Local recruitment of humpback whales in Glacier Bay and Icy Strait, Alaska, over 30 years
| Autor: | Janice M. Straley, Debbie Steel, Phoebe B. S. Vanselow, Sophie Pierszalowski, Jennifer A. Cedarleaf, C. Scott Baker, Christine M. Gabriele, Janet L. Neilson |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
geography.geographical_feature_category Ecology biology 010604 marine biology & hydrobiology media_common.quotation_subject Immigration Glacier Descendant biology.organism_classification 010603 evolutionary biology 01 natural sciences lcsh:QK1-989 Humpback whale Geography Habitat lcsh:Botany lcsh:Zoology Population growth lcsh:QL1-991 Bay Nature and Landscape Conservation Stratum media_common |
| Zdroj: | Endangered Species Research, Vol 31, Pp 177-189 (2016) |
| ISSN: | 1613-4796 1863-5407 |
| Popis: | We provide new information on the scale at which fidelity and recruitment underlie observed increases in humpback whale Megaptera novaeangliae populations. We used photo- identification records and DNA profiles from whales in Glacier Bay and Icy Strait (GBIS), south- eastern Alaska (SEAK) to investigate 3 sources of population increase over 33 yr (1973�2005): local GBIS recruitment, recruitment from elsewhere in SEAK, and immigration from outside SEAK. We defined 2 temporal strata for these longitudinal records: 'founder' individuals identified from 1973 to 1985 (n = 74; n = 46 with DNA profiles) and 'contemporary' individuals identified from 2004 to 2005 (n = 171; n = 118 with DNA profiles). To distinguish between local recruitment and recruitment from elsewhere in SEAK, we estimated the proportion of the contemporary stra- tum that was either a returning founder or descended from a founder female. After excluding 42 contemporary whales without a known mother or genotype to infer maternity, 73.6% of the con- temporary stratum was confirmed or inferred through parentage analysis to be either a returning founder or a descendant of a founder mother. Of the 25 females with genotypes in the founder stratum, 24 (96%) were either represented in the contemporary stratum, had at least 1 descendant in the contemporary stratum, or both. We found no significant differences in microsatellite allele or mtDNA frequencies between the strata, suggesting little or no immigration from other feeding grounds. Our results highlight the importance of local habitat protection for a recovering species with culturally inherited migratory destinations. |
| Databáze: | OpenAIRE |
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