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Genetic identification of fish caught as by-catch in the Antarctic krill fishery and comparison with observer records
Citation
Polanowski, A and Clark, J and Maschette, D and Welsford, D and Deagle, B, Genetic identification of fish caught as by-catch in the Antarctic krill fishery and comparison with observer records, CCAMLR WG-EMM, 22 June 2018, Hobart, Tasmania, pp. WG-EMM-18/30. (2018) [Refereed Conference Paper]
Official URL: https://www.ccamlr.org/en/wg-emm-18/30
Abstract
- Juvenile/larval fish taken as bycatch in the Antarctic krill fishery (CCAMLR subarea 48.1, 48.2 and 48.3) were identified by DNA barcoding and results compared with morphological identifications made on vessels by scientific observers.
- A total of 344 fish (primarily in the families Channichthyidae and Notothenidae) were identified using genetic barcoding markers.
- Species level identifications provided by observers were good for the common species Champsocephalus gunnari and Lepidonotothen larseni; however, DNA results show several less common Notothenidae species were identified as L. larseni.
- All of Chaenodraco wilsoni icefish (n=67) identified by an observer were actually Chionodraco rastrospinosus based on DNA barcoding.
- Many of the specimens (n=136) were recorded to family-level by observers; genetic barcoding markers allowed these specimens to be assigned to species level.
- The diversity of fish identified by observers (5 families; 8 species) was considerably lower than with DNA barcoding (7 families; 20 species).
- The impact of potential taxonomic misidentifications on fish bycatch datasets needs to be considered. Developing standardised field guides and additional observer training many improve the accuracy of observer taxonomic assignments.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | fish bycatch, genetics, krill fishery |
| Research Division: | Agricultural, Veterinary and Food Sciences |
| Research Group: | Fisheries sciences |
| Research Field: | Fisheries management |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - wild caught |
| Objective Field: | Fisheries - wild caught not elsewhere classified |
| UTAS Author: | Maschette, D (Mr Dale Maschette) |
| ID Code: | 137154 |
| Year Published: | 2018 |
| Deposited By: | Fisheries and Aquaculture |
| Deposited On: | 2020-02-03 |
| Last Modified: | 2020-04-06 |
| Downloads: | 0 |
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