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Showing 1 to 20 of 44 for “"Cetacean"”.
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The Management and Stewardship of A Cetacean Collection
<p>Cetacean, by definition, is a marine mammal of the order Cetacea; a whale, dolphin or porpoise. In light of their social intellect and friendly appearance, cetaceans are used in institutions such as zoos and aquariums as a source of education and entertainment for the public. Before the Marine …
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Isolation and Genomic Analysis of the Cetacean Y-chromosome
The male-specific mammalian Y-chromosome represents a powerful tool for studying malemediated gene flow and genome evolution. Here it was possible to identify 7 polymorphic microsatellites for the first time in an odontocete species, using a combination of cell culture, cytogenetics and molecular …
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Microanatomic structure of cetacean skin in the urogenital region
… in the urogenital slit and mammary region of cetaceans. There may be an integumentary-linked mechanism in these animals similar to that which causes the milk let-down response in terrestrial mammals. This hypothesis was tested on tissue samples from fourteen animals collected in a standardized …
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Conserving dolphins and fishermen: Combining science and local knowledge to reduce cetacean bycatch
<p>Bycatch is the portion of catch that is neither targeted nor retained by fishermen. It threatens the survival of many marine mammal populations globally, and it occurs in nearly every fishing gear type. Despite its widespread occurrence, observations of bycatch are rare, and scientific data on …
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Narrating Cetacean Conservation: Gray Whale Migration, Histories, and Justice on the North American Pacific Coast
… for broader issues of knowledge production, cetacean conservation and management, coastal environmental justice, and more-than-human relationships.
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Characterization of an aryl hydrocarbon receptor from a cetacean : an approach for assessing contaminant susceptibility in protected species
Some cetaceans bioaccumulate substantial concentrations of halogenated aromatic hydrocarbons (HAH) in their tissues, but little is known about the effects of such burdens on cetacean health. 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and related HAH cause toxicity via activation of the aryl …
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The auditory system of the minke whale (Balaenoptera acutorostrata) : a potential fatty sound reception pathway in a mysticete cetacean
… system of odontocetes, and perhaps mysticete cetaceans as well. In an aquatic habitat where the pinna and air-filled ear canal are no longer effective at collecting and focusing sound towards the ears, we propose that both odontocete and mysticete cetaceans have incorporated fatty tissues into …
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Fishery Interaction Modeling of Cetacean Bycatch in the California Drift Gillnet Fishery to Inform a Dynamic Ocean Management Tool
… of bycatch (presence–absence) of four cetacean species in the California Current System (short-beaked common dolphin Delphinus delphis, northern right whale dolphins Lissodelphis borealis, Risso’s dolphins Grampus griseus, and Pacific white-sided dolphins Lagenorhynchus obliquidens). …
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The auditory system of the minke whale (Balaenoptera acutorostrata) : a potential fatty sound reception pathway in a mysticete cetacean
… system of odontocetes, and perhaps mysticete cetaceans as well. In an aquatic habitat where the pinna and air-filled ear canal are no longer effective at collecting and focusing so'und towards the ears, we propose that both odontocete and mysticete cetaceans have incorporated fatty tissues …
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Cytochrome P450 1A1 and aromatase (CYP19) in cetaceans : enzyme expression and relationship to contaminant exposure
… will aid in understanding the susceptibility of cetaceans to such exposures. Cytochrome P450 1A1 (CYP1A1) induction by planar halogenated aromatic hydrocarbons, including certain polychlorinated biphenyls (PCBs), has been correlated with toxic effects in rodents. CYP1A1 expression was measured in …
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Risk of Ship Strike and Noise Pollution to Cetaceans in the Bering Strait
… This same Strait is important habitat for cetaceans, including cetaceans migrating to northern feeding grounds, and cetaceans that remain in the Arctic region year-round. The overlap between shipping routes and cetacean habitat indicates an increased probability of a ship striking a …
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The environmental factors determining temporal distributions of cetaceans in Mossel Bay, South Africa
A variety of cetacean species make use of the bays along the South African coast for different purposes, including feeding, mating and calving. Sightings of five species of cetaceans were recorded from shore based locations between February 2010 and August 2014 in Mossel Bay, Western Cape. In this …
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Developing a cost-effective monitoring strategy for coastal cetaceans
… to further our knowledge on the distribution of cetaceans around Northern Ireland and the surrounding region. These efforts were driven by a need to conserve and protect cetacean species in light of increasing pressures on the marine environment. Four discrete studies were devised to assess …
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Systematics of cetaceans using restriction site mapping of mitochondrial DNA
A phylogenetic study of eleven cetaceans was undertaken using Restriction Endonuclease Maps (RSM) of mitochondrial DNA (mtDNA). One species from the suborder mysticeti (baleen whales) was sampled, and of the ten odontocetes (toothed whales) sampled two were from the family Ziphiidae (beaked whales) …
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Investigation into the Neurogenetics of Vocal Learning in Tursiops Truncatus, the Bottlenose Dolphin
… them from the surrounding circuits. Although cetaceans are among the most advanced mammalian vocal learners, the underlying brain circuitry of this behavior remains unknown. By studying the neurogenetics of vocal learning in intelligent mammals, we can gain a deeper understanding of the …
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Tetrachlorobiphenyl metabolism, toxicity, and regulation of cytochrome P50 expression in a marine teleost fish
… suggest that 3,3',4,4'-TCB is metabolized by cetacean CYP1A. Both cetacean species expressed microsomal proteins that are immunochemically related to mammalian CYP2B forms. Cytochrome P450 systems from both cetacean species are partially characterized here.
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Uma aborgagem biogeográfica dos cetáceos da costa brasileira
Cetaceans habitats along the Brazilian coast are described according to environmental features in six different areas: Natal-Costinha (5-7ºS), Recife-Salvador (7-l0ºS), Abrolhos Banks (l 7º30'S-18º20'S), Campos Basin (22º-24ºS), Santos Basin (24º-26ºS) and Pelotas Basin (28º-30ºS). The cetacean …
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The importance of sandeel (Ammodytes marinus) for minke whales (Balaenoptera acutorostrata) and white-beaked dolphins (Lagenorhynchus albirostris) in Faxaflói Bay, Iceland
… dolphins (Lagenorhynchus albirostris). These two cetacean species are both known to prey on lesser sandeels (Ammodytes marinus), a high-energy prey, which are found in high density in Faxaflói Bay. The aim of the study was to investigate the predator-prey relationship between sandeels and both …
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First Thirty Days of Life: Examining Calf Behavioral Development in Beluga Whales (<i>Delphinapterus leucas</i>) and Pacific White-Sided Dolphins (<i>Lagenorhyncus obliquidens</i>) at One Zoological Facility
<p>Cetacean development is important for general comparative understanding and the implementation of informed husbandry policies. Due to the inaccessibility of many of these species in the wild, researchers can study managed care populations to better understand basic developmental patterns of …
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