Baseline Assessment of the Coral Reef Habitat in Kaloko-Honokōhau National Historical Park Adjacent to the Proposed Honokohau Harbor Expansion and Development, Kona Kai Ola, 2006-2007

Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.Coral reefs are ecologically and economically important ecosystems, but highly susceptible to impacts of coastal development and, therefore, indicative of environmental degradation. A detrimental impact of coastal development is the stimulation of a benthic community shift to algal dominance from coral dominance. To identify reef degradation before it has advanced too far to be readily reversed, it is important that a sound monitoring program is initiated and maintained, and that procedures are in place to rapidly take mitigation measures if coral-reef condition metrics indicate negative change. In 2006, at the southern boundary of Kaloko-Honokōhau National Historical Park, 530 acres of public land were proposed to be developed into a mixed-use development that includes an almost 300% expansion of the existing Honokohau Small Boat Harbor. This proposed large-scale development has the potential to affect cultural and natural resources in Kaloko-Honokōhau NHP. A baseline study of the reefs in the vicinity of Honokohau Harbor was undertaken in order to generate a reliable and comprehensive assessment of the current (pre-harbor expansion) condition of the benthic communities within the Park. The study is comprised of three coral reef areas close to the Honokohau Small Boat Harbor and two reference sites presumed to be unaffected by onshore development. An overview of the current state of the benthic habitat for each site is presented, focusing on coral cover, algal cover, species composition, coral health, and macro-invertebrate abundance. Average coral cover across all sites was 47.4% +/- 6.4 SD and macroalgae were virtually absent (<0.5%). Coral cover at the five sites ranged between 31% and 58%, which is well within the range typically found on the west coast of Hawai'i. Dominant macroinvertebrates were large urchins, which are important herbivores. Additionally, individual coral colonies were identified to monitor coral mortality. A similar study is being conducted at the northern boundary of the Park where a residential development and a golf course are under construction. The results of both studies will be comparable, and provide baseline useful in monitoring for potential impacts of these nearshore developments.This study was funded by the National Park Service under Task Agreement # J8320060008 through the Hawaii-Pacific Islands Cooperative Ecosystem Studies Unit, Cooperative Agreement #H8080040012. We thank I. Williams, E. Brown, and W. J. Miller for their assistance with sampling design and statistics. We are grateful to I. Williams, DAR; E. Grossman, USGS; K. Knee and M. Parsons for letting us use their data. We thank R. Gmirkin and K. Wong for assistance in the field work and D. Duffy for his support. We thank two peer-reviewers for their review and comments. This work was performed under Hawaii Division of Aquatic Resources Special Activity Permit number PRO-2006-84 and PRO-2007-16. Mention of trade names or commercial products in this report does not constitute endorsement or recommendation by the National Park Service or the University of Hawaii

The occurrence of yellowfin tuna (Thunnus albacares) at Espiritu Santo Seamount in the Gulf of Mexico) at Espiritu Santo Seamount in the Gulf of Mexico

Pelagic fishes are not evenly dispersed in the oceans, but aggregate at distinct locations in this vast and open environment. Nomadic species such as mackerels, tunas, and sharks form assemblages at seamounts (Klimley and Butler, 1988; Fontenau, 1991). Fishermen have recognized this behavior and have placed moorings with surface buoys in deep waters to provide artificial landmarks, around which fish concentrate and are more easily captured. These fish aggregating devices (termed FADs) are common in the tropical oceans (see review, Holland, 1996). In a sense, it may only be the larger size that separates a seamount from a man-made FAD

Baseline Assessment of the Coral Reef Habitat in Kaloko-Honokōhau National Historical Park Adjacent to the Shores at Kohanaiki Development, 2006-2007 

Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.This study provides current-condition baseline data and long-term monitoring methodology for coral reef habitats within the northern portion of Kaloko-Honokōhau National Historical Park for 2006-2007. The Park contains approximately 596 acres of coral reefs, state-designated pristine coastal waters, and unique coastal aquatic ecosystems such as Hawaiian fishponds and anchialine pools. The Park is located on the rapidly urbanizing Kona Coast on the west side of Hawai'i Island and will be surrounded by large-scale developments that include a golf course; commercial, light industrial, and residential developments; and a possible harbor expansion resort complex. Coastal development in the Kailua-Kona area will also impact the Park's reefs through increases in fishing, anchoring, and recreational use. Worldwide, coastal development has had profound impacts on coral benthic communities, and is implicated in shifts from coral dominance to algal dominance with resulting loss of habitat for reef organisms. In response to the construction of the "Shores at Kohanaiki" development adjacent to the Park's north boundary, this study was initiated to establish a current baseline and to identify changes in percent coral cover, algal cover, and coral survival over time at two habitat zones within Kohanaiki Reef compared to two reference sites. In Spring 2006, Fall 2006, and Summer 2007, pre-development baseline data were collected on (1) randomly selected photo transects, (2) individual corals, and (3) macroinvertebrate densities to monitor coral reef health. Benthic cover at all three sites was primarily composed of coral, turf algae, and crustose coralline algae. Mean coral cover at Kohanaiki Reef as a whole remained stable throughout the 17-month study period, varying from 30.7 to 34.3%. Macroalgae were a minor component, comprising less than 1% cover at all sites on all survey dates except at Kohanaiki Reef vertical-wall sites where macroalgae were approximately 4.5% of benthic cover. Grazing urchin populations were present at all sites, averaging 6.0 urchins/m2 +/- SD 2.8. Acanthaster planci were present, but uncommon. Porites Tissue-Loss Disease was encountered on several Porites lutea colonies at the Kaloko Reference Site in the summer of 2006, and Porites Trematodiasis was observed throughout the study at all sites. Partial bleaching was widespread on Pocillopora meandrina heads at Kohanaiki Reef in October of 2005, but corals had recovered or died by the time of our surveys. Results indicate that the study design and survey methods are robust and have a good probability of correctly identifying >10% absolute change in coral cover over time.This study was funded by the National Park Service under Task Agreement # J8320050012 through the Hawai‘i-Pacific Islands Cooperative Ecosystem Studies Unit, Cooperative Agreement #H8080040012. We thank E. Brown, W. J. Miller, R. Steidl, and I. Williams for their assistance with sampling design and statistics. We thank R. Gmirkin for assistance in the field work and J. Beets for his support. We thank two peer-reviewers for their review and comments. This work was performed under Hawai‘i Division of Aquatic Resources Special Activity Permit number PRO-2006-84 and PRO -2007-16

