Article
Biodiversity Conservation
Constanza S. Weinberger, Juliana A. Vianna, Sylvain Faugeron, Pablo A. Marquet
Summary: The study found that the South American Sea Lion is highly susceptible to climatic and anthropogenic disturbances, with a spatial genetic structure. Despite recent demographic bottlenecks, the genetic diversity remains high, likely due to the dynamic nature of large and connected metapopulations in otariids.
DIVERSITY AND DISTRIBUTIONS
(2021)
Article
Biology
Kathryn V. Walter, Daniel Conroy-Beam, David M. Buss, Kelly Asao, Agnieszka Sorokowska, Piotr Sorokowski, Toivo Aavik, Grace Akello, Mohammad Madallh Alhabahba, Charlotte Alm, Naumana Amjad, Afifa Anjum, Chiemezie S. Atama, Derya Atamturk Duyar, Richard Ayebare, Carlota Batres, Mons Bendixen, Aicha Bensafia, Boris Bizumic, Mahmoud Boussena, Marina Butovskaya, Seda Can, Katarzyna Cantarero, Antonin Carrier, Hakan Cetinkaya, Ilona Croy, Rosa Maria Cueto, Marcin Czub, Daria Dronova, Seda Dural, Izzet Duyar, Berna Ertugrul, Agustin Espinosa, Ignacio Estevan, Carla Sofia Esteves, Luxi Fang, Tomasz Frackowiak, Jorge Contreras Garduno, Karina Ugalde Gonzalez, Farida Guemaz, Petra Gyuris, Maria Halamova, Iskra Herak, Marina Horvat, Ivana Hromatko, Chin-Ming Hui, Jas Laile Jaafar, Feng Jiang, Konstantinos Kafetsios, Tina Kavcic, Leif Edward Ottesen Kennair, Nicolas Kervyn, Truong Thi Khanh Ha, Imran Ahmed Khilji, Nils C. Kobis, Hoang Moc Lan, Andras Lang, Georgina R. Lennard, Ernesto Leon, Torun Lindholm, Trinh Thi Linh, Giulia Lopez, Nguyen Van Luot, Alvaro Mailhos, Zoi Manesi, Rocio Martinez, Sarah L. McKerchar, Norbert Mesko, Girishwar Misra, Conal Monaghan, Emanuel C. Mora, Alba Moya-Garofano, Bojan Musil, Jean Carlos Natividade, Agnieszka Niemczyk, George Nizharadze, Elisabeth Oberzaucher, Anna Oleszkiewicz, Mohd Sofian Omar-Fauzee, Ike E. Onyishi, Baris Ozener, Ariela Francesca Pagani, Vilmante Pakalniskiene, Miriam Parise, Farid Pazhoohi, Annette Pisanski, Katarzyna Pisanski, Edna Ponciano, Camelia Popa, Pavol Prokop, Muhammad Rizwan, Mario Sainz, Svjetlana Salkicevic, Ruta Sargautyte, Ivan Sarmany-Schuller, Susanne Schmehl, Shivantika Sharad, Razi Sultan Siddiqui, Franco Simonetti, Stanislava Yordanova Stoyanova, Meri Tadinac, Marco Antonio Correa Varella, Christin-Melanie Vauclair, Luis Diego Vega, Dwi Ajeng Widarini, Gyesook Yoo, Marta Marta Zat'kova, Maja Zupancic
Summary: The relationship between sex ratio and human mating behaviors and preferences has been explored, revealing that people tend to have more demanding preferences for attractiveness and resources in areas where the opposite sex is abundant.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Review
Ecology
Maritza Sepulveda, Diana Szteren, Joanna Alfaro-Shigueto, Enrique A. Crespo, Luis Rene Duran, Alicia I. Guerrero, Jeffrey C. Mangel, Doris Oliva, Larissa R. Oliveira
Summary: The main issue affecting the conservation of most pinniped species in South American waters is interactions with fisheries and aquaculture. Research and conservation measures are urgently needed to address this problem, particularly for species of conservation concern. This study reviewed research and observations from the last 25 years on pinnipeds' interactions with fisheries and aquaculture in South American waters, highlighting the limited progress in incorporating mitigation measures and the low economic losses associated with sea lion depredation.
Article
Marine & Freshwater Biology
Guillermo J. Sanchez Contreras, Barbara Biancani, Nicola Pussini, Claudia Gili, Livio Galosi, Giacomo Rossi
Summary: An 18-year-old captive South American sea lion presented with severe gastrointestinal symptoms and deteriorated despite treatment, leading to humane euthanasia and necropsy revealing a poorly demarcated hepatic epithelial neoplasia with metastases. Immunohistochemical examination confirmed the tumor as primary hepatic origin with unusual metastases to various organs, including the parathyroid gland. This case represents the first documented instance of hepatocellular carcinoma with metastases to the lungs and parathyroid gland in a South American sea lion.
