Open Access. Powered by Scholars. Published by Universities.®

Marine Biology Commons™

Open Access. Powered by Scholars. Published by Universities.®

2021

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 331 - 359 of 359

Full-Text Articles in Marine Biology

Assessing The Significance Of Substrate Color And Temperature On Balanus Glandula Growth And Survivorship, Nhi Phan Jan 2021

Assessing The Significance Of Substrate Color And Temperature On Balanus Glandula Growth And Survivorship, Nhi Phan

CMC Senior Theses

The body temperatures of intertidal species are strongly dependent on the temperature of their external environment. This study sought to understand the impact of a substrate’s color and subsequent temperature on Balanus glandula in order to predict the potential effects of warming temperatures from climate change on intertidal species. Barnacles were allowed to settle and grow on three differently colored plates and were photographically monitored over the course of eleven weeks. Settlement and survivorship were recorded on-site, while growth was tracked utilizing digital imaging software. It was hypothesized that barnacles on peach plates would perform the best since the ambient …

Go to article

Analyzing The Potential Of Bioelectrical Impedance Analysis In Identifying The Effects Of Freezing In Atlantic Sea Scallop Products (Placopecten Magellanicus), Joseph Ehrhard Jan 2021

Analyzing The Potential Of Bioelectrical Impedance Analysis In Identifying The Effects Of Freezing In Atlantic Sea Scallop Products (Placopecten Magellanicus), Joseph Ehrhard

All Theses And Dissertations

The sensitivity of bioelectrical impedance analysis (BIA) was investigated to assess the potential of identifying the effects of freezing in market-ready Atlantic sea scallops (Placopecten magellanicus). Measurements of resistance (R) and reactance (Xc) were recorded using a Certified Quality Reader (CQR) (Certified Quality Food Inc., Clinton Township, MI 48035) BIA device at 50kHz. Prior to investigating the effects of freezing on BIA measurements a standard operating procedure (SOP) was established to limit sources of error. BIA measurements were used in establishing an SOP which focused upon the preparation of samples through blot drying, as well as, proper orientation …

Go to article

Response Of Coastal Ichthyoplankton Assemblages Off Northern California To Seasonal Oceanographic And Climate Variability, Blair M. Winnacott Jan 2021

Response Of Coastal Ichthyoplankton Assemblages Off Northern California To Seasonal Oceanographic And Climate Variability, Blair M. Winnacott

Cal Poly Humboldt theses and projects

This study analyzed samples collected along the Trinidad Head Line (41°N) to characterize variability in the ichthyoplankton assemblage in coastal waters off northern California from late 2007 through 2019, a period during which a major marine heatwave (MHW; late 2014-16) strongly perturbed the ecosystem. I augmented visual identification with genetic techniques to resolve the species composition of visually cryptic larval rockfishes (Sebastes spp.). While taxonomic composition off northern California was largely similar to studies off Oregon and Washington, and cross-shelf structure and seasonal patterns in species’ abundance were generally consistent with the distribution and phenology of parental stocks, interannual …

Go to article

Evaluating The Impacts Of Dam Construction And Longshore Transport Upon Modern Sedimentation Within The Rio Grande Delta (Texas, U.S.A.), Samantha Moore, Elizabeth A. Heise, Marty Grove, Anthony Reisinger, Jude A. Benavides Jan 2021

Evaluating The Impacts Of Dam Construction And Longshore Transport Upon Modern Sedimentation Within The Rio Grande Delta (Texas, U.S.A.), Samantha Moore, Elizabeth A. Heise, Marty Grove, Anthony Reisinger, Jude A. Benavides

School of Earth, Environmental, & Marine Sciences Faculty Publications

The modern Rio Grande delta system has experienced a century of dam construction, water removal for irrigation and municipal use, and land use modifications that have dramatically reduced its sediment load. This study examines whether damming has sufficiently limited delivery of upstream sediment to permit locally eroded sources and/or littoral transport along the coast to influence the provenance signal of the Rio Grande delta. Changes in sediment provenance within the Rio Grande’s delta can be detected and quantified by measurement of detrital zircon Uranium–lead dating age distributions. Previous provenance studies indicate that modern Rio Grande river sand upstream of Falcon …

Go to article

Importance Of Low-Relief Nursery Habitat For Reef Fishes, Michael A. Dance, Ray R. Rooker, Richard Kline, Antonietta Quigg, Gregory R. Stunz, R. J. David Wells, Kirsten Lara, Jessica Lee, Bobbie Suarez Jan 2021

