| 000 | 00000cam 2200000za 4500 |
| 001 | 9.855895 |
|---|
| 003 | CaOODSP |
|---|
| 005 | 20241203113642 |
|---|
| 007 | cr ||||||||||| |
|---|
| 008 | 180427s1986 onca|||#o f00| 0 eng d |
|---|
| 040 | |aCaOODSP|beng |
|---|
| 043 | |an-cn-on |
|---|
| 086 | 1 |aCW69-1/57E-PDF |
|---|
| 100 | 1 |aBlokpoel, H., |d1938- |
|---|
| 245 | 14|aThe ring-billed gull in Ontario |h[electronic resource] : |ba review of a new problem species / |cH. Blokpoel, G.D. Tessier. |
|---|
| 260 | |a[Ottawa] : |bCanadian Wildlife Service, |c1986. |
|---|
| 300 | |a34 p. : |bill. |
|---|
| 490 | 1 |aOccasional paper ; |vno. 57 |
|---|
| 500 | |aDigitized edition from print [produced by Environment and Climate Change Canada]. |
|---|
| 500 | |aIssued also in French under title: Le goéland à bec cerclé en Ontario : une nouvelle espèce problème. |
|---|
| 500 | |aErrata sheet inside front cover. |
|---|
| 504 | |aIncludes bibliographical references. |
|---|
| 520 | 3 |a"During the period 1976-84 the nesting population of the Ring-billed Gull (Larus delawarensis) in the Great Lakes and Upper St. Lawrence River increased at an average annual growth rate of 11%. In 1984 there were an estimated 700 000 pairs of Ring-bills in that area (about two-thirds in Canada and one-third in the USA). Because Ring-bills are highly adaptable it is likely that their numbers will continue to increase"--Abstract. |
|---|
| 692 | 07|2gccst|aBirds |
|---|
| 692 | 07|2gccst|aPopulation |
|---|
| 692 | 07|2gccst|aEnvironmental impact |
|---|
| 693 | 4|aRing-billed gull |
|---|
| 700 | 1 |aTessier, G. D. |
|---|
| 710 | 1 |aCanada. |bEnvironment Canada. |
|---|
| 710 | 2 |aCanadian Wildlife Service. |
|---|
| 775 | 08|tLe goéland à bec cerclé en Ontario |w(CaOODSP)9.856578 |
|---|
| 830 | #0|aOccasional paper (Canadian Wildlife Service)|vno. 57|w(CaOODSP)9.504780 |
|---|
| 856 | 40|qPDF|s12.62 MB|uhttps://publications.gc.ca/collections/collection_2018/eccc/CW69-1-57-eng.pdf |
|---|