Article
Environmental Sciences
Felix Ayala, Marco Cardena, Susana Cardenas-Alayza
Summary: The study found microplastics in scat samples of Otaria byronia collected within a natural protected area in southern Peru. A total of 47 plastic particles classified as fibers and fragments were identified, with an average length of 3.02 and 1.19, respectively. The origin of these millimetric plastic particles in the scat of Otaria byronia remains unknown, suggesting the need for further research on the sources and impacts of microplastics on free ranging aquatic species.
REVISTA INTERNACIONAL DE CONTAMINACION AMBIENTAL
(2021)
Article
Hospitality, Leisure, Sport & Tourism
Florian Kock
Summary: The operational sex ratio influences male attitudes towards sex tourism, with a surplus of males leading to increased rationalization and intent. Women, on the other hand, are not sensitive to sex ratios. Sex tourism is seen as a compensatory behavior in response to heightened competition for mates in male-skewed populations.
JOURNAL OF TRAVEL RESEARCH
(2021)
Article
Ecology
Andras Liker, Veronika Bokony, Ivett Pipoly, Jean-Francois Lemaitre, Jean-Michel Gaillard, Tamas Szekely, Robert P. Freckleton
Summary: The evolution of sexual size dimorphism is influenced by adult sex ratio, as an increase in male bias leads to greater male deviation from the average size. This relationship is not solely explained by differences in mortality rates between the sexes, but may be a result of selection pressures favoring larger size in the rarer sex.
Article
Microbiology
Carlos Sacristan, Samira Costa-Silva, Laura Reisfeld, Pedro Enrique Navas-Suarez, Ana Carolina Ewbank, Aricia Duarte-Benvenuto, Natalia Coelho Couto de Azevedo Fernandes, Rodrigo Albergaria Ressio, Marzia Antonelli, Janaina Rocha Lorenco, Cintia Maria Favero, Juliana Marigo, Cristiane Kiyomi Miyaji Kolesnikovas, Jose Luiz Catao-Dias
Summary: An adult male South American sea lion stranded alive in southern Brazil in 2017, presenting emaciation and a cervical abscess. Necropsy revealed a novel alphaherpesvirus and pulmonary tuberculosis, along with various bacterial infections. The study highlights the need for further research on the pathogenesis and prevalence of these infections in pinniped species.
BRAZILIAN JOURNAL OF MICROBIOLOGY
(2021)
Article
Psychology, Experimental
Gary L. Brase, Jordann L. Brandner
Summary: The sex ratio in a population plays an important role in mating behaviors and is processed more easily and accurately compared to other environmental information. Faces are privileged content for frequency tracking.
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-GENERAL
(2022)
Article
Ecology
Maritza Sepulveda, Pablo Carrasco, Renato Quinones
Summary: The study conducted in the most important breeding colony of South American sea lions in central Chile over a twelve-year period revealed that these long-lived species are indicators of ecosystem quality, with the highest numbers observed during the breeding season and the most abundant age-class being adult females. The population size in the colony showed an increase over the study period, especially in the number of pups, highlighting the importance of developing effective long-term protection measures for the conservation of the South American sea lion in this location.
Article
Ecology
Susumu Chiba, Aya Iwamoto, Seina Shimabukuro, Hiroyuki Matsumoto, Karin Inoue
Summary: Adult sex ratio (ASR) is crucial for population management, but its impact on population dynamics is still not well understood. This study investigated the effect of biased ASR on reproductive success in a decapod crustacean. The results showed that an increase in the proportion of males in mating groups led to a decrease in the number of eggs carried by females. This negative effect of ASR was observed at the population level when considering spawning success. Additionally, a male-biased ASR was found to reduce genetic diversity in the population. These findings highlight the importance of considering ASR in population management strategies.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Psychology, Biological
Andreas Filser, Kieron Barclay, Amber Beckley, Caroline Uggla, Sebastian Schnettler
Summary: The study finds that in areas with a surplus of men, male violent offending rates increase significantly, while overall crime rates show a negative correlation. Male violence against other men is more influenced by sex ratios, while violence against women is not affected. There are also differences between men with and without children.
