Marine Biology Commons^™

Fish Diversity And Coral Health Of Tanzania's Reefs: A Comparative Study Between The Ushongo Village Reef And The Fungu Zinga Reef Over Time, Della Turque, Corinne Casper

Independent Study Project (ISP) Collection

The world’s oceans are becoming increasing acidic due to global climate change, posing a threat to marine ecosystems, including coral carbonate systems. Environmental threats are exacerbated by human development stressors as well: growing populations, dependency on marine resources, and unsustainable practices invaluable marine ecosystems at risk. Tanzania’s coral reef system extends for 3580 km2 (Muhando et al. 2008) near the Tanga region, serving over half a million people who are highly dependent on fishing and other marine resources as their livelihoods (Samoilys et. al. 2008). With Tanzania’s population rapidly growing, the unsustainable pressure on coral reefs for sustenance and livelihood …

A Study Of Defensive Mechanisms Employed By Two Species Of Nudibranchs Using Toxicity And Unpalatability Analyses, Sean Youn

Independent Study Project (ISP) Collection

Nudibranchs are marine invertebrates that have developed an intriguing defense mechanism, including warning coloration and the use of chemicals accumulated through their sponge diet. The goal of this study was to determine whether the strength of chemical defenses differs between dietary and accumulated secondary metabolites for two species: Glossodoris vespa and Ceratosoma brevicaudatum. First, NMR spectroscopy was used to not only identify specific compounds in the mantle (outer covering) and the viscera (gut) but also to analyze the possibility of nudibranch species transporting more toxic compounds for defensive purposes. Next, toxicity (brine shrimp) and palatability (Palaemon shrimp) assays …

The Effects Of Sub-Lethal Predation On The Reproductive Output Of Acanthaster Planci (Crown-Of-Thorns Starfish), Emily Mucha

Independent Study Project (ISP) Collection

Wide-scale declines in live coral cover have been observed throughout history. Modern day coral populations face a multitude of environmental disturbances, however one of the most devastating to the reefs in the Indo-Pacific is the crown-of-thorns starfish (Acanthaster planci), which feeds on the tissues of live corals. The rate at which these individuals feed combined with the explosion of populations in times of outbreak have been seen to exert some of the biggest pressures on coral reefs to date. Following recent episodes of crown-of-thorns starfish (COTS) outbreaks, research on the organism has become increasingly prevalent on the scientific …

Seagrass Community Change At Three High Risk Ports In The Great Barrier Reef World Heritage Area From 2005 To 2014, Celeste Venolia

Independent Study Project (ISP) Collection

Seagrass meadows are extremely valuable and dynamic ecosystems currently facing pressure from anthropogenic disturbances. Seagrass ecosystems are declining globally because of direct and indirect threats that shift environmental conditions controlling seagrass distribution. Seagrass species responses to disturbances vary based on a number of factors including life history strategy. The goal of this study was to map and analyze patterns of dominant seagrass species change at Cairns and Gladstone from 2005-2014 and Townsville from 2007-2014. This compilation data set was symbolized according to the life history strategy of the species. The major disturbances during this time period were physical damage from …

Symbiont Type And Photophysiology Of Acropora Loripes And Platygyra Daedalea Under Future Scenarios Of Rising Ocean Temperatures And Pco2, Lauren Howe-Kerr

Independent Study Project (ISP) Collection

Coral cover is declining at an alarming rate, and it is estimated that 60% of reefs worldwide may be lost by 2030. Elevated seawater temperatures and ocean acidification are contributing to an increase in the frequency and severity of bleaching events. These events disrupt the symbiosis between corals and their photosynthetic dinoflagellates (Symbiodinium spp). Relatively little is known about the ability of corals to acclimatize to changing environmental conditions or whether the rate of climate change is too fast for corals to keep up, limiting the accuracy of future predictions for reef resilience. However, the ability of some coral species …

Magnetic Island Marine Park Zones: Effects Of Fishing Restrictions On Predatory Reef Fish Populations, Casey Wilson

Independent Study Project (ISP) Collection

Over the past several decades industrialized fishing practices have decimated fish stocks worldwide. Top-down trophic cascades have occurred within many marine ecosystems as top predators are removed. Numerous regions world wide are being designated as marine park “no-take” zones in order to aid in the recovery of these species and with the hope that surplus population will spillover into unprotected zones..