Importance Of Low-Relief Nursery Habitat For Reef Fishes, Michael A. Dance, Ray R. Rooker, Richard Kline, Antonietta Quigg, Gregory R. Stunz, R. J. David Wells, Kirsten Lara, Jessica Lee, Bobbie Suarez

School of Earth, Environmental, & Marine Sciences Faculty Publications

Coastal restoration projects to mitigate environmental impacts have increased global demand for sand resources. Unfortunately, these resources are often extracted from sand/shell banks on the inner continental shelf, resulting in significant alteration or loss of low-relief reefs in coastal oceans. Experimental reefs (oyster shell, limestone rubble, composite) were deployed in the western Gulf of Mexico to assess their potential value as nurseries for newly settled reef fishes. Occurrence, abundance, and species richness of juvenile fishes were significantly higher on all three types of low-relief reefs compared with unconsolidated sediment. Moreover, reefs served as nursery habitat for a range of reef …

Go to article

The Relative Contribution Of The Blue Crab (Callinectes Sapidus) To Periwinkle Snail (Littoraria Irrorata) Predation Mortality In The Lower Salt Marsh Intertidal Of Northeast Florida, Amanda Paige Small Jan 2021

The Relative Contribution Of The Blue Crab (Callinectes Sapidus) To Periwinkle Snail (Littoraria Irrorata) Predation Mortality In The Lower Salt Marsh Intertidal Of Northeast Florida, Amanda Paige Small

UNF Graduate Theses and Dissertations

In top-down regulation of ecological communities, predation of grazers is critical for maintaining the presence and growth of essential vegetation. The periwinkle snail (Littoraria irrorata) is a ubiquitous grazer in Atlantic salt marshes that can defoliate patches of Spartina alterniflora when populations are extremely dense. On the east coast of Florida, multiple predators could contribute to periwinkle population control maintaining this critical habitat. This study aimed to determine if the blue crab (Callinectes sapidus) is the primary predator of periwinkle snails in the salt marsh lower intertidal. Tethering was utilized to assess if periwinkle mortality is …

Go to article

Benthic Microalgae Response To A Warming Climate And Shift In Foundational Vegetation Species In A Saltmarsh-Mangrove Ecotone, Gabriela Canas Jan 2021

Benthic Microalgae Response To A Warming Climate And Shift In Foundational Vegetation Species In A Saltmarsh-Mangrove Ecotone, Gabriela Canas

UNF Graduate Theses and Dissertations

The ecotone in Northeast Florida is experiencing rapid change as mangroves begin to encroach northward into saltmarsh dominated coastal wetlands. This is especially prevalent within the boundaries of the Guana Tolomato Matanzas National Estuarine Research Reserve where studies are attempting to understand the consequences of more mangroves. Although we are beginning to understand some of the implications of this shift in dominant vegetation, the true effects and the accompanying sustained climatic warming effects on the resilience of wetland habitats and their associated communities remains unknown. Primary producers such as benthic microalgae (BMA) are important food sources in both mangrove and …

Go to article

Reproductive Biology Of The Spinner Shark Carcharhinus Brevipinna, Off The Southeast U.S. Coast, Kristin K. Palmrose Jan 2021

Reproductive Biology Of The Spinner Shark Carcharhinus Brevipinna, Off The Southeast U.S. Coast, Kristin K. Palmrose

UNF Graduate Theses and Dissertations

The spinner shark, Carcharhinus brevipinna, is a large coastal shark species that is common on the U.S. southeast coast and caught in both commercial and recreational fisheries. Little research has been conducted on the life history of C. brevipinna in the Northwestern Atlantic, presenting challenges for fishery management. This is especially true for reproductive biology, warranting a need to determine how rapidly individuals are reproducing and contributing to the population. This study aimed to characterize reproduction in C. brevipinna by determining size-at-maturity, reproductive seasonality, periodicity, and fecundity. This was accomplished by analyzing changes in reproductive tract morphology and histology, …

Go to article

The Role Of Symbiotic Algae In The Acclimatization Of Oculina Arbuscula To Ocean Acidification, Erin M. Arneson Jan 2021

The Role Of Symbiotic Algae In The Acclimatization Of Oculina Arbuscula To Ocean Acidification, Erin M. Arneson

