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Biosonar behaviour of free-ranging porpoises
Akamatsu, T; Wang, D; Wang, KX; Naito, Y; Akamatsu, T, Natl Res Inst Fisheries Engn, Ibaraki 3140421, Japan
2005-04-22
Source PublicationPROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8452
Volume272Issue:1565Pages:797-801
AbstractDetecting objects in their paths is a fundamental perceptional function of moving organisms. Potential risks and rewards, such as prey, predators, conspecifics or non-biological obstacles, must be detected so that an animal can modify its behaviour accordingly. However, to date few studies have considered how animals in the wild focus their attention. Dolphins and porpoises are known to actively use sonar or echolocation. A newly developed miniature data logger attached to a porpoise allows for individual recording of acoustical search efforts and inspection distance based on echolocation. In this study, we analysed the biosonar behaviour of eight free-ranging finless porpoises (Neophocaena phocaenoides) and demonstrated that these animals inspect the area ahead of them before swimming silently into it. The porpoises inspected distances up to 77 in, whereas their swimming distance without using sonar was less than 20 in. The inspection distance was long enough to ensure a wide safety margin before facing real risks or rewards. Once a potential prey item was detected, porpoises adjusted their inspection distance from the remote target throughout their approach.; Detecting objects in their paths is a fundamental perceptional function of moving organisms. Potential risks and rewards, such as prey, predators, conspecifics or non-biological obstacles, must be detected so that an animal can modify its behaviour accordingly. However, to date few studies have considered how animals in the wild focus their attention. Dolphins and porpoises are known to actively use sonar or echolocation. A newly developed miniature data logger attached to a porpoise allows for individual recording of acoustical search efforts and inspection distance based on echolocation. In this study, we analysed the biosonar behaviour of eight free-ranging finless porpoises (Neophocaena phocaenoides) and demonstrated that these animals inspect the area ahead of them before swimming silently into it. The porpoises inspected distances up to 77 in, whereas their swimming distance without using sonar was less than 20 in. The inspection distance was long enough to ensure a wide safety margin before facing real risks or rewards. Once a potential prey item was detected, porpoises adjusted their inspection distance from the remote target throughout their approach.
SubtypeArticle
KeywordEcholocation Cetacean Finless Porpoise Sonar Dolphin
DepartmentNatl Res Inst Fisheries Engn, Ibaraki 3140421, Japan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; Natl Inst Polar Res, Tokyo 1738515, Japan
Subject AreaBiology ; Ecology ; Evolutionary Biology
DOI10.1098/rspb.2004.3024
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaLife Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS SubjectBiology ; Ecology ; Evolutionary Biology
WOS IDWOS:000229783700004
WOS KeywordNORTHERN ELEPHANT SEALS ; NEOPHOCAENA-PHOCAENOIDES ; ECHOLOCATION SIGNALS ; DOLPHINS ; SYSTEM
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9234
Collection期刊论文
Corresponding AuthorAkamatsu, T, Natl Res Inst Fisheries Engn, Ibaraki 3140421, Japan
Affiliation1.Natl Res Inst Fisheries Engn, Ibaraki 3140421, Japan
2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
3.Natl Inst Polar Res, Tokyo 1738515, Japan
Recommended Citation
GB/T 7714
Akamatsu, T,Wang, D,Wang, KX,et al. Biosonar behaviour of free-ranging porpoises[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2005,272(1565):797-801.
APA Akamatsu, T,Wang, D,Wang, KX,Naito, Y,&Akamatsu, T, Natl Res Inst Fisheries Engn, Ibaraki 3140421, Japan.(2005).Biosonar behaviour of free-ranging porpoises.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,272(1565),797-801.
MLA Akamatsu, T,et al."Biosonar behaviour of free-ranging porpoises".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 272.1565(2005):797-801.
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