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| Format: | Artículo científico |
| Language: | en |
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The Journal of animal ecology
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/39562521/ |
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| author | Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S |
| author_facet | Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S |
| collection | PubMed - marine biology |
| contents | Reproductive success and offspring survival decline for female elephant seals past prime age. Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S Animals Female Seals, Earless Reproduction Male Aging Longevity Fertility Maternal Age Maternal age can influence reproductive success and offspring fitness, but the timing, magnitude and direction of those impacts are not well understood. Evolutionary theory predicts that selection on fertility senescence is stronger than maternal effect senescence, and therefore, the rate of maternal effect senescence will be faster than fertility senescence. We used a 36-year study of northern elephant seals (Mirounga angustirostris) to investigate reproductive senescence. Our dataset included 103,746 sightings of 1203 known-age female northern elephant seals. We hypothesized that fertility (maternal reproductive success), offspring survival and recruitment into the breeding population, and male offspring production would decline with advanced maternal age. Furthermore, we hypothesized that older females would shorten their moulting haul out to allow for more time spent foraging. We found evidence for both fertility and maternal effect senescence, but no evidence for senescence impacting offspring recruitment or sex ratio. Breeding probability declined from 96.4% (95% CI: 94.8%-97.5%) at 11 years old to 89.7% (81.9%-94.3%) at 19 years old, and the probability of offspring survival declined from 30.3% (23.6%-38.0%) at 11 years old to 9.1% (3.2%-22.9%) at 19 years old. The rates of decline for fertility and maternal effect senescence were not different from each other. However, maternal effect senescence had a substantially greater impact on the number of offspring surviving to age 1 compared to fertility senescence. Compared to a hypothetical non-senescent population, maternal effect senescence resulted in 5.3% fewer surviving pups, whereas fertility senescence resulted in only 0.3% fewer pups produced per year. These results are consistent with evolutionary theory predicting weaker selection on maternal effect than fertility senescence. Maternal effect senescence may therefore be more influential on population dynamics than fertility senescence in some systems. |
| format | Artículo científico |
| id | pubmed_39562521 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | The Journal of animal ecology |
| record_format | pubmed |
| spellingShingle | Reproductive success and offspring survival decline for female elephant seals past prime age. Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S Animals Female Seals, Earless Reproduction Male Aging Longevity Fertility Maternal Age Reproductive success and offspring survival decline for female elephant seals past prime age. Payne, Allison R Czapanskiy, Max F Kilpatrick, A Marm Robinson, Patrick W Munro, Cara M O Ong, Kelli Bastidas, Adrien Negrete, Alegra O Theders, Brecken Stillwell, Bryn Coffey, Danissa Schweitzer, Elijah Baugh, Elise Salazar, Jasmine Chau-Pech, Keenan Rodrigues, Mason Chavez, Mimi Wright, Savanna Rivas, Sofia Reiter, Joanne Costa, Daniel P Beltran, Roxanne S Animals Female Seals, Earless Reproduction Male Aging Longevity Fertility Maternal Age Maternal age can influence reproductive success and offspring fitness, but the timing, magnitude and direction of those impacts are not well understood. Evolutionary theory predicts that selection on fertility senescence is stronger than maternal effect senescence, and therefore, the rate of maternal effect senescence will be faster than fertility senescence. We used a 36-year study of northern elephant seals (Mirounga angustirostris) to investigate reproductive senescence. Our dataset included 103,746 sightings of 1203 known-age female northern elephant seals. We hypothesized that fertility (maternal reproductive success), offspring survival and recruitment into the breeding population, and male offspring production would decline with advanced maternal age. Furthermore, we hypothesized that older females would shorten their moulting haul out to allow for more time spent foraging. We found evidence for both fertility and maternal effect senescence, but no evidence for senescence impacting offspring recruitment or sex ratio. Breeding probability declined from 96.4% (95% CI: 94.8%-97.5%) at 11 years old to 89.7% (81.9%-94.3%) at 19 years old, and the probability of offspring survival declined from 30.3% (23.6%-38.0%) at 11 years old to 9.1% (3.2%-22.9%) at 19 years old. The rates of decline for fertility and maternal effect senescence were not different from each other. However, maternal effect senescence had a substantially greater impact on the number of offspring surviving to age 1 compared to fertility senescence. Compared to a hypothetical non-senescent population, maternal effect senescence resulted in 5.3% fewer surviving pups, whereas fertility senescence resulted in only 0.3% fewer pups produced per year. These results are consistent with evolutionary theory predicting weaker selection on maternal effect than fertility senescence. Maternal effect senescence may therefore be more influential on population dynamics than fertility senescence in some systems. |
| title | Reproductive success and offspring survival decline for female elephant seals past prime age. |
| topic | Animals Female Seals, Earless Reproduction Male Aging Longevity Fertility Maternal Age |
| url | https://pubmed.ncbi.nlm.nih.gov/39562521/ |