College of Graduate Studies: Theses & Dissertations

Ocean acidification (OA) caused by CO2 emissions is projected to decrease seawater pH to 7.6 by 2100. Scleractinian corals are at risk because excess H+ in seawater binds to carbonate (CO32-), reducing its availability for CaCO3 skeletons. The energy demand for skeletal growth increases as pH decreases because corals must actively purge excess H+ from their seawater sourced calcifying fluid to maintain high calcification rates. In scleractinian corals it is hypothesized that photosynthesis by symbiotic algae is critical to meet this increased energy demand. To test this hypothesis, I conducted laboratory and field …

Go to article

Oldest Indo-Pacific Lionfish (Pterois Volitans/P. Miles) Recorded From The Northwestern Gulf Of Mexico, Raven D. Blakeway, Alexander Q. Fogg, Glenn A. Jones Jan 2021

Oldest Indo-Pacific Lionfish (Pterois Volitans/P. Miles) Recorded From The Northwestern Gulf Of Mexico, Raven D. Blakeway, Alexander Q. Fogg, Glenn A. Jones

Gulf and Caribbean Research

Indo-Pacific lionfish (Pterois volitans/miles) were first detected off the coast of Florida in the 1980s, with aquaria release being the most likely mechanism for introduction. Since then, lionfish have proliferated through the Western Atlantic Ocean, Caribbean Sea, and Gulf of Mexico (GOM). Here, we report the oldest lionfish aged on record in the Western Atlantic, removed from Flower Garden Banks National Marine Sanctuary (FGBNMS) in the GOM. In August 2018, a research expedition removed 745 lionfish from FGBNMS, of which a subset were retained for age and growth estimation. The oldest lionfish was a 10 y old male, …

Go to article

Review: Formation And Metabolic Function Of Coral Rubble Biofilms In The Reef Ecosystem, Andres Sanchez-Quinto, Luisa I. Falcon Jan 2021

Review: Formation And Metabolic Function Of Coral Rubble Biofilms In The Reef Ecosystem, Andres Sanchez-Quinto, Luisa I. Falcon

Gulf and Caribbean Research

When coral dies, their calcareous skeletons constitute coral rubble in conjunction with the cementing activity of coralline algae and bacteria, creating a secondary reef structure which takes from years to decades to form. Healthy coral reefs differ from coral—rubble dominated reefs in microbial taxonomic composition and metabolic functional roles. The metabolisms of healthy reefs are dominated by autotrophic pathways, where carbon and nitrogen fixation dominate, while the metabolism of rubble—dominated reefs predominate in degradation of organic matter. Nitrogen fixation is 3 orders of magnitude lower in rubble—dominated reefs than in healthy reefs. Coral—rubble harbors a vast diversity of microbes that …

Go to article

Avian Biodiversity Of The Indian River Lagoon System, Florida, Richard L. Turner Jan 2021

Avian Biodiversity Of The Indian River Lagoon System, Florida, Richard L. Turner

Ocean Engineering and Marine Sciences Faculty Publications

Despite claims about high avian biodiversity in the Indian River Lagoon system, previous efforts to inventory the birds have been limited in geographic extent or in habitat. Compilation of a list of birds could rely on many resources, but ones of widespread availability, greatest historical record, and highest density of sites are two citizen-science projects: the Christmas Bird Count (CBC) and eBird. Lists of species were harvested from 17 CBC sites (‘‘circles’’) back to 1910 and from 432 eBird sites (‘‘hotspots’’) since 2002 within the boundaries of the Indian River Lagoon National Estuary Program (IRLNEP). In addition to lagoon waters, …

Go to article

Biodiversity Of The Indian River Lagoon System: A Cautionary Tale From The Birds, Richard L. Turner Jan 2021

Biodiversity Of The Indian River Lagoon System: A Cautionary Tale From The Birds, Richard L. Turner

Ocean Engineering and Marine Sciences Faculty Publications

Prevailing dogma on comparative biodiversity of the Indian River Lagoon (IRL) stems mainly from one claim about ichthyofauna and two about avifauna. The extensive network of birdwatchers, clarity of bird taxonomy, long history of the Christmas Bird Count (CBC), and burgeoning database on ebird.org make birds excellent for geographic comparison. The 1985 claim that Merritt Island CBCs are often the ‘‘most speciose count’’ in the U.S. is unfounded. CBCs there in 1970–1985 never had the highest count, even compared to the nearby Cocoa site. For the 114th CBC (2013), it ranked 11th in Florida and 44th nationally. The 1989 claim …

