Marine Biology Commons^™

Metabolic Transitions In Embryos Of Artemia Franciscana: Regulation And Consequences For Oxidative Stress, Daniel Anthony Arabie

LSU Doctoral Dissertations

Embryos of Artemia franciscana survive harsh conditions in diapause and anoxia-induced quiescence for years by undergoing deep metabolic transitions. I investigated the relationship between phosphorylation of pyruvate dehydrogenase (PDH) and carbon flux to the tricarboxylic acid (TCA) cycle during metabolic depression. The difference in catalytic activity of the PDH complex (PDC) in maximally phosphorylated and dephosphorylated samples was 16.5-fold. Western blot analysis confirmed the changes in phosphorylation of PDH. Analysis of PDH expression in diapause and post-diapause embryos via phospho-PDH showed no significant differences. Investigation of post-diapause embryos under anoxia showed that phosphorylation of PDH decreased and activated the enzyme. …

Fisheries Management Paper No.286: Western Australian Octopus Resource Harvest Strategy, Department Of Primary Industries And Regional Development, Western Australia

Fisheries Management Papers

Harvest strategies for Western Australia’s (WA) aquatic resources are formal documents developed to support decision-making processes that ensure the outcomes are consistent with the principles of Ecologically Sustainable Development (ESD; Fletcher 2002a) and Ecosystem Based Fisheries Management (EBFM; Fletcher et al. 2012). Harvest strategies are a key component of all contemporary fishery management systems and a requirement for certification under the Marine Stewardship Council (MSC). The objectives of ESD are reflected in the objectives of the Fish Resources Management Act 1994 (FRMA).

This Octopus Resource Harvest Strategy (Harvest Strategy) has been developed and revised in line with the Harvest Strategy …

Wrack Lines Spring-Summer 2025, Volume 25, Number 1, Megan Bard, Ronald Goldberg, Clayton Mcgoldrick, Judy Benson

Wrack Lines

Spring-Summer 2025 issue of CT Sea Grant's biannual magazine focuses on the theme of, "Finding their niche: Unique ways of serving people and the environment," with profiles of six standouts in various environmental fields.

Seasonal Changes In Gene Expression Of The Three Estrogen Receptor Subtypes In The Atlantic Croaker, Micropogonias Undulatus, Elena Mares

Posters - 2025

Vertebrates have multiple estrogen receptor (ER) subtypes which facilitate transcriptional activity of genes when activated by estrogenic ligands. Teleost fish have 3 distinct estrogen receptor subtypes, including ERα, ERβ, and a unique type, ERγ. Each subtype has a different binding affinities to many estrogenic compounds, but their subsequent transcriptional regulatory mechanisms are not wellknown1. The focused species of the project is Micropogonias undulatus, the Atlantic Croaker.

Is Less More, Or More Better? Behavioral Insights From Bottlenose Dolphins During Dolphin Interaction Programs, Megan E. Davis, Alicia Virthe, Heather Manitzas Hill, Kathleen Dudzinski, Michelle Samm, Buck Lyman, Kelly Flaherty Clark, Todd Robeck

Posters - 2025

This poster was created for the 5th annual Research Showcase. From the poster:

Using video recordings collected during randomly selected human-dolphin interaction programs (2022-2023), 19 target dolphins were assessed for their behavioral repertoire, correct and incorrect responses to trainer/guest-given cues, and the total number of unique requested behaviors.

Obstacles And Opportunities In Marine Mammals Care And Welfare: Insights From Trainers, Alicia Virthe, Heather Manitzas Hill, Sabrina Brando

Posters - 2025

This poster was created for the 5th annual Research Showcase. From the poster:

The aims of the study included:

Identifying obstacles faced by caregivers

Exploring beliefs hindering the promotion of animal care and welfare

Highlighting the opportunities that caregivers perceive to maintain and enhance animal welfare and care

Do Otters Remember What They Solved? Manyotters - Collaborative Science, Manyotters, Heather Manitzas Hill, Deirdre Yeater, Caroline M. Delong, Catina Wright, Emily Langdon, Lisa Halstead

Posters - 2025

This poster was created for the 5th annual Research Showcase. From the Poster:

The ManyOtters group seeks to promote studies with larger sample sizes and a variety of species of otters, while developing a collaborative network of scientists. ...

