Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae
Commercial over exploitation resulted in the depletion of the North Pacific population of humpback whales. A major component of this population winters in Hawaiian waters, where reproductive activities occur. There are no apparent identifiable trends in the status of this population. This may be due...
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ftdtic:ADA218328 2023-05-15T16:35:54+02:00 Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae Nitta, Eugene T. Naughton, John J. NATIONAL MARINE FISHERIES SERVICE HONOLULU HI 1989-11 text/html http://www.dtic.mil/docs/citations/ADA218328 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA218328 en eng http://www.dtic.mil/docs/citations/ADA218328 Approved for public release; distribution is unlimited. DTIC AND NTIS Biology *VERTEBRATES *INVERTEBRATES *WHALES COASTAL REGIONS ENVIRONMENTS OCEAN SURFACE TRAFFIC HUMANS WATER INSHORE AREAS SUBSTRATES POPULATION REGIONS ENVIRONMENTAL IMPACT PROFILES WINTER SURVEYS PATTERNS LIFE CYCLES PACIFIC OCEAN HABITATS SURFACE TEMPERATURE HAWAII NORTH PACIFIC OCEAN REPRODUCTION(PHYSIOLOGY) SHALLOW DEPTH TEMPERATURE BREEDING REQUIREMENTS MEASUREMENT *SPECIES PROFILES HUMPBACK WHALE MEGAPTERA NOVAEANGLIAE Text 1989 ftdtic 2016-02-23T02:29:44Z Commercial over exploitation resulted in the depletion of the North Pacific population of humpback whales. A major component of this population winters in Hawaiian waters, where reproductive activities occur. There are no apparent identifiable trends in the status of this population. This may be due to inconsistent survey effort, the imprecision of survey techniques that are unable to detect small changes, no measurable trend, or one or any combination of these factors. During the winter breeding season, humpback whales are found within the 100-fathom isobath and shallower waters around the main Hawaiian Islands. Cow-calf pairs, in particular, demonstrate an affinity for waters of less than 50 fathoms. It appears that size, depth, and substrate of shallow bank areas are important elements in the distribution of humpback whales on their wintering grounds. The sea-surface temperature in Hawaiian waters ranges from 23.2 to 24.2 C during the winter breeding season and is at the low range of water temperatures in comparison with breeding areas in other parts of the world. The major environmental impact facing humpback whales in Hawaiian waters is the loss and modification of shallow nearshore habitat to harbor, resort, and other coastal development, and the subsequent increase in human activity including vessel traffic, which may result in disturbance and displacement of humpback whales from preferred habitat. Keywords: Environmental requirements; Hawaii, Humpback whale; Life cycles. Text Humpback Whale Megaptera novaeangliae Defense Technical Information Center: DTIC Technical Reports database Pacific |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Biology *VERTEBRATES *INVERTEBRATES *WHALES COASTAL REGIONS ENVIRONMENTS OCEAN SURFACE TRAFFIC HUMANS WATER INSHORE AREAS SUBSTRATES POPULATION REGIONS ENVIRONMENTAL IMPACT PROFILES WINTER SURVEYS PATTERNS LIFE CYCLES PACIFIC OCEAN HABITATS SURFACE TEMPERATURE HAWAII NORTH PACIFIC OCEAN REPRODUCTION(PHYSIOLOGY) SHALLOW DEPTH TEMPERATURE BREEDING REQUIREMENTS MEASUREMENT *SPECIES PROFILES HUMPBACK WHALE MEGAPTERA NOVAEANGLIAE |
spellingShingle |
Biology *VERTEBRATES *INVERTEBRATES *WHALES COASTAL REGIONS ENVIRONMENTS OCEAN SURFACE TRAFFIC HUMANS WATER INSHORE AREAS SUBSTRATES POPULATION REGIONS ENVIRONMENTAL IMPACT PROFILES WINTER SURVEYS PATTERNS LIFE CYCLES PACIFIC OCEAN HABITATS SURFACE TEMPERATURE HAWAII NORTH PACIFIC OCEAN REPRODUCTION(PHYSIOLOGY) SHALLOW DEPTH TEMPERATURE BREEDING REQUIREMENTS MEASUREMENT *SPECIES PROFILES HUMPBACK WHALE MEGAPTERA NOVAEANGLIAE Nitta, Eugene T. Naughton, John J. Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
topic_facet |
Biology *VERTEBRATES *INVERTEBRATES *WHALES COASTAL REGIONS ENVIRONMENTS OCEAN SURFACE TRAFFIC HUMANS WATER INSHORE AREAS SUBSTRATES POPULATION REGIONS ENVIRONMENTAL IMPACT PROFILES WINTER SURVEYS PATTERNS LIFE CYCLES PACIFIC OCEAN HABITATS SURFACE TEMPERATURE HAWAII NORTH PACIFIC OCEAN REPRODUCTION(PHYSIOLOGY) SHALLOW DEPTH TEMPERATURE BREEDING REQUIREMENTS MEASUREMENT *SPECIES PROFILES HUMPBACK WHALE MEGAPTERA NOVAEANGLIAE |
description |
Commercial over exploitation resulted in the depletion of the North Pacific population of humpback whales. A major component of this population winters in Hawaiian waters, where reproductive activities occur. There are no apparent identifiable trends in the status of this population. This may be due to inconsistent survey effort, the imprecision of survey techniques that are unable to detect small changes, no measurable trend, or one or any combination of these factors. During the winter breeding season, humpback whales are found within the 100-fathom isobath and shallower waters around the main Hawaiian Islands. Cow-calf pairs, in particular, demonstrate an affinity for waters of less than 50 fathoms. It appears that size, depth, and substrate of shallow bank areas are important elements in the distribution of humpback whales on their wintering grounds. The sea-surface temperature in Hawaiian waters ranges from 23.2 to 24.2 C during the winter breeding season and is at the low range of water temperatures in comparison with breeding areas in other parts of the world. The major environmental impact facing humpback whales in Hawaiian waters is the loss and modification of shallow nearshore habitat to harbor, resort, and other coastal development, and the subsequent increase in human activity including vessel traffic, which may result in disturbance and displacement of humpback whales from preferred habitat. Keywords: Environmental requirements; Hawaii, Humpback whale; Life cycles. |
author2 |
NATIONAL MARINE FISHERIES SERVICE HONOLULU HI |
format |
Text |
author |
Nitta, Eugene T. Naughton, John J. |
author_facet |
Nitta, Eugene T. Naughton, John J. |
author_sort |
Nitta, Eugene T. |
title |
Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
title_short |
Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
title_full |
Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
title_fullStr |
Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
title_full_unstemmed |
Species Profiles: Life Histories and Environmental Requirements of Coastal Vertebrates and Invertebrates Pacific Ocean Region. Report 2. Humpback Whale, Megaptera novaeangliae |
title_sort |
species profiles: life histories and environmental requirements of coastal vertebrates and invertebrates pacific ocean region. report 2. humpback whale, megaptera novaeangliae |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA218328 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA218328 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Humpback Whale Megaptera novaeangliae |
genre_facet |
Humpback Whale Megaptera novaeangliae |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA218328 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766026207353110528 |