This study aimed to determine if there were significant differences in abundances of three major families of predatory reef fish (Serranidae, Lutjanidae, and Lethrinidae) between fringing reefs located in four bays of various zones around Magnetic Island, QLD. Data …

Fauna Census Of Intertidal Cliffs, Mangapwani, Zanzibar, Emily Jankowski

Independent Study Project (ISP) Collection

Due to their extreme variations in condition over the course of a day, intertidal zones are challenging environments. Organisms that live there must be prepared to cope with both exposure and submersion, not to mention the temperature variations that accompany these conditions. The differing tolerances and adaptations of various organisms to these conditions generally cause patterns of vertical zonation to occur in the intertidal zone, especially when the shore is steep and rocky. Understanding the ecology of shore environments is important to future conservation and management efforts. This study was conducted on a beach in Mangapwani, Zanzibar at at 6˚ …

Marine Animalia Organism Diversity And Reef Condition On Two Reef Sites At Big Creek Beach And Boca Del Drago, Bocas Del Toro, Panamá, Bri Tiffany

Independent Study Project (ISP) Collection

Ocean acidification, climate change, overfishing, and coastal development are endangering coral reefs across the globe. In Bocas del Toro, Panamá, coral reefs are especially threatened by the rapid growth in tourism and the subsequent anthropogenic effects caused by an increased human presence. To evaluate reef condition in this area, a study comparing percent coverage of live and dead coral as well as the diversity of marine Animalia organisms was conducted at one reef site in Big Creek beach and one reef site in Boca del Drago, Isla Colón, Bocas del Toro. It was predicted that dead coral cover would be …

The Pelagic Artisanal Fishing Of Mangapwani, Northern Unguja, Shavonne Stanek

Independent Study Project (ISP) Collection

A total of 99 interviews were conducted. Over a period of 28 days from April 5- May 2, 2015, a total of 75 interviews were conducted with 72 fishermen, 2 drying processors and 1 Bwana Diko. During a 5 day preliminary period from March 12-16, 2015, a total of 24 interviews were conducted with 7 fishermen and 14 drying processors. The interviews focused on their work in the local fishing industry, the amount of fish caught and dried, and their opinions on the sustainability of their industry. The interviews were conducted using a translator who relayed the responses in English …

Fish Use Of Largely Unexplored Sub-Tidal Habitats In The Hinchinbrook Channel Estuary, Queensland, Alexandra Parisien

Independent Study Project (ISP) Collection

This study examines the use of sub-tidal open-bottom, rocky, and seagreass habitats by the Siganus genus (herbivores), Gerres genus (benthivores), and planktivores in the Hinchinbrook Channel Estuary in Queensland, Australia. The Hinchinbrook Channel Estuary, a tropical estuary cutting between Hinchinbrook Island and the Australian mainland, is surrounded primarily by mangroves. Its sub-tidal habitats are largely unexplored due to factors such as low visibility and the presence of estuarine crocodiles. In this study, I reviewed 699 underwater videos collected by James Cook University PhD candidate Michael Bradley in order to analyze feeding and movement behavior of pre-identified fish.

The results of …

Examining Predation As A Possible Means Of Controlling Crown-Of- Thorns Starfish (Acanthaster Planci) Outbreaks On Reefs Around Lizard Island, Australia, Amanda Chan

Independent Study Project (ISP) Collection

Since the world’s coral reefs are currently threatened by a variety of different natural and anthropogenic factors, research on protecting coral reefs is pivotal to protect these diverse ecosystems. However, only Indo-Pacific reefs such as the Great Barrier Reef are dying due to a corallivorous echinoderm threat known as the Crown-of-Thorns Starfish (Acanthaster planci). A. planci is a starfish which feeds on coral tissue and can quickly reduce coral cover on a reef during an outbreak. Although scientists are still unsure as to what causes these outbreaks, one suggestion is the predator-removal theory. The predator removal-theory states that major predators …