EVOLUTION AND HUMAN BEHAVIOR
(2021)
Article
Ecology
Keryea Soong, Guan-Lin Yu, Chia-Hsuan Hsu, Gwo-Liang Chang, Shi-Jie Lin
Summary: A study on sea urchins in southern Taiwan revealed biased sex ratios, with higher mortality rates among females possibly causing the imbalance. The hypotheses of Sampling Bias and Innate mechanisms failed to explain the phenomenon, while the Differential Mortality Hypothesis provided a more plausible explanation for the skewed sex ratios observed in the population.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Microbiology
Sergio Guajardo-Leiva, Valentin Berrios-Farias, Felipe G. Bermudez, Eduardo Castro-Nallar
Summary: Sentinel species can be used to monitor environmental disturbances. In this study, 30 temporally explicit metagenomes and 166 metagenome-assembled genomes (MAGs) from the gut of South American sea lions were analyzed to assess whether changes in gut microbiome composition and gene content could indicate environmental disturbances from salmon farming.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2023)
Article
Ecology
Irina Yu. Prusova, Ekaterina A. Galagovets
Summary: This study investigated the adult and juvenile sex ratios of several common species of calanoid copepods based on zooplankton materials collected from the Black Sea between 2011 and 2017. The findings showed that adult sex ratios were female-biased in all species, but to different extents, reflecting their morphology and ecology. The sex ratios of juveniles were generally close to 1:1, with a slight bias towards females.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
David A. S. Rosen, Carling G. Gerlinsky, Andrew W. Trites
MARINE MAMMAL SCIENCE
(2018)
Article
Oceanography
J. Spitz, V. Ridoux, A. W. Trites, S. Laran, M. Authier
PROGRESS IN OCEANOGRAPHY
(2018)
Article
Fisheries
Rachel D. Neuenhoff, Douglas P. Swain, Sean P. Cox, Murdoch K. McAllister, Andrew W. Trites, Carl J. Walters, Mike O. Hammill
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2019)
Article
Fisheries
Benjamin W. Nelson, Carl J. Walters, Andrew W. Trites, Murdoch K. McAllister
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2019)
Article
Veterinary Sciences
Carling D. Gerlinsky, Martin Haulena, Andrew W. Trites, David A. S. Rosen
JOURNAL OF ZOO AND WILDLIFE MEDICINE
(2018)
Article
Ecology
Tiphaine Jeanniard du Dot, Andrew W. Trites, John P. Y. Arnould, John R. Speakman, Christophe Guinet
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Ecology
Tiphaine Jeanniard du Dot, Andrew W. Trites, John P. Y. Arnould, John R. Speakman, Christophe Guinet
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Biodiversity Conservation
Claudia J. Hernandez-Camacho, Andrew W. Trites
ENDANGERED SPECIES RESEARCH
(2018)
Article
Zoology
Selina Agbayani, Sarah M. E. Fortune, Andrew W. Trites
JOURNAL OF MAMMALOGY
(2020)
Article
Ecology
Sarah M. E. Fortune, Steven H. Ferguson, Andrew W. Trites, Bernard LeBlanc, Valerie LeMay, Justine M. Hudson, Mark F. Baumgartner
MARINE ECOLOGY PROGRESS SERIES
(2020)
Article
Ecology
Hassen Allegue, Austen C. Thomas, Yang Liu, Andrew W. Trites
MARINE ECOLOGY PROGRESS SERIES
(2020)
Article
Zoology
Mariana Diaz Gomez, David A. S. Rosen, Ian P. Forster, Andrew W. Trites
CANADIAN JOURNAL OF ZOOLOGY
(2020)
Article
Multidisciplinary Sciences
Sarah M. E. Fortune, Steven H. Ferguson, Andrew W. Trites, Justine M. Hudson, Mark F. Baumgartner
SCIENTIFIC REPORTS
(2020)
Article
Marine & Freshwater Biology
Sarah M. E. Fortune, Michael J. Moore, Wayne L. Perryman, Andrew W. Trites
Summary: Understanding size-at-age is crucial for determining food requirements and assessing nutritional status of individuals and populations. Accurate growth curves are essential for drug dosages in treating injured animals. Updating body growth models for North Atlantic right whales using new data revealed discrepancies in mass-at-age values, highlighting the need to include a broader range of healthy individuals in the dataset.
MARINE MAMMAL SCIENCE
(2021)
Review
Environmental Sciences
Rob Harcourt, Ana M. M. Sequeira, Xuelei Zhang, Fabien Roquet, Kosei Komatsu, Michelle Heupel, Clive McMahon, Fred Whoriskey, Mark Meekan, Gemma Carroll, Stephanie Brodie, Cohn Simpfendorfer, Mark Hindell, Ian Jonsen, Daniel P. Costa, Barbara Block, Monica Muelbert, Bill Woodward, Mike Weise, Kim Aarestrup, Martin Biuw, Lars Boehme, Steven J. Bograd, Dorian Cazau, Jean-Benoit Charrassin, Steven J. Cooke, Paul Cowley, P. J. Nico de Bruyn, Tiphaine Jeanniard du Dot, Carlos Duarte, Victor M. Eguiluz, Luciana C. Ferreira, Juan Fernandez-Gracia, Kimberly Goetz, Yusuke Goto, Christophe Guinet, Mike Hammill, Graeme C. Hays, Elliott L. Hazen, Luis A. Huckstadt, Charlie Huveneers, Sara Iverson, Saifullah Arifin Jaaman, Kongkiat Kittiwattanawong, Kit M. Kovacs, Christian Lydersen, Tim Moltmann, Masaru Naruoka, Lachlan Phillips, Baptiste Picard, Nuno Queiroz, Gilles Reverdin, Katsufumi Sato, David W. Sims, Eva B. Thorstad, Michele Thums, Anne M. Treasure, Andrew W. Trites, Guy D. Williamss, Yoshinari Yonehara, Mike A. Fedak
FRONTIERS IN MARINE SCIENCE
(2019)