| 1. |
- Bonar, S. A., et al.
(författare)
-
Standard Methods for Sampling Freshwater Fishes: Opportunities for International Collaboration
- 2017
-
Ingår i: Fisheries. - : Wiley. - 0363-2415 .- 1548-8446. ; 42:3, s. 150-156
-
Tidskriftsartikel (refereegranskat)abstract
- With publication of Standard Methods for Sampling North American Freshwater Fishes in 2009, the American Fisheries Society (AFS) recommended standard procedures for North America. To explore interest in standardizing at intercontinental scales, a symposium attended by international specialists in freshwater fish sampling was convened at the 145th Annual AFS Meeting in Portland, Oregon, in August 2015. Participants represented all continents except Australia and Antarctica and were employed by state and federal agencies, universities, nongovernmental organizations, and consulting businesses. Currently, standardization is practiced mostly in North America and Europe. Participants described how standardization has been important for management of long-term data sets, promoting fundamental scientific understanding, and assessing efficacy of large spatial scale management strategies. Academics indicated that standardization has been useful in fisheries education because time previously used to teach how sampling methods are developed is now more devoted to diagnosis and treatment of problem fish communities. Researchers reported that standardization allowed increased sample size for method validation and calibration. Group consensus was to retain continental standards where they currently exist but to further explore international and intercontinental standardization, specifically identifying where synergies and bridges exist, and identify means to collaborate with scientists where standardization is limited but interest and need occur.
|
|
| 2. |
- Dekker, Willem
(författare)
-
The 2003 Quebec Declaration of Concern About Eel Declines-11 Years Later: Are Eels Climbing Back up the Slippery Slope?
- 2014
-
Ingår i: Fisheries. - : Wiley. - 0363-2415 .- 1548-8446. ; 39, s. 613-614
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- In 2003, scientists gathered at the American Fisheries Society meeting in Québec and raised an urgent alarm in a Declaration of Concern about the state of eel stocks around the world, with less than 1% of juvenile resources remaining (as documented for northern temperate stocks). In the years since, precautionary protective measures have been implemented, monitoring and research have increased, and sustainable management methods have been developed. Recently, several juvenile resources have increased slightly. Reassembled in Québec in 2014, we reflect on what has been achieved since 2003 and what remains to be done.
|
|
| 3. |
- Losee, James
(författare)
-
Volunteer Angling and Technology-Based Solutions Provide the First Estimate of Sea Lice Infections for Wild Coastal Cutthroat Trout (Oncorhynchus Clarkii Clarkii)
- 2023
-
Ingår i: Fisheries. - : Wiley. - 0363-2415 .- 1548-8446. ; 48, s. 97-106
-
Tidskriftsartikel (refereegranskat)abstract
- Anadromous Coastal Cutthroat Trout Oncorhynchus clarkii clarkii are one of the least studied salmonids but are a highly prized target in sport fisheries in coastal waters of the Pacific Northwest. Despite an observed high prevalence of ectoparasite infections, described by sport anglers as "sea lice," there is a paucity of data available on the spatial and temporal occurrence of infections on Coastal Cutthroat Trout. We collaborated with the angling community through social media engagement and an online application to report ectoparasites observed on sport catch. In 2018, we received voluntary reports for 1,493 Cutthroat Trout and 416 salmon catch events in marine waters from the province of British Columbia and the states of Washington, Oregon, and California. These data demonstrated that the number of argulids and copepods per trout varied according to body size, capture month, and area. To evaluate accuracy of voluntary parasite counts, we compared results to parasite counts on cutthroat from sampling events conducted by trained biologists. For both voluntary angler reports and those of biologists, spring months had a lower prevalence of argulids and copepods, argulids were common on trout, but absent on salmon, and larger trout were associated with an increased number of argulid and copepod infections.
|
|
| 4. |
|
|
| 5. |
- Piccolo, John, et al.
(författare)
-
Linking Alaskan salmon fisheries management with ecosystem-based escapement goals : A review and prospectus
- 2009
-
Ingår i: Fisheries. - 0363-2415. ; 34:3, s. 124-134
-
Tidskriftsartikel (refereegranskat)abstract
- A growing body of literature documents that spawning Pacific salmon have profound effects on terrestrial and aquatic ecosystems. This has led to calls for considering ecosystem effects in setting salmon escapement goals; most stocks, however, are still managed using single-species stock-recruit models. Our objective is to ascertain whether current knowledge is adequate for setting ecosystem-based escapement goals, with particular reference to Alaskan fisheries. We review the literature to determine how well the quantitative relationships between salmon and a given ecosystem component (e.g., the growth rate of a given species) have been identified. In most cases, quantitative relationships are not available for a wide enough range of physical and biological conditions to make accurate predictions of the response to a given level of salmon escapement. Thus, fisheries managers might currently have difficulty in justifying ecosystem-based escapement goals. We discuss the potential costs and benefits of increasing escapement goals as a precautionary approach, and the possibility of managing for key species for which quantitative data does exist. We conclude that developing ecosystem-based escapement goals will require better collaboration between researchers and managers. Even under the best of circumstances, however, it will be a long-term process, and the results are likely to be site-specific
|
|
