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2 edition of Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas found in the catalog.

Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas

Kelly Ann Rossbach

Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas

by Kelly Ann Rossbach

  • 253 Want to read
  • 15 Currently reading

Published .
Written in English

    Subjects:
  • Atlantic bottlenosed dolphin -- Behavior -- Bahamas -- Grand Bahama.

  • Edition Notes

    Statementby Kelly Ann Rossbach.
    The Physical Object
    Pagination121 leaves, bound :
    Number of Pages121
    ID Numbers
    Open LibraryOL15526572M

      Bottlenose dolphins showed an increased group size from inshore to offshore waters, in agreement with the findings of Defran and Weller () for Southern California. The bottlenose dolphin (genus Tursiops) is one of the most well-known species of dolphin. There appear to be two main varieties; a smaller, inshore form and a larger, more robust form that lives mainly offshore. This stocky species has a torpedo-shaped body, a short beak and pointed flippers. They are usually dark grey on the back with paler grey flanks and a white or pinkish belly. The.

      The dolphin pods we typically see on Amelia River Cruises are inshore groups. Inshore groups are typically around 10 dolphins in size, with offshore groups upwards of These groups are constantly changing. When a new offshore group goes by, dolphins switch out at .   Different ecotypes of bottlenose dolphins have been recognized worldwide, often showing inshore and offshore types, and inshore types .

    Male bottlenose dolphins reach sexual maturity at between 8 and 13 years of age; Female bottlenose dolphins reach sexual maturity at between five and ten years of age; Gestation lasts about 12 months and the female may bear young into her 40s. Births may occur in all seasons, but typically peaks occur during spring, early summer and fall.   Bottlenose dolphins spent longer time in the waters in front of Portofino promontory when visiting the whole monitored zone, both inshore and offshore (Fig 5). Resident rate of dolphins resulted strongly influenced also by SST with the highest resident rate at .


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Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas by Kelly Ann Rossbach Download PDF EPUB FB2

Consequently, bottlenose dolphins are subdivided into small discrete coastal groups residing relatively close to shore and a much larger wide-ranging offshore population.

The relationships both within and between those coastal and offshore populations remain unclear (Rosel and others, ; Toth and others, ; Richards and others,   Offshore bottlenose dolphins in our study showed a typical type of damage at the tip of the dorsal fin that was rarely recorded in the inshore community.

Markings on the dorsal fin result from interactions with conspecifics [ 50 ], predators or prey [ 51 ] and human activities including boat strikes, fishing gear or propeller wounds [ 52, 53 ].Cited by: Little is known about the behavior of offshore dolphin populations.

Our purpose was to distinguish and describe stable social groups of bottlenose dolphins (Tursiops truncatus) between inshore and offshore West End, Grand Bahama Island (26°42'N, 79°00'W).Photoidentification was conducted from May to September, to Cited by: Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas ().

Bottlenose dolphin Tursiops truncatus and other toothed cetaceans. Pages The role of long-term study in understanding the social structure of a bottlenose dolphin community. From our decades of research, we have been able to define the boundaries of several resident dolphin communities.

Different dolphin communities have been identified to the north, to the south, and offshore of the Sarasota community, as well as in other areas. Within each community is the home range, which defines where an individual dolphin moves. Because of their exposure in marine parks, movies, and television as well as their presence in tropical and warm-temperature waters around the world, bottlenose dolphins are among the most familiar of marine mammals.

Since they are relatively easy to obtain and they thrive in captivity, these dolphins have been used in a great variety of studies.

The offshore community comprised one or more distinct groups, found significantly further offshore (>4 km) than the inshore animals. In addition, dorsal fin scarring patterns differed significantly between inshore and offshore communities with individuals of the offshore community having more distinctly marked dorsal fins.

Common bottlenose dolphins are the most familiar dolphins due to the wide exposure they receive in captivity in marine parks and dolphinaria, and in movies and television programs. The common bottlenose dolphin is the largest species of the beaked dolphins. They inhabit temperate and tropical oceans throughout the world, and are absent only from polar waters.

and 25 individuals of an inshore community occurring in north­central Chile is a reliable criterion to visually distinguish between bottlenose dolphin ecotypes in this region. of offshore. The occurrence and foraging activity of bottlenose dolphins and harbour porpoises in Cardigan Bay SAC, Wales.

by did not distinguish between bottlenose dolphins and harbour porpoises, and so it was MW in Ð inshore Mwnt MW out Ð offshore Mwnt NQ f Ð New Quay fish factory NQ r Ð New Quay reef YN Ð Ynys Lochtyn. Dolphins mostly travel (%) and travel-dive (%), with offshore dolphins socialising more (%) than coastal.

