說明
The distribution of marine mammal species in many areas remains poorly understood, especially as observations for some taxa are rare and large-scale surveys are time consuming and extremely costly. Here, we present 36 records of 7 cetacean species (Balaenoptera brydei, B. musculus subspp., Delphinus delphis, Globicephala sp., Grampus griseus, Physeter macrocephalus, Pseudorca crassidens) in the New Caledonia Basin, Tasman Sea. Data were derived from a platform of opportunity during a seismic survey that ran between December 2015 and March 2016, inclusively. The two most frequently encountered species were sperm whales (Physeter macrocephalus, 13 sightings, 5 acoustic detections) and blue whales (Balaenoptera musculus subspp., 8 visual detections). All encountered species are known to occur in New Zealand waters at least occasionally, based on historical sightings and stranding records. However, data presented here are the first cetacean records for this specific area and demonstrate that seismic vessels can act as a platform of opportunity for studying cetacean distribution in poorly accessible areas. Such data will aid future research efforts including species distribution models on cetaceans in the South Pacific.
資料紀錄
此資源sampling event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 36 筆紀錄。
亦存在 2 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
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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。:
Peters K J, Stockin K A (2024). Cetacean sighting records during a seismic survey in the New Caledonia Basin, Tasman Sea, 2015-6. Version 1.0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Samplingevent dataset. https://nzobisipt.niwa.co.nz/resource?r=cetaceans_newcaledoniabasin_2015&v=1.0
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 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 8c5b8c75-ea71-43f3-ab1a-8706ab732e3b。 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node 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; Observation
聯絡資訊
- 元數據提供者 ●
- 出處 ●
- 連絡人
- 出處
地理涵蓋範圍
Tasman Sea
| 界定座標範圍 | 緯度南界 經度西界 [-38.839, 164.9], 緯度北界 經度東界 [-31.55, 173.669] |
|---|
分類群涵蓋範圍
Cetaceans (whales and dolphins)
| Order | Cetartiodactyla |
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時間涵蓋範圍
| 起始日期 / 結束日期 | 2015-12-18 / 2016-03-28 |
|---|
取樣方法
Cetacean surveys were completed in the southern sector of the New Caledonia Basin in the Tasman Sea to the west of New Zealand’s North Island. A total survey area coverage of 205,000 km2 was achieved, from ~200 km from New Zealand’s west coast (171.430609 E, 37.650542 S), extending 1,200 km onto the New Zealand extended continental shelf (163.322699 E, 32.446492 S). Water depth in the basin ranges from 2,000–3,500 m. The geophysical seismic survey vessel Hai Yang Shi You 718 was deployed to conduct a two-dimensional (2D) marine seismic survey between 18 December 2015 and 28 March 2016. As required under the 2013 New Zealand Code of Conduct for Minimising Acoustic Disturbance to Marine Mammals from Seismic Survey Operations, qualified and80trained marine mammal observers and passive acoustic monitoring (PAM) operators maintained a 24-hour monitoring program for cetaceans, this way serving as an opportunistic observational platform.
| 研究範圍 | New Caledonia Basin, Tasman Sea |
|---|
方法步驟描述:
- Visual observations were completed by two MMOs in rotating shifts (one MMO on duty at any time) during daylight hours (dawn to dusk) from the bridge, bridge deck and wings of the seismic vessel, providing 360° visibility of the area at a height of 16.5 m above sea level. Observers predominantly scanned the area for cetaceans with the naked eye but used binoculars (7 x 50 magnification) to search the horizon and to determine species and estimate group size. When cetaceans were sighted, observers estimated the radial sighting distance to the animal(s) using the binoculars’ reticules following (Lerczak and Hobbs 1998). Time of day, GPS position, water depth and species were further recorded. Species determination included an indication of observer confidence ranging between ‘certain’ (100%), ‘probable’ (75%) and ‘possible’ (50%).
- In addition to the visual observations, passive acoustic monitoring (PAM) was conducted continuously by two experienced PAM operators during the entire survey (one PAM operator on duty at any time). There were three complete Seiche PAM systems onboard. Each system comprised one hydrophone array, one tow cable, one deck cable plus all electronics such as computers and audio interfaces. The towed hydrophone array consisted of four hydrophones (two low-frequency and two high-frequency) towed using a 240 m long cable at a depth of 27 m, 20 m forward of the air guns. The AD/DA audio interfaces were RME Fireface 800 - sampling rates up to 192,000 Hz (Hertz) and NI USB-6251 - sampling rates up to 500,000 Hz. At the PAM workstation, an Intel i5-3570 CPU (central processing unit), 3.40 GHz (Gigahertz) with 8 GB (Gigabyte) RAM (random access memory) was running PAMGuard version 1.14.00 Beta. This was connected to the vessel’s global positioning system (GPS) via the National Marine Electronics Association (NMEA) serial port at a baud rate of 9,600. All three hydrophone arrays were tap tested and calibrated for depth while in transit to the survey area. The final PAMGuard configuration was set to detect endemic and vagrant cetaceans using high and low frequency click detectors with respective ranges of 0–24 kHz (kilohertz) and 10 Hz–250 kHz.
引用文獻
- Peters, K. J., & Stockin, K. A. (2022). Cetacean sighting records in the New Caledonia Basin, Tasman Sea, New Zealand. New Zealand Journal of Marine and Freshwater Research, 56(1), 135–149. https://doi.org/10.1080/00288330.2020.1867201
額外的詮釋資料
marine, harvested by iOBIS