Sonar characteristics of the harbour porpoise (Phocoena phocoena): source levels and spectrum
نویسندگان
چکیده
منابع مشابه
Mitochondrial DNA variation in the Japanese harbour porpoise (Phocoena phocoena)
They are top predators in coastal ecosystems, but today, are exposed to environmental pollutants and fisheries pressures (Jefferson and Curry, 1994; Beineke et al., 2005; Jepson et al., 2005). Especially, population reduction due to incidental catch has been a growing serious problem in a part of the North Atlantic (Woodley and Read, 1991; Trippel et al., 1996). It is important to understand th...
متن کاملCharacterization of the temporomandibular joint of the harbour porpoise (Phocoena phocoena) and Risso's dolphin (Grampus griseus).
OBJECTIVES The temporomandibular joint (TMJ) in cetaceans is largely uncharacterized. This study aims to describe the macroscopic, microscopic, biochemical and biomechanical features of the TMJ of two species of the suborder Odontoceti: the harbour porpoise (Phocoena phocoena) and Risso's dolphin (Grampus griseus). Furthermore, we aim to elucidate the structure-function relationship of their TM...
متن کاملOrganization of the sleep-related neural systems in the brain of the harbour porpoise (Phocoena phocoena).
The present study provides the first systematic immunohistochemical neuroanatomical investigation of the systems involved in the control and regulation of sleep in an odontocete cetacean, the harbor porpoise (Phocoena phocoena). The odontocete cetaceans show an unusual form of mammalian sleep, with unihemispheric slow waves, suppressed REM sleep, and continuous bodily movement. All the neural e...
متن کاملMorphological and genetic differentiation of the Black Sea harbour porpoise Phocoena phocoena
The ecological and conservation status of the geographically isolated Black Sea harbour porpoise is currently unknown. Although it has been suggested that Black Sea harbour porpoises are distinct from other populations, the implementation of specific conservation plans has been hindered by the absence of a genetic and morphological study with large sample sizes. We sought to test the hypothesis...
متن کاملEqual latency contours and auditory weighting functions for the harbour porpoise (Phocoena phocoena).
Loudness perception by human infants and animals can be studied under the assumption that sounds of equal loudness elicit equal reaction times (RTs). Simple RTs of a harbour porpoise to narrowband frequency-modulated signals were measured using a behavioural method and an RT sensor based on infrared light. Equal latency contours, which connect equal RTs across frequencies, for reference values ...
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ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 1996
ISSN: 1054-3139
DOI: 10.1006/jmsc.1996.0066