained during 106 satellite passes. A mean of 3.9 (SE = 0.24) locations/day were determined by Service Argos and showed the animal remained in the bay, usually close to the southeastern shore. The dolphin moved at least 581 km at a minimum mean speed of 1.2 (SE = 0.1) km/h. Data from 63, 922 dives were recorded. The animal spent an average of 87.1 (SE = 0.6)% of the time submerged, with a mean dive duration of 25.8 (SE = 0.5) sec. Mean dive duration differed significantly between four periods of the day, as did the mean percent of time spent submerged. During the early morning the animal spent more time at the surface, averaged shorter dives, and was submerged less than other times of day. This is the first study to demonstrate die1 dive cycles in a bottlenose dolphin. Four months after tag loss, the dolphin was photographed with no evidence of necrosis or disfigurement of the dorsal fin. Satellite telemetry was demonstrated as an effective means of documenting the movements and dive behavior of a small inshore cetacean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1995.tb00669.x
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  • 5
    Electronic Resource
    Electronic Resource
    SPOTTED DOLPHIN EVASIVE RESPONSE IN RELATION TO FISHING EFFORT (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 21 (2005), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Spotted dolphins in the eastern Pacific Ocean associate with yellowfin tuna. During the chase and encirclement phases of purse-seining for tunas, dolphin attempt to evade encirclement with the purse-seine net. We used data on evasive behavior (1982–2001) and numbers of purse-seine sets (1959–2001) to study the relationship between evasion and fishing effort. Results show that in nearshore areas first exploited by the fishery in the early 1960s, dolphins exhibited high evasion, but with a limited correlation between evasion and cumulative effort. In areas farther offshore next exploited in the mid-to late-1960s, dolphins showed high evasion and a significant correlation between evasion and cumulative effort. Dolphins in far-western and southern areas, first exploited in the late 1960s to early 1970s, exhibited low evasion, with little relationship to cumulative effort. We hypothesize that this spatial pattern is the result of two types of pressure from fishing: early effort in nearshore areas with a high risk of mortality that generated a lasting evasive response, followed by a longer period of even greater effort but with lower risk of mortality that generated evasion by longer-term learning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.2005.tb01205.x
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  • 6
    Electronic Resource
    Electronic Resource
    SEASONAL INCIDENCE OF BOAT STRIKES ON BOTTLENOSE DOLPHINS NEAR SARASOTA, FLORIDA (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 13 (1997), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1997.tb00654.x
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  • 7
    Electronic Resource
    Electronic Resource
    X-ray photoelectron diffraction studies of zinc selenide (1983)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 5 (1983), S. 28-32 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Polar and azimuthal angle-resolved XPS studies of ZnSe layers grown epitaxially on {100} GaAs by H2 transport of the elements are described. Comparison of the polar X-ray photoelectron diffraction (XPD) patterns obtained for rotation about [110] and [110] axes confirms the dominant influence of structural factors in determining the shape of the patterns. Azimuthal XPD patterns are shown to reflect symmetry properties directly related to the emitting sites, and their use to determine the symmetry of an exposed single-crystal surface is demonstrated. The outermost ∼100 Å of all the ‘as-grown’ ZnSe layers were ∼20-35% Zn rich. Ar ion bombardment (800 eV, ∼5 μA) rapidly restored the surface stoichiometry to within 10% of 1:1. The disorder concurrently introduced resulted in XPS peak broadening without impairment of the polar XPD pattern. Annealing at 300°C in high vacuum removed the disorder without affecting either the stoichiometry or the XPD pattern. It is inferred that split-〈100〉 interstitials are the preferred sites both for atoms displaced by ion bombardment and for the excess Zn initially present.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740050107
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  • 8
    Electronic Resource
    Electronic Resource
    Sex difference in signature whistle production of free-ranging bottlenose dolphins, Tursiops truncatus (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 171-177 
    Details
    ISSN: 1432-0762
    Keywords: Key words Bottlenose dolphin ; Signature whistle ; Sex difference
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Signature whistles of 42 free-ranging bottlenose dolphin calves were compared to those of their mothers. Humans judged their similarity by inspection of spectrograms. There was a sex difference in the tendency of calves to produce whistles similar to or different from those of their mothers; most female calves produced whistles that were different from those of their mothers, whereas male calves were more likely to produce whistles that were similar to those of their mothers. Because matrilineally related females associate together and use signature whistles to establish and/or maintain contact with their calves, there may be a selective pressure for females to produce whistles that are distinct from those of their mothers. There may be fewer constraints governing whistle development in males, with the result that some males produce whistles similar to those of their mothers and others do not.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650050137
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  • 9
    Electronic Resource
    Electronic Resource
    Signature whistles of free-ranging bottlenose dolphins Tursiops truncatus: stability and mother-offspring comparisons (1990)
    Springer
    Behavioral ecology and sociobiology 26 (1990), S. 247-260 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Mother-calf whistle exchanges were recorded from temporarily captured free-ranging bottlenose dolphins from 1975 to 1989. This is part of a long-term research project studying social structure and behavior of a community of approximately 100 dolphins in waters near Sarasota, Florida. Analysis of whistle exchanges from 12 mothercalf pairs shows that signature whistles can remain stable for periods up to at least 12 years. We looked for effects of vocal learning on the development of the signature whistle by comparing whistles of calves to those of their mothers. Eight female calves produced whistles distinct from those of their mothers, while four male calves produced whistles similar to those of their mothers. Male calves appeared to produce a greater proportion of whistles other than the signature whistle (termed “variants”). We hypothesize that these sex differences in whistle vocalizations may reflect differences in the roles males and females play in the social structure of the community.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178318
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  • 10
    Electronic Resource
    Electronic Resource
    Sex difference in signature whistle production of free-ranging bottlenose dolphins, Tursiops truncates (1995)
    Springer
    Behavioral ecology and sociobiology 36 (1995), S. 171-177 
    Details
    ISSN: 1432-0762
    Keywords: Bottlenose dophin ; Signature whistle ; Sex difference
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Signature whistles of 42 free-ranging bottle-nose dophin calves were compared to those of their mothers. Humans judged their similarity by inspection of spectrograms. There was a sex difference in the tendency of calves to produce whistles similar to or different from those of their mothers; most female calves produced whistles that were different from those of their mothers, whereas male calves were more likely to produce whistles that were similar to those of their mothers. Because matrilineally related females associate together and use signature whistles to establish and/or maintain contact with their calves, there may be a selective pressure for females to produce whistles that are distinct from those of their mothers. There may be fewer constraints governing whistle development in males, with the result that some males produce whistles similar to those of their mothers and others do not.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00177793
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