A Case Study Of Rhincodon Typus Scarring In Ningaloo Reef: An Assessment Of The Current Scarring Classification System, Laura Korman

Independent Study Project (ISP) Collection

Rhincodon typus are the largest fish in the sea, but little is understood about this elusive species. They are known to annually aggregate in Ningaloo Reef, Western Australia—the location of this study. In order to better understand this species, scarring was observed on a subset of the population that aggregates in Ningaloo Reef. In addition, the scarring classification system was examined to determine if it is the most effective classification system. R. typus were observed, and photographed from April 9th-April 25th, 2014. These photos were then used for identification and scarring classification purposes. The analysis of the scars on R. …

Advocacy For Marine Management: Contributions To A Policy Advocacy Initiative In The Maldives, Neal Collins

Capstone Collection

On June 5, 2009 a 42-­‐km2 area of coral reef situated in the Alif Dhaalu (South Ari) atoll of the Republic of Maldives was designated the South Ari Atoll Marine Protected Area (S.A. MPA) due to a globally significant whale shark aggregation site. The whale shark is notorious for its gargantuan size and docile nature, which has led to a burgeoning tourist industry that gives people the opportunity to swim with the gentle giants in tropical sites such as the Maldives. The S.A. MPA receives tens of thousands of visitors a year that engage in whale shark excursions, however, there …

Marine Turtle Health Assessment And Aquarium Suitability: Uzi Island, Zanzibar, Olivia “Warda” Crane

Independent Study Project (ISP) Collection

This study assessed the health of the marine turtles in the aquarium on Uzi Island. Health evaluations of each turtle included size, eating habit, and physical abnormalities. Behaviorally the sea turtles were observed at two different time periods multiple times. Results were compared to research on wild sea turtles. The conditions of the aquarium were evaluated for water quality and holding capacity. The water temperature, pH, and salinity levels were tested to assess the water quality. The results showed that the overall health of the sea turtles were positive from the normal activities and few abnormalities. The overall aquarium conditions …

Bioremediation Mariculture In Zanzibar, Tanzania: A Viability Assessment Of Using Bath Sponge And Pearl Oyster Farms To Filter Highly Olluted Waters In The Zanzibar Channel, Hayley Oakland

Independent Study Project (ISP) Collection

Bioremediation of polluted water off the coastline of the urban center of Zanzibar—Stone Town, Unguja—was assessed for implementation feasibility through bath sponge and pearl oyster mariculture. A vast research base of the city’s coastal area exists, including the pollution concentrations at various locations, the ramifications of this pollution on the fringing ecosystems, and the relevant water circulation system of eddies and passageways produced by the north flowing East African Counter Current. In following the experimental examples of bioremediation projects around the world, this study tested facets of the filtration abilities of marine sponges and oysters. Both organisms suggested strong pollution …

Assessment Of Genetic Connectivity And Potential Management Plans For The Coral Reef Ecosystems Of Guna Yala, Panama, Molly Mcentee

Independent Study Project (ISP) Collection

Genetic connectivity between three populations of the common reef sea urchin, Echinometra lucunter located in fringing reefs off the islands of Ukuptupu, Wichupwala and Porvenir in western Guna Yala was analyzed to give insight into population distribution and the most effective conservation management plans for the area. The reefs of Guna Yala are facing many threats on a global or regional scale including global warming, ocean acidification, sea level rise, disease and severe storms. On a local level, increasing stress is being placed on these reef ecosystems from human activity including coral mining, overfishing, and pollution. In order to prevent …

Exploring Marine Conservation Efforts In Tasmania: An Internship With Ocean Planet, Lauren Markram

Independent Study Project (ISP) Collection

I chose to conduct a dual internship with Environment Tasmania and Ocean Planet. Although I was located in the ET office and conducted participant observation within that environment, I specifically worked on the Ocean Planet campaign to promote marine conservation efforts throughout Tasmania. I was drawn to this internship because the oceans are often disregarded within the environmental movement despite the fact that they are the key to life on earth and are in a degraded state. Further, Tasmania’s marine environment is utterly unique, with ninety percent of its marine life found nowhere else on earth. Despite the magnificent biodiversity …