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Skating on thin ice: Identifying the need for species-specific data and defined migration ecology of Rajidae spp.
Siskey, M.R.; Shipley, O.N.; Frisk, M.G. (2019). Skating on thin ice: Identifying the need for species-specific data and defined migration ecology of Rajidae spp. Fish Fish. 20(2): 286-302. https://dx.doi.org/10.1111/faf.12340
In: Fish and Fisheries. Blackwell Science: Oxford. ISSN 1467-2960; e-ISSN 1467-2979
|  |
| Trefwoorden |
Conservation
Movement
Tagging
Rajidae de Blainville, 1816 [WoRMS]
Marien/Kust |
| Author keywords |
migration ecology; multispecies assessment; skates |
| Auteurs | | Top |
- Siskey, M.R.
- Shipley, O.N.
- Frisk, M.G.
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| Abstract |
Skates (class Chondrichthyes; subclass Elasmobranchii; order Rajiformes; family Rajidae) comprise one quarter of extant chondrichthyans, yet have received little attention in the scientific literature likely due to their relatively low economic value and difficulties in species identification. The absence of species‐specific information on catch, life history and migration of skates has often precluded the development of single‐species stock assessments and led to the use of cursory multispecies assessments, which lack the ability to track species‐specific catch and abundance trends. This has resulted in undetected local extirpations, as has been previously reported for common (Dipturus batis, Rajidae), white (Rostroraja alba, Rajidae) and long‐nose (Dipturus oxyrhinchus, Rajidae) skates in the Irish Sea. Here, we (a) use case studies to illustrate how the perception of skate population structure and stock status has historically been masked through multispecies assessment and management practices, (b) review current information on the movement of skates and identify gaps in knowledge, and (c) identify biases associated with the use of various tagging technologies, which have confounded our understanding of movement and migration ecology of skates. Considering that over 40% of extant Rajidae species are listed as “Data Deficient” by the International Union for Conservation of Nature, we illustrate a critical need to broaden the current understanding of skate life history, movement and migration ecology by providing recommendations on the further application of electronic tags and biogeochemical natural tags in movement studies and highlight the benefits that studies using these approaches have for novel management frameworks. |
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