The relative importance of introduced fishes, habitat characteristics, and land use for endemic shrimp occurrence in brackish anchialine pool ecosystems

Abstract Anchialine ecosystems are groundwaterfed brackish coastal habitats that contain high percentages of endemic fauna and are at risk from anthropogenic stressors, introduced species, and sea level rise. Data on endemic species distribution, habitat condition, and species/habitat interactions in this ecosystem are scarce across large spatial scales. This study offers the most thorough regional perspective on anchialine pool habitat characteristics along the western and southern coastlines of the island of Hawaii since the 1970s. Daytime surveys of 398 anchialine pools documented the widespread distribution of two dominant endemic shrimp Halocaridina rubra and Metabetaeus lohena in a wide range of habitats. Introduced fishes (tilapia, poeciliids) were present in about 25% of pools. Generalized additive models were used to determine the relationship between shrimp occurrence and pool characteristics, invasive species, water properties, and land use. Introduced fishes had a strong negative effect on the occurrence of H. rubra and M. lohena. High benthic silt cover and adjacent development also had significant negative relationships with shrimp occurrence. Our results indicate that conservation efforts should include controlling introduced fishes, preventing new introductions, minimizing siltation, and protecting groundwater resources and low-lying coastal areas

(Rhodophyta: Ceramiales) in a Hawaiian Fishpond: An Assessment of Removal Techniques and Management Options.

v. ill. 23 cm.QuarterlyAcanthophora spicifera (Vahl) Børgesen was unintentionally introduced to Hawai‘i in 1950 and has since become the most common nonindigenous algal species in the main Hawaiian Islands. On the west coast of Hawai‘i Island it has been documented at three sites, including Kaloko Fishpond in Kaloko- Honoko¯ hau National Historical Park. The fishpond has an open connection to the sea, increasing the risk that A. spicifera will establish itself on neighboring shallow coral reefs and rocky intertidal habitats. To diminish that risk and to develop an efficient management strategy, a range of approaches was assessed to control this invasive alga in Kaloko Fishpond. Removal techniques were labor intensive and had limited effect. All experiments showed a substantial initial decrease in algal density, but the long-term effect was minimal because of rapid regrowth. The most promising removal method was the use of submerged shelters to raise local densities of herbivorous fishes. Fishes grazed the alga and quickly reduced the biomass. However, the large number of predators and absence of topographical structure will make it challenging to provide sufficient shelters to increase the herbivorous fish population in the entire fishpond. A management strategy to substantially reduce the algal biomass in the fishpond includes a combination of biological control and periodic manual removal of the alga

Impalement of Marine Turtles (Reptilia, Chelonia: Cheloniidae and Dermochelyidae) by Billfishes (Osteichthyes, Perciformes: Istiophoridae and Xiphiidae)

Billfishes have long been known to impale a great variety of objects, but there are only two brief, obscure records of marine turtles being speared. Details are presented on these two, as well as on two other confirmed records; data from two additional unconfirmed records are also presented. In total, three species of marine turtles are known to have been impaled by three species of billfishes; a fourth species of fish and a fourth species turtle are listed in an unconfirmed case. Records come from the eastern and western Pacific as well as the eastern Atlantic. Of the four confirmed cases, the turtles survived in two, and apparently died as an effect of the spearing in the other two. In three confirmed cases only the impaled rostrum was encountered, and in one confirmed case the entire fish was found, with its rostrum piercing the turtle. There is no obvious advantage - or clear disadvantage - involved in impaling turtles. It is argued that these attacks are accidental, and the result of attempts made by the billfish to capture prey that are near the turtle. These spearings indicate that the chelonians serve as shelters for prey animals on the high seas, and thus, are further evidence of the pelagic existence of marine turtles. The impalings are evidence of a singular ecological role of the turtles - as live fish aggregation devices