Radio-acoustic positioning as a tool for studying site-specific behavior of the white shark and other large marine species

Klimley, A. Peter; Bœuf, Burney J. Le; Cantara, Kelly M.; Richert, John E.; Davis, Scott F.; Sommeran, Sean Van

doi:10.1007/s002270000394

Cited by 78 publications

(57 citation statements)

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“…It is currently admitted that intraperitoneal implantation of a transmitter is presumably an adequate tagging procedure for studying fish behaviour (Eristhee and Oxenford, 2001;Lowry and Suthers, 1998;Klimley et al, 2001;Paukert et al, 2001). Moreover, in our study, SCUBA diving observations suggest that the behaviour described does not originate from tagging artefacts and that a few hours after release, tagged fish reintegrated a school and rapidly adopted similar behaviour to the rest of the group.…”

Section: Discussionsupporting

confidence: 61%

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Jadot

Ovidio

Voss

2002

Aquatic Living Resources

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In the Mediterranean Sea, the fish Sarpa salpa (Sparidae) is the only vertebrate grazer of Posidonia oceanica meadows. In order to gain knowledge about the behaviour of S. salpa and a better understanding of the meadow's primary production recycling, an original study was designed using ultrasonic telemetry to investigate activity patterns and space utilisation in the field. During June-September 2000, we compared diel movements of six adult S. salpa (249-317 mm FL and 313-633 g) in the Bay of Calvi. These fish were tagged by intraperitoneal insertion of ultrasonic transmitters. Their positions were recorded with a directional hydrophone from a small boat with an accuracy between 10 and 50 m, depending on the local environment. The tracking duration ranged from 3 to 22 days (average 11.8 ± 7.3). Locations were performed from at least dawn to dusk or early night, and one fish was tracked during the entire 24-h cycle. Fish were more mobile during the twilight periods, but statistical analysis indicated individual differences for the precise period of mobility. Two major behavioural patterns were observed: first, the fish remained in close vicinity of the harbour during the day and moved away to the north or the south at dusk to access nocturnal sites, occupying a home range of about 4.3 ha. The second behavioural pattern involved persistent occupation of the same sites during day and night within a relatively restricted home range (about 0.8 ha). Great variation in mobility was found and the same individual fish could show both kinds of behaviour. © 2002 Ifremer/CNRS/Inra/IRD/Cemagref/Éditions scientifiques et médicales Elsevier SAS. All rights reserved. RésuméRythmes d'activité de Sarpa salpa (Sparidés) dans un herbier de Posidonia oceanica : étude par télémétrie acoustique en mer Méditerranée, Corse. En Méditerranée, la saupe (S. salpa) est le seul poisson brouteur de l'herbier à P. oceanica. Améliorer nos connaissances sur le comportement de S. salpa permet une meilleure compréhension du recyclage de la production primaire de l'herbier. De juin à septembre 2000, 6 saupes (249-317 mm FL et 313-633 g) capturées dans la baie de Calvi, proche du port de Stareso ont été équipées d'un émetteur à ultrason par une insertion péritonéale et leurs positions ont été enregistrées avec un hydrophone directionnel à bord d'un bateau, avec une précision de 10 à 50 m, en fonction de l'environnement local. Les poissons ont été suivis de 3 à 22 j (moyenne 11,8 ± 7,3 j) et ont été localisés en continu depuis l'aube jusqu'au crépuscule ou au début de la nuit. Un individu a été localisé sur un cycle complet de 24 h. Les individus suivis semblent en général plus mobiles durant l'aube et le crépuscule, même si des différences individuelles ont été observées. Deux principaux types de comportements ont été constatés : (1) la saupe reste à proximité du port durant le jour et se déplace ensuite au crépuscule vers le Nord ou le Sud et occupe des espaces vitaux qui peuvent s'étendre jusqu'à 4,3 ha, (2) le comportement correspond à un...

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Section: Discussionsupporting

confidence: 61%

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Jadot

Ovidio

Voss

2002

Aquatic Living Resources

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“…Upon their return to the coast, acoustically tagged white sharks were routinely detected by receivers at a number of central California locations. Four of these listening stations accounted for a disproportionately high number of detections during the coastal aggregation phase, revealing a preference for a limited number of key hotspots (figure 5 supplementary material, methods S1) of the stationary receivers suggested near-constant patrolling (Goldman & Anderson 1999;Klimley et al 2001) at these key locations over residence periods extending from days to months (maximum ¼ 107 days and minimum ¼ 1; figure 5 and electronic supplementary material, figure S4). These residency periods were punctuated at times by relatively rapid transits to the other monitored sites, away from the original tagging location (mean transit rate ¼ 38.…”

Section: Resultsmentioning

confidence: 99%

Philopatry and migration of Pacific white sharks

et al. 2009

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Advances in electronic tagging and genetic research are making it possible to discern population structure for pelagic marine predators once thought to be panmictic. However, reconciling migration patterns and gene flow to define the resolution of discrete population management units remains a major challenge, and a vital conservation priority for threatened species such as oceanic sharks. Many such species have been flagged for international protection, yet effective population assessments and management actions are hindered by lack of knowledge about the geographical extent and size of distinct populations. Combining satellite tagging, passive acoustic monitoring and genetics, we reveal how eastern Pacific white sharks ( Carcharodon carcharias ) adhere to a highly predictable migratory cycle. Individuals persistently return to the same network of coastal hotspots following distant oceanic migrations and comprise a population genetically distinct from previously identified phylogenetic clades. We hypothesize that this strong homing behaviour has maintained the separation of a northeastern Pacific population following a historical introduction from Australia/New Zealand migrants during the Late Pleistocene. Concordance between contemporary movement and genetic divergence based on mitochondrial DNA demonstrates a demographically independent management unit not previously recognized. This population's fidelity to discrete and predictable locations offers clear population assessment, monitoring and management options.

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“…The position of each transmitter was calculated every 2-5 min and was accurate to AE 1-3 m while within the central portion of buoy array (O'Dor et al 1998). (A complete description of the tracking system can be found in Klimley et al 2001;Golet et al 2006. )…”

Section: Tracking Systemmentioning

confidence: 99%