NMML Harbor Porpoise Vessel, SE Alaska, Spring 1992

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元數據RTF文字檔	下載在 English 中 (12 KB)

說明

Original provider: National Marine Mammal Laboratory Dataset credits: National Marine Mammal Laboratory Abstract: In spring 1992, Southeast Alaska, the south side of the Alaskan Peninsula, and the Kodiak Archipelago were surveyed for harbor porpoise (Phocoena phocoena) from the NOAA John N. Cobb using line transect methodology. The shipboard platform was 28.36 m (93 ft) in length with a bridge height of 4.27 m (14 ft). To obtain data on seasonal movements of porpoise, a limited number of transects were made in areas of known porpoise concentrations. When a sighting was made, the following variables were recorded: time, angle, number of reticles to the sighting, radar distance (nm) to the shoreline at the same angle of the sighting, the species, the count of the porpoise seen (best, high, and low), and the animal(s) direction of travel. Search effort was recoded by noting the time and location of the ship at the beginning and end of each transect. Purpose: Although harbor porpoises, Phocoena phocoena, are known to occur throughout Alaska waters, few estimates of abundance exist. In 1991, the National Marine Mammal Laboratory initiated a 3 year study on Alaska harbor porpoises. The objectives of this program were to: 1) Obtain minimum population estimates in coastal waters using line transect methodology with a coefficient of variation for density estimates of less than 30% for each survey area, and 2) Establish a baseline for detecting changes in abundance through time, for analysis of trends. The ability of the observers to sight porpoise was sensitive to environmental conditions. As expected, when conditions deteriorated the number of porpoises observed declined. Supplemental information: This dataset and associated effort data were updated on September 8, 2005. Those who downloaded them before that date should renew them.

資料紀錄

此資源出現紀錄的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。核心資料表包含 530 筆紀錄。

此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。

版本

以下的表格只顯示可公開存取資源的已發布版本。

如何引用

研究者應依照以下指示引用此資源。:

Dahlheim, M. E., P. A. White, J. M. Waite. 2009. Cetaceans of Southeast Alaska: distribution and seasonal occurrence. Journal of Biogeography. 36: 410-426.

權利

研究者應尊重以下權利聲明。:

此資料的發布者及權利單位為 OBIS-SEAMAP。 This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.

GBIF 註冊

此資源已向GBIF註冊，並指定以下之GBIF UUID: 0ec2458e-e412-47d0-9a61-b6e70acf6b1c。 OBIS-SEAMAP 發佈此資源，並經由Ocean Biodiversity Information System同意向GBIF註冊成為資料發佈者。

關鍵字

Occurrence,harbor porpoise,Phocoena phocoena,abundance,marine mammal survey,survey,marine mammal,cetacean,Vessels,Sightings; Observation; Occurrence

外部資料

此資源尚有其他格式可用

OBIS-SEAMAP Dataset Page	http://seamap.env.duke.edu/dataset/147 UTF-8 Interactive map
FGDC Metadata	http://seamap.env.duke.edu/dataset/147/xml UTF-8 XML

聯絡資訊

Kimberly Goetz

擁有者 ●
出處 ●
連絡人

Primary contact

Duke University

ktg4@duke.edu

Janice Waite

擁有者 ●
出處 ●
連絡人

Primary contact

National Marine Mammal Laboratory

Janice.Waite@noaa.gov

OBIS-SEAMAP

元數據提供者 ●
散布者

Marine Geospatial Ecology Lab, Duke University

A328 LSRC building

27708 Durham

NC

US

seamap-contact@duke.edu

http://seamap.env.duke.edu

地理涵蓋範圍

Alaska,Alaskan Peninsula,Kodiak Archipelego

界定座標範圍	緯度南界經度西界 [54.82, -136.601], 緯度北界經度東界 [58.989, -131.087]

分類群涵蓋範圍

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Order	Cetacea (cetaceans), Cetacea (cetaceans), Cetacea (cetaceans), Cetacea (cetaceans)
Species	Phocoenoides dalli (Dall's Porpoise), Phocoena phocoena (Harbor Porpoise), Phoca vitulina (Harbor Seal), Megaptera novaeangliae (Humpback Whale), Orcinus orca (Killer Whale), Lagenorhynchus obliquidens (Pacific White-sided Dolphin)

時間涵蓋範圍

起始日期 / 結束日期	1992-04-29 / 1992-05-12

計畫資料

無相關描述

計畫名稱	NMML Harbor Porpoise Vessel, SE Alaska, Spring 1992
經費來源	NA

參與計畫的人員:

Kimberly Goetz

擁有者

Janice Waite

擁有者

取樣方法

NA

研究範圍	NA

方法步驟描述:

NA

收藏資料

蒐藏名稱	zd_147
蒐藏編號	zd_147
上層採集品識別碼	OBIS-SEAMAP

額外的詮釋資料

marine, harvested by iOBIS

目的	Although harbor porpoises, Phocoena phocoena, are known to occur throughout Alaska waters, few estimates of abundance exist. In 1991, the National Marine Mammal Laboratory initiated a 3 year study on Alaska harbor porpoises. The objectives of this program were to: 1) Obtain minimum population estimates in coastal waters using line transect methodology with a coefficient of variation for density estimates of less than 30% for each survey area, and 2) Establish a baseline for detecting changes in abundance through time, for analysis of trends. The ability of the observers to sight porpoise was sensitive to environmental conditions. As expected, when conditions deteriorated the number of porpoises observed declined.
替代的識別碼	http://ipt.env.duke.edu/resource?r=zd_147

目的

Although harbor porpoises, Phocoena phocoena, are known to occur throughout Alaska waters, few estimates of abundance exist. In 1991, the National Marine Mammal Laboratory initiated a 3 year study on Alaska harbor porpoises. The objectives of this program were to: 1) Obtain minimum population estimates in coastal waters using line transect methodology with a coefficient of variation for density estimates of less than 30% for each survey area, and 2) Establish a baseline for detecting changes in abundance through time, for analysis of trends. The ability of the observers to sight porpoise was sensitive to environmental conditions. As expected, when conditions deteriorated the number of porpoises observed declined.

替代的識別碼

http://ipt.env.duke.edu/resource?r=zd_147