Aquaculture and Fisheries Commons^™

Bioresource Management Via Least Cost Feed Formulation For Red Tilapia (Oreochromis Sp.): Application Of Linear Programming Technique, Boudjema Kamel, Redhouane Benfares, Affaf Kord, Toufik Milla, Belkacem Guenachi, Lynda Frai, Rachida Itcher, Hocine Kherzane

Journal of Bioresource Management

The method of linear programming (LP) was utilized to determine the relationship between the composition of nutrients of each ingredients, specifications for raw materials, cost and requirements for nutrients of the red tilapia (Oreochromis sp.), in order to define: (1) least cost ration formulation, (2) least cost diet, (3) minimum price of producing a particular diet after meeting a number of requirements. The resulting LP models were solved using the simplex algorithm. Therefore, our results show that, formulated feed had high protein content (31.92 %), Lipid (2.53), Moisture (9.10 %) and Ash (9.00 %). The utilization of diet …

A Meta-Analysis Of Seafood Species Mislabeling In The United States, Sarah Ahles, Christina A. Mireles Dewitt, Rosalee S. Hellberg

Food Science Faculty Articles and Research

Seafood is vulnerable to mislabeling due to complex global supply chains, varying prices, and the similar appearance of species. While numerous studies have been published on seafood mislabeling, the focus is often on species known to be commonly substituted. Therefore, the overall mislabeling rates of seafood sold in the U.S. remain unknown, especially for the most consumed species. The objective of the current study was to compile the results of seafood mislabeling studies into a single resource to provide informative statistics on U.S. seafood mislabeling. A meta-analysis was conducted on U.S. seafood mislabeling studies that tested commercial samples of bony …

Social Learning And Cultural Enrichment For Fish Welfare, Chiawen Chiang, Becca Franks

Animal Sentience

This commentary examines how understanding animal culture—shared behaviors and knowledge transmitted through social learning—plays a role in advancing welfare practices for captive fishes. Despite extensive evidence of fishes' complex sociocultural capacities, their psycho-social needs remain underestimated and unmet in zoos and aquaria. We explore what considering fish culture might mean for welfare practices: diverse social learning opportunities, cultural development, and thoughtful group management. More knowledge about wild fishes' lives will help bridge the gap between their full, complex lives and current captive welfare practices.

Using Bivalves As An Indicator For Fecal Bacteria, Kamala Chuss

Honors Scholar Theses

This project focuses on the integration of fecal bacteria from warm-blooded animals into bivalve tissue, and the utilization of bivalves as an indicator for fecal bacteria in waterways. Bivalves may give a more representative long-term average of fecal bacteria in water as compared to direct water testing. The primary objective is to create a standard operating procedure to use bacterial testing of bivalves as a proxy for bacteria concentration in the water. This method can be used in places where bivalves do not already exist by adding them to a body of water, or by collecting bivalves that already exist …

Climate Change Affecting Waterfowl Migration, Destiny Fox

D.U.Quark

Climate Change is a major environmental factor in waterfowl migration patterns. Migratory waterfowl are species of birds that live in or around wetlands, mainly including lakes, streams, and marshes. Contaminated bodies of water at stopover sites during migratory seasons can lead to death among many species of waterfowl, as well as water borne diseases from snail eggs. Changing environmental factors can also lead to negative effects on the bird’s ability to forage properly. These environmental factors include the evaporation of several wetlands that have led to waterfowl foraging in local farmers’ land. Focusing more heavily on improving satellite tracking could …

Spatial Ecology Of Large Bodied Ichthyofauna In The Red River Of The North Basin, William Marshall Stuart

School of Natural Resources: Dissertations, Theses, and Student Research

Understanding spatial patterns and processes is essential for designing research studies, implementing management actions, and planning restoration efforts. The Red River of the North basin spans a broad geographic area where jurisdictional oversight is divided among several entities (Manitoba, CAN; North Dakota, USA; Minnesota, USA; South Dakota, USA), creating a mosaic of regulatory and functional process zones. Understanding the spatial ecology of freshwater fishes in this disjointed landscape is essential to address diverse life history requirements and the movement constraints imposed by anthropogenic structures. Long-term acoustic telemetry revealed that large bodied ichthyofauna employ a diverse range of movement strategies (i.e., …

