Brief description
Behavioural syndromes are important in the context of understanding the evolution of behaviour. This study examines the lifetime development of shy/bold behaviour of dumpling squid (Euprymna tasmanica). The first component examined correlations of shy/bold behaviour across two test contexts - a threat and a feeding test, measured 5 times during the lifetime of the squid. The second component examined developmental plasticity in shy/bold phenotypes with age and sexual maturity.Lineage
Maintenance and Update Frequency: notPlanned
Statement: Animals for this study were laboratory reared, and were bread from wild-caught adults collected from Kelso, Tasmania.
BEHAVIOURAL TESTS
Squid were housed in individual containers - 14cm diameter and 13 cm deep until 10 weeks posthatching, at which time they were moved to larger containers 34x29x13 cm; both contained 1-3 cm of sand.
Behavioural experiments occurred in the same containers that squid were housed in. Behaviours were recorded using a audiocassette recorded and handheld timer 5 min after the stimulus was introduced. Tests were run on 2 days within a week at ages 3, 6, 9, 12 and 16 weeks of age. Results within each week were aggregated to create weekly results for single behaviours for each squid, for each test.
1. Threat test
The threat stimulus consisted of the experimenter touching the squid with a prod on its arms, up to 10 times or until it retreated. Five behaviours were measured:
- number of touches before retreat
- first response (a categorical variable)
- frequency of jetting
- number of times the prod was grabbed
- frequency of arm flower postures
2. Feeding test
These consisted of live food presentation (mysid shrimp). All test squid were starved for 48h prior to testing. Three behaviours were recorded:
- latency to feed
- number of feeding attempts
- handling time
Notes
CreditGosling, S.D.
Credit
Moltschaniwskyj, N.A.
Moltschaniwskyj, N.A.
Credit
Schools of Aquaculture and Plant Science at UTAS
Schools of Aquaculture and Plant Science at UTAS
Credit
Holsworth Wildlife grant provided partial funding
Holsworth Wildlife grant provided partial funding
Purpose
To describe the development of shy/bold behaviour of dumpling squid (Euprymna tasmanica) across their lifetime. Within this, the aims were to examine correlations of shy/bold behaviour across different functional contexts, and to examine whether shy/bold phenotypes showed (relative) developmental plasticity in response to age and sexual maturity.
To describe the development of shy/bold behaviour of dumpling squid (Euprymna tasmanica) across their lifetime. Within this, the aims were to examine correlations of shy/bold behaviour across different functional contexts, and to examine whether shy/bold phenotypes showed (relative) developmental plasticity in response to age and sexual maturity.
Created: 17 11 2008
Data time period: 01 08 2002 to 31 01 2003
text: westlimit=146.5; southlimit=-41.5; eastlimit=147.0; northlimit=-41.0
Subjects
23 609001 |
ANIMALS/INVERTEBRATES |
BIOLOGICAL CLASSIFICATION |
Biological Sciences |
Behavioural Ecology |
EARTH SCIENCE |
Ecology |
Euprymna tasmanica |
Mollusks |
Marine and Estuarine Ecology (Incl. Marine Ichthyology) |
animal personality |
behavioural syndromes |
developmental plasticity |
oceans |
shy/bold |
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Other Information
Identifiers
- global : 3822fd99-bc68-42f4-9093-367ad0c33c18