Go to article

First Record Of Blacknape Large-Eye Bream Gymnocranius Satoi (Perciformes: Lethrinidae) In The Philippines, Nicko Amor Flores, Jade Tifany Rey, Jeffrey T. Williams, Kent Carpenter, Mudjekeewis Santos Jan 2021

First Record Of Blacknape Large-Eye Bream Gymnocranius Satoi (Perciformes: Lethrinidae) In The Philippines, Nicko Amor Flores, Jade Tifany Rey, Jeffrey T. Williams, Kent Carpenter, Mudjekeewis Santos

Biological Sciences Faculty Publications

The Philippines has been regarded as the center of the center of marine shorefish biodiversity, having the highest number of fish species per square area in the world. The blacknape large-eye bream, Gymnocranius satoi, has been reported to occur from Southern Japan, Taiwan to Northwestern Australia and to the Coral Sea, but has not previously been recorded from the Philippines. From 2011 – 2019, the National Fisheries Research and Development Institute (NFRDI) collaborated with the National Museum of Natural History of the Smithsonian Institution (NMNH/SI), USA, and the Old Dominion University (ODU), Virgina, USA, to inventory all commercial fish …

Go to article

Mercury And Selenium In Fishes From The Gulf Of Thailand:Balancing Consumption Risk, Irwan Ramadhan Ritonga Jan 2021

Mercury And Selenium In Fishes From The Gulf Of Thailand:Balancing Consumption Risk, Irwan Ramadhan Ritonga

Chulalongkorn University Theses and Dissertations (Chula ETD)

Consumption of marine fish, a high protein source, has been hampered by mercury (Hg) contamination. To date, selenium (Se), a co-occurrence element, has been perceived to reduce Hg toxicity. Health risk of Hg exposure via fish consumption might be re-estimated using Se-Hg connection. Total Hg (T-Hg) contamination in seafood was investigated in 60 individual (22, 4 and 6 species of fish, cephalopods and shellfish, respectively) purchased from two supermarkets in Bangkok and in 622 individuals (total 27 fish species) caught by bottom trawling from 63 stations in the Gulf Thailand (GoT). Se-Hg connection was studied in 19 selected fish species …

Go to article

Venom Characterization And Toxicology Of Box Jellyfish Chironex Indrasaksajiae, Chanikarn Yongstar Jan 2021

Venom Characterization And Toxicology Of Box Jellyfish Chironex Indrasaksajiae, Chanikarn Yongstar

Chulalongkorn University Theses and Dissertations (Chula ETD)

Box jellyfish is considered one of the most venomous animals. The genus Chironex (C. indrasaksajiae) is a multi-tentacle box jellyfish found in Thai waters that are dangerous to humans, particularly the venom that could cause death within minutes. This study aimed to perform a proteomic approach to characterize the protein components of C. indrasaksajiae venom. A total of 532 unique protein groups were identified, including toxins and proteins essential for nematocyte development and nematocyst formation (nematogenesis). Toxins CfTX-1 and CfTX-2, with sequence coverage of 39.3 percent and 34.8 percent, respectively, are the most abundant in the venom of C. indrasaksajiae. …

Go to article

การศึกษาความสัมพันธ์ของกำลังการผลิตขั้นต้นและความผันแปรของสารอาหารบริเวณปากแม่น้ำและอ่าวไทยตอนใน, เจริญลักษณ์ สุชาติพงษ์ Jan 2021

การศึกษาความสัมพันธ์ของกำลังการผลิตขั้นต้นและความผันแปรของสารอาหารบริเวณปากแม่น้ำและอ่าวไทยตอนใน, เจริญลักษณ์ สุชาติพงษ์

Chulalongkorn University Theses and Dissertations (Chula ETD)