Comparing Metabolism And Hypoxia Tolerance Of Native And Non-Native Florida Freshwater Fishes In Climate Change Scenarios, Benjamin A. Share

All HCAS Student Capstones, Theses, and Dissertations

As climate change brings rising water temperatures and lower dissolved oxygen (DO) concentrations to freshwater bodies, it has become increasingly important to understand how this will affect ecosystems with established non-native or invasive species. Fishes of the family Cichlidae are the most pervasive non-native fishes in the Everglades and may increase their range further north under a changing climate. To better understand potential invasibility and competition with native fishes, the metabolism and hypoxia tolerance of non-native Blue Tilapia Oreochromis aureus was compared to native Bluegill Lepomis macrochirus when acclimated across a range of seasonal and projected temperatures. Intermittent-flow respirometry was …

Understanding Bigeye Scad (Selar Crumenophthalmus) In Southeast Florida: Age-Growth, Reproduction, And Diet, Mariah France

All HCAS Student Capstones, Theses, and Dissertations

In southeastern Florida, the bigeye scad (Selar crumenophthalmus) is highly regarded as a baitfish for targeting billfish and other large sportfishes, often commanding market prices as live bait exceeding $180 per dozen. Despite its economic significance, there is limited knowledge regarding the species within the Atlantic Ocean, especially the population that occurs in Florida. Bigeye scad were collected monthly from local bait shops in Pompano Beach, Miami, and Islamorada to assess age-growth, reproductive behaviors, and dietary habits. Specimens from May to August had the highest values for length-weight relationships and gonadsomatic index, indicative of a spawning season during …

Fisheries Research Report No. 347: Recreational Fishing For Marron In South-West Western Australia From 2000 – 2024: Estimates Of Participation, Effort And Catch, Claire B. Smallwood, Karina L. Ryan, Eva Lai, Fabian I. Trinnie, Aidan Long

Fisheries Research Reports

The Smooth Marron (Cherax cainii) (‘Marron’) is endemic to freshwater dams and rivers of south-west Western Australia. The Recreational Marron Fishery is managed as a single stock within the South-West Recreational Freshwater Resource and is highly vulnerable to over-exploitation due to the biological characteristics of the species (e.g., low fecundity, localised populations) as well as external environmental (e.g., habitat loss, reduction in rainfall) and human factors (e.g., fishing, land clearing).

Due to this vulnerability, this species has been the focus of research, monitoring and management since the 1970’s. Recreational fishing for Marron was first licensed under the Amateur Fisherman’s licence …

Fisheries Research Report No. 349: South-West Freshwater Angling In Western Australia From 2000/01 – 2023/24: Estimates Of Participation, Effort And Catch, Aidan Long, Claire B. Smallwood, Karina L. Ryan, Eva Lai, Fabian I. Trinnie

Fisheries Research Reports

The South-west Freshwater Angling fishery (SWFA) in Western Australia is a licensed, low participation fishery primarily targeting the introduced Brown Trout (Salmo trutta) and Rainbow Trout (Oncorhynchus mykiss), which are stocked in popular dams and rivers across the region. Other licensed species include the introduced Redfin Perch (Perca fluviatilis) and the native Freshwater Cobbler (Tandanus bostocki). Freshwater angling is also managed by input and output control rules including gear regulations (one rod and line or handline with a small landing net), minimum size limits and a daily mixed freshwater species bag limit of 4 individuals (excluding Redfin Perch which has …

Draft Management Plan For The South Coast Scallop Managed Fishery, Department Of Primary Industries And Regional Development, Western Australia

Fisheries Management Papers

The Minister for Fisheries (Minister) intends to transition the South Coast Trawl Fishery (SCTF) to formal management by determining a management plan for the fishery in accordance with section 54(1) of the Fish Resources Management Act 1994 (FRMA).

Section 54(1) of FRMA provides for the Minister to determine by instrument in writing published in the Government Gazette, a management plan for a fishery. Not less than two months prior to determining a management plan, the Minister must, in accordance with section 64(2) of FRMA, prepare a draft of the plan and by notice in the Gazette, state their intent to …

Research Angler Program Newsletter: Recognition Of Two Decades Of The Research Angler Program, Department Of Primary Industries And Regional Development, Western Australia

Fisheries Research Reports

For over two-decades, volunteer recreational fishers have been diligently filling in angler logbooks as part of the Department of Primary Industries and Regional Development (DPIRD) Research Angler Program (RAP). The program, which began in 2004, was initially designed as a tool to enhance data collection for estuarine finfish in the West Coast Bioregion.

