Show simple item record

dc.contributor.authorDauod, H. A.
dc.contributor.authorBolger, T.
dc.contributor.authorBracken, J. J.
dc.date.accessioned2011-06-20T16:24:27Z
dc.date.available2011-06-20T16:24:27Z
dc.date.issued1985
dc.identifier.citationDauod, H.A. & Bolger, T. & Bracken, J.J., "Studies on the Minnow Phoxinus Phoxinus (L.) from an Upland Irish Reservoir System", Department of Agriculture and Fisheries [Fisheries Division]en_GB
dc.identifier.issn0578-7327
dc.identifier.urihttp://hdl.handle.net/10793/265
dc.description.abstractThe paper deals with the population structure and biology of the minnow, Phoxinus phoxinus (L.), in the Roundwood Reservoir system. A total of 4,342 minnow were taken during the study period from three locations, 2,796 fish were used to calculate the age distributions and 3,013 were examined for gut contents. The age data, determined from the otoliths, showed that there are five age classes present. The mean length at the end of the first year (O-Group fish), was 3.41 cm, at the end of the second year (I-Group fish) it was 5.32 cm and 6.68 cm at the end of the third year (II-Group). Only thirteen minnow were found to be older than three years. The breeding season is later than normal and peaks in August and September. Sexual maturity is reached by the majority in their second year and all older fish are mature. Egg diameters were shown to be smaller than for fish from midland Irish waters. In the North and South Lakes the dominant food organisms were found to be chironomid and trichopteran larvae, molluscs and Cladocera. The diet of the fish from the Vartry River contained more ephemeropteran nymphs. Seasonal differences in the diet are noted. The influence of the minnow on the associated fish species is discussed. An account of the distribution of the minnow in Ireland is included as an Appendix.en_GB
dc.language.isoenen_GB
dc.publisherDepartment of Agriculture and Fisheries [Fisheries Division]en_GB
dc.relation.ispartofseriesIrish Fisheries Investigations Series A;26
dc.subjectMinnow Phoxinus Phoxinus (L.)
dc.titleStudies on the Minnow Phoxinus Phoxinus (L.) from an Upland Irish Reservoir Systemen_GB
dc.typeMonographen_GB
refterms.dateFOA2018-01-12T03:00:51Z


Files in this item

Thumbnail
Name:
No 26 1985 Studies on the minnow ...
Size:
1.053Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record