[MARMAM] New paper: Short-term reactions and long-term responses of bottlenose dolphins to biopsy sampling

Gabriela de Tezanos Pinto gdet002 at aucklanduni.ac.nz
Wed Jun 22 02:58:04 PDT 2011


A new paper is now available:

*Short-term reactions and long-term responses of bottlenose dolphins
truncatus) to remote biopsy sampling*

* *

G Tezanos-Pinto and CS Baker

New Zealand Journal of Marine and Freshwater Research

iFirst, 2011, 1_17

To link to this Article: DOI: 10.1080/00288330.2011.583256

URL: http://dx.doi.org/10.1080/00288330.2011.583256


We analyse short-term individual and groupbehavioural reactions and
long-term individual responses of bottlenose dolphins (Tursiops truncatus)
in New Zealand to remote skin biopsy sampling. The biopsy system employed
uses a small stainless steel tip (5-mm diameter, 9-mm length) mounted on a
lightweight polycarbonate projectile, fired from a modified veterinary rifle
with adjustable pressure. Individual and group behavioural reactions were
scored on a 5-point scale from 0 (no reaction) to 5 (strenuous reaction). A
total of 187 individual and 145 group behavioural reactions were recorded
from the Bay of Islands subpopulation, while 38 individual and 39 group
behavioural reactions were recorded from the Doubtful Sound subpopulation.
Short-term reactions (B1 min duration) were ranked from low or mild (levels
1_2), as evidenced by startle responses, to moderate (level 3), as evidenced
by multiple leaps of the sampled individual. Most attempts (99%) resulted in
only mild reactions with only two attempts resulting in moderate reactions.
There were no strenuous reactions by individuals or groups and no
significant differences in behavioural reactions between the two
subpopulations. Analyses of resighting rates and capture probabilities based
on individual identification records for 40 of the biopsied dolphins showed
no evidence of long-term avoidance responses. Wound healing was documented
in for 10 dolphins across periods of 3 days to 7 months. Results reported
here agree with previous findings showing that remote biopsy sampling causes
only short-term reactions in both the targeted individual and its group.

PDF's can be requested to: gaby at pachamama.co.nz

Thank you,

Gabriela Tezanos-Pinto
The University of Auckland
Auckland, New Zealand
Phone (64) 9-255 5560
E-mail: gaby at pachamama.co.nz
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