Throughout time, the program expanded to collect data on all species, habitat types and bioregions, generating community involvement all over the state. To date, fishers have reported data on over 19,000 fishing trips and more than 450 different fish and invertebrate (crustaceans and molluscs) species.

Fishers participating …

Informing Management Of American Shad (Alosa Sapidissima) In The Carolinas: Evaluating Novel Fish Passage Approaches And Acoustic Tracking Methods, Margaret Gaither

All Theses

Acoustic telemetry is a valuable tool for fisheries scientists to study the movements and migratory behaviors of aquatic organisms. A critical assumption of this method is that tagged fish exhibit similar behaviors and survival rates as their untagged counterparts. To investigate this, we conducted a 12-week laboratory study on adult American Shad (Alosa sapidissima) using gastroesophageal insertion of acoustic transmitters. We implanted 80 fish with dummy transmitters and monitored tag retention and survival. Our analysis, employing a mixed effects Cox’s proportional hazards model, revealed no significant differences in survival between tagged and control fish, regardless of sex. Additionally, …

Supplementation Of Commercial Probiotic Lactobacillus Casei In Rearing Early-Stage Silver Therapon (Leiopotherapon Plumbeus) Larvae: Effects On Growth, Body Composition, And Stress Tolerance, Frolan A. Aya, Reylan C. Gutierrez, Mark Joseph Reyes, Luis Maria B. Garcia

The Philippine Agricultural Scientist

Supplementation of probiotics in live feeds and rearing water may improve the growth, survival, and resistance of fish larvae. This study examined the beneficial effect of a commercial probiotic bacteria Lactobacillus casei on the growth, body composition, and stress resistance in early-stage silver therapon (Leiopotherapon plumbeus) larvae. Larvae at 12 d post-hatch (DPH) (9.76 ± 1.32 mm total length [TL] and 13.48 ± 4.80 mg body weight [BW]) were reared in triplicate groups of 15 larvae per tank from 12 – 40 DPH (Phase 1) and 41 – 96 DPH (Phase 2). From 12 – 40 DPH, larvae were fed …

Recreational Fishing For Western Rock Lobster: Estimates Of Participation, Effort And Catch In 2023/24, Claire B. Smallwood, Karina L. Ryan, Alissa C. Tate

Fisheries Research Reports

The Western Rock Lobster (WRL) (Panulirus cygnus) is the most commonly caught Rock Lobster (RL) species in Western Australia. Catches from the commercial and recreational sectors are required to determine and monitor Total Allowable Commercial Catch (TACC), Total Allowable Recreational Catch (TARC) and the proportion of Allowable Harvest Level (AHL) achieved. The TARC is set at 5% of the AHL and evaluated in the harvest strategy based on a 5-year average.

Data for the recreational sector are obtained using phone-recall surveys to provide annual estimates of participation, fishing effort and retained catch (by numbers) from recreational fishers who hold a …

Investigating Nekton Response To Changing Salinities In The Mississippi Sound: An Experimental And Statistical Approach, Adam Murray

Master's Theses

The Mississippi Sound provides nursery habitats for many coastal species and is recognized for its commercial fisheries. Previous freshening events linked to the Bonnet Carré Spillway, a Mississippi River flood diversion structure, proved catastrophic for oyster populations in the Mississippi Sound, but effects on mobile fish and shellfish species are not well-defined. The planned Mid-Breton Sediment Diversion (MBSD), an initiative to combat wetland loss, is also forecasted to lower salinities in the region, increasing the need to better understand responses of commercially and ecologically important species to freshening events. The objective of this study was to characterize effects of salinity …

Accounting For Post-Release Mortality In Data-Limited, Length-Based Assessments For Four Demersal Fish Species With Varying Life Histories, Brett Crisafulli, Sybrand A. Hesp, Ebenezer Afrifa-Yamoah, Ute A. Mueller, Karina L. Ryan, David V. Fairclough, Norman G. Hall, Johnny Lo

