ArticleScientific reports2019
Increasing trends in fecundity and calf survival of bottlenose dolphins in a marine protected area.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed, 24 citations in OpenAlex.
- Reduced Adult Survival Estimated in Areas of Decline of Harbour Seal Populations in Scotland.Ecology and evolution · 2025Article
- Correction to: 'Dolphin social phenotypes vary in response to food availability but not the North Atlantic Oscillation index' (2023), by Fisher and Cheney.Proceedings. Biological sciences · 2025Article
- Dolphin social phenotypes vary in response to food availability but not the North Atlantic Oscillation index.Proceedings. Biological sciences · 2023Article
- Immigration as the main driver of population dynamics in a cryptic cetacean.Ecology and evolution · 2023Article
- Joint estimation of survival and breeding probability in female dolphins and calves with uncertainty in state assignment.Ecology and evolution · 2019Article
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Estimates of temporal variation in demographic rates are critical for identifying drivers of population change and supporting conservation. However, for inconspicuous wide-ranging species, births may be missed and fecundity rates underestimated. We address this issue using photo-identification data and a novel robust design multistate model to investigate changes in bottlenose dolphin fecundity and calf survival. The model allows for uncertainty in breeding status, and seasonal effects. The best model estimated an increase in the proportion of females with newborn calves from 0.16 (95% CI = 0.11-0.24) in 2001 to 0.28 (95% CI = 0.22-0.36) in 2016. First year calf survival also increased over this period from 0.78 (95% CI = 0.53-0.92) to 0.93 (95% CI = 0.82-0.98). Second year calf survival remained lower, but also showed an increase from 0.32 (95% CI = 0.19-0.48) to 0.55 (95% CI = 0.44-0.65). Females with newborn calves had a slightly higher mortality than those with older calves, but further work is required to evaluate potential costs of reproduction. This study presents a rare example of empirical evidence of a positive trend in reproduction and survival for a cetacean population using a Marine Protected Area.
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