There were low re-sighting rates for both coastal and offshore dolphins. Distinguishing inshore and offshore communities of bottlenose dolphins (Tursiops truncatus) near Grand Bahama Island, Bahamas Public Deposited.

Bottlenose dolphins are cosmopolitan in distribution, and demonstrate a great deal of geographical variation in morphology, with a general drawing in Fig. truncatus is found in most of the world’s warm temperate to tropical seas, in coastal as well as offshore waters (Fig.

2).They are recognizable by their generalized appearance—a medium-size, robust body, a moderately falcate dorsal. Bottlenose dolphins, the genus Tursiops, are the most common members of the family Delphinidae, the family of oceanic dolphin. Molecular studies show the genus contains three species: the common bottlenose dolphin (Tursiops truncatus), the Indo-Pacific bottlenose dolphin (Tursiops aduncus), and the Burrunan dolphin (Tursiops australis).Bottlenose dolphins inhabit warm and temperate seas.

Subdivided stocks. The National Marine Fisheries Service, or NMFS, the federal agency responsible for conserving most marine mammals in U.S.

waters, recognizes 16 overlapping stocks of bottlenose dolphins between New York and southern Florida (S.A. Hayes et al ).Six, the oceanic stocks, occur primarily or exclusively in ocean waters, while 10 others are confined largely to specific inshore. Novem Title: Distinguishing Inshore and Offshore Communities of Bottlenose Dolphins (Tursiops truncatus) near Grand Bahama Island.

Bahamas. Abstract approved: Bruce R. Mate. Little is known about the behavior of offshore dolphin populations. The. purpose of. this study was to distinguish stable social groups of bottlenose.

Inshore and Offshore Bottlenose Dolphin (Tursiops truncatus) Communities Distinguished by Association Patterns, near Grand Bahama Island, Bahamas.

Canadian J. Zoology, Download This Article. Stable isotopes appear to be a powerful means of distinguishing among groups of dolphins along an inshore-offshore gradient.

This technique will be applied to the remainder of the bottlenose dolphin osteological collection at Mote Marine Laboratory, to determine if stranded animals originated in inshore vs. coastal vs. offshore waters. Coastal bottlenose dolphins measured off Sarasota, Florida average to m ( to ft.) and weigh between and kg ( to lbs.).

Large bottlenose dolphins in the Pacific may be m (12 ft.) and weigh kg (1, lbs.). In the Mediterranean, bottlenose dolphins can grow to m (12 ft.) or more. Body Shape.

Bottlenose dolphins (Tursiops truncatus) are found in most temperate and tropical waters around the world, including coastal waters of all continents, around most oceanic islands and atolls, and over shallow offshore banks and shoals (Reynolds et al. ; Rice ; Wells and Scott ).Although they are common in coastal and pelagic waters, the majority of research on this species has been.

Book • Edited by: 6 - Distinction between Northwest Atlantic Offshore and Coastal Bottlenose Dolphins Based on Hemoglobin Profile and Morphometry. Select 14 - Aspects of the Behavioral Ecology of Inshore Dolphins Tursiops truncatus and Sousa chinensis in Moreton Bay, Australia.This dolphin has an unusually short and stubby beak, hence the name "bottlenose".

The bottlenose dolphin has more flexibility in its neck than other oceanic dolphins. As adults they are typically six to twelve feet long, and live both inshore and offshore along temperate and tropical coasts worldwide. Dolphins breathe air at the surface of the.Subdivided stocks.

The National Marine Fisheries Service, or NMFS, the federal agency responsible for conserving most marine mammals in U.S. waters, recognizes 16 overlapping stocks of bottlenose dolphins between New York and southern Florida (S.A.

Hayes et al ).Six, the oceanic stocks, occur primarily or exclusively in ocean waters, while 10 others are confined largely to specific inshore.