บริเวณอ่าวไทยตอนในเป็นเอสทูรีขนาดใหญ่ ซึ่งรับน้ำจืดมาจากแม่น้ำ 4 สายหลัก คือ แม่น้ำแม่กลอง แม่น้ำท่าจีน แม่น้ำเจ้าพระยา และแม่น้ำบางปะกง จึงทำให้บริเวณอ่าวไทยตอนในเป็นถิ่นที่อยู่อาศัย แหล่งอาหาร และที่หลบภัย ของสัตว์ทะเล ซึ่งมีคุณค่าทางเศรษฐกิจ ทำให้ผู้วิจัยมีความสนใจในการศึกษากำลังการผลิตขั้นต้นของแพลงก์ตอนพืชบริเวณดังกล่าว ด้วยวิธีคาร์บอน-13 ของขวดมืดและขวดสว่าง พบว่า ปริมาณกำลังการผลิตขั้นต้นของแพลงก์ตอนพืชบริเวณปากแม่น้ำ ในฤดูมรสุมตะวันตกเฉียงใต้ (30 พฤษภาคม-14 มิถุนายน พ.ศ. 2562) และฤดูมรสุมตะวันออกเฉียงเหนือ (25 ตุลาคม-19 พฤศจิกายน พ.ศ. 2562) มีค่าอยู่ในช่วง 0.05-11.37 และ 0.02-3.07 มิลลิกรัมคาร์บอนต่อลูกบาศก์เมตรต่อชั่วโมง และบริเวณอ่าวไทยตอนใน ฤดูมรสุมตะวันตกเฉียงใต้ (9-12 ตุลาคม พ.ศ. 2562) และช่วงเปลี่ยนฤดูมรสุม (8-12 มีนาคม พ.ศ.2563) มีค่าอยู่ในช่วง 0.15-5.15 และ 0.30-10.09 มิลลิกรัมคาร์บอนต่อลูกบาศก์เมตรต่อชั่วโมง ตามลำดับ เนื่องจากผู้วิจัยมีความสนใจที่จะศึกษากำลังการผลิตขั้นต้นของแพลงก์ตอนพืชต่างขนาด จึงได้ทำการศึกษากำลังการผลิตขั้นต้นของแพลงก์ตอนพืชต่างขนาด 2 ชนิด ในห้องปฏิบัติการ คือ ไมโครแพลงก์ตอนพืช Chattonella sp. และนาโนแพลงก์ตอนพืช Isochrysis sp. ด้วยวิธีวัดปริมาณออกซิเจนละลายของขวดมืดและขวดสว่าง โดยเพาะเลี้ยงแพลงก์ตอนพืชทั้งสองชนิด ในสภาวะเลี้ยงเดี่ยว ด้วยอาหารสูตร T1 ที่ความเข้มข้น 100% และสภาวะเลี้ยงรวม ด้วยอาหารสูตร T1 ที่ความเข้มข้น 100% 50% และ 1% พบว่า (1) ความเข้มข้นของสารอาหาร ส่งผลต่อจำนวนเซลล์ ขนาดเซลล์ กำลังการผลิตขั้นต้น ปริมาณคลอโรฟิลล์เอ และช่วงชีวิต (2) นาโนแพลงก์ตอนพืชในสภาวะเลี้ยงรวม มีกำลังการผลิตขั้นต้นสูงกว่าในสภาวะเลี้ยงเดี่ยวมาก เนื่องจากมีการปรับลดจำนวนเซลล์และขนาดเซลล์ แต่เพิ่มปริมาณคลอโรฟิลล์เอ นอกจากนี้ นาโนแพลงก์ตอนพืชยังมีการปรับระยะเวลาที่ค่าประสิทธิภาพกำลังการผลิตขั้นต้นต่อหน่วยคลอโรฟิลล์เอ (PP/Chl a) สูง ให้ยาวขึ้น และปรับปริมาณคลอโรฟิลล์เอต่อเซลล์ (Chl …

Go to article

Response Of Fish And Invertebrate Larvae To Backreef Sounds At Varying Distances: Implications For Habitat Restoration, Emily R. Anderson, Jack Butler, Mark J. Butler Jan 2021

Response Of Fish And Invertebrate Larvae To Backreef Sounds At Varying Distances: Implications For Habitat Restoration, Emily R. Anderson, Jack Butler, Mark J. Butler

Biological Sciences Faculty Publications

Underwater sound is used by many marine larvae to orient to coastal habitats including backreef, sponge-dominated hardbottom habitat in the Florida Keys (FL, United States)—a particularly “noisy” coastal habitat. However, the distance over which acoustic cues are attractive to settlement-stage larvae is generally unknown. We examined this phenomenon in a region of the Florida Keys where mass sponge die-offs have diminished both underwater soundscapes and larval settlement. The absence of pronounced hardbottom-associated sound over such a large area allowed us to experimentally test in situ the response of fish and invertebrate larvae to broadcasted sounds at different distances from their …

