IMAS Metadata Catalogue
Utilisation of the introduced New Zealand screwshell (Maoricolpus roseus) by native hermit crabs in eastern Tasmania - shell preferences
Interactions between native and introduced species can help to elucidate the impact of exotic species on the broader community. This work examines utilisation of an introduced gastropod, the New Zealand screwshell (Maoricolpus roseus) by native hermit crabs in eastern Tasmania.
Simple
Identification info
- Date (Creation)
- 2008-05-27T13:04:00
Principal investigator
School of Zoology, University of Tasmania (UTAS) - Reid, Anthony
Private Bag 5
Hobart
Tasmania
7001
Australia
- Purpose
- To examine the association between Maoricolpus roseus and hermit crabs - and thereby identify potential impacts of this introduced screwshell on native populations of hermit crabs in eastern Tasmania - specifically looking at shell preferences for occupancy and utilisation of M. roseus shells by species of hermit crabs: Pagurixus handrecki and Micropagurus acantholepis, and the larger P. tuberculatus.
- Credit
- School of Zoology, University of Tasmania
- Credit
- Natural Heritage Trust (NHT) Grant
- Status
- Completed
Principal investigator
Point of contact
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof. (Honours supervisor)
IMAS - Sandy Bay
Private Bag 129
Hobart
Tasmania
7001
Australia
- Spatial representation type
- Text, table
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2003 2003
Vertical element
- Minimum value
- 6
- Maximum value
- 15
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Excel
- Date
- Edition
- 2003
- Global Change Master Directory Earth Science keywords v.5.3.8
-
- Biosphere | Zoology | Crustaceans
- Biosphere | Zoology | Mollusks
- CAAB - Codes for Australian Aquatic Biota v2
-
- 24 079001
- Maoricolpus roseus
- Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
- Keywords (Theme)
-
- Shell length
- Shell width
- Shell weight
- Hermit crab occupancy
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of A. Reid.
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by/2.5/au/88x31.png
License Graphic
- Title
- Creative Commons Attribution 2.5 Australia License
- Website
-
http://creativecommons.org/licenses/by/2.5/au/
License Text
- Other constraints
- The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).
- Other constraints
- This data is yet to be published, please contact the researcher for access to the data.
Associated resource
- Title
- Utilisation of the introduced New Zealand screwshell Maoricolpus roseus by native hermit crabs in eastern Tasmania
- Date (Creation)
- 2008-06-23T16:19:00
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- Part of honours thesis work: Reid, A.P. 2003. Utilisation of the introduced New Zealand screwshell (Maoricolpus roseus) by native hermit crabs in eastern Tasmania: Indications of potential impact. University of Tasmania, Honours Thesis.
Content Information
- Content type
- Physical measurement
- Name
-
Shell length
- Name
-
Shell width
- Name
-
Shell weight
- Name
-
Hermit crab occupancy
Distribution Information
- Distribution format
-
-
Excel
-
Excel
Distributor
Resource lineage
- Statement
- Pagurixus handrecki and Micropagus acantholepis were collected from: Pirates Bay 43°0353 S 147°9425 E (at 6m depth) The larger species, P. tuberculatus, was collected from: Dennes Point 43°03.618 S 147°19.703 E (at 10-15m depth)
- Hierarchy level
- Dataset
Resource lineage
- Statement
- Shell preference trials Trials were conducted in 165x110x55 mm plastic containers with 20mm of sediment and seawater at 14°C. For each trial a naked (no shell) crab was placed at one end of the container with a number of randomly arranged empty shells at the opposite end. Shell occupation was recorded at 1,2,3,6,12,24 and 48 hours - at which the shell occupied was classified as the preferred shell. 1. Shell species preference trials Shell species preferences of P. handrecki and M. acantholepis were investigated using choice and no-choice trials: No-choice trials: A single naked crab was placed in a container equidistant from 3 Bittium granarium or 3 Maoricolpus roseus shells which differed in size (one ~4mm smaller, one ~ 4mm larger and one approx the same size as the crabs original shell). There were 17 replicates for both shell species. Choice trials Individual crabs were offered a single shell of each species available at Pirates Bay (Nassarius nigellus, Bittium granarium, Phasianotrochus irisidontes and Maoricolpus roseus. There were 32 replicates for this trial. 2. Utilisation of Maoricolpus roseus shells by hermit crabs M. roseus shells were used to investigate preference for shell size and condition by hermit crabs. Shell condition Shell condition (aperture damage, spire damage and epibiont fouling) was classified. Experiment 1: individual hermit crabs were given 3 shells of equal condition, but differing in length. Each level of condition was replicated 15 times. Experiment 2: same shell length, but varying levels of condition (for each condition parameter (spire damage=32 replicates, aperture damage=24 replicates, epibiont fouling=28 replicates). Shell size Experiment 1: Naked hermit crabs offered 5 different sized shells. Shells offered in an arc, equal distances from the individual. 35 replicates. Experiment 2: Examined a trade-off between shell size and availability. 10 crabs (similar size) were simultaneously offered 20 shells (10 were expected size, 10 were larger than expected size). Competition for Maoricolpus rosues shells Three competition experiments: 1: 150 naked P. tuberculatus were offered 40 shells of each 5mm size class (14 classes, 560 shells). 2: 62 naked P.handrecki were offered 40 shells of each 5mm size class (14 classes, 560 shells). 3: 150 P. tuberculatus and 49 P. handrecki were placed in aquaria simultaneously and offered 40 shells of each 5mm size class (14 classes, 560 shells).
- Hierarchy level
- Collection session
Resource lineage
- Statement
- A sub-sample of approx 300 Maoricolpus roseus shells were used from each site. Shell length and width were measured to the nearest 0.1 mm using Vernier callipers (shell length = longest distance of the shell from apex to anterior and width = widest part, below aperture). Shell weight was measured to the nearest 0.01g after drying at 110°C for 24 hours. Spire damage was given a relative score of 0-3. Shells were also scored as live, dead and available or dead and unavailable. Shells were broken, and if hermit crabs were present, they were identified to species, sexed and carapace measured with Vernier callipers to the nearest 0.1mm.
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
-
af4559e0-2c70-11dd-bcd1-00188b4c0af8
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/af4559e0-2c70-11dd-bcd1-00188b4c0af8
Point of truth URL of this metadata record
- Date info (Creation)
- 2021-03-30T00:30:40
- Date info (Revision)
- 2021-03-30T00:30:40
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available