Fisheries Research Articles

Released (or discarded) fish from recreational and commercial line fisheries can experience significant levels of post-release mortality (PRM), affecting sustainability. Although PRM effects are often considered in data-rich (integrated model) assessments, this is uncommon in data-limited assessments. This study investigates impacts of PRM when applying data-limited, length-based assessment methods for four reef-dwelling demersal fish species in temperate Western Australia (Glaucosoma hebraicum, Chrysophrys auratus, Choerodon rubescens and Epinephelides armatus). These species differ considerably in their biology and susceptibility to PRM. For each species simulations were undertaken to (1) evaluate the reliability of a length-based catch curve (LBCC) …

Why Is Fish Welfare Still So Neglected?, Caroline M. Maia

Animal Sentience

Oldfield & Bonano (O&B) address an important problem in the field of fish welfare, one that calls for greater attention from scientists and practitioners. O&B show that fish welfare, particularly at the psychological level, is under-investigated. They focus mainly on zoos and aquaria, but their concerns extend also to other domains, including fish farming. Fish are sentient animals; priority should be given to their welfare in all environments where they are under human care.

Recreational Fishers’ Attitudes To Fisheries Management And Compliance, Karina L. Ryan, Clinton Syers, Kane Holtom, Timothy J. Green, Jeremy M. Lyle, Kate E. Stark, Sean R. Tracey

Fisheries Research Articles

Recreational fisheries policy decisions have social and ecological outcomes that depend on whether regulations are understood and meet expectations, which in turn enhances compliance. This study investigates perceptions of management and compliance among boat-based recreational fishers in Western Australia with consideration of demography (age, residence) and fishing behaviour (avidity, bioregion fished). Most respondents considered themselves to be informed about rules governing their fishing and there was strong support for current input and output controls, including area and seasonal closures and possession and size limits. There was less support for alternative regulations that are not currently in practice, such as annual …

Post-Harvest Processing Practices Of Small-Scale Fisherfolk From Rosario, Cavite, Philippines: Physicochemical And Microbiological Properties Of Tuyo, Abigail Ann Alano Ching, Myrna Benita Zamora Luna, Janice A. Ragaza

Biology Faculty Publications

Dried, salted fish (Sardinella spp.), locally known as tuyo, is a Filipino food staple. Pandawan fisherfolk consider tuyo processing as their main source of livelihood. This study determined the relation of post-harvest practices with the physicochemical and microbiological quality of tuyo. Tuyo processing involves receiving, washing, salting, rinsing, sun-drying, pressing, cooling, and packaging. Although the documented tuyo processing complied with the code of practice, processors needed to follow Good Manufacturing Practices. Moreover, tuyo had lower salt content (7.77-9.08 %NaCl), higher water activity (0.79-0.81), and aerobic plate count (7.82-8.36 log CFU/g) compared to national standards. Its yeast and mold count (3.58-3.66 …

A Decade Of Monitoring Reveals A Dynamic Fish Assemblage On A Substantial Artificial Reef In The Texas Gulf Of Mexico, David Hicks, Ethan T. Getz, Richard Kline, Carlos E. Cintra-Buenrostro

School of Earth, Environmental, & Marine Sciences Faculty Publications

Fish communities on artificial reefs have rarely been monitored over long periods to evaluate success of reef deployment. Here, we used roving diver surveys to assess changes in fish assemblages on a large, reefed vessel during 2008–2017. Multivariate analyses revealed a dynamic community that stabilized after 5 years. Species richness increased and species dominance decreased during 2008–2017. The fish community shifted toward reef-associated species such as hogfish and pufferfish. Species composition shifted, but trophic structure was relatively stable, which suggested that functional groups may not reflect larger community shifts. Our results indicate that fish communities on artificial reefs are temporally …

Effects Of Different Protein And Lipid Levels In Practical Diets For Yellowtail Snapper, Ocyurus Chrysurus (Bloch, 1971), Stephanie F. Velasquez, Leonardo Ibarra-Castro, Alexis Weldon, Donald Allen Davis