Go to article

Contrasting Heat Stress Response Patterns Of Coral Holobionts Across The Red Sea Suggest Distinct Mechanisms Of Thermal Tolerance, Christian R. Voolstra, Jacob J. Valenzuela, Serdar Turkarslan, Anny Cárdenas, Benjamin C.C. Hume, Gabriela Perna, Carol Buitrago-López, Katherine Rowe, Monica V. Orellana, Nitin S. Baliga, Suman Paranjape, Guilhem Banc-Prandi, Jessica Bellworthy, Moaz Fine, Sarah Frias-Torres, Daniel J. Barshis Jan 2021

Contrasting Heat Stress Response Patterns Of Coral Holobionts Across The Red Sea Suggest Distinct Mechanisms Of Thermal Tolerance, Christian R. Voolstra, Jacob J. Valenzuela, Serdar Turkarslan, Anny Cárdenas, Benjamin C.C. Hume, Gabriela Perna, Carol Buitrago-López, Katherine Rowe, Monica V. Orellana, Nitin S. Baliga, Suman Paranjape, Guilhem Banc-Prandi, Jessica Bellworthy, Moaz Fine, Sarah Frias-Torres, Daniel J. Barshis

Biological Sciences Faculty Publications

Corals from the northern Red Sea, in particular the Gulf of Aqaba (GoA), have exceptionally high bleaching thresholds approaching >5℃ above their maximum monthly mean (MMM) temperatures. These elevated thresholds are thought to be due to historical selection, as corals passed through the warmer Southern Red Sea during recolonization from the Arabian Sea. To test this hypothesis, we determined thermal tolerance thresholds of GoA versus central Red Sea (CRS) Stylophora pistillata corals using multi-temperature acute thermal stress assays to determine thermal thresholds. Relative thermal thresholds of GoA and CRS corals were indeed similar and exceptionally high (~7℃ above MMM). However, …

Go to article

The Conservation Status Of Marine Biodiversity Of The Western Indian Ocean, R. Bullock, Gina Ralph, E. Stump, F. Al Abdali, J. Al Asfoor, B. Al Buwaiqi, A. Al Kindi, A. Ambuali, Tiffany Birge, P. Borsa, F. Di Dario, B. Everett, S. Fennessy, C. Fonseca, Claire Gorman, A. Govender, H. Ho, W. Holleman, N. Jiddawi, M. Khan, H. Larson, Christi Linardich, P. Matiku, K. Matsuura, C. Maunde, H. Motomura, T. Munroe, R. Nair, C. Obota, B. Polidoro, B. Russell, S. Shaheen, Y. Sithole, W. Smith-Vaniz, F. Uiblein, S. Weerts, A. Williams, S. Yahya, Kent Carpenter Jan 2021

The Conservation Status Of Marine Biodiversity Of The Western Indian Ocean, R. Bullock, Gina Ralph, E. Stump, F. Al Abdali, J. Al Asfoor, B. Al Buwaiqi, A. Al Kindi, A. Ambuali, Tiffany Birge, P. Borsa, F. Di Dario, B. Everett, S. Fennessy, C. Fonseca, Claire Gorman, A. Govender, H. Ho, W. Holleman, N. Jiddawi, M. Khan, H. Larson, Christi Linardich, P. Matiku, K. Matsuura, C. Maunde, H. Motomura, T. Munroe, R. Nair, C. Obota, B. Polidoro, B. Russell, S. Shaheen, Y. Sithole, W. Smith-Vaniz, F. Uiblein, S. Weerts, A. Williams, S. Yahya, Kent Carpenter

Biological Sciences Faculty Publications

The Western Indian Ocean (WIO) is comprised of productive and highly diverse marine ecosystems that are rich sources of food security, livelihoods, and natural wonder. The ecological services that species provide are vital to the productivity of these ecosystems and healthy biodiversity is essential for the continued support of economies and local users. The stability of these valuable resources, however, is being eroded by growing threats to marine life from overexploitation, habitat degradation and climate change, all of which are causing serious reductions in marine ecosystem services and the ability of these ecosystems to support human communities. Quantifying the impacts …

Go to article

Status Reports Of The Fisheries And Aquatic Resources Of Western Australia 2020/21, S.J. Newman, B.S. Wise, K.G. Santoro, D.J. Gaughan Jan 2021

Status Reports Of The Fisheries And Aquatic Resources Of Western Australia 2020/21, S.J. Newman, B.S. Wise, K.G. Santoro, D.J. Gaughan

Status Reports of the Fisheries and Aquatic Resources

The Status Reports of the Fisheries and Aquatic Resources of Western Australia (SRFAR) provide an annual update on the state of the fish stocks and other aquatic resources of Western Australia (WA). These reports outline the most recent assessments of the cumulative risk status for each of the aquatic resources (assets) within WA’s six Bioregions using an Ecosystem Based Fisheries Management (EBFM) approach. The Departments’ risk based EBFM framework is the State government’s basis for management of all Western Australia’s aquatic resources.

