Article
Biodiversity Conservation
Brooke A. Biddlecombe, Steven H. Ferguson, Mads Peter Heide-Jorgensen, Darren M. Gillis, Cortney A. Watt
Summary: Using genetic mark recapture analyses, the total abundance of the Eastern Canada-West Greenland bowhead whale population was estimated to be 5173 individuals from 2012 to 2021. This suggests that the population may be plateauing well below the pre-commercial whaling carrying capacity estimate. The population estimate is important for updating conservation efforts.
GLOBAL ECOLOGY AND CONSERVATION
(2023)
Article
Fisheries
Brock M. Huntsman, Lauren Flynn, Colleen A. Caldwell, Abigail J. Lynch, Fitsum Abadi
Summary: Environmental stressors associated with climate change and non-native fish pose significant threats to the conservation of native fish. These risks are exacerbated when these conditions interact at the trailing edge of a population's distribution. In this study, we collected capture-mark-recapture data for Rio Grande cutthroat trout (RGCT) and found that the interaction between non-native trout and total trout density had the strongest impact on RGCT apparent survival rates. Our results support previous findings that non-native salmonids negatively affect survival rates in native trout populations. Furthermore, we observed a negative density effect on RGCT and sympatric brown trout apparent survival, suggesting that higher density populations of RGCT might be more resilient to displacement by non-native trout.
ECOLOGY OF FRESHWATER FISH
(2023)
Article
Ecology
Wei Cai, Stephanie Yurchak, Diana J. Cole, Laura L. E. Cowen
Summary: Capture-recapture experiments estimate population parameters, but tag loss in some populations requires the use of the Jolly-Seber tag loss model. This model addresses parameter redundancy issues and incorporates group heterogeneity.
ECOLOGY AND EVOLUTION
(2021)
Article
Fisheries
Henry H. Hansen, Stephen D. Kachman, Mark A. Pegg, Colin Charles, Douglas A. Watkinson, Eva C. Enders
Summary: Telemetry and mark-recapture methods can provide inconsistent understandings of fish movement patterns. Using a Bayesian framework can help assess these inconsistencies and provide a transparent means of tradeoff evaluation in tagging approaches.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Fisheries
Henry H. Hansen, Stephen D. Kachman, Mark A. Pegg, Colin Charles, Douglas A. Watkinson, Eva C. Enders
Summary: This study evaluates the inconsistencies of fish movement patterns between telemetry and mark-recapture methods using a Bayesian framework. The results show that the telemetry method indicates fish predominantly stay in the river, while the mark-recapture method suggests a greater tendency of downstream movement from the Red River into Lake Winnipeg for channel catfish.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Ecology
Tomas Telensky, David Storch, Petr Klvana, Jiri Reif
Summary: Understanding survival and recruitment rates is crucial for population dynamics, but the presence of transient individuals may bias their estimates. We present an extension of the Pradel model that considers transient individuals and changes in the study area, and propose a simple way to visualize the interlinkage of vital rates.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Article
Ecology
Rachel Bergeron, Gabriel Pigeon, David M. Forsyth, Wendy J. King, Marco Festa-Bianchet
Summary: Large herbivores have varying survival rates depending on their age and sex, with juveniles and senescent adults having lower and more variable survival rates compared to prime-aged adults. This study used long-term capture-mark-recapture data to examine the survival component of eastern grey kangaroo population dynamics. The results showed that kangaroo survival patterns are similar to those seen in ungulates, with sex-age structure playing a significant role in population dynamics.
Article
Biodiversity Conservation
Miriam Soria-Barreto, Alfonso A. Gonzalez-Diaz, Rocio Rodiles-Hernandez, Claudia Patricia Ornelas-Garcia
Summary: The Chiapas killifish Tlaloc hildebrandi is endangered due to human population growth and low genetic diversity. Habitat perturbation and water pollution have led to population decline and extirpation in the Amarillo River subbasin. Urgent conservation efforts, including the establishment of protected areas and habitat restoration, are needed to preserve the species.
ENDANGERED SPECIES RESEARCH
(2023)
Article
Multidisciplinary Sciences
Sophia Volzke, Jaimie B. Cleeland, Mark A. Hindell, Stuart P. Corney, Simon J. Wotherspoon, Clive R. McMahon
Summary: Southern elephant seals, which are highly dimorphic and extremely polygynous, exhibit clear differences in survival rates between males and females of different ages. While overall juvenile survival rates were stable around 80-85% for both sexes, male survival rates were consistently 5-10% lower than females until the age of 8. At this point, male survival rapidly decreased to 50% while female survival rates remained constant at 80%. These differences may be attributed to varying energetic requirements between adult males and females and are less distinct during early juvenile development. Our findings suggest that sex-specific adult survival in this species is influenced by ecological interactions and evolutionary specialization associated with being a highly polygynous marine predator.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Review
Fisheries
K. J. Lees, M. A. MacNeil, K. J. Hedges, N. E. Hussey
Summary: Traditional mark-recapture methods in fisheries may have challenges and biases, while acoustic telemetry mark-recapture methods can overcome these issues but are not commonly used in fisheries management. Studies have identified various types of acoustic telemetry mark-recapture designs, highlighting their benefits and providing planning considerations for wider application.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2021)
Article
Ecology
Yoichiro Kanno, Seoghyun Kim, Kasey C. Pregler
Summary: This study investigated the seasonal correlation between growth and survival in three stream fishes in South Carolina and found differences among species. Negative correlation between growth and survival was observed in two eurythermal species, while no significant correlation was found in a stenothermal species. The study also revealed that body condition decreased from May through November in all three species, potentially explaining the lower survival rates during this period.
Article
Ecology
Mary A. Bishop, Jordan W. Bernard
Summary: The study demonstrates how an empirical Bayesian approach can be used to incorporate directional movement information into the Arnason-Schwarz modeling framework to describe the survival and migration patterns of Pacific herring population in coastal Alaska.
Article
Forestry
David S. Green, Aaron N. Facka, Kevin P. Smith, Sean M. Matthews, Roger A. Powell
Summary: Understanding the role of landscapes managed for timber production in the conservation of forest-obligate species, specifically the fisher, is crucial for preserving biodiversity. Reintroducing fishers into forests managed for timber production can contribute to the recovery of the species in their range. The study suggests that forests with similar landscape conditions may be important for future fisher reintroductions and species recovery.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Biology
Antonio Santos-Moreno, Itandehui Hernandez-Aguilar
Summary: This study estimated the colony size of 14 bat species roosting in a mine and two caves in the Sierra Sur and Costa of the state of Oaxaca, Mexico, with a total estimated number of 20,105 bats. The methodology used allowed for successful estimation of colony size for all registered species, indicating its viability for estimating colony size in other roosts.
REVISTA DE BIOLOGIA TROPICAL
(2021)
Article
Ecology
Heiko Hinneberg, Adam Koroesi, Thomas Gottschalk
Summary: This study investigated the populations of Southern White Admiral in Germany through a three-year capture-mark-recapture study and the use of different dispersal kernels. Results showed that the survival rates and dispersal of the butterfly were influenced by gender, wing deterioration, and population density. The study highlights the urgent need for conservation measures to protect this species and recommends the creation of new habitats near existing ones.
BASIC AND APPLIED ECOLOGY
(2023)