Biology Faculty Publications

Yellowtail snapper Ocyurus chrysurus has great potential as a production fish in aquaculture, yet there is very limited information on its nutritional requirements. To establish baseline data, two trials were conducted to evaluate the effects of dietary protein and lipid levels in practical diets on growth and protein retention. The first trial, conducted over 14 weeks, used a series of diets with varying levels of protein (36%, 40%, and 44%) and lipids (6%, 10%, and 14%). The second trial, conducted for 10 weeks, used a series of diets with 36% protein and scaled lipid levels (7%, 10%, 13%, and 16%). …

State Of The Fisheries: Status Reports Of The Fisheries And Aquatic Resources Of Western Australia 2023/24, Stephen J. Newman, Jenny Moore, Daniel J. Gaughan

Status Reports of the Fisheries and Aquatic Resources

This edition of the “State of the fisheries” continues the tradition of annually reporting on the status of exploited fish and their habitats in Western Australia. Critically, the reports provide overviews of the science outcomes that underpin management of fishing across the state.

Scientifically assessing the status of fish resources and potential impacts on ecosystems is inherently challenging; I acknowledge and thank the dedicated fisheries science teams and various support staff for again producing outstanding, robust scientific results that are summarised herein. I similarly acknowledge (i) the fisheries management team who use the science outcomes in policy development and to …

Analysis Of The Impact Of Mass On The International Regulatory Framework In The Example Of Unclos Terminology : Issues, Legal Challenges, Possible Solutions, Akbar Akbarov

World Maritime University Dissertations

No abstract provided.

Sea Blindness Or Sea Vision In Inland Waters : The State Of Maritime Domain Awareness In Lake Victoria-Kenya, Jacob Ogembo Odanga

World Maritime University Dissertations

No abstract provided.

Underwater Noise In Chilean Jurisdictional Waters : Critical Assessment Of National Legislation : Imo Instruments And International Regulations Implementation, Gonzalo Antonio Jiménez Briones

World Maritime University Dissertations

No abstract provided.

The Level Of Supply Chain Resilence Of The Nigerian Shipping Industry : A Perspective Of Major Stakeholders, Josephine Onyeka Offodile

World Maritime University Dissertations

No abstract provided.

New Hampshire Residents' Perceptions Of Aquaculture Show Opportunities For Education, Anna Maccaroni, Emily Whitmore, Lindsey Williams

Carsey Publications

In this brief, authors Anna Maccaroni, Emily Whitmore, and Lindsey Williams discuss the results of a June 2024 statewide survey of New Hampshire residents to understand their perceptions of aquaculture. Conducted by the University of New Hampshire’s Survey Center on behalf of New Hampshire Sea Grant, participants were asked about their opinion of aquaculture in New Hampshire, how much they have read or heard about aquaculture, whether they are aware of aquaculture activity in New Hampshire, and how frequently they consume seafood products. The authors report that the majority of New Hampshire residents are unfamiliar with aquaculture and are not …

Analyzing The Catfish And Trout Competitiveness Trends And Potential Trade Within The Us And Global Aquaculture Industry: A Gravity Model Approach, Diana Marisol Amaya Discua

LSU Master's Theses

The United States is one of the major seafood product importers in the world. Despite the increases in global seafood and aquaculture consumption over the past decades, there is limited information on the trade dynamics of this sector. To address this gap, this study uses an augmented gravity model to evaluate the factors that have influenced catfish and trout imports into the United States. The analysis was conducted using the Poisson Pseudo Maximum Likelihood (PPML) estimator to address issues of heteroskedasticity, autocorrelation, and zero trade flows. The results highlight the importance of Gross Domestic Product (GDP) and exchange rates in …

Applying Data-Limited Assessment Methods To Charter Logbook Length Data, Brett Crisafulli, Sybrand Alex Hesp, David Fairclough, Emily A. Fisher, Paul D. Lewis, Jeffrey V. Norriss, Corey B. Wakefield, Fabian Trinnie, Stephen J. Newman

Fisheries Research Reports

Marine waters along the Western Australian coastline are characterised by low ecosystem productivity and high species diversity of fishes. With over 3,000 known species comprising estuarine, nearshore, demersal and pelagic fishes in the region, many contribute to important commercial and recreational fisheries (Lenanton et al. 1991; Molony et al. 2011; Newman et al. 2018). As it is logistically and economically infeasible to conduct intensive monitoring and high-level stock assessments of all exploited fish species in Western Australia, indicator species are used to assess the sustainability of suites of species of biological and ecological similarity, for optimal use of available resources …