Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico
Fine-scale site fidelity in polygynous pinnipeds influences individual interactions, social stability, and gene flow; over time, demographic processes may be altered, and local extinction of some colonies may occur. The goal of this study was to evaluate fine-scale site fidelity as it relates to re...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2019-12-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3019 |
| _version_ | 1797279546962083840 |
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| author | Andrea Rayas-Estrada Claudia Janetl Hernández-Camacho |
| author_facet | Andrea Rayas-Estrada Claudia Janetl Hernández-Camacho |
| author_sort | Andrea Rayas-Estrada |
| collection | DOAJ |
| description |
Fine-scale site fidelity in polygynous pinnipeds influences individual interactions, social stability, and gene flow; over time, demographic processes may be altered, and local extinction of some colonies may occur. The goal of this study was to evaluate fine-scale site fidelity as it relates to reproductive success of California sea lion, Zalophus californianus, adult females at 3 different reproductive sites in the Los Islotes rookery in La Paz Bay, Baja California Sur, Mexico. Reproductive history data for 5 cohorts of California sea lions marked as pups between 1980 and 1984 were used to estimate the individual fine-scale site fidelity index and the return rate. A Pearson correlation was used to evaluate whether there was a relationship between site fidelity and reproductive success (number of pups that a female had during the stud period) during the 9-yr study period, and a chi-square test was used to compare reproductive success between sites. Adult female California sea lions showed high site fidelity to the colony, with the majority showing site fidelity values >40%; sites A and B had high return rates, whereas site C was the least preferred. There was no significant difference in the relationship between the fine-scale site fidelity index and reproductive success, or in reproductive success between sites. The high degree of fine-scale site fidelity apparently has not had negative effects on this colony, as evidenced by the significant increase in population size over the last 3 decades and the relatively high reproductive rates.
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| first_indexed | 2024-03-07T16:26:25Z |
| format | Article |
| id | doaj.art-3ad2214d750c4206afe11165ed105a39 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:26:25Z |
| publishDate | 2019-12-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-3ad2214d750c4206afe11165ed105a392024-03-03T17:34:24ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532019-12-0145410.7773/cm.v45i4.3019Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, MexicoAndrea Rayas-Estrada0Claudia Janetl Hernández-Camacho1Universidad Autónoma de Baja California SurInstituto Politécnico Nacional–Centro Interdisciplinario de Ciencias Marinas Fine-scale site fidelity in polygynous pinnipeds influences individual interactions, social stability, and gene flow; over time, demographic processes may be altered, and local extinction of some colonies may occur. The goal of this study was to evaluate fine-scale site fidelity as it relates to reproductive success of California sea lion, Zalophus californianus, adult females at 3 different reproductive sites in the Los Islotes rookery in La Paz Bay, Baja California Sur, Mexico. Reproductive history data for 5 cohorts of California sea lions marked as pups between 1980 and 1984 were used to estimate the individual fine-scale site fidelity index and the return rate. A Pearson correlation was used to evaluate whether there was a relationship between site fidelity and reproductive success (number of pups that a female had during the stud period) during the 9-yr study period, and a chi-square test was used to compare reproductive success between sites. Adult female California sea lions showed high site fidelity to the colony, with the majority showing site fidelity values >40%; sites A and B had high return rates, whereas site C was the least preferred. There was no significant difference in the relationship between the fine-scale site fidelity index and reproductive success, or in reproductive success between sites. The high degree of fine-scale site fidelity apparently has not had negative effects on this colony, as evidenced by the significant increase in population size over the last 3 decades and the relatively high reproductive rates. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3019philopatryreproductive successinbreedingGulf of California |
| spellingShingle | Andrea Rayas-Estrada Claudia Janetl Hernández-Camacho Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico Ciencias Marinas philopatry reproductive success inbreeding Gulf of California |
| title | Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico |
| title_full | Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico |
| title_fullStr | Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico |
| title_full_unstemmed | Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico |
| title_short | Fine-scale site fidelity in California sea lions, Zalophus californianus, in the colony at Los Islotes, La Paz Bay, Mexico |
| title_sort | fine scale site fidelity in california sea lions zalophus californianus in the colony at los islotes la paz bay mexico |
| topic | philopatry reproductive success inbreeding Gulf of California |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3019 |
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