Go to article

Resource Characterization And Utilization Of Lepironia Articulata (Retz.) Domin At Kg. Beris Tok Kuand Kg. Beting Lintang, Terengganu, Shoma Tani Jan 2021

Resource Characterization And Utilization Of Lepironia Articulata (Retz.) Domin At Kg. Beris Tok Kuand Kg. Beting Lintang, Terengganu, Shoma Tani

Student Works (2020-2029)

This research focused on how handicrafts could contribute to sustainable community development with natural resource management. This research aims to characterize Lepironia articulata as a resource by taxonomy and distribution patterns, examine its utilization through group and semi-structured interviews with ten local residents who got involved in handicraft productions at two selected villages in Setiu Wetlands of Terengganu state and identify their capacity development opportunities by following a guideline provided by United Nations Development Programme. This research clarified that the height of Lepironia articulata in Setiu Wetlands was shorter than the records of the other description and the other site …

Go to article

Lipid Metabolites As Energy Stores In Four Stingray Species, Lauren Moniz Jan 2021

Lipid Metabolites As Energy Stores In Four Stingray Species, Lauren Moniz

College of Graduate Studies: Theses & Dissertations

Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty acids (FFA) are important lipids that are obtained from diet and integrate into tissues. They are representative of energy stores and potential energy available for metabolic processes. In marine ecosystems, stingrays occupy the mesopredator niche, facilitating nutrient transfer from lower to higher trophic positions. Stingrays consume a variety of prey items ranging in lipid content, but how lipid metabolites …

Go to article

Journal Of Ecology 2021 Global Rainfall-Seagrass Resilience-Swan River, Chanelle L. Webster, Kathryn M. Mcmahon, Paul S. Lavery, Simone Strydom, Marta Sánchez Alarcón, Kieryn L. Kilminster, Katherine Bennet, Sian Mcnamara Jan 2021

Journal Of Ecology 2021 Global Rainfall-Seagrass Resilience-Swan River, Chanelle L. Webster, Kathryn M. Mcmahon, Paul S. Lavery, Simone Strydom, Marta Sánchez Alarcón, Kieryn L. Kilminster, Katherine Bennet, Sian Mcnamara

Research Datasets

The excel file contains: summary of daily maximum precipitation from global rainfall analysis, monthly change in seagrass indicators (biomass, leaf density etc); water quality data including salinity, temperature and light data. There are also .nc files containing precipitation data from 1979-2019.

Go to article

Supplementary Table 11: Regional Zotu Table (Data As Relative Abundances), Charlie M. Phelps, Kathryn Mcmahon, Andrew Bissett, Rachele Bernasconi, Peter D. Steinberg, Torsten Thomas, Ezequiel M. Marzinelli, Megan J. Huggett Jan 2021

Supplementary Table 11: Regional Zotu Table (Data As Relative Abundances), Charlie M. Phelps, Kathryn Mcmahon, Andrew Bissett, Rachele Bernasconi, Peter D. Steinberg, Torsten Thomas, Ezequiel M. Marzinelli, Megan J. Huggett

Research Datasets

This zOTU table is the relative abundances for the whole regional (combined WA and NSW) dataset.

