Influence of krill (Euphausia superba) availability on humpback whale (Megaptera novaeangliae) reproductive rate
| dc.career | Escuela de Ciencias Biológicas | es |
| dc.category.author | principal | es |
| dc.contributor.author | Félix Grijalva, Fernando | |
| dc.contributor.corresponding | Félix Grijalva, Fernando | es |
| dc.country | Ecuador | es |
| dc.date.accessioned | 2023-11-04T21:30:27Z | |
| dc.date.available | 2023-11-04T21:30:27Z | |
| dc.date.issued | 2021-03 | |
| dc.dedication.author | TC | es |
| dc.description.abstract | We weighted krill density values as data are overdispersed (i.e., its variance ishigher than its mean), so that using the mean in the analysis would probably lead to a misinterpretation of thecorrelation between variables being tested. Cross-correlation methods allow the identification of the time lag thatmaximizes the correlation between the explanatory and the response variables (Legendre & Legendre, 1998) andwas run in PAST software version 3.0 (Hammer et al., 2001). The result was later used in a regression model run inR software version 4.0.2 (R Core Team, 2020) to test the relationship between krill biomass and RBR weighted byeffort (number of trips of each year). We considered a 0.05 level of significance in the analysis.Relative birth rates of humpback whales were computed from data collected during 278 whale-watching trips(M = 39.7 ± 7.9 per year) (Table 1). A total of 127 calves (M = 18.1 ± 13.2 per year) and 1,637 noncalves (M = 233.8± 130.4 per year) were recorded, excluding resights. The RBR (M = 0.07 ± 0.03) was significantly correlated with krilldensity in the previous year (i.e., lagged by 1 year; r2= 0.9, p = .02; Figure 2). The relationship between RBR and krilldensity in the previous year balanced by the number of trips was also positive and significant (r2= 0.8, p = .02).This is the first time that the relationship between environmental conditions around the Antarctic Peninsula andcalf production by humpback whales from Breeding Stock G has been investigated. | es |
| dc.faculty | Ciencias Exactas y Naturales | es |
| dc.id.author | 1703874204 | es |
| dc.id.type | 1 | es |
| dc.identifier.doi | https://doi.org/10.1111/mms.12805 | es |
| dc.identifier.issn | 0824-0469 | |
| dc.identifier.uri | https://onlinelibrary.wiley.com/doi/abs/10.1111/mms.12805 | es |
| dc.identifier.uri | https://repositorio.puce.edu.ec/handle/123456789/4515 | |
| dc.indexed.database | Scimago Journal Rank | es |
| dc.list.authors | Seyboth, E., Félix, F., Lea, M., Dalla, L., Watters, G., Reid, K., & Secchi, E. | es |
| dc.magazine.pageRange | 1498-1506 | es |
| dc.magazine.title | Marine Mammal Science | es |
| dc.magazine.volumeChapter | 37(4) | es |
| dc.rights | OpenAccess | es |
| dc.state | published | es |
| dc.subject | Ecología marina | es |
| dc.subject | Reproducción animal | es |
| dc.subject | Mamíferos acuáticos | es |
| dc.subject | Ballena | es |
| dc.title | Influence of krill (Euphausia superba) availability on humpback whale (Megaptera novaeangliae) reproductive rate | es |
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