Our initial project focuses on long term memory in otters.

For more information about ManyOtters please visit

https://manyotters.github.io/

Many Otters Project - Coding Analysis Of Otter Behavior With Foraged Puzzles, Isaiah Charles, Andres Vega

Posters - 2025

The study of long-term memory and the cognitive abilities of otters is not extensively documented. This research consisted of the use of foraging puzzles, which are different containers with food inside such as fish, squid, and oysters. This research project, named ManyOtters, takes inspiration from the foraging puzzle techniques exhibited in separate studies (e.g., Saliveros et al., 2022; Ladds et al. 2017). Based on the studies, foraging puzzles have shown to draw engagement for several otter species. The species focused on in this study were Asian small-clawed otters (Aonyx cinereus) and African spotted-necked otters (Hydrictis maculicollis) housed at SeaWorld San …

Nitrogen Processes Within Tropical Mangroves In Australia, M. F. Adame, N. Iram, J. N. Gamboa-Cutz, P. Masque

Research outputs 2022 to 2026

Coastal wetlands have long been identified as ecosystems that can ameliorate N inputs into the ocean. The processes associated with N uptake, transformation, and losses are relatively well understood for temperate wetlands; however, information on tropical wetlands is scarce. In this study, we conducted a whole ecosystem approach to measure N processes within tropical mangroves in the Moresby estuary in northeast Australia. We measured N stocks (trees and soils), inputs from sedimentation, fixation, and accumulation as woody biomass, and outputs through denitrification, anammox, and soil respiration (N2O emissions). Potential denitrification was detected along anammox (average, min-max) at 883 (485–1,450) gN …

Female Beluga Behavior During Breeding Season - It's All About The Males, Alondra-Sophia Martinez, Heather Manitzas Hill, Katie Kolodziej

Posters - 2025

This poster was created for the 5th annual Research Showcase. From the poster:

The current study examined the behavior of adult female belugas during courtship/breeding.

Marine Heatwave Conditions In Western Australia Marine Waters - 26th March 2025, Department Of Primary Industries And Regional Development, Western Australia

Marine Heatwave Notification Reports

Marine heatwave (MHW) conditions across the state have persisted. Category 1 – Moderate conditions continue for the Gascoyne and South Coast Bioregions. The North Coast Bioregion has returned to Category 1 – Moderate conditions. The West Coast Bioregion remains warm but is not categorised as experiencing MHW conditions.

Western Australia’S Marine Heatwave Update - 27 March 2025, Department Of Primary Industries And Regional Development, Western Australia, Arani Chandrapavan

Marine Heatwave Notification Reports

No abstract provided.

Recommendations For Strengthening Blue Carbon Science, Martin Dahl, Paul S. Lavery, Inés Mazarrasa, Jimena Samper-Villarreal, Maria F. Adame, Stephen Crooks, Carlos M. Duarte, Daniel A. Friess, Dorte Krause-Jensen, Carmen Leiva-Dueñas, Catherine E. Lovelock, Peter I. Macreadie, Pere Masqué, Miguel Angel Mateo, Oscar Serrano

Research outputs 2022 to 2026

Blue carbon (BC) habitats (e.g., mangroves, tidal marshes, and seagrasses) are important CO2 sinks but are among the most threatened ecosystems on Earth. Substantial research over the last decade has quantified BC to evaluate the climate benefits associated with habitat conservation and restoration. However, the exponential growth in BC science has resulted in differing approaches that hinder comparison across studies and increase uncertainty. Here, we synthesized existing data to depict the range of uncertainty associated to different BC methodologies and argue that cumulative biases linked to multiple methodologies can result in BC estimates differing by up to 10-fold. We identified …

Atlantic Sharpnose (Rhizoprionodon Terraenovae) Jaw, Rileigh Gonzalez, David Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Linking Water Quality And Climate Change To Long-Term Trends In Species Abundance In Norwalk Harbor, Viktoria Savatorova, Aidan Kieft, Nicole C. Spiller, Kasey Burns