Go to article

Effect Of Seawater Ageing On Fracture Toughness Of Stitched Glass Fiber/Epoxy Laminates For Marine Applications, Atizaz Hassan, Rafiullah Khan, Numan Khan, Muhammad Aamir, Danil Y. Pimenov, Khaled Giasin Jan 2021

Effect Of Seawater Ageing On Fracture Toughness Of Stitched Glass Fiber/Epoxy Laminates For Marine Applications, Atizaz Hassan, Rafiullah Khan, Numan Khan, Muhammad Aamir, Danil Y. Pimenov, Khaled Giasin

Research outputs 2014 to 2021

Composite materials are used in various industries such as marine, aircraft, automotive, etc. In marine applications, composites are exposed to seawater, which can affect their mechanical properties due to moisture absorption. This work focuses on the durability of composite materials under the short-term effect of seawater ageing. The specimens were prepared from glass fiber/epoxy using a hand lap-up method and stitched in the z-direction with Kevlar fiber. The specimens were submerged in seawater for 24 and 35 days. A significant decrease in maximum load was found as specimen immersion time in seawater increased. The seawater ageing also affected fracture toughness …

Go to article

What Lies Beneath: Predicting Seagrass Below-Ground Biomass From Above-Ground Biomass, Environmental Conditions And Seagrass Community Composition, C. J. Collier, L. M. Langlois, Kathryn M. Mcmahon, J. Udy, M. Rasheed, E. Lawrence, A. B. Carter, M. W. Fraser, L. J. Mckenzie Jan 2021

What Lies Beneath: Predicting Seagrass Below-Ground Biomass From Above-Ground Biomass, Environmental Conditions And Seagrass Community Composition, C. J. Collier, L. M. Langlois, Kathryn M. Mcmahon, J. Udy, M. Rasheed, E. Lawrence, A. B. Carter, M. W. Fraser, L. J. Mckenzie

Research outputs 2014 to 2021

© 2020 Seagrass condition, resilience and ecosystem services are affected by the below-ground tissues (BGr) but these are rarely monitored. In this study we compiled historical data across northern Australia to investigate biomass allocation strategies in 13 tropical seagrass species. There was sufficient data to undertake statistical analysis for five species: Cymodocea serrulata, Halophila ovalis, Halodule uninervis, Thalassia hemprichii, and Zostera muelleri. The response of below-ground biomass (BGr) to above-ground biomass (AGr) and other environmental and seagrass community composition predictor variables were assessed using Generalized Linear Models. Environmental data included: region, season, sediment type, water depth, proximity to land-based sources …

Go to article

Accounting For The Influence Of Temperature And Location When Predicting Seagrass (Halophila Ovalis) Photosynthetic Performance, Nicole E. Said, Kathryn Mcmahon, Paul Lavery Jan 2021

Accounting For The Influence Of Temperature And Location When Predicting Seagrass (Halophila Ovalis) Photosynthetic Performance, Nicole E. Said, Kathryn Mcmahon, Paul Lavery

Research outputs 2014 to 2021

We show that the effect of temperature on photosynthesis of a widely distributed and ecological important seagrass species was not consistent among locations, with some evidence of acclimation to the local temperature range. This has important implications for modelling seagrass productivity and the impacts of light reduction on seagrass ecosystems. Reduced light availability is one of the main pressures negatively impacting on seagrass meadows worldwide. Our knowledge of seagrass photosynthetic characteristics is critical to predicting and managing impacts of light reducing activities but suffers from two critical information gaps: first, data is overwhelmingly derived from studies of leaf tissue and …

Go to article

Environmental Gradients And Physical Barriers Drive The Basin-Wide Spatial Structuring Of Mediterranean Sea And Adjacent Eastern Atlantic Ocean Prokaryotic Communities, Marta Sebastián, Eva Ortega-Retuerta, Laura Gómez-Consarnau, Marina Zamanillo, Marta Álvarez, Javier Arístegui, Josep M. Gasol Jan 2021

Environmental Gradients And Physical Barriers Drive The Basin-Wide Spatial Structuring Of Mediterranean Sea And Adjacent Eastern Atlantic Ocean Prokaryotic Communities, Marta Sebastián, Eva Ortega-Retuerta, Laura Gómez-Consarnau, Marina Zamanillo, Marta Álvarez, Javier Arístegui, Josep M. Gasol

Research outputs 2014 to 2021

The Mediterranean Sea is a miniature ocean divided by the Sicily Strait into two basins with a marked west to east trophic gradient and separated of the nearby eastern Atlantic Ocean by the Strait of Gibraltar. Here, we test the hypothesis that these physical and environmental barriers favor the development of specific prokaryotic assemblages, leading to changes in community structure both in the vertical and horizontal spatial scales. By analyzing taxonomic and phylogenetic diversity using amplicon sequence variants (ASVs) of the 16S rRNA gene, we show that there is indeed marked vertical segregation of prokaryotic groups, similar to that found …

Go to article

First Prev