Spey Research Trust
River Spey Trout Tagging Research Project
R. Laughton,
Spey Research Trust, SFB Research Office, 1 Nether Borlum Cottage, Knockando, Morayshire, AB38 7SD, Tel 01340 810841,
email research@speyfisheryboard.com
1. Background
The behaviour and ecological requirements for brown and sea trout within the Spey are poorly understood. Sea trout are an important component of the rod fishery in many estates and beats along the Spey. However, recent catch records indicate a worrying decline.
Brown trout are overlooked resource on the River Spey. In the Upper Spey Protection Order (Loch Insh to Spey Dam) is there a dedicated fishery for resident brown trout and a number of Lochs also support brown trout fisheries. However, along the mainstem brown trout are often frowned upon by salmon anglers because they are perceived to prey upon juvenile salmon. Consequently, they have been actively removed from many areas and are generally killed if caught as a by catch. Little data for brown trout has been recorded along the mainstem fishing beats of the Spey and even less is known of their behaviour and spawning habits. However, it is proven that sea trout and brown trout are the same species and the need for improvements in management and approach. To achieve this good data on the status of the both sea and brown trout within the Spey is required. The Spey Research Trust has recently devised a trout research programme and the key aims are to
a) formally monitor catches of trout within the River Spey,
b) collect data on trout diet and growth rates,
c) collect data on trout movements and exploitation rates,
d) monitor juvenile trout populations,
e) increase awareness of trout biology and conservation.
The current funding bid seeks to examine “c) collect data on trout movements and exploitation rates”.
2. Methods
Local anglers and ghillies will be trained in fish tagging procedures and then issued with tagging guns and purpose made Floy Tags. Each tag has a unique number allowing individual fish to be identified. Data on each fish will be collected including length, weight, sex and a sample of scales retained for age determination. A photograph of the fish may also be collected. A Floy tag is then placed below the dorsal fin and the trout released back to the river.
If the trout is subsequently recaptured information on growth and migration will be gained. A reward scheme for recapture information will also be available to encourage anglers to return the tag data. Anglers will also be encouraged to re-release the trout after recapture. Rewards will include three trout flies, a miniature of Speyside malt and full tagging details of the fish.
As data accumulates information on exploitation rates, re-captures rates and locations will be derived. In addition some data on spawning location may also be gained if tagged trout are obervered in tributaries during October and November.
3. Materials Required
Equipment requirements include Tacht2 Tagging Guns, Floy Tags, Trout Flies and Box.
4. Timing
Project will start in Spring 2006 and run until further notice