AQUAGREEN MARINE RESEARCH
Northern Resident Killer Whale, Orcinus orca, Rubbing-Beach Behaviour Calls
The Northern Resident community of killer whales (Orcinus orca) in British Columbia is known to swim close to shore and rub on beaches at the Robson Bight Micheal-Bigg Ecological Reserve. The purpose of this study was to investigate discrete calls used by these whales during this unique behaviour. Thirty Orcalab recordings from 2004 were analyzed through the Orchive database. Calls used while rubbing at Main Beach were compared to calls used at Cracroft Point on West Cracroft Island during foraging activity. The N1 and N23 calls were used significantly more during beach-rubbing behaviour. The N4 and N16 calls were used more while foraging. Current research is increasing sample size to determine if specific calls are used during certain behaviours. – Orchive Logs
Discrete Calls of Solitary Southern Resident Killer Whale, Orcinus orca, L98 (Tsuxiit / Luna)
The purpose of this research was to determine if L98 (Tsuxiit / Luna) a wild solitary killer whale was emitting vocal calls. During daily monitoring procedures of the young four year old whale, underwater recordings were made in Nootka Sound from September to October 2003. Acoustic analysis revealed L98 using three main calls in Nootka Sound (L98_1, L98_2, L98_3). L98 could be identified by frequent use of two main calls (L98_1 and L98_3). These calls were comparative to Southern Resident killer whale calls S1 and S19 of K and L pod respectively. The L2 matriline (L98’s family) have been known to use both the S1 and S19 calls. This research provides information on isolated killer whale call behaviour and increases knowledge on vocal learning and communication.
Acoustic Analysis of British Columbia Offshore Killer Whales, Orcinus orca
This study compared the discrete calls of Offshore killer whales, Orcinus orca, to previously documented offshore killer whale calls. Seven new offshore killer whale calls were identified. Call frequency was compared between groups of whales recorded in 2001 and 2002. This increased the Offshore killer whale vocal database to 104 calls in their repertoire. Call frequency was compared between groups of whales recorded in 2001 and 2002. The Offshore killer whales recorded in 2001 used new call types significantly more than those in 2002. Therefore, the 2001 Offshore killer whales may be a different group that was utilizing a repertoire of newly identified calls. Offshore killer whales utilizing similar repertoires may be of the same family pod. These results reveal that Offshore killer whales may be utilizing group-specific calls like Resident killer whales.
Behavioral Observations of a Solitary False Killer Whale, Pseudorca crassidens
The purpose of this study was to determine why a Pseudorca crassidens, False Killer Whale, was attracted to boats in the waters of English Bay, Roberts Bank, and Whytecliff Park, Vancouver BC. This paper reviewed reports of solitary sociable cetaceans worldwide. The information in these documents were compared to the history and behaviour of the lone Pseudorca. This study makes known why the Pseudorca repeatedly followed certain vessels. Similar circumstances have left other Delphinidae alone and separated from their family groups. The social behaviour of Odontocetes lead individuals to become attracted to moving objects that emit sound within their family loss area. Vessels that frequent their territory become most familiar to these whales and dolphins.
Bottlenose Dolphin, Tursiops truncatus, Signature Whistles in Baja California
Tursiops truncatus whistles range from multipart loops to rising and falling types. Signature whistles have a very similar shape but not the exact identity temporally each time (Buck 1993). The type of whistle a dolphin uses does not change when it swims isolated from its group members (Janik 1999). The variation at the beginning and end of each signature whistle may change in relation to context caused from change in physiological parameters or to communicate information (Janik et al. 1994). The four types of bottlenose dolphin whistles recorded in the lagoons of Baja California were rise, down, single-loop, and multi-loop. The whistles from each lagoon on either side of the Baja peninsula were likely from different populations because Tursiops truncatus stay in certain community areas (Buck 1993). The repeated rise whistle from Laguna Ojo de Liebre shows how a dolphin’s vocalization can be similar each time and may represent a signature call. The difference in calls between lagoons shows how separate dolphin populations have different vocalizations.
Male Chum Salmon
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