| Project/Area Number |
21380120
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
General fisheries
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
SHIRAKIHARA Kunio 東京大学, 大学院・新領域創成科学研究科, 教授 (90196618)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
AKAMATSU Tomonari 水産総合研究センター, 水産工学研究所, 研究員 (00344333)
KITAKADO Toshihide 東京海洋大学, 海洋科学部, 准教授 (40281000)
AMANO Masao 長崎大学, 水産学部, 教授 (50270905)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SHIRAKIHARA Miki 東邦大学, 理学部, 訪問研究員 (30449251)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2009: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
|
|---|
| Keywords | 環境 / 海洋保全 / 鯨類 / スナメリ |
|---|
| Research Abstract |
The finless porpoise, a kind of toothed whales, is exposed to human activities. The existence of this species is threatened. Abundance, which is essential information for conservation, has been estimated using sighting surveys. Because the detection probability on the track line, g(0), is hard to be grasped, abundance estimates have been given under an assumption of g(0)=1. We developed a method to estimate g(0) using a combination of acoustic surveys and sighting surveys. We carried out an aerial sighting survey in Ohmura Bay, Nagasaki Prefecture, Japan, in 2010. A population decrease was not detected over these 10 years.
|