Spora: A Journal of Biomathematics

This study examines the effects of environmental changes on fish populations in Norwalk Harbor, focusing on winter flounder (Pseudopleuronectes americanus), cunner (Tautogolabrus adspersus), northern pipefish (Syngnathus fuscus), and naked goby (Gobiosoma bosci) as examples of species responding to climate-related shifts. We analyze how water temperature, salinity, and dissolved oxygen correlate with fish abundance. To assess statistically significant differences in catch per unit effort (CPUE) across harbor regions, we applied the Kruskal-Wallis test followed by Dunn's post-hoc test. Seasonal variations in CPUE were examined by comparing monthly catch data for each species. K-means …

Raising Awareness About Hydrographic Careers Through Sea-Going Opportunities, Juliet Kinney, Rochelle Wigley, Sara Cardigos, Fahima Bellabad, Larissa Marques Freguette

Center for Coastal and Ocean Mapping

There is a worldwide shortage of hydrographic personnel (van Wegen, 2021, Hydro International 2008).  Calls for action to address this issue include the IHO’s Hydrography at Sea opportunities, while intiatiative such as Seabed 2030 are bringing broader attention to the field and helping to catalyze new discussions and partnerships in hydrography (IHO, 2024).  The global sea floor mapping community needs to develop a broader workforce pipeline.  We would like to highlight the importance of providing time at sea and leadership opportunities in developing a robust workforce.  We start with an overview of a selection of current exchange and training programs …

First Record Of Nesting Ecology And Tumor-Forming Disease In Endangered Green Turtles (Chelonia Mydas) On Taiping Island, Taiwan, Tsung-Hsien Li, Po-Yu Wu, Ming-An Tsai

The Thai Journal of Veterinary Medicine

Taiping Island is an important sea turtle nesting site in Taiwan. However, information on the nesting ecology on Taiping Island is still limited. The present study was conducted between 26 April and 3 June 2023 with the objective of collecting primary data on the sea turtle species that nest on the island. A total of 20 individual nesting green turtles were identified. No other sea turtle species were recorded nesting during this period. Five percent of nesting sea turtles had external tumors. The mean curved carapace length of all nesting female turtles was 98.2 cm. A total of 28 clutches …

Meeting Carbon Dioxide Removal Demand In 2030: The Potential Of Macroalgae Cultivation And Harvest, Lotta Siebert, Jiajun Wu, Lena-Katharina Bednarz, David Keller, Felix Meier, Christine Merk, Sonja Peterson, Wilfried Rickels

Journal of Ocean and Coastal Economics

A growing number of countries have announced net-zero and net-negative emissions targets, but only a few countries provide incentives for carbon dioxide removal (CDR). We derive estimates of countries' hypothetical demand for CDR in 2030 based on their emissions reduction targets under the Paris Agreement. The aggregated average global demand for CDR in the compliance year 2030 is 1064 MtCO₂, 353 MtCO₂, and 124 MtCO₂ for the low, medium, and high-cost CDR scenarios, respectively. This demand comes exclusively from countries and regions with relatively high GDP per capita, relatively high abatement costs and a limited …

Assessment Of Water Pollution Levels In Lake Batur, Indonesia And Their Effect On Water Weed Presence, Syarif Prasetyo, Tri Retnaningsih Soeprobowati, Tirtaduna Tirtaduna, Agus Purnomo, Sri Hartati, Umi Chodrijah, Prihatiningsih Prihatiningsih, Ari Wahyono, Jumari Jumari, Rossi Prabowo

The Philippine Agricultural Scientist

Lake Batur in Bangli Regency, Bali Province is a priority area for ecological quality restoration in Indonesia due to its vulnerability to environmental changes caused by diverse and intensive utilization. Agricultural activities, fisheries, and tourism affect the lake’s water quality, leading to the uncontrolled growth of water weeds such as water hyacinth (Pontederia crassipes). To determine the relationship between water quality, community activities, and water weed presence, water samples were collected from 9 locations consisting of residential, tourist, aquaculture, and agricultural areas. In situ analysis was then conducted to measure turbidity, pH, temperature, dissolved oxygen (DO), total dissolved …

Exploring Managed Retreat Pathways To Community-Led Resilience 1-31-2025, Roger Williams University School Of Law, Marine Affairs Institute

School of Law Conferences, Lectures & Events

No abstract provided.