A comparison of growth rates of coarse fish in gravel-pit lakes in south-east England and of population structure in selected lakes

Gee, Alun Stewart (1976) A comparison of growth rates of coarse fish in gravel-pit lakes in south-east England and of population structure in selected lakes. Doctoral thesis, City of London Polytechnic.

[img]
Preview
Text
456376.pdf - Published Version

Download (9MB) | Preview

Abstract / Description

Age and growth rates of the coarse fish of 39 gravel-pit lakes in South-East England are compared. Species composition and growth rate are very variable, the commonest species being roach (Rutilus rutilus L.), bream (Abramis brama L.), tench (Tinca tinca L.), perch (Perca fluviatilis L.) and pike (Esox lucius L.). There was no apparent correlation between fish growth rate and age, size or any other measured parameter of a lake.

Two lakes dominated by pike and perch and four lakes dominated by roach, bream and tench were studied. Two annual estimates of fish population abundance were carried out in these six lakes using the following mark-recapture models: Lincoln Index (Bailey modification); Fisher and Ford (Triple Catch); Leslie (Method B grouping); and Jolly's Stochastic Model. An additional model involving a modification of the Triple Catch method to allow for mortality or change in catchability of marked fish is proposed. These models and methods of marking and tagging fish are critically appraised. A notable criticism is that marked fish cannot be regarded as behaving in the same way as unmarked individuals.

Item Type: Thesis (Doctoral)
Additional Information: uk.bl.ethos.456376
Uncontrolled Keywords: fish growth rates; lakes in South-East England; roach (Rutilus rutilus L.); bream (Abramis brama L.); tench (Tinca tinca L.); perch (Perca fluviatilis L.); pike (Esox lucius L.)
Subjects: 500 Natural Sciences and Mathematics > 590 Animals (Zoology)
Department: Library Services and Special Collections
Depositing User: Mary Burslem
Date Deposited: 22 Jun 2022 15:51
Last Modified: 22 Jun 2022 15:51
URI: http://repository.londonmet.ac.uk/id/eprint/7753

Downloads

Downloads per month over past year



Downloads each year

Actions (login required)

View Item View Item